Browse > Article
http://dx.doi.org/10.5345/JKIBC.2018.18.5.429

Rapid Evaluation Method for OPC Fineness by Hydrometer and Influence of OPC Fineness on Properties of Mortar  

Han, Cheon-Goo (Department of Architectural Engineering, Cheong ju University)
Kim, Young-Tae (Department of Architectural Engineering, Cheong ju University)
Publication Information
Journal of the Korea Institute of Building Construction / v.18, no.5, 2018 , pp. 429-437 More about this Journal
Abstract
The aim of the research is to analyze a feasibility of rapid evaluation method for cement fineness by the relation analysis between density measurement using hydrometer and fineness of ordinary Portland cement. Additionally, based on the commercially available cement product, relation between a series of fundamental properties of cement mortar and fineness of cement powder was analyzed. As an experimental result, the actually measured fineness value of cement powder showed a good correlation with the fineness value obtained by hydrometer while there was poor correlation with the fineness value on specification. Especially, the density measurement in three minutes showed the closest relation with cement powder fineness, thus rapid quality evaluation of cement powder can be possible by using the regression equation obtained from the three minutes density measurement. Additionally, there was a high relation between cement powder fineness with a fundamental properties of the cement mortar such as fluidity, air content, setting time, and strength development.
Keywords
ordinary portland cement; fineness; hydrometer; acquisition inspection; ready-mixed concrete plant;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Korean Agency for Technology and Standards. KS F 4009 Ready-Mixed Concrete. 2016. 2 p.
2 Lee JJ, Kim, MS, Moon BR, Lee JH, Han MC, Han CG. Influence of the blaine fineness in the certificate of analysis from manufacturer on fresh properties of cement mortar. Proceedings of the Korea Concrete Institute; 2017 Nov 11; Grand Hotel, Andong, Korea, Seoul (Korea): Korea Concrete Institute; 2015. p. 441-2.
3 Han CG. Study on the early estimation of concrete strength [Dissertation]. [Seoul (Korea)]: Chungnam National University; 1988. 251 p.
4 Song HH, Han CG. Analysis of evaluation possibility of fly ash fineness using hydrometer. Journal of the Korea Institute of Building Construction. 2017 Apl;17(2):119-25.   DOI
5 Joo EH, Han CG. Feasibility analysis of rapid quality evaluation method for blast furnace slag using hydrometer. Journal of the Korean Recycled Construction Resources Institute. 2018 Mar;6(1):43-9.   DOI
6 Lee JJ, Hyeon SY, Moon BR, Kim YT, Han MC, Han CG. The effect of solution variables and numbers of cylinders spinning in the rapid evaluation of cement powder by hydrometer method, Proceedings of the Korea Concrete Institute; 2017 May 5; Phoenix Island, Jeju, Korea, Seoul (Korea); Korea Concrete Institute; 2017. p. 127-36.
7 Lee JJ, Kim MS, Moon BR, Kim YT, Han MC, Han CG. Influence of various powder of OPC received in concrete plant on strength characteristics of cured mortar. Proceedings of the Korea institute of building construction; 2017 Nov 11; Korea Maritime and Ocean University, Busan, Korea, Seoul (Korea); The Korea institute of building construction; 2017. p. 167-8.
8 Moon BR, Baek C, Lee JJ, Kim YT, Han MC, Han CG. Quality evaluation possibility analysis of fineness OPC by hydrometer. Proceedings of the Korea Concrete Institute; 2016 Nov 11; Daemyungresort, Goseong, Korea, Seoul (Korea); Korea Concrete Institute; 2016. p. 575-6.