Simply click here to return to General Concrete Questions. For a 10' x 10' slab that's 4" thick you'll need 56 bags of 80lb concrete. For a 6" thick slab you'll need 84 bags of 80lb concrete. Read More. This guide will tell you how many 50 lb.
View the nine basic steps involved in pouring concrete. Concrete Contractors: Get Job Leads. Estimating concrete prices is not an easy exercise, as many factors are involved in pricing concrete.
Some of these factors include the following: grading, subbase preparation, concrete forms and finishing, reinforcement, and the local cost of concrete. Cost will vary depending on the amount of dirt you need to move. Hourly rates apply for a tractor and operator. Cost for gravel or sand delivered to the job site. Read about subgrades and subbases here.
Labor is the biggest cost for concrete forms. Setting up concrete forms and finishing concrete is backbreaking work. A driveway, patio or sidewalk needs to be particularly strong, given the regular traffic it has to handle. During the curing process, concrete experiences shrinkage as the water evaporates.
This process can cause cracks or other imperfections in the concrete. Fibers can help to improve a concrete's resistance to shrinkage, which will in turn reduce its cracking.
Effect of fibers in concrete Fibers are usually used in concrete to control cracking due to plastic shrinkage and to drying shrinkage. They also reduce the permeability of concrete and thus reduce bleeding of water. Some types of fibers produce greater impact—, abrasion—, and shatter—resistance in concrete. Rebar is best utilized in a driveway for which inches of concrete can be poured.
This is because rebar is relatively thicker than galvanized mesh reinforcement. Salt does not damage concrete , but the effects of salt can. Salt does not chemically react with hardened concrete. Salt does however lower the freezing point of water, attract moisture, and increase pressure of frozen water. Therefore, for a typical mm residential concrete slab , the rebar should be placed at a depth of approximately two thirds the slab thickness from its surface.
Placing the rebar at the bottom of the slab will provide no benefit to the concrete. How much is fiber concrete per yard? Category: business and finance construction industry.
It is commonly thought that since the amount of mesh must increase as slab thickness increases, the same would be true with fibers — as the slab thickness increases so would the fiber dosage.
But this is not the case, for the simple reason that fiber dosage is calculated using volume, and mesh is calculated using area. ACI lists two areas of steel to limit crack width. Here is the formula —.
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