Complex fiber roadbed thin felt

Abstract

The present invention discloses a complex fiber roadbed thin felt, including 40% to 60% of glass fiber short cutting silk by weight, 20% to 40% of polyester fiber short cutting silk by weight, and 18% to 30% of organic binder. The complex fiber roadbed thin felt is made from the glass fiber short cutting silk, the polyester fiber short cutting silk and the organic binder through a wet process, thus the felt is integrated with the advantage of the glass fiber thin felt and the polyester fiber thin felt, has adequate intensity, good flexibility, uniform thickness, easy impregnation, and high collapse property; the complex fiber roadbed thin felt is not only suitable for wide temperature range, also has low expansion coefficient, good stability, strong capacity for penetrating bitumen; a structural layer is formed after absorbing a bituminous material, thus the felt has water-proof, heat-proof and corrosion-proof physical characteristics, and very good associativity and is not liable to separate. The felt is suitable for building and reconstructing an old cement concrete pavement asphalt pavement; the repair maintenance of asphalt pavement facial cleft.

Description

Technical field: [0001] The invention relates to an asphalt road building material, in particular to a thin felt placed between a roadbed latex asphalt layer and an asphalt concrete layer. Background technique: [0002] In highway construction, more and more attention is paid to its service life and daily maintenance management. At present, high-grade highways have abandoned concrete pavement and adopted asphalt concrete pavement, which has a much better effect than cement material pavement. However, there are also some defects in the asphalt concrete pavement during actual use. The section of the asphalt concrete pavement is usually composed of a roadbed, an emulsified asphalt layer and an asphalt concrete layer from top to bottom. The function of bonding the roadbed and asphalt concrete, and the thickness of the emulsified asphalt layer is small, although the waterproof performance is better, it can better protect the roadbed under static load conditions to prevent water ...

AI Technical Summary

Problems solved by technology

In this way, although the anti-cracking ability of the pavement has been improved, due to the large spacing holes of the geogrid, its bonding force with the emulsified asphalt layer and asphalt concrete is low. Under the action of alternating loads, the geogrid and the emulsified asphalt layer It is easy to separate from asphalt concrete, which will also destroy the emulsified asphalt layer. The waterproof performance of the roadbed has not been completely improved, and the roadbed will still sink after being soaked in water. People are looking for a new generation of asphalt concrete pavement materials