矿物掺合料再生混凝土超声回弹法测强曲线试验

On strength-measuring curve experiment with mineral admixture regenerated concrete supersonic rebound method

通过对再生粗骨料取代率为60%,分别掺入矿粉、粉煤灰以及矿粉与粉煤灰(1∶1)双掺为10%,20%,30%的混凝土试件进行抗压强度试验,应用超声回弹检测其抗压强度,推出了超声回弹测强回归式,推动了再生混凝土无损检测技术的研究发展。

The paper undertakes the compressive strength test on the concrete specimen by mixing the mineral powder, the fly ash, and the min- eral powder and fly ash（ 1 ： 1 ） whose the double mixing are respectively 10% , 20% and 30%, and replacement ratio of regenerated coarse aggre- gate is 60%, adopts the supersonic rebound method to test its compressive strength, points out the strength-measuring regression equation, and the research development of the nondestruction test of the regenerated concrete.