一种新型缓凝剂的制备及其在水泥基复合材料中的应用

doi:10.16085/j.issn.1000-6613.2018-2039

摘要/Abstract

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。

关键词: 缓凝剂, 硅酸盐水泥, 热稳定性, 异常胶凝, 综合性能

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.

Key words: retarder, portland cement, thermostability, abnormal gelation, comprehensive properties

中图分类号:

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(06): 2953-2960.

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(06): 2953-2960.

图/表 16

参考文献 23

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编号	A m(AMPS)∶m(IA)∶ m(NVP)∶m(AA)∶m(SSS)	B APS加量（占单体总质量）/%	C 温度/℃	D pH	稠化时间 /min
1	6.5∶0.5∶1∶0.75∶1.25	0.5	50	2	312
2	6.5∶0.5∶1∶0.75∶1.25	1	55	3	304
3	6.5∶0.5∶1∶0.75∶1.25	1.5	60	4	295
4	6∶1∶1∶0.75∶1.25	0.5	55	4	294
5	6∶1∶1∶0.75∶1.25	1	60	2	286
6	6∶1∶1:0.75∶1.25	1.5	50	3	275
7	5∶1.5∶1∶1∶1.5	0.5	60	3	303
8	5∶1.5∶1∶1∶1.5	1	55	4	284
9	5∶1.5∶1∶1∶1.5	1.5	50	2	301
K ₁	304	303	296	300
K ₂	285	291	294	294
K ₃	296	290	295	291
R	16	13	2	9
最佳水平	A ₁	B ₁	C ₁	D ₁
最佳水平

编号	A m(AMPS)∶m(IA)∶ m(NVP)∶m(AA)∶m(SSS)	B APS加量（占单体总质量）/%	C 温度/℃	D pH	稠化时间 /min
1	6.5∶0.5∶1∶0.75∶1.25	0.5	50	2	312
2	6.5∶0.5∶1∶0.75∶1.25	1	55	3	304
3	6.5∶0.5∶1∶0.75∶1.25	1.5	60	4	295
4	6∶1∶1∶0.75∶1.25	0.5	55	4	294
5	6∶1∶1∶0.75∶1.25	1	60	2	286
6	6∶1∶1:0.75∶1.25	1.5	50	3	275
7	5∶1.5∶1∶1∶1.5	0.5	60	3	303
8	5∶1.5∶1∶1∶1.5	1	55	4	284
9	5∶1.5∶1∶1∶1.5	1.5	50	2	301
K ₁	304	303	296	300
K ₂	285	291	294	294
K ₃	296	290	295	291
R	16	13	2	9
最佳水平	A ₁	B ₁	C ₁	D ₁
最佳水平

稠化温度/℃	缓凝剂加量/%	初始稠度/Bc	过渡时间/min	稠化时间/min
140	2	10	2	301
150	2	9	3	269
160	2	12	2	241
140	3	10	3	339
150	3	12	2	299
160	3	11	2	266
140	4	9	2	372
150	4	11	3	325
160	4	12	2	293

稠化温度/℃	缓凝剂加量/%	初始稠度/Bc	过渡时间/min	稠化时间/min
140	2	10	2	301
150	2	9	3	269
160	2	12	2	241
140	3	10	3	339
150	3	12	2	299
160	3	11	2	266
140	4	9	2	372
150	4	11	3	325
160	4	12	2	293

编号	缓凝剂加量/%	盐水含量/%	稠化时间/min	稠化温度/℃
1	1.5	15	282	130
2	2	15	305	130
3	2.5	15	323	130
4	2	0	284	130
5	2	5	290	130
6	2	10	287	130