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2 cards from this section. Quick, good the night before a test.
What gas is produced when calcium carbide reacts with moisture?
Think of the flammable gas that you use in welding.
Why is moisture content important in concrete?
Consider how too much or too little water could change the mix.
What is produced when calcium carbide reacts with water?
Think of the use of acetylene in welding.
True or False: The Calcium Carbide Method is slower than the oven drying method.
Consider which method uses more time.
You have a construction site using the Calcium Carbide Method. If the measured pressure indicates a moisture content of 5%, calculate the appropriate water needed for a 1m³ concrete mix with a water-cement ratio of 0.5.
Calculate the total water needed and adjust for the moisture content.
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