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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 the** 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). **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** are 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, leading 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 durable, **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 make**s 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 indicates the water-cement ratio for different grades of concrete as per exposure condition,**

**Water Cement Ratio Formula**

The **formula** for** water cement ratio **calculation is **water/cement**. In simple words, **water quantity** is divided by **cement quantity **and a result of the **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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