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Theory And Practice Of Glass Fiber Geogrid On Anti-Reflection Cracks In Roads

Jiangsu Hanovo New Material Co.,Ltd | Updated: Nov 19, 2018

The glass fiber geogrid is made of glass fiber alkali-free and roving-free roving as the main raw material. The mesh structure material made by a certain weaving process has stable physical and chemical properties, high strength, high modulus, wear resistance, cold resistance and no long-term creep. Change, good thermal stability. The aggregate structure is locked and restricted by the mesh structure, which improves the bearing capacity of the asphalt mixture. Because the surface is coated with special modified asphalt, it has two-fold composite performance, which has the superiority of glass fiber and the compatibility with asphalt mixture, which greatly improves the wear resistance and shear resistance of geogrid. Cutting ability.

The reflective crack of the road is caused by the large displacement of the old concrete surface layer near the joint or crack, causing stress concentration in the asphalt overlay above it. It includes horizontal displacement due to temperature and humidity changes, and Vertical shear displacement caused by traffic load. The former results in a concentrated tensile stress in the asphalt overlay above the seam or crack; the latter causes the asphalt overlay above the seam to experience greater bending and shear stresses. Due to the large modulus of the geogrid, it reaches 67Gpa. As a rigid hard layer, it is applied in the asphalt layer. Its function is to restrain the stress and release the strain. At the same time, it can be used as an asphalt concrete reinforcement material to improve the resistance of the overlay structure. Pulling and shearing ability to achieve the purpose of reducing cracks. Practice has shown that the corresponding crack energy of a horizontal crack with a changed direction can be moved 0.6 m from its starting point, and the reinforced material with a width of 1.5 m or more helps to ensure that the energy is completely dissipated on both sides of the crack.

The road-specific glass fiber geogrid is a new type of excellent substrate for reinforcing road pavement. The product is coated with fiber filaments on both sides, and has high longitudinal and transverse tensile strength, low elongation and high temperature resistance. After surface treatment, it has high alkali resistance and can be applied to the construction of asphalt concrete pavement and cement concrete pavement. Compared with the traditional structure of the road surface, it can reduce the construction cost and maintenance cost of the project and extend the service life of the road. Effectively prevent road quality cracks, cracks, cracks and other quality problems. It has been used in foreign countries, especially in Europe, America and Japan for decades. This new composite material is not only of high quality and low price, but also has the most outstanding advantage of reducing road maintenance costs.

The fiberglass geogrid has the characteristics of simple technology, cost saving, convenient construction and long service life, and has wide application prospects, especially the transformation of the old cement road, which can effectively prevent and delay the generation of reflective cracks. Quickly absorb and spread the stress caused by gravity, reduce the construction cost, extend the service life, and reduce maintenance costs.