真空热处理对橡胶砂浆强度影响  

Effect of Vacuum Heat-treatment on the Strength of Rubberized Mortar

作　　者：张海波[1] 丁雪晨[1] 徐自立[1] 王军军[1] 张仪华[1] 秦文轩 管学茂[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《硅酸盐通报》2016年第5期1637-1641,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然基金(U1204513)

摘　　要：目前,提高橡胶混凝土力学性能的措施主要是对橡胶颗粒进行表面改性。在本研究中,通过真空热处理(vacuum heat-treatment,VHT)的方法来提高橡胶砂浆的力学性能。结果表明:经过真空热处理后,橡胶砂浆的抗折、抗压强度提高。掺入用NaOH溶液预处理后的橡胶颗粒,砂浆强度提高更加显著。这是由于橡胶颗粒在一定温度下会部分分解,而分解产物改善了橡胶颗粒与水泥之间的粘结。NaOH对橡胶颗粒的热分解起到催化作用。橡胶颗粒越小,越容易分解。The previous methods of improving the strength of rubberized concrete are surface modifications of the rubber particles. In this paper,the vacuum heat-treatment（ VHT） method is used to improve the strength of rubberized mortar. The obtained results show that the VHT can raise the flexural and compressive strength of rubberized mortars. The rising are more obvious on the rubberized mortars incorportiating pretreated rubber particles with NaOH or smaller size rubber particles. The reasons may be that the rubber will partially decompose at heat-treatment temperature and the decomposition products can enhance the adhesion between rubber and cement,the NaOH can catalyze the decomposition of rubber,and the smaller rubber particle is easier to decompose.

关 键 词：橡胶砂浆 真空热处理 抗折强度 抗压强度 分解 

分 类 号：TU528[建筑科学—建筑技术科学]