A kind of lime-stabilized clay recycled powder mixture

Abstract

The present invention discloses a lime-stabilized clay recovered powder mixture including the following components by weight: 60-90 parts of clay, 10-40 parts of recovered powder, 8-15 parts of lime, and water, the mass of the added water accounts for 5-20% of the total mass of the clay, the recovered powder and the lime. The lime-stabilized clay recovered powder mixture has the following characteristics: 1, 7d unconfined compressive strength fully meets the standard requirements; 2, the compressive modulus of resilience is higher than that of ordinary lime-stabilized soil; 3, the volume stability is better than that of the ordinary lime-stabilized soil; with the increase of the recovered powder mixing content, reduction extent of the drying shrinkage of the product reaches 20.8-60.5%, and can effectively inhibit cracking caused by drying shrinkage. The lime-stabilized clay recovered powder mixture reduces the recovered powder deposition occupied land resources, protects environment, and can save the engineering materials and reduce project cost. In addition, the preparation and application technology of the lime-stabilized clay recovered powder mixture is same as the subbase process, and is convenient in popularization and application.

Description

technical field [0001] The invention relates to a pavement subbase mix, in particular to a lime-stabilized clay recovery powder mix which can be used as a road subbase, and belongs to the technical field of civil engineering materials. Background technique [0002] In the production process of asphalt mixture, the asphalt mixture mixing equipment needs to process the aggregate in multiple links such as loading, conveying, heating, stirring, etc., and produces a large amount of dust with a particle size of less than 0.075mm. If the dust is discharged into the atmosphere , not only pollute the environment, but also seriously endanger the health of operators. Therefore, asphalt mixing equipment needs to be equipped with a special dust removal and recovery system to extract the generated dust. This part of the extracted dust is called recycled powder. Since the relevant regulations in our country strictly limit the application of recycled powder in asphalt mixture, recycled pow...

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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention aims to solve the problem of cracking of lime-stabilized soil due to drying shrinkage during service, and provides a low-shrinkage lime-stabilized clay recovery powder with good mechanical properties and volume stability; at the same time It can also increase the added value of recycled powder products in asphalt mixing plants, and realize the purpose of saving natural resources and protecting the environment

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