The main components of glass fiber geogrid fiberglass for road construction are: silicon oxide, an inorganic material, its physical and chemical properties are extremely stable, and have high strength, high modulus, high wear resistance and excellent cold resistance, no long-term creep; thermal stability Good; the net structure enables the aggregate to be locked and restricted; it improves the load-bearing capacity of the asphalt mixture. Because the surface is coated with special modified asphalt, it has dual composite properties, both the excellentness of glass fiber and the compatibility with asphalt mixture, which greatly improves the wear resistance and shear resistance of the geogrid Cut ability.
Construction technology of Road pavement fiberglass geogrid
(1) First accurately release the subgrade slope line. In order to ensure the width of the subgrade, each side is widened by 0.5m, and the dried base soil is leveled and then statically pressed twice with a 25T vibratory roller, and then pressed four times by a 50T vibration , Manual leveling of uneven places.
(2) Pave the medium (coarse) sand with a thickness of 0.3m, and after manual and mechanical leveling, the 25T vibratory roller is statically pressed twice.
(3) The geogrid should be laid. The bottom surface of the geogrid should be flat and dense when laying. Generally, it should be laid flat, straightened, not overlapped, curled or kinked, and two adjacent geogrids should overlap by 0.2m, and The overlapped part of the geogrid shall be interspersed and connected with No. 8 iron wire every 1 meter along the transverse direction of the roadbed, and the laid grid shall be fixed to the ground with U-shaped nails every 1.5-2m.
(4) After the first layer of geogrid is laid, start to fill in the second layer of 0.2m thick medium (coarse) sand. Method: transport the sand to the construction site and unload it on the side of the roadbed, and then use a bulldozer to push forward. After filling 0.1m within 2 meters on both sides of the roadbed, the first layer of geogrid is folded up and then filled with 0.1m of medium (coarse) sand. Filling and pushing in the middle on both sides is prohibited, and all kinds of The machine is working on the geogrid without medium (coarse) sand, so as to ensure that the geogrid is flat, without drums or wrinkles. After the second layer of medium (coarse) sand is leveled, horizontal measurement is required To prevent uneven filling thickness, use 25T vibratory roller to static pressure twice after smoothing.
(5) The construction method of the second layer of geogrid is the same as that of the first layer. Finally, 0.3m of medium (coarse) sand is filled. The filling method is the same as that of the first layer. After two times of static pressure with a 25T roller, this The reinforcement of the roadbed base is completed.
(6) After the (coarse) sand in the third layer is rolled, two geogrids are laid on each side of the slope along the longitudinal direction of the line, overlapped by 0.16m, and connected by the same method, and then start the earthwork. When laying a geogrid for slope protection, the laying edge must be measured for each layer, and the geogrid must be buried 0.10m inside the slope after the slope is repaired.
(7) For every two layers of soil filled with geogrid on the side slope, that is, when the thickness is 0.8m, a layer of geogrid must be laid on both sides at the same time, and then so on, until it is laid under the soil on the road shoulder.
(8) After the roadbed is filled, timely repair of the side slope and dry rubble protection at the toe of the slope. Except for the widening of each side by 0.3m, 1.5% of the settlement amount is reserved.
Characteristic of Geocomposite fiberglass geogrid geotextile fiberglass geogrid.
(1) High tensile strength and low elongation--Glass fiber geogrid is made of glass fiber, which has high resistance to deformation, and the elongation at break is less than 3%.
(2) No long-term creep--As a reinforcing material, it is extremely important to have the ability to resist deformation under long-term load, that is, creep resistance. The glass fiber will not creep, which ensures that the product can maintain long-term performance.
(3) Thermal stability-the melting temperature of glass fiber is above 1000°C, which ensures the thermal stability of the glass fiber geogrid during paving operations.
(4) Compatibility with asphalt mixing--The material coated in the post-treatment process of the glass fiber geogrid is designed for asphalt mixture, and each fiber is fully coated, which has a high correlation with asphalt. Capacitive, thus ensuring that the glass fiber geogrid is not isolated from the asphalt mixture in the asphalt layer, but is firmly combined.
(5) Physical and chemical stability-After coating with a special post-treatment agent, the glass fiber geogrid can resist all kinds of physical abrasion and chemical erosion, and also resist biological erosion and climate change, ensuring its performance is not affected.
(6) Aggregate interlocking and restriction--Because the glass fiber geogrid is a mesh structure, the aggregate in the asphalt concrete can penetrate through it, thus forming a mechanical interlocking. This restriction hinders the movement of the aggregate, so that the asphalt mixture can achieve a better compaction state, higher load-bearing capacity, better load transfer performance and smaller deformation under load.
