铜矿废石机制砂吸附行为及与聚羧酸减水剂作用效率研究

doi:10.11896/cldb.25030086

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Abstract The utilization of copper mine tailings to produce manufactured sandcan facilitate resource recycling. In this work, the petrographic distribution of manufactured sand derived from phyllite-type and porphyry-type copper mine tailings was first analyzed, the effect of the powder type and content on the rheological behavior of cement mortar was identified, and the adsorption behavior and efficiency of polycarboxylate superplasticizers (PCE) was further investigated. The results indicate that phyllite-type and porphyry-type copper mine tailings have better water absorption ability and higher MB values compared to river sand powders. With equal powder dosage, PCE performance is lowest in phyllite-type aggregates, intermediate in porphyry-type, and highest in river sand. The mineral composition of the manufactured sand powder between gangue phases and metallic phases significantly affects the efficiency of PCE. Notably, in the case of phyllite-type stone powder, its higher clay mineral content and stronger anionic strength in the cement liquid phase induce aggregation with competitive and intercalation adsorption, thereby undermining the dispersion efficiency of PCE.

Key words： copper mine tailings manufactured sand polycarboxylate superplasticizer adsorption behavior

Published: 10 January 2026 Online: 2026-01-09

CLC number:

TU521.1

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	YUAN Qiang

Cite this article:

YUAN Qiang. Study of Adsorption Behavior of Copper Mine Tailings-based Manufactured Sand and Its Interaction Efficiency with Polycarboxylate Superplasticizer[J]. Materials Reports, 2026, 40(1): 25030086-6.

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https://www.mater-rep.com/EN/10.11896/cldb.25030086 OR https://www.mater-rep.com/EN/Y2026/V40/I1/25030086

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