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Concrete is a material consisting of many coarse aggregates (particulate materials such as sand, gravel, crushed stone and slag) bound together by cement.
Cement is a substance used to bind materials, such as aggregates, by adhering to said materials, then hardening over time. While there are many types of cement, Portland cement is the most commonly used cement type and is an ingredient in concrete, mortars and plasters.
Cement Concrete can be purchased in multiple ways such as
- Delivered in large amounts by specialized concrete mixer trucks
- In 60 or 80-pound bags
Proper mixing of concrete ingredients is an essential part of the production of uniform concrete. Concrete mixing involves mixing water, fine and coarse aggregate, the quantity of cement, and any desired additives such as admixture, flash as per your requirement.
Production of concrete is a time-sensitive process, and the concrete must be placed of formwork and done compaction of concrete job before it hardens since it is usually formulated as a viscous fluid.
Sometimes concretes are even designed to harden more quickly for applications that require rapid set time(Rapid Hardening Concrete). Alternatively, concrete is mixed into dryer forms in some factory settings to manufacture precast concrete products such as concrete walls.
The process of concrete hardening once it has been placed is called curing and is a slow process. Generally concrete takes around 28days to gain over 90% of its final strength, and this process of strengthening can continue for up to three years.
Ensuring that the concrete is damp can increase the strength of the concrete during the early stages of curing. This is achieved through techniques such as spraying concrete slabs with compounds that create a film over the concrete that retains water and ponding, where concrete is submerged in water and wrapped in plastic.