發(fā)布時間：2018-06-21 13:59

  本文選題：細(xì)度匹配 + 組分匹配�。� 參考：《濟南大學(xué)》2014年碩士論文

【摘要】：我國是水泥生產(chǎn)大國，水泥工業(yè)的能源、資源消耗巨大。混合粉磨時水泥粉磨電耗高，由于熟料、混合材的易磨性差異大，造成水泥粒度分布不均勻。水泥粗顆粒中含有許多活性較高的熟料，但是粗粒徑熟料的水化程度較低，造成熟料浪費。 本文通過分別粉磨方式，將不同細(xì)度和組分的熟料、礦粉、低活性混合材相互匹配配制水泥，研究了原料細(xì)度匹配對水泥性能的影響，找出合理的細(xì)度匹配，并在此基礎(chǔ)上研究組分匹配對水泥性能影響。通過顆粒粒度分布、力學(xué)性能、凝結(jié)時間等宏觀檢測方法以及水化熱、綜合熱分析、XRD和SEM等微觀測試技術(shù)，對水泥水化微觀分析，得到以下主要研究結(jié)果： 1．不同細(xì)度的熟料與低活性混合材相互匹配時，細(xì)熟料水泥和中熟料水泥隨混合材細(xì)度增大，標(biāo)準(zhǔn)稠度用水量減小，凝結(jié)時間延長，但變化較小。粗熟料水泥隨混合材細(xì)度增大，標(biāo)準(zhǔn)稠度用水量基本不變，但凝結(jié)時間顯著延長。細(xì)熟料水泥各齡期強度隨混合材細(xì)度增大明顯降低，S1H1K強度最高，S1H2K次之，S1H3K最低。中熟料水泥S2H2K的各齡期強度較高，28d抗壓強度與S1H1K相同，1d抗壓強度低于S2H1K0.9MPa，3d抗壓強度相同，28d、60d抗壓強度高于S2H1K0.3MPa、0.5MPa；粗熟料水泥S3H2K的1d、3d抗壓強度低于S3H1K0.4MPa、0.3MPa，28d、60d抗壓強度高于S3H1K0.6MPa、1.6MPa。說明與中熟料和粗熟料相匹配時，低活性混合材細(xì)度為H2時，水泥強度較高。水泥粒度分布合理，水化放熱速率和水化熱隨混合材和熟料的細(xì)度增大明顯降低；混合材細(xì)度增大，水泥水化第三放熱峰出現(xiàn)時間明顯延遲，水化放熱速率顯著降低，S2H3K與S2H1K相比，第三放熱峰推遲了2h，水化放熱速率降低了13.7%。通過綜合熱分析、XRD、SEM分析等，表明混合材細(xì)度增大，細(xì)熟料水泥水化產(chǎn)物減少，但對中熟料水泥水化影響較小，，粗熟料水泥由于熟料細(xì)度增大，水化速率較慢，所以水化產(chǎn)物明顯減少。不同細(xì)度匹配的水泥孔隙率均較低且孔結(jié)構(gòu)分布合理。 2．綜上可知，中細(xì)度熟料和中細(xì)度低活性混合材相匹配時（S2H2K），水泥的標(biāo)準(zhǔn)稠度用水量低、凝結(jié)時間長且各齡期強度較高，水化放熱速率和放熱量較低，孔隙率較低，孔結(jié)構(gòu)分布較好，是最合理的細(xì)度匹配方案。 3．在最佳細(xì)度匹配方案(S2H2K)基礎(chǔ)上，研究組分匹配對水泥性能影響。實驗表明，隨熟料摻量增加，水泥的標(biāo)準(zhǔn)稠度用水量降低，凝結(jié)時間縮短，水泥的抗折強度、抗壓強度提高。熟料摻量50%的B23d、28d、60d、90d抗壓強度分別為19.7MPa、50.1MPa、59.5MPa、60.9MPa；熟料摻量65%的B5的3d、28d、60d、90d抗壓強度分別為25.2MPa、60.0MPa、65.6MPa、69.9MPa。即用50%熟料、20%礦粉和30%的低活性混合材，制備28d強度達(dá)到50.0MPa的復(fù)合硅酸鹽水泥，用65%熟料、20%礦粉和15%的低活性混合材，水泥28d強度達(dá)到60.0MPa。通過綜合熱分析、XRD、SEM、壓汞測試分析可知，不同組分匹配的水泥水化較好，水泥石結(jié)構(gòu)較為致密，孔結(jié)構(gòu)分布合理。
[Abstract]:China is a big country of cement production. The energy consumption of cement industry is huge. The cement grinding electricity consumption is high when mixed grinding. Due to the clinker, the difference of the grindability of the mixed material is large, the cement granularity distribution is uneven. The cement coarse particles contain a lot of high activity clinker, but the hydration degree of the coarse grained clinker is low, resulting in the waste of the clinker.
In this paper, the cement is prepared by the matching of different fineness and composition of clinker, mineral powder and low active mixture. The effect of fineness matching on the properties of cement is studied, and a reasonable fineness matching is found. On the basis of this, the effect of the components matching on the cement properties is studied. The particle size distribution, mechanical properties and condensation are studied. The following main research results are obtained: macroscopic detection methods such as time, hydrothermal analysis, synthetic thermal analysis, XRD and SEM microcosmic testing techniques.
1. when the fineness of different fineness clinker and low activity mixture is matched, the fine clinker cement and the medium clinker cement increase with the fineness of the mixture, the water consumption of the standard consistency is reduced, the setting time is prolonged, but the change is small. The standard consistency water base of the coarse clinker cement increases with the fineness of the mixture, but the setting time is prolonged. The fine clinker water is prolonged. The strength of each age of mud decreased obviously with the increase of the fineness of the mixture, the strength of S1H1K was the highest, S1H2K was the second, and the S1H3K was the lowest. The strength of the cement S2H2K of the medium clinker was higher, the 28d compressive strength was the same as that of S1H1K, and the 1D compressive strength was lower than S2H1K0.9MPa, and the 3D compressive strength was the same, 28d, 60d compressive strength was higher than that of S2H1K0.3MPa. Compressive strength is lower than S3H1K0.4MPa, 0.3MPa, 28d, 60d is higher than S3H1K0.6MPa, 1.6MPa. shows that when the fineness of low active mixture is H2, the cement strength is higher when the fineness of the medium clinker and coarse clinker is H2, the cement size distribution is reasonable, the hydration heat rate and hydration heat decrease obviously with the fineness of the mixture and clinker, and the fineness of the mixture. In addition, the time of the third exothermic peak of cement hydration third is obviously delayed and the rate of hydration heat release decreases significantly. Compared with S2H1K, the third exothermic peak is delayed by 2H, and the hydration heat rate is reduced by 13.7%. through comprehensive thermal analysis, XRD, SEM analysis and so on, which indicates that the fineness of the mixture increases and the hydration products of the fine clinker cement are reduced, but the hydration of medium clinker cement is hydrated. Because of the smaller influence, the coarse clinker cement, because the fineness of the clinker increases, the hydration rate is slow, so the hydration products obviously decrease. The porosity of the cement with different fineness is lower and the pore structure is reasonable.
2. it is known that when the medium fineness clinker and medium fineness low activity mixture are matched (S2H2K), the standard consistency of cement is low, the setting time is long and the strength of each age is higher, the hydration heat rate and the discharge heat are low, the porosity is low, and the pore structure is well distributed, which is the most reasonable fineness matching scheme.
3. on the basis of the best fineness matching scheme (S2H2K), the effect of the component matching on the cement performance is studied. The experiment shows that with the addition of the clinker, the water consumption of the cement's standard consistency is reduced, the setting time is shortened, the flexural strength and the compressive strength of the cement are increased. The compressive strength of the cement with 50%, 28d, 60d, and 90d is 19.7MPa, 50.1MPa, 59.5MPa, respectively. 60.9MPa; the 3D, 28d, 60d, 90d compressive strength of the clinker with 65% B5, 25.2MPa, 60.0MPa, 65.6MPa, 69.9MPa., respectively, using 50% clinker, 20% mineral powder and 30% low active mixture to prepare the composite Portland cement with 28d strength to meet 50.0MPa, with 65% clinker, 20% mineral powder and 15% low active mixture. The thermal analysis, XRD, SEM and mercury intrusion test showed that the cement with different components matched well, the structure of cement paste was compact, and the pore structure distribution was reasonable.
【學(xué)位授予單位】：濟南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TQ172.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬振珠;岳漢威;宋曉嵐;;水泥水化過程的機理、測試及影響因素[J];長沙大學(xué)學(xué)報;2009年02期

2 趙飛,馮修吉;顆粒大小對水泥水化和性能的影響[J];硅酸鹽通報;1992年04期

3 施娟英;熟料的細(xì)顆粒含量對水泥強度的影響[J];硅酸鹽學(xué)報;1964年01期

4 許仲梓;粒徑分布對水泥水化速度的影響的理論探討[J];硅酸鹽學(xué)報;1986年01期

5 郭隨華,翁端,陳益民;我國水泥工業(yè)“生態(tài)化”的研究現(xiàn)狀和發(fā)展趨勢[J];硅酸鹽學(xué)報;2001年02期

6 李北星,胡曉曼,陳娟,何真;高摻量混合材復(fù)合水泥的水化性能[J];硅酸鹽學(xué)報;2004年10期

7 盧文運;;水泥粉磨技術(shù)現(xiàn)狀的探究[J];廣東建材;2012年09期

8 吳浪;宋固全;雷斌;;基于多相水化模型的水泥水化動力學(xué)研究[J];混凝土;2010年06期

9 吳笑梅,樊粵明,郭文瑛;不同粉磨工藝水泥的顆粒、礦物組成分布及性能(英文)[J];華南理工大學(xué)學(xué)報(自然科學(xué)版);2004年08期

10 張力冉;王棟民;劉治華;石晶;郝兵;張偉利;;水泥細(xì)度對新拌水泥漿體多級絮凝結(jié)構(gòu)的影響[J];商品混凝土;2011年11期

相關(guān)博士學(xué)位論文 前1條

1 張同生;水泥熟料與輔助性膠凝材料的優(yōu)化匹配[D];華南理工大學(xué);2012年

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