Study On Engineering Characteristics Of Red Argillaceous Sandstone As The Road Construction Materials

The paper mostly studies on engineering geological characteristics and road construction capabilities of Mesozoic and Cenozoic red sandstone in the area of Huanshan, which will be used as the filler of speedway roadbed, in the south of Anhui. Firstly, based on the analysis of geological construct background and characteristics of the area of Huanshan, discusses the sedimentary environment and the rule of distribution of red sandstones in the area. Secondly, according to the relationship between the red sandstone's characteristics in intenerate and collapse and its structure, mineral composition and characters in physics and mechanics, the author designs a series of collapse tests, observes the course of red sandstones' collapse, and analyses the collapse mechanism of red sandstones and its collapse soil's road capabilities. Finally, by testing the collapse substance's characters in physics and mechanics and road capabilities, the paper studies the feasibility to use the red sandstones' collapse substance as the filler of speedway's roadbed. The result indicates that, if we make use of the characteristics of red sandstones' collapsibility, we can control and expedite its collapse to improve work efficiency. And based on the engineering characteristics of red sandstone, we study the construction technics to improve road capabilities of its collapse soil to conform to the requirements of the standard or rule, then to control and ensure engineering quality. The paper resolves the engineering geological problems of using red sandstones as the filler of speedway's roadbed.