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Mechanical and thermal behavior of concrete including waste tire and glass powder as fine aggregate and cement respectively Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-25 Reza Saghafi Lasemi, Masoud Ziaei, Mohammad Hadi Alizadeh Elizei, Reza Esmaeil Abadi
One of the recycling approaches of waste materials like tires and glass is to use them in concrete. In this paper, the effect of simultaneous use of waste rubber and glass powder, as partial substitution of fine aggregate and cement, on workability and mechanical properties in ambient temperature and after exposure to temperature of 600°C is investigated. In total, 13 mixtures were prepared. Except
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A review on fracture propagation in concrete: fundamentals, experimental techniques, modelling and applications Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-25 Salim Barbhuiya, Bibhuti Bhusan Das, Fragkoulis Kanavaris
This paper provides a comprehensive overview of fracture propagation in concrete, covering various aspects ranging from fundamentals to applications and future directions. The introduction section presents an overview of fracture propagation in concrete, emphasising its importance in understanding the behaviour of concrete structures. The fundamentals of fracture propagation are explored, including
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Optimised performance of ultrahigh-performance silicomanganese slag concrete by water glass immersion Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-22 Baifu Luo, Dong Wang, Mohamed Elchalakani
Silicomanganese slag (SS) is a byproduct of the ferroalloy industry. It causes environmental pollution and consume resources. In this study, water glass immersion was used to improve the performance of SS, which was utilised in the production of ultrahigh-performance concrete (UHPC). The results show that SS treated with a 2% water glass concentration for 24 h had 16 MPa higher compressive strength
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Numerical simulation and design of circular steel-reinforced concrete-filled steel tubular short columns under axial loading Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-20 Mizan Ahmed, Saad A. Yehia, Ramy I. Shahin, Mohamed Emara, Vipulkumar Ishvarbhai Patel, Qing Quan Liang
This paper presents a computational model for determining the axial responses of circular Steel-Reinforced Concrete-Filled Steel Tubular (SRCFST) short columns. A novel confinement model is formulated for the concrete-core that is effectively confined by the external circular steel tube and the embedded steel section. The modeling scheme of confinement is programmed in the mathematical model that utilizes
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Experimental study on static and impact properties of concrete incorporating nano-SiO2, nano-Al2O3 and Fe2O3 in single and combined forms Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-20 Mohammed Gamal Al-Hagri, Mahmud Sami Döndüren
This paper presents a comparative evaluation of the single and combined effect of nanoparticles on the static and impact properties of concrete. Nano-SiO2, nano-Al2O3 and nano-Fe2O3 were used separately and in combined forms as partial replacements of cement by 1% and 2% by weight. The impact of nanoparticles on the unit weight, compressive strength, split tensile strength, flexural strength, toughness
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Study on the post-fire mechanical properties of lightweight 3D printed concrete containing expanded perlite as partial replacement of natural sand Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-20 Zahir Azimi, Moein Mousavi, Habib Akbarzadeh Bengar, Akbar A. Javadi
Along with the rise in construction with 3D printing technology, 3D printed (3DP) structures also require weight reduction similar to conventional reinforcement concrete (RC) structures. In addition, the behaviour of this type of structure against fire needs to be investigated. The number of printed layers and the time gap between layers for the 3DP specimens were among the variables examined in the
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Experimental study on compressive strength of in-situ concrete tested with arc pressure method Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-20 Suhang Yang, Chen Hu, Zhifeng Xu
The innovative Arc Pressure Testing Method (APTM) is adopted in this study to obtain the strength of in-situ concrete and reduce damage to the concrete structure. This method is related to the double shear plane of the concrete core. A specific APTM apparatus is used to apply loads for obtaining the approximate pure shear stress and shear strength of the concrete core. Factors affecting the strength
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Abrasion resistance of milling steel fiber-reinforced ultra-high-performance concrete under various wearing conditions Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-20 Hengchang Wang, Baixi Chen, Yibo Yang, Yinggan Xia, Qifeng Xiao, Shaokun Liu, Wenying Guo
Ultra-high-performance concrete (UHPC) is susceptible to various forms of abrasion during its service life. This study investigates the abrasion resistance of UHPC by focusing on two primary causes of wear: traffic dynamic loads and hydraulic impacts. To enhance the material's resistance to abrasion, milling steel fibers were utilized, and for comparative purposes, straight steel fibers and hybrid
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Mixing approach for 3D printable concrete: method of addition and optimization of superplasticizer dosage Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-13 P.S. Ambily, Senthil Kumar Kaliyavaradhan, Shilpa Sebastian, Deepadharshan Shekar
This study systematically investigates the superplasticizer (SP) addition methods and optimum SP dosage with various water binder (w/b) ratios for mixing 3D printable concrete (3DPC). In the present study, five distinct strategies were adopted to arrive at the optimum Method of Addition (MoA). The first strategy applied the random mixing approach to identify the methods for adding SP with varying time
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Time-depth dependent chloride diffusion coefficients of self-compacting concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-08 Dongyun Liu, Chao Wang, Tong Guo, Jaime Gonzalez-Libreros, Yuanfei Ge, Yongming Tu, Lennart Elfgren, Gabriel Sas
Chloride attack severely impacts the performance of reinforced concrete. The total and free chloride ion concentrations (CICs) of self-compacting concrete (SCC) prepared with three supplementary cementitious materials (SCMs) - fly ash (FA), blast furnace slag (BS), and silica fume (SF) – were measured through the accelerated salt immersion tests. The apparent chloride diffusion coefficients (CDCs)
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New method for determining the Mode-I fracture toughness of shotcrete: edge notched partial disc test Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-08 Mohammad Omidi Manesh, Vahab Sarfarazi, Nima Babanouri, Amir Rezaei, Arsham Moayedi Far
Fracture toughness (first mode) of shotcrete samples was obtained employing Edge Notched Partial Disc (ENPD) type specimens. Notched Brazilian Discs (NBD) were also used in order to validate the results of the conducted ENPD experiments. Moreover, a numerical analysis was conducted on the ENPD tests to verify the correctness of the measured fracture toughness values compared to numerically obtain ones
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Effects a simplified numerical model for temperature profiles of early age concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-08 Aocheng Zhong, Massoud Sofi, Elisa Lumantarna, Zhiyuan Zhou, Priyan Mendis
The issue of early age concrete cracking is challenging and relies on the state of concrete soon after it is placed in the formwork. The concrete state is a function of the strains associated with thermal and other dilatations and the level of in-situ strength. Both strain and strength primarily require information on the temperature-time history of the concrete element. For larger elements, the thermal
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Confinement mechanism and constitutive model of SRC columns with cross-shaped steel sections Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-08 Hong Xiang, Fuyu Mao, Chen Wu, Shenglan Ma
This paper proposes a novel confined concrete constitutive model for steel reinforced concrete (SRC) columns with cross-shaped steel (CSS) sections based on the similar characteristics of descending branches in stress-strain curves of confined and unconfined concrete, by considering confinement degradation caused by the buckling of steel section or longitudinal reinforcement. The confined region of
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A damage constitutive model of polypropylene fiber reinforced recycled aggregate concrete based on AE amplitude-frequency extremum Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-07 Yu Yu, Xin Yang, Yu Tang
Adding polypropylene fiber into recycled aggregate concrete (RAC) can not only improve the performance, but also increase economic benefits. To study the single-blend and double-blend polypropylene micro and macro fibers and their effect on the compressive strength of RAC specimens, polypropylene micro fibers of two sizes and polypropylene macro fibers of two sizes were selected to design and produced
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Influence of elevated temperatures on mode I and mode II fracture toughness and fracture energy of nanoclay reinforced polymer concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-12-04 Ali Abdi Aghdam, Mostafa Hassani Niaki
Depending on the type of application, polymer concrete (PC) may be exposed to high temperatures. Therefore, it is important to investigate the influence of exposure to elevated temperatures on the fracture mechanics of PC. For this purpose, the PC composed of epoxy as resin, silica sand and crushed basalt as aggregates, and nanoclay as nanofiller is synthesized. The prepared PC is exposed to temperatures
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Durability properties of lightweight concrete with ceramic mold casting waste Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-28 Zhiyou Jia, José Aguiar, Sandra Cunha, Carlos Jesus, Fernando Castro
As the economy and industrialization have grown, the foundry industry has produced a significant amount of ceramic mold casting waste (CMCW). To promote resource utilization, this study investigates recycling CMCW as a partial replacement for lightweight aggregates in lightweight concrete. This study investigated the durability of lightweight concrete mixes with varying CMCW content, using surface
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Effect of an expansive agent on the interfacial bond and mechanical properties of carbon fibre-reinforced cement-based composites Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-27 Jinghui Dai, Jun Wang, Huigang Xiao
Improving the flexural strength of a chopped-carbon fibre-reinforced cement-based composite while promoting good workability is highly attractive for building high-rise large-span structures. This study utilized a sulphoaluminate-based expansive agent to optimize the mechanical properties of chopped-carbon fibre-reinforced cement-based composites by improving the fibre–matrix interfacial properties
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Load-bearing capacity of precast high-strength self-compacting recycled aggregate concrete column-to-column connections Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-27 Xiaoguang Chen, Zeger Sierens, Jiabin Li
Recycled aggregate concrete (RAC) often shows different strength and deformation properties to natural aggregate concrete (NAC) and may therefore have an impact on the connections between precast concrete elements. In this work, three simple connections between precast concrete columns were considered, including a wet connection with bedding mortar, a dry connection without bedding mortar and a monolithic
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Effects of hybrid metallic wastes on the strength and durability properties of cementitious mortars Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-27 Musa Yildirim, Hacer Bilir Özhan
The amount of industrial waste is increasing along with industrial production. Therefore, reusing or recycling these harmful wastes is quite a significant issue for waste management. Concrete, the most widely used material in the world, is a suitable place to use these wastes. This study used grinding swarf, which had not been used in cementitious composites before, and metal shaving from the CNC milling
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Shear thickening of cementitious suspensions: effect of high solid volume fraction and hydration Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-22 P. V. P. Moorthi, Prakash Nanthagopalan
During pumping of concrete, the lubrication layer (LL) formed at the interface of the concrete and the pipe plays a crucial role in facilitating the process. Shear thickening in this layer affects the concrete pumping significantly. However, very few studies are available in understanding the onset and intensity of shear thickening behavior of the lubrication layer. In this study, the effect of solid
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Impact of recycled concrete aggregates on the strength and durability properties of pervious concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-22 Mudasir Nazeer, Kanish Kapoor, Surinder Pal Singh
An investigation was designed to assess the performance of pervious concrete prepared with fly ash (FA) and recycled concrete aggregates (RCA) in place of Portland cement (PC) and natural aggregates (NA). The percentage of NA replacement with RCA was varied (0%, 50% and 100%), while the percentage of FA substitution was fixed at 10%. Various fresh (workability and consistency), mechanical (compressive
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Impact of supplementary cementitious materials and fibers in ECC on the fire resistance of hot-jointed SCC/ECC composites Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-21 Waqas Latif Baloch, Hocine Siad, Mohamed Lachemi, Mustafa Sahmaran
This research examines the influence of various supplementary cementitious materials (SCMs) and fibers on the fire resistance of composite systems (CS) that combine engineered cementitious composites (ECC) in tension with self-compacting concrete (SCC) in compression. The study was designed to determine the ECC formulation ideally suitable for optimizing mechanical properties and bonding performance
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Increasing service life of concretes in sewage treatment plants using silica fume and natural zeolite Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-21 Ali Dousti, Negar Saraei, Mohammad Shekarchi, Mohammad Nikookar
Microbiological attacks cause concrete structures used in wastewater collection and treatment facilities to deteriorate and degrade rapidly in short service lives. Hence, it is more cost-effective to produce concrete resistant to chemical and sulfuric acid corrosion. In the present study, a total of six concrete mixtures incorporating 7.5% silica fumes (SF) and 10% natural zeolite (ZE) were immersed
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Thermal conductivity and electrical resistance of carbon-based cementitious composites Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-20 Fatih Acikök, Ahmet Genç, Oğuzhan Şahin, İsmail Raci Bayer, Mehmet Kemal Ardoğa, Mustafa Şahmaran
The aim in this study was to produce multifunctional cementitious composites with advanced thermal and electrical performance, considering that these composites have high conductivity and can be used in, for example, deicing, electromagnetic shielding, antistatic or anticorrosion applications. Carbon fibre (CF) and carbon powder (CP) were used singly or together to develop cementitious composites with
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Thermal and mechanical properties of a sustainable bio-flax fiber based light-weight aggregate concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-20 M. Chellapandian, J. Maheswaran, N. Arunachelam
A novel lightweight aggregate concrete (LWAC) or lightweight concrete (LWC) is developed using the expanded perlite powder (EPP) and light-weight expanded clay aggregate (LECA) as a replacement for conventional fine and coarse aggregates respectively. Furthermore, the natural plant-based flax fiber in treated form was added to the LWC mix at three different volume fractions. The mechanical and thermal
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Mortars containing waste plastic from WEEE as replacement of natural aggregate: different strategies to achieve good mechanical properties Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-17 Luca Lavagna, Daniel Suarez-Riera, Nicoletta Mangani, Matteo Pavese
The use of waste plastic from Waste Electrical and Electronic Equipment (WEEE) as a substitute for natural aggregate in cementitious materials is an increasingly relevant issue. In fact, this would allow to recycle plastics destined for landfills and to decrease the use of new natural resources. However, replacing sand with plastic tends to reduce the mechanical properties of mortars due to the different
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Effects of desalinated sea sand on the alkali-silica reaction of seawater and sea sand concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-11 Dehui Wang, Qingnan Gong, Surong Luo, Zhengxian Yang
The application of seawater and sea sand concrete (SWSSC) can reduce the construction period and cost of island infrastructure, but it may also bring the risk of alkali-silica reaction (ASR) due to the presence of alkali ions in seawater and sea sand. To compare the characteristics of ASR between SWSSC and seawater and desalinated sea sand (DSS) concrete and investigate the effects of desalinated sea
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Meso-damage behavior of cement stabilized macadam for a long-time immersion based on particle flow theory Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-10 Guofang Zhao, Chengcheng Luo, Xiaoyong Wu, Xinqiang Wang, Yongkang Yan, Zhanyou Yan
Water can cause a certain degree of damage to cement stabilized macadam. If cement stabilized macadam is immersed in water for a long time, the degree of damage will be greater. In order to study the damage of cement stabilized macadam with long-time water immersion, a discrete element model of cement stabilized macadam was established in this paper. The Weibull distribution function was used to simulate
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Effects of mixture design parameters on the properties of belitic calcium sulfoaluminate concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-08 Israel Aguilar Rosero, Edgar Soriano Somarriba, Behzad Farivar, Cameron D Murray
Belitic calcium sulfoaluminate (BCSA) cement has well-established advantages such as a fast setting time, fast strength gain, long-term strength, shrinkage and sustainability. BCSA cement reaches an initial set in about 15 min at room temperature and can reach compressive strengths of over 27 MPa in about 2 h. While it can be mixed in a similar fashion to Portland cement (PC), a set retarder (such
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Simplified numerical model for the collapse analysis of RC frame under oblique impact Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-08 Yujing Zhou, Xiaowei Cheng, Yi Li, Fangfang Liu
The objective of this study is to develop a simplified numerical model that can be used to accurately and quickly conduct collapse analysis of a reinforced concrete (RC) frame impacted by a vehicle obliquely at 45°. The simplified numerical model included introduces a simplified RC frame and a simplified vehicle. For the simplified RC frame, a mixed modelling technique was used, in which structural
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Hybrid effect of polyethylene fibre and nano-calcium carbonate on the flowability and strength of a geopolymer composite Mag. Concr. Res. (IF 2.7) Pub Date : 2023-11-02 Hui Li, Li Li, Ning Zhang, Qi Feng
Using geopolymer composites to reduce the use of Portland cement can decrease carbon dioxide emissions. The focus of this study was on improving the strength of a geopolymer composite by assessing the positive hybrid effect of nano-calcium carbonate (NCC) and polyethylene fibres (PFs) of different lengths (6 mm and 12 mm). Fresh and hardened properties, including flowability and strength, were investigated
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Alkali activation of fly ash in self-consolidating concrete at low molar concentration Mag. Concr. Res. (IF 2.7) Pub Date : 2023-10-23 Muthu Kumar Palanisamy, Arun Murugesan, Abdul Aleem Mohamed Ismail, Deepasree Srinivasan
As a means of minimising the negative effects on the environment, the use of industrial byproducts in the building industry is becoming more popular. Recently, alkali activation of precursors has boomed in the market since activation of precursors improves mechanical properties and reduces the carbon footprint. However, one risk factor in alkali activation is molar concentration. This is because the
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Effects of mixture design parameters on the properties of belitic calcium sulfoaluminate concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-10-16 I. Aguilar Rosero, E.O. Soriano Somarriba, B. Farivar, C.D. Murray
Belitic calcium sulfoaluminate (BCSA) cement has well established advantages related to fast setting time, fast strength gain, long-term strengths, shrinkage, and sustainability. BCSA cement reaches initial set in about 15 minutes at room temperature and can reach compressive strengths of over 27 MPa (3.9 ksi) in about 2 hours. While it can be mixed in a similar fashion to portland cement, a set retarder
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Comparison of thermal conductivity and electrical resistivity of carbon-based cementitious composites Mag. Concr. Res. (IF 2.7) Pub Date : 2023-10-13 Fatih Acikök, Ahmet Genç, Oğuzhan Şahin, İsmail Raci Bayer, Mehmet Kemal Ardoğa, Mustafa Şahmaran
In this study, it was aimed to produce the multifunctional cementitious composites with advanced thermal and electrical performance considering that these composites having high conductivity serve for the purpose of de-icing, electromagnetic shielding, anti-static, anti-corrosion, and so on. Carbon fiber (CF), and carbon powder (CP) were used singly or together to develop cementitious composites having
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Performance testing of roof beam–column connections for precast N-system Mag. Concr. Res. (IF 2.7) Pub Date : 2023-10-03 Labeat Misini, Jelena Ristic, Viktor Hristovski, Danilo Ristic
The precast N-system based on embedded-pin connections is used widely for constructing large precast industrial halls in south-eastern Europe and further afield, including areas of high seismicity. To assess realistically the seismic performances, safety margins and limitations of the connections, experimental investigations are essential. Experimental results from laboratory tests on a large-scale
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Compression and bending of alkali-activated slag cementitious materials at high temperature Mag. Concr. Res. (IF 2.7) Pub Date : 2023-10-02 Xueyuan Lv, Hao Cheng, Pang Chen, Yonggan Li, Zhiyong Wang
Alkali-activated slag cementitious material (AASCM) with manufactured sand can effectively utilise industrial waste slag and reduce river sand consumption. Steel fibres can effectively improve the mechanical properties of AASCM. Therefore, in this study, the influence of steel fibres and aggregate type on the compression and bending properties of AASCM after high-temperature treatment was investigated
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Prediction of fire spalling behaviour of fibre-reinforced concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-29 Jin Jiang, Ming Wu, Mao Ye
Fire spalling prediction of fibre-reinforced concrete containing polypropylene (PP) or steel fibre at elevated temperatures is challenging. It is difficult to use conventional methods, such as finite-element modelling and discrete-element modelling, to solve the problem, because of the complicate coupling mechanism of PP and steel fibres in concrete. To this end, two artificial neural network (ANN)
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Comparison of fundamental properties and durability of mortar mixed with antibacterial functional materials Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-29 Il Sun Kim, So Yeong Choi, Eun Ik Yang
The fundamental properties and durability of mortar mixed with phytoncide, zeolite or copper powder were evaluated. For different phytoncide substitution ratios (SRs), there was no significant difference in the flow, compressive strength and flexural strength of the mortar. With an increase in the SR of zeolite, the workability decreased, while the compressive strength, flexural strength and chloride
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Characterisation and standardisation of different-origin end-of-life building materials for assessment of circularity Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-28 Emircan Ozcelikci, Gurkan Yildirim, Hocine Siad, Mohamed Lachemi, Mustafa Sahmaran
Construction and demolition waste (CDW) management and recycling practices are crucial for transitioning to a circular economy. The focus of this study was on the detailed characterisation of different CDWs (hollow brick (HB), red clay brick (RCB), roof tile (RT), concrete and glass) collected from seven different demolition sites in Turkey. The CDWs were characterised based on particle size distribution
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State of the art review of bamboo-reinforced concrete structural elements Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-25 Prasannakumar Radha Himasree, Chaaruchandra Korde, Roger P. West, Namasivayam Ganesan
Bamboo is a naturally sustainable material that has been used in construction for a very long time. Investigations on the feasibility of using bamboo for reinforcing concrete have been carried out by various researchers. However, the lack of construction codes and design procedures for bamboo-reinforced concrete (BRC) structures is preventing structural engineers and construction firms from using bamboo
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Mesoscale modelling of CRTS II slab tracks subjected to thermal action and vehicle loads Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-22 Hua-Peng Chen, Wen-Bin Li, Yu Jiang
Evaluation of the damage and deformation of cast-in-situ concrete joints between the precast concrete track slabs of the China Railway Track System (CRTS) II is crucial to the safe operation of high-speed railways. To investigate the damage and deformation evolution of concrete joints under thermal action (caused by the natural meteorological environment) and vehicle loads, a two-dimensional thermal–mechanical
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Evolutionary computing-based models for predicting seismic shear strength of RC columns Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-14 Mohamed K. Ismail, Ahmed Yosri, Wael El-Dakhakhni
A number of regression-based models have been proposed to quantify the seismic shear strength of reinforced concrete (RC) columns. However, most of these models suffer from a high degree of uncertainty as a result of the limited datasets used in their development and/or the classic approaches used to capture the non-linear interrelationships between the shear strength and influencing factors. To address
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Application of electro-injection method in improving cement mortar durability Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-14 Hongyou Shan, Jinxia Xu, Yuanhai Jiang, Hongfei Liu, Gang Zheng, Guomin Cui
An electrochemical method for improving the durability of cement mortar by injection of nanoparticles (alumina (Al2O3)-coated silica (SiO2)) is presented. In this method, nanoparticles are injected into cement mortar pores under an external electrical field, refining the pore structure of cement mortar. The efficiency of electro-injection nanoparticle treatment with different applied electric fields
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Effect of typical formworks and release agents on aesthetical surface quality of concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-14 Qian Jiang, Cheng Yu, Maixi Zhou
This work involved investigating formwork surface characteristics and concrete surface quality. The results show that release agent types and formwork materials have a great impact on the wettability of a formwork–concrete interface, although all the formwork surfaces, with or without release agents, are hydrophilic. Remarkably, inhomogeneous roughness characteristics are only observed for a steel
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Numerical simulation of fresh concrete flow in the L-box test using computational fluid dynamics Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-14 Raoudha Sassi, Ahmed Jelidi, Sami Montassar
Concrete remains a widely used material in construction. As structures become more optimised, a deeper understanding of the rheology of the concrete mixture is necessary. This paper aims to numerically simulate the flow of fresh concrete in the L-box apparatus, with the objective of gaining insights into its rheological behaviour and predicting its properties. The fresh concrete flowing through the
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Evolution and damage threshold of pores for natural pumice concrete under freeze–thaw cycles Mag. Concr. Res. (IF 2.7) Pub Date : 2023-09-08 Xiaoxiao Wang, Yufei Dong, Lei Jing, Changwang Yan, Shuguang Liu
Natural pumice concrete (NPC) is a building material with the advantages of light weight and high thermal resistance. In cold regions, NPC undergoes damage from freeze–thaw cycles. Freeze–thaw damage is closely related to changes in the pore structure of concrete. Therefore, it is meaningful to investigate the evolution characteristics and damage threshold of pore structure for NPC under freeze–thaw
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Prediction of concrete carbonation based on the inverse Gaussian process and Bayesian method Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-29 Long Chen, Tianli Huang, Hua-peng Chen
Concrete carbonation is one of the major factors causing the deterioration of reinforced concrete structures. Therefore, accurately predicting the carbonation depth is of great significance in safety assessments of structures. The aim of this study was to develop a method to predict carbonation behaviour by incorporating multi-source information using the Bayesian method. First, the inverse Gaussian
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Development of bio-based blended ash and fly ash-based alkali-activated concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-29 Bhagyashri A. Lanjewar, Ravijanya Chippagiri, Vaidehi A. Dakwale, Rahul V. Ralegaonkar
Owing to rapid industrialisation and urbanisation there has been a significant increase in the manufacture and application of cement, resulting in high carbon dioxide (CO2) emissions into the atmosphere. This paper investigates alternative binders that have reduced carbon dixoide emissions and better performance. The study elaborates the mix design of novel concrete, wherein the principle raw material
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Investigation of physical and mechanical properties of nanocarbon black-added lightweight UHPC Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-29 Mehmet Uzun
The high specific density of concrete significantly increases the dead load in buildings. Using pumice, which is a volcanic material, as an aggregate in concrete decreases the concrete's density. However, pumice causes a decrease in the mechanical properties of concrete owing to its porous structure. The improvement of the mechanical properties of concrete can provide material savings by reducing the
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Understanding the CO2 utilisation potential of various cementitious materials through review and analytical modelling Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-24 Saurav Kumar Saikia, Aditya Singh Rajput
Carbon dioxide sequestration in cement-based materials has emerged as a promising avenue for utilising captured carbon dioxide (CO2) and reducing the carbon dioxide footprint of the concrete industry. This article presents a comprehensive review of various studies conducted in this domain with a particular emphasis on factors affecting the carbon dioxide uptake potential of various concrete types and
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Early strength development of mortar with addition of calcium formate and electric field curing in cold climates Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-23 Zhouzhou Yang, Jianghong Mao, Bixiong Li, Sili Li, Wei Qian, Hao Li, Jun Ren
The rapid development of early strength of concrete in cold regions is the primary measure to ensure its resistance to frost damage. In this context, this paper incorporates 2 wt% calcium formate into a mortar and electrically cures it by passing an alternating current (AC) at a temperature of −10°C. During testing, a temperature probe monitors the real-time changes in the internal temperature of the
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Tortuosity quantification of fly ash concrete considering interfacial transition zone Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-17 Lianjuan Miao, Chujie Jiao
For concrete materials, durability is closely related to the mass transport property. The tortuosity of concrete material is an important factor accounting for the transport property. In this paper, the tortuosity of concrete is studied by mercury intrusion porosimetry and permeation tests in order to consider the existence of aggregate induced in the interfacial transition zone (ITZ). Tortuosity gained
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Efficient approaches to autogenous and autonomous self-healing concrete: a review Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-17 Iman Abavisani, Omid Rezaifar, Ali Kheyroddin
Concrete and cementitious composites have far been the main and most widely used construction materials throughout the world due to their outstanding features, such as high structural properties, accessibility and relatively low production costs. However, these materials are prone to degradation caused either by automatic cracking or external excitations, which leads to structural degradation. The
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Influential factors on concrete carbonation: a review Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-09 Amir Karimi, Mohammad Ghanooni-Bagha, Ehsan Ramezani, Ali Akbar Shirzadi Javid, Masoud Zabihi Samani
After water, concrete is the most widely used substance on the planet. Carbonation of cementitious materials is an inevitable process through which concrete compositions react with carbon dioxide. Carbonation leads to rebar corrosion in reinforced concrete (RC) structures, reducing structures’ longevity. This process increases cement production, for repair and replacement, which brings about more carbon
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Effect of slag on strength, microstructure and rebar corrosion of chloride-rich geopolymer concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-08-08 Jnyanendra Kumar Prusty, Bulu Pradhan
The effects of slag substitution (0, 30 and 60%) and chloride concentration (1.5 and 3.5% sodium chloride) on microstructural changes during strength development between 28 and 360 days, rebar corrosion up to 600 days and chloride binding capacity (CBC) in chloride-rich geopolymer concrete (GC) were investigated. The microstructural changes of the GC were evaluated through field emission scanning electron
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Numerical simulation of punching shear in RC slabs subjected to elevated temperatures Mag. Concr. Res. (IF 2.7) Pub Date : 2023-07-31 Hamed Sadaghian, Seyed Saeed Mirrezaei, Masood Farzam
Studies on the punching shear of reinforced concrete (RC) slabs exposed to fire are very limited. To address this shortcoming, a series of numerical analyses were carried out to study the effects of several parameters on punching shear behaviour of RC slabs under fire conditions. Variables of the study were: (i) gravity load levels before exposure to fire; (ii) presence or absence of shear reinforcement;
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Hybridisation effect of steel–polypropylene fibres in high-volume fly ash concrete Mag. Concr. Res. (IF 2.7) Pub Date : 2023-07-31 Onkar Mishra, Surinder Pal Singh, Shweta Mishra
The paper presents the results of an investigation conducted to investigate the effects of hybrid fibres (polypropylene (PP) and steel (S) fibres on the workability, compressive strength, flexural strength and flexural toughness of high-volume fly ash concrete (HVFAC). Different combinations of PP and S fibres (PP fibre 0–100% and S fibre 100–0%) were incorporated to a total fibre volume fraction of
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Influence of deep penetrating sealer on concrete surface performance Mag. Concr. Res. (IF 2.7) Pub Date : 2023-07-27 Bobo Xiong, Cheng Li, Jing Xu, Xiaochun Lu, Bin Tian, Bofu Chen, Congcong Lyu, Wanhao Liu
Deep penetrating sealer (DPS) is a general term for a class of waterproofing agent that can fill the internal pores of concrete; it is produced by mixing an alkali metal silicate solution as the base material with catalysts and additives. The objective of this study was to investigate the characteristics and mechanism of the effect of different amounts of DPS sprayed on concrete. The water absorption
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Effect of fly ash on the atomic scale structure of C–S–H during Portland cement hydration Mag. Concr. Res. (IF 2.7) Pub Date : 2023-07-12 Kanchan K Kole, Shedigumme Gautham, Prosenjit Khan, Ripan K Biswas, Kajari Dasgupta, Ashok K Mandal, Madambikkattil Bharathan Anoop, Jiten Ghosh, Saptarshi Sasmal
Cement hydration has a direct influence on the mechanical and durability properties of concrete. Understanding the formation and evolution of hydration products at atomic scale during different stages of hydration is important in order to engineer the material for specific performance. However, research investigations on the effects of adding supplementary materials like fly ash (FA) on the development
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Long-term performance of basalt fibre-reinforced marine geopolymer concrete in harsh environment Mag. Concr. Res. (IF 2.7) Pub Date : 2023-07-12 Sherin Khadeeja Rahman, Riyadh Al-Ameri
The current study reports on the long-term structural performance of novel reinforced marine geopolymer concrete beams under accelerated weathering conditions. The study covers the flexural performance of 40 geopolymer concrete beams reinforced with basalt fibre-reinforced polymer (BFRP) bars, including 12 beams under sustained loading when exposed to 3, 6 and 12 months of accelerated marine environment