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Abstract：
The purpose of this research is to investigate the utilization potential of recycled powder made from spent coffee grounds (SCGs) and aerated concrete blocks (ACBs) in green-growing concrete. The green-growing concrete is prepared using ACB powder and SCG ash as raw materials instead of 5%, 15%, and 25% and 5%, 10%, and 15% cement, respectively. Then, the two raw materials are compounded with the optimal content. The compressive strength and alkalinity of green-growing concrete at 7d and 28d and the frost resistance after 25 freeze-thaw cycles at 28d are studied. The results showed that the optimum content of ACB powder and SCG ash was 5%. Replacing 5% cement with recycled powder could improve the strength of concrete. The alkalinity of concrete containing ACB powder gradually increased, while the alkalinity of concrete containing SCG ash gradually decreased. The alkalinity of ACB-SCG powder was lower than that of ACB powder but slightly higher than that of SCG ash. The frost resistance of concrete containing ACB powder decreased gradually, and the frost resistance of concrete containing SCG ash increased first and then decreased greatly. The frost resistance of ACB-SCG powder could neutralize that of ACB powder and SCG ash.
摘要：
这项研究的目的是研究由废咖啡渣（SCG）和加气混凝土砌块（ACB）在绿色种植混凝土中制成的再生粉末的利用潜力。用ACB粉和SCG灰代替5%作为原料制备绿色生长混凝土，15%,25%和5%，10%,和15%的水泥，分别。然后，两种原料以最佳含量复合。研究了绿植混凝土在7d和28d时的抗压强度和碱度以及在28d时经过25次冻融循环后的抗冻性。结果表明，ACB粉和SCG灰分的最佳含量为5％。用再生粉代替5%水泥可以提高混凝土的强度。含ACB粉的混凝土碱度逐渐增加,而含SCG灰混凝土的碱度逐渐下降。ACB-SCG粉的碱度低于ACB粉，但略高于SCG灰。含ACB粉混凝土的抗冻性逐渐下降,含SCG灰混凝土的抗冻性呈先上升后下降的趋势。ACB-SCG粉的抗冻性可以中和ACB粉和SCG灰的抗冻性。
