着色剂对高流态水泥灌浆材料早期强度的影响机制  

Effect mechanism of colorant on the early-strength of high fluidity cement grouting materials

作　　者：陈净纯 赵泽栋 王健[1] 李敏[1] 任皎龙 CHEN Jingchun;ZHAO Zedong;WANG Jian;LI Min;REN Jiaolong(School of Architectural Engineering and Spatial Information,Shandong University of Technology,Zibo 255049,China;School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学建筑工程与空间信息学院,山东淄博255049 [2]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2023年第6期20-24,31,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51808326)。

摘　　要：高流态水泥灌浆材料(MG)是目前土木工程中最常用的加固材料之一。为了满足土木基础设施日益增长的功能要求,MG需添加着色剂来满足外观要求,然而现有研究表明着色剂对MG工程性能(尤其是早期强度)有负面影响。为了揭示着色剂对MG早期强度的影响机制,研究了MG在添加着色剂前后的宏观性能(抗压和抗折强度、流动性和干收缩率)变化规律,分析了不同龄期下的微观结构和水化产物特征,研究结果表明:着色剂阻碍了AFt和CH晶体的生成(特别是1 d和3 d),延缓了MG的水化过程,削弱了MG的早期强度;着色剂只影响MG的水化过程,而不会改变水化产物的类型。The high fluidity cement grouting material(MG)is one of the most commonly used reinforcement materials in civil engineering.The colorant was added to the MG for meeting the appearance requirements so as to adapt the increasing demand of multi-functional civil infrastructure.However,existing studies have shown that the colorant has a negative effect on the engineering performance of the MG,especially early strength.Therefore,in order to reveal the effect mechanism of colorant on the early strength of the MG,the changes of macro properties(compressive and flexural strength,fluidity and dry shrinkage)of the MG before and after adding colorant were studied,and the microstructure and hydration product characteristics at different ages were analyzed.Results show that the colorant hinders the generation of AFt and CH crystals(especially for 1-day and 3-day),which delays the hydration process and weakens the early strength of the MG.The colorant only affects the hydration process of the MG,but does not change the type of hydration product.

关 键 词：水泥灌浆材料 着色剂 微观结构 水化产物 早期强度 

分 类 号：TB532.1[理学—物理] TB553[理学—声学]