Glass fiber grid is a kind of geosynthetic material used to strengthen pavement, old road, subgrade and soft soil foundation. At disposal asphalt Reflective cracking of pavement has become an irreplaceable material in application. The product is therefore alkali free Glass The fiber is made into mesh through the warp knitting technology of the domestic predecessors A semi-rigid finished product made from the surface coated substrate. With warp and weft directions very good Of stretching Strength and low elongation are widely used in asphalt pavement cement Strengthening of pavement and subgrade and protection of subgrade and embankment Slope, airport runway, sand control and other engineering projects.
Laying glass fiber Geogrid What are the methods?
a. Selection of viscous layer oil AH-70 or AH-90 The specification and quality of heavy oil hot asphalt and tack coat oil shall comply with the Technical Specification for Construction of Highway Asphalt Pavement JTJ032-94 , using *** Vehicle spray. The amount of tack coat oil per square meter is about 0.4kg-0.g 。
b. When laying the glass fiber geogrid, it should be kept smooth and tight, and the transverse overlapping length should be 50-100mm The longitudinal lap length should be 150-200mm And press the rear end under the front end according to the paving direction.
c. Use rubber tyred roller to roll.
d. 3mm The fixed iron sheet shall be flat without warping angle, and the surrounding shall be chamfered, two Inch steel nail ( Cement nail )
e When laying glass fiber geogrid with nail fixing method, first fix one end on the substructure that has been sprayed with tack coat asphalt with fixing iron sheet and nails, and the nails can be hammered or shot * Shoot in. When the grid is tensioned longitudinally, the glass fiber is in a straight and tensioned state transversely.
f. When the nails are fixed, the grid overlapping distance is: longitudinal Connector The overlapping distance is not less than 15cm , the transverse overlapping distance is not less than 5cm 。 The longitudinal overlapping shall place the former one above the latter one according to the asphalt paving direction.
g. When fixing, the nail shall not be nailed on the glass fiber, nor shall the glass fiber be directly knocked with a hammer. If the nail is broken or the iron sheet is loose after fixation, it needs to be re fixed.
h. To prevent the tires of construction vehicles from sticking the fiberglass grille and viscous oil. In case of wheel slipping with asphalt concrete paver, stone chips shall be scattered on the surface of tack coat oil. The amount of stone chips is 3m3/1000m2-5m3/1000m2 。
i. Atmospheric temperature below ten No construction is allowed when the temperature is Celsius or the road surface is wet.
j. The construction method of asphalt surface course is the same as that of ordinary asphalt pavement surface course, but it should be noted that construction vehicles should not make sharp turns or brake on the surface of glass fiber grid. ⑵ Direct laying method of self-adhesive glass fiber geogrid
