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Behavior of Recycled Aggregate Fibrous Reinforced Beams Under Flexural and Shear Loading | ||
| Engineering and Technology Journal | ||
| Article 19, Volume 37, 3C, 2019, Pages 338-344 PDF (959.68 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.30684/etj.37.3C.6 | ||
| Authors | ||
| Eyad K. Sayhood1; Ali Sadiq Resheq2; Farah L. Raoof2 | ||
| 1Civil EngineeringDepartment, University of Technology - Iraq | ||
| 2Civil Engineering Department, University of Technology - Iraq | ||
| Abstract | ||
| The use of recycled concrete aggregates (RCA) to replace part or all of the natural coarse aggregates (NCA) in the production of concrete has been on the increase. Such use helps in the protection of the natural resources and in the reduction in the use o f landfills. The experimental work consists of casting and testing ten rectangular simply supported reinforced concrete beams of dimensions (1500*150*240) mm with concentric point load at mid span as well as tests for control specimens to determine the mechanical prope rties of the concert. Five beams of these ten beams were designed to fail in flexure and other five beams were designed to fail in shear. Two beams were considering as a reference beams using normal aggregate (NCA) and two beams were considering as a refer ence beams using recycled aggregate (RCA. The other six beams were cast using recycled concrete aggregates (RCA) with steel fiber in three different volumetric ratio (vf).The present investigation contains three main variables: Coarse aggregate (normal and recycled). Transverse reinforcement (with stirrups spacing 50 mm for flexure failure mode and without stirrups for shear failure mode). Steel fiber (vf) = (0.5) %, (1) % and (1.5) %. In addition, constant longitudinal reinforcement ratio 0.012 . Experiment al results have generally showed that ultimate loads (Pu) of beams made with RA are approximately close to the results of beams made with NA but with decrease of values (14% and 21%) for flexural and shear behavior respectively. The ultimate load of fibrou s concrete beams is greater than beams without steel fiber by (33% - 50%) for shear behavior and (21% - 35%) for flexure behavior. | ||
| Keywords | ||
| Normal aggregate concrete (NAC); Recycled aggregate concrete (RAC); Normal coarse aggregate (NCA) Recycledcoarseaggregate (RCA); volumetric ratios of steel fiber (vf) | ||
| References | ||
|
[1] N. Lawson, I. Douglas, S. Garvin, C. McGrath, D. Manning, & J. Vetterlein, “Recycling construction and demolition wastes,” Environmental Management and Health, A UK perspective, Vol. 12, No.2, 146-157, 2001. [2] Kumar, B. Sarath Chandra, Vamsi Krishna Varanasi, and P. Saha. “Sustainable development using supplementary cementitious materials and recycled aggregate,” International Journal of Modern Engineering Research (IJMER) 2.1, 165-171, 2012. [3] S.C. Nelson, “High-Strength Structural Concrete with Recycled Aggregates,” University of Southern Queensland, 2004. [4] M. Mulheron “Demolition and Reuse of Concrete and Masonry,” Proc. 2nd International RILEM Symposium, products and standards in the U.K. Proc.Vol.2. Reuse of demolition waste. Japan, 1988. [5] C. S. Poon, D .Chan, “The Use of Recycled Aggregate in Concrete in Hong Kong,” Resources Conservation & Recycling, 2006. [6] P. Lindsell, M. Mulheron “recycling of demolition debris,” A report for the Institute of Demolition Engineering, University of Oxford, Oxford UK, p, 233, 1985. | ||
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