摘要
废旧轮胎橡胶颗粒直接掺入混凝土会大幅度降低混凝土强度。从橡胶颗粒表面改性的角度出发,研究不同改性方法对混凝土强度的影响,探讨改各自的改性机理。结果显示:无水乙醇、氢氧化钠和酸性高锰酸钾三种改性方法均能不同程度地改善橡胶集料混凝土的抗压强度和抗折强度,但改性机理存在差异;其中酸性高锰酸钾改性对橡胶集料混凝土抗压强度的改善效果最好,无水乙醇改性对抗折强度的改善效果最好,氢氧化钠改性具有工艺简单、经济实用的优点。
It is a generally accepted result that the inclusion of recycled tire rubber particles causes decrease in concrete strength. Effects of modification of recycled tire rubber particles on strength of concrete were investigated. The mechanism of reinforcing concrete by adding modified tire rubber powder was discussed. Dramatically, the strength of concrete with rubber particles modified by ethanol, sodium hydroxide solution and acidic potassium perman- ganate solution is greater than that of concrete with unmodified rubber particles, while the mechanism of three modifi- cation methods are different. The results also show that concrete with rubber particles modified by acidic potassium permanganate solution has the best compressive strength, and concrete with rubber particles modified by anhydrous ethanol has the best flexural strength. Besides, the method of modifying rubber particles with so-dium hydroxide me- thod is simple and economical.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2013年第24期113-116,共4页
Materials Reports
关键词
橡胶集料混凝土
废旧轮胎橡胶颗粒
改性方法
强度
作用机理
crumb rubber concrete, recycled tire rubber particle, modification method, strength, mechanism
