Curing Compounds

 Evencure liquid impermeable-membrane curing compounds are “apply and forget” systems that effectively, efficiently and economically replace labour intensive curing systems such as wet hessian, polythene or ponded water. These latter systems whilst effective if utilised properly, require constant maintenance because they are very easily disrupted by atmospheric conditions such as winds or high temperatures. Evenrange can supply the curing compound most suited to your needs whether it be water based, solvent based, bituminous and chlorinated rubber.

WHAT IS CURING?

Curing has a strong influence on properties of hardened concrete such as durability, strength, watertightness, wear resistance, volume stability and resistance to freezing and thawing.
When Portland cement is mixed with water, a chemical reaction called hydration takes place.

The extent to which this reaction is completed determines the strength, durability and density of the concrete. Most fresh concrete contains considerably more than enough water for completed hydration of the cement; however any appreciable loss of water by evaporation or otherwise will delay or prevent completed hydration. Since hydration is relatively rapid the first few days after fresh concrete is placed, it is important for the water to be retained during this period, that is, for evaporation to be prevented or at least reduced.

WHY CURE CONCRETE?

The objects of curing are:

• To prevent the loss of moisture

• To control the concrete temperature for a definite time

With proper curing, the concrete will become stronger and more resistant to stress, abrasion and frost. The improvement is rapid at early ages but continues more slowly for an indefinite period. When moist curing is interrupted, the development of strength continues for a short period and then topes. However, as moist curing is resumed, strength development will be reactivated. Loss of water will also cause the concrete to shrink, thus creating tensile stresses at the drying surface. If these stresses develop before the concrete has attained adequate tensile strength, surface cracking can result. Exposed surfaces, including exposed edges and joints, must be protected against moisture evaporation.