| 路用粉煤灰外加剂作用原理 |
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| 引用本文： | 张超.路用粉煤灰外加剂作用原理[J].长安大学学报(自然科学版),2010(2). |
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| 作者姓名： | 张超 |
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| 作者单位： | 长安大学特殊地区公路工程教育部重点实验室; |
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| 摘 要： | 针对碳酸钠和硫酸钠能够显著提高石灰粉煤灰基层材料早期强度的特点,分析了这2种化学外加剂对石灰粉煤灰混合料强度形成的影响规律,通过外加剂在粉煤灰中的化学反应过程,从机理上阐述2种外加剂对粉煤灰的作用原理及其效果差别。分析结果表明:2种外加剂依靠不同方法产生的碱性条件,在对粉煤灰起到激发效果并促进二灰材料之间相互作用的同时,还分别通过生成水稳性更强的碳酸钙和钙矾石的方式,促进二灰材料早期强度的形成;外加剂还能以化学催化的方式加速二灰材料早期强度的形成。
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| 关 键 词： | 道路工程 半刚性基层 二灰基层材料 外加剂 作用原理 催化作用 |
Action principle analysis on admixtures used for mixture of lime fly-ash |
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| ZHANG Chao.Action principle analysis on admixtures used for mixture of lime fly-ash[J].JOurnal of Chang’an University:Natural Science Edition,2010(2). |
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| Authors: | ZHANG Chao |
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| Institution: | ZHANG Chao(Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang\'an University,Xi\'an 710064,Shaanxi,China) |
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| Abstract: | According to the characteristics that admixtures of sodium carbonate and sodium sulfate can promote early stage strength formation of lime-fly-ash mixture,the reaction principles and differences for this process are explained with chemical reaction theory.The results of theoretical analysis consider that the condition of fly-ash can be excited and its stabilized composition structure can be depolymerized with alkalinity released by admixtures in different ways to form early stage strength.Meanwhile,the reac... |
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| Keywords: | road engineering semi-rigid base course lime-fly-ash mixture for road base admixture acting principle catalytic action |
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