本文選題：聚羧酸引氣減水劑 + 水相四元共聚��； 參考：《山東大學(xué)》2013年碩士論文

【摘要】：聚羧酸減水劑具有高減水率和坍落度經(jīng)時(shí)損失小等特點(diǎn),是當(dāng)今混凝土高性能減水劑研究中重要的研究課題。 本文采用聚乙二醇單甲醚、丙烯酸、丙烯酸羥基乙酯、甲基丙烯磺酸鈉等四種單體為主要原料,自由基“一步聚合法”聚合生成水溶性梳狀高分子長鏈。采用安全環(huán)保的水相共聚體系聚合,優(yōu)化了水相四元共聚反應(yīng)的合成工藝條件如溫度、時(shí)間、濃度、混合液滴加方式并在最佳條件下合成出一種聚羧酸減水劑。 聚羧酸減水劑能夠有效提高水工混凝土的密實(shí)性,通過測試各種聚羧酸減水劑對混凝土抗?jié)B、抗沖磨性能的影響,初步探討聚羧酸減水劑混凝土的高抗?jié)B、抗磨蝕機(jī)理,為用于高抗?jié)B、抗沖磨水工混凝土的聚羧酸減水劑分子設(shè)計(jì)、單體選擇等參數(shù)的選擇提供參考。 將合成的聚羧酸減水劑采用消泡后再引氣的方式進(jìn)行復(fù)配引氣成分,獲得一種具有引氣泡徑小、數(shù)量多、分布均勻等特性的聚羧酸引氣減水劑。自制聚羧酸減水劑經(jīng)濟(jì)效益系數(shù)為0.41-2.33,劈拉強(qiáng)度為1.97MPa,抗沖磨強(qiáng)度為3.66h/(kg/m2),略高于國內(nèi)外的產(chǎn)品。
[Abstract]:Polycarboxylate superplasticizer has the characteristics of high water reducing rate, slump loss and so on. It is an important research topic in the research of high performance concrete water reducer.
In this paper, four monomers, such as polyethylene glycol monomethyl ether, acrylic acid, hydroxy ethyl acrylate and sodium methacrylic sulfonic acid, are used as the main raw materials, the free radical "one step polymerization" is used to polymerize the water-soluble comb polymer long chain. The synthetic process conditions of the four element copolymerization of water phase are optimized by a safe and environmentally friendly copolymerization system. A polycarboxylate superplasticizer was synthesized under optimum conditions.
Polycarboxylic water reducing agent can effectively improve the compactness of hydraulic concrete. By testing the effect of polycarboxylic acid water reducing agent on the anti seepage and abrasion resistance of concrete, the high anti seepage and abrasion resistance mechanism of Polycarboxylic Water Reducer concrete are preliminarily discussed. It is the design of Polycarboxylic Water Reducer for high permeability and anti abrasion hydraulic concrete. Selection of alternative parameters provides reference.
The synthetic Polycarboxylic Water reducing agent is mixed with gas by defoaming and defoaming. A polycarboxylic acid water reducing agent with small bubble diameter, large quantity and uniform distribution is obtained. The economic efficiency coefficient of the self-made polycarboxylic acid water reducing agent is 0.41-2.33, the splitting strength is 1.97MPa, the anti grinding strength is 3.66h/ (kg/m2), slightly higher. Products at home and abroad.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU528.042.2;TQ317

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