本文選題：水泥基飾面砂漿 + 泛堿��； 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：水泥基飾面砂漿由于其內(nèi)部或外部環(huán)境水的遷移導(dǎo)致可溶性堿或鹽在砂漿表面析出，造成泛堿和色差等缺陷，嚴(yán)重影響建筑外墻面的裝飾性，且泛堿會隨著環(huán)境條件的變化反復(fù)出現(xiàn)而難以根治。組成材料對飾面砂漿泛堿有重要影響，因此揭示材料組成對飾面砂漿初次泛堿和二次泛堿的影響規(guī)律，，并分析比較飾面砂漿泛堿的抑制措施，對于配制綜合性能優(yōu)良的飾面砂漿具有重要意義。 本文分析了組成材料對水泥基飾面砂漿泛堿性能的影響，并比較幾種外加劑對飾面砂漿泛堿的抑制效果，重點(diǎn)研究了抗泛堿劑抑制水泥基飾面砂漿泛堿的作用機(jī)理。研究結(jié)果表明： ①可再分散乳膠粉和纖維素醚均能降低飾面砂漿的吸水量，提高飾面砂漿柔韌性和界面粘結(jié)性能，有效降低飾面砂漿的泛堿程度，且兩種聚合物復(fù)摻時具有較好的協(xié)同作用；消泡劑和膨脹劑可以減輕飾面砂漿的泛堿程度，但存在一定的負(fù)面作用。 ②石灰石粉和石英粉均能降低砂漿的吸水量，使得水泥基飾面砂漿的泛堿程度較輕，且摻石英粉的經(jīng)濟(jì)性和對于降低砂漿吸水量和提高砂漿抗泛堿性的作用效果明顯優(yōu)于石灰石粉。 ③摻抗泛堿劑和防水劑均能降低飾面砂漿的吸水量，提高飾面砂漿抗泛堿性，其中摻抗泛堿劑的作用效果最佳，而防水劑外涂則可以獲得更佳的抑制效果。 ④抗泛堿劑能降低水泥基飾面砂漿中Ca(OH)2的含量，改善飾面砂漿的孔結(jié)構(gòu)，減少骨料與水泥石的界面區(qū)域缺陷，提高飾面砂漿的致密性。
[Abstract]:Due to the internal or external environmental water migration of cement based finishing mortar, soluble alkali or salt precipitates on the mortar surface, which results in defects such as pan-alkali and color aberration, which seriously affect the decoration of exterior wall of building.And pan-alkaloids will appear repeatedly with the change of environmental conditions and it is difficult to cure.The composition material has an important effect on the pan-alkali of finishing mortar, so it reveals the influence of the composition of the material on the primary and secondary ubiquitin of the finishing mortar, and analyzes and compares the inhibition measures of the pan-alkali of the finishing mortar.It is of great significance to prepare the finishing mortar with good comprehensive properties.In this paper, the effect of composition materials on the ubiquitin properties of cement-based finishing mortar is analyzed, and the inhibition effect of several admixtures on ubiquitin is compared. The mechanism of anti-panabinic agent on the inhibition of ubiquitin of cement-based finishing mortar is mainly studied in this paper.The results show that:1Redispersible emulsion powder and cellulose ether can both reduce the water absorption of the finishing mortar, improve the flexibility and interfacial bonding property of the finishing mortar, and effectively reduce the degree of pan-alkali of the decorative mortar, and the two kinds of polymer have good synergistic effect when they are co-doped;Defoamer and expander can reduce the degree of ubiquitin of finishing mortar, but there are some negative effects.(2) both limestone powder and quartz powder can reduce the water absorption of mortar, so that the degree of pan-alkalinity of cement based finishing mortar is lighter.Moreover, the economic effect of adding quartz powder and its effect on reducing the water absorption of mortar and improving the anti-pan-alkalinity of mortar are obviously better than those of limestone powder.(3) both anti-pan-alkali agent and water-repellent agent can reduce the water absorption of the finishing mortar and improve the anti-pan-alkalinity of the finishing mortar, among which the effect of anti-pan-alkali agent is the best, and the better inhibition effect can be obtained when the water-repellent is coated on the outside.(4) the anti-pan-alkali agent can reduce the content of Ca(OH)2 in the cement based mortar, improve the pore structure of the mortar, reduce the defects in the interface between aggregate and cement, and improve the compactness of the mortar.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU578.1

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