1. Construction Method of Glass Fiber Grid

The use effect of fiberglass grille is closely related to the treatment of pavement. Before paving, it is necessary to thoroughly remove the materials such as grease, paint, sealing material, water stain and dirt which may affect the bonding strength between the grille and the underlying layer, so as to make the paving surface clean and dry. The pressure-sensitive back of glass fiber grille belongs to water-soluble substance. If there is water mark on the road surface, it should be laid after the road surface is dry. Before laying the grille, sticky oil should be sprayed. If using emulsified asphalt, the grille should be laid after full demulsification and drying.

2. Laying and Fixing of Glass Fiber Grid

The grille can be laid by special equipment modified by tractors or automobiles, or manually. The two ends of each roll of glass fiber grille product are marked with orange and blue markings. Before laying, the glue should be chosen to face down to determine the marking color at one end so as to facilitate construction without mislaying the glue surface. When the grille is laid, it should be kept flat and tightened without wrinkling, so that the grille has effective tension. After the grille is laid, it should be rolled again with a clean steel wheel roller.

At present, there are two kinds of glass fiber grids, self-adhesive and non-self-adhesive. Self-adhesive can be laid directly on the flat base, and steel nail fixation is usually used without self-adhesive.

When fixing steel nail method is used to lay glass fiber grid, one end of fixing iron sheet and steel nail is fixed on the underlying structure which has been sprayed with sticky asphalt. Steel nails can be injected by hammering or shooting nails. Then the grille is tensioned longitudinally and fixed in segments, each of which is 2-5 m in length. It can also be segmented according to the distance between shrinkage joints. The position of steel nails is located at the joint. The longitudinal and transverse tensions of glass fibers are required when the grids are tensioned.

The overlap of grille is longitudinal, the width of overlap is not less than 20 cm, and the width of transverse overlap is not less than 15 cm. The former should be placed above the latter according to the direction of asphalt paving. When fixing, the steel nail can not be nailed on the fiberglass, and the fiberglass can not be directly knocked with a hammer. If the nail is broken or the iron sheet is loose after fixing, it needs to be re-fixed. After the glass fiber grille is laid and fixed, the roller roller must be used to roll the grille moderately and stably so as to make the grille firmly adhere to the original road surface.

In actual construction, some construction units directly spread glass fiber grille after spraying viscous oil. Roller compaction followed by rolling, the effect is better, and glass fiber grille is not easy to wave.

In the actual operation process, the quality of construction has a great impact on the use of glass fiber grids in the future. Therefore, it is particularly important to strengthen quality supervision and improve the technical level of construction personnel.

3 matters needing attention in construction

(1) Strictly control the entry and exit of vehicles transporting mixtures, and prohibit the steering, braking and dumping of mixtures on the grille layer, in order to prevent damage to the glass fiber grille.

(2) The backing glue of glass fiber grille is easy to dissolve in water, and can not be constructed in rainy days or when the road surface is wet.

(3) Fiberglass grille is made of fiberglass, which can easily irritate human skin. Construction personnel should wear protective gloves.

(4) When the rubber wheel roller needs to be watered to increase its weight, its water injection rate should not be too full to prevent overflow to the glass fiber grille, resulting in the loss of viscous back and abdomen.

(5) In the course of laying glass fiber grille, if it is found that there are smaller pits on the original road surface that have not been filled in first, the corresponding part of the pit can be cut off in the paved grille so that the pit can be completely filled in the course of laying asphalt mixture.

(6) Pavement temperature should be between 5 C and 60 C when the grille is laid.