introduce humidity in some form heat acts as the catalyst shortening the overall curing time but is not necessary for the hydration of the blocks of the present invention however due to the 28 day curing time of concrete the addition of heat accelerates the hydration process observation of the blocks continue as they continue to absorb moisture when the blocks no longer obtain weight the blocks are said to be at equilibrium and have absorbed all the moisture they will obtain and at that point should have enough water to completely hydrate the cement content however many times this is not obtained due to a variety of problems such as flash cure lack of total absorption the presence of admixes improper preset time etc the ideal situation for a block is to have enough water to completely hydrate the unit but not have the block slump coming out of the block forming machine it has been found that the present composition of the block discussed above enables the block to reach equilibrium at the strip cycle of the green block from the block forming machine that is removal of form 15 from the blocks whereby the blocks hold their shape and can be transported without adverse affect to chamber 21 where the blocks remain for a period of time where they dry by the heat of hydration in the ambient air eliminating the need of any additional heat and or moisture because of the required.