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the concept and characteristics of fiberglass-polyester paving Mat

Views: 0     Author: Site Editor     Publish Time: 2023-11-28      Origin: Site

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Tunnel construction case

I. What is fiberglass-polyester paving Mat?

fiberglass-polyester paving Mat is a new fiberglass composite anti-cracking material. It is a composite geosynthetic material composed of 60% glass fiber and 40% polyester fiber. This unique combination gives it the strength of fiberglass and the flexibility of polyester. Fiberglass-Polyester Paving Mat is a new type of composite geosynthetic material developed after geotextiles, geogrids, and strip polymers. It has good compatibility with asphalt mixtures. Engineering practice shows that fiberglass grating has no waterproof function, and its grid can form an embedding effect with the asphalt mixture. However, it is difficult to fix during use, and it is easy to expand and not conform, which affects the normal paving and reinforcing effect of the asphalt mixture. ; Geotextile can prevent water seepage, but when the hot asphalt mixture paving temperature exceeds 160°C, the strength and creep resistance of geotextile are poor and it cannot exert the reinforcement and anti-cracking effect; while fiberglass-polyester paving Mat overcomes the eliminate the shortcomings of both. It effectively treats pavement cracks and water damage to bridge decks and road surfaces.

II. Characteristics and advantages

a.Delay reflective cracks

Pavements that do not use fiberglass-polyester paving Mat will develop reflective cracks within a few months. fiberglass-polyester paving Mat has a very low elongation and instantaneous tensile strength, which can effectively eliminate the stress concentration at road joints or cracks. Reducing the expansion and upward reflection of cracks in the pavement can delay the occurrence of reflective cracks and extend the service life of the road, thus greatly reducing the cost of repair and maintenance.

b. Provide super waterproof layer

Installing a waterproofing layer under hot mix asphalt pavement is one of the best ways to protect and extend the life of your road. Anti-cracking cloth made of general materials will deform and be damaged at high temperatures. fiberglass-polyester paving Mat is made of non-woven fiberglass polyester. Can withstand high temperature construction of modified asphalt concrete. The high-temperature stability of fiberglass-polyester paving Mat will provide a continuous, non-deformable waterproof layer for the road surface, effectively preventing moisture penetration and avoiding damage to the pavement layer and base layer caused by moisture penetration.

c. Can be completely crushed and used for road regeneration

The material properties of fiberglass-polyester paving Mat determine that it can be crushed and recycled. When milled, fiberglass-polyester paving Mat is broken down into very small fibers. This can actually improve the performance of the regrind. Anti-rip cloth from other materials can sometimes stick to the milling machine, causing costly downtime.

d. No shrinkage

fiberglass-polyester paving Mat remains unchanged in high-temperature construction environments and does not shrink.

e. No stretching

fiberglass-polyester paving Mat will not stretch or deform during construction and installation.

f. High temperature resistance

fiberglass-polyester paving Mat can withstand temperatures up to 258 degrees Celsius, so it will not melt or become brittle when paving asphalt concrete.

III. Performance comparison between high-performance fiberglass-polyester paving Mat and domestic fiberglass-polyester paving Mat

fiberglass-polyester paving Mat is a patented product of Owens Corning Company of the United States. Since entering China in 2001, after research by relevant domestic and foreign research institutions, it has been widely used in engineering and has achieved good engineering results. At present, in highway construction, it is mainly used in the crack treatment of water-stabilized base layers and the rigid and flexible joints of bridge decks and road surfaces. Its successful application on dozens of highways such as Mengbeng and Shanghai-Nanjing is a good example. . Shaanxi Meitetuoda Environmental Protection Technology Co., Ltd., together with Shaanxi University of Science and Technology, Nanjing Papermaking Research Institute, and Nanjing Glass Fiber Research Institute, after five years of R&D experiments, introduced advanced foreign technology and independently designed and developed the only wet felt production line in China ( 17g·1000g), to better meet market needs and product performance requirements.

Now, several key indicators of domestic fiberglass-polyester paving Mat and Metek fiberglass-polyester paving Mat are compared as follows:

a. Amount of oil absorption: fiberglass-polyester paving Mat absorbs a certain amount of asphalt to form a waterproof and reinforced layer. Therefore, the amount of asphalt absorbed directly affects its waterproofing and reinforcing effects. Test results under the same conditions (asphalt temperature 160°C, soaked for 5 seconds), the imitation product is about 75% of the imported material.

b. Shear test results: Oblique shear test at 50℃: TP 0.41MPa; domestic 0.03MPa. This is mainly because when the temperature is high, the asphalt used for the adhesive layer seeps up and breaks away from the fiberglass-polyester paving Mat to form free asphalt, which further leads to a significant reduction in shear resistance. During construction, hot asphalt mixture (up to 170°C) is used to heat the adhesive layer to fuse it with the fiberglass-polyester paving Mat. Therefore, it is inevitable for the fiberglass-polyester paving Mat to withstand high temperatures, which seriously affects the fiberglass-polyester paving Mat. The waterproof and crack-resistant properties of the cloth. Judging from the shear test results, there is a big gap in the shear resistance of domestic fiberglass-polyester paving Mat.

c. Pulling test results: The pulling test result of TP material at normal temperature is 0.39MPa; the domestic product is 0.21MPa.

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