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ppt about cracks in rcc structures


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Created at: Thursday 04th of April 2013 03:50:44 AM
Last Edited Or Replied at :Friday 05th of April 2013 01:52:59 AM
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CRACKS IN BUILDING


Posted by: seminar class
Created at: Wednesday 23rd of March 2011 12:10:10 AM
Last Edited Or Replied at :Wednesday 23rd of March 2011 03:39:33 AM
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re creates cracks due to tensile of shear stresses. It is one of the most potent causes of cracking in buildings and needs attention
Elastic Deformation
When the walls are unevenly loaded, due to variation in stresses in different parts of wall the cracks are formed in walls. When two materials having wide different elastic properties are built together under the effect of load, different shear stresses in these materials create cracks at the junction. Dead and live loads cause elastic deformation in structural components of a building.
Chemical Reaction
Chemical reactions in..................[:=> Show Contents <=:]



ppt about cracks in rcc structures


Posted by:
Created at: Thursday 04th of April 2013 03:50:44 AM
Last Edited Or Replied at :Friday 05th of April 2013 01:52:59 AM
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Protection repair and maintenance of rcc structures


Posted by: smart paper boy
Created at: Monday 18th of July 2011 04:24:19 AM
Last Edited Or Replied at :Monday 18th of July 2011 04:24:19 AM
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prepared by adding liquid styrene butadiene latex to conventional concrete
Latex modified concrete should be placed in the evening or at night to reduce cracking
Use of Silica Fume Concrete
Silica fume reacts with calcium hydroxide to form additional cementitious material
Silica fume is extremely puzzolonic material that reacts with calcium hydroxide
Performance of concrete is good to excellent
Epoxy Coated Reinforcing Bars
Pre-cleaned reinforcing steel bars are protected with a coating of powdered epoxy
Coating blocks chloride ions
Performance is poor to excellent
Post curing heat..................[:=> Show Contents <=:]



CRACKS IN BUILDING


Posted by: seminar class
Created at: Wednesday 23rd of March 2011 12:10:10 AM
Last Edited Or Replied at :Wednesday 23rd of March 2011 03:39:33 AM
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n due to chemical reactions. Some common instances of chemical reactions are following.
• Sulphate attack on cement products
• Carbonation in cement based materials
• Corrosion of reinforcement in concrete
• Alkali aggregate reaction
Certain chemical reaction in building materials result is appreciable change in volume of resulting products and internal stresses are set up which may result in outward thrust and formation of cracks.
Soluble sulphate reacts with tricalcuium aluminates in cement and hydraulic lime and form products which occupy larger volume and ends in develop..................[:=> Show Contents <=:]



Prevention of water leakage through construction joints in rcc structures


Posted by: leo_chandu
Created at: Friday 11th of March 2011 01:18:47 AM
Last Edited Or Replied at :Friday 11th of March 2011 01:18:47 AM
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Hi,
I am a final year civil engineering student. I have to be presenting ..................[:=> Show Contents <=:]



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