葡萄糖酸钠对硫铝酸盐水泥水化历程的影响

doi:10.11896/cldb.21100182

材料导报

2023, Vol. 37

Issue (9): 21100182-6 https://doi.org/10.11896/cldb.21100182

无机非金属及其复合材料

葡萄糖酸钠对硫铝酸盐水泥水化历程的影响

廖宜顺^1,2,3,*, 王思纯¹, 廖国胜^1,2,3, 梅军鹏^1,2,3, 陈迎雪¹

1 武汉科技大学城市建设学院,武汉 430065
2 城市更新湖北省工程研究中心,武汉 430065
3 武汉科技大学高性能工程结构研究院,武汉 430065

Effect of Sodium Gluconate on Hydration Process of Calcium Sulfoaluminate Cement

LIAO Yishun^1,2,3,*, WANG Sichun¹, LIAO Guosheng^1,2,3, MEI Junpeng^1,2,3, CHEN Yingxue¹

1 School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
2 Hubei Provincial Engineering Research Center of Urban Regeneration, Wuhan 430065, China
3 Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China

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摘要本工作研究了不同掺量的葡萄糖酸钠对硫铝酸盐水泥浆体的凝结时间、抗压强度、水化热、电阻率、内部温度和水化产物的影响。结果表明:掺入葡萄糖酸钠后,水泥浆体的凝结时间延长,水化热与电阻率的发展延缓,硬化浆体的12 h抗压强度降低,但28 d抗压强度提高。当葡萄糖酸钠的掺量从0%增加到0.15%时,水泥浆体水化初期的水化热和电阻率均明显减小,表明水泥水化延缓,当其掺量增加到0.2%时,水泥浆体的24 h电阻率和3 d水化热均剧烈减小。掺入葡萄糖酸钠可促进β-C₂S的水化,但是使12 h水化产物钙矾石的热稳定性变差。

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关键词: 硫铝酸盐水泥葡萄糖酸钠水化热电阻率水化产物

Abstract: The effects of sodium gluconate (SG) on the setting time, compressive strength, heat of hydration, electrical resistivity, internal temperature, and hydration products of calcium sulfoaluminate cement (CSA) pastes were investigated. The results indicate that SG can prolong the setting time of cement pastes, delay the development of heat of hydration and electrical resistivity, decrease the compressive strength at 12 h, but increase the strength at 28 d. The heat of hydration and electrical resistivity during early hydration decreased with the increase of SG from 0% to 0.15%, which indicated that the cement hydration was delayed. Both the electrical resistivity at 24 h and the heat of hydration at 3 d were decreased significantly when the dosage of SG reached 0.2%. The addition of SG can promote the hydration of β-C₂S, but decrease the thermal stability of ettringite at 12 h.

Key words: calcium sulfoaluminate cement sodium gluconate heat of hydration electrical resistivity hydration product

出版日期: 2023-05-10 发布日期: 2023-05-04

ZTFLH:

TQ172

基金资助: 国家自然科学基金 (51608402);长江科学院开放研究基金 (CKWV2019756/KY)

通讯作者: *廖宜顺,武汉科技大学城市建设学院副教授、硕士研究生导师。2007年河北工业大学环境工程专业学士毕业,2013年华中科技大学结构工程专业博士毕业。2013年7月至今于武汉科技大学任教。目前主要从事新型水泥材料、混凝土结构材料、固体废物资源化利用等方面的研究工作。主持国家自然科学基金项目等科研项目10项。发表学术论文60余篇,其中SCI、EI收录20余篇。liaoyishun@wust.edu.cn

引用本文:

廖宜顺, 王思纯, 廖国胜, 梅军鹏, 陈迎雪. 葡萄糖酸钠对硫铝酸盐水泥水化历程的影响[J]. 材料导报, 2023, 37(9): 21100182-6.
LIAO Yishun, WANG Sichun, LIAO Guosheng, MEI Junpeng, CHEN Yingxue. Effect of Sodium Gluconate on Hydration Process of Calcium Sulfoaluminate Cement. Materials Reports, 2023, 37(9): 21100182-6.

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http://www.mater-rep.com/CN/10.11896/cldb.21100182 或 http://www.mater-rep.com/CN/Y2023/V37/I9/21100182

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