Mix Ratio Optimization Design and Synergistic Effect Study of Multi-Source Solid Waste Binders

Abstract

Abstract: The synergistic preparation of multi-source solid waste binders (MSSWB) using multiple solid wastes is an effective way to utilize solid waste resources. However, the relatively complex raw material composition and low mechanical properties limit the application of MSSWB. 100 sets of experimental mix ratios were designed as a data set with the help of D-optimal design method, then PSO-BP was created model for the prediction of the mechanical properties of MSSWB, and the optimal mix ratios of each raw material were determined by particle swarm optimization algorithm (PSO), and finally the hydration products of MSSWB products and the synergistic effect between multiple solid wastes were investigated by microscopic analyses such as XRD, TG-DTG and NMR. The results show that the PSO-BP model can effectively predict the compressive strength of binders, and the mix ratio strength after optimization by the particle swarm optimization algorithm is significantly higher than that of the unoptimized mix ratio strength, the 28 d compressive strength of the cementitious sand in the optimal mix ratio group is 20.8% higher than that of the unoptimized ratio group. The formation of the higher strength in the optimized mix ratio group is mainly related to the higher generation of hydration products of ettringite (AFt) and C-S-H gels. The formation of higher strength in the optimized mix ratio group is mainly related to the higher generation of the hydration products AFt and C-S-H gel and the higher cross-linking degree between the hydration products. This proves that the synergie is even more pronounced when the ratios of the raw materials are optimised.

Key words: binder, solid waste, D-optimal design, PSO-BP method, synergistic effect, mechanical property

CLC Number:

TU526

ZHU Zengchao, LIU Xianping, SHUI Zhonghe, GAO Xu, HUANG Yun, ZHENG Wu, GE Yexin. Mix Ratio Optimization Design and Synergistic Effect Study of Multi-Source Solid Waste Binders[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4368-4377.

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