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A typical residential concrete slab is reinforced with welded wire fabric 6 x 6 – W1.4 x W1.4, which refers to the spacing in inches in each direction and the wire size nuer respectively. The reinforcing is laid onto the moisture barrier covering the crushed stone before the concrete is poured.
18/8/2007· He said the ACI specifiions call for the free fall of concrete from the end of the hose to be no more than 4 feet. In commercial placements, if the foundation is like 8'' or more high, a tube extension has to be added to the pump hose and dropped down into the foundation to within 4'' of the landing surface, be it the footer or the previous lift.
Slump is a measure of concrete consistency or fluidity. Consistency is the ability of freshly mixed concrete to flow. For given proportions of cement and aggregates (without admixtures), the higher the slump, the wetter the mix. Four-inch (4”) slump is very common
2 inch. ASTM C 94 (Ref. 2) re q u i r es the total mixing water, which influ-ences both slump and water- c e use a hose to spray additional mix Concrete to be pumped usually requires a high slump. Adding superplasticizers on-site, instead of water, can P
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1. Divide the thickness of your concrete by 12 (this gives you the depth in feet.) For example: For a 6 inch slab of concrete - divide 6 by 12 and you get .5 (a 6 inch slab is .5 feet thick) 2. Multiply 145 (pounds of a cubic foot) by .5 (thickness in feet) and you get