Author: roy
BUILDING MATERIALS
STONES Stone is a ‘naturally available building material’ which has been used from the early age of civilization.It is available in the form of rocks, which is cut to required size and shape and used as building block.It has been used to construct small residential buildings to large palaces and temples all over the world.Red … Continue reading BUILDING MATERIALS
Tests on concrete
1.Crushing Strength Test: Metallic moulds of size 150 mm × 150 mm × 150 mm are used forcasting concrete cubes. Before filling mould, it is properly oiled on its inner surfaces, so that cubes canbe easily separated. Fresh cube is filled with concrete to be tested in 3 layers and kept in the room. After24 … Continue reading Tests on concrete
Important one liners
💥Compacting Equipments and it's USES:- ⚡️ Tampers and Frog Hammers:-For Compacting in confined areas like trenches,behind bridge abutments. ⚡️Smooth wheel rollers:-Granular Soils. ⚡️ Pneumatic tyred Rollers:- Cohesive and Non Cohesive soils. ⚡️Sheep foot Rollers:-Best for Cohesive Soils(Clays). ⚡️Vibratory Compactors:-Granular Soils(best method for Sands). 🌟IMP:-m+3=2j..For perfect 2d trussm+3>2j..For Redundant 2d trussm+3<2j..For Deficient 2d truss m+6=3j..For perfect … Continue reading Important one liners
Bent up bars
Bent up bars: Are the main reinforcements bent at a suitable angle to act as shear reinforcements.Reinforcements are bent up to the supports/ends where greater compressive force occurs. Bars Are Bend Near At Support To: 1- To resist shear force .2-To resist (NBM) adjacent at supports.3- To increment the strenth of RCC in slab.4- Bent Up bar can … Continue reading Bent up bars
DUMPY LEVEL
What is Dumpy Level? ✓The dumpy level is an optical surveying leveling instrument consisting a telescope tube firmly secured in two collars fixed by adjusting screws to the stage by the vertical spindle. ✓The telescope of dumpy level can rotate only in a horizontal plane. Relative elevation of different points of a surveying land is determined … Continue reading DUMPY LEVEL
Punching shear
What is punching shear? ✓The weight of a slab supported on a column induces shear stresses in the slab.✓ These stresses, if sufficient and where additional reinforcement is not provided, would result in the column ‘punching’ through the slab.(shown in image above) ✓Punching shear failures arise from the formation of diagonal tension cracks around the loaded area, … Continue reading Punching shear
Important points from complex stresses (Strength of materials)
In 2-D stress system, there are 4 stress components out of which 3 are independent and 1 is dependent In 3-D stress system, there are 9 stress components out of which 6 are independent and 3 is dependent Maximum value of normal stress is called as Major Principal stress Minimum value … Continue reading Important points from complex stresses (Strength of materials)
Important points from complex stresses (Strength of materials)
In 2-D stress system, there are 4 stress components out of which 3 are independent and 1 is dependent In 3-D stress system, there are 9 stress components out of which 6 are independent and 3 is dependent Maximum value of normal stress is called as Major Principal stress Minimum value … Continue reading Important points from complex stresses (Strength of materials)
Important points from Simple stress and strain (strength of materials)
👉 Stress, strain and Moment of inertia are tensor quantities 👉 Stress is dependent quantity and strain is independent quantity 👉 Anisotropic materials have direction dependent properties 👉 Stress is produced due to resistive force but its nature (direction) is due to applied force 👉 Object free to deform or free to move without showing … Continue reading Important points from Simple stress and strain (strength of materials)
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