钢渣砂浆压敏性影响因素分析

确定制备方法和环境条件等因素对钢渣砂浆压敏性的影响规律，是利用钢渣砂浆机敏性的前提。采用模拟试验研究钢渣掺量、养护制度、龄期、含水率和温度对钢渣砂浆压敏性的影响规律，结果表明：随着水养时间的延长、钢渣掺量和含水率的增加，钢渣砂浆压敏性增强；随着龄期增长，钢渣砂浆的压敏性逐渐减弱，28d龄期时的压敏性比7d龄期时降低13．3％，超过28d龄期后压敏性趋于稳定；试件含水率处于面干状态至气干状态，或温度为5～25℃时，钢渣砂浆压敏性保持稳定，压敏性良好；含水率和温度对钢渣砂浆压敏性的影响较大，龄期的影响较小，而养护对压敏性的影响可以忽略。提高钢渣掺量，同时根据钢渣砂浆的含水率和环境温度选择应力一电阻变化率曲线，可以减少环境因素对钢渣砂浆压敏性的影响。

Parametric Analysis of Compression Sensitivity for Steel Slag Mortar

The rule of preparation methods and environment factors which influence the compression sensitivity was the prerequisite of utilizing the smart properties of SSM. Experiment test was carried out for the analysis of some factors that influence the compression sensitivity, including the steel slag content, curing regime, age. water content and temperature. It was found that the compressive sensitivity of SSM increased with the increase of steel slag content, water curing time and water content. And at early age, the compressive sensitivity of SSM decreased with the increase of age and the compressive sensitivity of SSM gradually stabilized after 28d age. When the water content was between surface drying condition and air seasoning condition or the temperature was between 5℃ and 25℃ , the compressive sensitivity of SSM kept stable. The dominant factors for the compression sensitivity were water content and temperature, followed with age, and the influence of curing regime could be neglected. The influence of environment factors on the compression sensitivity could be weaken with the increase of steel slag content and selecting the stress-resistivity change rate curve based on water content and temperature of SSM.