The following are the proposed mix proportions to produce concrete per 50kg cement and arrive at the required strength. It is the responsibility of the contractor to produce the appropriate mix design using the proposed proportion or trial mixes and tests to achieve the required strength.
Concrete containing less cement than that prescribed below may be used if it is established by tests that the required compressive strength is achieved and demonstrated that the concrete produces required finishing properties, durability and surface hardness. The reduction of cement content shall require the specific approval of the Engineer.
