4K Psi Concrete Compressive Strength at 3-7-21 & 28 days According to ACI code standard, concrete grade is categorized according to their compressive strength represented as concrete mix 2k Psi, 3k Psi, 4k Psi, 5k Psi, 6k Psi, 8k Psi and 10k Psi. For example, in concrete mix 2000, numerical …
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