Which rock is used as ballast for railway?

The stone to be used as railway ballast should be hard, tough nonporous and should not decompose when exposed to air and light. Igneous rocks like quartzite and granite forms the excellent ballast materials. When these are not available then lime stone and sand stone can also be used as good ballast material.

Which type of rock is used in railway track?

Track ballast is the collective term for the crushed stones on railway tracks. They form the trackbed and are packed around railway tracks. They form the ground for the railway sleepers which are used to keep the railway tracks upright and properly spaced.

Which of the following is the most used ballast on Indian railway?

Broken stone ballast
Which of the following is the most used ballast on Indian railways? Explanation: Broken stone ballast is the most used ballast on Indian railways. It is economical in the long run and can be used for high speed tracks.

What are the different types of ballast used in Indian Railways?

Types of Ballast Used in Railway Track

• Broken Stones : These are obtained from hard stones and it should be strong, hard, tough, durable and angular.
• Gravel Ballast :
• Ashes or Cinder :
• Sand :
• Kankur :

What is ballast stone?

Ballast stones were added or removed as the weight of cargo, supplies, or ordnance changed. Anchors and extra cannon were also sometimes used as ballast. Basalt. The most common rock type present in the ballast stones recovered from the Queen Anne’s Revenge shipwreck is basalt.

What is ballast used for?

Ballast is a mixture of sharp sand and small stones or gravel, used to make concrete for a variety of landscaping uses – from path edgings and shed bases to kerbs and securing fence posts. We also supply recycled ballast as part of our Eco-Range.

Why ballast is used in railway track?

Track ballast forms the trackbed upon which railroad ties (sleepers) are laid. It is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. Ballast also holds the track in place as the trains roll over it.

What is ballast in railway engineering?

Ballast is a granular material which is placed and packed below and around the railway sleepers. The main purpose of ballast is to transmit the load from sleepers to the formation(consolidated track bed) and to provide drainage facilities to the track.

Which type of ballast is commonly used in India?

Among above materials, broken stone from Igneous rocks like quartzite and granite forms the excellent ballast materials. When these are not available then lime stone and sand stone can also be used as good ballast material.

Which of the following is a type of ballast?

There are two lamp families that work with a ballast: fluorescent and HID. And there are two types of ballasts in each family: magnetic and electronic. Magnetic ballasts are the older ballast technology. For the fluorescent family, both T12 linear fluorescents and two-pin CFLs use magnetic ballasts.

When were ballast stones used?

Our research shows that stone ballast was extremely important to all sailing ships from the 1600s to the 1800s.

What is a ballast used for?

ballast – A device required by electric-discharge light sources such as fluorescent or HID lamps to regulate voltage and current supplied to the lamp during start and throughout operation.