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
Following are the properties of a good mortar: Properties of Good Mortar It should be capable of developing good adhesion with the building units such as bricks, stones etc. It should be capable of developing the designed stresses. It should be capable of resisting penetration of rain water. It should be cheap. It should be … Read more
The trees are the tallest living things and the man chops down forests without replanting for tomorrow. The forests are vital for the economic prosperity of land. The man and trees are closely linked and without trees, the life on our planet would be endangered. Importance of Trees It conserves soil moisture It precipitates rainfall … 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