Asphalt-treated permeable-base (ATB) construction process

Abstract

The invention relates to an asphalt-treated permeable-base (ATB) construction process. The ATB construction process is characterized in that: each raw material is obtained in a way that: coarse aggregate comprises crushed limestone produced by an impact crusher, fine aggregate comprises the crushed limestone with the particle sizes of less than 2.36mm, and a filler is produced by levigating hydrophobic stones such as highly-basic rocks and the like in limestone or magmatite; the asphalt distribution of a prime coat is 0.6 to 1.2 L/m<2>, and the asphalt distribution of a seal coat is 0.8 to 1.0 L/m<2>; when an asphalt mixture is mixed, asphalt is heated at the temperature of 155 to 165 DEG C, the mineral aggregate is heated at the temperature of 170 to 190 DEG C, the mixture is produced at the temperature of 155 to 170 DEG C, and reduction in the mixture storage temperature is not more than 10 DEG C; when the asphalt mixture is transported and charged, a vehicle is required to be moved forwards and backwards to realize balanced charging, and the temperature of the mixture is not lower than 150 DEG C when arriving at a pavement site; the temperature of an asphalt mixture paver screed is not lower than 80 DEG C, and the mixture is paved at the temperature of not lower than 140 DEG C at the pavement speed of 3 to 5 m/min; and rolling compaction is performed by three rolling compaction stages. The ATB construction process is simple and convenient to construct, and ensures relatively lower cost and high performance.

Description

technical field [0001] The invention relates to an asphalt macadam base, in particular to an asphalt macadam base—ATB (Asphal t-Treated Permeable-Base) asphalt macadam base construction technology, which is a flexible structure base construction process. Background technique [0002] The base layer is the main load-bearing layer in the pavement structure, which mainly bears the vehicle load transmitted from the surface layer and spreads into the subgrade, so as to spread the load on the road surface, reduce the deformation of the road surface, and prevent or slow down the occurrence of road surface diseases. The base layer should have sufficient strength and stability. The main disadvantages of the semi-rigid base structure currently used are the large amount of semi-rigid material shrinkage (temperature shrinkage and dry shrinkage), poor water stability (fly ash gravel base) and other reasons, resulting in reflective cracks on the road surface, cracking, and chirping during...

AI Technical Summary

Problems solved by technology

The main disadvantages of the semi-rigid base structure currently used are the large amount of semi-rigid material shrinkage (temperature shrinkage and dry shrinkage), poor water stability (fly ash gravel base) and other reasons, resulting in reflective cracks on the road surface, cracking, and chirping during use. Pulp, loose and other damage phenomena seriously affect the use function of the pavement

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