High Early Strength Concrete

(High Early Strength Concrete)

high early strength concrete is a type of high performance concrete, which can achieve structural concrete quality (compressive strength > 21 MPa) within 24 hours after site-pouring. This is useful for construction applications, such as rapid stripping of formwork, and putting structures in service quickly.

There are several methods that can be used to produce high early strength concrete, including low water to cementitious materials, using chemical admixtures and supplementary cementitious materials, or autoclave curing. While these approaches can produce more strength, they can also require additional time, money, and materials.

One method that can be used to develop high early strength concrete is to replace a portion of the fine aggregate by ground granulated blast furnace slag or fly ash, which reduces the water requirement without significantly changing the concrete’s strength development rate. This is a cost-effective and environmentally friendly approach that could be incorporated into many projects.

Another method is to add an early strength agent such as nano C-S-H to the concrete mixture, which accelerates the hydration process and contributes to the early high strength of the concrete. However, this can only be accomplished through a controlled method of mixing and curing.

This method can be a beneficial way to increase the strength of concrete, but can be problematic if it is not used correctly. A number of potential problems can occur, such as the emergence of micro-cracking, a weakening of the concrete’s durability, and a reduced resistance to stress corrosion cracking.

(High Early Strength Concrete)