What are grades of concrete?
Table of Contents
What are grades of concrete?
Different types of concrete grades and their uses
| Concrete Grade | Mix Ratio (cement : sand : aggregates) | Compressive Strength |
|---|---|---|
| M7.5 | 1 : 4 : 8 | 1087 psi |
| M10 | 1 : 3 : 6 | 1450 psi |
| M15 | 1 : 2 : 4 | 2175 psi |
| M20 | 1 : 1.5 : 3 | 2900 psi |
What is grading in concrete technology?
Grade of concrete denotes its strength required for construction. For example, M30 grade signifies that compressive strength required for construction is 30MPa. Regular grades of concrete are M15, M20, M25 etc. For plain cement concrete works, generally M15 is used.
Which grade is used for slabs?
Generally M10 and M15 grades of concrete are used for leveling course, and bedding for footings. Standard concrete and concrete of grade M20 is applicable for Reinforced Cement Concrete (RCC) works for slabs, beams, columns and so on. The high strength concrete has its applications for high rise buildings.
What is M35 concrete?
M35 means compressive strength of concrete after 28 days of curing is 35 MPA. The strength can be checked by cube test. Approximately 80 percent strength is achieved after 28 days.
What does the M in M40 stand for?
Share | Responses. raj. IS 456-2000 has designated the concrete mixes into a number of grades as M10, M15, M20, M25, M30, M35 and M40. In this designation the letter M refers to the mix and the number to the specified 28 day cube strength of mix in N/mm2.
What concrete grade is used for slabs?
M-40 grade is used for Pre-stressed concrete work, slabs, beams, column, footing etc. M-45, M-50 grades are used for RCC, Runways, Concrete Roads( POQ ) Prestressed concrete girders, RCC columns, Prestressed beams etc. M-55 grade is used for Pre-stressed concrete girders and piers etc.
What is the highest grade of concrete that is used?
For small scale constructions; normal grade concretes like M15, M20 & M25 are used. For large scale constructions; standard-grade & high-grade concrete like M40, M45, M50, etc are used.
What are the grades of concrete?
Grades Of Concrete: In IS: 456-1978, the different grades of concrete are given as M10, M25, M20, M25, M30, M35, and M40. In the classification of concrete mix, the letter M denotes the Mix and the numbers 10, 15, 20, 25, 30, 35, 40 represent the predetermined works cube strength of 15 cm cubes after curing of 28 days in N/mm2.
What is the minimum strength of different grades of concrete?
Concrete Grades. Concrete grades defines as a minimums strength of the concrete it must possess after the 28th days of constructions with properly control quality.
What is grade cement used in building construction?
– LEAN CONCRETE. Lean concrete is a mix where the amount of cement is lower than the amount of liquid present in the strata. – ORDINARY GRADE OF CONCRETE. Application/use:- It can be used in construction of Levelling course, bedding for footing, concrete roads, etc. – STANDARD GRADE OF CONCRETE. – HIGH STRENGTH CONCRETE GRADES.