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材料导报  2022, Vol. 36 Issue (22): 20100061-7    https://doi.org/10.11896/cldb.20100061
  无机非金属及其复合材料 |
不同养护温度下SAP对水泥浆体水化动力学的影响
贺炯煌, 龙广成*, 常智杨, 杨智涵, 谢友均
中南大学土木工程学院,长沙 410075
Effect of SAP on the Hydration Kinetics of Cement Paste at Different Curing Temperature
HE Jionghuang, LONG Guangcheng*, CHANG Zhiyang, YANG Zhihan, XIE Youjun
School of Civil Engineering, Central South University, Changsha 410075, China
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摘要 养护温度会影响水泥基材料的水化动力学,也会影响高吸水树脂(SAP)的吸水与释水行为,同时水泥浆体中SAP的吸水与释水行为也会对水泥的早期水化动力学产生影响。然而,目前关于不同养护温度条件下SAP对水泥浆体水化动力学影响的研究还不多。为了更好地掌握不同养护温度条件下SAP对早期水泥浆体的水化动力学的影响,本工作研究了20 ℃、40 ℃及60 ℃下不同粒径的SAP对高水灰比(0.42)和低水灰比(0.30)水泥浆体早期水化动力学的影响。结果表明:在20 ℃和40 ℃下,与高水灰比浆体相比,SAP对低水灰比水泥浆体水化的影响更大。在60 ℃下,掺SAP会推迟水泥浆体水化放热峰值的出现时间,但会增大水化放热峰值。通过水化动力学分析发现,SAP对水泥浆体水化动力学的作用受养护温度、水灰比以及SAP的粒径等因素的影响。可见,养护温度和SAP对水泥浆体水化动力学的影响具有一定的协同作用。
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贺炯煌
龙广成
常智杨
杨智涵
谢友均
关键词:  高吸水树脂  水化  水化动力学  养护温度    
Abstract: The curing temperature will affect the hydration kinetics of cement, as well as the characteristics of water absorption and release of super absorbent polymer (SAP). At the same time, the water absorption and release of SAP in cement paste will also affect the hydration kinetics of cement. However, there are few studies on the effect of SAP on the hydration kinetics of cement paste at different curing temperatures. Therefore, the effect of SAP with different particle sizes on the hydration kinetics of cement paste with high water to cement ratio (HWC, W/C=0.42) and low water to cement ratio (LWC, W/C=0.30) at 20 ℃, 40 ℃ and 60 ℃ was investigated in this work. The results show that SAP has a greater effect on the hydration of LWC paste than that of HWC paste at 20 ℃ and 40 ℃. Meanwhile, the addition of SAP will delay the hydration of cement but increase the main hydration exothermic peak at 60 ℃. Through the analysis of hydration kinetics model, it is found that the effect of SAP on the hydration kinetics of cement paste is affected by the curing temperature, the water-cement ratio and the particle size of SAP. In summary, curing temperature and SAP have a synergistic effect on hydration kinetics of cement paste.
Key words:  super absorbent polymer    hydration    hydration kinetics    curing temperature
出版日期:  2022-11-25      发布日期:  2022-11-25
ZTFLH:  TU528  
基金资助: 国家自然科学基金(U1534207)
通讯作者:  * longguangcheng@csu.edu.cn   
作者简介:  贺炯煌,目前为中南大学土木工程学院博士研究生。主要从事早强水泥基材料相关的研究工作。
龙广成,中南大学土木工程学院教授、博士研究生导师。2004年于同济大学获得材料学博士学位。主要从事先进水泥基材料相关的研究工作。以第一或通讯作者发表SCI/EI论文80余篇,获专利授权14项,出版著作3部。曾获国家科技发明二等奖和国家科技进步二等奖。
引用本文:    
贺炯煌, 龙广成, 常智杨, 杨智涵, 谢友均. 不同养护温度下SAP对水泥浆体水化动力学的影响[J]. 材料导报, 2022, 36(22): 20100061-7.
HE Jionghuang, LONG Guangcheng, CHANG Zhiyang, YANG Zhihan, XIE Youjun. Effect of SAP on the Hydration Kinetics of Cement Paste at Different Curing Temperature. Materials Reports, 2022, 36(22): 20100061-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20100061  或          http://www.mater-rep.com/CN/Y2022/V36/I22/20100061
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