Construction method of expressway stone mastic asphalt (SMA) road surface

Abstract

The invention discloses a construction method of an expressway stone mastic asphalt (SMA) road surface. An expressway is divided into a plurality segments for pavement. The construction method of theexpressway SMA road surface comprises the following steps that S1, a roadbed is paved, the roadbed is rolled by adopting a heavy road roller, the roadbed is measured by a three-meter ruler method, andthe flatness of the roadbed is controlled as 8mm; S2, first pavement is carried out, specifically, the expressway is divided into two same columns for pavement according to the width, and a paver with a lengthened screed plate is used for paving asphalt fillers on the roadbed for each column; and second pavement is carried out, specifically, the expressway is divided into odd number columns for pavement according to the width, separately recorded as a middle column and two-side columns, and each paver is used for paving the asphalt fillers on the road surface of the asphalt fillers paved forthe first time for each column; S3, the road surface is rolled; and S4, when the temperature of the asphalt fillers lowers below 50 DEG C, the SMA road surface is formed. The construction method of the expressway SMA road surface has the effect of reducing cracking probability occurring at seams of the expressway SMA road surface.

Description

technical field [0001] The invention relates to the field of road construction. More specifically, the present invention relates to a construction method for expressway SMA pavement. Background technique [0002] Stone Mastic Asphalt (SMA for short) is composed of asphalt binder, a small amount of fiber stabilizer, fine aggregate and a large amount of filler (mineral powder) filled with asphalt mastic in discontinuous grade The gap between the coarse aggregate skeleton is used to form an integrated asphalt mixture. It has high temperature resistance, low temperature stability, good water stability, good durability and surface functions (anti-slip, small rutting, high flatness, noise, etc.) small, good visibility), and now the transportation industry is becoming more and more developed, the frequency of transportation is increasing year by year, and the requirements for the carrying capacity of expressways are also getting higher and higher. The technical requirements are h...

AI Technical Summary

Problems solved by technology

[0002] Stone Mastic Asphalt (SMA for short) is composed of asphalt binder, a small amount of fiber stabilizer, fine aggregate and a large amount of filler (mineral powder) filled with asphalt mastic in discontinuous grade The gap between the coarse aggregate skeleton is used to form an integrated asphalt mixture. It has high temperature resistance, low temperature stability, good water stability, good durability and surface functions (anti-slip, small rutting, high flatness, noise, etc.) small, good visibility), and now the transportation industry is becoming more and more developed, the frequency of transportation is increasing year by year, and the requirements for the carrying capacity of expressways are also getting higher and higher. The process requirements are high, and the construction method will cause large fluctuations in the quality of the pavement, which is prone to pits, looseness, peeling, cracking, and subsidence, especially at the joints of the pavement

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