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(a) Concretes are sometimes placed in environments where they are in contact with solutions of sulfates. Discuss three ways that the sulfate resistance of the concrete may be improved.
(b) Discuss the good work practices that should be employed in relation to the delivery and storage of cement, both in bags and bulk deliveries.
(c) List three types of admixtures used in concrete and discuss why they are used, and how they modify the properties of the fresh concrete and in some cases the hardened concrete.
(d) Discuss the properties of CEM I R 52.5 and outline two situations where you would recommend the use of this cement in concrete.