Table of Contents

## Types of Concrete Grade and their uses

**Concrete – **Concrete is a mixture of Cement + Sand + Aggregates + Water & admixtures.

A correct Proportion & mixing ratio of all these ingredients defines the durability & life of a produced concrete. Concrete Strength is directly proportional to the water-cement ratio it means The more water you use in concrete it will become less strong. The less water you use in the concrete the stronger the concrete will be.

So, on the basis of the water-cement ratio IS Code- 456:2000 has divided the concrete mix ratio into three categories.

**Types of Concrete Mixes**

As Per IS Code 456-2000 there are three types of Concrete Mix Ratio.

i). Nominal Concrete Mix Ratios.

ii). Standard Concrete Mix Ratios.

iii). High Strength Concrete Mix Ratios.

Before going ahead let us know, the difference between these three concrete grade mix ratios so that it will be easy for us to decide the correct mix grades for different structural members.

**i). Nominal Concrete Mix Ratios.**

It is also called lean concrete. The grades M5, M7.5, M10, M15, or M20 come under the nominal concrete mix ratio.

**ii). Standard Concrete Mix Ratios.**

The grades M25, M30, M35, M40, or M45 come under the Standard concrete mix ratio.

**iii). High Strength Concrete Mix Ratios.**

The grades M50, M55, M60, M65, or M70 come under the High Strength concrete mix ratio.

M means Mix Ratio & number denotes the compressive strength of concrete ratio after 28 days.

**USES OF DIFFERENT TYPES OF CONCRETE MIX**

**i). Nominal Concrete Mix Ratios.- (M5, M7.5, M10, M15, M20).**

M5 – Mix ratio is 1:5:10 (1 Cement, 5 Sand, and 10 Aggregate).

M7.5 – Mix ratio is 1:4:8 (1 Cement, 4 Sand, and 8 Aggregate).

**Uses & Application:-**

PCC (Plain cement concrete) work such as Levelling course, bedding for footing, etc.

**M10 – **Mix ratio is 1:3:6 (1 Cement, 3 Sand, and 6 Aggregate).

**Uses & Application:-**

Construction of Leveling course, bedding for footing, concrete roads, Patio slabs, Pathways, Non-structural work, etc.

**M15 – **Mix ratio is 1:2:4 (1 Cement, 2 Sand, and 4 Aggregate).

**Uses & Application:-**

Work such as the construction of Levelling course, bedding for footing, concrete roads, Pavement curbs, Floor blinding, etc.

**M20 –** Mix ratio is 1:1.5:3 (1 Cement, 1.5 Sand, and 3 Aggregate).

**Uses & Application:-**

M20 is used for RCC (Reinforced Cement Concrete) for domestic buildings. Used For Slabs, beams, columns, Footings & Foundations of houses.

**ii). Standard Concrete Mix Ratios. – (M25, M30, M35, M40, M45).**

**M25 –** Mix ratio is 1:1:2 (1 Cement, 1 Sand and 2 Aggregate).

**Uses & Application:-**

M25 is used for RCC (Reinforced Cement Concrete) used in the construction of slabs, beams, columns & all types of footing & foundation, etc.

It is a multipurpose concrete mix used in almost all construction areas, For domestic as well as commercial purposes.

**M30 –** The mix ratio is based on the design mix.

**Uses & Application:-**

M30 is used as RCC (Reinforced Cement Concrete) mostly used for Pathway & Roadways. More durable than the other grades.

This is the first lowest grade of concrete used in the construction of roads and pathways. It is more durable & weather resistant than all other grades. It can easily resist heavy traffic loads and heavy structural loads.

**M35 –** The mix ratio is based on the design mix.

**Uses & Application:-**

M35 is used as RCC (Reinforced Cement Concrete) used for Commercial structures, Creating external walls and slabs & Structural piling.

**M40 –** The mix ratio is based on the design mix.

**Uses & Application:-**

M40 is used as RCC (Reinforced Cement Concrete) Specially used for Pre-stressed concrete, slabs, beams, columns, footings, or in septic tanks, etc.

M40 grade is used for commercial construction sites for structural support of beam & foundation. It can withstand any chemical corrosion & especially prefered for the structures which affect with chemicals like septic tanks etc.

**M45 & M50 –** The mix ratio is based on the design mix.

**Uses & Application:-**

M40 is used as RCC (Reinforced Cement Concrete) Specially used for Runways, Concrete Roads (PQC), Prestressed Concrete Girders, RCC Columns, Prestressed beams, etc.

**iii). High Strength Concrete Mix Ratios – (M50, M55, M60, M65, M70).**

**M55 –** The mix ratio is based on the design mix.

**Uses & Application:-**

M55 is used as RCC (Reinforced Cement Concrete) in an aggressive environment Specially used Pre-stressed concrete girders and piers etc.

**M55 to M80 –** The mix ratio is based on the design mix.

**Uses & Application:-**

Especially used for high rise buildings, long-span bridges, dams & coastal construction areas where a very high compressive strength is required.

Bar Bending Schedule (BBS) Basics Part -1

This Ebook is specially designed for Freshers Civil Engineers. Recommended for Quantity Surveyors & Billing Engineers. Here You Can Learn All Basic Concept & Formulas for Bar Bending Schedule (BBS).

I earnestly hope that this article has been both meaningful and useful to you.

If you like this article then please share it with your friends & also like our Facebook Page and join our Telegram Channel.

If you want a PDF copy of this, Do let’s know by commenting & you can message us on our Instagram & telegram channel, or you can download it from the top Right-hand corner of this post.

Thanks For the Great Attention!

**Good Bye & Take Care**

**Happy Learning **

**Also Read:-**

20 Interview Questions and Answers For Civil Engineers

15-technical-terms-about-reinforcement

Construction Cost of 500Sqft House in India in 2021 (G+1)