Tests on limestones, Civil Engineering

Assignment Help:

Tests on Limestones

Practical tests are made on lime stones to decide their suitability is following:

    i.       Physical tests

   ii.        Heat test

   iii.       Chemical test

   iv.       Ball test.

(i) Physical Test: Pure limestone is white color stone. Hydraulic lime stones are brown, bluish grey or it has dark colors. The hydraulic lime gives out earthy smell. They are having clayey taste. Presence of lumps gives indication of quick lime and unburnt lime stones.

(ii) Heat Test: A piece of dry stone which weigh is W1 is heated in an open fire for few hours. If weight of sample stone after cooling is W2, the loss of weight is W2 - W1. The loss of weight shows the amount of carbon dioxide. From this the amount of calcium carbonate in limestone may be worked out.

(iii) Chemical Test: A teaspoon with full of lime is placed in a test tube and dilute hydrochloric acid is poured in it. Content is stirred and test tube is kept in the stand for 24 hours. Vigorous effervescence and less residue show pure limestone. If effervescence is less and its residue is more it shows impure limestone.

If thick gel is formed and after test tube is held upside down it is possible to recognize class of lime as shown below:

  • Class A lime, if gel do not flow.
  • Class B lime, if gel tends to flow down.
  • Class C lime, if there is no gel formation.

(iv) Ball Test: This test is conducted to recognize whether the lime belongs to class C or to class B. By adding adequate water approximate 40 mm size lime balls are building and they are left undisturbed for 6 hours. Then the balls are placed in a basin of water. If within minute's slow expansion and slow disintegration begin it indicates class C lime. If there is little or no expansion, but just cracks appear it belongs to class B lime.


Related Discussions:- Tests on limestones

Function of reinforced concrete infill, Function of reinforced concrete inf...

Function of reinforced concrete infill in marine piling system of steel tubular pile with reinforced concrete infill Reinforced concrete is designed to fill void space inside

Energy absorbed in heeling during vessel berthing, Q. Energy absorbed in he...

Q. Energy absorbed in heeling during vessel berthing? When a vessel   berths on a fender system at a pier, point of contact of berthing ship can be below or above the centre of

Foundation, Explain briefly shallow foundation?

Explain briefly shallow foundation?

Timber, uses of timber in civil engineering field and its physical state an...

uses of timber in civil engineering field and its physical state and chemical formula or symbol?

Reason of skin reinforcement for deep beams, Question What is reason of sk...

Question What is reason of skin reinforcement for deep beams ? Answer In BS8110, it declares that secondary reinforcement have to be provided for beams greater than 750mm deep

Illustrate weld failures in track, Q. Illustrate Weld Failures in Track? ...

Q. Illustrate Weld Failures in Track? These are failures occurring to defects in welding the joint. These defects are either because of improper composition of thermit metal or

Define the planning an underwater inspection, Define the Planning an Underw...

Define the Planning an Underwater Inspection? Planning for underwater inspection is important because of - Unknown factors which may be discovered during the diving - Th

Design of steel lug angles with channel sections.., while designing the lug...

while designing the lug angles with the channel section what does "the force not acccounted for by the direct connection of member" mean?

Determine the liquidity index and void ratio of the sample, A piece of clay...

A piece of clay taken from a sampling tube has a wet weight of 1.553 N and volume of 95.3 cm . After drying in an oven for 24 hours at 105°C, its weight is 1.087 N. The liquid and

Main purpose of conducting load test for piling works, Question What is...

Question What is main purpose of conducting load test for piling works ? Answer Pile load test gives information on ultimate bearing ability but not settlement be

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd