Sugar‐cane bagasse ash (SCBA): studies on its properties for reusing in concrete production

Abstract

Sugar cane bagasse is an industrial waste which is used worldwide as fuel in the same sugarcane industry. The combustion yields ashes containing high amounts of unburned matter, silicon and aluminium oxides as main components. These sugar-cane bagasse ashes (SCBA) have been chemically, physically and mineralogically characterized, in order to evaluate the possibility of their use as a cement-replacing material in the concrete industry. Determination of parameters such as carbon content (by thermal analysis methods), presence of crystalline material (by X-ray diffractometry), granulometric distribution (by laser diffraction in water suspensions), morphology of particles (by scanning electron microscopy) and reactivity towards lime (pozzolanic activity by thermogravimetric monitoring in lime/SCBA and cement/SCBA pastes) have been carried out.

Study of the binary system fly ash/sugarcane bagasse ash (FA/SCBA) in SiO2/K2O alkali-activated binders

“…The crystalline compounds present in FA were mainly quartz (SiO 2 , PDF card# 331161) and mullite (3Al 2 O 3 .2SiO 2 , PDF card# 150776), whereas for SCBA there were mainly quartz and calcite (CaCO 3 , PDF card# 050586). The particle size distribution and derivative granulometric curves of FA and SCBA are shown in Figure 1 Figure 2b) had an irregular shape, but some particles showed a specific shape (prismatic, see Figure 2a) [32]. Fly ash (Figure 2c and Figure 2d) presented as spherical particles, although some irregular particles were produced during the milling process.…”

Assessment of sugar cane straw ash (SCSA) as pozzolanic material in blended Portland cement: Microstructural characterization of pastes and mechanical strength of mortars

“…A considerable LOI value (15.5%) was obtained, which was attributed to the presence of organic matter and/or carbon of unburned sugar cane straw. Thus, thermogravimetric analysis and differential thermal analysis of SCSA showed that the main mass loss was produced in the 250-625ºC range, which are the typical volatilization/oxidation temperatures of organic matter and carbon [43]. A small mass loss above 650ºC (0.34%) was observed, indicating that the presence of calcium carbonate was very low.…”

Caracterização de cinza do bagaço de cana-de-açúcar para emprego como pozolana em materiais cimentícios

“…12 Os resultados obtidos nas duas metodologias de avaliação adotadas, baseadas em ensaios de resistência à compressão de argamassas e químicos, confirmam o potencial da cinza do bagaço para emprego como pozolana. Este comportamento está de acordo com pesquisas desenvolvidas com cinzas do bagaço produzidas sem controle das condições de queima [21][22][23] e com queima controlada em laboratório. 4,19 …”