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http://dx.doi.org/10.5345/JKIBC.2019.19.1.059

Shrinkage Properties of Blast Furnance Slag Cement Mortar by using Frost-Resistant Accelerator  

Choi, Hyeong-Gil (Graduate School of Architecture, Kyungpook National University)
Lee, Jun-Cheol (Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.19, no.1, 2019 , pp. 59-66 More about this Journal
Abstract
In this study, the effects of blast furnance slag cement and frost-resistant accelerator on shrinkage properties and shrinkage properties of mortar were examined. As a result, the addition of the frost-resistant accelerator to both OPC and BB has a small effect on the flash properties of mortar and the compressive strength increases from the early ages. In addition, when a frost-resistant accelerator is used in excess of the standard usage amount, it is necessary to examine the relationship of the expansion behavior at the early age, especially, between the compressive strength development and the expansion property. And it was confirmed that the addition of the frost-resistant accelerator tended to increase the shrinkage of mortar using the OPC and BB. With the addition of the frost-resistant accelerator, the amount of pores with a diameter of under the 30nm, especially, the amount of pores with a diameter of 20 to 30nm and the amount of pores with an ink-bottle decrease, and the shrinkage increases. And it is considered that a change in the amount this range of pores has a large effect on the shrinkage property.
Keywords
frost-resistant accelerator; blast furnance slag cement; compressive strength; shrinkage property; pore volume;
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