Which grade of concrete is used for water retaining structures?

Minimum grade of concrete for the R.C.C water tank is M30. Maximum cement content is 400 kg/m3 to take care of shrinkage effect.

Is code for water retaining structures?

The requirements applicable specifically to reinforced concrete and prestressed concrete liquid retaining structures are covered in IS 3370 (Part 2), and IS 3370 (Part 3) respectively.

What are the water retaining structures?

The retaining structures used to build reservoirs are called dams and dikes. A dam is built on the riverbed; it serves to hold back water and raise the water level of the resulting reservoir.

Is 3370 2009 Part I used for design of water tank?

IS:3370-2009 recommends the use of Limit State Design method for designing water storing tanks with some specified precautions. It adopts the criteria for limiting crack width. This is done by considering ultimate limit state and restricting the stresses to 130 MPa in steel so that cracking width is not exceeded.

What is concrete grade 35A?

The 35A concrete grade is used for the water retaining structures which is expected to have a high durability while keeping the strength as Grade 35.

What is the minimum grade of concrete for RCC?

ans. The minimum grade of concrete used for RCC is M20, with ratio 1:1.5:3 means 1 part of cement, 1.5 part of fine aggregate (sand) and 3 part of coarse aggregate.

What is retaining structure?

The structure used to retain or support the material/soil is called retaining structure. e,g retaining walls, which may be of RCC, brick or stone masonry or sheet piling etc.

Is 3370 revised?

All four parts of IS 3370 are revised. A new part to deal with construction practices, quality management and maintenance is required. Part 3 for prestressed LRC, is revised specifying limit state design, working stress design deleted and it is in line with IS 1343.

What is C28 35 concrete?

C28/35. This is possibly the most commonly used concrete mix that Beatson’s Concrete supply. C28/35 covers a wide range of domestic and commercial applications. Ideal for: Reinforced house foundations, foundations for retaining walls, agricultural storage areas, driveways and garage floor slabs.

Is C35 concrete waterproof?

Very good (well made as well as well placed on site without adding water) C35 possibly for 60 years, a waterproof concrete indefinitely. The other chemicals that attack the concrete do so at the surface. These are mainly sulphate in aggresive ground and sea water and carbon dioxide.

What grade of concrete is used for a water retaining structure?

The 35A concrete grade is used for the water retaining structures which is expected to have a high durability while keeping the strength as Grade 35. Locations of construction joints are facilitating path for water penetration. Minimizing the construction joints is an important consideration for water retaining structures.

What is a Grade C35A cement?

This variation in constituent material limitations gave rise to the class grade C35A, where A stood for aqueous. The Code also specified maximum cement contents for reinforced concrete of 400kg/m 3 for ordinary Portland cement or cements containing ggbs, or 450kg/m 3 for cements containing fly ash.

What is the maximum crack width of a concrete retaining wall?

So that concrete will become watertight within few days while exposed to water. Therefore, in case of the water retaining structures, the maximum crack width is limited to 0.2mm to achieve the water tightness by self-healing or 0.1mm if the appearance is the matter in the design procedure.

What is the water tightness of concrete?

Concrete for water retaining structures must have low permeability. Water tightness is referred to the ability of concrete to hold back or retain water without visible leakage (Kosmatka et al, 2003).