Effect of the chemical attack on the properties of cimentititous composites with partial substitution of ash from sugar cane bagasse in natura
| Autor: | Carolina Coelho Martuscelli, João Pedro Lages Rodrigues, Ugo Nogueira Castañon, Gabriel Mendes Abreu, Islane Santos, Verônica Christina Corrêa Alves, Clareana Gusmão Ramos |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Waste management Sugar cane 0211 other engineering and technologies General Physics and Astronomy 020101 civil engineering 02 engineering and technology General Chemistry mechanical properties sugarcane bagasse ashes Partial substitution Pulp and paper industry composites chemical attack 0201 civil engineering 021105 building & construction Reutilization of waste General Materials Science Chemical attack Bagasse |
| Zdroj: | Matéria (Rio de Janeiro), Volume: 22, Issue: 2, Article number: e11836, Published: 20 JUL 2017 Matéria (Rio de Janeiro) v.22 n.2 2017 Matéria (Rio de Janeiro. Online) instacron:RLAM |
| ISSN: | 1517-7076 |
| Popis: | Seeking the reutilization of waste from agriculture and urban sources, studies have presented an option in the inclusion of such waste into new low-cost materials that are environmentally viable. One possibility is the reutilization of sugarcane bagasse ashes (SBA), the final waste in the productive process of the Brazilian alcohol sector. In addition to the behavior of materials with the use of SBA as additions in cement-based materials under normal environmental conditions, the study of the behavior of these materials when exposed to harsh environments is required. Thus, this project evaluated the properties, the compression strength and the bulk density of cement composites with partial replacement of cement by SBA without prior treatment. Also, it analyzed the weight loss and compressive strength of the composites subjected to environments with the presence of chloride ions. A factorial design was adopted to verify the influence of the addition of SBA (5wt%, 10wt% and 15wt%) and water/cement ratio (0.45 and 0.55) in the studied properties. The interaction between the factors was significant. The values obtained from the compressive strength of the manufactured composites showed that it is possible to replace up to 15wt% of cement for in natura SBA. After a chemical attack with an acid solution of HCl 30%, it could be observed that all materials had a lower compressive strength, which can be explained by the high weight loss suffered by all composites. Based on the results of compressive resistance, density and weight loss after the attack, it was observed that the mechanical behavior of the composites in relation to the referential conditions were similar. This study showed that it is feasible, in accordance to the studied properties, to use these composites in promoting the partial replacement of cement by this type of waste and its reutilization. |
| Databáze: | OpenAIRE |
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