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http://dx.doi.org/10.5345/JKIBC.2016.16.2.097

Engineering Character of Ultra Rapid Hardening Concrete-Polymer Composite using CAC and Gypsum Mixed CAC  

Koo, Ja Sul (Technical Research Center, Tong Yang Cement & Energy Corp.)
Yoo, Seung Yeup (Technical Research Center, Tong Yang Cement & Energy Corp.)
Kim, Jin Man (Dept. of Architectural Engineering, Kongju National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.16, no.2, 2016 , pp. 97-105 More about this Journal
Abstract
Recently, application case of the ultra rapid hardening concrete-polymer composite(URHCPC) are increasing to repair for the deterioration of pavement. But it is a major disadvantage that the main material is expensive and has environmental load. For these reasons, the development of the economic, eco-friendly materials is needed. Calcium Aluminate Composite (CAC), produced by rapid cooling of atomizing method with molten ladle furnace slag, is a material capable of improving the economic feasibility and reducing the environmental load of URHCPC. In this paper, the properties of CAC and gypsum mixed CAC (GC) as alternative materials of RSC according to the types of polymer dispersion were studied. The results were as follows; compressive strength, tensile strength, flexural strength, bonding strength and modulus of elasticity of the composites using CAC or GC showed higher values than those of plain proportion in 3 hour. In later age, they were at the same level as the general proportions. URHCPC using BPD as polymer dispersion had superior strength properties generally. But modulus of elasticity was the same level as the case of using a SBR latex. According to these results, CAC or GC can partially substituted for RSC to product the URHCPC. When URHCPC uses the BPD as the polymer dispersion, it can be improved performance.
Keywords
concrete-polymer composite; regulated set cement; calcium aluminate composite; gypsum mixed calcium aluminate composite;
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