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

Paiva, Rayane de Lima Moura; Caldas, Lucas Rosse; Martins, Adriana Paiva de Souza; Filho, Romildo Dias Tolêdo

doi:10.1016/j.conbuildmat.2021.125971

Cited by 12 publications

(13 citation statements)

References 53 publications

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“…The influence on the bio-concretes carbon footprint of the transport distances variation of bamboo waste is presented in Figure 3. Efficient transport plays an important role in GHG emissions and depending on the location that the material, byproduct, or waste is located it can considerably increase the final emissions [21,30], which is also observed in this study when comparing, for example, the extremes, RJ and AC, with a difference of 129.9 kgCO2-eq/m³.…”

Section: Transport Distances Sensitivity Analysis For Bamboo Wastesupporting

confidence: 71%

“…Another alternative for the partial replacement of cement is the use of earth, which has environmental, economic, and technological benefits, such as: wide availability favouring the reduction of the cost of transport and its emissions; low energy demand, since the earth requires little (or no) processing and; non-toxicity [19,20,21]. However, the effect of earth addition in bio-concretes is innovative and requires further studies.…”

Section: Introductionmentioning

confidence: 99%

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Potential of Earth-Based Bamboo Bio-Concrete in the Search for Circular and Net-Zero Carbon Solutions to Construction Industry

Araujo

Silva

Sá

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In order to limit climate change by achieving goals of cutting emissions down to net-zero by 2050, stronger efforts are needed to reduce the whole life cycle emissions of buildings. Integrating residual bio-based and earth-based solutions to concrete seems to stand out in the sector since these solutions have the potential of lowering materials embodied emissions, and enhancing building thermal performance. However, it is still unclear how environmentally beneficial bio-based and earth-based materials are and how they behave mechanically when they are both integrated into concrete. In order to know their potential applications in the sector, this study aims to evaluate and compare the mechanical performance and environmental profile of Earth-based Bamboo Bio-Concretes (EBBCs) with different earth fractions as partial replacements of the cementitious matrix, by evaluating its Greenhouse Gas (GHG) emissions. For that, it was considered the use of only bio-based aggregates (bamboo waste) instead of mineral ones at a fixed volume fraction of 45%. The methodology involved the: processing and characterization of earth and bamboo; EBBCs dosage study and mechanical testing; consideration of fixed proportions of binders of 30:30:40 (cement: metakaolin: fly ash) which were replaced gradually by earth in the volume fractions of 10%, 15%, and 20%. The Life Cycle Assessment (LCA) was used for accounting GHG emissions. LCA scope was from cradle-to-gate considering biogenic carbon methodology and avoided impacts of incinerating bamboo waste. A sensitive analysis was performed to evaluate the impact of transport distances variation of bamboo waste. Mechanical results point to an increase in EBBCs compressive strength with the increase of earth content until 15% of cementitious matrix replacement. LCA results showed negative embodied GHG emissions in all mixtures with an average of -115,7 kgCO2-eq/m3 mainly due to the high biomass content in mixtures. The increase of earth content from 0% to 20% in the mixtures reduced emissions by 59,7 kgCO2-eq/m3 since the binder’s content was reduced. With that, EBBC seems to be a promising innovative material to help achieve net-zero carbon emission targets and a circular pathway in the building and construction sectors.

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Section: Transport Distances Sensitivity Analysis For Bamboo Wastesupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Potential of Earth-Based Bamboo Bio-Concrete in the Search for Circular and Net-Zero Carbon Solutions to Construction Industry

Araujo

Silva

Sá

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…No intuito de avaliar a representatividade de cada insumo e de cada categoria de impacto, conforme já explicado, os dados foram normalizados. Analisando os resultados notou-se que ao contrário do que se esperava com base na revisão da literatura (7,10,11,12,13,14,15,16,17) , a categoria de Aquecimento Global não foi a mais representativa. Ressalta-se que o conjunto de normalização da CML baseline é do ano de 2000, por isso, é preciso considerar que em anos diferentes as emissões podem ser consideravelmente divergentes em virtude das atividades humanas e densidade demográfica do ano tomado como referência.…”

Section: Resultsunclassified

Avaliação Da Contribuição Dos Insumos No Impacto Ambiental Da Argamassa De Revestimento

SILVA,

MACENO,

COSTA

2023

Simpósio Brasileiro De Tecnologia Das Argamassas

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Objetivando analisar o perfil ambiental de uma argamassa dosada em obra tradicional, bem como a contribuição de seus insumos em seu impacto total, empregou-se a metodologia da avaliação do ciclo de vida assistida por software. Os resultados denotaram que os aglomerantes imprimem maior impacto, corroborando com a literatura, bem como indicaram a expressividade do impacto de cada insumo, em separado, quando extrapolado para o cenário da produção anual de argamassas.

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“…Furthermore, the energy consumption for the preparation of earth-based materials is approximately 1% of that needed to produce traditional building materials [8,9]. The earth mortar preparation is also less energy-intensive than traditional cement-lime mortars [10].…”

Section: Introductionmentioning

confidence: 99%

Can TEMPO-Oxidized Cellulose Nanofibers Be Used as Additives in Bio-Based Building Materials? A Preliminary Study on Earth Plasters

et al. 2022

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Interest towards cellulose nanofibers obtained from virgin and waste sources has seen a significant growth, mainly thanks to the increasing sensitivity towards the concept of circular economy and the high levels of paper recycling achieved in recent years. Inspired by the guidelines of the green building industry, this study proposes the production and characterization of TEMPO-oxidized and homogenized cellulose nanofibers (TOHO CNF) from different sources and their use as additives for earth plasters on two different raw earth samples, characterized by geotechnical laboratory tests and mineralogical analysis: a high-plasticity clay (T2) and a medium-compressibility silt (ABS). Original sources, including those derived from waste (recycled cardboard and paper mill sludge), were characterized by determining chemical content (cellulose versus ashes and lignin) and fiber morphology. TOHO CNF derived from the different sources were compared in terms of nanofibers medium diameter, crystallinity degree, thermal decomposition and oxidation degree, that is the content of carboxylic groups per gram of sample. Then, a preliminary analysis of the influence of CNF on earth plasters is examined. Adhesion and capillary absorption tests highlighted the effect of such nanofibers on blends in function of two factors, namely the cellulose original source and the oxidation degree of the fibers. In particular, for both earth samples, T2 and ABS, a significant increase in adhesion strength was observed in the presence of some TOHO CNF additives. As far as capillary sorption tests, while an undesired increase in water adsorption was detected for T2 compared to the control, in the case of ABS, a significant reduction in water content was measured by adding TOHO CNF derived from recycled sources. These results pave the way for further in-depth investigation on the role of TOHO CNF as additives for earth plasters.

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

Cited by 12 publications

References 53 publications

Potential of Earth-Based Bamboo Bio-Concrete in the Search for Circular and Net-Zero Carbon Solutions to Construction Industry

Potential of Earth-Based Bamboo Bio-Concrete in the Search for Circular and Net-Zero Carbon Solutions to Construction Industry

Avaliação Da Contribuição Dos Insumos No Impacto Ambiental Da Argamassa De Revestimento

Can TEMPO-Oxidized Cellulose Nanofibers Be Used as Additives in Bio-Based Building Materials? A Preliminary Study on Earth Plasters

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