摘要
为了研究低水胶比下掺玻璃粉水泥浆的浆体力学性能和活性,运用活性因子法排除干扰因素,探讨了低水胶比对不同掺量玻璃粉水泥浆强度的影响规律。结果表明:水化反应早期,玻璃粉的微集料效应与密实填充占据主要地位,玻璃粉的火山灰效应忽略不计。有效水灰比随玻璃粉掺量增加而增加,玻璃粉-水泥浆体中的Ca^(2+)浓度降低,生成的C—S—H凝胶数量相对减少,整个复合体系之间的黏结力下降,玻璃粉与水泥的界面效应也相应减弱,从而引起玻璃粉-水泥硬化浆体的抗压强度降低。
To study activation and mechanical properties of cement paste with glass powder under low water-cement,the interference factors are eliminated by activity factor analysis,discuss on the law of strength influence of cement paste with different replacement of glass powder under low water-cement ratio.The results indicated that the dense packing and micro-aggregate effect of glass powder play an important role in the early days of hydration reaction,but the pozzolanic effect of glass powder can be almost neglected.The effectively water-cement increase with the quantity of glass powder increasing,and caused Ca2＋ concentration of glass-powder paste decrease,generated quantity of C-S-H gel were decreased, not only reduce cohesive force between whole composite system,but also relatively weakly interface effect of glass powder and cement,and then induce compressive strength of glass powder-cement hardened paste decrease.
出处
《科学技术与工程》
北大核心
2017年第20期241-246,共6页
Science Technology and Engineering
基金
国家自然科学基金(51468014)
桂林理工大学博士项目启动基金、桂林理工大学创新项目(SS201604)
有色金属15-012项目(002501215078)
广西有色金属及特色材料加工国家重点实验室培育基地开放基金(001102215021)
广西教育厅经费(002501216035)资助
关键词
玻璃粉
微观结构
低水胶比
力学性能
活性
glass powder
microstructure
low water-cement ratio
mechanical properties
activation
