Roadbed filling material using red sandstone and production method thereof

Abstract

The invention relates to a roadbed filling material using red sandstone and a production method thereof. The roadbed filling material is prepared from the following raw materials in percentage by mass: 25 to 35 percent loess and the balance of the red sandstone, wherein the water content of the roadbed filling material is 6 to 10 percent. The corresponding production method comprises the followingsteps of weighing the loess and the red sandstone according to a mixing proportion; sufficiently rolling and crushing the red sandstone, then uniformly mixing with the loess, and measuring the watercontent of a mixed material; with reference to a relationship between the water content and a preset water content range, taking a sun-curing and air-drying or water sprinkling treatment measure to enable the water content of the mixed material to be in the preset water content range, so that the roadbed filling material is obtained. According to the roadbed filling material, the red sandstone isimproved by adopting the loess to enable the roadbed filling material to become a high-quality filling material which is up to a roadbed filling standard; the roadbed filling material is high in maximum dry density, good in compaction effect and further low in engineering cost; the characteristic that the red sandstone is poor in engineering property is effectively overcome; making waste profitable is realized for the red sandstone and the roadbed filling material has enormous economic benefit and the significance of protecting an ecological environment.

Description

technical field [0001] The invention relates to the technical field of backfill soil improvement, in particular to a roadbed filler using red sandstone and a manufacturing method thereof. Background technique [0002] Red sandstone is widely distributed in my country. With the continuous development of my country's infrastructure, it is inevitable to build roads, underground rail transit and other projects in red sandstone areas. Previously, scholars at home and abroad have made some explorations on the engineering geological characteristics of red sandstone. While revealing the lithological characteristics of various red sandstones, they have also analyzed the failure mechanism of red sandstone. System awareness and in-depth research. [0003] At present, the construction of the subway in Lanzhou has just kicked off, and with the excavation of the deep foundation pit of the Lanzhou subway, how to deal with the large amount of red sandstone encountered has become a difficul...

AI Technical Summary

Problems solved by technology

However, the red sandstone encountered in the Lanzhou area has poor diagenesis. It is easy to soften and appear as loose sand when it encounters water or disturbance. The exposed surface is very easy to weather and disintegrate. These characteristics make red sandstone a bad roadbed filler. The impact of urban traffic tracks is huge, and the amount of excavation of the roadbed is large. In order to protect the ecological environment and reduce engineering consumption, the natural soil is often improved to make it a high-quality filler for roadbed filling standards.

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