Utilization Iron Filings and Microwave Heating in Roughening the Surface of Smoothed Coarse Aggregates
Keywords:Coarse aggregate, Compressive strength, Iron filings, Microwave, Tensile strength, Texture.
Properties of coarse aggregate such as texture have a significant influence on the performance of fresh and hardened concrete. A smooth surface can enhance workability, yet a rougher one offers a stronger bond between aggregate and paste, resulting in higher strength. This research aims to roughen the texture of white smoothed aggregate by using cement-iron filings mortar with the aid of microwave maturation to accelerate the adhesion process of mortar-aggregate surface. The mortar was prepared by mixing an equal weight of cement and iron filings, of a particular size, with sand. Four different periods (2, 4, 6 and 8 mints.) of microwave treatment in addition to water curing were considered plus one reference mortar which cured in only air for 24 hrs. The treated aggregate was then used for casting concrete specimens with a w/c ratio of 0.5 in which their properties being determined by means of density, compressive and tensile strengths observations. The main findings revealed that the concrete specimens contained microwave treated aggregate attained higher compressive strength compared with those treated in the air. Data also showed that concrete specimens with microwave treated aggregate possess better tensile properties as a consequence of the improvement in the transition zone.
 Neville AM, Brooks JJ. Concrete Technology. 2nd ed. UK: Pearson Education Ltd.; 2010.
 Yeggoni M, Button JW, Zollinger DG. Influence of coarse aggregate shape and surface texture on rutting of hot mix asphalt 1994:148.
 Welsh Assembly Government. Towards zero waste 2010:92.
 Sarsam SI. Influence of nano-materials addition as partial replacement of cement in the properties of concrete pavement 2016;2:1â€“5.
 Ghannam S, Najm H, Vasconez R. Experimental study of concrete made with granite and iron powders as partial replacement of sand. Sustain Mater Technol 2016;9:1â€“9.
 Ismail ZZ, Al-Hashmi EA. Validation of using mixed iron and plastic wastes in concrete. 2nd Int Conf Sustain Constr Mater Technol 2010:393â€“403.
 Ismail ZZ, Al-hashmi EA. Reuse of waste iron as a partial replacement of sand in concrete. Waste Manag 2008;28:2048â€“53.
 Olutoge F, Onugba M, Ocholi A. Strength properties of concrete produced with iron filings as a sand replacement. Br J Appl Sci Technol 2016;18:1â€“6.
 Goyal S, Singh K, Hussain A, Singh PR. Study on partial replacement of sand with iron ore tailing on compressive strength of concrete. Int J Res Eng Adv Technol 2015;3:243â€“8.
 Zhu Z, Li B, Zhou M. The influences of iron ore tailings as a fine aggregate on the strength of ultra-high performance concrete. Adv Mater Sci Eng 2015;2015:1â€“7.
 Tian Z, Zhao Z, Dai C, Liu S. Experimental study on the properties of concrete mixed with iron ore tailings. Adv Mater Sci Eng 2016.
 Alzaed AN. Effect of iron filings in concrete compression and tensile strength. Int J Recent Dev Eng Technol 2014;3:121â€“5.
 Elakkiya K, Uma N, Govandan A. Effect of thermal and microwave oven curing on concrete. Indian Journal Sci Res 2018;17:262â€“7.
 Makul N, Rattanadecho P, Agrawal DK. Applications of microwave energy in cement and concrete - A review. Renew Sustain Energy Rev 2014;37:715â€“33.
 Prommas R, Rungsakthaweekul T. Effect of microwave curing conditions on high strength concrete properties. Energy Procedia 2014;56:26â€“34.
 ASTMComitteeC150. Standard test methods for chemical analysis of hydraulic cement. Annu B ASTM Stand 2007:1â€“8.
 ASTMCommitteeC305. Mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. Annu B ASTM Stand 2007:495â€“7.
 Van Gemert D, Czarnecki L, Maultzsch M, Schorn H, Beeldens A, Åukowski P, et al. Cement concrete and concrete-polymer composites: Two merging worlds: A report from 11th ICPIC Congress in Berlin, 2004. Cem Concr Compos 2005;27:926â€“33.
View Full Article:
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aÂ Creative Commons Attribution Licensethat allows others to share the work with an acknowledgement of the work''s authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal''s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (SeeÂ The Effect of Open Access).