Filler Effect in Shotcrete
| Autor: | Isabel Galan, Lukas Briendl, Wolfgang Kusterle, Florian Roman Steindl, Rudolf Röck, Florian Mittermayr, Maria Thumann |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Ettringite
Materials science Aluminate 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology mechanical properties lcsh:Technology Article chemistry.chemical_compound caco3 Aluminium 021105 building & construction General Materials Science lcsh:Microscopy lcsh:QC120-168.85 Cement lcsh:QH201-278.5 lcsh:T Metallurgy Slag acceleration CaCO3 021001 nanoscience & nanotechnology Shotcrete Silicate chemistry lcsh:TA1-2040 visual_art visual_art.visual_art_medium lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering Cementitious lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 hydration |
| Zdroj: | Materials Materials, Vol 12, Iss 19, p 3221 (2019) Volume 12 Issue 19 |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma12193221 |
| Popis: | The effects of fine limestone powder on the early hydration of cementitious systems accelerated by means of alkali-free aluminum sulfate based products, commonly used for shotcrete applications, were investigated in the course of laboratory and real scale tests. In binary (CEM I + limestone) and ternary (CEM I + limestone + slag) systems the addition of fine limestone led to an enhancement of the hydration degree and strength development at early times (< 24 h). The formation of ettringite, aluminate hydrates, and C&ndash S&ndash H is affected by the joint action of the setting accelerator and the fine limestone. Accelerator and limestone, in combination with the cement, can be optimized to enhance ettringite and silicate reaction, in some cases coupled with aluminate reaction inhibition, to produce mixes suitable for sprayed concrete applications. Such optimization can help to reduce the cement content in the mixes without compromising the early strength development of the shotcrete. |
| Databáze: | OpenAIRE |
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