Curing & Protection
Concrete shall be protected from premature drying and excessively hot temperatures for at least 28 days from the date of casting. The concrete surface shall be kept continuously wet by application of water for at least 7 days to maintain constant temperature. The watering of concrete shall continue until the concrete has achieved its designed strength. Where the temperature is excessively high the surface of concrete shall be covered with absorptive mat, fabric or sand continuously kept wet or the application of other moisture retaining covering as approved by the Engineer.
Where the surface of concrete is covered with formwork, the surface of the form shall be wetted until removed.
0315 Methods of Measurement
03151 Insitu concrete work shall be understood as including gauging, mixing, casting in place, construction joints tamping of horizontal surfaces and curing.
03152 Differentiation shall be made for: -
Plain & reinforced concrete
Below and above grade work
Classes of concrete
Foundation
Columns
Ground & suspended beams & lintels
Ground & suspended solid & ribbed slabs.
Walls
Steps, staircases and landings
Mass in-fillings.
Grouting & filling to holes.
Other concrete works.
03153 Measurement
Cast in place concrete shall be measured by volume except for the following: -
Ribbed slabs measured by area stating thickness.
Grouting and filling to holes shall be enumerated stating sizes.
03154 Deduction
No deduction shall be made for voids up to 0.25m2 in area.
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