The durability of concrete is its ability to resist weathering action, chemical attack, abrasion, or any process of deterioration.
The strength of concrete is the ability of the concrete to withstand pressure or force.
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The compressive strength of M25 concrete at 7 days will be between 6-7.5 N/mm2 .
The main difference between concrete grade C35 and C35A lies in their composition. C35 concrete is a standard concrete mix with a minimum strength of 35 megapascals (MPa), while C35A concrete is a special mix that includes air-entraining agents to improve workability and durability. The inclusion of air-entraining agents in C35A helps to increase the concrete's resistance to freeze-thaw cycles and reduce the risk of cracking. Overall, C35A is more suitable for applications where improved durability and workability are required.
mortar are mixing by sand & cement and concrete is mixing by cement, sand & stone
Cement mortar is a mixture of cement, fine aggregate and water.Concrete is a mixture of cement, fine aggregate, coarse aggregate and water.Generally, concrete have higher strength than cement mortar.
f ′c: concrete compressive strength at 28 days (compression is negative) fcu: concrete crushing strength (compression is negative)