Post on 30-Dec-2015
description
QUALITY CONTROL OF
CONSTRUCTION MATERIALS
by
K. RAMESH
Research Officer,Engineering Materials Laboratory,
A.P. Engineering Research Laboratories,Himayatsagar, HYDERABAD-500030.
Construction materials
• Cement
• Aggregates (Fine & Coarse)
• Water
• Steel Reinforcement
• Cement Concrete
Categories of I.S. Codes
• Codes which give specifications• Codes which give methods of tests
Important I.S. Codes Material Specifications Methods of tests
1. Cement 269-1989, 8112-1989, 12269-1987, 1489(P.1&P.2)-1991
4031(P.1 to P.15)-1996,
4032-1985
2. Aggregates 383-1970 2386(P.1 to P.8)-1963
3. Water 456-2000 3025(P.1 to 32)-1987
4. Steel
Reinforcement
432(P.1 &P.2)-1982, 1786-2008
1608-1995, 1599-1985,
228(p.1 to 24)-1987
5. Cement
Concrete
456-2000 516-1959, 1199-1959
Tests on cement(Physical Tests)
• Standard consistency
• Setting times (Initial and Final )
• Compressive strength
• Fineness
• Soundness
• Specific Gravity
Tests on cement(Chemical Tests)
• Ratio of percentage of lime to percentages of silica, alumina and iron oxide
• Ratio of percentage of alumina to percentage of iron oxide
• Insoluble residue, percent by mass• Magnesia, percent by mass• Total sulphur content, percent by mass• Total loss on ignition• Total chloride content –
Tests on fine aggregate
• Sieve analysis
• Deleterious materials
• Soundness
• Specific Gravity
Tests on coarse aggregate
• Sieve analysis• Flakiness index • Elongation index• Deleterious materials• Impact value• Crushing value • Abrassion value• Soundness• Specific gravity• Alkali aggregate reactivity
Tests on water
• Neutralization
• Organic solids
• Inorganic solids
• Sulphates
• Chlorides
• Suspended matter
Tests on steel reinforcement(Physical Tests)
• Tensile test
• Bend test
• Rebend test
• Bond test
Tests on steel reinforcement(Chemical Tests)
• Chemical composition
(Carbon, Sulphur, Phosporous, Sulphur & Phosporous)
Tests on cement concrete (Strength Tests)
• Compressive strength
• Flexure strength
• Modulus of elasticity
Tests on cement concrete (Workability & Other Tests)
• Slump test• Compaction factor test• Vee-bee test• Analysis of freshly mixed concrete• Density• Yield• Air content• Cement content of hardened concrete• Drying shrinkage
• Moisture movement