Stone mastic asphalt (SMA) pavement construction method

Abstract

The invention provides a stone mastic asphalt (SMA) pavement construction method. The method comprises the following steps of determining mineral aggregate gradation and the optimal asphalt-aggregate ratio of SMA raw materials, carrying out bonding construction on a lower bearing layer, mixing the SMA raw materials, wherein an asphalt heating temperature is in a range of 170-180 DEG C, an aggregate heating temperature is in a range of 185-195 DEG C and a discharging temperature is in a range of 175-185 DEG C, spreading the materials, wherein a factory temperature is in a range of 170-185 DEG C, an attendance temperature is greater than or equal to 170 DEG C and a spreading temperature is greater than or equal to 170 DEG C, carrying out rolling compaction by primary rolling compaction, secondary rolling compaction and final rolling compaction, wherein a primary rolling compaction temperature is greater than or equal to 160 DEG C, a secondary rolling compaction temperature is greater than or equal to 140 DEG C and the final rolling compaction is greater than or equal to 120 DEG C, and opening to traffic when the pavement temperature is less than 50 DEG C. The method realizes temperature control from stirring to rolling compaction and eliminates temperature influence on construction.

Description

technical field [0001] The invention relates to the technical field of road construction, and more specifically, relates to a method for constructing an SMA asphalt mixture road surface. Background technique [0002] The traffic flow and driving frequency of modern highways and roads are increasing rapidly, and the axle load of freight vehicles is increasing continuously. Ordinary asphalt roads and roads are extremely prone to potholes and cracks. Therefore, it is required to further improve the anti-flow performance of the road surface, that is, anti-rutting under high temperature The ability to improve flexibility and elasticity, that is, the ability to resist cracking at low temperatures; improve wear resistance and prolong service life. SMA (Stone Mastic Asphalt, referred to as SMA) asphalt mastic macadam mixture is a kind of asphalt mastic filled intermittently graded coarse aggregate composed of asphalt, fiber stabilizer, mineral powder and a small amount of fine aggre...

AI Technical Summary

Problems solved by technology

[0003] However, the construction technology requirements of SMA are high, and the sensitivity to construction factors is strong. During the construction process, the temperature is not easy to control, and the fluctuation and change of mineral material gradation and asphalt dosage will easily cause large fluctuations in the quality of SMA, which will cause local flooding. Oil, oil spots, water penetration, etc.

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