Why is it important to minimize the alkali metal content of concrete?

Pasquale Keeling asked a question: Why is it important to minimize the alkali metal content of concrete?
Asked By: Pasquale Keeling
Date created: Sat, Apr 3, 2021 12:00 PM

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Those who are looking for an answer to the question «Why is it important to minimize the alkali metal content of concrete?» often ask the following questions:

👉 Why is moisture content important in concrete?

How Moisture Affects Concrete Strength. Increased space between cement grains: Higher water-to-cement ratios result in greater spacing between the aggregates in cement, which affects compaction. Similarly, increased moisture levels reduce the concrete's compressive strength and durability.

👉 How to find moisture content concrete?

One way to get a relatively reliable assessment of moisture near the surface of a concrete floor is to use the ASTM F-1869 calcium chloride test. These tests determine the moisture vapor emission rate of concrete, and can provide a decently reliable estimate of moisture conditions in the surface of a concrete slab.

Question from categories: free moisture content formula water content moisture content formula moisture content definition moisture content formula dry basis moisture content formula

👉 What does air content tell in concrete?

  • Air content is very important to the project engineer. The amount of air can increase or decrease the strength of the concrete, can determine whether the concrete is protected from freeze-thaw conditions or is prone to weathering, and can affect the finish and cosmetic look of the concrete.

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It is important to minimize the alkali metal content of concrete because concrete contains trace amounts of alkali metals like sodium and other minerals and if moisture is present then the sodium reacts with the minerals in the concrete, forming a gel and the gel may absorb water and expand causing cracks in the concrete.

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