They sold us a lemon. The car broke 4 months after we bought it. Had to replace the transfer case ($4,000). The roof leaked when it rained ($500). Not to mention when we first got the car, all the...
When performing temperature tests, it is important to. use a good, accurate thermometer that is surrounded. by at least three inches of concrete. Take readings. quickly, noting that small samples lose heat fast. Concrete temperatures are affected by the mix-water. temperature, aggregate temperatures, cement type. and admixture type. Optimum concrete temperatures. will aid with setting, early strength development, proper curing and ultimately aid in achieving a higher. quality concrete. Hot concrete sets up rapidly, gaining.
Effect of Concrete Strength and Slab Thickness on Floor Strength. Q.: The specification for the floor of a maintenance building called for a 6-inch slab thickness and concrete with a design compressive strength of 3000 psi. The actual average cylinder strength for the floor concrete was 3630 psi. Four months after the floor was placed, 10 cores were drilled, measured, and tested in compression. The average core length was 5.62 inches, and the average strength was 5580 psi.