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what is the crushing strength of m concrete at seven days Sao Tomeand Principe

what is the crushing strength of m concrete at seven days Sao Tomeand Principe

Compressive strength at 28 days ≥ 45 MPa Flexural strength at 28 days ≥ 4 MPa Air Content ≤ 3 Adhesive Bond Strength to Concrete ≥ 2 MPa Capillary Absorption ≤ 05 kgm2h05 The sand to be used in the mortar shall be graded quartz sand and the sand content shall be in accordance with the desired consistency

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