Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel
Red clay cannot be used as embankment filler directly due to its water-sensitive property. Gravel is usually added into red clay to enhance its performance in engineering practice. In order to investigate the influence of mixtures of red clay and gravel on the road performance, gravitational compact...
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Series: | Advances in Civil Engineering |
Online Access: | http://dx.doi.org/10.1155/2018/8079379 |
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doaj-050a5127b2814117bd95cda7cc88f8ff2020-11-24T21:08:46ZengHindawi LimitedAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/80793798079379Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and GravelBiao Zeng0Lin-feng Wang1Yun Tian2Tao-rui Zeng3Bing Li4Key Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway of Chongqing Municipal Education Commission, Chongqing Jiaotong University, Chongqing, ChinaKey Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway of Chongqing Municipal Education Commission, Chongqing Jiaotong University, Chongqing, ChinaKey Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway of Chongqing Municipal Education Commission, Chongqing Jiaotong University, Chongqing, ChinaKey Laboratory of Geological Hazards Mitigation for Mountainous Highway and Waterway of Chongqing Municipal Education Commission, Chongqing Jiaotong University, Chongqing, ChinaChina Communication South Road and Bridge Company, Ltd., Beijing, ChinaRed clay cannot be used as embankment filler directly due to its water-sensitive property. Gravel is usually added into red clay to enhance its performance in engineering practice. In order to investigate the influence of mixtures of red clay and gravel on the road performance, gravitational compaction experiment of red clay and vibratory compaction experiment of mixtures of red clay and gravel were conducted, respectively. The results indicate that compaction curves of red clay have double peak; the second peak is the real maximum dry density, and its corresponding moisture content is the optimal moisture content. The dry density of mixtures of red clay and gravel is influenced by the content of gravel, vibration frequency, and vibration time. The optimal content of gravel is 30%, the best vibration frequency is 45 Hz, and the optimal vibration time is 5 minutes for the mixtures of red clay and gravel in this study. The effectiveness of optimal content of gravel and optimum vibration parameters was confirmed by a CBR test. According to the compaction experiment results and actual situation in the field, a suitable construction method of subgrade using the mixtures of red clay and gravel was put forward. The feasibility of this method was also confirmed by postconstruction deformation data of the field test embankment.http://dx.doi.org/10.1155/2018/8079379 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Biao Zeng Lin-feng Wang Yun Tian Tao-rui Zeng Bing Li |
spellingShingle |
Biao Zeng Lin-feng Wang Yun Tian Tao-rui Zeng Bing Li Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel Advances in Civil Engineering |
author_facet |
Biao Zeng Lin-feng Wang Yun Tian Tao-rui Zeng Bing Li |
author_sort |
Biao Zeng |
title |
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel |
title_short |
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel |
title_full |
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel |
title_fullStr |
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel |
title_full_unstemmed |
Study on Compaction Characteristics and Construction Control of Mixtures of Red Clay and Gravel |
title_sort |
study on compaction characteristics and construction control of mixtures of red clay and gravel |
publisher |
Hindawi Limited |
series |
Advances in Civil Engineering |
issn |
1687-8086 1687-8094 |
publishDate |
2018-01-01 |
description |
Red clay cannot be used as embankment filler directly due to its water-sensitive property. Gravel is usually added into red clay to enhance its performance in engineering practice. In order to investigate the influence of mixtures of red clay and gravel on the road performance, gravitational compaction experiment of red clay and vibratory compaction experiment of mixtures of red clay and gravel were conducted, respectively. The results indicate that compaction curves of red clay have double peak; the second peak is the real maximum dry density, and its corresponding moisture content is the optimal moisture content. The dry density of mixtures of red clay and gravel is influenced by the content of gravel, vibration frequency, and vibration time. The optimal content of gravel is 30%, the best vibration frequency is 45 Hz, and the optimal vibration time is 5 minutes for the mixtures of red clay and gravel in this study. The effectiveness of optimal content of gravel and optimum vibration parameters was confirmed by a CBR test. According to the compaction experiment results and actual situation in the field, a suitable construction method of subgrade using the mixtures of red clay and gravel was put forward. The feasibility of this method was also confirmed by postconstruction deformation data of the field test embankment. |
url |
http://dx.doi.org/10.1155/2018/8079379 |
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