When Admixtures Turn Us into Chemists

When Admixtures Turn Us into Chemists

By Jason Spangler in Concrete Chemistry Concrete Moisture & Rapid RH® | 0 Comment

Admixture: ingredients (other than water, aggregate, hydraulic cement and fiber reinforcement) added to a batch of concrete or mortar before or during its mixing. The world of building and technology collide with the evolution of concrete admixture. This is due to the rise of chemical admixtures, those compounds which produce chemical reactions with the components […]

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Adhesive Breakdown and Flooring Betrayal

By Jason Spangler in Flooring Problems Wood Flooring Knowledge Base | 2 Comments

The new floor is in, and the diplomats are arriving for the show. What’s that smell? Why is glue seeping from the cracks between floor tiles!? Welcome to an adhesive breakdown in flooring, a catastrophic product of moisture content and high pH. Moisture vapor naturally evaporates from the surfaces of all concrete floors. If installers […]

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40%: Why Testing at the Correct Depth Is Crucial

By Jason Spangler in RH Testing Concrete Moisture & Rapid RH® | 2 Comments

All concrete slabs contain moisture and they always will. This is because concrete is composed of three main ingredients: water, cement, and aggregate. The three function together to form a concrete slab. Moisture problems occur when flooring installers and contractors do not permit sufficient time for the process of drying concrete. During this process, some […]

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Concrete Moisture: Calcium Chloride vs. Relative Humidity Testing

By Jason Spangler in Concrete Moisture & Rapid RH® | 2 Comments

All types of flooring can be susceptible to failure if moisture conditions are not properly monitored and maintained. But a slab’s moisture condition begins long before the flooring is installed. If the concrete slab has not been properly dried and cured before the flooring is installed, moisture problems are almost guaranteed. Moisture-related problems in flooring […]

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Mapping Out Your RH Test

By Jason Spangler in RH Testing Concrete Moisture & Rapid RH® | 0 Comment

In situ probes are a key element of relative humidity (RH) testing and of a contractor’s ability to accurately measure concrete slab moisture conditions because of their placement within the concrete slab. Once installed, builders must allow Wagner Meters’ Smart Sensors to equilibrate. But what is the strategy for proper sensor placement and for RH […]

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Calibration for RH Testing Made Easy

By Jason Spangler in RH Testing Concrete Moisture & Rapid RH® | 0 Comment

Relative humidity (RH) moisture testing in concrete requires a properly calibrated in situ probe to ensure accuracy. Calibration certainly makes good sense for your own protection in case any moisture-related issues arise in the future. In addition, compliance with ASTM F2170 certainly requires calibration and its accompanying documentation. So any way you look at it […]

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New, Eco-Friendly Concrete Shows Promise, but Still Requires Testing

By Jason Spangler in RH Testing Concrete Moisture & Rapid RH® | 0 Comment

In a 2011 global energy report, the World Wildlife Federation (WWF) declared that the concrete industry produces eight percent of the world’s annual carbon dioxide transmissions (primarily in the production process). Yet, production has quadrupled since 1970, and the WWF claims the industry can reduce its carbon footprint by 90 percent. Concrete 101 at Hyper-Speed […]

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External Influences on Internal Concrete Moisture Condition

By Jason Spangler in Concrete Chemistry Concrete Moisture & Rapid RH® | 3 Comments

There are several external factors that influence the moisture condition of a concrete slab. They are: Time Vapor retarders Bond breaking agents Heating, ventilation, and air-conditioning (HVAC) Concrete slab construction is an exercise in convergence. Builders apply several methods of facilitating the successful curing, drying, and hydration of concrete slabs. However, those processes and building […]

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