Avaliação de estratégias para a mitigação dos impactos ambientais de revestimentos argamassados no Brasil

Caldas, Lucas Rosse; Carvalho, Michele Tereza Marques; Filho, Romildo Dias Toledo

doi:10.1590/s1678-86212020000300433

Cited by 7 publications

(7 citation statements)

References 25 publications

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“…When the embodied carbon of mortar components was evaluated, it was perceived that the binders, principally hydrated lime and Portland cement, were the most GHG emission-intensive materials, which agrees with the literature related to mortars evaluation [13,42,53]. Calcium carbonate (CaCO 3 ) calcination is one of the most impactful processes due to the high amount of CO 2 released.…”

Section: Embodied Ghg Emissionssupporting

confidence: 78%

“…The carbonation process, specifically in concrete structures, typically did not represent a significant contribution. Mortars that use lime in their formulation are especially important and should be measured in a life GHG emissions study, as already pointed out in other studies [53]. Additionally, it can be expected that since plasters were used in a minimal thickness, all the layers will be carbonated [53,68].…”

Section: Embodied Ghg Emissionsmentioning

confidence: 91%

“…The superplasticizer was used in small quantities and normally replaces a high number of cementitious materials (due to the water reduction in the mixture and the fewer cementitious materials required). In the case of mortars, the superplasticizer commonly replaces cement and hydrated lime, as literature shows [52,53], without compromising the rheology. The cementitious materials, and especially lime, are the most GHG emission-intensive mortars constituents.…”

Section: Methodsmentioning

confidence: 99%

“…Specifically for mortars used as plasters in buildings, it was considered that the carbonation occurs in the first year of the building usage stage since the plaster is a very thin layer [64,68]. For the quantification of this CO 2 , the equation presented by Caldas et al [53], which considered the content of CaO in hydrated lime (0.70) and cement (0.5) in the mortar mixtures according to manufacturers' data, was adopted. Finally, only some part of the available CaO was converted into CaCO 3 , and it was assumed that this value is 75%, according to Lagerblad [69].…”

Section: Carbonationmentioning

confidence: 99%

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Thermal-Energy Analysis and Life Cycle GHG Emissions Assessments of Innovative Earth-Based Bamboo Plastering Mortars

et al. 2021

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Biomaterials and raw earth have demonstrated a promising potential for improving various thermal properties of plastering mortars used in buildings. The objective of this research was the evaluation of the thermal-energy performances and life cycle greenhouse gas (GHG) emissions of different mixtures of engineered, bio-based earth mortars composed of bamboo particles, earth, and different cementitious materials. Four mixtures were assessed: mortars without bamboo particles (matrix), and mortars containing 3%, 6%, or 9% of bamboo particles by volume. The bulk density and thermal conductivity values obtained for the matrix and mortars with the highest percentage of bamboo particles (9%) were 1704.13 and 1471.80 kg/m3, and 0.62 and 0.43 W/M·K, respectively. Based on experimental results, thermal-energy simulations were carried out using a social housing project as a case study. The simulations evaluated different climate conditions and applied life cycle GHG emissions assessment methodology. Compared with typical cement and lime plastering mortars, the proposed bio-based earth mortars presented a superior thermal-energy performance and lower GHG emissions, particularly the 9% bamboo particles mixture. GHG emissions reached a maximum decrease of 28%. The main scientific contribution of this research is the presentation of an engineered, bio-based earth mortar that can be manufactured using local raw materials available in most developing countries with significant housing demands. The method used, based on experimental research, thermal-energy analysis, and life cycle GHG emissions, may be used for evaluating other innovative materials. It was verified that even with thin plastering in buildings, it is possible to achieve energy efficiency gains and to reduce GHG emissions.

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Section: Embodied Ghg Emissionssupporting

confidence: 78%

Section: Embodied Ghg Emissionsmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Carbonationmentioning

confidence: 99%

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Thermal-Energy Analysis and Life Cycle GHG Emissions Assessments of Innovative Earth-Based Bamboo Plastering Mortars

et al. 2021

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“…A ACV tem sido extensivamente aplicada para o estudo de diferentes materiais (SAADE et al, 2020), sendo os principais de interesse o concreto ( VAN DEN HEEDE;DE BELIE, 2012;CELIK et al, 2015;GÖSWEIN et al, 2018), o aço (XING, et al, 2008;PALACIOS-MUNOZ et al, 2019), a madeira (PAWELZIK et al, 2013;PEÑALOZA et al, 2016), argamassas (CALDAS et al, 2020a), elementos pré-fabricados (LUO;CHEN, 2020). Quando se trata de elementos construtivos os sistemas da envoltória e especialmente a fachada recebe uma grande atenção (CABEZA et al, 2014;ANAND;AMOR, 2017) pois está diretamente relacionada ao desempenho térmico e consumo de energia nas edificações.…”

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Avaliação ambiental do sistema construtivo de alvenaria de blocos de solo-cimento considerando diferentes especificações de projeto

Caldas¹,

Filho²

2021

GT Projetos

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Este trabalho teve o objetivo de avaliar os potenciais impactos ambientais no ciclo de vida de diferentes especificações de projeto do sistema de alvenaria estrutural de blocos de solo-cimento. As alternativas avaliadas foram comparadas com a alvenaria estrutural de blocos cerâmicos e de concreto. Foi utilizada a metodologia de Avaliação do Ciclo de Vida (ACV). Foram comparados diferentes tipos de processo de produção de blocos de solo-cimento, considerando um processo manual e outro mecanizado. Foram também comparados dois tipos de cimento, CP-II-E-40 e CP-V-ARI e diferentes tipos de revestimento utilizados em uma parede de blocos de solo-cimento. A alternativa de alvenaria com blocos de solo-cimento com processo manual e com cimento CP-II-E-40 foi a mais vantajosa. As alternativas de alvenaria de blocos de solo-cimento apresentaram menores impactos ambientais que a alvenaria estrutural de blocos cerâmicos e de concreto para a maioria dos casos avaliados principalmente quando o revestimento de resina acrílica é considerado, com diferenças de até 77% para a categoria de Potencial de Aquecimento Global. A pesquisa contribui por mostrar, de forma quantitativa, o desempenho ambiental de diferentes alternativas do sistema de alvenaria de blocos de solo-cimento, para o contexto brasileiro. Os resultados apresentados, especialmente as diretrizes ambientais de projeto, podem auxiliar projetistas e construtores desse sistema construtivo

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Potentiality of earth-based mortar containing bamboo particles for GHG emissions reduction

Paiva

Caldas

Martins

et al. 2022

Construction and Building Materials

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Avaliação de estratégias para a mitigação dos impactos ambientais de revestimentos argamassados no Brasil

Cited by 7 publications

References 25 publications

Thermal-Energy Analysis and Life Cycle GHG Emissions Assessments of Innovative Earth-Based Bamboo Plastering Mortars

Thermal-Energy Analysis and Life Cycle GHG Emissions Assessments of Innovative Earth-Based Bamboo Plastering Mortars

Avaliação ambiental do sistema construtivo de alvenaria de blocos de solo-cimento considerando diferentes especificações de projeto

Potentiality of earth-based mortar containing bamboo particles for GHG emissions reduction

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