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[1]乾学晨,莫立武,徐翊馨.高镁卤水合成Mg(OH)2及其碳化制备胶凝材料的抗压强度[J].南京工业大学学报(自然科学版),2018,40(05):54-59.[doi:10.3969/j.issn.1671-7627.2018.05.009]
 QIAN Xuechen,MO Liwu,XU Yixin.Carbonation of Mg(OH)2 synthesized from saline solution and compressive strength of magnesium carbonate binders[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2018,40(05):54-59.[doi:10.3969/j.issn.1671-7627.2018.05.009]
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高镁卤水合成Mg(OH)2及其碳化制备胶凝材料的抗压强度()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
40
期数:
2018年05期
页码:
54-59
栏目:
出版日期:
2018-09-20

文章信息/Info

Title:
Carbonation of Mg(OH)2 synthesized from saline solution and compressive strength of magnesium carbonate binders
文章编号:
1671-7627(2018)05-0054-06
作者:
乾学晨莫立武徐翊馨
南京工业大学 材料科学与工程学院 材料化学与工程国家重点实验室,江苏 南京 210009
Author(s):
QIAN XuechenMO LiwuXU Yixin
State Key Laboratory of Materials-Oriented Chemical Engineering,College of Materials Science and Engineering, Nanjing Tech University,Nanjing 210009,China
关键词:
盐湖卤水 CO2养护 碳酸盐胶凝材料 抗压强度
Keywords:
saline solution CO2 curing carbonate binders compressive strength
分类号:
TB321
DOI:
10.3969/j.issn.1671-7627.2018.05.009
文献标志码:
A
摘要:
为资源化利用盐湖提钾工业副产品MgCl2卤水,利用盐湖副产品中MgCl2制备低碳和高强的胶凝材料。采用Ca(OH)2与MgCl2反应生成Mg(OH)2,进而与粉煤灰按不同比例混合后压制成35 mm×25 mm×25 mm试件,经CO2碳化养护制备碳酸盐胶凝材料,研究碳化养护对胶凝材料强度的影响。结果表明:经碳化养护后试件的抗压强度显著提高。碳化1 d后,掺20%Mg(OH)2试件的抗压强度为39.80 MPa,而掺40%Mg(OH)2试件的抗压强度达131.30 MPa。随着碳化时间的延长,试件的抗压强度不断增大,碳化14 d后,掺20%和40%Mg(OH)2试件的抗压强度比碳化1 d分别提高了9.90和42.20 MPa。
Abstract:
To effectively utilize magnesium resource contained in saline brine,a potential approach of preparing low-carbon and high strength magnesium carbonate binders by using the MgCl2 contained in the saline solution,a byproduct of potassium salt industry,was investigated.Mg(OH)2 was precipitated by reacting Ca(OH)2 with MgCl2 from saline solution.The Mg(OH)2 and fly ash were mixed and used to prepare compacted specimens with size of 25 mm×25 mm width and 35 mm height under pressure with Mg(OH)2 contents of 20% and 40% respectively.The compacted specimens were exposed to CO2 to prepare magnesium carbonate binders,and then the influences of carbonation on the compressive strength of compacted specimens were examined.Results showed that the compressive strengths of the compacted specimens increased significantly after the carbonation curing,the compressive strength of specimens consisting of 80% fly ash and 20% Mg(OH)2 was increased to 39.80 MPa,and the compressive strength of the specimens consisting of 60% fly ash and 40% Mg(OH)2 was increased to 131.30 MPa after 1 d of carbonation.With the increasing carbonation time,the compressive strengths of specimenswas increased.The compressive strengths of specimens containing 20% and 40% Mg(OH)2 after 14 d of carbonation were increased by 9.90 MPa and 42.20 MPa,respectively,in comparison to that after only 1 d of carbonation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-03-16
基金项目:江苏省普通高校研究生实践创新计划(SJLX15_0335)
作者简介:乾学晨(1992—),女,安徽芜湖人,硕士,主要研究方向为含镁废弃物资源化利用、CO2利用与低碳胶凝材料; 莫立武(联系人),副教授,E-mail:andymoliwu@njtech.edu.cn.
引用本文:乾学晨,莫立武,徐翊馨.高镁卤水合成Mg(OH)2及其碳化制备胶凝材料的抗压强度[J].南京工业大学学报(自然科学版),2018,40(5):54-59..
更新日期/Last Update: 2018-09-30