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The Study on the Physical and Strength Properties of Lightweight Concrete by Replacement Ratio of Artificial Lightweight Aggregate

인공경량골재 혼합비율에 따른 경량 콘크리트의 물성 및 강도특성에 관한 연구

Choi, Se-Jin;Kim, Do-Bin;Lee, Kyung-Su;Kim, Young-Uk
최세진;김도빈;이경수;김영욱

  • Received : 2019.04.20
  • Accepted : 2019.07.04
  • Published : 2019.08.20

Abstract

This study is to compare and analyze the physical and strength properties of lightweight concrete using domestic lightweight aggregate by replacement ratio of artificial lightweight fine and coarse aggregate after considering low cement mixture and pre-wetting time. The slump, unit weight, compressive strength and split tensile strength of lightweight concrete with domestic lightweight aggregate were measured. As test results, the slump of lightweight concrete by replacement ratio of lightweight fine aggregate increased as the replacement ratio of lightweight fine aggregate increased. The unit weight of lightweight concrete using 100% of lightweight fine aggregate was about 10.4% lower than that of the lightweight concrete with natural sand. In addition, the unit weight of lightweight concrete by replacement ratio of lightweight coarse aggregate increased with the increase of the ratio of LWG10(5~10mm). The compressive strength of lightweight concrete with lightweight fine and coarse aggregate increased as the replacement ratio of lightweight fine aggregate increased. The compressive strength of lightweight concrete with natural sand and LWG10 was 30 to 31MPa regardless of the replacement ratio of the lightweight coarse aggregate after 7 days.

Keywords

low cement;artificial lightweight aggregate;lightweight concrete;unit weight;compressive strength

Acknowledgement

Supported by : Wonkwang University