Using microwave heating technology to assist concrete recycling have great potential for improve the quality of recycled concrete aggregate. Unfortunately, there are few studies explored on the properties of concrete incorporating microwave treated coarse aggregates. This study aims to investigate the performance of coarse aggregate after microwave treatment and to evaluate the properties of the resulting concrete incorporated microwave treatment aggregate. The water absorption and crushing value tests were carried out to study the effect of microwave heating treatment on the physical properties of coarse aggregates. Concrete incorporated aggregate with various microwave heating parameters was fabricated and tested. The results indicated that physical performance of microwave treated aggregate was within the range of specification requirement and water absorption and crushing value of coarse aggregate heated under low microwave power levels (2–3 kW) is very closed to the untreated samples, while coarse aggregates treated with high power levels showed a significant increase. It was also observed that concrete made out of low microwave power levels heated aggregates are able to achieve strength on par with natural coarse aggregate concrete. In addition, in case of similar strength, the elastic modulus of microwave treated aggregate concrete is similar to natural aggregate concrete. These results indicate that using low microwave power levels to assisted aggregates recycling can reduce the damage to coarse aggregates to some extent, which provide a further understanding for the application of microwave-assisted aggregates recycling.

使用微波加热技术来帮助混凝土回收利用，具有提高回收混凝土骨料质量的巨大潜力。不幸的是，很少有人研究掺入微波处理的粗骨料的混凝土的性能。这项研究的目的是调查微波处理后粗骨料的性能，并评估掺入微波处理骨料的混凝土的性能。进行了吸水和压碎值测试，以研究微波加热处理对粗骨料物理性能的影响。制备并测试了具有各种微波加热参数的掺入混凝土的骨料。结果表明，经微波处理的骨料的物理性能在规格要求范围内，在低微波功率水平（2-3 kW）下加热的粗骨料的吸水率和压碎值与未处理样品非常接近，而粗骨料经处理高功率水平显示出明显的增加。还观察到，由低微波功率水平的骨料制成的混凝土能够达到与天然粗骨料混凝土相同的强度。另外，在强度相似的情况下，微波处理的骨料混凝土的弹性模量与天然骨料混凝土相似。这些结果表明，使用较低的微波功率水平协助骨料回收，可以在一定程度上减少对粗骨料的破坏，