PERFORMANCE EVALUATION OF MORTAR USING COMPOSITE RECYCLED MATERIALS

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  • LI Chun-He
    UNIVERSITY OF MIYAZAKI, Department of Civil and Environmental Engineering
  • KAMEI Takeshi
    UNIVERSITY OF MIYAZAKI, Department of Civil and Environmental Engineering
  • NAGANO Teruki
    UNIVERSITY OF MIYAZAKI, Department of Civil and Environmental Engineering

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Other Title
  • 複合リサイクル材料を有効利用したモルタルの性能評価

Abstract

The growth of waste and recycled materials in Japan is one of the largest challenges nowadays. It has many economic and environmental benefits for our society. This paper investigates the development of high performance concrete, based on the formation of ettringite, using waste and recycled materials. For this purpose, wants to replace the fine aggregate of part with waste and recycled materials. Cement mixed with ground granulated blast-furnace slag, fly ash, gypsum wastes in varying proportions to obtain the optimal production for ettringite based on their chemical response. Compressive and flexure strength tests are performed on the different admixtures to measure the compressive and flexure strength. Measurement for length change of mortar tests are performed on the different admixtures to measure the length change and drying shrinkage. Scan electron microscope（SEM）are conducted on the samples to explore the formation and intensity of ettringite. The test results show that the admixture of using waste and recycled materials has a significant effect on the strength, length change and drying shrinkage improvement of mortar.

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