5 Types Of Concrete Mixes Predominantly Used In Construction
Concrete work relating to construction requires professional artistry, remarkable accuracy and a precise combination of tools and raw materials. However, not all construction projects have the same requirements, and different concrete mixes will be applicable for different types of work. The key to the different types of concrete mixtures lies in the amount of cement in each application to obtain the different desired properties for each application.
The setting time for a normal concrete application is thirty to ninety minutes, and it takes more or less seven days for the cement to start solidifying. It will require approximately twenty-eight days to obtain eighty percent of complete strength. Normal concrete has low tensile strength and high compressive capabilities. It is not suitable for areas with harsh weather conditions without being treated first and is generally used in areas with normal weather conditions.
High-performance concrete is carefully prepared with the right selection and preparation of specific cement mixtures and plasticizers added for enhanced workability. This concrete is super strong, is easy to work with, has good permeability, high density and gains strength early-on. The concrete can be mixed to resist freezing by adding air entraining agents into the concrete mix.
High-strength concrete is produced by lessening the cement to water ratio when mixing the concrete and adding silica to prevent strength diminution during the consolidating process. High-strength concrete is a little more challenging to work with due to the lesser cement to water ratio, but these type of concrete services are high in strength which makes it an excellent choice for construction of sidewalks and skyscrapers. Special focus needs to be placed on the selection of aggregates to maintain its strength for longer periods in time.
Air Entrained Concrete
Air entrained concrete is formulated when air entraining admixtures (chemicals that enhance the concrete traits) are added to the concrete mix. This type of concrete is especially suitable for areas which are prone to thawing or freezing. This concrete mix is one of the latest advances when it comes to concrete technology. The only disadvantage is that it has a lower strength capacity than traditional concrete.
This type of concrete is notably lightweight and has a lower mass per unit volume than any of the other concrete mixes. This application is lower in density and strength and is protected from freezing due to admixtures being added. This type of concrete is generally used for areas like sidewalk linings, decorative structures, parapet walls, road linings, etc.
Other Concrete Applications:
Dry Ready Mix – usually found at hardware stores. It is easy to mix with water for DIY projects at home.
Ready-Mix – the same as dry ready-mix except that water is already added. This concrete is pre-mixed and is generally used for larger DIY projects, is more difficult to find and is more expensive.
Bulk Dry Materials – when large building projects are done, it is more cost-effective to buy dry materials in large volumes. This allows the project to be more customized according to the usage and needs of the concrete.
Transit Mix – used for the majority of cast-in-place concrete projects. It is usually housed in concrete trucks with a large drum that keeps the cement from setting. One continuous pour is done with large concrete projects which are saving costs as less manpower is used.