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http://dx.doi.org/10.14190/JRCR.2022.10.3.269

Experimental Study on the Setting Time and Compressive Strength of Nano-Micro Pozzolanic Binders as Cement Composites  

Kim, Won-Woo (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Yang, Keun-Hyeok (Department of Architectural Engineering, Kyonggi University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.3, 2022 , pp. 269-275 More about this Journal
Abstract
In this study, the setting time and compressive strength of cement paste composites applied with nano-micro pozzolanic binders were experimental analyzed. The pozzolanic binder was reduced initial and final setting time and the compressive strength was increased. Micro silica was effective in decrease the initial setting and final setting time and impressing the compressive strength. When two or more cement binders were used, the using of silica fume and a small amount of nano silica at reduced the setting time to 62-64 % to OPC cement and the compressive strength was increased to 117 %. A small amount of mixing the nano silica was effect to pore filling and pozzolanic activation. However, the addition of a chemical admixture should be considered when mixing table design because pozzolanic binders high specific surface area causes a decrease in cement composites flow.
Keywords
Pozzolanic binder; Nano silica; Micro silica; Setting time;
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