梳形混凝土超塑化剂的合成

范文编号:HG192  范文字数:12805,页数:24

摘 要：近年来高效减水剂在工程上的应用日益广泛,国内外的研究日新月异。随着我国大量基础性工程的破土动工,高效减水剂的需求进一步增大。本文简要回顾了减水剂的研制、生产和应用历史，阐述了聚羧酸减水剂的作用机理和国内外的研究现状。讨论了第二代聚羧酸系减水剂即烯丙基系减水剂研究的目的与意义,在保持了第一代聚羧酸系减水剂的强度高、耐热性、耐久性、耐候性等优异性能的同时，进一步改进生产工艺,提高含固量。简要介绍了烯丙基系减水剂的生产流程，重点讨论了投料方式,AA:APEG配比,EO数目,链转移剂SMAS,含固量等因素对烯丙基减水剂效果的影响,从水泥净浆流动性,保持性和混凝土的流动性比较了烯丙基系减水剂和第一代聚羧酸系减水剂,萘系减水剂的作用效果。
关键词: 高效减水剂; 聚羧酸系高效减水剂; 烯丙基系高效减水剂;

Abstract: In recent years superplasticizer in engineering has been more widely used, the research is also changing at home and abroad. As lots of infrastructure projects are constructing in China now, the demand of superplasticizer was further increased. This paper briefly reviewed the development, production and application history of the superplasticizer, and introduced the mechanism of polycarboxylate superplasticizer and the role of superplasticizer at home and abroad. The purpose and significance of the second-generation polycarboxylate superplasticizer synthesized with allyl polyether was reviewed. While keeping the high strength, heat resistance, durability, weatherability and other excellent performance of the first generation of polycarboxylate superplasticizer, we improved the production process, and increased the solid volume. The paper also introduced the production processes of superplasticizer briefly, and focused on the investigation of the effects of feeding mode, ratio of AA to APEG, the number of EO, chain transfer agent SMAS, solid content on the effect of allyl superplasticizer, and compared the effect between the allyl superplasticizer and the first generation of polycarboxylate superplasticizer, Naphthalene superplasticizer with the cement slurry flow and the Concrete flow experiment.
 Keywords: Superplasticizer；  Polycarboxylate superplasticizer；   Allyl superplasticizer； 
目     录
中文摘要 I
英文摘要 II
目     录 III
1.  绪 论 1
1.1  研究的意义与目的 1
1.2  文献综述 2
1.2.1减水剂的发展概况 2
1.2.2 国外高效减水剂的研究现状 2
1.2.3 国内聚羧酸系减水剂的研究现状 3
1.2.4 聚羧酸高效减水剂的作用机理 4
1.3 本章小结 5
2. 实验部分 6
2.1  试验材料 6
2.1.1 合成减水剂原料和试剂： 6
2.1.2 水泥净浆试验材料： 6
2.2  实验设备 6
2.3  合成工艺流程 7
2.4  实验方法和步骤 7
2.5 减水剂含固量的测定 7
2.6水泥净浆流动度的测试 7
3. 实验结果与讨论 9
3.1 投料方式的影响 9
3.2环氧乙烷（EO）数目的影响 9
3.2.1 AA/APEG25的不同摩尔比的影响 10
3.2.2 AA/APEG50的不同摩尔比的影响 10
3.2.3 AA/APEG90的不同摩尔比的影响 11
3.2.4 AA/APEG100的不同摩尔比的影响 12
3.2.5 APEG25与APEG50对比实验 12
3.2.6 不同厂家APEG25的对比实验 13
3.3链转移剂甲基丙烯基磺酸钠(SMAS)的影响 13
3.4 高含固量减水剂的合成 14
3.5对比试验用不同减水剂产品 15
3.6与萘系减水剂从水泥净浆流动性和混凝土实验的比较 15
4. 总结与展望 17
4.1结论 17
4.2 未来展望 17
致谢 19
参考文献 20

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