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http://dx.doi.org/10.14346/JKOSOS.2014.29.4.123

A Study on the Automatic Measurement of Solid Content in Recycled Water in Ready Mixed Concrete Plant  

Choi, Young-Cheol (Korea Comformity Laboratories)
Moon, Gyu-Don (Korea Comformity Laboratories)
Cho, Bong-Seok (Research institute of Industrial Science & Technology)
Publication Information
Journal of the Korean Society of Safety / v.29, no.4, 2014 , pp. 123-131 More about this Journal
Abstract
Whole amount of waste water, approximately 921.6 liter, for cleaning a ready mixed concrete truck should be used to produce concrete as a mixing water or cleaning water. Recycling water for concrete mixing contains solids, which cause decrease in slump, air and compressive strengths, so it may influence on poor concrete quality. Therefore, it has been maintained to use recycling water with less than 3 percent of solids. Since no evaluation system has been constructed to directly reflect on variability of recycling water from ready mixed concrete plants, it is necessary to develop "Automatic recycling solid measuring system" for quality controls in real time. In this research, sensors measuring waste water concentration in ultrasonic and inductance methods were developed, and automatic system using the sensors were established. The accuracy of measurement sensors developed for recycling water based on various conditions of concentration was proved, and application limits were evaluated. Also, concentration of recycling water using sensors developed from ready mixed concrete plant was measured, and curing method verified the accuracy of the sensors. Moreover, measurement sensors for recycling water in various locations were installed to evaluate the effects on measuring method and spots. The automatic measuring system for recycling water concentration, which is developed in the research, will contribute to improve concrete quality safety through reliable solids maintenance.
Keywords
recycled water; solid content measurement; ready mixed concrete; quality control;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Franco Sandrolini, "Waste Wash Water Recycling in Ready-mixed Concrete Plants", Cement and Concrete Research, Vol 31, Issue 3, pp. 485-489, 2001.   DOI
2 Korean Standards Association, "KS F 4009 Ready-mixed Concrete", 2011.
3 G. C. Lee, "Investigation on the Recycling Water of Ready Mixed Concrete Solid Content Management Method", Journal of the Recycled Construction Resources Institute, Vol. 09, No.2, pp. 119-122, 2009.
4 Korea Concrete Institute, "Plant Equipments of Readymixed Concrete and Quality of Concrete", pp. 119-125, 2004.
5 K. J. Lee, "Property of Concrete by The Recycling Water of Ready Mixed Concrete Plant", KCI, pp. 67-68. 2010.
6 S. R. Woo, "An Experimental Study on the Reuse of Recycling Water of Ready Mixed Concrete Such as Concrete Water(1)-Part 1: The Mechanical Properties of Mortar with the Water Kinds and Sludge Content", KCI, Vol 13. No 1, pp. 379-382, 1993
7 S. R. Woo, "An Experimental Study on the Reuse of Recycling Water of Ready Mixed Concrete Such as Concrete Water(2)-Part 2 : The Mechanical Properties of Mortar with Mixing Proportion and Open Time of Recycling Water", KCI, Vol. 13. No. 1, pp .383-386, 1993.
8 N. Su, B. Miao and F. Liu, "Effect of Wash Water and underground Water on Properties of Concrete", Cement and Concrete Research 32, pp.777-782, 2002.   DOI
9 Japanese Industrial Standards Committee, "JIS A 5308 Ready-mixed Concrete", 2014.
10 J. Borger, R.L. Carrasquillo and D.W. Fowler, "Use of Recycled Wash Water and Returned Plastic Concrete in the Production of Fresh Concrete", Adv.Cem. Based Mater., pp. 267-274, 1994.
11 Y. C. Choi, "Microwave Moisture Measurement of Fine Aggregate in RMC Industry", Journal of the Korean Society of Safety, Vol. 27, No. 1, pp. 63-69, 2012.   과학기술학회마을