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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Novel Polymer Blends as Concrete Superplasticizers
Author(s): X. Zhang, M. Page, Y. Denomme, and C. Jolicoeur
Publication: Special Publication
Appears on pages(s): 217-240
Keywords: admixtures; cement; concrete; mortar; paste; polyacrylate; polynaphthalene sulfonate; slump retention; superplasticizer
Abstract:Component blending is a common practice in concrete chemical admixtures, for example, in water-reducing admixtures comprising lignosulfonate salts and other synthetic or naturally-occurring chemicals. Recent developments in polymer chemistry have generated a variety of new superplasticizers, mostly polyacrylate esters (PAE), which exhibit properties remarkably different from those of conventional superplasticizers such as PNS, or PMS. In principle, it would be appealing to combine the latter with PAE polymers in order to take advantage of their complementary features; unfortunately these polymer families are generally found to be mutually incompatible in cementitious systems. New polymer blends (PNS-X43) comprising an optimized conventional superplasticizer and new polycarboxylate co-polymers have now been developed that improves the slump retention of PNS at low W/C, typically, 0.35-0.40. The results obtained with this blend in various pastes, mortars and concrete are compared to those achieved with a PAE superplasticizer representative of the most effective product currently available.
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