Which grade of concrete is used in coastal areas?

Concrete in sea-water or exposed directly along the sea-coast shall be at least M 20 Grade in the case of plain concrete and M 30 in case of reinforced concrete. The use of slag or pozzolana cement is advantageous under such conditions.

Which cement is best for saltwater?

High alumina cement is used for structure constructed near sea water, because it shows resistant against salt content present in sea water. Also, it can with stand high temperatures. Low heat cement is used for mass concreting work such as dams, bridges etc.

What type of deep foundation is ideal for seaside structures?

Deeply embedded pile or column foundations are required for many coastal areas; in other coastal areas, they are recommended – instead of solid wall, crawlspace, slab, or other shallow foundations that can be undermined easily.

Which concrete grade is best for residential building?

OPC is the best for house construction in India. Generally, OPC 53 Grade cement is suitable for all RCC structures like footing, column, beam, and slabs, where ever initial and ultimate strength is the major structural requirement.

What is the maximum cement content for concrete as per IS 456 2000?

The maximum cement content in concrete in normal course is also limited to 450 kg. per cum of concrete as per Para 8.2. 4.2 of IS 456.

Which type of concrete is used in sea?

A Portland-fly ash cement such as Blue Circle Sulfacrete is a good choice for concrete in these circumstances (look for the designation CEM II/B-V +SR) as it get progressively more impermeable with time and has a greater chemical resistance to the chlorides present in sea water.

Can you pour concrete in salt water?

It is common knowledge that using salt water, sea water or salty sand is not a possibility when building concrete structures. The problem with using anything salty doesn’t lie with the concrete; the problem is with steel reinforcing. As steel rusts, it expands and breaks up the surrounding concrete.

What grade of concrete should be used under sea conditions?

Very Severe Exposure: Concrete surface exposed to sea water spray (intermittent contact with sea water) : Recommended grade of concrete is M35. Minimum nominal cover of 50mm is proposed. Extreme Exposure: Concrete surface in tidal zone: Recommended grade of concrete is M40. Minimum nominal cover of 75mm is proposed in this case.

What is severe exposure grade of concrete?

Severe Exposure: Concrete surface exposed to coastal environment (or continuously immersed in sea water) : Recommended grade of concrete is M30. Minimum nominal cover of 45mm is proposed in this case. Very Severe Exposure: Concrete surface exposed to sea water spray (intermittent contact with sea water) : Recommended grade of concrete is M35.

Which grade of concrete is used in concrete works?

Regular grades of concrete are M15, M20, M25, etc. For plain cement concrete works, generally, M15 is used. For reinforced concrete construction minimum M20 grade of concrete is used. For one cu m, calculate the cement, sand, and aggregate with 0.5 ratios of water for the following grades of concrete M10, M15, M20, M25, and M30. DRY VOLUME 1.54

What type of cement should I use for a concrete slab?

You can use combination of cements there, quick setting cement and sulphate resistant cement. They can either be used Individualy or in combination. Keep water to cement ratio less to increase durability of concrete.