摘要:
为了缓解汽车旧轮胎堆积所带来的环境问题,将其磨细后制成橡胶粉加入水泥砂浆中以提高砂浆部分性能.在水泥砂浆中橡胶粉按照体积相同的原则替代部分砂,橡胶粉的粒径分别为60,80,100目,掺量取5%,10%,15%,20%.开展了砂浆基本力学强度、抗开裂性、耐磨性随橡胶粉掺量和粒径的变化规律研究,具有实际的工程意义.结果表明:橡胶粉粒径相同掺量0 ~ 15%时,砂浆基本强度呈线性降低的变化规律,韧性提高,抗开裂性和耐磨性明显提高;橡胶粉粒径相同掺量>15%时,砂浆强度急剧降低,耐磨性的改善效果降低,韧性和抗开裂性提高;橡胶粉掺量相同时,砂浆的基本力学强度、抗开裂性和耐磨性随粒径的减小有较小提高.%In order to alleviate the environmental problems caused by the accumulation of old tires,the rubber powder was added to the cement mortar to improve the performance of the mortar.The rubber powder in accordance with the principle of the same volume to replace part of the sand in the cement mortar,rubber powder particle size of60mesh,80mesh and 100mesh,the content was 5%,10%,15% and 20%.To explore the effect of the content and particle size of rubber powder on the basic mechanical strength,cracking resistance and wear resistance of mortar,which has practically significant to engineering applications.The results show that when the size of rubber powder same and the content of rubber powder is 0 ~ 15%,the strength of cement mortar decreases linearly,the toughness increases,and the crack resistance and wear resistance of cement was improved.When the size of rubber powders same and the content of rubber powder is more than 15%,the strength of cement mortar decreased sharply,the wear resistance decreased,toughness and crack resistance of cement increased.When the content of rubber powder same,with the rubber powder particle size decreases,the basic mechanical strength,crack resistance and wear resistance of cement mortar slightly improved.