【摘要】 采用粉煤灰超量取代法配制再生混凝土,利用正交试验法分析了影响再生混凝土强度的主要因素。并选择了配制粉煤灰再生混凝土的较佳配合比。试验结果表明:在再生骨料掺量、粉煤灰取代水泥量、超代系数和水灰比4个因素中,对再生混凝土不同龄期抗压强度的影响顺序是不一样的,但是最主要的影响因素都是水灰比。经正交试验确定的较优配合比设计的混凝土和易性和强度均能满足一般工程的质量要求。更多还原

【Abstract】 Regenerated concrete is mixed by means of fly ash superscalar substitution method,the primary factor influencing regenerated concrete strength is researched by orthogonal test,the more excellent mix proportion is obtained to mix fly ash regenerated concrete.orthogonal test chooses four factors,they are regenerate aggregate poraver,fly ash substitution amount,coefficient of excess and water cement ratio.The result shows that influencing order is different for concrete strength at different age,but the most important factor of four factors which affect concrete strength is water cement ratio,The workability and strength of regenerated concrete mixed by the more excellent mix proportion can satisfy the quality request of general engineering.更多还原