摘要
系统地研究了硅粉、矿渣粉、粉煤灰等掺合料及引气剂对混凝土力学性能、抗冻性能及抗氯离子渗透性能的影响。研究结果表明:混凝土中适当引气可以改善混凝土的耐久性能,但随着含气量的增加混凝土强度呈递减趋势;掺合料可改善混凝土的物理力学性能、抗冻性能及抗氯离子渗透性能;掺合料与引气剂搭配,可发挥材料的叠加效应,使混凝土的力学性能和综合耐久性提高,是高寒地区混凝土配制的较佳途径。
The effects of admixtures and air entraining agent on mechanical property,frost resistance and resistance to chloride-ion penetration of concrete are investigated.The results show that,proper air content can improve the durability of concrete,but concrete strength decreases with increasing air content;Admixtures,including silica fume,slag and fly-ash,can improve the mechanical property,frost resistance and resistance to chloride-ion penetration;Combining admixtures with air entraining agent,the cumulative effect of materials is generated to improve the mechanical property and durability of concrete,which is a better way to be adopted in severe cold district.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第9期80-82,共3页
Concrete
基金
西藏交通厅科技攻关项目"西藏高寒地区提高桥梁结构混凝土耐久性关键技术研究"(2008005)
关键词
混凝土
掺合料
含气量
抗冻性能
抗氯离子渗透性能
concrete
admixtures
air content
frost resistance
resistance to chloride-ion penetration
