The Concrete Calculator determines the required volume and weight of concrete to cover a specified area. Buying a little extra concrete compared to the estimated amount can decrease the risk of running out.
Concrete is a composite material composed of coarse aggregates (such as sand, gravel, crushed stone, and slag) held together by cement. Cement is an adhesive substance that bonds materials like aggregates together and hardens over time. Among the various types of cement, Portland cement is the most prevalent and is used in concrete, mortar, and plaster.
Concrete can be acquired in various forms, including 60-pound or 80-pound bags, or delivered in bulk by specialized concrete mixer trucks. Proper mixing of water, aggregate, cement, and any additives is crucial for producing strong, consistent concrete. The preparation of concrete is time-sensitive, and it must be placed before hardening, as it is typically prepared as a viscous liquid. Some concretes are formulated to harden rapidly for applications requiring quick set times. Conversely, in some factory settings, concrete is mixed into drier forms to manufacture precast concrete products, such as concrete walls.
The process of concrete hardening after placement is known as curing, which is a gradual process. Concrete typically attains over 90% of its final strength within four weeks, with strengthening continuing for up to three years. Maintaining concrete dampness during the early stages of curing can enhance its strength. This can be achieved through methods like spraying concrete slabs with compounds that create a water-retaining film, or ponding, where concrete is submerged in water and wrapped in plastic.
The proportion of sand, cement, and aggregate in concrete may vary depending on the intended use and specific location of the concrete. However, a common guideline is to mix 1 part cement, 2 parts sand, and 4 parts aggregate, or mix them in a ratio of 1:1.5:3
The M5 concrete ratio 1 : 5 : 10 (cement: sand : aggregate). .
The M7.5 concrete ratio 1 : 4 : 8 (cement: sand : aggregate). .
The M10 concrete ratio 1 : 3 : 6 (cement: sand : aggregate). .
The M15 concrete ratio 1 : 2 : 4 (cement: sand : aggregate). .
The M20 concrete ratio 1 : 1.5 : 3 (cement: sand : aggregate). .
The M25 concrete ratio 1 : 1 : 2 (cement: sand : aggregate). .
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