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Moving to another question will save this response. Question 4 Concrete strengths of up to 20,000 psi are available because of a. stronger stone O b, accelerating agents c. super plastisizers d. cheeriosilators Moving to another question will save this response. MacBook A

Solution

A) Stronger stone

For 1/2\" cylinders, the cement paste broke at 2000+ psi, gravel at 2000 psi, and vermiculite at 400 psi. The beams\' maximum load will vary depending on the form used.Concerete strength availIn addtion to high quality aggregates other key factors in producing high strength concrete include a low water ratio,high ulaity cement ,addtitives such as silica fume and super plasticizers ti improve workability