Application Research of Water-Washing Coal Gangue Roadbed Filling Material in Huaibei
WANG Feng
Abstract：In order to test the pavement performance of the water-washing coal gangue, a series of experiments are conducted for its chemical constituents, loss ratio on ignition, water absorption ratio, natural gradation, free swelling ratio, compaction characteristics and CBR value and so on of water-washing coal gangue in Huaibei.The research results show that the mass fraction of active constituents of volcanic ash is 84.7% in the water-washing coal gangue in Huaibei, other harmful constituents are very few, the loss ratio on ignition and water absorption ratio are very small, it has a nice natural gradation and the free swelling ration is about 9%;the mass fraction of the best water ratio is 5.3%, the largest dry density is 2.21 g/cm3, and the CBR value is 32.5%, so it can be used as the roadbed filling material;after adding soil the CBR value greatly increases, and when the soil-added amount is at 30%, the CBR value is up to 70%, meeting the requirements of the roadbed wrapping material.
Keywords：water-washing coal gangueroadbed fillingwrapping methodCBRgradation
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 52-57 )