Mixture Ratio of Lithium Slag-Based Controllable Low Strength Materials Based on Orthogonal Experiment

Abstract

Abstract: In this paper, controlled low strength material (CLSM) was prepared from lithium slag. Based on the single factor test, the effects of cement content, water-binder ratio and water-reducing agent content on flexural strength, compressive strength, fluidity and bleeding rate of lithium slag-based CLSM were investigated by orthogonal test. The results show that the water-binder ratio and the amount of superplasticizer have significant effects on fluidity and bleeding rate of the materials. In CLSM system with large amount of lithium slag, the cement content has little effect on the bleeding rate, and increasing the cement content would increase the compressive strength and flexural strength of CLSM. Comparing the influence of various factors on CLSM, the suitable mix ratio to meet the requirements of CLSM performance index is as follows: cement content 12% (mass fraction, same below), lithium slag content 88%, water-binder ratio 0.57, water reducer content 0.20%. At this time, the fluidity of CLSM is 231 mm, the bleeding rate is 1.49, the 28 d flexural strength can reach 1.74 MPa, and the 28 d compressive strength is 4.90 MPa. All indicators are excellent.

Key words: lithium slag, controlled low strength material, mechanical property, fluidity, bleeding rate, orthogonal experiment

CLC Number:

TU526

LIU Rui, LIU Ze, ZHAO Lijie, ZHANG Shuai, WANG Dongmin. Mixture Ratio of Lithium Slag-Based Controllable Low Strength Materials Based on Orthogonal Experiment[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2548-2555.

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