Ultra-high performance concrete mixes cost $360-650 per cubic yard and have compressive strength from 22,500 PSI to 29000 PSI. There are proprietary makers of stronger concrete with costs of $2000 per ...

First concrete mix to deliver one-hour working time, three-hour walk-on time and 6,500 psi compressive strength with crack, freeze-thaw and corrosion resistance Quikrete Introduces Q-Max Pro Concrete, ...

Concrete suppliers and contractors are sometimes accused of producing or placing low-strength concrete. While low-strength concrete does occasionally occur, many times reported cylinder strengths are ...

Stress is defined as the force per unit area. Thus, the formula for calculating stress is: Where σ denotes stress, F is load and A is the cross sectional area. The most commonly used units for stress ...