Various features of TMT bars

Thermo mechanically treated (TMT) bars are high strength deformed steel bars which are used in reinforced cement concrete work. TMT bars have strength, ductility, welding ability, bending ability etc. These bars have following features.

• Earthquake resistance
• Corrosion resistance
• High thermal resistance
• More bonding strength
• Economical and safe in use
• Better ductility and malleability
• High yield strength and toughness
• No loss in strength at welded joints

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Material purchasing guidelines from Gharexpert.com

Do you know homeowners can be charged of more money while purchasing raw materials and during execution construction works? You can save lots of money on your home construction projects following ‘Raw Material Purchasing Guidelines’ from www. GharExpert.com

• Buy quality cement and bricks: The strength of a building depends on the quality of cement which should be from a reputed manufacturer bearing his trade mark and its grade. The cement of inferior quality can cause cracks in building. Also ensure that first class bricks are used for foundation and strong construction.
• Purchase good steel bars: Steel bars should be sound, free from cracks, surface flaws, laminations, jagged and imperfect edges. They are free from dust, loose rust, and coats of paints, oil or other coatings which reduce the strength of bond. The steel bar is bent accurately to the size and shape as shown in drawings.
• Ensure the quality of marble and granite: Marble stone should be hard, sound, dense, and homogeneous in texture. It should be uniform in color, veining and be free from stains, cracks, decay and weathering etc. Granite is becoming popular as it is hard and available a variety of colors. Check patches, discoloration, hairlines, cracks, deep pin holes on the surface.

For more raw material purchasing guidelines, click here.
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Checklist before Laying Cement Concrete

There are many precautionary measures before you lay cement concrete for any good construction. Make sure form work /shuttering for line, level and its strength. Steel bars and their placing should be checked. Ensure that there is proper cover to steel bars and adequate numbers of sports/chairs under crank bars. The planks or plates provided for walking over reinforcement are not disturbed during working.



Electrical pipes, fan boxes etc. are laid before lying cements concrete. The gap in shuttering plates is sealed properly by jute bags /mortar /rubber etc. and shuttering plates are properly oiled. Proper curing must be ensured after laying RCC slab. Raw materials should be of good quality and sufficient in quantity. The arrangements are taken in advance in case of rains etc.

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Precautions for Steel Bars in RCC Work

All finished steel bars for reinforced work are neatly rolled to the dimension and weights as specified. They are sound, free from cracks, surface flaws, laminations, rough, jagged and imperfect edges and other defects. The bars are clear, free from loose mil scales, dust and loose rust coats of paints, oil or other coatings which may destroy or reduce bond strength.

They are stored in such a way as to avoid distortion and to prevent deterioration and corrosion. The steel bars are not cleaned by oily substance to remove the rust. The bar is bent correctly and accurately to the size and shape as shown in drawings. If possible, the bar of full length is used.

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