本文關(guān)鍵詞：四種醇胺類物質(zhì)對(duì)水泥水化及強(qiáng)度性能影響的研究　出處：《華南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 醇胺類物質(zhì) 水化速率 水化產(chǎn)物組成 膠砂強(qiáng)度

【摘要】：助磨劑是在水泥粉磨時(shí)加入的起助磨作用而又不損害人體健康和水泥與混凝土性能的外加劑。醇胺類物質(zhì)是目前工業(yè)上水泥助磨劑的主要組分，這類物質(zhì)對(duì)水泥的增強(qiáng)作用主要是體現(xiàn)在兩方面：一是物理增強(qiáng)作用，即醇胺類物質(zhì)在粉磨過(guò)程中因影響水泥顆粒級(jí)配而產(chǎn)生的強(qiáng)度變化，如醇胺類物質(zhì)的加入在同等的比表面積下，使水泥顆粒分布集中，從而提高膠砂強(qiáng)度；二是化學(xué)增強(qiáng)作用，是醇胺類物質(zhì)對(duì)水泥熟料礦物水化過(guò)程的化學(xué)激發(fā)效果。實(shí)際生產(chǎn)中由于對(duì)各種醇胺類物質(zhì)對(duì)水泥的化學(xué)增強(qiáng)作用機(jī)理研究不透徹，很少根據(jù)熟料礦物組成或水泥強(qiáng)度來(lái)調(diào)整助磨劑中醇胺類物質(zhì)的組合，導(dǎo)致助磨劑增強(qiáng)效果的不穩(wěn)定，因此深入研究各種醇胺類物質(zhì)對(duì)不同熟料礦物組成水泥水化的作用機(jī)理及強(qiáng)度性能的影響尤為迫切。 本文選通過(guò)化學(xué)結(jié)合水、水化熱、CH量的變化研究了四種醇胺類物質(zhì)對(duì)不同熟料礦物組成水泥水化速率的影響。研究結(jié)果表明：TEA促進(jìn)了1d、3d、28d齡期的水化速率；TIPA降低了早期（1d、3d）的水化速率，顯著提高了28d水化速率；DEIPA、EDIPA對(duì)早期水化速率影響不大，，可顯著提高28d齡期的水化速率；TIPA、EDIPA、DEIPA增加了完全水化樣的化學(xué)結(jié)合水量，降低了水化產(chǎn)物中CH的比例，改變了水泥水化產(chǎn)物的組成。 本文通過(guò)連續(xù)酸萃取法和能譜掃描，證實(shí)了TIPA、DEIPA、EDIPA的加入使得C-S-H組成發(fā)生了改變，生成了更多高Ca/Si比的C-S-H。另外通過(guò)掃描電鏡對(duì)水泥28d齡期水化產(chǎn)物的形貌分析，本文發(fā)現(xiàn)空白樣及摻TEA的漿體中水化產(chǎn)物較為結(jié)晶粗大，C-S-H呈針棒狀交織在一起，結(jié)構(gòu)相對(duì)疏松，而摻有TIPA、DEIPA、EDIPA的水泥漿體中，水化產(chǎn)物的晶體較少，C-S-H更多呈現(xiàn)出一種蜂窩狀網(wǎng)絡(luò)結(jié)構(gòu)，漿體整體結(jié)構(gòu)相對(duì)致密。 四種醇胺類物質(zhì)對(duì)于不同熟料礦物組成水泥的膠砂強(qiáng)度的研究表明：TEA主要增加水泥的早期膠砂強(qiáng)度，且對(duì)C3A含量少，早期強(qiáng)度相對(duì)較低的水泥早期強(qiáng)度增幅更顯著；TIPA主要提高水泥的后期膠砂強(qiáng)度；且對(duì)C3A含量少，早期強(qiáng)度相對(duì)較低的水泥會(huì)降低早期膠砂強(qiáng)度；DEIPA對(duì)早后期強(qiáng)度均有一定的增強(qiáng)作用，且對(duì)C4AF含量較高的水泥的后期強(qiáng)度增幅更顯著；EDIPA提高了L水泥的早期膠砂強(qiáng)度，降低了F水泥的早期膠砂強(qiáng)度，能顯著提高水泥的后期膠砂強(qiáng)度。
[Abstract]:Grinding agent is added in the cement grinding the grinding effect and no harm to human health and the performance of cement and concrete admixtures. Alcohol amine substances are present industry cement grinding agent of the main group, this kind of material to enhance the effect of cement is mainly embodied in two aspects: one is to enhance the role of physics. The change intensity of alcohol amines during the grinding process due to the impact of the cement particle gradation and produce, such as alcohol amine substances added in the same specific surface area, the distribution of cement particles, so as to improve the strength of cement; the two is the chemical enhancement is alcohol amine chemicals on cement clinker mineral water process the activation effect. In the actual production due to various alcohol amines on the cement chemical enhancement mechanism research is not thorough, rarely according to the mineral composition of clinker or to adjust the strength of cement grinding agent in alcohol amine The combination of quality leads to the unstable effect of grinding aids. Therefore, it is particularly urgent to further study the influence of various kinds of alcohol amine on the mechanism and strength performance of cement hydration of different clinker minerals.
This paper selected by chemical combined water, hydration heat, change the amount of CH on the effect of cement hydration rate of four kinds of alcohol amines of different clinker mineral composition. The results showed that TEA promoted 1D, 3D, the hydration rate of 28d age; TIPA decreased early (1D, 3D) of water rate, significantly improve the hydration rate of 28d; DEIPA, EDIPA on the early hydration rate has little effect, can significantly improve the hydration rate of 28d age; TIPA, EDIPA, DEIPA increased the chemical hydration kind of combined water, reduce the hydration products in the proportion of CH, changed the composition of cement water the product.
This paper by acid extraction and continuous spectrum scanning, confirmed by TIPA, DEIPA, EDIPA into the C-S-H changed, the generation of more than C-S-H. in high Ca/Si morphology of the cement 28d age of hydration products by SEM analysis, this paper found that the slurry of hydration products and the blank sample doped TEA C-S-H is more coarse needle like crystal, intertwined, loose structure, and mixed with TIPA, DEIPA, EDIPA in cement paste, crystal less hydration products, C-S-H presents a more honeycomb network structure, the overall structure of the slurry density.
Study on four kinds of alcohol amines with different mineral composition of clinker strength of cement mortar show that TEA mainly increase the early strength of cement mortar, and the content of C3A, increase the early strength of cement early strength is relatively low more significantly; TIPA is mainly to improve the later strength of cement mortar; and the C3A content of less early relatively low strength cement can reduce the early strength of cement; DEIPA certain enhancement effect on both early and late strength, and strength increase for the high C4AF content of cement is more significant; EDIPA improve the early strength of L cement mortar, reduce early mortar strength of F cement, can significantly improve the late the strength of cement mortar.

【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TQ172.1

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