Journal of Engineering and Development, Vol. 18, No.5, September 2014, ISSN 1813- 7822 61 Flexural Strength of Hybrid Beams Containing Reactive Powder Concrete and Conventional Concrete Prof. Dr. Kaiss Fouad Sarsam Building and Constructions Engineering Department, University of Technology Lecturer. Dr. Mohammed Hashim Mohammed Highways and Transportation Engineering Department, College of Engineering Al-Mustansiriyah University Abstract This paper presents an experimental investigation consisting of casting and testing in flexure twenty four rectangular simply supported reinforced concrete beams.Three of the tested beams are made with conventional concrete (CC), five with reactive powder concrete (RPC) and sixteen as hybrid beams of the two concretes. RPC is used in tension in ten hybrid beams and in compression in the other six beams. Experimental results have generally shown that higher ultimate loads (P u ) are obtained with the increase of RPC layer thickness (h R /h), steel fibers volumetric ratio (V f ) and longitudinal steel ratio (ρ) for hybrid beams with RPC in tension as well as in compression. However, the effect of (ρ) is more pronounced than the other factors. Using RPC in compression is found to be more effective than using RPC in tension. The increasing ratios for ultimate loads of hybrid beams with RPC in compression, ρ=3.36% and V f = 1% (compared to CC beams) are 47.13% and 71.97% for (h R /h) of 0.25 and 0.5, respectively. These ratios are higher than those for hybrid beams with RPC in tension, ρ=3.36% and V f = 1%, for h R /h of 0.25 and 0.5 by 35.67% and 37.58%, respectively. Key Words: Reactive Powder Concrete, flexural strength, hybrid beams. اﻟﮭﺟﯾﻧﺔ ﻟﻠﻌﺗﺑﺎت اﻻﻧﺛﻧﺎء ﻣﻘﺎوﻣﺔ اﻟﺧرﺳﺎﻧﺔ و اﻟﻔﻌﺎﻟﺔ اﻟﻣﺳﺎﺣﯾق ﺧرﺳﺎﻧﺔ ﻣن اﻟﻣﺗﻛوﻧﺔ اﻟﺗﻘﻠﯾدﯾﺔ ا. د. ﺳﺮﺳﻢ ﻓﺆاد ﻗﯿﺲ م. د. ﻣﺤﻤﺪ ھﺎﺷﻢ ﻣﺤﻤﺪ اﻹﻧﺸﺎءات و اﻟﺒﻨﺎء ھﻨﺪﺳﺔ ﻗﺴﻢ/ اﻟﺘﻜﻨﻮﻟﻮﺟﯿﺔ اﻟﺠﺎﻣﻌﺔ اﻟﻨﻘﻞ و اﻟﻄﺮق ھﻨﺪﺳﺔ ﻗﺴﻢ/ اﻟﺠ اﻟﻤﺴﺘﻨﺼﺮﯾﺔ ﺎﻣﻌﺔ اﻟﺧﻼﺻﺔ اﻟﺒﺤﺚ ھﺬا ﯾﻘﺪم ﺗﺤﺮﯾﺎ ﻣﺨﺘﺒﺮﯾ ﯾﺘﻀﻤﻦ ﺎ اﻟﻔﺤﺺ و اﻟﺼﺐ) اﻻﻧﺜﻨﺎء ﺗﺤﺖ( ﻣﺴﻠﺤﺔ ﺧﺮﺳﺎﻧﯿﺔ ﻋﺘﺒﺔ ﻋﺸﺮﯾﻦ و ﻷرﺑﻊ اﻻﺳﻨﺎد ﺑﺴﯿﻄﺔ و اﻟﻤﻘﻄﻊ ﻣﺴﺘﻄﯿﻠﺔ. اﻟﻤﺴﺎﺣﯿﻖ ﺧﺮﺳﺎﻧﺔ ﻣﻦ ﺧﻤﺲ و اﻟﺘﻘﻠﯿﺪﯾﺔ اﻟﺨﺮﺳﺎﻧﺔ ﻣﻦ ﻣﺼﻨﻌﺔ ﻛﺎﻧﺖ ﻋﺘﺒﺎت ﺛﻼث اﻟﺨﺮﺳﺎﻧﺘﯿﻦ ﻣﻦ ھﺠﯿﻨﺔ ﻛﻌﺘﺒﺎت ﻋﺸﺮة ﺳﺖ و اﻟﻔﻌﺎﻟﺔ. ﻓ اﻟﺸﺪ ﻣﻨﻄﻘﺔ ﻓﻲ اﻟﻔﻌﺎﻟﺔ اﻟﻤﺴﺎﺣﯿﻖ ﺧﺮﺳﺎﻧﺔ اﺳﺘﺨﺪﻣﺖ ﻋﺸﺮ ﻲ اﻻﺧﺮﯾﺎت اﻟﺴﺖ ﻓﻲ اﻻﻧﻀﻐﺎط ﻣﻨﻄﻘﺔ ﻓﻲ و ھﺠﯿﻨﺔ ﻋﺘﺒﺎت. اﻧﮫً ﻋﻤﻮﻣﺎ اﻟﻤﺨﺘﺒﺮﯾﺔ اﻟﻨﺘﺎﺋﺞ اظﮭﺮت ﺑﺎﻻﻣﻜﺎن ﻋﻠﻰ اﻟﺤﺼﻮل
Flexural Strength of Hybrid Beams Containing Reactive Powder Concrete and Conventional Concrete
May 10, 2023
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