| 固化疏浚淤泥作路基材料工程特性试验研究 |
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| 引用本文： | 丁慧,孙秀丽,刘文化,张志超,张伟,宋碧颖. 固化疏浚淤泥作路基材料工程特性试验研究[J]. 重庆建筑大学学报, 2017, 39(2): 11-18 |
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| 作者姓名： | 丁慧 孙秀丽 刘文化 张志超 张伟 宋碧颖 |
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| 作者单位： | 江南大学 环境与土木工程学院, 江苏 无锡 214122,江南大学 环境与土木工程学院, 江苏 无锡 214122,江南大学 环境与土木工程学院, 江苏 无锡 214122,江南大学 环境与土木工程学院, 江苏 无锡 214122,江南大学 环境与土木工程学院, 江苏 无锡 214122,江南大学 环境与土木工程学院, 江苏 无锡 214122 |
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| 基金项目： | 国家自然科学基金（51609102）；大连理工大学海岸和近海工程国家重点实验室开放基金（LP1613）；国家级大学生创新训练（201510295065） |
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| 摘 要： | 为了探讨粉煤灰和工业矿粉固化疏浚淤泥作路基材料的可行性，通过一系列室内实验研究了不同固化剂配比对固化淤泥击实特性、水稳定性、承载力和抗剪强度的影响。实验结果表明，不同固化剂配比下固化淤泥的最大干密度均超过1.50 g/cm3，最优含水率约为20~21%；淤泥固化处理后浸水4 d的膨胀率均不超过1.1%，水稳性大幅提升；矿粉含量越高，粉煤灰含量越低，CBR（California Bearing Ratio）值越高，土样的承载力越高，抗剪强度也越高。不同工况浸水4 d的CBR值均达到了较高的水平，工况SD10FA20MP（淤泥：粉煤灰：矿粉=7：1：2）CBR值最高，达到了34.8%，是规范中高速、一级公路路基填料要求最低CBR值的4.35倍，作路基填料使用可行。
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| 关 键 词： | 固化 疏浚淤泥 粉煤灰 矿粉 抗剪强度 路基填料 |
| 收稿时间： | 2016-06-27 |
Experimental analysis of engineering properties of solidified sludge as roadbed filling material |
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| Ding Hui,Sun Xiuli,Liu wenhu,Zhang Zhichao,Zhang wei and Song biying. Experimental analysis of engineering properties of solidified sludge as roadbed filling material[J]. Journal of Chongqing Jianzhu University, 2017, 39(2): 11-18 |
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| Authors: | Ding Hui Sun Xiuli Liu wenhu Zhang Zhichao Zhang wei Song biying |
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| Affiliation: | School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China,School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China,School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China,School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China,School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China and School of Environment and Civil Engineering, Jiangnan University, Wuxi 214000, Jiangsu, P. R. China |
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| Abstract: | To discuss the feasibility of using the fly ash and industrial slag solidified dredged sluge as roadbed material, a series of laboratory tests were performed to investigate the effect of curing agent ratios on the compaction properties, water stability, bearing capacity and shear strength. The test results showed that the maximum dry density of the solidified sludge with different curing agent ratios are higher than 1.50 g/cm3, and the optimum moisture content are about 20%~21%. The soaking induced expansion rate with the soaking time of 4 days are less than 1.1%, which indicates the water stability are ameliorated after solidification. With the decrease of fly ash and the increase of mineral powder, the CBR(California bearing ratio) and the shear strength are greatly increased. The solidified sludge with different curing agent ratios have high CBR after soaking for 4 days. The sample of SD10FA20MP has the highest CBR (34.8), which is 4.35 times of lowest requirement of roadbed filling of highway. It is concluded that it is feasible to use the fly ash and industrial slag solidified dredged sludge as roadbed filling material. |
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| Keywords: | solidification dredged sludge fly ash mineral powder shear strength roadbed filling material |
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