The global trend towards carbon reduction,energy conservation,and sustainable use of resources has led to an increased focus on the use of waste sludge in construction.We used waste sludge from a reservoir to produce high-strength sintered lightweight aggregate,and then used the densified mixture design algorithm to create high-performance concrete from the sintered aggregate with only small amounts of mixing water and cement.Ultrasonic,electrical resistance and concrete strength efficiency tests were performed in accordance with ASTM(American Society for Testing and Materials)standards.In addition to the high workability,high quality and strengths of up to 10 000 Mpa,it was found that this concrete does not require special care. The results show that if both the quality and quantity of hydraulic grout are appropriate,the concrete has excellent fresh properties as well as ideal engineering properties.
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