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http://dx.doi.org/10.4334/JKCI.2011.23.6.817

A Study on the Performance Improvement and Long-Term Strength Properties of Eco-cement Concrete  

Park, Kwang-Min (Dong Yang Structural Engineers, Research Institute of Structural Engineering & System)
Lee, Gun-Cheol (Waterproofing & Corrosion Protection Technology Team, Korea Conformity Laboratories)
Publication Information
Journal of the Korea Concrete Institute / v.23, no.6, 2011 , pp. 817-826 More about this Journal
Abstract
Concrete using eco-cement has a problem with long-term strength development. However, currently, a long-term strength development mechanism is not confirmed, resulting in a lack of application of eco-cement in construction fields. In this study, the curing humidity influence on development in long-term strength of concrete using eco-cement and the relationship between strength and pore structure were examined. The results showed that wet cured eco-cement with a high water/cement ratio showed serious long-term strength reduction due to non-reduction of pore volume (pore size over 10 nm) in mortar caste with eco-cement. Also, the study results on improvement of long-term strength of eco-cement by partial replacement with ordinary portland cement and finely-ground fly ash showed that both of these alternatives improved long-term strength of concrete caste with eco-cement due to gradual refinement of their micro-structure.
Keywords
eco-cement; fly ash; improvement in strength; pore structure;
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