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首页> 外文会议>GeoCongress 2008 >GEOTECHNICAL PROPERTIES OF PALOUSE LOESS MODIFIED WITH CEMENT KILN DUST AND PORTLAND CEMENT
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GEOTECHNICAL PROPERTIES OF PALOUSE LOESS MODIFIED WITH CEMENT KILN DUST AND PORTLAND CEMENT

机译：水泥窑粉和硅酸盐水泥改性的高岭土黄土的力学性能

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Cement Kiln Dust (CKD) is a powdery by-product of the Portland cement manufacturing process. High disposal costs coupled with a shortage in landfill space has prompted recent search into alternative uses of CKD. The beneficial chemical and physical properties of CKD offer its potential to stabilize marginal soils. This paper presents some results of the investigation into the engineering properties of Palouse Loess soil modified with varying amounts of CKD. The results are compared with the same soil modified using Portland cement.The addition of CKD and Portland cement is found to increase the optimum water content but to decrease the maximum dry unit weight of the mix soils. Their addition also resulted in significant improvement in unconfined compressive strength and modulus of elasticity. CKD also has high surface area which facilitates the absorption of water off soil particles. This would be beneficial for field compaction of wet soils. Results of Atterberg limit tests showed that plasticity index increased initially, but decreased at higher percentage of additives.
机译：水泥窑粉尘（CKD）是波特兰水泥生产过程中的粉末状副产品。高昂的处置成本，再加上垃圾填埋场的短缺，促使人们最近对CKD的替代用途进行了研究。 CKD的有益化学和物理特性为其稳定边缘土壤提供了潜力。本文介绍了对不同CKD量改性的帕卢斯-黄土土的工程特性进行研究的一些结果。将结果与使用波特兰水泥改性的相同土壤进行比较。 发现添加CKD和波特兰水泥可增加最佳含水量，但会降低混合土的最大干重。它们的加入还导致无侧限抗压强度和弹性模量的显着改善。 CKD还具有高表面积，有利于水分从土壤颗粒中吸收。这对于湿土的现场压实将是有益的。 Atterberg极限测试的结果表明，可塑性指数最初增加，但在添加剂百分比更高时下降。

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