Effects of Copper Slag as a Replacement for Fine Aggregate on the Behavior and Ultimate Strength of Reinforced Concrete Slender Columns

AS Alnuaimi

Abstract


Use of copper slag (CS) as a replacement for fine aggregate (FA) in RC slender columns was experimentally investigated in this study. Twenty columns measuring 150 mm x150 mm x 2500 mm were tested for monotonic axial compression load until failure. The concrete mixture included ordinary Portland cement (OPC) cement, fine aggregate, 10 mm coarse aggregate, and CS. The cpercentage of cement, water and coarse aggregate were kept constant within the mixture, while the percentage of CS as a replacement for fine aggregate varied from 0 to 100%. Four 8 mm diameter high yield steel and 6 mm mild steel bars were used as longitudinal and transverse reinforcement, respectively. Five cubes measuring 100 mm x100 mm x100 mm, eight cylinders measuring 150 mm x 300 mm and five prisms measuring 100 mm x 100 mm x 500 mm were cast and tested for each mixture to determine the compressive and tensile strengths of the concrete. The results showed that the replacement of up to 40% of the fine aggregate with CS caused no major changes in concrete strength, column failure load, or measured flexural stiffness (EI). Further increasing the percentage reduced the concrete strength, column failure load, and flexural stiffness (EI), and increased concrete slump and lateral and vertical deflections of the column. The maximum difference in concrete strength between the mixes of 0% CS and 100% CS was 29%, with the difference between the measured/ control failure loads between the columns with 0 and 100% CS was 20% the maximum difference in the measured EI between the columns with 0 and 100% CS was 25%. The measured to calculated failure loads of all specimen varied between 91 and -100.02%. The measured steel strains were proportional to the failure loads. It was noted that columns with high percentages of CS (


Keywords


Copper slag, Fine aggregate, Column, Axial load, Slender column

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References


Al-Jabri KS, Hisada M, Al-Oraimi SK, Al-Saidy AH (2009a), Copper slag as sand replacement for high performance concrete. Cement and Concrete Composites 31:483-488.

Al-Jabri KS, Hisada M, Al-Saidy AH, Al-Oraimi SK (2009b), Performance of high strength concrete made with copper slag as fine aggregate. Construction and Building Materials 23:2132- 2140.

Alnuaimi AS (2009), Use of copper slag as replacement to fine aggregate in RC slender columns. The Fourth International Conference on Computational methods and experiments in material characterization, MC'09, New Forest, UK.

Alter H (2005), The composition and environmental hazard of copper slags in the context of the basel Convention. Resources, Conservation and Recycling 43:353-360.

ASTM C192 (1998), Standard practice for making and curing concrete test specimens in the laboratory. West Conshohocken, PA: ASTM international, USA.

ASTM C39 (1986), Test for compressive strength of cylindrical concrete specimens. ASTM, USA.

BS 1881 (1983), Testing of concrete, Part 102: Method for determination of slump, British Standard Institution UK.

BS 1881 (1983), Testing of concrete, Part 116: Method for determination of compressive strength of concrete cubes. British Standard Institution, BSI, UK.

BS 1881 (1983), Testing of concrete, Part 117: Method for determination of tensile splitting strength, British Standard Institution, BSI, UK.

BS 1881 (1983), Testing of concrete, Part 118: Method for determination of flexural strength, British Standard Institution, BSI, UK.

BS 4449 (2005), Steel for the reinforcement of concrete, Weld able reinforcing steel. Bar, coil and decoiled product. British Standard Institution, BSI, UK.

BS8110:97 (1997), Structural use of concrete, Part-1. Code of Practice for design and construction. section 2, British Standard Institution, London, UK.

Gere JM, Timoshenko SP (1995), Mechanics of Materials. 3rd SI Edition, Chapman & Hall, ISBN 0412368803, ch9.

Gorai B, Jana RK, Premchand (2003), Characteristics and utilization of copper slag - a review. Resources. Conservation and Recycling 39:299- 313.

Khanzadi M, Behnood A (2009), Mechanical properties of high-strength concrete incorporating copper slag as coarse aggregate. Construction and Building Materials 23:2183-2188.

Mosely WH, Bungey JH, Hulse R (1999), Reinforced concrete design. 5th Edition, ISBN 0333739566, ch 4 and ch 6.

Omani standard for fine aggregate OS-2 (1982), Ministry of Commerce and Industry, Directorate General of Specification and Measurements, Oman.

Queneau PB, Cregar DE, May LD (1991), Application of slag technology to recycling of solid wastes. SME Annual Meeting, Denver, CO, USA 02/25-28/91.

Resende C, Cachim P, Bastos A (2008), Copper slag mortar properties. Material Science Forum Trans Tech Publications 587-588:862-86.

Shanmuganathan P, Lakshmipathiraj P, Sriknath S, Nachiappan AL, Sumathy A (2008), Toxicity characterization and long-term stability studies on copper slag from the ISASMELT process. Resources. Conservation and Recycling 52:601- 611.

Shi C, Meyer C, Behnood A (2008), Utilization of copper slag in cement and concrete. Resources, Conservation and Recycling 52:1115-1120.

Shoya M, Sugita S, Tsukinaga Y, Aba M, Tokubasi K (1999), Properties of self-compacting concrete with slag fine aggregates, International conference on "Exploiting Wastes in Concrete. University of Dundee, UK 121-130.

Taha RA, Alnuaimi AS, Al-Jabri KS, Al-Harthy AS (2007), Evaluation of controlled low strength material containing industrial by-product. Building and Environment 42:3366-3372.

Wu W, Zhang W, Ma G (2010), Optimum content of copper slag as fine aggregate in high strength concrete. Materials and Design 31:2878-2883.




DOI: http://dx.doi.org/10.24200/tjer.vol9iss2pp90-102

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