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Polycarboxylate superplasticizers (PCEs) are comb-shaped polymers with an anionic backbone and several nonionic pendant chains, which typically are comprised of polyethylene glycols. In this study, the synthesis of a new type of superplasticizer is presented, which does not exhibit the typical comb-shaped form of PCEs but is built up from a linear polyetheramine and a hyperbranched polyglycerol scaffold, which was carboxymethylated in the periphery. 1H/13C NMR and FT-IR spectroscopy and size exclusion chromatography were employed for the characterization of the polymers. Furthermore, their dispersing performance and “slump retention” capability were investigated in cement pastes. Adsorption and zeta potential measurements as well as heat flow calorimetry were conducted to gain more insight into the interaction of the polymers with cement. It was found that such non-comb-shaped polymers are highly effective cement dispersants. Moreover, the hyperbranched superplasticizers exhibited high robustness toward alkali sulfates and maintained the fluidity much longer, compared to a conventional comb-shaped PCE.

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Introduction Historical Outline The Construction Industry Size of the Industry Building Materials Chemicals Used in Construction Major Building Materials Concrete Grouts and Mortars Wall Plasters Plasterboards Paints and Coatings Oil and Gas Well Construction Biopolymers Used in Construction Lignosulfonates Biopolymers from Soil Hydrocarbon‐based Biopolymers Protein‐based Biopolymers Starch and Cellulose Derivatives Seed Gums Exudate Gums and Root Resins Microbial Biopolymers Chitosan Biodegradable Polymers Biopolymers with Potential for Future Use Tannins Collagen and Gelatin Alginates and Carrageenan Pectin Tamarind and Cassia Gum Arabic, Gum Karaya and Gum Tragacanth Dextran and Pullulan Outlook and Perspectives

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