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**What Is Water Cement Ratio**?

It Is the ratio of the **mass of water** to the** mass of cement** added to concrete. The **Watercement Ratio **directly affects the **strength of the concrete mix.** The **typical w/c ratio** for different grades of concrete varies between** 0.40 to 0.60.**

## Importance of Watercement Ratio

In concrete, the most important ingredient that influences that property of concrete is **cement and water.**

In concrete, the **ratio of the weight of water to the weight of cement is called the water to cement ratio (w/c). **The cement and water are the two main ingredients responsible for binding everything together.

The **water-cement ratio** is the ultimate factor for the strength and durability of the concrete when it is cured properly.

For example, if the W/C ratio is **0.40 that’s meant for every 100 lbs of cement** used in the concrete, **40 lbs of water** is added.

**What Happens? If You Add Too Much Water**

**Adding too much water** to concrete can result in shrinkage, cracking, and reduced overall strength. **Excessive water** makes loose concrete difficult to handle, leads to segregation and bleeding problems in concrete.

**Read More:** **Grade Of Concrete – Their Ratio, Uses & Suitability**

** What Happens? If You Add Less Water**

However, **without enough water**, it will make concrete to stiff, difficult to fill and compact and it can also result in honeycombing in concrete. it increases the labor effort to move the concrete.

**How to calculate the proper amount of water required for concrete?**

With the proper water-cement ratio concrete becomes **more durability, porosity, and color will be balanced.**

Recommended Water cement ratio for concrete,

- For ordinary concrete work (sidewalks and driveways):
**0.6 to 0.7** - If required higher quality concrete is desired:
**0.4**

The practical best water-cement ratio is from about **0.40 to over 0.60.**

- A ratio of 0.3 is made concrete too stiff (unless superplasticizers are used).
- A ratio of 0.8 makes concrete wet and fairly weak concrete.

Normal compressive strengths when concrete is properly cured are:

**0.4 w/c ratio –> 5600 psi****0.8 w/c ratio –> 2000 psi.**

## Water-Cement Ratio Table

The following table indicate the water cement ratio for different grades of concrete as per exposure condition,

**Water Cement Ratio Formula**

The **formula** of** water cement ratio calculatio**n is **water/cement**. In simple words, **water quantity** is divided by **cement quantity **and result of calculation gives the **w/c** ratio.

It can be also calculated from **Water Cement Ratio IS 10262 (2009) Code Chart**

**Water Cement Ratio Calculation**

For example, if the water-cement ratio is 0.50 for concrete and cement is added is about 50 kg (weight of 1 bag of cement)

Water required for concrete will be,

Water/ cement = 0.50

Water / 50 kg = 0.50

Water = 0.50 x 50

**Water = 25 liters = 6.60 gallon**

Similarly for W/C = 0.40

Water = 0.40 x 50

**Water = 20 liters = 5.28 gallon**

As you see that there is water reduced as we decrease the water-cement ratio. It is a fact that water reduced in concrete increases its strength. But there is some **limit to the water-cement ratio. **The minimum water-cement ratio is **0.30 to 0.35**, beyond this concrete becomes too stiff and impractical to handle.

## FAQs: Water Cement Ratio

**Water Cement Ratio**

It Is the ratio of the **mass of water** to the** mass of cement** added to concrete. The **water cement ratio **directly affects the **strength of the concrete mix.** The **typical w/c ratio** for different grades of concrete varies between** 0.40 to 0.60.**

### How to Calculate Water Cement Ratio

For example, if the w/c** ratio is 0.50** for concrete and cement is added is about 50 kg (weight of **1 bag of cement)**

Water required for concrete will be,**Water/ cement = 0.50**

Water = 0.50 x 50**Water = 25 liters = 6.60 gallon**

### Cement Water Ratio

Water Cement Ration is the ratio of the **mass of water** to the** mass of cement** added to concrete. The **w/c** **ratio **directly affects the **strength of the concrete mix.** The **typical water cement ratio** for different grades of concrete varies between** 0.40 to 0.60.**

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