Design two (2) suitable concrete mixes to meet the three (3) requirements (i. e., minimum slump, maximum internal temperature and characteristic strength). For one concrete mix (i. e., mix 1), the binder must comprise fly ash and cement and for the other concrete mix (i. e., mix 2) the binder must comprise ground granulated blast furnace slag and cement. For each concrete mix (i .e, mixes 1 and 2), give the proportions of concrete making materials required to produce the concrete (per m3). Question 2 Explain the differences that exist in the heat of hydration behaviour between the two (2) concrete mixes designed in Question 1. From these two (2) concrete mixes, select a single concrete mix to use in the project. Justify your reasons for making this selection. Question 3 An option of using self‐compacting concrete (SCC) for the project has been proposed. Describe how the concrete mix selected in Question 2 can be modified to meet the requirements of a SCC mix. Design a suitable SCC mix to meet the three (3) requirements (i. e., minimum slump, maximum internal temperature and characteristic strength). For this SCC mix, give the proportions of concrete making materials required to produce the concrete (per m3). Question 4 If the freeway is to be constructed in an environment running parallel to the seacoast, and within 50 m of the seacoast, describe the concrete mix design considerations that need to be taken into account to ensure durability against chloride‐induced corrosion is met.