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Polymer Physics and Superplasticizers
SP-262: Ninth ACI International Conference on Superplasticizers and Other Chemical Admixtures, 2009This paper describes how the increased performance of polycarboxylate superplasticizers is generally explained by the steric hindrance they are intended to develop between cement particles. In fact, direct evidence of this is relatively scarce. The only direct measurements to date have been made by atomic force microscopy on model surfaces of magnesium
Robert J. Flatt +4 more
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Superplasticized Microcement Grouts
SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete, 1997This paper examines the rheological and mechanical behavior of superplasticized microcement grouts to be used for the consolidation of porous systems (e.g. sand deposits, masonry walls of historical buildings). Five micro cements were used: they differed in chemical composition of the clinker, type of mineral addition (natural pozzolan or silica fume),
M. Collepardi +2 more
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2002
Publisher Summary This chapter explores the advantages derived from the use of superplasticizing admixtures, including production of concrete having high workability, and production of high-strength concrete having normal workability and lower water content.
V.S. Ramachandran +3 more
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Publisher Summary This chapter explores the advantages derived from the use of superplasticizing admixtures, including production of concrete having high workability, and production of high-strength concrete having normal workability and lower water content.
V.S. Ramachandran +3 more
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Performance of concretes produced with superplasticizer
Journal of Applied Polymer Science, 2006AbstractNowadays, additive chemical substances are used in the production of high‐performance concrete composites. These additives increase the fresh workability of concrete by decreasing the water/cement (W/C) ratio. The aim of this study was to examine the effects of water‐soluble polymers on concrete performance.
Fahriye Kilinckale, G. G. Doǧan
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Superplasticizer Adsorption on Synthetic Ettringite
SP-217: Seventh CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete, 2003Superplasticizers typically work within the first 2 hours of cement hydration. Therefore, early hydration products have to be studied to investigate their mode of action. The experiments in this paper demonstrate that ettringite is a preferred phase for the adsorption of polycondensate or polycarboxylate based superplasticizers, whereas polycondensate ...
Johann Plank, Christian Hirsch
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Application of Polycarboxylate Superplasticizer in the Concrete
Materials Science Forum, 2017Compared with the traditional water reducer, polycarboxylicwater-reducing agent exhibits the advantages of high water-reducing rate, cement paste fluidity and low slump loss, etc. The structure of polycarboxylates water reducing agent molecular is comb type.
Xiao Rong Li +4 more
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Superplasticizer for High Strength Concrete
MRS Proceedings, 2015ABSTRACTIn the early 1970s, experts predicted that the practical limit of ready-mixed concrete would be unlikely to exceed a compressive strength greater than 90 MPa [1]. Over the past two decades, the development of high-strength concrete has enabled builders to easily meet and surpass this estimate.
Maria Eugenia Lara Magaña +1 more
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Journal of Dispersion Science and Technology, 2020
Multi-armed polycarboxylate superplasticizers (SPCEs) were prepared via esterification-copolymerization in aqueous media from various polyols (including glycerol, xylitol and mannitol), acrylic acid (AA) and isopentenyl oxy polyethylene glycol ether ...
Kun Wang +5 more
semanticscholar +1 more source
Multi-armed polycarboxylate superplasticizers (SPCEs) were prepared via esterification-copolymerization in aqueous media from various polyols (including glycerol, xylitol and mannitol), acrylic acid (AA) and isopentenyl oxy polyethylene glycol ether ...
Kun Wang +5 more
semanticscholar +1 more source
Influence of Superplasticizers on Workability of Concrete
Journal of Materials in Civil Engineering, 1999This paper outlines the theoretical foundations governing the rheological properties of concrete. The rheological equation for fresh concrete is given as a modification of Bingham's equation. The shear resistance of the concrete mix is explained in terms of two constants—yield value and plastic viscosity.
Fouad Faroug +2 more
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Use of Superplasticizers as Water Reducers
Cement, Concrete, and Aggregates, 1979Abstract This report describes the performance of superplasticizers used as water-reducing admixtures in concrete. Various dosages of three commercially available superplasticizers were added to air-entrained reference concretes containing ASTM Type I, Type II, and Type V cements (ASTM Standard Specification for Portland Cement [C 150 ...
RS Ghosh, VM Malhotra
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