Effect of CO_2 Nanobubble Water on the Fracture Properties of Cemented Backfill Materials under Different Aggregate Fractal Dimensions

カオ, シャオシャオ, 濵中, 晃弘, 島田, 英樹, 笹岡, 孝司

In order to cope with climate change and achieve the goal of carbon neutrality, the use of carbonization technology to enhance the performance of cement-based materials and achieve the purpose of carbon sequestration has become a very promising research direction. This paper considers the use of CO_2NBW as mixing water for cement-based materials, aiming to improve the carbonization efficiency of materials to achieve the goal of carbon neutrality. This time, the effect of CO_2NBW on cementitious filling materials under different aggregate fractal dimensions was studied through uniaxial compression tests and acoustic emission technology. The effect of CO_2NBW on the mechanical properties and crack evolution of the material was discussed. The results showed that CO_2 nanobubbles significantly improved the strength of cemented filling materials under different fractal dimensions, and the uniaxial compressive strength was most significantly improved by 23.04% when the fractal dimension was 2.7824. In addition, the characteristics of acoustic emission ring counts and energy parameters indicate that CO_2 nanobubbles help improve the overall pore structure of the sample, affecting the macroscopic strength. However, the addition of CO_2 nanobubbles reduces the limit energy storage ratio of elastic strain energy, which indicates that excessive CO_2 concentration may affect the hydration reaction of the cementing material.

Effect of CO_2 Nanobubble Water on the Fracture Properties of Cemented Backfill Materials under Different Aggregate Fractal Dimensions

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Effect of CO_2 Nanobubble Water on the Fracture Properties of Cemented Backfill Materials under Different Aggregate Fractal Dimensions

書誌事項

説明

収録刊行物

キーワード

詳細情報 詳細情報について

書き出し

問題の指摘

詳細情報詳細情報について