| 膨胀土作二灰土的方法及机理 |
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| 引用本文： | 徐宏,邓学钧,倪富健.膨胀土作二灰土的方法及机理[J].北京工业大学学报,2009,35(7):947-952. |
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| 作者姓名： | 徐宏 邓学钧 倪富健 |
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| 作者单位： | 东南大学交通学院,南京,210096;东南大学交通学院,南京,210096;东南大学交通学院,南京,210096 |
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| 基金项目： | 国家自然科学基金资助项目(60472120) |
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| 摘 要： | 通过进行石灰改性膨胀土的室内试验、机理分析、膨胀土作二灰土的配合比设计、试验路铺筑及施工工艺研究,得出:石灰改性膨胀土机理主要体现在3个方面,即石灰在水溶液中的解离作用,离子交换作用和絮凝团聚作用,以及少量的石灰结晶作用和碳化作用;在现场施工中可采用适量生石灰对膨胀土进行闷料改性,改性生石灰换算成消石灰与干土的质量比一般为4%,现场改性时间为7d左右.改性膨胀土作二灰土具有较高的早期强度,压实成型后具有良好的水稳性;石灰、干土的质量比是其干缩性能的主要影响因素.
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| 关 键 词： | 调 道路工程 机理分析 配合比 施工工艺 膨胀土 二灰土 |
Method and Mechanism of Lime-flyash Stabilized Soils Used by Expansive Soil |
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| XU Hong,DENG Xue-jun,NI Fu-jian.Method and Mechanism of Lime-flyash Stabilized Soils Used by Expansive Soil[J].Journal of Beijing Polytechnic University,2009,35(7):947-952. |
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| Authors: | XU Hong DENG Xue-jun NI Fu-jian |
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| Affiliation: | Transportation College;Southeast University;Nanjing 210096;China |
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| Abstract: | In many regions of our country,during design & construction of highway subbases,it often meets expansive soils which are not be the suitable soil source used directly for lime-flyash stabilized soils.In order to satisfy the requirement of engineering constructions,usually the method of lime modified soils are adopted.The mechanism analysis of expansive soils modified by lime,design of lime-flyash stabilized soils used by expansive soil,and trial road pavement and construction technology study have been cond... |
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| Keywords: | road engineering mechanism analysis mixing ratio construction technology expansive soil lime-flyash stabilized soil |
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