Effect of Sodium Silicate on the Hydration of Alkali-Activated Copper-Nickel Slag Materials

被引：2

作者：

Yang, Jie ^{[1
]}

Zhang, Tingting ^{[1
]}

Guo, Lijie ^{[2
,3
]}

Zhi, Shiwei ^{[1
]}

Han, Junnan ^{[1
]}

机构：

[1] Dalian Univ Technol, Fac Infrastructure Engn, Dalian 116023, Peoples R China

[2] Beijing Gen Res Inst Min & Met, Beijing 100160, Peoples R China

[3] Natl Ctr Int Res Green Met Min, Beijing 102628, Peoples R China

来源：

METALS | 2023年 / 13卷 / 03期

基金：

中国国家自然科学基金;

关键词：

copper-nickel slag; alkali-activated materials; sodium silicate; hydration; DISSOLUTION;

D O I：

10.3390/met13030596

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper studied the influence of the modulus and dosage of sodium silicate on the hydration of alkali-activated copper-nickel slag (CNS) materials. CNS was used as the main raw material, and ground granulated blast furnace slag (GBFS) powder was selected as the mineral additive. The hydration and hardening mechanisms were discussed. The experimental results showed that [SiO4](4-) and [AlO4](5-) with a high degree of polymerization in the CNS glassy phase more easily underwent depolymerization-condensation and produced more C-S-H gels when the modulus was small and the sodium silicate dosage was high. When the content of sodium silicate was 7.0% and the modulus of sodium silicate solution was 1.0, the 28-day compressive strength of the material reached 125 MPa. This alkali-activated copper-nickel slag material can be used for mine filling, which has certain economic and ecological benefits.

引用

页数：14

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