The Real Costs: Calcium Chloride (CaCl) vs. RH Testing

The Real Costs: Calcium Chloride (CaCl) vs. RH Testing

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

For decades, flooring contractors have conducted moisture tests to verify the appropriate “dryness” of a concrete slab, prior to installing finished floor products. The anhydrous calcium chloride (CaCl) provided a moisture vapor emissions rate (MVER) which was the industry benchmark since the 1950s. In the 1990s, experts raised methodology concerns and suggested that the CaCl test did not […]

Read More

The Practicality of CaCl – A Test Message That Will Self-Destruct

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

Building contractors and flooring installers most often choose one of two methods to test for moisture in concrete slabs: either the calcium chloride (CaCl) test or the relative humidity (RH) test. ASTM International, which publishes technical standards for a wide range of materials, has developed standards for both tests. That doesn’t mean the two methods […]

Read More

The Bottom Line of RH Testing

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

Relative humidity (RH) testing is a 21st-century challenge to the traditional anhydrous calcium chloride test. Over the years, contractors have deployed various means of measuring concrete moisture content (MC). Calcium chloride testing dates back to the 1940s, and since that time, flooring contractors have shaken their heads as concrete moisture problems ensued. The anhydrous calcium chloride test said […]

Read More

Concrete MVER Testing Is Only Skin Deep

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

Whether it’s wood or concrete construction, knowledge empowers all players to assess moisture content for optimum results. Moisture Vapor Emissions Rate (MVER) Commonly called the calcium chloride test, MVER is a traditional measure of concrete moisture content. Due to its longevity, building contractors still use it. However, installers had used calcium chloride to measure concrete […]

Read More

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 […]

Read More

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 […]

Read More

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 […]

Read More

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 […]

Read More
Page 8 of 9« First...56789

Subscribe Now