Mechanical Behavior and Permeability of Plastic Concrete Containing Natural Zeolite under Triaxial and Uniaxial Compression

被引:79
作者
Akbarpour, Ali [1 ]
Mahdikhani, Mahdi [1 ]
Moayed, Reza Ziaie [1 ]
机构
[1] Imam Khomeini Int Univ, Dept Civil Engn, Qazvin 3414916818, Iran
关键词
Plastic concrete (Pl-C); Sulfate resistance; Natural zeolite (Pl-CZ); Triaxial compression test; Scanning electron microscopy (SEM); Permeability; SULFATE ATTACK; POZZOLAN CEMENT; EARLY HYDRATION; STRENGTH; RESISTANCE; REDUCTION; EXPANSION; BENTONITE; MORTAR; MICRO;
D O I
10.1061/(ASCE)MT.1943-5533.0004093
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper represents a series of laboratory tests to illustrate the effects of natural zeolite and sulfate environment on the mechanical behavior, hydraulic properties, and microstructure of plastic concrete. Plastic concrete (Pl-C) is comprised of cement, water, aggregate, and bentonite. Because cement production is responsible for a significant amount of carbon dioxide emissions into the atmosphere, cement was replaced in five different percentages of 0%, 10%, 15%, 20%, and 25% by natural zeolite (Z). Moreover, all the specimens were cured in chambers simulating sulfate attack. The mechanical behavior of plastic concrete containing natural zeolite (Pl-CZ) was studied using a series of confined and unconfined compression tests. Hydraulic properties were evaluated using three different confining pressures of 200, 350, and 500 kPa. Scanning electron microscopy (SEM) images were utilized to explore the microstructure of Pl-CZ specimens. The test results show that, although increasing the zeolite content decreased the unconfined strength, peak strength, and the elastic modulus in the early ages, at the later ages, it increased the unconfined strength as well as the peak strength and the elastic modulus, while it decreased the permeability. As illustrated in SEM images, specimens cured in the sulfate environment indicated lower porosity which led to having higher unconfined strength, elastic modulus, and peak strength, along with lower permeability.
引用
收藏
页数:10
相关论文
共 56 条
[51]   Plastic concrete for cut-off walls: A review [J].
Shepherd, David Alos ;
Kotan, Engin ;
Dehn, Frank .
CONSTRUCTION AND BUILDING MATERIALS, 2020, 255
[52]   New cements for the 21st century: The pursuit of an alternative to Portland cement [J].
Shi, Caijun ;
Fernandez Jimenez, A. ;
Palomo, Angel .
CEMENT AND CONCRETE RESEARCH, 2011, 41 (07) :750-763
[53]   The Formation of Microstructure in High Strength Concrete Containing Micro and Nanosilica [J].
Toropovs, Nikolajs ;
Bajare, Diana ;
Sahmenko, Genadijs ;
Krage, Linda ;
Korjakins, Aleksandrs .
ENGINEERING MATERIALS & TRIBOLOGY XXII, 2014, 604 :83-+
[54]   INFLUENCE OF CADMIUM ON THE HYDRATION OF C3A [J].
TUMIDAJSKI, PJ ;
THOMSON, ML .
CEMENT AND CONCRETE RESEARCH, 1994, 24 (07) :1359-1372
[55]  
XIE P, 1992, CEMENT CONCRETE RES, V22, P631
[56]   Understanding of the deterioration characteristic of concrete exposed to external sulfate attack: Insight into mesoscopic pore structures [J].
Zhang, Zhongya ;
Zhou, Jianting ;
Yang, Jun ;
Zou, Yang ;
Wang, Zongshan .
CONSTRUCTION AND BUILDING MATERIALS, 2020, 260