Construction method of crack-resisting cement stabilized crushed stone base course

Abstract

The invention discloses a construction method of a crack-resisting cement stabilized crushed stone base course. The problems that at present, contraction fissures of a traditional cement stabilized crushed stone are many, the surface is prone to loosening after freeze-thaw, the defects of the construction mode exist in the construction side, and therefore large-area cracks and freeze-thaw are generated in the subsequent process of the road surface are solved. According to the key points of the technical scheme, the construction method comprises the following steps that (a), the crack-resisting cement stabilized crushed stone base course comprises a collected material, 3%-5% of cement and water, the curve of the screen hole size of the collected material and the passing percentage is in an S shape; (b), a mixture is mixed; (c), the mixture is conveyed; (d), the mixture is paved, specifically, square timber cushion blocks are put under a paver screed plate in advance, and mixture paving adopts two pavers to synchronously operate in an echelon formation mode; (e), the mixture is grinded; and (f), curing is conducted, specifically, a curing film or geotechnical cloth is covered to conduct hydrating curing, so that the surface of the cement stabilized course keeps a moist state all the time, and the cement stabilized crushed stone base course with the crack-resisting property being obviously improved is obtained.

Description

Technical field [0001] The invention relates to the field of engineering construction, in particular to a construction method for crack-resistant cement stabilized crushed stone base. Background technique [0002] With the rapid development of highway industry, cement stabilized macadam is widely used as the base layer of highway pavement due to its good mechanical properties, board properties, water stability and frost resistance. Although it has many advantages, it is impossible to avoid the cracks of cement stabilized macadam base layer due to its own cold shrinkage and dry shrinkage. Once a crack is formed, it will inevitably affect the performance of the surface layer and base layer, leaving hidden dangers to the project. In the construction process, the aggregate gradation is the most important factor affecting the strength, dry shrinkage, temperature shrinkage and durability of the cement stabilized macadam base, and it is also the core content of the mix composition desi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cement-stabilized macadam base construction method that can well solve the traditional large-area cracks and loosening problems caused by freezing and thawing, and has significantly improved crack resistance.

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