摘要
研究了纳米SiO2(NS)对大掺量粉煤灰水泥(HVFAC)净浆试件力学与吸水性能的影响,并借助扫描电镜与X射线衍射仪分析了试件微观结构与矿物组成。结果表明:NS提高了HVFAC试件的力学性能,且NS掺量越多,增强作用越明显。同时,NS降低了HVFAC试件的吸水性能。NS不仅加速了水泥水化,也加速了粉煤灰水化,生成更多水化产物;NS与氢氧化钙发生反应也生成了更多水化硅酸钙(C-S-H)凝胶,使得材料更为致密,因此其力学性能增加,吸水性能降低。
The effect of nano-SiO2(NS)on mechanical and water absorption properties of high-volume fly ash cement(HVFAC)pates were studied,and the microstructure and mineral composition of specimens were analyzed through scanning electron microscopy and X-ray diffraction.The results show that NS improves the mechanical properties of HVFAC specimens,and the improvement increases with the increase of NS content.Meanwhile,NS reduces the water absorption property of HVFAC specimens.NS accelerates not only the cement hydration,but also the hydration of fly ash,generating more hydration products;NS reacts with calcium hydroxide to produce more C-S-H gels and thereby make the specimens more compact,thus increasing their mechanical properties and decreasing their water absorption.
作者
黄谦
唐帅
陈以波
犹娅
田锐
邓海森
Huang Qian;Tang Shuai;Chen Yibo;You Ya;Tian Rui;Deng Haisen(School of Civil and Architectural Engineering,Yangtze Normal University,Chongqing 408100)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第2期38-40,83,共4页
Non-Metallic Mines
基金
国家自然科学基金(51572038)
重庆市自然科学基金(cstc2019jcyj-msxmX0508)
教育部“春晖计划”合作科研项目
重庆市大学生创新创业训练计划项目(S201910647022)。
