SPECIAL MORTAR Flashcards
What are some types of special mortars?
Fire-resistant mortar
Lightweight mortar
Packing mortar
Sound-absorbing mortar
X-ray shielding mortar
What is Fire Resistant Mortar?
Fire-resistant mortar is prepared by adding aluminous cement with finely crushed powder of fire bricks in the ratio 1:2.
Where is Fire Resistant Mortar used?
It is used for lining furnaces, fireplaces, ovens, etc.
What is Light Weight Mortar?
Light weight mortar is prepared by adding materials such as sawdust or wood powder to lime or cement mortar.
Where is Light Weight Mortar used?
It is used in sound-proof and heat-proof construction.
What is Packing Mortar used for?
Packing mortar is used for packing or sealing oil wells.
What are the properties of Packing Mortar?
It has high homogeneity, water resistance, predetermined setting time, substantial strength, and resistance to subsoil water pressure.
What are the varieties of Packing Mortars?
Cement-sand, cement-loam, and cement-sand-loam mortars.
: What is the purpose of Sound Absorbing Mortar?
It is used to reduce noise levels by forming sound-absorbing plaster.
What is the bulk density range of Sound Absorbing Mortar?
The bulk density varies from 6 to 12 kN/m³.
What materials are used as binding agents in Sound Absorbing Mortar?
Portland cement, lime, gypsum, slag, etc.
What type of aggregates are used in Sound Absorbing Mortar?
Lightweight porous materials such as pumice and cinders.
What is X-ray Shielding Mortar used for?
It is used for plastering walls and ceilings of x-ray cabins to provide protection against the ill effects of x-rays.
What is the bulk density of X-ray Shielding Mortar?
The bulk density is over 2200 kg/m³.
What aggregates are used in X-ray Shielding Mortar?
Aggregates are obtained from heavy rocks, and suitable admixtures are added to enhance protective properties.
admixtures cadmium ,lithium,h2,
