Effect of magnesium sulfate on the durability of limestone mortars based on quaternary blended cements
| Autor: | Benchaa Benabed, S. Aggoun, M. Bederina, El-Hadj Kadri, Z. Makhloufi |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Magnesium Metallurgy Weight change 0211 other engineering and technologies chemistry.chemical_element 020101 civil engineering 02 engineering and technology Building and Construction Pozzolan 0201 civil engineering law.invention Portland cement chemistry.chemical_compound Compressive strength chemistry Ground granulated blast-furnace slag law 021105 building & construction General Materials Science Composite material Mortar Sulfate |
| Zdroj: | Cement and Concrete Composites. 65:186-199 |
| ISSN: | 0958-9465 |
| DOI: | 10.1016/j.cemconcomp.2015.10.020 |
| Popis: | Currently, the use of blended cements incorporating various supplementary cementing materials, preserved in aggressive environments has become common. This paper describes the investigation results conducted on the evaluation of the resistance to magnesium sulfate solution (MgSO4) of limestone mortars containing simultaneously; limestone filler, blast furnace slag and natural pozzolan. In this study, the deterioration of limestone mortars due to sulfate attack was evaluated by measuring changes in weight, length and compressive strength at the ages of 30, 60, 90, 120 and 180 days of immersion in exposure environments. The X-ray diffraction was also used in order to determine the different mineral phases. It is noteworthy that, the pH variation of the conservation solutions has been monitored during tests. The exposure solution was renewed monthly until the end of tests. The results showed that, the resistance to sulfate attack of mortars made with quaternary binders was better than that of mortars based on ordinary Portland cement. |
| Databáze: | OpenAIRE |
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