Improving the reactivity of a former ground sugarcane bagasse ash produced by autogenous combustion through employment of two different additional grinding procedures
| Autor: | J.C.B. Moraes, Amanda Pereira Vieira, Jordi Payá, Guilherme Chagas Cordeiro, Jorge Luís Akasaki |
|---|---|
| Přispěvatelé: | Instituto Tecnológico de Aeronáutica (ITA), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Universidade Estadual Paulista (Unesp), Universidade Federal do Rio de Janeiro (UFRJ), Universitat Politècnica de València |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Compressive strength test Calcium hydroxide Materials science 11.- Conseguir que las ciudades y los asentamientos humanos sean inclusivos seguros resilientes y sostenibles Building and Construction Calcium hydroxide/pozzolan paste Portland cement/pozzolan paste law.invention Portland cement chemistry.chemical_compound Compressive strength chemistry law Particle-size distribution Pozzolan characterization General Materials Science Particle size Composite material Microstructural study Bagasse Curing (chemistry) Civil and Structural Engineering |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| DOI: | 10.1016/j.conbuildmat.2020.121471 |
| Popis: | [EN] Studies on reactivity of sugarcane bagasse ash (SCBA), obtained by an autogenous combustion process, with low loss on ignition and three different particle sizes were carried out (SCBA-1, SCBA-2 and SCBA-3). The ashes were characterized by their particle size distribution, chemical composition, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and field emission scanning electron microscopy (FESEM). The ash with lowest particle size was SCBA-3, followed by SCBA-2, which both were finer than SCBA-1. Calcium hydroxide/SCBA blends were assessed by means of loss of electrical conductivity (Lc), TGA and FESEM. Portland cement/SCBA pastes were analyzed through isothermal calorimetry, TGA, FESEM and compressive strength. Results showed that SCBA with lowest particle size (SCBA-3) presented highest reactivity, which resulted in statically significant better compressive strength than that of control paste (with only Portland cement) after 28 days of curing. The improvement on compressive strength by employing SCBA-3 respect to control and SCBA-1 were 17.9 and 14.1%, respectively, after 180 days of curing. This study was financed in part by the Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ). |
| Databáze: | OpenAIRE |
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