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Why ? how? Added polypropylene macrofibers Synthetic macro-polypropylene fibers:The most commonly used crude fiber is polypropylene, which conforms toASTM C 1116 standard, its diameter varies from 0.2 to 0.8 mm. fiberIn the hardened state (before) they perform the function of preventing cracking24 hours without greater effect), reduce the width of the crack if it becomesPresents …

The reason why fiber is used in concrete is the same as the principle of straw for mud brick, which is to prevent cracking, because the brittleness of concrete is strong, the greater the strength, the greater the brittleness, under the condition of receiving external force and easy to break, after adding the synthetic fiber …