气温和水温对静态破碎剂膨胀性能影响的试验分析

Test and Analysis on Air Temperature and Water Temperature for Expansion Performance of Static Cracking Agent

为研究水剂比、气温和水温对静态破碎剂膨胀性能的影响,进行了相同条件下5种水剂比和水剂比为0.30时6种气温与3种水温下静态破碎剂的膨胀性能试验,得到了相应条件下的体积膨胀率和拌合物温度-时间曲线。试验结果表明:静态破碎剂膨胀可分为拌合物硬化、裂纹扩展、体积快速膨胀和膨胀速度减慢四个过程。拌合物温度-时间曲线分为温度迅速上升、恒温、继续上升和下降四个阶段。通过对比不同水剂比的体积膨胀率,得出水剂比为0.30时膨胀效果较好;气温为16℃时体积膨胀率较好;采用高水温拌合可加快静态破碎剂的膨胀过程。

In order to study the effect of water agent ratio,air temperature and water temperature on the expan-sion performance of static cracking agent,the expansion performance experiments with 5 kinds of water agent ratios in the same condition were conducted and expansion performance experiments with water agent ratio of 0. 30 in 6 kinds of air temperatures and 3 kinds of water temperatures were also carried out,then corresponding volume expansion ra-tios and mixture temperature-time curves were obtained. The test results showed that the expansion process of static cracking agent could be divided into four phases：mixture hardening,crack growth,rapid volume expansion and slow volume expansion. The mixture temperature-time curve could also be divided into four stages：fast temperature as-cending,temperature keeping constant,temperature raising and temperature descending. When considering the vol-ume expansion ratio,water agent ratio of 0. 30 was much better than other water agent ratios. The volume expansion ratio in air temperature of 16℃ was much better than other conditions. The high temperature water would accelerate expansion process.