高温对高炉矿渣混凝土力学性能的影响试验研究

Experimental study on effect of high temperature on mechanical properties of blast furnace slag concrete

为了研究高温对含有高炉矿渣的混凝土的性能的影响,采用其占比分别为水泥质量的0,10%、30%、50%时,所制备混凝土试件在150~700℃下的高温试验,测定了混凝土的质量损失、碳化深度、残余抗压强度和弹性模量。结果表明,随温度升高,混凝土试样的质量损失和碳化深度逐渐增加,且矿渣掺杂量越多,质量损失和碳化程度越大。此外,混凝土试样的抗压强度和弹性模量随温度升高而降低,10%矿渣掺量的混凝土试样的相对抗压强度值最高,高掺量矿渣的相对弹性模量低于低掺量的混凝土试样。

In order to study the effect of high temperature on the properties of concrete containing ground blast furnace slag,the mass loss,carbonation depth,residual compressive strength and elastic modulus of concrete were measured at 150℃to 700℃when the proportion of ground blast furnace slag was 0,10%,30%and 50%respectively.The results show that the mass loss and carbonation depth of concrete samples increase with the increase of temperature,and the mass loss and degree of carbonation increase with the increase of slag content.In addition,the compressive strength and elastic modulus of concrete samples decrease with the increase of temperature.The relative compressive strength of concrete samples with 10%slag content is the highest,and the relative elastic modulus of concrete samples with high slag content is lower than that of concrete samples with low slag content.