PREVent-C: Admixture That Can Reduce Concrete Shrinkage Problems

The cost of shrinkage cracks can be minimized with this admixture


 PREVent-C is an admixture that can be added to ready mix concrete, mortars and precast concrete that will prevent cracks related to shrinkage of concrete. It can be used with both air-entrained and non-air entrained concrete and it can be used safely with all steel and other concrete components. 

Benefits of Using PREVent-C Admixture

The concrete admixture will prevent the concrete from shrinking. When the product is used, the concrete will tend to dry in a progressive control way so heat will be released uniformly in the concrete mix.

By doing this, the chance for cracks to show up will be reduced, minimizing the cost of repairs and liabilities associated with these problems.Crack repairs can increase maintenance costs and can lead to legal battles trying to determine what went wrong and who is responsible for handling this repairs.

Why PREVent-C Is Good for You

PREVent-C can be used in all types of concretes and mortars, whether cast-in-place, mass, precast or prestressed. The material can be used in straight Portland cement mixes or blended cement mixes. Typical applications include bridge decks, parking structures, dams, runways, stadiums, flooring applications, decorative concrete, and masonry or tile grouts and mortars. The material is especially effective where concrete is highly restrained, like with most steel or other reinforced concrete applications. It is also effective with both air-entrained and non-air entrained concrete.

Because it is a free-flowing powder, PREVent-C can be pre-blended with dry packaged mixes, mortars and grouts, or added at the time of use. The material also is effective for use with shotcrete mixes. PREVent-C reduces both drying and autogenous shrinkage-induced macrocracks and microcracks in concrete, which enhances its sustainability.

PREVent-C does not contain chlorides or other materials that could contribute to corrosivity of reinforcing steel.

Usage Instructions

The admixture shall be added to the concrete mix as powder, just like regular cement. The product needs to be added before any other admixture or water and you need to allow sufficient time for it to mix into the concrete. It is recommended to mix for at least 60 seconds to ensure proper distribution. Do not pre-dissolve or mix with water before adding it to the concrete. It is always recommended to test the admixture with the approved concrete mix before using it in your batch to determine if there are any unusual reactions associated with it. It can generally be added at a rate of 5 pounds per 100 of cement in concrete.The product is not a substitute for curing concrete.

Admixture Applications

The admixture is recommended to be used for the following applications:

  • Dams
  • Water and Wastewater applications
  • Bridge and concrete decks
  • Shotcrete
  • Slabs on grade
  • Pavements and Carports
  • Parking Garages
  • Architectural Concrete
  • Walls and facades
  • Industrial floors
  • Retaining Walls
  • Basements
  • Sidewalks

Benefits of the Admixture

The most important benefits of using PREVent-C are:

  • Reduces shrinkage cracking
  • Reduces compressive creep
  • Improves durability
  • Decreases curling and related cracks
  • Allows for reduces used of control joints
  • Reduces water and salt infiltration
  • Minimizes claims and maintenance work related to cracks in concrete
  • Provides a better finished surface area
  • Reduces concrete placing time that normally is increased when working with control joints