| publication name | CHARACTERISTICS AND DURABILITY OF ALKALI ACTIVATED SLAG-MICROSILICA PASTES SUBJECTED TO SULPHATE AND CHLORIDE IONS ATTACK |
|---|---|
| Authors | MOHAMED HEIKAL*, **, SAHAR M. IBRAHIM* |
| year | 2015 |
| keywords | Alkaline activation, Mechanical properties, Electrical conductivity, Thermogravimetric analysis (TGA), Electron microscopy (SEM) |
| journal | Ceramics – Silikáty |
| volume | 59 |
| issue | 2 |
| pages | 81-89 |
| publisher | Elseiver |
| Local/International | International |
| Paper Link | https://l.facebook.com/l.php?u=http%3A%2F%2Fwww.ceramics-silikaty.cz%2Findex.php%3Fpage%3Dcs_content_doi%26id_cislo%3D11%26fbclid%3DIwAR1xMVFTmTcmI5yt86bcfGncxRLwnGVIEOPzrAVFTveblaC2ASpQor6Pz5M&h=AT3BLisoeHNcr_pklW1c5EWo22QkhidCJoVoY92bWHhwYSSm1F0tnGOq8B6IzN029xmXp-kGKNylmbcPbI1ZD9JDDZpYb1bW9eLnsqCSCc8rQcTFqHG5QdflSudqBJbSlFk-Tw |
| Full paper | download |
| Supplementary materials | Not Available |
Abstract
This research aims to produce cementless eco-friendly binding material using alkaline activation of blast-furnace slag (GBFS) and microsilica (MS). The preparation of cementless binding material was conducted with different GBFS-MS mass ratios (100:0; 98:2; 96:4; 92:8) with 0.75:0.50; Na2 O:SiO2mol kg-1 of GBFS-MS. The characteristics and durability of alkali activated GBFS and MS mixes were studied. Chemically combined water, combined slag contents as well as compressive strength increase with MS up to 4 mass %, then decreases with MS up to 8 mass %. Increase of MS content up to 8 mass %, the compressive strength shows a lower values at early ages (3-14 days). But, at later age up to 28-90 days, the compressive strength values increase. SEM micrographs show the presence of C–S–H and (N,C)–A–S–H gel with low porosity. The alkali activated GBFS-MS pastes are more durable in 5 % MgSO4 or 5 % MgCl2 solution than ordinary Portland cement (OPC) up to 180 days.