Study on the properties of artificial flood-prevention stone made by Yellow River silt
| Autor: | Baomin Wang, Yue Zheng, Hui Liu, Wanzeng Song, Junnan Han, Gaonian Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Pore size
geography geography.geographical_feature_category Carbonation fungi 0211 other engineering and technologies Drainage basin Mineralogy 02 engineering and technology Building and Construction Silt 021001 nanoscience & nanotechnology Compressive strength 021105 building & construction Flood prevention Environmental science General Materials Science Geotechnical engineering 0210 nano-technology Porosity Curing (chemistry) Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 144:484-492 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2017.03.206 |
| Popis: | In the Yellow River Basin, the source of flood-prevention tone is scarce. The purpose of this study is to investigate the feasibility of producing a kind of artificial flood-prevention stone by using Yellow River silt via alkali-activated method. The effects of alkali dosage, slag content and curing age on the compressive strength of artificial flood-prevention stone were studied. The results showed that the specimen made from optimal mix proportion can meet the requirement of flood-prevention stone. The main product in alkali-activated process is C-S-H gel confirmed by microcosmic tests such as SEM/EDS, TG/DTG and so on. CaCO3 is generated by the carbonation of partial C-S-H gel and residual Ca(OH)2. C-S-H gel and CaCO3 have common contribution to strength. In addition, frost resistance of the artificial flood-prevention stone at the age of 90 days was evaluated by freeze-thaw cycle method. The porosity and pore size distribution were tested by Mercury intrusion porosimetry (MIP) to explicate the change before and after freeze-thaw cycle. As a whole, it is feasible to produce artificial flood-prevention stone by using the Yellow River silt. |
| Databáze: | OpenAIRE |
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