聚羧酸鹽混凝土高效減水劑的合成

化工論文編號(hào):HG054  論文字?jǐn)?shù):10726,頁數(shù):24

目  錄
中文摘要 I
英文摘要 II
目錄 III
1. 緒論 1
 1.1  概述 1
 1.2  減水劑的分類 1
 1.3 聚羧酸鹽混凝土高效減水劑的研究現(xiàn)狀及作用機(jī)理 1
 1.4 聚羧酸鹽混凝土高效減水劑的制備 3
2. 實(shí)驗(yàn)部分 4
 2.1 實(shí)驗(yàn)材料  4
     2.2 實(shí)驗(yàn)儀器 4
     2.3 實(shí)驗(yàn)方法和步驟 4
     2.4 合成工藝流程 5
     2.5 水泥凈漿流動(dòng)度的測(cè)試 5
     2.6 高效減水劑含固量的測(cè)定 5
3. 結(jié)果與討論 7
 3.1 原料方式的影響    7
 3.2 原料的影響   7
     3.3 鏈轉(zhuǎn)移劑甲基丙烯基磺酸鈉(SMAS)的影響 8
     3.4 含固量的影響 8
     3.5 環(huán)氧乙烷數(shù)目的影響 9
     3.6 兩種原料摩爾比的影響 9
     3.7 pH值的影響 12
     3.8 與萘系減水劑的比較 12
     3.9 與第一代減水劑產(chǎn)品的比較 13
     3.10與其他減水劑產(chǎn)品的比較 14
4.結(jié)論與展望 15
致謝 17
參考文獻(xiàn) 18

摘  要：水泥減水劑的作用，就是加入到混凝土中可明顯減少拌和水泥混凝土?xí)r所加入的水量，同時(shí)大大提高水泥混凝土漿料的流動(dòng)性能和水泥混凝土的強(qiáng)度，從而提高工程的質(zhì)量。二步法合成減水劑由于生產(chǎn)所耗時(shí)間長，含固量不高，溶解度不高等原因，促使人們迫切開發(fā)新的高效減水劑。本文簡述了實(shí)驗(yàn)研制的聚羧酸型減水劑即烯丙基系減水劑的研究,簡要介紹了減水劑的研究前景、分類、減水機(jī)理,以及烯丙基系減水劑的生產(chǎn)流程，重點(diǎn)討論了投料方式, 原料廠家,SMAS的添加,含固量,EO數(shù)目,AA:APEG配比和pH值等因素對(duì)烯丙基減水劑效果的影響,并且從水泥凈漿流動(dòng)性,保持性和混凝土的流動(dòng)性比較了本實(shí)驗(yàn)研制的聚羧酸減水劑和采用二步法合成的聚羧酸減水劑,萘系減水劑以及其他減水劑產(chǎn)品的實(shí)驗(yàn)效果，最后得出總結(jié)。
關(guān)鍵詞:對(duì)比實(shí)驗(yàn) ；AA:APEG摩爾比 ；EO數(shù)目
   
 The Synthesis of Concrete Polycarboxylate Superplasticizer 
 Abstract: The function of the cement superplasticizer is to reduce the amount of water used in mixing concrete, to enhance the fluidity of concrete slurry and strength, so as to improve the quality of the projects. The long time of the first generation of cement superplasticizer taken in producing, low solid content require an advanced type of superplasticizer. This paper briefly studied the advanced polycarboxylate superplasticizer - the allyl group superplasticizer whose future development, sorts, the principle of its function on reducing water and its production flow are concerned with. It emphasized the influencing factors of the allyl group uperplasticizers, such as the mode of feeding, the quality of the materials, the SMAS, the solid content, the numbers of EO, the molar ratio of AA to APEG, and the neutralization degree of acrylic acid. From the fluidity and solidification of the net cement slurry and the concrete to show the differences between the products of the two-step synthesis and the laboratory research’s polycarboxylate superplasticizers, the function of the naphthalene superplasticizer and some other superplasticizer  products were compared.
Keywords: comparative experiment; molar ratio of AA and APEG; EO numbers; cement fluidity