本文關(guān)鍵詞： 助磨劑 粒度分布 大石灰石摻量 水化熱 XRD SEM　出處：《廣西大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：在節(jié)能減排的大環(huán)境下,水泥中混合材的摻入量越來越大,由于石灰石具有很高的性價比,因此首當(dāng)其沖的作為主要的混合材添加到水泥當(dāng)中去。本課題研究大摻量石灰石專用助磨劑的對高摻量石灰石PC水泥組成分布和性能的影響,探索加入助磨劑前后影響水泥水化的可能因素。采用激光粒度儀、X射線衍射儀、熱分析儀、自制電導(dǎo)率儀、自制水化熱儀、掃描電鏡等儀器設(shè)備進(jìn)行各個方面的性能的探究。實驗主要對摻入大摻量石灰石專用助磨劑與未摻助磨劑粉磨的水泥試樣進(jìn)行性能方面的對比研究。結(jié)果表明,摻有大摻量石灰石專用助磨劑試樣的各水化齡期強(qiáng)度均有提高,流動性增加了,凝結(jié)時間縮短了,但對稠度的影響不大。大摻量石灰石專用助磨劑有很好的集中顆粒的效果,適當(dāng)?shù)难娱L粉磨時間,可以使得顆粒更加集中,且峰值會朝向細(xì)顆粒方向移動,有利于水泥水化。實驗中還發(fā)現(xiàn),早期水化放熱不是影響漿體流動性的主要原因,水泥顆粒的形貌和粒徑分布才是主要的影響因素；對強(qiáng)度的影響不取決于水化進(jìn)程,強(qiáng)度的增加主要受到的是水化產(chǎn)物的種類和形態(tài)的影響。大摻量石灰石專用助磨劑對PC水泥中的熟料、石灰石等混合材均有一定的粉磨效果,并且粉磨顆粒以活性較高的多菱角狀居多。
[Abstract]:In the environment of energy saving and emission reduction, the mixing amount of cement is more and more large, because limestone has a very high performance and price ratio. Therefore, the first to be added to the cement as the main mixture. This paper studies the influence of high content limestone special grinding aids on the composition distribution and properties of high content limestone PC cement. The possible factors affecting the hydration of cement before and after the addition of grinding aids were explored. X-ray diffractometer, thermal analyzer, self-made conductivity meter and self-made hydration calorimeter were used. Scanning electron microscope and other instruments were used to explore the performance of various aspects. The experiment mainly studied the performance of cement samples mixed with large amount of limestone special grinding aids and those without grinding aids. The results show that. The hydration age strength, fluidity and setting time of the samples with large amount of limestone special grinding aids have been increased, and the setting time has been shortened. However, there is little effect on consistency. Large amount of limestone special grinding aids have a good effect on the concentration of particles. By prolonging the grinding time properly, the particles can be more concentrated and the peak value will move towards the direction of fine particles. It is also found that the early hydration heat release is not the main reason to affect the slurry fluidity, and the morphology and particle size distribution of cement particles are the main influencing factors. The effect on strength is not dependent on the hydration process. The increase of strength is mainly affected by the types and forms of hydration products. The mixture of limestone and other materials has certain grinding effect, and the grinding particles are mostly multi-rhombic with higher activity.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TQ172.1

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