当前位置: X-MOL 学术Front. Struct. Civ. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic concrete
Frontiers of Structural and Civil Engineering ( IF 3 ) Pub Date : 2022-01-27 , DOI: 10.1007/s11709-021-0793-x
Ali Akbarpour 1 , Mahdi Mahdikhani 1 , Reza Ziaie Moayed 1
Affiliation  

One of the strategic materials used in earth-fill embankment dams and in modifying and preventing groundwater flow is plastic concrete (PlC). PlC is comprised of aggregates, water, cement, and bentonite. Natural zeolite (NZ) is a relatively abundant mineral resource and in this research, the microstructure, unconfined strength, triaxial behavior, and permeability of PlC made with 0%, 10%, 15%, 20%, and 25% replacement of cement by NZ were studied. Specimens of PIC-NZ were subjected to confined conditions and three different confining pressures of 200, 350, and 500 kPa were used to investigate their mechanical behavior and permeability. To study the effect of sulfate ions on the properties of PlC-NZ specimens, the specimens were cured in one of two different environments: normal condition and in the presence of sulfate ions. Results showed that increasing the zeolite content decreases the unconfined strength, elastic modulus, and peak strength of PlC-NZ specimens at the early ages of curing. However, at the later ages, increasing the zeolite content increases unconfined strength as well as the peak strength and elastic modulus. Specimens cured in the presence of sulfate ions indicated lower permeability, higher unconfined strength, elastic modulus, and peak strength due to having lower porosity.



中文翻译:

天然沸石和硫酸根离子对塑性混凝土力学性能和微观结构的影响

用于填土堤坝以及改变和防止地下水流动的战略材料之一是塑性混凝土 (PLC)。PLC 由骨料、水、水泥和膨润土组成。天然沸石 (NZ) 是一种相对丰富的矿产资源,在本研究中,用 0%、10%、15%、20% 和 25% 的水泥替代水泥制成的 PlC 的微观结构、无侧限强度、三轴性能和渗透性新西兰进行了研究。PIC-NZ 试样在受限条件下使用 200、350 和 500 kPa 三种不同的围压来研究它们的力学行为和渗透性。为了研究硫酸根离子对 PlC-NZ 样品特性的影响,将样品在两种不同环境之一中固化:正常条件和存在硫酸根离子的情况下。结果表明,增加沸石含量会降低 PlC-NZ 试样在固化早期的无侧限强度、弹性模量和峰值强度。然而,在后期,增加沸石含量会增加无侧限强度以及峰值强度和弹性模量。在硫酸根离子存在下固化的试样由于孔隙率较低而显示较低的渗透性、较高的无侧限强度、弹性模量和峰值强度。

更新日期:2022-01-27
down
wechat
bug