湖南大学学报（自然科学版）2023，Vol.50Issue(12)：102-111,10.DOI:10.16339/j.cnki.hdxbzkb.2023311
纳米偏高岭土水泥浆在水化早期的内部结构建立
The Internal Structural Build-up of Cement Paste with Addition of Nano-Metakaolin in Early Hydration
摘要
Abstract
Considering the effects of water to binder ratio(0.40,0.45,0.50),NMK contents(0,1％,3％,5％,7％),superplasticizer dosage(0,0.04％,0.08％,0.12％)and temperature(10℃,20℃,30℃,40℃),the static yield stress test method and small amplitude oscillation shear test method were used to obtain the parameters of static yield stress and storage modulus of nano-metakaolin(NMK)cement paste.The internal structural build-up of NMK cement paste in early hydration(10～90 min)was discussed by the evolution of static yield stress and storage modulus with time.The test results show that NMK promote the internal structural build-up of cement paste in the early hydration period.Within 90 min of cement hydration,the average growth rate of static yield stress of 3％NMK cement paste was about twice that of ordinary cement paste;the average growth rate of storage modulus of 7％NMK cement paste was about 4 times that of ordinary cement paste.The higher the water to binder ratio or the higher the superplasticizer content,the lower the growth rate of internal structural build-up of NMK cement paste;NMK accelerates the build-up of internal structure of cement paste in different temperature environment;an increasing temperature increases the growth rate of static yield stress and storage modulus of NMK cement paste.关键词
纳米偏高岭土/水泥浆/结构建立/静态屈服应力/储能模量Key words
nano-metakaolin/cement pastes/structural build-up/static yield stress/storage modulus分类
土木建筑引用本文复制引用
李秋超,范颖芳..纳米偏高岭土水泥浆在水化早期的内部结构建立[J].湖南大学学报（自然科学版）,2023,50(12):102-111,10.基金项目
国家自然科学基金资助项目(51578099),National Natural Science Foundation of China(51578099) （51578099）
