Browse > Article
http://dx.doi.org/10.7844/kirr.2016.25.6.29

Effects of Crushed Coal Bottom Ash on the Properties of Mortar with Various Water-to-binder Ratios  

Tafesse, Million (School of Architecture, Chosun University)
Kim, Hyeong-Ki (School of Architecture, Chosun University)
Publication Information
Resources Recycling / v.25, no.6, 2016 , pp. 29-40 More about this Journal
Abstract
Effects of crushed coal bottom ash (CBA) with maximum size of 1 mm on the properties of mortar with various water-to-binder ratios (w/b) were evaluated. The present work is a fundamental study to establish a method of mix proportion design for mortar and concrete with CBA. The workability, air contents, and compressive strength of mortar were measured. Efficiency of CBA on the compressive strength at 28 days, which was adopted for mix proportion design, was evaluated based on concepts of 'equivalent strength' in CEN/TR 16637. It was found that the CBA could be contributed as a binder in mortar in some cases, while in other cases act as at aggregates. The efficiency of CBA was influenced by types of CBA and their replacement ratio, and w/b of mortar.
Keywords
Cruched coal bottom ash; mortar; equivalent compressive strength; efficiency coefficient; k-value; mix proportion design; water-to-binder ratio;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Kim, H.K., Lee, H.K., 2015: Coal bottom ash in field of civil engineering: A review of advanced applications and environmental considerations, KSCE Journal of Civil Engineering, 19(6), pp. 1802-1818.   DOI
2 Kim, K.G., Kim, D.Y., Lee, S.W., 2015: A study on the locational conflicts of thermal power plants - Focused on the construction agreement processes for thermal power plants, Korean Journal of Local Government & Administration Studies, 29(1), pp. 21-44.   DOI
3 Korean Recycled Construction Resource Institute, 2014: State-of-art and future technologies on recycled construction resources, Technical report of KRCRI, pp. 464-465. (In Korean)
4 Korea South-East Power Co., 2016: Annual report on ash recycle, Open API (http://www.koenergy.kr/kosep/fr/main.do)
5 Andrade, L. B., Rocha, J. C., and Cheriaf, M., 2009: Influence of coal bottom ash as fine aggregate on fresh properties of concrete, Construction and Building Materials, 23(2), pp.609-614.   DOI
6 Kim, H.K., 2015a: Properties of normal-strength mortar containing coarsely-crushed bottom ash considering standard particle size distribution of fine aggregate, Journal of the Korea Concrete Institute, 27(5), pp. 531-539.   DOI
7 Kim, H.K., 2015b: Utilization of sieved and ground coal bottom ash powders as a coarse binder in high-strength mortar to improve workability, Construction and Building Materials, 91, pp. 57-64.   DOI
8 CEN/TR 16639, 2014: Use of k-value concept, equivalent concrete performance concept and equivalent performance of combinations concept, CEN/TC104.
9 KS L 5405, 2016: Fly ash, ICS Code 91.100.10; 91.100.50,Korean Agency for Technology and Standards
10 KS F 4570, 2012: Bottom ash aggregate for precast concrete products, ICS Code 91.100.30,Korean Agency for Technology and Standards
11 Papadakis, V.G., Tsimas, S., 2002: Supplementary cementing materials in concrete: Part I: efficiency and design, Cement and Concrete Research, 32(10), pp. 1525-1532.   DOI
12 Babu, K.G., Kumar, V.S.R., 2000: Efficiency of GGBS in concrete, Cement and Concrete Research, 30(7), pp. 1031-1036.   DOI
13 Yoon, H.S., Yang, K.H, 2015: Determination of water-to-binder ratios on the equivalent compressive strength of concrete with supplementary cementitious materials, 27(6), pp. 687-693.   DOI