本文選題：礦渣　切入點(diǎn)：粉煤灰　出處：《濟(jì)南大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：水泥混合材料一般為具有一定潛在水化活性的膠凝性材料，在水泥的水化、硬化過(guò)程中，主要表現(xiàn)為改變水泥熟料水化過(guò)程，有利于提高硬化漿體的結(jié)構(gòu)致密度，改善水泥性能、從而提高硬化漿體的各齡期強(qiáng)度。水泥生產(chǎn)中摻加混合材料已經(jīng)成為水泥行業(yè)節(jié)能減排，發(fā)展綠色水泥的重要途徑。然而，水泥混合材料的水化活性相對(duì)較低，摻入量較大時(shí)，會(huì)影響水泥的早期強(qiáng)度。另外，混合材料的粉磨細(xì)度及其粒度分布對(duì)于水泥粉磨電耗及其各齡期強(qiáng)度具有重要的影響，因此，研究和探索混合材料與水泥熟料之間合理的粒度分布匹配對(duì)于充分發(fā)揮混合材料的潛在水化活性、提高水泥的力學(xué)性能及其他性能具有重要的意義。 本文選取礦渣、粉煤灰、石灰石三種常用的水泥混合材料，分別粉磨制備了5個(gè)不同細(xì)度及粒度分布的粉體試樣，試驗(yàn)研究了各粉體摻入量對(duì)水泥性能的影響，并結(jié)合硬化漿體的孔結(jié)構(gòu)特征參數(shù)，運(yùn)用灰色系統(tǒng)理論研究分析了混合材料的粒度分布與水泥各齡期強(qiáng)度之間的關(guān)聯(lián)度與關(guān)聯(lián)極性，以期發(fā)現(xiàn)混合材料粒度分布對(duì)水泥性能的影響規(guī)律，優(yōu)化混合材料與水泥熟料之間的粒度分布匹配。研究結(jié)果表明，三種混合材料的粒度分布顯著地影響水泥各齡期強(qiáng)度。 粒徑＜11μm的顆粒含量為59.33%～77.31%時(shí)的礦渣微粉摻入量為30%時(shí)，水泥各試樣的標(biāo)準(zhǔn)稠度需水量無(wú)明顯變化；初凝時(shí)間、終凝時(shí)間縮短30min以上；水泥3d、28d抗折強(qiáng)度提高10%以上，抗壓強(qiáng)度提高7%以上。礦渣微粉粒度區(qū)間與硬化水泥石抗壓強(qiáng)度之間關(guān)聯(lián)度的計(jì)算結(jié)果表明：0~23μm的礦渣微粉顆粒對(duì)水泥3d、28d抗壓強(qiáng)度起增進(jìn)作用；23μm的礦渣微粉顆粒對(duì)水泥的3d、28d抗壓強(qiáng)度起削弱作用。0~5μm、5~11μm的礦渣微粉顆粒含量分別是礦渣水泥3d、28d抗壓強(qiáng)度的最強(qiáng)影響因子。此外，摻入礦渣微粉的礦渣水泥各試樣漿體中無(wú)害孔、少害孔呈明顯增大趨勢(shì)，多害孔顯著降低，，無(wú)害孔數(shù)量增大6.63%，少害孔數(shù)量增大11.01%，多害孔數(shù)量減少21.6%。 粒徑＜10μm的顆粒含量為33.1%~59.3%時(shí)的粉煤灰摻入量為10%時(shí)，水泥各試樣的標(biāo)準(zhǔn)稠度需水量增加約3%以上，初凝時(shí)間、終凝時(shí)間降低約14%，水泥3d、28d抗折強(qiáng)度提高8%以上，3d、28d抗壓強(qiáng)度提高11%以上。通過(guò)粉煤灰粒度分布與粉煤灰水泥抗壓強(qiáng)度之間的關(guān)聯(lián)度及關(guān)聯(lián)極性計(jì)算得到：0~33μm的粉煤灰顆粒含量對(duì)水泥3d、28d抗壓強(qiáng)度起增進(jìn)作用；33μm的粉煤灰顆粒含量對(duì)水泥3d、28d抗壓強(qiáng)度起削弱作用。0~5μm、5~10μm的粉煤灰顆粒含量分別是粉煤灰水泥3d、28d抗壓強(qiáng)度的最強(qiáng)影響因子。10%粉煤灰的摻入，使得試樣F1~F5水泥漿體的無(wú)害孔數(shù)量增加12.24%，少害孔數(shù)量增加12.11%，有害孔數(shù)量減少10.83%，多害孔數(shù)量減少13.51%。 粒徑＜11μm的顆粒含量為51.7%~83.3%時(shí)石灰石粉摻入量為5%時(shí)，水泥各試樣的標(biāo)準(zhǔn)稠度需水量降低約4%，初凝時(shí)間、終凝時(shí)間降低約15%，水泥的3d、28d抗折強(qiáng)度提高10%以上，3d、28d的抗壓強(qiáng)度增長(zhǎng)6%以上。關(guān)聯(lián)度計(jì)算結(jié)果顯示：0~23μm的石灰石粉顆粒對(duì)水泥3d、28d抗壓強(qiáng)度起增進(jìn)作用，23μm石灰石粉顆粒對(duì)水泥的3d、28d抗壓強(qiáng)度起削弱作用。5~11μm、0~5μm的石灰石粉顆粒含量分別是石灰石水泥3d、28d抗壓強(qiáng)度的最強(qiáng)影響因子。10%磨細(xì)石灰石粉的摻入，導(dǎo)致試樣S1~S5水泥漿體的無(wú)害孔數(shù)量減少12.4%，少害孔、有害孔的數(shù)量分別增加9.28%、8.14%，多害孔的數(shù)量減少4.32%。
[Abstract]:Cement mixed material is generally cementitious material has a certain potential hydration activity, in cement hydration, hardening process, mainly for the change of cement clinker hydration process, help to improve the structure of hardened paste density, improve the performance of cement, so as to improve the strength of all age hardening cement paste. In the production of adding mixed materials has become the energy saving and emission reduction in cement industry is an important way for the development of green cement. However, cement hydration activity is relatively low, the incorporation of a large amount of time, will affect the early strength of cement. In addition, fineness and particle size distribution of mixed material for cement grinding power consumption and the age strength has an important influence, therefore, the research and exploration between the mixed material of cement clinker and reasonable particle size distribution, to give full play to the potential hydration activity of mixed materials, improve the mechanical properties of cement Energy and other performance are of great significance.
This paper selects slag, fly ash, limestone, three kinds of commonly used cement mixed materials, respectively, were prepared by 5 different grinding fineness and particle size distribution of the powder sample, the test study of the influence of mixing amount of powder on the properties of cement, and combined with the characteristics of pore structure of hardened paste parameters, using grey system theory analysis of the correlation degree and correlation between particle size distribution of the cement mixed material and the age strength of polarity, in order to find the influence on the performance of cement mixed material particle size distribution, particle size optimization between mixed materials and cement clinker distribution matching. The results show that the particle size distribution of three kinds of hybrid materials significantly affect cement the strength of every age.
The particle size is less than 11 m particle content is 59.33% ~ 77.31% when the doping amount of slag powder is 30%, the standard consistency of cement samples of water had no obvious change; the initial setting time and the final setting time shorter than 30min; cement 3D, 28d flexural strength increased by more than 10%, the compressive strength increased by more than 7% between slag powder particle size range and compressive strength of hardened cement paste correlation calculation results show that 0~23 m slag powder on cement particles 3D, 28d compressive strength of up to enhance the role of slag particle; 23 m of cement 3D, 28d compressive strength has weakened.0~5 m slag particle content 5~11 M are 3D slag cement, the strongest influence factors of compressive strength of 28d. In addition, harmless pore slag cement slurry samples doped slag powder, less harmful hole was significantly increasing trend, and significantly reduce multi hole, harmless hole number increased 6.63%, less harm The number of holes increased by 11.01%, and the number of multiple damage holes was reduced by 21.6%.
The particle size is less than 10 m particle content is 33.1%~59.3% when the fly-ash amount is 10%, the standard consistency of cement samples of water demand increased about 3% above, the initial setting time and the final setting time is reduced by about 14%, cement 3D, 28d flexural strength increased by more than 8%, 3D, 28d compressive strength increased 11%. Through correlation and correlation between the particle size distribution of fly ash and fly ash cement, the compressive strength of the polarity calculation: fly ash particle content 0~33 m of cement 3D, 28d compressive strength has enhanced; fly ash content of 33 m of cement 3D, 28d compressive strength has weakened the role of.0~5 m, fly ash content of 5~10 m were the fly ash cement 3D, 28d compressive strength of the strongest influence factor of.10% fly ash, the harmless hole specimen of F1~F5 cement paste increases with the number of 12.24%, and a 12.11% increase in the number of small holes, to reduce the number of harmful holes 10.83%, and multi hole Reduce the number of 13.51%.
The particle size is less than 11 m particle content of 51.7%~83.3% limestone powder is mixed with the amount of 5%, the standard consistency of cement samples of water demand reduced by about 4%, the initial setting time and the final setting time is reduced by about 15%, cement 3D, 28d flexural strength increased by more than 10% 3D, the compressive strength of 28d growth 6%. Correlation calculation results show that the 0~23 m of the limestone powder particles of cement 3D, 28d compressive strength has enhanced 23 m limestone particles of cement 3D, 28d compressive strength has weakened the role of.5~11 m, 0~5 m content of limestone particles are limestone cement 3D, 28d the compressive strength of the strongest influence factor of.10% milled limestone powder mixing, resulting in the number of harmless hole specimen of S1~S5 cement paste is reduced by 12.4%, less harm hole, number of harmful holes were increased by 9.28%, 8.14%, the number of holes to reduce 4.32%. damage

【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TQ172.1

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本文編號(hào)：1566765