3.3.1 Individual component: The individual component comprises two questions that need to be answered and submitted individually, accounting for 50% of the coursework assessment. The answers to the questions in the individual component must align with the educational materials presented in the module during lectures, seminars, and laboratory sessions, and it is essential to provide the calculation details for at least one sieve sample. Q1: Three aggregate samples of A, B, and C are sieved using a set of sieves with different sizes (212 μm- 37.5 mm) to obtain the grading curves. The following table shows the amount remaining in each sieve after shaking. The values of remaining samples are the sum of the given values in the table and the last two digits of your ID (AB) (e.g. w30027530, AB-30 and for a given value of 200 in the table would give 200+30=230). a) b) c) Sieves (mm) Sample A (g) Sample B (g) Sample C (g) 37.5 0 0 0 28.0 0 500+ AB 0 20.0 200+ AB 100+ AB 0 14.0 1200+ AB 0 0 10.0 1000+ AB 0 0 5.0 200+ AB 0 0 3.2 0 0 15+ AB 2.4 0 20+ AB 15+ AB 1.2 0 30+ AB 25+ AB 600 μm 0 70+ AB 50+ AB MCE | Learning and Teaching 425 μm 0 50+ AB 70+ AB 300 μη 0 40+ AB 80+ AB 212 μm 0 15+ AB 25+ AB 20+ AB Base Pan 0 15+ AB | Page 2 of 6 Calculate the percentages passing through each sieve and plot the grading curves of three samples (Percentage passing versus Sieve size). (6 Marks) Identify which samples are: (a) fine aggregate, (b) coarse aggregate, and (c) gap-graded aggregate, and justify your answer. (4 Marks) The coarse and fine aggregates listed in the table above are employed in a mix design for constructing a concrete element, with (60+0.2xAB, where AB is the last two digits of your ID) kg of coarse aggregate and (40-0.2xAB) kg of fine aggregate. Determine the percentage passing through each sieve for the combined gradation of coarse and fine aggregates and illustrate the grading curve for this combined gradation. (10 Marks) If the last digit of your student ID ends in 2, 3, or 4, you are required to answer question Q2-2. Q2-2: a) Compare and discuss the flexural response of the plain and reinforced concrete beams tested by your group with that of others, in terms of flexural tensile strength of both beams (assuming a cross session of 100 mm x 100 mm and beam span of 300 mm for the other group's concrete beams) and toughness of only reinforced concrete beam. (15 Marks) b) Discuss the sustainability of the beams tested by your group in comparison to those of other groups and explore strategies to enhance the beams' sustainability. (15 Marks)