PET FiberPET FIBER
The polyester fiber based on high-quality fiber grade polyester chips as the main raw material, while adding a special active agent into the bundle of monofilament synthetic fiber manufactured through a special process. The fiber has high strength, easy to spread, anti-corrosion resistance, high stability, good chemical stability, and asphalt mixture America wrapped in strong, etc., add asphalt concrete, a huge number of single fibers can be formed by mixing the chaotic distribution of play the role of reinforcement and bridging to prevent cracking of the asphalt concrete, in order to effectively improve the mechanical properties of the asphalt mixture.
Fiber additives mainly used in asphalt concrete, asphalt Mary Mastic Crushed Stone (SMA) structure to get more and more applications. SMA mixture that consists of two parts, First, the space frame structure consisting of coarse aggregate, mastic asphalt, slag and fiber. Mastic to fill the voids of the skeleton to form a dense structure of the asphalt mixture. Compared with ordinary asphalt mixture composition, it increases the fiber material, constitute the characteristics of the SMA mixture composition. Polyester fiber in the SMA mixture is not only a stabilizing effect, but also reinforced the role. The mixing of polyester fiber can significantly improve the performance of asphalt concrete. The product is now widely used in high-grade highways, bridges, pavement, airport road and important municipal roads and other fields.
Second Main advantages
1, to improve the high temperature stability, and improve the high temperature stability.
Three-dimensional distribution of monofilament polyester fiber has a strong adsorption and asphalt, and does not wound, you can
Adsorption excess free bitumen, the viscosity of the asphalt and the cohesive force increases, the criss-cross reinforcement and bridging role, reducing the flow properties of the asphalt, and limit the lateral displacement or flow of the aggregate, effective improved high temperature stability, the stability of the fiber asphalt concrete has been greatly improved.
2, to improve low temperature performance
Fiber asphalt adsorption, resulting in optimum asphalt content in asphalt concrete, asphalt content, so that
Fiber asphalt mixture is still in the low temperature of -40 ° C to maintain flexibility and high tensile strength, resistance to shrinkage stress, so that the mixture of low temperature cracking performance enhancements to reduce the temperature shrinkage cracks and to prevent reflective cracking developments.
3, to improve the fatigue performance
Asphalt pavement in the role of the outside temperature environment to withstand the repeated effect of wheel load more than one load repetition
After a specified number of times, the structure generated within the pavement under load stress will exceed the strength decreased resistance, pavement cracks, leading to fatigue fracture failure, mixed with polyester fibers, single fibers in the mixture evenly distribution reinforced the role of the stiffness modulus increase, to improve the fatigue performance of asphalt concrete.
4. Improve the stability of water
The water stability of the asphalt pavement is asphalt pavement to withstand repeated traffic loading and temperature to expand and contract under the existing conditions in the water
Role. Polyester fiber and asphalt film thickness, so that the water replacement asphalt strength decreases, and water infiltration of the reduction of the amount of asphalt concrete, coupled with the adsorption of the fiber asphalt viscosity change, improved asphalt the bonding force of the aggregate, to strengthen the asphalt mixture of asphalt with aggregate formation of the interfacial film resistance to water stripping role in the ability to improve the water stability of the asphalt mixture.
Third application field
A steel structure, bridge laying asphalt soil surface road stone repair and complement the building;
2, to strengthen the airport runway and apron;
3, the new asphalt concrete pavement surface or middle;
4, the old asphalt concrete pavement surface;
Fourth the amount of fiber mixing
One for the highway, a highway, urban trunk: modified asphalt mixed with 2 ‰ to 3 ‰, which is a ton
Asphalt mixture mixing 2 ~ 3kg; ordinary asphalt mixing 3 ‰, which is a ton mixture by adding 3kg;
2, for bridge deck asphalt pavement: modified asphalt mixed with 3 ‰;
3, the open graded friction course (drainage asphalt pavement): 0GFC adding 0.15 ‰ to 3 ‰;
4, slurry seal, micro surfacing, thin asphalt pavement: adding 2 ‰ to 3 ‰;
5, the general asphalt road: AK / AC / LH / SAC: adding 2 ‰ to 3 ‰.
Fifth usage
1、To determine each plate heat silo mixing ratio, to calculate the quality of the mixture per plate, depending on the target with the calculation of the mixture per plate to be put in fiber quality than the determined amount of fiber. Then press the quality requirements from the production factory to do the appropriate product packaging to ensure accurate calculation.
2、Asphalt mixture according to the design asphalt content for the trial mix and trial mix samples from the Marshall test, and experimental values and interior with the test results, verify the rationality of the design asphalt content, if necessary, make appropriate adjustments;
3、Determine the optimum mixing time. ordinary asphalt mixture, the intermittent mixing equipment each plate mixing time for 30-60s, after the addition of fiber will lead to mixing time to extend the 10-15s, mixing time recommended for the dry mix of 25-30s, wet mix 30s, a mixed the mixing uniformity, good fiber and asphalt mixture is wrapped cover subject
4、To determine the appropriate mixing and factory temperature. Asphalt (refer to the heating temperature of the asphalt, the same below) should be 130 ℃ -160 ℃, heating is not more than six hours, and the day of heating should be run out of the day, should not be repeated heating to avoid aging. The factory temperature of the asphalt mixture should be 130 ℃ -160 ℃, 10 ℃ -15 ℃, when the use of modified asphalt should be higher than the upper limit of the above-mentioned temperature, the mixing of fibers do not have to adjust the temperature.
Sixth compaction Note
The compaction procedure is divided into the initial pressure, the complex pressure and final pressure of the three processes. The initial pressure of the purpose of leveling and stable mixture, at the same time create favorable conditions for the resumption of pressure is the basis of the binder, so pay attention to the compacted formation; the purpose of re-pressed so that the mixture is dense, stable, forming the mixture the density depends on this process and therefore must be closely co-ordinated with the initial pressure, and generally use the heavy roller; the final pressure is designed to eliminate wheel tracks, and finally the formation of smooth compacted surface, so this process should not be used to heavy rollers in high-temperature to complete, otherwise it will affect the flatness. 6-18 ton wheeled roller 6-10 ton vibratory roller (off vibration device) pressure twice the initial pressure, initial pressure, check the flatness of road humps to be trimmed, if necessary. In the rolling goes on, you should wait until the temperature is slightly lower after pressure; such as cracks, reasons should be examined to take timely measures to correct. Complex pressure with 10-12 tons of three roller 10 tons vibratory roller or tire pressure Road, RCC should be 4-6 times to stable and no obvious tracks. The final pressure of 6-8 ton vibratory roller (turn off the vibration device) pressure 2-4 times to remove the wheel track. Plus fiber asphalt mixture viscosity increases, should be increased by 1-2 times on the basis of the above ordinary asphalt mixture rolled several times, or to improve the paving and rolling temperature roller to keep up with the paver to avoid temperature drop too much, in order to achieve the desired compaction effect.
Seventh、Specfication and Package
Specfication ：PES-RY6
Package：1.0kg/plastic bag，20kg/plastic bag。
