Temat: alkali-activated - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A review on mineral waste for chemical-activated binders: mineralogical and chemical characteristics
Autorzy:: Sedira, N.
Castro-Gomes, J.
Kastiukas, G.
Zhou, X.
Vargas, A.
Powiązania:: https://bibliotekanauki.pl/articles/89164.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: mineral waste
mining waste
alkali activated materials
alkaline solutions
chemical composition
Opis:: This review discusses the potential of alkali-activated materials obtained from mineral waste. A brief historical background on alkali-activated materials is presented. Recent advances in the development of binders obtained from mineral wastes and alkali-activated solutions are described. The scope of this state of the art review is to identify current knowledge in support that mineral waste can be used for the production of alkali-activated binders. In addition, this review identifies the chemical activators that can be effectively utilized for such purposes in the age when wastes are still viewed by industry as dis-posable. Some mineral wastes which are discussed can be viewed as a new resource for recycling and recovery which will offer important economic and social benefits.
Źródło:: Mining Science; 2017, 24; 29-58
2300-9586
2353-5423
Pojawia się w:: Mining Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Feasibility of alkali-activated mining waste foamed materials incorporating expanded granulated cork
Autorzy:: Beghoura, I.
Castro-Gomes, J.
Ihsan, H.
Estrada, N.
Powiązania:: https://bibliotekanauki.pl/articles/88897.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: mining waste mud
alkali activated materials
expanded cork
foamed materials
porosity
Opis:: Different combinations of mining waste mud, grounded waste glass, Portland cement, metakaolin and expanded cork were mixed together with alkaline activators (sodium silicate and sodium hydroxide solution) and as well aluminum powder or hydrogen peroxide to produce foamed lightweight materials. The size of the mineral materials is under 500 µm and expanded cork particles size is between 2 to 4 mm. The expanded cork added to the mixes changed between 10 to 40% volume of total solids. The influence of expanded cork on compressive strength was investigated. Precursors and activators were mixed together to produce a homogeneous mixture, which was placed into a cubic mold (40 x 40 x 40 mm³), and cured at a temperature of 60°C, for 24 hours. After curing process, samples without foaming agents achieved the maximum compressive strength of 14.7 and 19.5 MPa for 7 and 28 days respectively. The porosity was observed by the naked eye of large voids in a range of 4 mm in size. Microstructure analyses were carried on by SEM. Samples made with aluminum powder showed higher volume increase about 358% compared with samples made with hydrogen peroxide that presented a 141% volume increase. This preliminary study shows the feasibility to produce new improved lightweight foamed alkali activated materials incorporating expanded cork with potential applications in artistic, architectural, and historical heritage restoration.
Źródło:: Mining Science; 2017, 24; 7-28
2300-9586
2353-5423
Pojawia się w:: Mining Science
Dostawca treści:: Biblioteka Nauki

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