Durability of new recycled granite quarry dust-bearing cements
Cements prepared to new designs in which different types of waste are used as additions must be testedfor mechanical strength and durability to ensure their performance will be satisfactory throughout theirservice life. This study explored the effect of adding 10% or 20% granite quarry dust to cemen...
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2018 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/173790 |
| Acesso em linha: | http://hdl.handle.net/10261/173790 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Transport Dimensional stability |
| Resumo: | Cements prepared to new designs in which different types of waste are used as additions must be testedfor mechanical strength and durability to ensure their performance will be satisfactory throughout theirservice life. This study explored the effect of adding 10% or 20% granite quarry dust to cement onproperties such as transport (total and capillary water absorption and electrical resistivity), dimensionalstability (drying shrinkage and expansion), the alkali-silica reaction, heat of hydration and colour. Noalkali-silica reaction was observed in the new materials and expansion and contraction were less intensethan in conventional cement. The water absorption and capillary absorption coefficients rose less in theadditioned cements than the replacement ratio, whilst their higher resistivity values afforded greatercorrosion protection than found in the reference. The inclusion of this waste also prompted a rise in light-ness and a decline in peak heat of hydration. The multivariate analysis of variance (MANOVA) conductedshowed that the factors time and replacement ratio affected the properties significantly, whereas thecombined effect of the two was statistically significant or otherwise depending on the property analysed.The findings showed that the partial replacement of cement with quarry dust is not detrimental to pro-duct durability and the recycled material qualifies as a strength class 42.5, type II/A binder. The materialsbearing 20% granite quarry dust, in turn, were found to meet the requirements to qualify as low heatcements (CEM II/A LH). |
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