Effect of Calcined MgO-rich Byproduct from the Extraction of Li2CO3 on the Performance of Magnesium Phosphate Cement

被引：6

作者：

Chen, Wenhai ^{[1
]}

Wu, Chengyou ^{[1
]}

Yu, Hongfa ^{[2
]}

Chen, Yuanji ^{[1
]}

Zheng, Shuhai ^{[1
]}

机构：

[1] Qinghai Univ, Sch Civil Engn, Xining, Qinghai, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Dept Civil Engn, Nanjing, Jiangsu, Peoples R China

来源：

JOURNAL OF ADVANCED CONCRETE TECHNOLOGY | 2017年 / 15卷 / 12期

关键词：

CHEMICALLY BONDED CERAMICS; CALCINATION TEMPERATURE; MECHANICAL-PROPERTIES; RAPID REPAIR; BORIC-ACID; CONCRETE; MORTAR; OXIDE;

D O I：

10.3151/jact.15.749

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Magnesium phosphate cement was prepared with an MgO-containing byproduct (EL-MgO) obtained through the extraction of Li2CO3 from salt lakes, and was used to replace dead burnt MgO in magnesium phosphate cement (MPC) formulations. The properties of EL-MgO after calcination at various temperatures were investigated. Changes in pH, alternating-current impedance, and hydration-heat-release rate were assessed. Surface area and reactivity decreased while the degree of crystallization increased with increasing calcination temperature, resulting in longer setting times. The compressive strength of MPC prepared with EL-MgO calcined at 1000 degrees C was 53.9 MPa after 1 day, which is high for quick-repair materials.

引用

页码：749 / 759

页数：11

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