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Concrete mix ratio: The strength of concrete mixture depends on the ratio in which these four ingredients are mixed. Concrete mix ratio of 1:3:3 - On mixing 1 part cement, 3 parts sand with 3 parts aggregate produces concrete with a compressive strength of 3000 psi.
Materials needed for mixing concrete. Concrete is a mixture of four ingredients: Sand, cement, aggregate and water. These need to be mixed together in a specific ratio, depending on the project at hand. The unit for measurement of concrete is cubic feet or cubic meters and one cubic meter equals 27 cubic feet.
for a complete description of concrete mix design. At a maximum allowable water/cement ratio of 0.5, you are going to end up with 4000 psi concrete. Since IRC apparently specifies a maximum allowable W/C ratio of 0.5 for concrete exposed to freeze/thaw, the minimum practical strength that would be delivered is 4000 psi concrete.
What Concrete Mix ratio should I use? 1/1/4 lime/OPC/sand for the scratch coat and 1/1/5 for the top coat. We usually put 2 coats of plaster on top of this. Base 2-3mm top coat 1mm. Do I need to attach a metal lathe, even though I am only applying 0.5 inches thick cement plaster coat? Depends on the condition of the brickwork.
Or is a higher psi not necessarily stronger. Im just trying to create a final product that will resist cracking or excessive chipping away from either general use or purposeful dropping. I am also trying to keep price/lb. of the concrete down. On sale, an 80lb bag of Sakrete 5000 Plus Concrete Mix is $4.
Instructions were lacking other than ratio to mix. At first it didn't seem to be working. I let it set half an hr and went back and am pleased with results for so little effort. It didn't say to rinse but I didn't want to take a chance on footprints, inside on the carpet, so rinsed it off plus didn't think it'd be good for the concrete.
Hello, I am ready to pour concrete into a 24" X 24" form set on top of the brick chimney. I need help with selecting the correct pre-mixed concrete. My cap will be 3" thick at the outer edges and 4" near the flue. I am using mesh reinforcement. I short-listed Quikrete sand-topping mix. Product 1103 as it mentions chimney cap. But the data sheet ...
The right concrete mix ratio can solve problems or it can create them. What you really want in a concrete mix is one that is easy to place, strong enough to meet the needs of the application, durable for the life of the floor or wall, and that will look good when you're done with your decorative efforts. Don't rely on bags!
Like Jo suggested fine grout may be better for you. If you will be laying block it sounds like you will have a mortar mixer on site. Fine grout will be able to be mixed in a mortar mixer, coarse grout (with stone) has to be mixed in a concrete mixer (spinning drum style). 1 part portland cement to a maximum 3 parts sand is a good ratio.
Anytime you mix cement and aggregate, the more surface area of the aggregate you have, the more cement that is required to coat all of the particles and tie them together. The extra cement requires extra water to make mortar more usable. It is difficult to compare mortar with concrete because they are designed to do different things.