The cost of high early strength concrete can be quite expensive depending on the PSI (pounds per square inch) and the type of concrete. Many projects require a minimum PSI to pass inspections and to ensure that the structure is safe for use. This is especially true for outdoor projects such as sidewalks, driveways, and floor slabs. Using the correct PSI is essential to save money on construction costs and to minimize downtime during repairs.
In order to produce high-early strength concrete, a special type of cement must be used. This type of cement is called type III or high-early strength cement, and it reacts much quicker than regular Portland cement. In addition to this, type III cement has a higher water content, which helps the concrete set quickly. This fast reaction time and the increased water content help the concrete to reach its peak strength sooner, which saves both money and labor.
Another way to produce high-early strength concrete is by using a combination of hydration retarders. These are chemicals that slow down the rate at which water enters the concrete. This is done by adding them to the concrete mix prior to pouring. It is also possible to use type III cement in conjunction with polycarboxylic superplasticizers. These are a group of chemicals that improve the workability and strength of the concrete.
The price of high-early strength concrete is typically around $150 to $170 per cubic yard or $1,405 to $1,595 for a full load delivered. In addition to the cost of the concrete, other expenses may include formwork. If the project requires a sidewalk or driveway, this can cost $2 to $3 per linear foot for plywood forms with stakes, nails, and form oil. If the project requires concrete for a foundation or building wall, the costs can be more substantial at $6 to $10 per square foot of contact area for formwork.