Acceptable Use of Calcium Chloride in Concrete

Acceptable Use of Calcium Chloride in Concrete

Under some conditions, ACI 318-08 prohibits the use of calcium chloride. ASCC contractors will work with the producer and engineer to encourage an acceptable use of calcium chloride that provides benefits to the owner. If you have any questions, contact your ASCC concrete con-tractor or the ASCC Technical Hotline at (800) 331-0668.

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Acceptable Use of Calcium Chloride in Concrete - ASCC

Acceptable Use of Calcium Chloride in Concrete. ASCC Position Statement #31 . ACI 318-08, “Building Code Requirements for Structural Concrete,” with some exceptions, allows calcium chloride as an accelerating admixture for cast-in-place concrete. But many specifications prohibit its use. This is unfortunate because calcium chloride is the ...

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The Role of Calcium Chloride in Concrete Cross ...

Jan 24, 2020  Calcium chloride accelerates cement’s rate of hydration. A reduction in setting time helps protect freshly placed concrete. The effect is most noticeable in cool weather. Ready-mixed concrete sets more slowly at temperatures below 70°F, and even more so between 30°F and 50°F. This means concrete construction can continue in the fall and ...

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CBD-165. Calcium Chloride in Concrete - NRC-IRC

Calcium Chloride in Concrete. Originally published 1974. V.S. Ramachandran. The addition of small amounts of certain materials to concrete to promote desirable properties is as old as the use of cement itself. The Romans used blood, pig's fat and milk as additions to pozzolanic cements to improve their workability and durability. Today, many ...

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The Role of Calcium Chloride in Concrete Cross ...

Jan 24, 2020  Calcium chloride accelerates cement’s rate of hydration. A reduction in setting time helps protect freshly placed concrete. The effect is most noticeable in cool weather. Ready-mixed concrete sets more slowly at temperatures below 70°F, and even more so between 30°F and 50°F. This means concrete

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CBD-165. Calcium Chloride in Concrete - NRC-IRC

Calcium Chloride in Concrete. Originally published 1974. V.S. Ramachandran. The addition of small amounts of certain materials to concrete to promote desirable properties is as old as the use of cement itself. The Romans used blood, pig's fat and milk as additions to pozzolanic cements to improve their workability and durability. Today, many ...

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Calcium Chloride in Portland Cement Concrete

Calcium chloride dissolves easily in cold water with continuous agitation. Always add calcium chloride to the water; do not add water to calcium chloride. Never use hot or warm water to dissolve calcium chloride. Heat is released during dissolution. Avoid splattering hot solution. Allow the solution to cool before use.

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Calcium Chloride - Concrete Engineering general discussion ...

Mar 22, 2007  I always heard don't use chlorides in reinforced concrete but was told that ACI 318 has acceptable amounts based on table 4.4.1. RE: Calcium Chloride civilperson (Structural) 22 Mar 07

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Role of Calcium Chloride in Concrete - The Constructor

Calcium chloride is known to increase drying shrinkage, the magnitude depending on the amount of calcium chloride added, the type of cement, the period of curing, and environmental conditions. 6. Efflorescence. Due to use of calcium chloride in concrete, a whitish deposit is formed on the cured concrete surface in some instances.

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Chloride content limits recommended by ACI Committee 201

Calcium chloride dihydra t e — Crystalline calcium chloride combined with 2 moles of water per mole of anhy-d r ous salt. Has the chemical formula Ca C l 2 _ 2 H 2 O. Calcium chloride flake—A commercial grade of calcium chlori d e . Some manufacturers produce it from anhy-d r ous calcium chloride and others from the dihyd ra t e.

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Concrete Acceleration – Peters Chemical Company

Scroll down for guidelines on the use of calcium chloride in Portland cement concrete. For more information, visit our web site at peterschemical, or contact The Peters Chemical Company Customer Information Group at 1-973-427-8844. References: “Effect of Calcium Chloride on Portland Cements and Concretes.”.

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Moisture Testing of Concrete Slabs Moisture Vapor ...

blocking moisture from migrating upward to the concrete. It is recommended concrete slabs be placed directly on the vapor retarders. (See figure 1.2 above) Moisture Testing . Two of the more common moisture testing methods in use today when installing resilient flooring are the anhydrous calcium chloride test and the internal relative humidity ...

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What Are the Dangers of Calcium Chloride? Livestrong

May 09, 2019  Calcium chloride is also often used as a concrete accelerator, according to the American Society of Concrete Contractors. The substance makes for an inexpensive and efficient way to speed up the rate at which concrete dries. However, there are certain restrictions in place that dictate the amount of calcium chloride permitted in concrete.

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Concrete Moisture Test - How To Test For Moisture In a ...

How to do a calcium chloride test on a concrete floor. Calcium chloride tests have been around since the 1960's. These concrete moisture test kits are readily available on the internet from suppliers like Amazon (see below). To test, you simply place a pre-weighed dish of calcium chloride on your concrete floor, then cover and seal it with the plastic dome they supply.

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Common Questions Asked About Moisture Testing Vaprecision

Common Questions Asked About Moisture Testing Q - What happens if I run the calcium chloride test in less than 60 hours? A - If the building has a highly controlled interior atmosphere, the test can be run as short as 48 hours. However, the purpose of running the test between 60 and 72 hours is to get a good sampling of the moisture emission volume as a function of time.

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Concrete Moisture Testing - Simiron

The calcium chloride is a desiccant and will absorb moisture from the concrete. This absorbed moisture will increase the weight of the calcium chloride in the dish. The weight gain is expressed in pounds of moisture emitted from 1,000 square feet in a 24 hour period. One

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How to test for moisture in concrete before a laminate ...

Aug 21, 2010  Calcium chloride test ASTM F1869-09 produces quantified results of the amount of moisture vapor emitted from a 1000 ft 2 area (measured in pounds) over a 24-hour period. To be effective, the test site should be at the temperature and humidity levels experienced during normal use.

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Why Upgrade Your Spec? - Concrete Moisture Test Spec

Every aspect of a building’s design from the ground up reflects on your reputation. Assuring correct concrete moisture levels in the concrete slabs is critical to preventing failures in floor covering systems. So why put your reputation on the line by specifying outdated concrete moisture methodologies? The new version of the ASTM calcium chloride standard []

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Role of Calcium Chloride in Concrete - The Constructor

Calcium chloride is known to increase drying shrinkage, the magnitude depending on the amount of calcium chloride added, the type of cement, the period of curing, and environmental conditions. 6. Efflorescence. Due to use of calcium chloride in concrete, a whitish deposit is formed on the cured concrete

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Chlorides and Concrete Concrete Construction Magazine

Dec 05, 2006  Way back in the 1950s, when we worked at the Portland Cement Association (PCA), the use of 1% or 2% calcium chloride in concrete to accelerate strength development was common and permitted by the American Concrete Institute

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Concrete Acceleration – Peters Chemical Company

Scroll down for guidelines on the use of calcium chloride in Portland cement concrete. For more information, visit our web site at peterschemical, or contact The Peters Chemical Company Customer Information Group at 1-973-427-8844. References: “Effect of Calcium Chloride on Portland Cements and Concretes.”.

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Calcium Chloride in concrete for perimeter foundation ...

May 19, 2011  Here in Toronto Canada it is a very common test. Contrary to what some have said on this site, it is not against Code to use calcium chloride in the concrete - in fact there was a paper in ACI Concrete International about a year ago, by a trade organization, promoting its use in concrete that is in permanently dry envionment.

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Calcium Chloride Concrete Slab Discoloration

Sep 28, 2014  If the calcium chloride is not mixed thoroughly in the concrete it can lead to discoloration. There are also other complicated chemical reactions that can happen with the Portland cement and other additives (fly ash, slag, etc.?) that *might* be in the concrete. You can get trowel burns, which produces a darkening, when you use calcium chloride.

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Concrete Slab Moisture Content - MFMA

Use a prepackaged calcium chloride test (widely available) and follow the manufacturer's instructions. The Calcium Chloride Test measures the quantity of moisture passing through a concrete floor. This measurement is stated as pounds of moisture over a 1,000 sq. ft. area during a 24-hour period. An acceptable level is 4.5 lbs. or less.

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Can Calcium Chloride Pounds Be Converted ... - Wagner Meters

May 20, 2021  In fact, calcium chloride testing has been specifically disallowed for lightweight concrete applications because the lightweight aggregate can impact results for false high or low results. The limits set for the test (i.e. 3 lbs/1000 sq ft) were somewhat arbitrarily chosen and published.

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Concrete Moisture Testing - Simiron

The calcium chloride is a desiccant and will absorb moisture from the concrete. This absorbed moisture will increase the weight of the calcium chloride in the dish. The weight gain is expressed in pounds of moisture emitted from 1,000 square feet in a 24 hour period. One

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CIP 2 - Scaling Concrete Surfaces

Apr 02, 2020  composed of calcium chloride and sodium chloride (rock salt) are considered acceptable for concrete. Never use ammonium sulfate or ammonium nitrate or magnesium-based salts as a deicer; these are chemically aggressive and destroy concrete surfaces. Magnesium-based salts are used for pre-snow deicing

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Moisture Testing and Mitigation in Concrete Subfloors

Sep 10, 2019  Moisture in concrete should be measured by an anhydrous calcium chloride test kit per the ASTM F-1869 test method or by using an in-situ probe test for relative humidity (RH) per the ASTM F-2170. Three tests must be performed for the first 1,000 sq. ft. and one for every 1,000 sq. ft. thereafter.

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Calcium Chloride Moisture Test vs. Relative Humidity Test

May 20, 2021  Calcium chloride testing involves sealing a small dish of calcium chloride on a clean section of concrete under a plastic dome. The salt absorbs moisture in that environment (and presumably coming from the concrete slab) and the weight gain after three days is used to calculate the MVER. While this method is still specified by many flooring ...

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Moisture Vapor Emission Testing, specs How to Duraamen

The calcium chloride test, sometimes called the moisture vapor emission rate (MVER) test, is simple inexpensive and widely accepted. It takes advantage of the fact that calcium chloride absorbs moisture like a sponge. A small container of salt is weighed before and after it’s exposed to the concrete

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Moisture in Concrete - EF Contract Flooring

The Calcium Chloride Test (ASTM F1869) determines the moisture vapor emission rate (or MVER) from a concrete slab. The test has been in-use for decades, although the results are sometimes questionable. Calcium Chloride is a white deliquescent compound, used as a drying agent, refrigerant, and preservative.10 The test

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Testing Services – Moore Engineering Services

Using a dish of calcium chloride covered by a plastic dome, the moisture vapor emission rate is measured as moisture is absorbed by the calcium and increases in weight. The resulting calculated value is expressed in units lbs/1000 square feet / 24 hours, acceptable values are dependent on the product specifications but are usually required to ...

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