Difference Between Mortar & Plaster Mortars are used in masonry for joining stones, bricks, blocks etc. and plasters are used for rendering on the outside and inside of walls. The differences between mortar and plaster lie in the capacity of plasters to take better finish, which depend to a very large extent on the type … 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
The sand is used in mortar for the following purposes Bulk It does not increase the strength of mortar. But it acts as adulterant. Hence the bulk volume of mortar is increased which results in reduction of cost Setting If building material is fat lime, the carbon dioxide is absorbed through the voids of sand … 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
Concrete blocks are available in different forms to be used as construction material, such as Solid concrete blocks Hollow concrete blocks Solid & hollow light weight concrete blocks Autoclave aerated concrete blocks Concrete stone masonry blocks While storing these concrete blocks at site, following guidelines should be followed. Guidelines to Follow While Storing Blocks on … Read more
The cement should be stored carefully. Otherwise it may absorb moisture from the atmosphere and may become useless for the structural work. Following precautions are to be taken for the storage of cement. 1. Moisture If moisture is kept away from cement, it is found that cement will maintain its quality for an indefinite period. … Read more
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