Chloride Binding Capacity and Its Effect on the Microstructure of Mortar Made with Marine Sand
| Autor: | Feng Qu, Jizhou Duan, Tao Tao, Ming Sun, Gongxun Wang, C. Sun, Peng Zhang, Yantao Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chloride binding
Curing (food preservation) Diffusion microstructure Geography Planning and Development marine sand 0211 other engineering and technologies TJ807-830 Salt (chemistry) 02 engineering and technology Management Monitoring Policy and Law TD194-195 Chloride Renewable energy sources 021105 building & construction medicine GE1-350 Cement chemistry.chemical_classification Aggregate (composite) Environmental effects of industries and plants Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Microstructure Environmental sciences chemistry mortar Mortar 0210 nano-technology medicine.drug Nuclear chemistry |
| Zdroj: | Sustainability Volume 13 Issue 8 Sustainability, Vol 13, Iss 4169, p 4169 (2021) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13084169 |
| Popis: | Chloride binding capacity and its effect on the microstructure of mortar made with marine sand (MS), washed MS (WMS) and river sand (RS) were investigated in this study. The chloride contents, hydration products, micromorphology and pore structures of mortars were analyzed. The results showed that there was a diffusion trend for chloride ions from the surface of fine aggregate to cement hydrated products. During the whole curing period, the free chloride content in the mortars made by MS and WMS increased firstly, then decreased and stabilized finally with time. However, the total chloride content of three types of mortar hardly changed. The bound chloride content in the mortars made by MS and WMS slightly increased with time, and the bound chloride content included the MS, the WMS and the RS arranged from high to low. C3A·CaCl2·10H2O (Friedel’s salt) was formed at the early age and existed throughout the curing period. Moreover, the volume of fine capillary pore with a size of 10–100 nm increased in the MS and WMS mortar. |
| Databáze: | OpenAIRE |
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