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SOIL INVESTIGATION AND EXPLORATION
The purpose of site investigation is to get clear information about the soil and hydrological conditions at the site. Site reconnaissance It means the inspection of the site and study of topography to get a proper information about the soil...
Continue reading full story (read 130 views times)ENVIRONMENTAL EXPOSURE CONDITIONS OF STRUCTURES
ENVIRONMENTAL EXPOSURE CONDITIONS OF STRUCTURES Sl. No. Environment Exposure Conditions i Mild Concrete surfaces protected against weather or aggressive conditions, except those situated in coastal areas ii Moderate Concrete surface sheltered from severe rain or freezing whilst wet; concrete exposed...
Continue reading full story (read 26 views times)PHYSICAL REQUIREMENTS FOR ADMIXTURES
Physical requirements for accelerating, retarding, water reducing and air-entraining admixtures Note: AA – Accelerating Admixture RA – Retarding Admixture WRA – Water-reducing Admixture AEA – Air-entraining admixture NSA- Super plasticizing admixture (Normal) RSA- Super plasticizing admixture (retarding) Requirement...
Continue reading full story (read 25 views times)PROPERTIES OF AGGREGATES
1. AGGREGATES: BULK DENSITY, SPECIFIC GRAVITY AND VOIDS BULK DENSITY River sand Fine 1.44 Medium 1.52 Coarse 1.60 Beach or river shingle 1.60 Broken stone 1.60 Stone screenings 1.44 Broken...
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GRADING LIMITS FOR AGGREGATES
GRADING LIMIT FOR SINGLE – SIZED AGGREGATES (Clause 4.1 and 4.2 of IS: 383- 1970) IS Sieve Percentage passing for single sized aggregates of nominal size(mm) 63 mm 40 mm 20 mm 16 mm 12.5 mm 10 mm 80 mm...
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PRODUCTION OF COLOURED FINISHES WITH WHITE CEMENT
PRODUCTION OF COLOURED FINISHES WITH WHITE CEMENT Colours Desired Commercial Names of Colours Approx. Qty required (kg per bag of cement) Light Shade Medium Shade Greys, blue-black and black Lampblack*, or carbon black* or black oxide of manganese* or mineral...
Continue reading full story (read 12 views times)PROPERTIES OF VARIOUS GRADES OF ORDINARY PORTLAND CEMENT (OPC)
Physical and Chemical Properties of Various Grades of Ordinary Portland Cement (OPC) Type of Cement 33 Grade (IS: 269-1989) 43 Grade (IS:8112-1989) 53 Grade (IS: 12269-1987) PHYSICAL PROPERITES Minimum...
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