PAN Fiber

Polyacrylonitrile fiber based on polyacrylonitrile resin as raw material, made by a special process. With the traffic volume,
Especially the increase in heavy vehicles, traffic, pavement quality requirements have become more stringent, to improve road durability is an important method is to join the stability of additives in the asphalt mixture, polyacrylonitrile fiber is not only additive, but can improve the colloidal structure of asphalt, for the asphalt mixture, can play the role of reinforced adsorption asphalt, etc., high temperature stability, and improve the bond strength.

With the development of the project, polyacrylonitrile fiber applications is becoming increasingly widespread. Cement concrete as a stiffener material, which can effectively suppress the plastic cracks and shrinkage cracks in concrete early to improve the toughness and impact resistance of concrete to improve the concrete frost resistance, impermeability, durability of the road. be more widely used in the construction of bridges, tunnels, water conservancy, port, industrial and civil construction projects.

Second, the main function
Used in asphalt concrete

1. Sorption of a polyacrylonitrile fiber
Fiber diameter is relatively small, large surface area per gram of fiber surface area up to several square as much as fiber
Dimensional dispersion in the asphalt, asphalt and fiber will be generated between the physical and chemical effects, the asphalt layer of a single molecular arrangement in the fiber surface, to form a binding rugged construction asphalt interface layer. At the same time, the fiber and the surrounding structures asphalt wrapped to cover the surface of the aggregate, the aggregate surface of the asphalt membrane increases, to slow down the speed of asphalt aging and extend the useful life of the pavement by the use of

2, polyacrylonitrile fiber reinforced role
Three-dimensional random distribution of fibers in Mastic, these fibers play a role in blocking the cracking of the mixture, thus
Asphalt pavement crack self-healing capabilities, and reduce the appearance of cracks. But is not all of the fiber can play this role due to the low tensile strength of wood fibers and mineral fibers, it is basically not have reinforced the role of polyacrylonitrile fibers have a higher strength, the reinforcement effect is more obvious.

Used in cement concrete
1, to improve the crack resistance of concrete
Early concrete shrinkage cracks, shrinkage cracks, settlement cracks, thermal stress cracks
Have a significant effect. The early cracks in the plastic concrete is mainly due to segregation of secretion of water or slurry, the settlement of coarse aggregate, thermal stress, this result, the stress is greater than the strength of concrete will crack, polyacrylonitrile fiber added to improve the ability of concrete to resist the stress of early, thereby preventing the cracks.

2, to improve the impermeability of concrete
By a large number of polyacrylonitrile fiber in the concrete within the three-dimensional chaotic distribution, improve the density of concrete
Resistance and reduce through capillary pore formation.
3, to improve the impact resistance and toughness of concrete
Concrete is a brittle material, brittle fracture can easily be affected so that, the polyacrylonitrile fiber
Entry can absorb the energy of the applied stress, and improve the overall concrete impact energy absorption capacity. First, the tensile deformation of the fiber when the concrete by pressure or tensile failure, due to the absorption of stress, such as fiber fractured concrete began to damage, thereby increasing the toughness of concrete.

Third, the application areas
1 Road: asphalt concrete pavement, cement concrete pavement, municipal roads, etc.;
Underground engineering: civil air defense projects of national defense works, military facilities, tunnels and subway;
3, hydraulic engineering: the harbor pier, dams, spillways, water channels and other engineering facilities;
, Concrete components: panels, poles, trailer coupling, concrete covers, etc.;
5, construction: basement, transfer beam, floor, etc.;
6, ancillary facilities: highway crash safety retaining wall, the impact of the baffle, machinery and equipment base, etc.;

Fourth, the amount of fiber mixing
1, used in asphalt concrete: mixing 2 ‰ to 3 ‰, which is a ton of asphalt mixture mixing 2 ~ 3kg, usually the standard dosage is 2 per thousand, per ton of asphalt mixture mixing 2.25kg;
2, used in cement concrete: cement per cubic concrete mixing 0.6 ~ 1.2kg, the usual standard dosage of 0.9 or 1.0kg;

Fifth, instructions for use
Used in asphalt concrete
A general per ton of asphalt mixture mixing 2kg, calculated according to the volume size of the thermal silo, each plate material mixed with the fiber weight
Amount;
2, adding polyacrylonitrile fiber asphalt mixture when the fiber is not mixed with the same;
3, in accordance with the provisions of mixing amount can be each pouch fiber directly dropped into the mixing equipment, without opening the packaging;
4, with the mixture of dry mix to extend the 15 ~ 30s, and then adding the asphalt wet mix concrete fibers uniformly dispersed on the main principles.

Used in cement concrete
1, generally per cubic meter of concrete polyacrylonitrile fiber content range of 0.6 ~ 1.2kg / m³.
2, in accordance with the changes of the amount of stone, sand, cement and the crack of the project requirements can be adjusted appropriately polyacrylonitrile fiber content up to 1.6kg / m³.
3, the original concrete mix without change, we recommend the adoption of compulsory mixing equipment. Fibers and other materials (sand, stone, cement, etc.) with the input feed port, and then stir in accordance with conventional methods of production can be stirring may be appropriate to extend the mixing time of 30 ~ 60s, in order to ensure a uniformly dispersed.
4, the initial use, to be the mixer after mixing is complete random sampling, such as the fiber is uniformly dispersed, directly ready for use, if there are bundles of fibers are slightly extend the mixing time
5, construction and maintenance should continue to strictly implement relevant building codes.

Six, specifications and packaging
Specifications: PAN-RY6/12;

Packaging: 0.9kg / bag or 1.0kg / bags, 18 or 20kg plastic woven bags.