Crushing strength of a good stone should be more than
Crushing strenght > 100 MPa or 1000 Kg/M2 Wear and tear less than 3% Sp Gravity > 2.7 Water absorption not more than 5% Toughness index 13-19
Specific gravity for most of the building stone lies between
Spalling hammer is used for
Cross cut saw is used for
Out of the following which may be termed as unstratified rock
Stratified rocks- sandstone limestone slate. Unstratified rock- granite marble trap. Foliated rock- Metamorphic soil
Chemically marble is known as
Plaster of paris is obtained by calcining of
CaSO4.2H2O to 2CaSO4.H2O
Rock having Alumina or clay as their major constituent are called
Argillaceous - Slate, laterite
Hardness of the rock can be tested in situ using
Schmidth hammer test is used to determine compressive strength of concrete & stones. Smith test is used for finding presence of soluble matter in a stone in test tube full of clean water. Acid test used to investigate how much atmospheric action can be registed by stone. Crystallization is used to determine the durability of stone.
Basalt stone is by nature
Basalt is coolen part of Lava (Extrusive), Above the earth surface.
The natural bedding plane of stone and the direction of pressure in stone masonry is
Which of the following stone is suitable for damp proofing
Slate is used for moisture control
Pegmatite is an example of
Pegmatite is molten state of magma(Intrusive)
Solidification of molten magma when it reaches the surface of earth result in the formation of
Granite is intrusive magma formed rock. Basalt is extrusive Lava formed rock.
Which of the following is the main composition of granite
On which of the following Factor The crushing strength of stone does not depend
In stone masonry stones are so placed that the direction of pressure to the plane of bedding is
Rock formed due to alteration of original structure due to heat and excessive pressure are called
Metamorphic rock is formed due to heat and excessive pressure for long time
The lightweight aggregate are obtained from
The process of production of Natural stone is known as
Dressing is the process of surface smoothen. Quarring is process extracting natural stones. Seasoning is drying of stones