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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: New Developments in Superplasticizers for Lightweight Concrete
Author(s): M. Berra, G. Ferrara, G. Mantegazza, and A. Sereni
Publication: Special Publication
Appears on pages(s): 557-582
Keywords: adsorption; air-entraining agents; blast furnace slag; compressive strength; flexural strength; fly ash; lightweight concretes; lightweight aggregate concretes; mortars (material); permeability; water; plasticizers; silica fume; strength; workability; Ma
Abstract:Structural lightweight concrete is becoming more and more important in building practice as such material can provide mechanical and durability performances like normal weight concrete with higher strength-density ratio. A special superplasticizing admixture able to improve the lightweight concrete workability at very low water-cement ratio, avoiding the segregation problems, has been developed. The considerable advantages of this admixture, in comparison with traditional superplasticizers (ASTM C 494, Type F), are emphasized with workability and mechanical tests on standard mortars made with artificial lightweight fines obtained from sintered fly ash particles or natural sand, two types of cement (blast furnace cement or a mix of portland cement and fly ash), and different silica fume percentages. Water permeability and vacuum water absorption tests on lightweight mortars have also been performed. Finally, the properties of total lightweight concretes made incorporating the new admixture, blast-furnace cement in varying amounts, and silica fume and sintered fly ash lightweight aggregates have been evaluated.
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