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针对配制再生粗骨料取代率为30%和50%,同时分别掺入5%,10%,15%粉煤灰的C30再生混凝土试块,采用超声回弹综合法检测抗压强度,进行试验研究,推导出适用的测强公式。试验结果表明:其测强公式与粉煤灰再生混凝土抗压强度实测值具有较好的相关性;对同种配合比实体构件进行检测,利用推导的多项式回归方程计算结构实体构件强度,回归结果与实际符合较好。
For the preparation of recycled coarse aggregate replacement rate of 30% and 50%, respectively, while the incorporation of 5%, 10%, 15% fly ash C30 recycled concrete blocks, the use of ultrasonic rebound combined test compressive strength, the test Study, derived the applicable strength test formula. The test results show that the formula of strength measurement has a good correlation with the measured value of compressive strength of fly ash recycled concrete. The same kind of compounding solid components are tested, and the strength of structural solid components is calculated by using the derivation polynomial regression equation. In line with the actual good.