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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Influence of lye treatment on the determination of cementitious material content in hardened mortar

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碱液处理对硬化砂浆中胶凝材料质量分数测定的影响

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), May.2023, Vol.46 No.5: 609-615

DOI: 10.3969/j.issn.1003-5060.2023.05.006

Authors

ZHANG Yatao, ZHANG Chengyin, LIU Changshun, QIN Ling

(Anhui Province Water Conservancy Engineering Quality Inspection Center Station), Bengbu 233000, China)

Abstract and Keywords

Abstract: Based on the soluble $ SiO_{2} $ method for determining the content of cementitious material in hardened concrete, the effect of lye treatment on the determination of the cementitious material content in hardened mortar was studied via macroscopic tests and microscopic analyses. The results showed that the C-S-H gel that was not dissolved by the acid could be dissolved by the lye solution in the sample, and the erosion of the siliceous raw material by the lye solution was negligible; the testing errors were reduced by the lye treatment in the determination of the content of the cementitious material in the hardened mortar, and the lye treatment was one of the important factors affecting the testing results; the content of cementitious material (cement and mineral powder) in the hardened mortar with the admixture of fly ash and mineral powder could be measured more accurately by the soluble $ SiO_{2} $ method with lye treatment.

Keywords: hardened mortar; soluble $ SiO_{2} $ method; cementitious material content; microscopic morphology; lye treatment; macroscopic test

作者信息

张亚涛，张成银，刘长顺，秦岭

（安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站），安徽蚌埠 233000）

摘要和关键词

摘要: 基于测定硬化混凝土中胶凝材料质量分数的可溶性 $ SiO_{2} $ 法,文章结合宏观试验和微观分析,研究碱液处理对硬化砂浆中胶凝材料质量分数测定试验的影响,结果显示:碱液可进一步溶解未被酸液溶解的 C-S-H 凝胶,而其对硅质原材料的侵蚀可以忽略不计;碱液处理减小了硬化砂浆中胶凝材料质量分数测定试验的误差,是影响试验结果的重要因素之一;含有碱液处理步骤的可溶性 $ SiO_{2} $ 法,可以较准确地测出掺合料是粉煤灰和矿粉的硬化砂浆中胶凝材料(水泥和矿粉)的质量分数。

关键词: 硬化砂浆；可溶性 $ SiO_{2} $法；胶凝材料质量分数；微观形态；碱液处理；宏观试验

Funding

安徽省（水利部淮河水利委员会）水利科学研究院青年科技创新基金资助项目（KY201705）；安徽省水利厅科研及技术咨询资助项目（slkj2018-05）和安徽省（水利部淮河水利委员会）水利科学研究院科技攻关资助项目（KJGG201901）

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