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2 cards from this section. Quick, good the night before a test.
What is the main purpose of sieve analysis?
Think about why we care about the size of aggregates in concrete.
What does a series of IS sieves help us classify?
Look for a method that involves separating particles by size.
What does sieve analysis primarily determine?
Think about what information sieve analysis aims to provide for concrete.
True or False: Sieve analysis can help identify segregation in aggregate samples.
Consider how the distribution reveals issues in aggregate quality.
A sample of coarse aggregate weighing 200 kg is passed through a series of sieves. The weights retained on each sieve are as follows: 25 mm (30 kg), 20 mm (50 kg), 10 mm (80 kg), and pan (40 kg). Calculate the percentage retained on each sieve and plot the particle size distribution curve.
Calculate each percentage based on the total weight of the sample.
Given a sample with 60% particles below 10 mm and 40% above 10 mm, how might this affect concrete strength if this gradation is not corrected?
Consider how the size of particles influences the packing and strength of concrete.
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