Technical properties of polypropylene fiber reinforced concrete: Polypropylene fiber bundle is designed for the development and production of new concrete composite material. Summarize its application practice, polypropylene fiber reinforced concrete has the following main characteristics.

1 to reduce the fracture, reduce the permeability of concrete

Test showed no fiber material mixed with concrete slabs, 2.5h began to have micro-cracks, and doped fiber concrete slab in 25h, even after no cracks 28d. Addition of polypropylene fiber concrete to reduce its rate of bleeding and bleeding of the total, an increase of elongation of plastic concrete, thereby greatly reducing the plastic settlement cracks.

When the permeability of plain concrete and adding different amounts of fiber reinforced concrete specimens were compared by the amount of penetration showed that adding an amount of 0.953kg / m, permeability reduction from 33% to 44%, while the amount of mixing 1.186 kg / m, the permeability reduction of 79%.

2 enhanced abrasion resistance

Determination of rotational cutting test method according to fiber reinforced concrete abrasion resistance 105%. After the increase in the use of fiber roughness will allow the exposed surface of the concrete under the same test conditions abrasion, wear resistance increased by 1 times.

3 increase resistance to breakage capacity

Determination of fiber reinforced concrete and plain concrete chipping capacity with compression tester. Specimen size 525mm × 150mm × 150mm, the aspect ratio is 3.5: 1, in order to simulate high-rise building pillars, loading speed .0635mm / min. The results showed that fiber concrete specimens compressive deformation than plain concrete specimens is 10%, and does not collapse broken, and plain concrete specimens in the first cracks appeared after the collapse soon broken. This feature fiber reinforced concrete study shock loads on structural damage is very important. When splitting concrete, fiber revealed, the entire fiber length and grout have good adhesion. It explains the strong resistance of concrete fiber breakage capacity.

4 increased impact resistance

Fiber reinforced concrete impact test results show that for steel beams and there is no reinforcement beams, the addition of the fiber bundle of concrete significantly increased its energy absorption. It can prevent the further development of cracks, and when subjected to stress, strengthen links around the reinforced concrete and steel.