CMT3700 Assessment 2 (Practical) Answers Year 2025

Construction Materials IV

Practical Answers

Year 2025

, 1. SIEVE ANALYSIS - SANS 3001-AG1



1.1. Sieve analysis test is performed to determine the particle size distribution,
to ensure proper grading and to control quality.




1.2.


Total mass of sample…764.1 (g)

Sieve Size Individual Individual Cumulative Percentage
(mm) Mass Percentage Percentage Material
Retained Retained Retained Passed
(g) (%) (%) Rounded
off (%)
10 0 0 0 100
7.10 0.7 0.1 0.1 99.1
5.00 57.6 7.5 7.6 92.4
2.00 294.3 38.5 46.1 53.9
1.00 135.3 17.7 63.8 36.2
0.60 79.2 10.4 74.2 25.8
0.30 62.6 8.2 82.4 17.6
0.15 44.0 5.8 88.2 11.8
0.075 28.6 3.7 91.9 8.1

Fineness Modulus



𝑆𝑢𝑚 𝑜𝑓 𝑐𝑢𝑚% 𝑟𝑒𝑡𝑎𝑖𝑛𝑒𝑑 𝑓𝑟𝑜𝑚 5.0 𝑡𝑜 0.15𝑚𝑚 𝑠𝑖𝑒𝑣𝑒
1.3. Fineness Modulus (FM) =
100

= 362.3/100
= 3.6231
The average value of aggregate is in between the 3rd and 4th sieve from
the bottom. The average aggregate size is in between 0.6mm and 1.0mm2



1 SANS 3001- AG1. Civil engineering test methods Part AG1. Particle size analysis of aggregates by
sieving
2 ASTM C136, Standard test method for sieve analysis of fine and coarse aggregates