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    Preparation Conditions for the Synthesis of Alkali-Activated Binders Using Tungsten Mining Waste

    Source: Journal of Materials in Civil Engineering:;2017:;Volume ( 029 ):;issue: 010
    Author:
    Gediminas Kastiukas
    ,
    Xiangming Zhou
    ,
    João Castro-Gomes
    DOI: 10.1061/(ASCE)MT.1943-5533.0002029
    Publisher: American Society of Civil Engineers
    Abstract: This study evaluated the results of preparation conditions for the production of an alkali-activated binder (AAB) based on a binary mixture of tailings from tungsten mine waste (TMW), and waste glass (WG) activated with a mixture of sodium silicate (SS) and sodium hydroxide (SH). A 40% by weight WG increased the amorphous nature of the binary blend by 21% without initiating the alkali-silica reaction. The SS-SH activator solution was subjected to a variation of mixing times, and its sensitivity was measured using temperature monitoring and Fourier transform infrared spectroscopy (FTIR). After 20 min of mixing, the SS-SH activator solution showed a 3.13°C reduction in temperature and a 21.4% increase in unbound water content, and as a result imparted a 26% drop in the mechanical strength of TMW-WG AAB at 28 days. The TMW-WG AAB was also determined to develop the highest compressive strength when cured at 80°C for 24 h in sealed conditions. The following conditions, supported by X-ray diffraction (XRD) and FTIR, are responsible for the most significant dissolution of the aluminosilicate oxides.
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      Preparation Conditions for the Synthesis of Alkali-Activated Binders Using Tungsten Mining Waste

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4237628
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    contributor authorGediminas Kastiukas
    contributor authorXiangming Zhou
    contributor authorJoão Castro-Gomes
    date accessioned2017-12-16T09:01:53Z
    date available2017-12-16T09:01:53Z
    date issued2017
    identifier other%28ASCE%29MT.1943-5533.0002029.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4237628
    description abstractThis study evaluated the results of preparation conditions for the production of an alkali-activated binder (AAB) based on a binary mixture of tailings from tungsten mine waste (TMW), and waste glass (WG) activated with a mixture of sodium silicate (SS) and sodium hydroxide (SH). A 40% by weight WG increased the amorphous nature of the binary blend by 21% without initiating the alkali-silica reaction. The SS-SH activator solution was subjected to a variation of mixing times, and its sensitivity was measured using temperature monitoring and Fourier transform infrared spectroscopy (FTIR). After 20 min of mixing, the SS-SH activator solution showed a 3.13°C reduction in temperature and a 21.4% increase in unbound water content, and as a result imparted a 26% drop in the mechanical strength of TMW-WG AAB at 28 days. The TMW-WG AAB was also determined to develop the highest compressive strength when cured at 80°C for 24 h in sealed conditions. The following conditions, supported by X-ray diffraction (XRD) and FTIR, are responsible for the most significant dissolution of the aluminosilicate oxides.
    publisherAmerican Society of Civil Engineers
    titlePreparation Conditions for the Synthesis of Alkali-Activated Binders Using Tungsten Mining Waste
    typeJournal Paper
    journal volume29
    journal issue10
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0002029
    treeJournal of Materials in Civil Engineering:;2017:;Volume ( 029 ):;issue: 010
    contenttypeFulltext
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