Properties of Concrete with Waste Roof Tiles as Fine Aggregate

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  • 廃瓦を細骨材として用いたコンクリートの物性
  • ハイガ オ サイコツザイ ト シテ モチイタ コンクリート ノ ブッセイ

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Abstract

In order to investigate the application of waste roof tiles to fine aggregate for concrete, two kinds of waste roof tiles having different quality are selected. One is waste roof tile which is manufactured in Shimane prefecture and has been used long in Tottori city. The other is waste roof tile which is manufactured in Awaji Island and has been used long in this place. In this paper, the tests including drying shrinkage and freeze-thaw test for fresh concrete and hardened concrete are conducted and the properties are compared and examined with those of concrete with normal sand. <br>The test results show that the dosage of a retardar type of air-entraining high-range water reducing agent required to attain the given slump when the waste roof tiles are used as fine aggregate for concrete. The fundamental properties of concrete with waste roof tiles such as slump and air loss with time, bleeding, setting time, compressive strength and drying shrinkage are almost the same as those of concrete with normal sand. However, the freeze-thaw resistance of concrete with waste roof tiles drop away compared to that of concrete with normal sand.

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