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Jun, Yubin
Construction Materials Lab
Research Interests
  • Construction materials
  • Concrete deterioration and durability

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Microstructural verification of the strength performance of ternary blended cement systems with high volumes of fly ash and GGBFS

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Title
Microstructural verification of the strength performance of ternary blended cement systems with high volumes of fly ash and GGBFS
Author
Jeong, YeonungPark, HyeoneunJun, YubinJeong, Jae-HongOh, Jae Eun
Issue Date
2015-10
Publisher
ELSEVIER SCI LTD
Citation
CONSTRUCTION AND BUILDING MATERIALS, v.95, pp.96 - 107
Abstract
Ternary combinations of Portland cement, GGBFS, and fly ash with a typical weight ratio of 4:4:2, respectively, have been widely used for concrete production in South Korea. Recently, to achieve lower heat generation and material costs, the construction society of Korea is investigating the use of a 3:5:2 mixing ratio for construction; however, despite earlier laboratory testing results exhibiting satisfactory mechanical properties, the industry remains reluctant to apply the 3:5:2 mixture because there has been little verification of the microstructural characteristics of the mixture proportions. Therefore, this microstructural study examines the influences of the higher ratio of GGBFS to cement on the microstructure and hydration products to explain the comparable mechanical performances of the ternary mixtures of 3:5:2 and 4:4:2 based on the testing results of powder X-ray diffraction analyses, thermogravimetry, mercury intrusion porosimetry, and scanning electron microscopy with energy dispersive spectroscopy.
URI
https://scholarworks.unist.ac.kr/handle/201301/16573
URL
http://www.sciencedirect.com/science/article/pii/S0950061815301677#
DOI
10.1016/j.conbuildmat.2015.07.158
ISSN
0950-0618
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