Effect of Plasticizing and Retarding Admixtures on the Properties of High Strength Concrete

Markiv, Taras; Solodkyy, Sergii; Sobol, Khrystyna; Rachidi, Djire

doi:10.1007/978-3-030-57340-9_35

Cited by 9 publications

(1 citation statement)

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“…Zeolite has gained attention in recent years as a lightweight aggregate for the interior maintenance of ECC [ 17 , 18 , 19 ]. Natural zeolite, with its porous framework structure, can adsorb water up to 30% of its own weight [ 20 ] while reducing the density of cementitious materials. In this study, zeolite is utilized as a lightweight aggregate in LECC to modulate shrinkage, leveraging its inherent advantages.…”

Section: Introductionmentioning

confidence: 99%

Development of a Low-Shrinkage-Lightweight Engineered Cementitious Composite Based on Heavily Doped Zeolites

Wang,

Guo,

Guan

et al. 2023

Polymers

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In recent years, there has been a growing utilization of lightweight engineered cementitious composites (LECC) for the reinforcement and restoration of contemporary building structures. This study focuses on the incorporation of zeolite, serving as an internal reservoir for moisture maintenance, and examines its impact on various performance indicators, including apparent density, compressive strength, tensile strength, and autogenous shrinkage. Additionally, the influence of zeolite on the tensile and ductile properties of LECC is elucidated with the aid of scanning electron microscopy (SEM). The findings reveal that the addition of zeolite enables the preservation of excellent mechanical properties of LECC while further reducing its density. Notably, the introduction of a substantial amount of zeolite leads to a decrease in matrix density, average crack width, and ultimate tensile strain. The ultimate tensile strain exceeds 8% to reach 8.1%, while the decrease in compressive and tensile strengths is marginal. Zeolite’s internal curing capability facilitates the complete hydration of unhydrated cement, concurrently alleviating the autogenous shrinkage of LECC. Consequently, the durability and reliability of the material are enhanced. The ability of zeolite, with its porous framework structure, to significantly improve the ultimate tensile strain of the matrix can be attributed to the amplified occurrence of active defects and a shift in the pull-out mode of PE fibers from “pull-out” to “pull-through”. This study presents a promising alternative material in the field of engineering, holding potential for diverse building and infrastructure projects, as it enhances their durability and reliability.

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