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

Design Mix M35/C35, What is the actual mix propotion for M35/ C35 design mi...

What is the actual mix propotion for M35/ C35 design mix concrete

Revit , how to use the revit program

how to use the revit program

Introduction to engineering mechanics, Deternim the angle A for which the m...

Deternim the angle A for which the moment of the 500N force is maximum about a point o. also find the maximum momentum

Fore bearing, find out the interior angleS with diagrame LINE AB, BC, CD, D...

find out the interior angleS with diagrame LINE AB, BC, CD, DE, EA Fore bearing 60''30" , 122'' , 46'' , 205''30" , 300''

Marked., who invented the first LA abrasion test machine

who invented the first LA abrasion test machine

Design of flexural members, Design of Flexural Members: Here you have ...

Design of Flexural Members: Here you have learnt how to design simple steel beams of rolled steel sections subjected to transverse loading. You have also known how to take

Determine the ultimate bearing capacity of a square footing, Determine the ...

Determine the ultimate bearing capacity of a square footing, 1 m × 1 m, resting on saturated clay of unconfined compression strength of 180 kN/m 3 and a bulk density of 18 kN/m 3

Varignon''s Theorem, What is the easiest way to give proof the varignon''s ...

What is the easiest way to give proof the varignon''s theorem? Help please guys

Epoxy-coated bars vs galvanized bars, Bonding performance to concrete: Epox...

Bonding performance to concrete: Epoxy-coated bars vs. galvanized bars  Based on the findings of CEB Bulletin 211 the bonding of galvanized bars to concrete is lower in early

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