Study on development of ultra high-strength cast-in-place concrete

The purpose of this study is to develop economical and high-quality ultra high-strength concrete and to improve the workability of this concrete. Consequently, admixture of four types - silica fume, alum-type mineral, fly ash and micropowder blast furnace slag - were used. In part I, the effects of factors - dosage rate of admixture, type of cement, type of aggregate, water-to-(cement + condensed admixture) ratio and dosage rate of high-range water-reducing admixture - on mechanical properties, deformation and dry shrinkage of ultra high-strength concrete are discussed and data concerning mix proportion design were determined. In part II, the effects of the order of adding the concrete's constituent materials during mixing and the time at which the high-range water-reducing admixture and mineral admixtures were added on the flowability and the segregation of the component materials of the fresh concrete were evaluated. The paper also proposes a practical mixing method for ultra high-strength concrete.

• Authors:
  • Kakizaki, M
  • Okamoto, K
  • Edahiro, H
• Publication Date: 1991-6

Language

• English

Media Info

• Pagination: 47p
• Serial:
  • Issue Number: 87

Subject/Index Terms

• TRT Terms: Additives; Concrete; High strength; Minerals; Mix design; Modulus of deformation; Properties of materials
• ATRI Terms: Admixture; Concrete; High strength; Material properties; Mineral; Mix design; Modulus
• Subject Areas: Materials;

Filing Info

• Accession Number: 01406075
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Aug 23 2012 11:19PM