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

Analysis and design Of Swimming Pool, Hi Sir I have a graduation project ...

Hi Sir I have a graduation project part (A) in this semester. I have chosen topic (Analysis and design of Swimming Pool). I got this project ready from friend so I want Presented

Survey, relationship between included angles and whole circle bearing

relationship between included angles and whole circle bearing

Marked., who invented the first LA abrasion test machine

who invented the first LA abrasion test machine

Major functions of features observed in a typical manhole, Question Wha...

Question What are the major functions of following features observed in a typical manhole ? Answer (i) Groove near benching, (ii) R.S.J. (iii) double seal manhole cove

Timber, charring of timber

charring of timber

What is the absolute pressure scale, Absolute pressure is measured from a v...

Absolute pressure is measured from a vacuum (0 PSI) and atmospheric pressure is14.7PSIa or 14.7 PSI above a vacuum 1PSI on a tire pressure gauge is known as 1PSIg = 15.7PSIa 10PSIg

Cement testing, explain the importance of following standard procedure

explain the importance of following standard procedure

Underwater Rebound Hammer, Would there be a difference in the result of an ...

Would there be a difference in the result of an underwater rebound hammer versus a typical rebound hammer?

What do you mean by manhole loss, Q. What do you mean by Manhole loss? ...

Q. What do you mean by Manhole loss? Manholes are provided in locations where there are changes in direction, size and gradient of gravity pipelines. Generally practice for str

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