本文選題：套筒灌漿料　切入點(diǎn)：超早強(qiáng)　出處：《山東建筑大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著裝配式建筑的發(fā)展,作為裝配式建筑的關(guān)鍵節(jié)點(diǎn),在裝配式建筑中鋼筋套筒灌漿連接普遍應(yīng)用。因此對(duì)于套筒灌漿料的要求也在日益提高,傳統(tǒng)套筒灌漿料在應(yīng)用過(guò)程中暴露出許多問(wèn)題,因此研制高性能的灌漿料對(duì)于裝配式建筑的發(fā)展必不可少。聚羧酸減水劑與傳統(tǒng)的高效減水劑相比具有減水率高、保坍能力強(qiáng)、分子結(jié)構(gòu)設(shè)計(jì)靈活等優(yōu)點(diǎn)。聚羧酸系減水劑是一類分子結(jié)構(gòu)呈梳形、含多羧基的聚合物表面活性劑,分子結(jié)構(gòu)的獨(dú)特使得這類減水劑具有更多的特點(diǎn)。隨著高性能砂漿與混凝土市場(chǎng)需求的增長(zhǎng),對(duì)減水劑的減水性能、分散性能和力學(xué)性能的要求明顯提高,對(duì)超早強(qiáng)型聚羧酸減水劑的研究逐漸成為研究熱點(diǎn)。迫切需要研發(fā)早期強(qiáng)度高、減水率較高、適應(yīng)性好、保坍能力強(qiáng)的外加劑。首先依據(jù)聚羧酸高性能減水劑的分子結(jié)構(gòu)設(shè)計(jì)思想,通過(guò)改變甲基烯丙基聚氧乙烯醚長(zhǎng)側(cè)鏈的分子量,接枝能提高混凝土早期強(qiáng)度的酰胺基團(tuán)等進(jìn)行單因素合成試驗(yàn)。然后采用正交試驗(yàn)方法確定了合成最優(yōu)方案,即合成小料摻量為0.3%,引發(fā)劑摻量為0.6%,酸醚比為5.5∶1,AM替代率為20%,大單體的比例n(HPEG2400)∶n(HPEG5000)=0.5∶1,鏈轉(zhuǎn)移劑摻量為1.4%,并且在最優(yōu)方案下合成出了超早強(qiáng)聚羧酸減水劑PC-S。通過(guò)改變聚羧酸減水劑摻量,研究了聚羧酸減水劑對(duì)套筒灌漿料性能的影響,確定出超早強(qiáng)聚羧酸減水劑的最佳摻量為0.16%。通過(guò)砂漿試驗(yàn)研究其各早強(qiáng)組分隨摻量變化對(duì)性能的影響,然后通過(guò)正交試驗(yàn)確定了復(fù)配早強(qiáng)劑的最優(yōu)方案,即硫酸鈉摻量為0.5%,亞硝酸鈉摻量為0.5%,甲酸鈣摻量為0.5%。通過(guò)對(duì)比試驗(yàn)發(fā)現(xiàn),摻加PC-S超早強(qiáng)聚羧酸減水劑,可以使套筒灌漿料早期強(qiáng)度提高,而28 d的強(qiáng)度發(fā)展差別不大。摻PC1601+復(fù)配早強(qiáng)劑的套筒灌漿料的早期強(qiáng)度也有一定程度的提高,但是28 d強(qiáng)度略有降低。
[Abstract]:With the development of assembly building, as the key node of assembly building, the reinforced sleeve grouting connection is widely used in assembly building, so the requirement of sleeve grouting material is also increasing day by day. Many problems have been exposed in the application of traditional sleeve grouting materials, so it is necessary to develop high performance grouting materials for the development of fabricated buildings. Compared with traditional high efficiency water reducing agents, polycarboxylic acid superplasticizer has high water reducing rate and strong ability to protect against collapse. Polycarboxylic acid superplasticizer is a kind of polymer surfactant with comb-shaped molecular structure and polycarboxyl group. With the increase of market demand for high performance mortar and concrete, the requirements for water reducing performance, dispersion and mechanical properties of water reducing agents are obviously increased. The research on super early strong polycarboxylic acid superplasticizer has gradually become a research hotspot. It is urgent to develop early high strength, high water reduction rate and good adaptability. First, according to the molecular structure design idea of polycarboxylic acid high performance water reducer, by changing the molecular weight of long side chain of methyl allyl polyoxyethylene ether, The single factor synthesis experiment was carried out by grafted amide groups which can improve the early strength of concrete. The optimum scheme of synthesis was determined by orthogonal test. That is to say, the amount of synthetic small material is 0.3, the amount of initiator is 0.6, the ratio of acid to ether is 5.5: 1am, the substitution rate of AM is 20, the ratio of macromonomer to monomer is 0.5: 1, the amount of chain transfer agent is 0.5: 1, and the super early strong polycarboxylic acid reducer PC-S has been synthesized by changing the amount of polycarboxylic acid water reducer. The effect of polycarboxylic acid superplasticizer on the performance of sleeve grouting material was studied. The optimum addition amount of super early strong polycarboxylic acid superplasticizer was determined to be 0.16. Then through orthogonal test, the optimum scheme of compound early strength agent is determined, that is, the dosage of sodium sulfate is 0.5, sodium nitrite is 0.5 and calcium formate is 0.5. Through the contrast experiment, it is found that the addition of PC-S super early polycarboxylic acid superplasticizer, The early strength of sleeve grouting material increased, but the strength development of 28 days was not different. The early strength of sleeve grouting material mixed with PC1601 was also increased to a certain extent, but the strength of 28 days was slightly decreased.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU528.042.2

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