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http://dx.doi.org/10.14190/JRCR.2022.10.4.435

A Study on Comparison of Density Test Methods for Quality Control of Cement and Mineral Admixture  

Jae-Seung, Lee (Smart Construction Materials Center, Korea Conformity Laboratories)
Sang-Kyun, Noh (Smart Construction Materials Center, Korea Conformity Laboratories)
Cheol, Park (Technology Research Center, Ssangyong C&E)
Hong-Chul, Shin (Smart Construction Materials Center, Korea Conformity Laboratories)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.4, 2022 , pp. 435-442 More about this Journal
Abstract
In this study, the density of KS L 5110 was compared with that of gas pycnometer and electronic densimeter for efficient density management of cement, blast furnace slag powder and fly ash. Correlation and usability according to the test method were reviewed, and based on the results of the experiment, the availability of alternative test methods was analyzed. As a result of the density test according to test methods, the density of cement, blast furnace slag powder and fly ash tended to decrease in the order of gas pycnometer, KS L 5110 and electronic densimeter. Because the volume range of the sample to be evaluated is different depending on test methods. The coefficient of determination R2 was in the range of 0.71 to 0.93, and the correlation according to test methods showed a relatively good correlation. If correction is applied through correlation, it is analyzed that alternative test methods can be used. As a result of the usability review considering the test procedure, measurement time and coefficient of variation, the gas pycnometer had the simplest test procedure and good reliability. In addition, it is expected that the reproducibility between the testers is relatively high because the skill is not greatly required.
Keywords
Cement; Mineral admixture; Quality control; Density; Test method;
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