Sometime it may happen that, the aggregate available at site is not conforming to the desired grading. In such case two or more aggregates from different sources may be combined to get the required grading. Fineness modulus value can be used as a technical way to blend coarse aggregate with fine aggregate to produce desired … Read more
Bricks are the building blocks of a building. If the quality of brick used in a structure is not good then it can lead to serious damages of building. Therefore it is necessary to check the quality of brick before using it in any construction activities. There are some field tests that we can conduct … Read more
It is necessary to check the quality of cement on site at the time of preliminary inspection. It is not possible to check all the engineering qualities of cement on site but there exist some field test which gives us a rough idea of quality of cement. While on site we can perform these field … Read more
Seasoning of Timber When a tree is newly felled, it contains about 50% or more of its own weight as water. This water is in the form of sap and moisture. The water is to be removed before the timber can be used for any engineering purpose. In other words, the timber is to be … Read more
Ribbed Tor Steel Bars This is a type of deformed high strength steel. These bars are manufactured by controlled cold twisting of hot rolled bars. These bars have ribs or projection on their surface. The ribbed tor steel bars are available in different sizes varying 6mm to 50 mm in diameter. These bars are commonly … Read more
Compaction should not be confused with consolidation. At the end of the consolidation and/or compaction process, a closer packing of soil grains results, which leads to increased shear strength and decreased compressibility and permeability. Difference Between Compaction and Consolidation Soil Compaction It is a dynamic process Compaction is almost instantaneous Densification is due to reduction … Read more
Why to Use Clean Sand for Mortar? Contaminated sand will not bind with cement, hence is weakening the mortar. Also sand with high percentage of clay or silt will weaken the mortar, because the clay or silt contains too many fines that needs to be covered by cement for proper binding. Why Use Fresh Cement … Read more
Steels should be stored in such a way, so as to avoid distortion and to prevent deterioration and corrosion. Steels of different classes should be stored separately. Follow the guidelines given below while storing steel on site. Storing of Steel Reinforcement Store bars of different classes, sizes and lengths separately to facilitate issues in such … Read more
While sampling cement from a lot (consisting of a number of cement bags), the lot is divided into a number of sub-lots. Number of sub-lots into which a lot is to be divided is depends upon the weight of the lot. Use the following table while dividing the lot into sub-lots. Weight of the lot … Read more
Packing and Marking of Aggregate Sample Before dispatching, each sample of aggregate is packed separately in such a way so as to prevent loss of any fine material. Use container or sample bag to pack coarse aggregate. Use tight container or closely woven bags to pack fine aggregate and all-in-aggregate; so that there is no … Read more
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