自燃煤矸石陶粒作为骨料制备喷射混凝土试验研究

Test study on preparation sprayed concrete with spontaneous combustion gangue as aggregate

为了对采用自燃煤矸石取代砂石作为骨料配制喷射混凝土的可行性进行研究,通过采用试验的方法优化自燃煤矸石骨料级配,比较外加剂、I级粉煤灰、水泥用量等对所配混凝土强度及性能的影响,确定配制C20自燃煤矸石骨料喷射混凝土的最佳配合比。结果表明:在掺加速凝剂情况下,配制同标号混凝土采用自燃煤矸石骨料取代砂石骨料可以大幅降低水泥用量。

In order to study the feasibility of preparation sprayed concrete by adopting spontaneous combustion gangue to replace sand as aggregate, by optimization spontaneous combustion gangue aggregate gradation,comparing the strength and performance influence of the concrete under the condition of admixtures, I grade fly ash,cement content , the best mixture ratio which can make sprayed concrete with spontaneous combustion gangue isdetermined. The result shows that In adding herein cases, mixing concrete with label by spontaneous combustion gangue aggregate replace sand aggregate can dramatically reduce dosage of cement.