An Investigation into the Performances of Cement Mortar Incorporating Superabsorbent Polymer Synthesized with Kaolin  

作　　者：Xiao Huang Jin Yang 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures,and School of Resources,Environment and Materials,Guangxi University,Nanning,530004,China [2]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China [3]School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan,430068,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第6期1393-1406,共14页流体力学与材料加工（英文）

基　　金：the National Natural Science Foundation of China(52172017 and 51902095).

摘　　要：Cement-based materials are fundamental in the construction industry,and enhancing their properties is an ongoing challenge.The use of superabsorbent polymers(SAP)has gained significant attention as a possible way to improve the performance of cement-based materials due to their unique water-absorption and retention properties.This study investigates the multifaceted impact of kaolin intercalation-modified superabsorbent polymers(K-SAP)on the properties of cement mortar.The results show that K-SAP significantly affects the cement mortar’s rheological behavior,with distinct phases of water absorption and release,leading to changes in workability over time.Furthermore,K-SAP alters the hydration kinetics,delaying the exothermic peak of hydration and subsequently modifying the heat release kinetics.Notably,K-SAP effectively maintains a higher internal relative humidity within the mortar,reducing the autogenous shrinkage behavior.Moreover,K-SAP can have a beneficial effect on pore structure and this can be ascribed to the internal curing effect of released water from K-SAP.

关 键 词：Superabsorbent polymer KAOLIN cement mortar rheological behavior autogenous shrinkage 

分 类 号：TU52[建筑科学—建筑技术科学]