Determining fiber dosage for screed reinforcement
I have been preparing a mix for an industrial floor screed and wanted to clarify standard dosages. Are there stable rules for polymer fibers, or does every project require individual testing?
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I usually evaluate fiber additive dosage based on concrete thickness and expected mechanical loads. For standard floor screeds, synthetic monofilament around 0.6 to 0.9 kg per cubic meter generally prevents surface microcracks. Heavy structural elements or shotcrete require coarser macrofibers, often reaching 2 to 6 kg per cubic meter. Anyone planning proportions can check technical details at https://mixfiber.com/articles/how-to-calculate-the-required-amount-of-fiber-for-concrete before preparing materials. Going over 2 kg for light microfibers rarely brings real structural gains, while adding macrofibers requires slightly longer mixing times to distribute the synthetic strands properly throughout the entire batch.