| 改性污泥用作填埋场中间覆盖层的适用性探讨 |
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| 引用本文： | 李丰,贺晓帅,胡景玄.改性污泥用作填埋场中间覆盖层的适用性探讨[J].城市环境与城市生态,2014(3):35-38. |
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| 作者姓名： | 李丰 贺晓帅 胡景玄 |
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| 作者单位： | 河南省城乡建筑设计院有限公司;西安建筑科技大学建筑学院;河南六建建筑集团有限公司; |
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| 摘 要： | 为研究改性污泥作填埋场中间覆盖材料的长期性能,通过无侧限压缩试验和渗透试验,研究温度和渗滤液对污泥强度和渗透性能的影响。结果表明,温度升高,污泥的无侧限抗压强度下降,渗透系数增大;在自来水中浸泡一个月后,二者的渗透系数分别减小了14.3%和53.4%,污泥的无侧限抗压强度下降了14.3%,而在渗滤液中浸泡一个月后,污泥的无侧限抗压强度反而提高了91.1%。该改性污泥的强度和渗透性均满足作填埋场中间覆盖层的要求。
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| 关 键 词： | 填埋场 中间覆盖 温度 渗滤液 无侧限抗压强度 渗透系数 |
Applicability of Modified Sludge as Intermediate Cover of Landfill |
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| Institution: | LI Feng, HE Xiao-shuai, HU Jing-xuan ( 1. Urban and Rural Construction and Designing Institute of Henan Province Co., LTD. Zhengzhou 450000, China; 2. Institute of Architecture, Xi＇an University of Architecture and Technology, Xi＇an 710055,China; 3.Henan Sixth Construction Co., LTD., Luoyang, Henan 471000, China) |
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| Abstract: | To investigate the long-term performance of modified sludge as an intermediate cover,unconfined compressive tests and permeability tests were carried out to measure the changes of strength and permeability of the modified sludge at different temperatures.The results indicated that the unconfined compressive strength of the modified sludge was decreased and the coefficient of permeability of the modified was increased with the increase of temperature.After soaking in tap water or in leachate for one month,the both coefficient of permeability of the modified sludge were decreased by14.3% and 53.4%,respectively.The unconfined compressive strength of the modified sludge soaked in tap water decreased by 14.3%,while the unconfined compressive strength of the sludge soaked in leachate increased by 91.1%.The strength and permeability of the modified sludge can meet the requirements of intermediate cover of landfill. |
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| Keywords: | landfill intermediate cover temperature leachate unconfined compressive strength coefficient of permeability |
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