Entries by admin

Tech Brief: Hot Weather Concrete

SCP Tech Brief: Hot Weather Concrete Placing concrete in hot weather poses one of the greatest challenges in construction. This is because concrete gains the majority of its properties during the temperature-dependent cement hydration reaction. Temperature of the concrete, surrounding air temperatures, and form temperatures can all play a substantial role in the quality of […]

Tech Brief: Cold Weather Concrete

SCP Tech Brief: Cold Weather Concrete Portland cement concrete relies on chemical reactions between cementitious materials and water, known collectively as hydration, to harden and develop strength. Like most chemical reactions, the rate of early-age hydration is significantly temperature-dependent. Generally, as concrete temperature rises, the time for hydration to occur shortens and vice-versa. The American Concrete Institute produces two […]

Tech Brief: Concrete Cracking

SCP Tech Brief: Concrete Cracking An unfortunate truth in concrete construction is that concrete cracks. There is no magic technology that solves all forms of concrete cracking. When properly used, Spray-Lock Concrete Protection (SCP) products may help reduce the chances of some forms of cracking, but not all. In this technical brief, you will learn […]

SCP Products and Special Purpose Aggregates

SCP Tech Brief: SCP Products and Special Purpose Aggregates The choice of aggregates for a concrete mix design is a critical decision that affects fresh and hardened performance. When the need arises to use a special purpose aggregate for reasons such as making concrete that is heavier, lighter, or different in appearance, the considerations for […]

SCP and Vapor Retarders

SCP Tech Brief: SCP Products and Vapor Retarders/Barriers ACI 302R-15 Guide to Floor and Slab Constructioni discusses vapor retarders/barriers at length. Vapor retarders/barriers are meant to minimize the transmission of water vapour through a concrete slab from sources located beneath the slab but have no effect on water vapor that comes from the concrete itself. There is no […]

SCP Tech Brief: Concrete – Drying vs. Curing

The difference between “drying” and “curing” of concrete may not always be readily apparent. These terms are often incorrectly treated as interchangeable, especially in reference to concrete that will receive flooring materials. The following definitions of drying and curing are provided to assist in guiding the discussion on these two very important and distinct processes. […]

How do SCP Products Reduce Drying Shrinkage?

SCP Tech Brief: How Do SCP Products Reduce Drying Shrinkage of Concrete? One of the issues facing conventional concrete is that concrete shrinks. This mechanism of volume change can lead to cracking of the concrete structure. Concrete shrinkage is in response to the loss of water that is held in the pore space of the concrete. This […]

SCP Products vs. Dry-Shake Surface Hardeners

SCP Products vs. Dry-Shake Surface Hardeners Abrasion resistance is a property of concrete that is important in structures that are subjected to repeated traffic from vehicles or repeated scouring from the movement of water or other liquids containing particulate matter.  Although not normally a structural concern, abrasion of concrete can cause dusting, and may reduce […]

Improving Freeze/Thaw Performance of Concrete

SCP Tech Brief: Improving Freeze/Thaw Performance of Concrete Spray-Lock Concrete Protection (SCP) technologies close capillary void space in concrete, significantly reducing permeability to liquids. Because of this action, the ability of liquid water to enter the concrete to then subsequently freeze and cause freezing/thawing damage is mitigated. This generally translates to longer service life of […]

SCP Compared to Silicate Salts Used as Admixtures

Silicate Salt Admixture Behavior in Concrete – What Does It Do?  The silicate salt admixtures, generally comprised of sodium, potassium, or lithium silicates work by the formation of Calcium Silicate Hydrate (C-S-H) as the mechanism of closing void structure to decrease permeability of concrete. While a track record of permeability reduction may have been established, […]