Assembled type anti-shear asphalt pavement and laying method thereof

Abstract

The invention relates to an asphalt pavement structure and a construction method thereof, specifically to an assembled type anti-shear asphalt pavement and a laying method thereof. The assembled type anti-shear asphalt pavement comprises the following structural courses which are laid in sequence from top to bottom, wherein the structural courses are a (3.5-4.5) cm wearing course, which is waste tire rubber powder and SBS composite modified stone mastic asphalt mixture SMA-13, a waterproof adhesive course and a bearing course, which is modified emulsified asphalt and cement composite grouting asphalt mixture SFC-20. The assembled type anti-shear asphalt pavement has the advantages of good integral strength, good flexibility, long fatigue life, good crack resistance, convenient construction and maintenance, short construction period and less construction pollution.

Description

technical field [0001] The invention relates to a structure and a construction method of an asphalt pavement, in particular to an assembled shear-resistant asphalt pavement and a paving method thereof. Background technique [0002] Asphalt concrete is a kind of flexible material. Under the repeated action of heavy load and strong shear stress, the thickness of the asphalt layer at the wheel track gradually becomes thinner, and rutting appears on the road surface after the accumulation of permanent deformation, which weakens the overall strength of the surface layer and pavement structure. , and easily induce other diseases. Especially at urban traffic light intersections, bus stops, road intersections and expressway toll stations, due to frequent vertical and horizontal loads such as vehicle starting, acceleration, deceleration, braking, etc., the asphalt pavement is prone to severe waves, hugging, etc. , rutting and other shear deformation or vertical deformation diseases....

AI Technical Summary

Problems solved by technology

However, this composite pavement is composed of asphalt mixture (flexible frame) and cement mortar (rigid filler). After frequent wheel shear stress, temperature shrinkage changes and dynamic water action, the flexible frame and The rigid filler will peel off, and the overall mechanical properties, water stability and fatigue life of the composite structure will be greatly reduced; in addition, the flexibility of the composite pavement depends on the strain borne by the large-void asphalt mixture, and the coarse-void asphalt mixture in the large-void asphalt mixture The aggregate content is as high as 90%, which determines the maximum bending and tensile strain of the mixture. The mortar composed of fine aggregate and asphalt has a low content. Under the action of temperature stress and reflection damage of the pavement base, the composite pavement is prone to fatigue cracking ; In addition, this composite pavement is constructed by the on-site method, and the formation of cement mortar strength requires a long curing period and cumbersome curing conditions, causing the normal traffic of the road surface to be blocked and the construction period to be greatly delayed

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