Lignin-based admixtures : a scientometric analysis and qualitative discussion applied to cement-based composites.
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2023
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The development of lignin-based admixtures (LBAs) for cement-based composites is
an alternative to valorizing residual lignins generated in biorefineries and pulp and paper mills.
Consequently, LBAs have become an emerging research domain in the past decade. This study
examined the bibliographic data on LBAs through a scientometric analysis and in-depth qualitative
discussion. For this purpose, 161 articles were selected for the scientometric approach. After analyzing
the articles’ abstracts, 37 papers on developing new LBAs were selected and critically reviewed.
Significant publication sources, frequent keywords, influential scholars, and contributing countries
in LBAs research were identified during the science mapping. The LBAs developed so far were
classified as plasticizers, superplasticizers, set retarders, grinding aids, and air-entraining admixtures.
The qualitative discussion revealed that most studies have focused on developing LBAs using Kraft
lignins from pulp and paper mills. Thus, residual lignins from biorefineries need more attention
since their valorization is a relevant strategy for emerging economies with high biomass availability.
Most studies focused on production processes, chemical characterizations, and primary fresh-state
analyses of LBA-containing cement-based composites. However, to better assess the feasibility of
using different LBAs and encompass the multidisciplinarity of this subject, it is mandatory that future
studies also evaluate hardened-sate properties. This holistic review offers a helpful reference point to
early-stage researchers, industry professionals, and funding authorities on the research progress in
LBAs. It also contributes to understanding the role of lignin in sustainable construction.
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Lignin-based admixtures, Lignin valorization, Cement-based composites, Sustainable development, Scientometric analysis
Citação
CARVALHO, V. R. et al. Lignin-based admixtures: a scientometric analysis and qualitative discussion applied to cement-based composites. Polymers, v. 15, n. 5, artigo 1254, mar. 2023. Disponível em: <https://www.mdpi.com/2073-4360/15/5/1254>. Acesso em: 15 mar. 2023.