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材料导报  2022, Vol. 36 Issue (Z1): 21120173-5    
  无机非金属及其复合材料 |
不同种类缓凝剂对半水磷石膏凝结时间和硬化性能的影响
王嘉昊1, 沈玉2, 刘娟红1,3,4, 罗昆1
1 北京科技大学土木与资源工程学院,北京100083
2 中交二公局第三工程有限公司,西安 710016
3 北京科技大学城市地下空间工程北京市重点实验室,北京 100083
4 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京 100083
The Influence of Different Kinds of Retarders on the Coagulation Time and Hardening Properties of Hemihydrate Phosphogypsum
WANG Jiahao1, SHEN Yu2, LIU Juanhong1,3,4, LUO Kun1
1 School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083,China
2 The Third Engineering Co., Ltd., CCCC Second Highway Engineering Co., Ltd., Xi'an 710016, China
3 Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing, Beijing 100083, China
4 Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083,China
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摘要 针对半水磷石膏凝结时间过快的问题,选取五种典型缓凝剂——柠檬酸、酒石酸、骨胶、葡萄糖酸钠及三聚磷酸钠,探究不同掺量的缓凝剂对半水磷石膏浆体标准稠度用水量、凝结时间和硬化体抗压强度、水化放热的影响。结果表明:掺入的五种缓凝剂都可以在不同程度上延长半水磷石膏的初凝时间、终凝时间,减少半水磷石膏的标准稠度用水量;在0.1%的低掺量情况下,缓凝效果最好的是酒石酸和葡萄糖酸钠,初凝时间、终凝时间都达到了未加入缓凝剂的空白试样的六倍以上,且 3 d、7 d龄期下强度损失率均在20%~30%之内;其中葡萄糖酸钠可使峰值放热速率降低22.1%,峰值速率出现时间延长一倍以上。综合考虑,酒石酸和葡萄糖酸钠可以延长半水磷石膏的凝结时间,降低水化放热速率,且硬化体的强度损失率较低。
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王嘉昊
沈玉
刘娟红
罗昆
关键词:  半水磷石膏  缓凝剂  凝结时间  强度损失  水化热    
Abstract: In order to solve the problem of too fast setting time of hemihydrate phosphogypsum, five typical retarders-citric acid, tartaric acid, bone glue, sodium gluconate and sodium tripolyphosphate were selected to explore the effects of different amount of retarder on the water consumption of standard consistency, setting time, compressive strength and hydration heat release of hemihydrate phosphogypsum paste. The results showed that the five retarders can prolong the initial setting time and final setting time of hemihydrate phosphogypsum and reduce the water consumption of standard consistency of hemihydrate phosphogypsum. In the case of 0.1% low content, tartaric acid and sodium gluconate have the best retarding effect, and the initial setting time and final setting time are more than 6 times that of the blank sample without retarder, and the strength loss rate is less than 20% to 30% in 3 d and 7 d. Among them, sodium gluconate can reduce the peak heat release rate 22.1%, and the occurrence time of the peak rate is more than doubled. Considering comprehensively, tartaric acid and sodium gluconate can prolong the setting time of hemihydrate phosphogypsum, reduce the hydration heat release rate, and the strength loss rate of hardened body is lower.
Key words:  hemihydrate phosphogypsum    retarder    coagulation time    strength loss    heat of hydration
出版日期:  2022-06-05      发布日期:  2022-06-08
ZTFLH:  TQ177.3  
基金资助: 国家自然科学基金(51834001); 中央高校基本科研业务费(FRF-BD-20-01A;FRF-BD-20-01B)
通讯作者:  juanhong1966@ hotmail.com   
作者简介:  王嘉昊, 2019年6月获沈阳建筑大学道路桥梁与渡河工程学士学位,现为北京科技大学土木与资源工程学院硕士研究生,主要研究领域为生态环保型高性能土木工程结构材料。
刘娟红,1985年9月—1989年7月,武汉工业大学硅酸盐专业,学士;1995年9月—1998年7月,武汉工业大学建筑材料专业,硕士;2006年3月—2009年1月,中国矿业大学(北京)矿物材料工程专业,博士。现为北京科技大学土木与资源工程学院教授。主要研究领域包括生态环保型高性能土木工程结构材料、新型混凝土材料及其环境行为与建筑物寿命分析和矿山充填用新型胶凝材料研究与应用。获国家发明专利6项。在公开刊物上发表文章150余篇,被SCI、EI收录50余篇。出版学术专著《绿色高性能混凝土技术与工程应用》《活性粉末混凝土》和《固体废弃物与低碳混凝土》,主编教材《土木工程材料》。
引用本文:    
王嘉昊, 沈玉, 刘娟红, 罗昆. 不同种类缓凝剂对半水磷石膏凝结时间和硬化性能的影响[J]. 材料导报, 2022, 36(Z1): 21120173-5.
WANG Jiahao, SHEN Yu, LIU Juanhong, LUO Kun. The Influence of Different Kinds of Retarders on the Coagulation Time and Hardening Properties of Hemihydrate Phosphogypsum. Materials Reports, 2022, 36(Z1): 21120173-5.
链接本文:  
http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2022/V36/IZ1/21120173
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