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I am Md. Nurunnabi from Bangladesh.This blog is intended for sharing my academic and research interests and also my practical experiance. I have tried to compose and configure all the information regarding my research works and professional attachments. I hope this blog will work as a platform for sharing knowledge and developing affiliation.

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Difference between WSD and USD design Continue Reading Difference between WSD and USD design

WSD- WORKING STRESS DESIGN: Stress condition of structural member under working load is given attention. Full strength of material is not utilizd and is reduced by a factor. Stresses calculated are within the elastic limit. Is less economical than USD. USD- ULTIMATE STRESS DESIGN: Focuses on the strength capacity of the members at conditions corresponds to failure. Material properties are assessed and used in design. Loads are multiplied by a factor. More economical

What is a TMT steel rod and what is the difference between HYSD and TMT bars? What are the pros of TMT bars over HYSD and mild steel?

TMT stands for Thermo Mechanically Treated. The TMT bars have a hard outer surface and a softer core. Their manufacturing process includes hot rolled steel wires passed through water. This makes the surface hard and keeps the core warmer and softer. This helps in making the steel corrosion resistance and also increase its weldability. Technically TMT means a type of quenching and tempering process and it would not be precise to call it a Thermal+Mechanical treatment. Because, even the HYSD bars are treated at high temperatures and then rolled and twisted for shaping and hence it is also thermally + mechanically treated. So the difference lies in the exact process of making these two types of bars and not just in their names. On the other hand, HYSD stands for High Yielding Strength Deformed bars. These bars have more yield strength than Mild Steel. Unlike TMT bars, HYSD bars are both hot or cold worked. They are graded as Fe 415 or Fe500. HYSD = Torsed/twisted steel (TOR Steel ...

Civil Engineering Basic Knowledge :-

Cement's initial setting time should be 30 min(Minimum) and 90 min(maximum). Final setting time of cement should be=10 hours What type of test should perform for a road's improved subgrade sand filling: 1.FM of fine aggregates 2.California bearing ratio 3.Dynamic cone penetration test 4.MDD of fine aggregate 5.Field Dry Density. What type of test should perform for earth filling in Embankment with specified soil: 1.Plasticity index. What type of test should perform for Concrete Work: 1.Setting time of cement 2.Compressive strength of cement 3.Gradation of Coarse aggregates. 4.FM of fine aggregates. 5.Water absorption of coarse aggregates 6.Loss angels abrasion test 7.Concrete cylinder casting & testing What type of test should perform for M.S High strength deform bar 1.Tensile strength,Elongation and unit wt. What type of test should be perform for Brick work: 1.Setting time of cement 2.Compressive strength of cement 3.FM of fine aggregates 4.Compressive streng...

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