Material analysis of glass earthwork grille

发布时间:[2017-11-24 15:59:10] 浏览量:5526次

The fiberglass earthwork grille is a kind of fine geosynthetic material used for road strengthening, old road reinforcing, reinforced roadbed and soft soil foundation. Glass fiber earthwork grate high strength alkali glass fiber is made into a network base through international advanced warp knitting process, semi-rigid products made of surface coating. Has the warp and weft two-way high tensile strength and low elongation, low and high temperature resistant, resistant to cold, anti-aging, corrosion resistance and other excellent properties, are widely used in the asphalt pavement, cement road surface and roadbed of enhancement and railway roadbed, dam slope protection, airport runway, sand project. It is shown that the asphalt pavement is soft and sticky in summer. Under the action of vehicle load, the stressed area produces depression, and the asphalt layer cannot fully recover to the pre-load condition after the vehicle load is removed. The plastic deformation accumulates continuously under the effect of repeated rolling of the vehicle, forming a rut. After we analyze the asphalt road surface structure, can know has rheological property of asphalt concrete, due to high temperatures and under load, the surface can without any constraints in the mechanism of asphalt concrete cimc movement, cause the passage of asphalt road surface, this is the main cause of forming rutting. The glass fiber geogrid is used in the asphalt cover, which plays a skeleton role in the asphalt layer. Between asphalt concrete cimc throughout the grille, form a composite mechanical interlocking system, limit the aggregate exercise, increase the lateral in the asphalt surface binding, restrain each other parts of the asphalt road surface, to prevent the passage of the asphalt layer, which have the effect of resistance to rutting. The application of fiberglass earthwork grille in the asphalt cover has greatly improved the tensile strength of asphalt concrete, which can resist the larger tensile stress without damaging the concrete. In addition, even if the crack occurs in the local area, the stress concentration in the crack is too concentrated, but the transmission of the fiberglass earthwork grille gradually disappears, and the crack will no longer develop into a crack. When choosing fiberglass geogrid, in addition to its performance indicators should conform to the stipulations of the above, also should pay special attention to ensure that the width is not less than 1.5 m, to meet its interlayer as control reflection crack are enough cross-sectional area to fully dissipate the crack energy; At the same time, the mesh size should be 0.5~1.0 times the maximum size of the asphalt surface material, which can help to achieve the best shear adhesiveness, and promote the nesting and restriction of aggregate.
Main use of glass earthwork grille:
1. Old asphalt concrete pavement, reinforced with reinforced asphalt surface layer, to prevent and cure diseases.
2. Cement concrete pavement reconstruction of composite pavement, inhibiting plate shrinkage and other cause reflection cracks.
3. Road extension engineering, the prevention of new and old conjunctures and uneven settlement of the cracks.
4. Soft soil foundation reinforcement treatment, which is beneficial for soft soil water consolidation, effectively inhibits settlement, uniform stress distribution, and enhances the overall strength of subgrade.
5. The semi-rigid base of the new road creates shrinkage cracks, and the reinforcement strengthens the cracks in the pavement caused by the reflection of the foundation crack.

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