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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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i want ppt about cracks in rcc structure to presen..................[:=> 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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ructural cracks
 Moisture changes
 Thermal movement
 Elastic deformation
 Chemical reaction
 Foundation movement
 Settlement of soil
 Vegetation
CHANGE IN MOISTURE
Most building materials expend when they absorb moisture from atmosphere and shrink when they are dry. Cement made materials shrink due to drying up of the moisture used in their construction. The factors causing shrinkage in cement concrete and cement mortar are following.
 Excessive Water
The quantity of water used in the mortar mix can cause shrinkage. Vibrated concrete has less quantity..................[:=> 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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i want ppt ab..................[:=> Show Contents <=:]



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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makes it possible to restore the initial alkalinity of the concrete
externally applied alkaline gel covering the external conductor is drawn
alkalinity increase of a carbonated concrete restores the passivation
The carbonate problem is solved
Organic Corrosion Inhibitors
combine other organic chemicals for successfully inhibiting corrosion
inhibitor forms a protective barrier on the reinforcing steel
barrier prevents reaction between the iron and chloride
REPAIR AND MAINTENANCE OF CONCRETE
. Experience has shown that there are certain portions of exposed concrete structures m..................[:=> 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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l settlement of foundation due to any of following causes.
• Unequal bearing pressure under different parts of the structure
• Bearing pressure being in excess of safe bearing strength of the soil
• Low factor of safety in the design of foundations
• Local variation in the nature of supporting soil
Buildings on expansion clays are extremely crack prone. The soil movement in such clay is more appreciable upto a depth of 1.5 to 2M and this cause swelling and shrinkage and results in crack in the structure. The cracks due to settlement are usually diagonal in shape. Crack appeari..................[:=> 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 a seminars on prevention of water leakage through water contact rcc structures. It would be helpful..................[:=> Show Contents <=:]



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