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

Moraes, J.C.B.; Akasaki, Jorge Luís; Melges, José Luiz Pinheiro; Monzó, J.; Borrachero, M.V.; Soriano, Lourdes; Payá, J.; Tashima, Mauro M.

doi:10.1016/j.conbuildmat.2015.07.108

Cited by 92 publications

(46 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Table 3 summarizes the mass losses assessed by TGA studies on pastes after 3 and 7 days of curing at 65°C; the DTG curves are shown in Figure 4. Mass loss between 100-200°C is related to the dehydration of alkali-activated products [37]. First, it was noted that S2-50/50 presented the lowest mass loss for both curing ages; this behavior agrees with the differences found in compressive strength development.…”

Section: Results For Section 1: Determination Of the Optimum Sio 2 /Ksupporting

confidence: 67%

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

Castaldelli

Moraes

Akasaki

et al. 2016

Fuel

Self Cite

View full text Add to dashboard Cite

Due environmental problems related to Portland cement consumption, many studies have been performed to diminish its use. One solution is the development of alkali-activated binders, which can decrease CO 2 emissions and energy consumption by 70% when compared to Portland cement production. In addition, an alkali-activated binder presents mechanical properties similar to Portland cement mixtures, which turns into an interesting material in civil construction. Aluminosilicate-based materials are important raw materials to produce the alkali-activated binders. Therefore, two residues are presented as an aluminosilicate source in this study: fly ash (FA) and sugarcane bagasse ash (SCBA). Both residues were obtained from a combustion process to generate energy, the former from coal and the latter from the bagasse of the sugarcane industry. In addition, the alkaline activating solution is an important factor to achieve improved mechanical properties. In this context, this study investigated the influence of four different SiO 2 /K 2 O molar ratios (0, 0.36, 0.75 and 1.22) in the activating solution with a constant water content, and three FA/SCBA binder proportions (75/25, 50/50 and 25/75). Microstructural characterization was carried out by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, mercury intrusion porosimetry, pH and electrical conductivity measurements to study the evolution of the reaction process. The compressive strength of mortars was assessed in order to determine the optimum SiO 2 /K 2 O molar ratio and FA/SCBA ratio. The tests showed that a SiO 2 /K 2 O molar ratio of 0.75 and FA/SCBA proportion of 75/25 provided the best mechanical properties.

show abstract

Section: Results For Section 1: Determination Of the Optimum Sio 2 /Ksupporting

confidence: 67%

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

Castaldelli

Moraes

Akasaki

et al. 2016

Fuel

Self Cite

View full text Add to dashboard Cite

show abstract

“…These minor changes can be related to changes in water bonds of the C-S-H gels during the curing time. In previous studies 30 , more important changes in the mass loss related to 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 15 formed hydrates at 20ºC were observed after the calcium hydroxide was completely combined, differently to that found at 40ºC. Comparison of results from different techniques.…”

Section: Resultsmentioning

confidence: 87%

Pozzolanic Reactivity Studies on a Biomass-Derived Waste from Sugar Cane Production: Sugar Cane Straw Ash (SCSA)

Moraes

Melges

Akasaki

et al. 2016

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

American Chemical SocietyMoraes, J.; Melges, JLP.; Akasaki, JL.; Tashima, MM.; Soriano Martinez, L.; Monzó Balbuena, JM.; Borrachero Rosado, MV.... (2016). Pozzolanic reactivity studies on a miomass-derived waste from sugar cane production: sugar cane straw ash (SCSA) Just Accepted "Just Accepted" manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides "Just Accepted" as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. "Just Accepted" manuscripts appear in full in PDF format accompanied by an HTML abstract. "Just Accepted" manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). "Just Accepted" is an optional service offered to authors. Therefore, the "Just Accepted" Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the "Just Accepted" Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these "Just Accepted" manuscripts. 1Pozzolanic reactivity studies on a biomass-derived waste from sugar cane production: sugar cane straw ash (SCSA) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 ABSTRACTBiomass has gained in importance as an energy source in recent years. One of the crops that presents interesting opportunities with regard to biomass is sugar cane. In Brazil, sugar cane production is increasing for alcohol and sugar manufacture. Some by-products, such as sugar cane straw, also are obtained during harvesting. Due the calorific value of the sugar cane straw, its use as biomass is increasing. After the straw is burned to produce energy, an ash is obtained: sugar cane straw ash (SCSA). This waste needs an appropriate destination and, since the recent publication of successful studies using biomass derived-ashes as pozzolanic material, the present study aimed to assess the pozzolanic reactivity of sugar cane straw ash. The pozzolanic activity was assessed using a new and simple recently proposed method: evaluation of the electrical conductivity of calcium hydroxide (CH) and pozzolan suspensions, in which solid CH is initially present. These results were compared to those of two other well-established techniques: Fourier transformed infrared spectroscopy and thermogravimet...

show abstract

“…Sua produção representa cerca de 5 a 8% das emissões de no mundo, e para produzir uma tonelada de cimento Portland são necessárias 2,8 toneladas de matérias-primas. (MORAES et al, 2015) Com o intuito de reduzir essas emissões algumas alternativas estão sendo utilizadas. Uma alternativa é a substituição do clínquer do cimento Portland, por adições de materiais residuais, estes também podem atuar como materiais cimentícios, por exemplo, escórias de alto forno e pozolanas.…”

Section: Metodologia Exploratória 21 Cimento Portlandunclassified

Sílica ativa e cinza do bagaço de cana-de-açúcar: Resíduos que podem suplementar ou substituir o cimento Portland

Silva¹,

Bortoletto

Almeida³

2017

View full text Add to dashboard Cite

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

Cited by 92 publications

References 32 publications

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

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

Pozzolanic Reactivity Studies on a Biomass-Derived Waste from Sugar Cane Production: Sugar Cane Straw Ash (SCSA)

Sílica ativa e cinza do bagaço de cana-de-açúcar: Resíduos que podem suplementar ou substituir o cimento Portland

Contact Info

Product

Resources

About