I - Answer the following by True or False or fill in the answer.
Most shrinkage occurs across the grain of wood.
To produce a workable nonsuperplasticized concrete you need at least 100 lbs. of water per cu. The tensile strength of concrete is determined on the split cylinder test. Concrete cured in sub-freezing temperature will never gain adequate strength within 28 days. A concrete slab is 60 ft long is restrained from moving freely by a frictional base. The concrete has a density of 140 pcf and a tensile strength of 360 psi and compressive strength of 3500 psi.