Bio-Based Superplasticizers for Cement-Based Materials

Partschefeld, Stephan; Osburg, Andrea

doi:10.1007/978-3-319-78175-4_7

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…There has recently been growing interest in the development of chemically modified polysaccharides as high‐range water reducing admixtures 110 . Numerous investigations have been reported to modify polysaccharides such as starch and pure cellulose for concrete water reducers 6,36,39,57,117–121 .…”

Section: Bio‐based Concrete Water Reducersmentioning

confidence: 99%

“…Carbohydrates such as glucose, sucrose, corn syrup and their polymers such starch, dextrin, chitosan and cellulose, have been used in concrete production for decades. 110 Their polymers structures usually comprise low to high molecular weight complexes with repeating units of glucose. 111 The types and performances of various types of carbohydratebased concrete water reducers are summarized in Table 3.…”

Section: Carbohydrate-based Concrete Water Reducersmentioning

confidence: 99%

“…There has recently been growing interest in the development of chemically modified polysaccharides as high-range water reducing admixtures. 110 Numerous investigations have been reported to modify polysaccharides such as starch and pure cellulose for concrete water reducers. 6,36,39,57,[117][118][119][120][121] Tegiacchi and Casu 117 found that superplasticizers with superior properties could be produced by sulfonating polysaccharides with suitable sulfonating agents.…”

Section: Carbohydrate-based Concrete Water Reducersmentioning

confidence: 99%

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Production of bio‐based concrete water reducers from renewable resources: a review

Johnson

Sosa

Arredondo

et al. 2023

Biofuels Bioprod Bioref

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Concrete is a valuable construction material with high mechanical strength and durability, used extensively in the construction industry. It is produced by mixing sand, stones, cement, and water in different proportions depending on the desired quality of the final product. Water reducers are additional chemical ingredients used in concrete to reduce the quantity of water required in the concrete mixture. When added to concrete, water reducers increase the workability and flowability of concrete in the freshly mixed state and improve the mechanical strength and durability of the final hardened product. This review paper describes the different types and applications of concrete water reducers used in the construction industry including their working mechanisms and fluidity effects on concrete properties. It discusses the production of synthetic and bio‐based concrete water reducers and reviews the present challenges involved in the preparation of bio‐based concrete water reducers from renewable resources. © 2023 Society of Industrial Chemistry and John Wiley & Sons Ltd.

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Section: Bio‐based Concrete Water Reducersmentioning

confidence: 99%

Section: Carbohydrate-based Concrete Water Reducersmentioning

confidence: 99%

Section: Carbohydrate-based Concrete Water Reducersmentioning

confidence: 99%

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Production of bio‐based concrete water reducers from renewable resources: a review

Johnson

Sosa

Arredondo

et al. 2023

Biofuels Bioprod Bioref

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Nachhaltiger Betonbau

Haist¹,

Bergmeister²,

Fouad³

et al. 2023

2023 Bauphysik Kalender

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Effects of Bio-Based Plasticizers, Made From Starch, on the Properties of Fresh and Hardened Metakaolin-Geopolymer Mortar: Basic Investigations

Tutal

Partschefeld

Schneider

et al. 2020

Clays and clay miner.

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Conventional superplasticizers based on polycarboxylate ether (PCE) show an intolerance to clay minerals due to intercalation of their polyethylene glycol (PEG) side chains into the interlayers of the clay mineral. An intolerance to very basic media is also known. This makes PCE an unsuitable choice as a superplasticizer for geopolymers. Bio-based superplasticizers derived from starch showed comparable effects to PCE in a cementitious system. The aim of the present study was to determine if starch superplasticizers (SSPs) could be a suitable additive for geopolymers by carrying out basic investigations with respect to slump, hardening, compressive and flexural strength, shrinkage, and porosity. Four SSPs were synthesized, differing in charge polarity and specific charge density. Two conventional PCE superplasticizers, differing in terms of molecular structure, were also included in this study. The results revealed that SSPs improved the slump of a metakaolin-based geopolymer (MK-geopolymer) mortar while the PCE investigated showed no improvement. The impact of superplasticizers on early hardening (up to 72 h) was negligible. Less linear shrinkage over the course of 56 days was seen for all samples in comparison with the reference. Compressive strengths of SSP specimens tested after 7 and 28 days of curing were comparable to the reference, while PCE led to a decline. The SSPs had a small impact on porosity with a shift to the formation of more gel pores while PCE caused an increase in porosity. Throughout this research, SSPs were identified as promising superplasticizers for MK-geopolymer mortar and concrete.

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Bio-Based Superplasticizers for Cement-Based Materials

Cited by 4 publications

References 4 publications

Production of bio‐based concrete water reducers from renewable resources: a review

Production of bio‐based concrete water reducers from renewable resources: a review

Nachhaltiger Betonbau

Effects of Bio-Based Plasticizers, Made From Starch, on the Properties of Fresh and Hardened Metakaolin-Geopolymer Mortar: Basic Investigations

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