Ultrathin composite structure layer for preventing reflection cracks and preparation method of ultrathin composite structure layer

Abstract

The invention discloses an ultrathin composite structure layer for preventing reflection cracks and a preparation method of the ultrathin composite structure layer. The ultrathin composite structure layer comprises an anti-sliding high-strength geogrid layer, a lower toughening type epoxy asphalt layer, a lower graded macadam layer, an upper reinforced type epoxy asphalt layer and an upper graded macadam layer which are arranged on a cement pavement from bottom to top in sequence. The composite structure layer disclosed by the invention is a complex and solid interlocking system which is excellent in anti-pull, anti-shearing, adhesive and waterproof property, has very good tensile, anti-shearing and stress absorption functions when strain is relatively small, is capable of effectively reducing reflection cracks of an additionally paved asphalt concrete layer on the cement pavement and effectively reducing the self-weight, and is relatively low in thickness, good in stability, high in anti-sliding property and relatively long in service life, the preparation method of the composite structure layer is high in mechanical degree and high in feasibility, and the additionally paved asphalt concrete layer can be directly constructed on the prepared ultrathin composite structure layer.

Description

technical field [0001] The invention belongs to the technical field of transportation and relates to an ultra-thin composite structural layer and a preparation method thereof, in particular to an ultra-thin composite structural layer used for resisting reflection cracks between a cement pavement and an asphalt concrete overlay layer and a preparation method thereof . Background technique [0002] Cement pavement is one of the main pavement structures of various highways in my country. As a rigid pavement with strong load-dispersing capacity, it has superior performance. Most of the cement pavement constructed in the early stage has reached or exceeded its service life, and there are various degrees of disease. The general maintenance measures can no longer meet the requirements of the pavement, and it needs to be rebuilt or paved. As a common cement pavement reconstruction scheme, asphalt concrete overlay can significantly improve the performance of the original cement pave...

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Problems solved by technology

However, the existing geogrids have no significant interlocking effect on the soil, and are prone to horizontal slippage. The tensile strength, stability, and waterproof performance of the geogrid are also insufficient, and fractures often occur. or corrosion damage

[0006] Epoxy asphalt binder has high tensile strength, bonding strength and waterproof ability, and is widely used in the bonding layer of asphalt concrete pavement, but epoxy asphalt binder is used in cement pavement and asphalt concrete overlay The structural layer between the layers is rare, because the structural layer between the cement pavement and the asphalt concrete has higher requirements on the performance of its materials. The transition layer between the flexible pavement layers must have excellent tensile and shear properties, but the existing epoxy asphalt binder has a large elongation at break, and its toughness and strength cannot reach this structure. layer requirements

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