ﻤﻘﺎﻭﻤﺔ ﺍﻟﺨﺭﺴﺎﻨﺔ ﻋﻠﻰ ﺍﻟﻀﻐﻁ ﻭﺘﺄﺜﻴﺭﻫﺎ...

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ﻤﺠﻠ ﺍﻟﻬﻨﺩﺴﻴﺔ ﻟﻠﻌﻠﻭﻡ ﺩﻤﺸﻕ ﺠﺎﻤﻌﺔ- ﺍﻟﻤﺠﻠﺩ ﺍﻟﺭﺍﺒﻊ ﻭﺍﻟﻌﺸﺭﻭﻥ- ﺍﻟﻌﺩﺩ ﺍﻷﻭل- 2008 . ﻤﻠﺤﻡ- . ﺤﻨﺎ9 ﺍﻟﻀﻐﻁ ﻋﻠﻰ ﺍﻟﺨﺭﺴﺎﻨﺔ ﻤﻘﺎﻭﻤﺔ ﺍﻷﻭﺴﺎﻁ ﻤﻘﺎﻭﻤﺔ ﻓﻲ ﻭﺘﺄﺜﻴﺭﻫﺎ ﺍﻟﺤﺎﻤﻀﻴﺔ ﺍﻟﺩﻜﺘﻭﺭ ﻤﻠﺤ ﻋﺼﺎﻡ1 ﺍﻟﺩﻜﺘﻭﺭ ﺤﻨ ﺒﺴﺎﻡ2 ﺍﻟ ﻤﻠﺨﺹ ﺍﻟﻌﻘﺩ ﺸﻬﺩ ﺍﻷﺨﻴﺭ ﺍﻟﺨﺭﺴـﺎﻨﺔ ﺼـﻨﺎﻋﺔ ﻓـﻲ ﻤﻠﺤﻭﻅﺎ ﺘﻁﻭﺭﺍ ﺍﻟﻤﺎﻀﻲ ﺍﻟﻘﺭﻥ ﻤﻥ، ﻓﻌﺭﻓـﺕ ﺍﻟﻤﻘﺎﻭﻤﺔ ﻋﺎﻟﻴﺔ ﺍﻟﺨﺭﺴﺎﻨﺔ(60-100MPa) ﺍﻟﺒﻭﻟﻤﻴﺭﻴﺔ ﻭﺍﻟﺨﺭﺴﺎﻨﺔ... ﺍﻟـﺸﻐل ﻭﺃﺼـﺒﺢ ﺍﻟـﺦ، ﻤﺭﺍﻜﺯ ﻓﻲ ﺍﻟﺸﺎﻏل، ﺍﻟﺒﺤﻭﺙ ﺍﻟﺨﺭﺴﺎﻨﻴﺔ ﺍﻟﻤﻨﺸﺂﺕ ﻭﺴﻼﻤﺔ ﻟﻠﺨﺭﺴﺎﻨﺔ ﺍﻟﺠﻴﺩ ﺍﻷﺩﺍﺀ ﻋﻠﻰ ﺍﻟﻤﺤﺎﻓﻅﺔ، ﺒﺘﺤـﺴﻴﻥ ﻴﻌـﺭﻑ ﻤﺎ ﺨﻼل ﻤﻥ ﺍﻟﻤﺨﺭﺒﺔ ﺍﻟﺨﺎﺭﺠﻴﺔ ﺍﻷﻭﺴﺎﻁ ﻀﺩ ﺍﻟﻤﺴﻠﺤﺔ ﺍﻟﺨﺭﺴﺎﻨﻴﺔ ﻭﺍﻟﻤﻨﺸﺂﺕ ﺍﻟﺨﺭﺴﺎﻨﺔ ﺩﻴﻤﻭﻤﺔ. ﺘﻘﻴ ﻜﺎﻨﺕ ﺒﺎﻟﺒﻌﻴﺩ ﻟﻴﺱ ﻭﻗﺕ ﻓﺈﻟﻰ ﻤﻘﺎﻭﻤﺘﻬـﺎ ﺨـﻼل ﻤـﻥ ﺍﻟﺨﺭﺴﺎﻨﺔ ﺠﻭﺩﺓ ﺍﻷﺨﺫ ﺩﻭﻥ ﺍﻟﻀﻐﻁ ﻋﻠﻰ ﺍﻟﻤﻴﻜﺎﻨﻴﻜﻴﺔ ﺎﻟﺤﺴﺒﺎﻥ ﺍﻟـﺴﺭﻴﻊ ﺍﻟﻌﻤﺭﺍﻨﻲ ﺍﻟﺘﻁﻭﺭ ﻤﻊ ﻟﻜﻥ ﺃﺨﺭﻯ، ﻗﺭﺍﺌﻥ ﺨـﺼﻭﺼﺎ ﺍﻟﺨﺭﺴﺎﻨﺔ ﻟﺠﻭﺩﺓ ﺍﻟﻤﻘﻴﻤﺔ ﺍﻷﺴﺎﺴﻴﺔ ﺍﻟﻘﺭﻴﻨﺔ ﻫﻲ ﺍﻟﻀﻐﻁ ﻋﻠﻰ ﺍﻟﻤﻘﺎﻭﻤﺔ ﺘﻌﺩ ﻟﻡ ﻭﺘﻨﻭﻋﻪ ﻜﺒﺭﻴﺘﻴﺔ ﺤﺎﻤﻀﻴﺔ، ﻤﺨﺭﺒﺔ، ﻜﻴﻤﻴﺎﺌﻴﺔ ﻷﻭﺴﺎﻁ ﺍﻟﺨﺭﺴﺎﻨﺔ ﺘﺘﻌﺭﺽ ﻋﻨﺩﻤﺎ، ... ﺍﻟﺦ. ﺍﻟﻤﻭﻀﻭﻉ ﻫﺫﺍ ﻋﻠﻰ ﺍﻟﻀﻭﺀ ﺇﻟﻘﺎﺀ ﺃﺠل ﻭﻤﻥ، ﺇﺠﺭﺍﺀ ﺘﻡ ﺍﻟﺒﺤﺙ ﻫﺫﺍ. ﺤﻴﺙ ﺘﻡ ﺃﺭﺒﻌـﺔ ﺘـﺸﻜﻴل ﻓﻴﻪ ﺍﻟﻘﻭﺍﻡ ﻟﻬﺎ ﺍﻟﺨﺭﺴﺎﻨﺔ ﻤﻥ ﺃﻨﻭﺍﻉ ﻨﻔﺴ) ﺃﺒﺭﺍﻤﺯ ﺒﻤﺨﺭﻭﻁ ﺍﻟﻬﺒﻭﻁ ﻗﺭﺍﺒﺔ20cm ( ﺒﻌﻴـﺎﺭﺍﺕ ﻟﻜـﻥ ﻤﺨـﺭﺏ ﺤﻤـﻀﻲ ﻭﺴـﻁ ﺇﻟـﻰ ﺇﺨﻀﺎﻋﻬﺎ ﻭﺘﻡ ﻤﺨﺘﻠﻔﺔ ﺍﻟﻀﻐﻁ ﻋﻠﻰ ﻭﺒﻤﻘﺎﻭﻤﺎﺕ ﻤﺨﺘﻠﻔﺔ ﺍﺴﻤﻨﺕ) ﺍﻟﻜﺒﺭﻴﺕ ﺤﻤﺽ ﺍﻵﺯﻭﺕ ﻭﺤﻤﺽ( ﺒﺘﺭﻜﻴﺯ3% ﻭﻗﻴﻤﺔPH 4 . ﺍﻟﻌﻴﻨـﺎﺕ ﻫﺫﻩ ﺠﺎﻨﺏ ﺇﻟﻰ، ﺘـﻡ ﺍﻟﻁـﻼﺀﺍﺕ ﻤـﻥ ﺒﻨـﻭﻋﻴﻥ ﺍﻟﻌﺎﺩﻴـﺔ ﺍﻟﻤﻘﺎﻭﻤـﺔ ﺫﺍﺕ ﺍﻟﺨﺭﺴﺎﻨﺔ ﻋﻴﻨﺎﺕ ﺒﻌﺽ ﻁﻼﺀ) ﺒﻭﻟﻤﻴﺭﻴـﺔ ﻭﺍﻴﺒﻭﻜﺴﻲ( ، ﺍﻷﻭﻟﻰ ﺍﻟﻌﻴﻨﺎﺕ ﻤﻊ ﻭﻤﻘﺎﺭﻨﺘﻬﺎ. 1 ﻤﺴﺎﻋﺩ ﺃﺴﺘﺎﺫ- ﻗﺴﻡ ﺍﻹﻨﺸﺎﺌﻴﺔ ﺍﻟﻬﻨﺩﺴﺔ- ﺍﻟﻤﺩﻨﻴﺔ ﺍﻟﻬﻨﺩﺴﺔ ﻜﻠﻴﺔ- ﺠﺎﻤﻌ ﺍﻟﺒﻌﺙ. 2 ﺃﺴﺘﺎﺫ- ﻭﺍﻟﻨ ﺍﻟﻤﻭﺍﺼﻼﺕ ﻗﺴﻡ ﻘل- ﺍﻟﻤﺩﻨﻴﺔ ﺍﻟﻬﻨﺩﺴﺔ ﻜﻠﻴﺔ- ﺠﺎﻤﻌ ﺍﻟﺒﻌﺙ.

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    : 3- A.M. Neville-properties of concrete- Longman. 1999. 4- G. Dreux. Guide pratique du Beton, S.D.T.B.T.P France 1985. 5- ASTM C267-82, ASTM Standards in Building Codes U.S.A 1994 . 6- P.C. AITICIN, Btons haute performance, Eyrolles, France 1998 . 7- ACI Manual of concrete practice, ACI Standard 201, 2R-92 (1993), Guide to durable concrete. 8-V.M. Malhotra, Materiaux Complment aires en Cementation, CANMET, CANADA 1987. 9- J. HICKS and al, Determination of Acceptance permeability characteristics for performance-related specifications for Portland cement concrete, final report, Florida Department of Transportation, July 2003 .

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