轴向压力作用下钢渣混凝土的压敏性研究

Investigation on the strain sensitivity of steel slag concrete under axial load

在不同加载速率、突然加载和卸载以及三向约束等加载条件下,钢渣混凝土具有良好的导电性和压敏性,随着钢渣掺量的增加,钢渣混凝土的压敏效应更加明显;施加压力较小时,电阻率随压力增大而迅速降低;压力增大到一定程度后,电阻率下降十分缓慢;压力达到极限荷载时,电阻率迅速升高;受到三向约束时;钢渣混凝土仍然具有压敏特性,相对于单轴受压,其压力敏感性较低。

Under the circumstances of different load speed, abrupt load, abrupt unload and three sides press, the steel slag concrete has favorable conductivity and compression sensitivity. The pressure sensitivity of concrete boost up with the increase of steel slag. When the load is lower, resistivity depresses rapidly with the increment of loads then the load increases continually, where as resistivity decreases slowly; ultimately the load arrives limited value,resistivity increases rapidly even if the load sustains invariable. When the specimens endure three sides press, steel slag concrete has compression sensitivity, however the compression sensitivity is lower than the specimens which endure monaxial load.