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3 cards from this section. Quick, good the night before a test.
What is specific gravity?
Think about how it relates materials of different densities.
What does water absorption measure?
What could happen to concrete if aggregates absorb too much water?
What is the apparent specific gravity formula?
Remember which dimensions we leave out.
Water absorption values in aggregates typically range from?
Think about the impact of higher absorption on durability.
An aggregate sample has a dry weight of 1.5 kg and weighs 1.7 kg when saturated. Calculate the water absorption and discuss its potential impact on concrete performance.
Use the water absorption formula and think about long-term performance.
If a bulk specific gravity of an aggregate is found to be 2.7 and apparent specific gravity is 2.5, what can you infer about the water-permeable voids?
Look at the relationship between the two specific gravities.
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