Concrete - 25-30mpa (market for concrete - 25-30MPa)

Emissions generated by the activity within the product supply chain as described in ecoinvent v3.8. Ready Mixed concrete will be made from a mix of cement, aggregates and water. Aggregates make up the majority of the concrete’s volume and the cement provides resistance. Additives will be incorporated into the mix to ensure particular properties such as improved durability or shortened hardening times. In the designation of concrete mix M refers to the mix and the number to the specified compressive strength of 150 mm size cube at 28 days, expressed in N/mm2. The determination of the proportion of cement, aggregate and water to attain the required strength shall be made as follows: (a) By designing the concrete mix: such concrete shall be called ‘Design mix concrete’, for details reference may be made to RCC Chapter. (b) By adopting nominal concrete mix: such concrete shall be called ‘Nominal mix concrete’. Design mix concrete is preferred to nominal mix. If design mix concrete cannot be used for any reason on the work for grades of M20 or lower, nominal mixes may be used with the permission of Engineer-in-Charge, which, however, is likely to involve a higher cement content. The Ready Mixed Concrete will be immediately transported to specified construction site in the radius of 50 to 75 km of proposed RMC unit by concrete mix tankers having rotating drums which will rotate at a speed of two to six rotations per minutes during transportation to maintain the quality of ready mixed concrete." The cut-off classification is allocatable product. The activity type is market activity. The reference product amount is 1.