Liquidation violations in a cash account occur if you sell securities after the purchase date of a new trade in order to cover that new trade. The primary difference between a liquidation and a freeride, is that with the liquidation you are selling securities other than the one(s) purchased.
Admixtures can be used to increase slump without increasing the water in the concrete. The type of aggregate, the air content, the admixtures, temperature and the proportions of all the ingredients affect slump. The typical slump used for a driveway is five inches plus or minus one. A pound per square inch (psi) is the unit of measurement used to describe the compressive strength of concrete.
The sand cover or hessian has to be kept wet and if they do dry out they actually aid in sucking moisture out of the concrete. 5. Use a plastic shield, which basically is a plastic sheet laid on top of the slab to stop the evaporation process. This is one of the most efficient methods of curing concrete.