Concrete Dye is a water-based acid free finish and provides consistent color accuracy. It is available in 36 individual dye colors and it allows you to create your own custom color blends.
In a small container, mix the concrete coloring pigment with water, and then add to the concrete, according to the instructions on the bag. Tip: The more pigment you add, the more intense the color will be. Add a little more warm water than usual to the mix so it will pour easier into the bottle.
Whether you are staining new or old concrete, thorough surface preparation is essential. Unlike paints and coatings, which are opaque and can mask many evils, acid stains are translucent. Any residue remaining on the surface of the concrete is likely to be visible through the newly applied stain.
Cement essentially consists offour mineral phases: two calcium silicates, a calcium aluminate and a mixed crystal known as calcium aluminate ferrite (C4AF). While the first three appear as pure white minerals, pureC4AF has a brown color because of itsiron content.
Efflorescence is a chalky white salt residue that can occur with any product containing cement. As moisture migrates up to the surface of the concrete, it carries along with it calcium salts from within the concrete. When the salts reach the surface, they react with CO2 in the air and form insoluble calcium carbonate.
Tetracalcium Aluminoferrite (C4AF) contributes very slightly to strength gain. However, acts as a flux during manufacturing. Contributes to the color effects that makes cement gray. Tests. Magnesium Oxide (MgO) causes delayed expansion when present in large amounts.
Following are the different types of cement used in construction works.
- Rapid Hardening Cement: Rapid hardening cement is very similar to ordinary portland cement (OPC).
- Low Heat Cement:
- Sulfate Resisting Cement:
- White Cement:
- Portland Pozzolana Cement:
- Hydrophobic Cement:
- Colored Cement:
- Waterproof Portland Cement:
Cement is a mixture of different compounds. It consists of Calcium oxide(CaO),Silicon dioxide(SiO2),Aluminum oxide(Al2O3),Iron oxide(Fe2O3),Water(H2O),Sulfate(SO3) and do not have any specific formula.
The w/c ratio refers to the ratio of the weights of water and cement used in the concrete mix. A w/c ratio of 0.4 means that for every 100 lbs of cement used in the concrete, 40 lbs of water is added. For ordinary concrete (sidewalks and driveways), a w/c ratio of 0.6 to 0.7 is considered normal.
Multiply the three dimensions together to find the number of cubic feet (0.5' x 12' x 12 = 72 cubic feet) Divide the cubic feet by the number of cubic feet in a cubic yard (27) to find the number of cubic yards (72 ÷ 27 = 2.67 cu. yd.).
Calculate the volume you need in cubic yards. Multiply the length (10 ft.) by the width (10 ft.) by the depth (.35 ft., or 4 in.) and divide it by 27 (the number of cubic feet in a cubic yard). You get 1.3 cu.
Another "old rule of thumb" for mixing concrete is 1 cement : 2 sand : 3 gravel by volume. Mix the dry ingredients and slowly add water until the concrete is workable. This mixture may need to be modified depending on the aggregate used to provide a concrete of the right workability.
Yes; gravel acts as a coarse aggregate, and it makes the concrete denser. However, sand contributes more to the strength of the cement. The strength of concrete is essentially dependent on the ratio of the cement to water used in the concrete mix. The aggregates you use requires sufficient water to get a workable mix.
Quikrete's Concrete Mix yield's about .15 cubic feet for every 20 pounds of mix, so a 40-pound bag yields .30 cubic feet, 60 pounds of concrete mix yields .45 cubic feet and an 80-pound bag yields .60 cubic feet. One 50-pound bag of Quikrete Fast Setting Concrete Mix yields about .375 cubic feet.
How many 80 lb bags of concrete do I need for 1 yard? The finished volume of an 80# bag of Sacrete or Quikrete (pre-mixed cement, sand and gravel) is 0.6 cubic foot (stated on the bag). There are 27 cubic feet in a cubic yard. Dividing 27 cubic feet by the volume of the bag will give you the number of bags you need.
According to the table above, one cubic yard of concrete placed at a thickness of 5-inches covers 65 square feet. In a perfect universe, our 1,080 square foot driveway will need exactly 16.62 cubic yards of concrete (1,080 square feet / 65 square feet equals 16.62 cubic yards).
While ready-mix reduces work, it also boosts the cost. Each cubic yard costs about $65. However, a fully loaded cement truck will hold 10 cubic yards—and partial “short” loads cost $15 to $20 extra for every cubic yard less than a full load.