8. A concrete pavement is tested for indirect tensile strength for 4 samples of 375 psi, 400 psi, 425 psi and 750 psi at
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8. A concrete pavement is tested for indirect tensile strength for 4 samples of 375 psi, 400 psi, 425 psi and 750 psi at
8. A concrete pavement is tested for indirect tensile strength for 4 samples of 375 psi, 400 psi, 425 psi and 750 psi at 7 days. What is the average compressive strength at 28 days if we assume 28 days compressive strength is 50% more than 7 days strength? (3 points)
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