The fiberglass grid can prevent diseases such as cracks in highway pavement. If the fiberglass grid is not used, when the asphalt pavement appears to have flaking, loosening, segregation, asphalt aging and other diseases, these diseases will develop into potholes if not treated in time. Pavement damage such as pits, cracks, and chipping.
This is because the aging of asphalt with the opening of the road and the increase of road age, the asphalt will gradually age. Asphalt aging is a very complicated process. There are harmful media and the mechanical pressure of the vehicle. A variety of physical and chemical reactions occur simultaneously. For example: oxidation, exudation hardening, physical hardening, loss of volatiles, these factors lead to changes in asphalt performance: lower level, becoming inelastic, higher agglomeration and brittleness, resistance to temperature cracks of the asphalt layer, The anti-fatigue damage, anti-looseness and water-resistant damage capabilities will gradually weaken, the damage phenomenon of the asphalt surface layer will gradually increase, and the structure of the road surface will form pits, looseness, cracking, flaking, chipping and other phenomena.
Horizontal cracks are a kind of cracks that occur in the asphalt surface layer. There are many external causes of horizontal cracks, but most of them are temperature cracks-that is, cracks caused by temperature changes, such as sudden temperature drop in winter and large temperature drop. Low-temperature shrinkage cracks occur on the asphalt surface. Micro-cracks on the asphalt pavement are not treated in time, and water will quickly penetrate the micro-cracks into the pavement layer, causing damage to the asphalt pavement and also causing hidden dangers to the roadbed. In a sense, asphalt The maintenance of the pavement is to solve the problems of water seepage, waterproofing and blocking seams, so it is imperative to use glass fiber grids.
If the roadbed is unstable before the construction of the fiberglass grid, which causes the pavement network to crack, the roadbed can be treated with lime or cement, or reinforced with grouting, and the depth can be determined according to the specific situation, generally 20-40cm. The amount of slaked lime is 5% -10 %, Or the amount of cement 4% -6%. After the soil roadbed treatment is stable, redo the base layer and the surface layer K302 + 200-360 section of the left and right pavements. This treatment is needed. The pavement network is caused by the weak or insufficient thickness of the base layer. When cracking, according to the situation, it can be strengthened by taking thickening, swapping or comprehensive stabilization measures.