The purpose of this study was to investigate how the addition of shrinkage-reducing polycarboxylate superplasticiser (SRPC) affected the shrinkage of cement-based materials (CBMs). SRPCs can signif...

In this paper, the macro–micro interfacial bond behaviour of steel fibres embedded in ultra-high-performance concrete (UHPC) matrix was investigated using a single-fibre pull-out test with the para...

Progressive collapse of reinforced concrete flat plate systems can be significantly influenced by the post-punching performance of their slab–column joints under large deformations. This work prese...

The paper investigates the potential for recovering granulated blast furnace slag after four to five years’ storage in a stockpile (weathered) for use as an addition in concrete. The initial resear...

Moisture transport has a great impact on concrete durability. In this study, a hard-pulse one-dimensional frequency coding sequence of low-field nuclear magnetic resonance (LF-NMR) imaging was appl...

The effect of foam porosity on absorption, chloride ingress and resistance to corrosion of embedded steel under a chloride environment was studied. Performance of mixes with water/cement (w/c) ratio of 0.5 and moderate and high foam contents of 20 and 50% were determined and compared with those of a base mix with the same proportions but without foam incorporation. A structural grade foam concrete

Structural health monitoring (SHM) of civil engineering structures has been widely developed to increase safety and to provide cost-effective maintenance programmes. Although the current approaches...

The focus of this work was the thermal properties (thermal conductivity, thermal diffusivity, specific heat capacity and linear expansion coefficient) of steel-fibre-reinforced reactive powder conc...

Cracking is a common form of damage in reinforced-concrete (RC) beams. Cracks affect the frequency and deflection of RC beams. Although a model for the natural frequencies of RC beams with one or t...

In the present work, textile-reinforced concrete (TRC) specimens were produced using high-performance natural curaua unidirectional fabrics as reinforcement. Portland cement was partially replaced ...

In this work, different cementitious systems were used to investigate the shrinkage of concrete under plastic and drying conditions. Emphasis was placed on Portland limestone cement (type IL) with ...

A ternary hardening-accelerating admixture for Portland cement, comprising calcium fluoroaluminate (11CaO.7Al2O3.CaF2), calcium thiocyanate (Ca(SCN)2) and triethanolamine (C6H15NO3), was studied. T...

This investigation aims to study the abrasion and impact resistance of fibre-reinforced concrete before and after exposure to salt scaling. Different types of steel fibre and different mixture comp...

The paper presents new compositions of lime heat-insulating dry building mixtures, designed specifically for the finishing of aerated concrete, characterised by the presence of a modifying additive...

Seismic assessment of reinforced concrete (RC) buildings heavily relies on the deformation capacity predictions of members. Similarly, the prediction of the deformation capacity of retrofitted RC c...

In recent years, concrete-filled steel tubular (CFST) arches have been widely used and the out-of-plane buckling of CFST arches has become a major concern. So far, few studies have investigated the...

In recent decades, different macro-models have been proposed for simulating the behaviour of concrete shear walls because of their significant role in the seismic performance of urban buildings. Th...

The complexity in the shear behaviour of reinforced concrete (RC) beams increases with a decrease in the shear span to effective depth ratio (av/d) because of the increase in the contribution of co...

Reinforced concrete in aggressive environments, has higher concrete clear cover provided to protect the reinforcement against corrosion. However, providing such higher cover in severe environments ...

Through upscaling from the hydration products to a macroscopic composite, a multi-scale framework is proposed to predict the effective properties of ultra-high-performance concrete (UHPC) with different reaction degrees. In this framework, the hydration of Portland cement and the pozzolanic reaction of silica fume (SF) are taken into consideration. Different length scale representative volume elements

This paper presents two different approaches to model corrosion-induced crack propagation in reinforced concrete structures. Both approaches are based on a thick-walled cylinder analogy, in which t...

Bugholes, considered as an aesthetical problem, generally appear on concrete surface. Such surface imperfections may accelerate the ingression process of liquids and chlorides. Chloride penetration...

In a post-tensioned precast concrete beam–column connection, the precast beams are post-tensioned to ensure the integrity of the connection and to provide recentring characteristics when the connec...

Digital fabrication of concrete elements requires a better understanding of the rheological behaviour of the cementitious material used. Fresh concrete is known to be a thixotropic material having ...

The corrosion resistance of concrete strengthened with three types of fibre-reinforced polymer (FRP) sheets (unidirectional carbon-FRP (CFRP), unidirectional basalt-FRP (BFRP) and bidirectional BFR...

Replacement of Portland cement (PC) by fly ash (FA) is currently limited to 15–30% by mass, mainly due to low early age strength development of concrete. This research uses calcium formate (Ca(HCO2...

The potential of utilizing alkaline industry waste with weak or no cementious properties for CO2 capture and for new binders by accelerated carbonation was studied and a comparison study of steel s...

Confined masonry (CM) structures have been widely adopted by many developing countries located in seismically active regions due to their satisfactory seismic performances, cost-effectiveness and e...

Based on the structural characteristics of pervious concrete, an improved mix design method for pervious concrete was developed based on permeability, compressive strength and slurry layer thicknes...

Concern has been expressed in the recent decades about the corrosion prediction of concrete structures in a chloride environment. This paper summarises the corrosion prediction models developed for...

A vast number of numerical approaches have been used to simulate the non-linear behaviour of concrete and reinforced concrete members at different scales. Most approaches were based on the finite-e...

The use of supplementary cementitious materials as partial Portland cement substitutes in concrete is one of the best strategies for reducing carbon dioxide (CO2) emissions in the cement industry, ...

This paper studies the method of determining the fracture parameters of pre-notched concrete beams with horizontal pre-set cracks and the influence of fracture intersection on fracture characterist...

The expansion deterioration that occurs in concrete structures exposed to high temperature fluctuation in wet environments is often attributed to delayed ettringite formation (DEF). Due to the comp...

Reinforced concrete (RC) walls subject to in-plane lateral loads are essentially subject to axial compression and tension forces in the respective end regions of the wall. The tension forces are in...

This study investigated the effect of silicate modulus (M = silicon dioxide (SiO2)/sodium oxide (Na2O) by mass) and activator content S (mass proportion of sodium oxide and silicon dioxide to groun...

In Portland cement concrete, a high content of cementitious materials can cause early cracking. This study investigated the effects of minimised paste volume in structural concrete made with Portla...

Plastic concrete is a ductile building material, made of aggregate, cement, water and bentonite clay mixed at a high water/cement ratio. To explore its deformation behaviour and failure criteria, w...

Calcined clays represent a promising supplementary cementitious material (SCM) to face the growing demand for binders and to compensate for the decreasing availability of established SCMs worldwide. A fundamental knowledge about the interaction of cementitious systems with polycarboxylate ether (PCE)-based superplasticisers is required for their optimised use as clinker substitute. As clays contain

Various thermal conductivity models for multi-phase materials have been suggested in the literature. However, none have been specifically developed or adapted for structural lightweight aggregate concrete (SLWAC). In this context, the main purpose of this study was to develop a new simple model to predict the thermal conductivity of SLWAC, taking into account the volume fraction and thermal characteristics

Nowadays, basalt fibre is gaining popularity in the field of construction materials due to its low production cost and enhanced mechanical properties. However, research is still needed into the use...

The effect of temperature on the chloride binding capacity (CBC) of cementitious materials was investigated. A reactive transport model including thermodynamic equilibrium, kinetic control and surface complexation was applied to investigate this effect. The surface complexation model was completed by introduction of the equilibrium constant of calcium silicate hydrate (C–S–H) complexation reactions

The main objective of this study was to determine the hydration activity and shrinkage of high-strength concrete (HSC) after the incorporation of different particle sizes of calcium carbonate (CaCO...

In order to improve the performance of wet joints in prefabricated ultra-high-performance concrete (UHPC) bridges, a comparative study was conducted to investigate the flexural behaviour of UHPC jo...

This paper presents an experimental investigation into the mechanisms altering the pull-out behaviour of partially pulled hooked-end steel fibres inside an artificial crack exposed to wet–dry cycles of chlorides and carbon dioxide for 6 months. Mechanical and corrosion damage at the surface of the steel fibre was investigated using three-dimensional optical interferometric profiling, and petrographic

The effects of aramid, glass, basalt and polypropylene (PP) fibres in a fibre-reinforced cementitious composite (FRCC) were examined. Specifically, this work investigated the effects of the fibres ...

This study examines the flexural performance of reinforced concrete (RC) columns strengthened through a seismic jacket technique developed using a prefabricated steel bar unit that forms peripheral...

In this paper, a parametric study based on the load transfer test specified in ETAG 013 was performed with the aim of investigating the efficiency of the confining reinforcement in the local anchor...

Cemented paste backfill (CPB), a soft concrete-like material, is extensively used in underground mines worldwide for ground support and/or mine waste disposal. One of the most important ingredients...

This paper examines the effect of heating rate on the microstructure of cement-based systems exposed to sustained elevated temperatures. Besides a conventional mortar designed to attain a compressi...

Several bond–slip models considering corrosion effects are available in the literature to describe the change in bond due to corrosion of longitudinal reinforcement. However, these models do not co...

By electrostatic repulsion and steric hindrance, polycarboxylate-based superplasticiser (SP) decreases the water demand for cement hydration in mortar/concrete production. Subsequently, less water is needed for a prescribed flowability, which improves its concurrent design limits of strength and flowability. Nonetheless, SP also introduces unfavourable dilatancy (or shear thickening) in mortar due

In this paper, based on pull-out test results, the influence of the number of chloride wetting–drying cycles, concrete strength, cover thickness, steel bar diameter and number of textile layers use...

The diffusion mechanism for chloride ions in concrete with varying water/cement ratio (w/c) is studied by chloride ion spray testing. A new model of chloride diffusion coefficient, which varies with the ingress depth of chloride ion and w/c, is developed. A spatial time-dependent reliability model of time to corrosion initiation (TCI) for reinforced concrete (RC) structures is developed, considering

In cold regions, concrete practitioners face challenges when trying to achieve quality results with concrete produced under low temperatures. The addition of nano-silica, which has vigorous reactiv...

This paper seeks, as a part of Algerian policy, to encourage the reconstruction of the ground in order to achieve economic reconstruction and the safety of inhabitants and the environment. The stud...

This paper utilises non-linear finite-element analysis with three-dimensional (3D) solid elements to gain insight into the role of shear reinforcement in increasing punching shear resistance at int...

The cross-shaped concrete-filled steel tube (CFST) is a new shape of column, which avoids convex corners and increases the interior area of the room. Cross-shaped CFSTs possess high bearing capacit...

The combination of realkalisation and migrating corrosion inhibitor (MCI) was proposed as a protective technique for structures subjected to carbonation-induced corrosion; the effects on passivated...

The precast industry, due to its specific early-age strength requirements for hollowcore (HC) slab products, has been reluctant to introduce alternative cementitious materials such as ground granul...