| 一种新型缓凝剂的制备及其在水泥基复合材料中的应用 |
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| 引用本文： | 李均星,郭锦棠,张弛,李鹏鹏.一种新型缓凝剂的制备及其在水泥基复合材料中的应用[J].化工进展,2019,38(6):2953-2960. |
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| 作者姓名： | 李均星 郭锦棠 张弛 李鹏鹏 |
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| 作者单位： | 天津大学化工学院,天津,300350;中国石油集团钻井工程技术研究院,北京,100089 |
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| 基金项目： | 国家重大科技专项(2016ZX05020-004) |
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| 摘 要： | 针对目前固井使用的缓凝剂存在的热稳定性能不好、异常胶凝现象（结块）、水泥石抗压强度减弱、水泥浆综合性能欠佳等问题，通过水溶液自由基聚合，研制了一种新型高温缓凝剂GWR-1，并对其热稳定性能进行了评价，同时，对加入4种缓凝剂GWR-1、GWH-1、HX-400、DRH-200L的水泥浆异常胶凝现象和综合性能做了比较。微观结构分析表明：各单体参与了反应，分子量分布较为均一，分子结构高温下稳定，GWR-1的热稳定性可达350℃。GWR-1在硅酸盐水泥基复合材料中应用性能测试结果表明：加入GWR-1水泥浆的稠化温度可达160℃，高温时加量不敏感，高温抗盐性能较好，加入GWR-1的水泥浆在150℃不会发生异常胶凝现象，且其硅酸盐水泥石的强度发展良好，低密度和高密度的水泥浆的综合性能优于加入其他3种缓凝剂的水泥浆。
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| 关 键 词： | 缓凝剂 硅酸盐水泥 热稳定性 异常胶凝 综合性能 |
| 收稿时间： | 2018-10-15 |
Synthesis of a novel retarder and its application in cement matrix composites |
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| Junxing LI,Jintang GUO,Chi ZHANG,Pengpeng LI.Synthesis of a novel retarder and its application in cement matrix composites[J].Chemical Industry and Engineering Progress,2019,38(6):2953-2960. |
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| Authors: | Junxing LI Jintang GUO Chi ZHANG Pengpeng LI |
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| Affiliation: | 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
2. Drilling Research Institute of CNPC, Beijing 100089, China |
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| Abstract: | For conventional cementing, the retarders used currently have some shortcomings, such as poor thermostability, abnormal gelation (clots), compressive strength reduction and low quantities of cement. In this paper, a new retarder, GWR-1, was prepared by aqueous free-radical polymerization and its thermostability was tested. Also, the abnormal gelation and other related properties of cement slurry added with GWR-1 were compared to those added with other three retarders GWH-1, HX-400 and DRH-200L. The structural analysis shows that almost all monomers are involved in the polymer, and the distribution of molecular weight is relatively uniform. The GWR-1 retarder is stable at 350℃. The performance test of silicate cement composite containing GWR-1 shows that the thickening temperature of cement slurry increasesd to 160℃ after adding GWR-1. The addition amount of GWR-1 is not sensitive at high temperature and the salt resistance at high temperature is good. The cement slurry with GWR-1 will not have abnormal cementing phenomenon at 150℃, and the strength of final cement stone develops well. The comprehensive performance of low density and high density cement slurry added to GWR-1 is better than that with three other retarders. |
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| Keywords: | retarder portland cement thermostability abnormal gelation comprehensive properties |
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