梳形混凝土超塑化劑的合成

化工論文編號:HG192  論文字數:12805,頁數:24

目     錄
中文摘要 I
英文摘要 II
目     錄 III
1.  緒 論 1
1.1  研究的意義與目的 1
1.2  文獻綜述 2
1.2.1減水劑的發展概況 2
1.2.2 國外高效減水劑的研究現狀 2
1.2.3 國內聚羧酸系減水劑的研究現狀 3
1.2.4 聚羧酸高效減水劑的作用機理 4
1.3 本章小結 5
2. 實驗部分 6
2.1  試驗材料 6
2.1.1 合成減水劑原料和試劑： 6
2.1.2 水泥凈漿試驗材料： 6
2.2  實驗設備 6
2.3  合成工藝流程 7
2.4  實驗方法和步驟 7
2.5 減水劑含固量的測定 7
2.6水泥凈漿流動度的測試 7
3. 實驗結果與討論 9
3.1 投料方式的影響 9
3.2環氧乙烷（EO）數目的影響 9
3.2.1 AA/APEG25的不同摩爾比的影響 10
3.2.2 AA/APEG50的不同摩爾比的影響 10
3.2.3 AA/APEG90的不同摩爾比的影響 11
3.2.4 AA/APEG100的不同摩爾比的影響 12
3.2.5 APEG25與APEG50對比實驗 12
3.2.6 不同廠家APEG25的對比實驗 13
3.3鏈轉移劑甲基丙烯基磺酸鈉(SMAS)的影響 13
3.4 高含固量減水劑的合成 14
3.5對比試驗用不同減水劑產品 15
3.6與萘系減水劑從水泥凈漿流動性和混凝土實驗的比較 15
4. 總結與展望 17
4.1結論 17
4.2 未來展望 17
致謝 19
參考文獻 20

摘 要：近年來高效減水劑在工程上的應用日益廣泛,國內外的研究日新月異。隨著我國大量基礎性工程的破土動工,高效減水劑的需求進一步增大。本文簡要回顧了減水劑的研制、生產和應用歷史，闡述了聚羧酸減水劑的作用機理和國內外的研究現狀。討論了第二代聚羧酸系減水劑即烯丙基系減水劑研究的目的與意義,在保持了第一代聚羧酸系減水劑的強度高、耐熱性、耐久性、耐候性等優異性能的同時，進一步改進生產工藝,提高含固量。簡要介紹了烯丙基系減水劑的生產流程，重點討論了投料方式,AA:APEG配比,EO數目,鏈轉移劑SMAS,含固量等因素對烯丙基減水劑效果的影響,從水泥凈漿流動性,保持性和混凝土的流動性比較了烯丙基系減水劑和第一代聚羧酸系減水劑,萘系減水劑的作用效果。
關鍵詞: 高效減水劑; 聚羧酸系高效減水劑; 烯丙基系高效減水劑;

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；