🕑 Reading time: 1 minuteDifferent types of field tests on building lime to check the quality of lime to be used in mortar mix for construction works and their procedures are discussed. Tests on building lime can be carried out as field tests or as laboratory tests. The detailed laboratory tests on building lime as per IS 6932 – 1973 is discussed in another article. Simple field tests on building lime helps to define the quality of lime when it is directly bought from the kiln. Mainly the field tests are used to test the quality lime in the form of quicklime i.e. calcium oxide (CaO). The industrial consumers demand minimum lime content. If 60 % of calcium oxide for hydrated lime is the minimum requirement means that nearly 80% is the maximum that is possible. In situations where lime is used for chemical stabilization, in road making, it is the impurities in chemical means, in the form of lime that is important.
- Samples for Physical Tests on Building Lime
- Field Tests on Building Lime for Construction Works
Samples for Physical Tests on Building LimeThe test samples that is required to conduct the physical test must be collected as fast as possible before it starts to deteriorate. To carry out the test for quicklime and for hydraulic lime, from each lot, 3 samples were taken. The sample size that is recommended for quicklime is given in table-1. For tests on hydraulic lime, the weight should not be lesser than 5kg.
Table-1: The Sample Size for Physical Test for Building Lime
|Lot Size, Tonne||Gross Sample Size for Lump Quicklime, Kg||Gross Sample Size for Powdered Quicklime, Kg|
|Up to 100||500||250|
|101 to 300||1000||500|
|301 to 500||1500||750|
|501 to 1000||2000||1000|