Red sandstone fully-weathered substance-based high-compactness filler and preparation method thereof

Abstract

The invention discloses a red sandstone fully-weathered substance-based high-compactness filler and a preparation method thereof. The red sandstone fully-weathered substance-based high-compactness filler comprises mixed coarse-grained soil and red sandstone fully-weathered substance crushed particles, the mixed coarse particle soil comprises coarse sand with the particle size of 0.5 mm to 2 mm, fine gravel with the particle size of 2 mm to 5 mm and medium gravel with the particle size of 5 mm to 20 mm; the mass ratio of the coarse sand to the fine gravel to the medium gravel is 1: 2: 3. The mixed coarse-grained soil and red sandstone fully-weathered crushed particles are mixed according to a certain proportion, and the mixed filler which is good in occlusion effect and easy to compact is obtained. Compared with other improved schemes, the engineering investment cost can be effectively saved according to the blending proportion of the raw materials in the red sandstone fully-weathered substance-based high-compactness filler provided by the invention; and the scheme of remote transportation of high-quality filler can be replaced, so that the construction cost is saved, the construction efficiency is improved, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of highway engineering roadbed filler improvement, and in particular relates to a red sandstone full-weathered-based high compaction filler and a preparation method thereof. Background technique [0002] The red bed in the southwest region is the most widely distributed and most representative red bed sand-mudstone in China. It is mainly composed of Jurassic and Cretaceous strata, with a small amount of Early Tertiary strata. However, due to the weak inter-particle cohesion after the weathering and disintegration of the red sand mudstone and the uniform particle size, it is difficult to form the inter-particle occlusion effect. When it is used as the roadbed filler, the compaction degree under the action of the vibratory roller is difficult to reach 93% above. Therefore, it is difficult to obtain materials locally when the subgrade compaction degree of expressway engineering projects requires 93% or more of...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a red sandstone fully weathered material-based high-compactness filler and its preparation method, which solves the outstanding contradiction that red sandstone is widely distributed in the southwest mountainous area and lacks high-quality fillers, and coarse-grained soil with the least economic cost Blending scheme to meet roadbed compaction requirements

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