M25 Rcc Ratio

Maximum nominal aggregate size.

M25 rcc ratio. Standard grades of concrete. For making concrete we use cement sand aggregate and water which are mixed with certain ratio and concrete is cast and put in a cube of 150 mm size and put in a water bath for 28 days and afterward it is tested in a compression test. Concrete mix design calculation. The compressive stress result is known as grade of concrete.

Its compressive. The minimum grade of concrete for plain cement concrete pcc is m15 the minimum grade of concrete for reinforced cement concrete rcc is m20 concrete grade and mix ratio table as per is 456 2000 the grades less than m20 should not be used in rcc works. M25 grade mixing ratio is 1 1 2 1cement part. F target f ck 1 65 x s 25 1 65 x 4 0 31 6 n mm 2.

Maximum water cement ratio mort h 1700 3 a 0 45. Answer brajesh kaurav. Used for construction of slabs beams columns etc. Durability criteria as per exposure conditions already discussed by other writers for rcc with moderate exposure conditions m25 is the minimum grade of concrete and 0 50 is the maximum water cement ratio.

Mixing ratio is 1 1 5 3 1cement part. Workability mort h 1700 4 50 75 mm slump 7. Where s standard deviation in n mm 2 4 as per table 1 of is 10262 2009. In this case standard deviation is taken from is 456 against m 20 is 4 0.

Used as reinforced cement concrete rcc. Its compressive strength is 20 mpa. There are two aspects of water cement ratio. M20 m25 m30 m40 grade concrete concrete mix design is a procedure of selecting the suitable ingredients of concrete and their relative proportions with an objective to prepare concrete of certain minimum strength desired workability and durability as economically value engineered as possible.

For m 20 the ratio should be 1 1 5 3. For pcc with extreme exposure condition m25 is the minimum grade of concrete and 0 40 is the maximum water cement ratio. 1 sand part 2aggregate part. It is expressed in n mm.

For m 30 and more than m 30 grade concrete you have to design it using laboratory data of materials. Procedure for concrete mix design of m25 concrete step 1 determination of target strength. Opc 53 grade confirming to is 12269 1987. Minimum cement content mort h 1700 3 a 310 kg m 3.

Ratio of m10 1 3 6 m15 1 2 4 m20 1 1 5 3 that rattio is nominal mix basis above m20 than mix design is preford basically m25 consider is 1 1 2.