## What Is the **Specific Gravity of Cement**

**The specific gravity of cement **is defined as the **mass of cement** of a specified volume to the **mass of water **of the same** volume of cement. **

It can also be **defined **as the **density of cement** to the **density of water **for the **same volume.**

In both, the **definitions of **the volume of **cement **must be the same. If the **volume **does not **remain **the same then the **specific gravity value** may be **accurate**.

Because the mass and **density **of **cement **and **water **are liable to **change** with **respect **to their **volume**.

**Specific gravity** is the **comparison **of the mass or density of any **substance **with the mass or density of the **standard substance**. Generally, water is **considered **the **standard substance**.

The best **method **to determine the **specific gravity of cement** is by using a liquid such as **water-free kerosene**, which does not **react **with cement.

For conducting this test, a **standard Le Chatelier specific gravity flask** or **specific gravity **bottle may be **employed**.

The Le Chatelier specific gravity **flask **is also utilized to **determine **the s**pecific gravity of dust, sand, and other fine materials.**

This **specific gravity **of cement is an **essential** parameter in **concrete mix design** material **quantity **calculations.

This **specific gravity of portland cement is about 3.15** and can be **measured **using **ASTM C188.**

**Read More:** **Initial And Final Setting Time Of Cement Test, Procedure & Result**

## Different Tests of Cement

**The following tests are conducted on cement,**

**Fineness Test of Cement****Consistency Test of Cement****Setting Time Test of Cement****Soundness Test of Cement****The Heat of Hydration Test****Specific Gravity Test of Cement****Tensile Strength Test****Chemical Composition Test**

## Use of Cement Specific Gravity

The** specific gravity value **of any **substance** gives the idea of how heavy or light is the **substance compared** to the **standard substance**. From the **value**, we can **judge **whether it will **float **or **sink **into another **substance**.

All-**natural material **and substance have their** own specific gravity **value.** **It** **generally **ranges from 1 to 100. **

Water has a **specific** **gravity **of** around** 1and If the specific gravity of **other material **is greater than 1, then it **sinks **in water.

If the** specific gravity** of the material is** less than 1 **it floats in water. Therefore, the **specific** **gravity **of any material is an **important **property to **know**. So that we can use it in a **proper way**.

Generally, the **specific gravity of cement ranges from 3.1 to 3.16 g/cc.** From this, we can say that the **specific gravity **of cement is** more than **the specific gravity of **water **is 1.

It means **cement **will sink in **water **if we put it in the water. Also, we can say that **cement **is **heavier **than **water**.

**Cement particle **has pore in them and they can **absorb moisture **from the **atmosphere**. Considering this **behavior **of cement particles the** specific gravity** can either **increase or decrease**.

While we are **calculating cement **for mix design we **consider **the **specific gravity of cement as standard 3.14.**

So, any change in** cement-specific gravity** will affect the **mix design.** Hence, it is **essential **to test the **specific gravity** of the cement **procured **before the **mixing process**.

This is the **main reason **behind we** reject the old stored cement. **Old cement has more **liable **to store **external moisture **which results in **increased specific gravity** of cement.

**Read More: Consistency Test Of Cement Test, Calculation & Result**

## Specific Gravity of Cement Test

**IS code for the Specific gravity test is IS 2720- Part 3**

**Apparatus**

**The following apparatus is used in specific gravity tests of cement,**

**Le Chaterlier”s flask****Weighing balance****Kerosene (free from water).**

**Specific Gravity of Cement Procedure**

**Clean**the**Lechatlier**flask before use. It should be free from**moisture**.- Now, Take the
**weight**of the**empty**flask as**W1.** - Take
**around**50 gm of**cement**and fill in the**flask**. - Fix the
**stopper**on the flask and**weigh**the flask with cement as W2. - Now fill the
**kerosene**in the**flask up**to the neck of the**bottle**. - Thoroughly
**mix cement**and kerosene in the flask taking care no air bubble is left in it.**Record**this weight as**W3**. - Empty the flask and
**clean**it. Now fill the**kerosene**in it up to the**neck**of the bottle and**record**the**weight**as**W4**.

**Read More: Fineness Test Of Cement Procedure And Importance**

### Observations and Calculations

**The specific gravity of the cement formula is as follows,**

**= (W2 – W1) / ((W2 – W1) – (W3 – W4) X 0.79)**

Where,

**W1 = Weight of Empty Flask.**

**W2 = Weight of Flask + Cement.**

**W3 = Weight of Flask + Cement + Kerosene.**

**W4 = Weight of Flask + Kerosene.**

**Here, the specific gravity of kerosene is 0.79g/cc**

**Note:**

**Conduct tests at least 3 times for accurate results.**

**Clean the flask before using it again.**

### Result

**The specific gravity of a sample of cement = 3.15**

**Read More: Fineness Test Of Cement Procedure And Importance**

## Why is Kerosene used for the Specific Gravity Test of Cement?

If we use **water instead **of kerosene, **water **will mix with **cement **and make a **paste**. As we know when cement is mixed with water, **cement** **starts **its heat of the **hydration process. **So, **water **can’t be used for **cement-specific gravity tests**.

**Kerosene** is a very **well-known polar liquid** so it will not react with **cement **while doing the test. The **specific gravity **of kerosene is **0.79g/cc.**

## FAQs:

### What Is the Specific Gravity of Cement?

The specific gravity of cement is defined as the mass of cement of a specified volume to the mass of water of the same volume of cement. OPC cement has a specific gravity of 3.15.

### How do you calculate the specific gravity of cement?

1. Clean the Lechatlier flask before use. It should be free from moisture.

2. Now, Take the weight of the empty flask as W1.

3. Take around 50 gm of cement and fill in the flask.

4. Fix the stopper on the flask and weigh the flask with cement as W2.

5. Now fill the kerosene in the flask up to the neck of the bottle.

6. Thoroughly mix cement and kerosene in the flask taking care of no air bubbles left in it. Record this weight as W3.

7. Empty the flask and clean it. Now fill the kerosene in it up to the neck of the bottle and record the weight as **W4**.

### Why specific gravity test is done?

The specific gravity value of any substance gives the idea of how heavy or light is the substance compared to the standard substance. From the value, we can judge whether it will float or sink into another substance.

### What is the Standard-Specific Gravity of Cement?

Generally, the **specific gravity of cement ranges from 3.1 to 3.16 g/cc.**

### What is the use of specific gravity of cement?

Cement particle has pore in them and they can absorb moisture from the atmosphere. Considering this behavior of cement particles the specific gravity can either increase or decrease. While we are calculating cement for mix design we consider the specific gravity of cement as standard 3.14. So, any change in cement-specific gravity will affect the mix design. Hence, it is essential to test the specific gravity of the cement procured before the mixing process.

### What is the Specific Gravity of Kerosine?

The specific gravity of kerosene is 0.79g/cc.

### Specific Gravity of Cement

**Specific gravity** is defined as the **mass of cement** of a specified **volume to the mass of water** of the same volume of cement. The **specific gravity of cement** ranges from 3.1 to 3.16 g/cc.

### sp. gravity of cement

3.15 g/cc

Limit: **Specific gravity of cement** = 3.15 g/cc.

### Specific Gravity of OPC

The **OPC** cement specific gravity is 3.1 to 3.16 g/cc which means cement is heavier than water of the same volume and it sinks in water.

### Specific Gravity of Cement IS Code

IS **code** for the **Specific gravity** test of cement is IS 2720- Part 3

### Specific Gravity of PPC Cement

3.08 gr/cm3

As per the study, the specific gravity of PPC is found to be 3.06 to 3.08 gr/cm3

### Specific Gravity of Concrete

**The specific gravity of cement **is defined as the **mass of cement** of a specified volume to the **mass of water of the same volume of cement. **It can also be defined** as the density of cement to the density of water for the same volume.** The **specific gravity of cement** ranges from 3.1 to 3.16 g/cc

## Watch Video: Specific Gravity Test of Cement

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