To improve the activity and utilization of recycled powder (RP) obtained from scrap concrete, the effect of mechanical-thermal synergistic activation on the activity of recycled powder and the properties of recycled powder geopolymer (RPG) was investigated in this work. The compressive strength, scanning electron microscope(SEM), X-ray diffraction (XRD), infrared spectroscopy (IR) and mercury intrusion pore measurement (MIP) were used to evaluate the mechanical property and microstructure of RPG, respectively. The optimal compressive strength was obtained when the activation temperature was 750 degrees C and the grinding time was 10 min. The 3-day, 7-day and 28-day compressive strength increased 77.91%, 109.88% and 108.18%, respectively, compared to the untreated recycled powder geopolymer samples. The microstructure analysis showed that the activation effect of single activation mode on the activity of recycled powder was not prominent; however, better properties and denser structure were obtained when the thermal-mechanical activation synergistically work. It is feasible to improve the utilization rate of recycled powder by synergistic activation and the effect is remarkable.
机构:
HBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, EgyptHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
Abdel-Gawwad, H. A.
Vasquez Garcia, S. R.
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Univ Michoacana, Posgrad Ingn Quim, Morelia 58000, Michoacan, MexicoHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
Vasquez Garcia, S. R.
Soltan Hassan, Hassan
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Univ Michoacana, Posgrad Ingn Quim, Morelia 58000, Michoacan, Mexico
Assiut Univ, New Valley Branch, Fac Sci, Geol Dept, Assiut, EgyptHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
机构:
Wuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Cheng, Shukai
Ge, Keyu
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China Railway Bridge Sci Res Inst Co Ltd, Wuhan 430034, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Ge, Keyu
Sun, Tao
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Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Sun, Tao
Shui, Zhonghe
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Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Shui, Zhonghe
Chen, Xuyong
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Wuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Chen, Xuyong
Lu, Jian-Xin
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Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
机构:
HBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, EgyptHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
Abdel-Gawwad, H. A.
Vasquez Garcia, S. R.
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h-index: 0
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Univ Michoacana, Posgrad Ingn Quim, Morelia 58000, Michoacan, MexicoHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
Vasquez Garcia, S. R.
Soltan Hassan, Hassan
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h-index: 0
机构:
Univ Michoacana, Posgrad Ingn Quim, Morelia 58000, Michoacan, Mexico
Assiut Univ, New Valley Branch, Fac Sci, Geol Dept, Assiut, EgyptHBRC, Housing & Bldg Natl Res Ctr, Raw Bldg Mat Res & Proc Technol Inst, Cairo, Egypt
机构:
Wuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Cheng, Shukai
Ge, Keyu
论文数: 0引用数: 0
h-index: 0
机构:
China Railway Bridge Sci Res Inst Co Ltd, Wuhan 430034, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Ge, Keyu
Sun, Tao
论文数: 0引用数: 0
h-index: 0
机构:
Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Sun, Tao
Shui, Zhonghe
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h-index: 0
机构:
Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430074, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Shui, Zhonghe
Chen, Xuyong
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h-index: 0
机构:
Wuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China
Chen, Xuyong
Lu, Jian-Xin
论文数: 0引用数: 0
h-index: 0
机构:
Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R ChinaWuhan Inst Technol, Sch Civil Engn & Architecture, Wuhan 430073, Peoples R China