Consistency of mortar is tested by using a standard cone apparatus. In this test a cone weighing 300 g is allowed to fall from a specified height to penetrate through the mortar. The depth of penetration of the cone is called its consistency value. It is expressed in mm. To read the test procedure click … Read more
In order to check the quality of masonry mortar, we have to conduct different tests on mortar. The quality and accuracy of test result is dependent upon the type of sample tested. Therefore it is required to follow some guidelines at the time of sampling. Samples of masonry mortar are obtained in equal increments and … Read more
Storing of Aggregate on Site Store aggregate at site on a hard dry and level patch of ground If such a surface is not available then prepare a platform of planks or old corrugated iron sheets, or a floor of bricks, or a thin layer of lean concrete so as to prevent contamination with clay, … Read more
Storing of Timber on Site Store the timbers in stacks upon well treated and even surfaced beams sleepers or brick pillars so as to be above the ground level by at least 150 mm. Store members of different length and material separately. Materials of equal length are piled together in layers with wooden batters, called … Read more
Sand used for plaster work can be natural sand, crushed stone sand or crushed gravel sand. The grading limit of sand for plaster work; for internal and external wall and ceiling should be as given in the table below. Grading Limit of Sand for Plaster Work IS Sieve Size Percentage Passing 10 mm 100 4.75 … Read more
Generally we specify workability of concrete in terms of its slump test value. But sometimes it is also specified by another test called compaction factor. The relation between slump and compaction factor is roughly as follows. Relation Between Slump & Compaction factor Workability Slump in mm Compaction factor Very stiff – 0.70 Stiff 0 to … Read more
There are some field tests that can be carried out in the field in order to check the quality of sand used for construction. Following tests may be carried out to ascertain the properties of sand: Field Test on Sand Take a glass of water and add some quantity of sand in it. Then shake … Read more
A concrete is said to be of good quality, if it is strongest, densest, most workable and most economical for the job for which it is prepared. Amount of cement used in concrete should be low and that of aggregate should be high. If the following general requirements are fulfilled, then we can produce the … Read more
Stacking and Storing of Bricks at Site Stack the bricks close to the site of work so that less effort is required to unload and transport the bricks again by loading on pallets or in barrows. Different types of bricks (such as clay bricks, clay fly ash bricks etc) shall be stacked separately. Bricks of … Read more
Reference IS 3952-1988 – Specification for burnt clay hollow bricks for walls and partitions. General Quality o Bricks shall be free from cracks and flaws and nodules of free lime. o Bricks shall have smooth rectangular faces with sharp corners o Bricks shall be of uniform in colour and texture. o Bricks shall be free … Read more
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