The first patent-pending concrete system to internally cure concrete.

What is E5 Concrete Technology?

E5 technology is the first integral concrete finishing system that delivers targeted solutions to leading industry challenges. E5 is the only patent-pending system in the world to chemically bind nano silica in concrete at the initial reaction point. This revolutionary system internally cures concrete and creates stronger, more durable concrete that resists chemical and physical attack. E5 nano silica alters the backbone of concrete through internal curing and increases resiliency through pozzolanic reaction and particle-to-particle packing.

How does properly curing improve concrete?

E5 technology helps concrete realize its maximum potential with an efficient, economical and sustainable process. It improves hydration, reduces early cracking, reduces chloride ingress, reduces curling and improves durability, all of which extend the concrete’s service life.

From a broader perspective, poor field curing, along with concrete’s inability to fully cure, has robbed the industry of concrete’s maximum potential. Internal curing provides something that conventional curing cannot retain: water. E5 technology controls water loss and creates up to 30% greater cement hydration efficiency.

How will E5 benefit the construction process?

E5 systems eliminate the need for traditional curing methods. Contractors gain immediate access for construction, saving up to 7 days over wet curing requirements. Costly and time-consuming removal of topically applied membranes is eliminated, maintaining warranty compliance for flooring. Concrete workability is improved, facilitating greater production capacity and improved finished quality.

What is the scope of current E5 Applications?

E5 products have been used in over 10 million square feet of concrete in a variety of medical, retail, industrial, civil and institutional applications. Customers include American Honda Motor Co., Four Winds Casino, Amazon, Facebook, Subaru Corporation, Rolls-Royce, IU Medical, St. Francis Health and Nokian Tyres. The technology has also been validated by engineering teams at Haskell and the Colorado Department of Transportation.

What is internal curing?

Utilizing nano silica to cure concrete.

Concrete is one of the most common and reliable construction materials in the world and is composed of cement, water, sand, and rock. The importance of water to aid the finishing of concrete is well known in the concrete and construction industry. As a result, curing of the concrete is an extremely common practice of supplying water on the surface of the concrete to create a creamy concrete that is easy to place. More recently however, internal curing has been utilized to hydrate the concrete after it is set. So what is internal curing and how can it be used to improve concrete?

The American Concrete Institute in 2018 defined internal curing as “supplying water throughout a freshly placed cementitious mixture using reservoirs, via pre-wetted lightweight aggregates, that readily release water as needed for hydration or to replace moisture lost through evaporation or self-desiccation” (American Concrete Institute, 2018). Basically, the goal of internal curing is to prevent water from leaving the concrete.

As water leaves the concrete, several negative effects are observed. One such problem is bleed channels which result in excess bleed water at the top of the surface. As the concrete begins to set, excess water migrates through the porous cementitious matrix leaving open channels within the concrete surface and subsurface. These channels allow for harmful chemical agents from the environment to leach into the concrete and reduce the strength and durability of the concrete structure. Additionally, the water leaving the concrete is necessary for proper hydration of the concrete mixture. Internal curing not only helps to prevent the bleeding of water through concrete, but it also allows water to penetrate deeper into the concrete mixture.

E5 Internal Cure alters the back-bone of concrete through internal curing and increases resiliency to physical and chemical through pozzolanic reaction and particle-to-particle packing.

Unlike traditional curing that does not allow water to penetrate much beyond the surface of the concrete, internal curing provides water that is dispersed throughout the depth of the concrete (Federal Highway Administration). Furthermore, internal curing does not affect the water to cement ratio. The water cementitious ratio, the ratio between water and cement in concrete, is determined before the concrete is set. By adding water with internal curing, the excess water does not affect the pore structure and only aids in hydration of the concrete. Bentz and Weiss found that this results in a reduction in shrinkage. The water from the aggregate will fill the pores of the concrete which helps prevent concrete shrinkage (Bentz and Weiss). Additionally, the increase in hydration increases the reaction of the cementitious materials and therefore improves the performance of the concrete (Federal Highway Administration). The increased hydration also improves the performance of innovative technologies, including nano silica.

E5 nano silica prevents the bleed water channels that carry contaminates throughout the surface and subsurface. A less permeable substrate protects the concrete matrix from rapid deterioration. The homogenous mixture created with nano silica results in concrete pavement that is not only resistant to de-icing salts and chemical attack, but the prevention of bleed channels with internal curing creates a pavement more resistant to steel corrosion and premature failure. Additionally, internal curing with nano silica reduces moisture and salt migration which leads to a concrete that is more resilient to adhesion bond failure and delamination of floor coverings.

The concrete industry is evolving to embrace new and improved technologies and practices. This includes the revolutionary practice of utilizing internal curing along with E5 nano silica to produce stronger concrete that is more resistant to chemical and physical attack experienced every day after placement.

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