利用工厂水泥窑灰和屋面板瓦等废物来提高道路工程中土壤的性能毕业论文文献翻译中英文对照精选.doc

Use of Factory-Waste Shingles and Cement Kiln Dust to Enhance the Performance of Soil Used in RoadWorks An experimental work was conducted to study the use of factory-waste roof shingles to enhance the properties of fine-grained soil used in road works. Cement kiln dust (CKD), a cogenerated product of Portland cement manufacturing, was used as a stabilizing agent while the processed shingles were added to enhance the soil tensile strength. The effects of shingles on strength and stability were evaluated using the unconfined compressive strength, splitting tensile strength, and California Bearing Ratio (CBR) tests.The results showed that the use of CKD alone resulted in a considerable increase in the unconfined compressive strength but hada small effect on the tensile strength. The addition of shingles substantially improved the tensile strength of the stabilized soil. A significant reduction in the capillary rise and a slight decrease in the permeability were obtained as a result of shingle addition. An optimal shingle content of 10% is recommended to stabilize the soil. Copyright ? 2009 Aly Ahmed et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1. Introduction Extensive research has been performed during the past two decades to protect the environment. The use of waste materials in construction applications has many environmental benefits including costs saving in terms of their disposal and potential recyclability. Examples of such waste materials include factory-waste roof shingles and cement kiln dust (CKD). Roof shingles are primarily composed of asphalt binder, hard rock granules/fillers, and fibers. There are two types of shingles: organic and glass. Organic shingles are made on a thick felt of wood and other cellulose fibers. Glass shingles are made on a mat of nonwoven glass fibers, w