1.Add polypropylene staple fiber concrete mix design should be consistent with jgj55-2000 "Ordinary concrete mix design rules" provisions

2.polypropylene staple fiber concrete mix design, in addition to meet the structural design requirements of the compressive strength and flexural strength, and fiber dispersion, construction requirements and workability, under certain conditions should also meet the crack resistance , Fatigue resistance, impermeability, frost resistance, erosion resistance or corrosion resistance and other requirements.

3.reference jgj55-2000 "Ordinary concrete mix design rules" requirement. Polypropylene staple fiber concrete mix design should be used test - calculation method, and according to the following steps;

a) According to the strength of the standard value or design value and the construction of the preparation of the strength of the coefficient to determine the test with the compressive strength and tensile strength or test compressive strength and flexural strength.

b) Calculate the water-cement ratio based on the test compressive strength

c) According to the test compressive strength and flexural strength, or through the available data to determine the amount of polypropylene staple fiber added

d) According to the consistency of the construction requirements, the volume of water used per unit volume should be determined through experiments or existing data. For example, the influence of admixture should be considered when adding admixture.

e) determine the reasonable sand rate through the test or relevant data.

f) According to the absolute volume method or the assumed mass density method to determine the amount of material to determine the test mix ratio.

g) According to the test mix test performance of the mixture, adjust the unit volume of water and sand to determine the intensity of the test with the benchmark mix.

h) According to the strength test results adjust the water-cement ratio and the amount of polypropylene staple fiber to determine the construction mix.

Hai'an Qinfeng Fiber Co., Ltd. mainly produces PP staple fiber and polyester staple fiber: specifications 1.5D to 200D, length 5-150mm, product color sky blue, red, yellow, black, etc., can be kind to build. Polypropylene staple fiber and polyester staple fiber variety, support color to map or sample custom, fully meet your individual needs, with an annual output of 20,000 tons,