Question $2$:

$(26$ marks$)$

Perform the Compressive Strength test in the same Virtual Lab "Self$-$Compacting Concrete" on EIT remote labs for the same two concrete mixes as above.

a$)$ Briefly describe how the compressive test is conducted and use one set of test data to illustrate how the compressive strength is calculated.

$(7$ marks$)$

b$)$ Use a table to summarize and compare the $28-$day strength of the two concrete mixes. Explain the difference in their average $28-d$ strength again based on their mix proportions.

$(10$ marks$)$

c$)$ Use another table or a figure to compare the average $3-$d$,7-$d and $28-$d strength of the two mixes and explain the effect of age on the concrete strength.

$(9$ marks$)$