In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
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.
ACI World Headquarters
38800 Country Club Dr.
Farmington Hills, MI
ACI Middle East Regional Office
Second Floor, Office # 02.01/07
The Offices 02 Building, One Central
Dubai World Trade Center Complex
Phone: +971.4.516.3208 & 3209
Feedback via Email
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: Mixture Properties of Self-Compacting, High-Performance Concrete
Author(s): Naoki Nagamoto and Kazumasa Ozawa
Publication: Special Publication
Appears on pages(s): 623-636
Keywords: box form test; funnel speed; quantity of coarse aggregate; Self-compacting
concrete; self-compactability; slump flow; coarse aggregates; deformation; slump tests; superplasticizers; tests
Abstract:The self-compacting concrete, which was developed in 1988 in Japan, can be filled in a formwork without using any vibrators. It is an effective means of ensuring consistent quality in concrete structures, as the human factor in consolidation can be eliminated. This type of concrete has markedly increased deformability without segregation; high deformability is achieved mainly through the use of superplasticizers, while segregation resistance is achieved mainly through viscosity of the mortar or paste components of the concrete. The focus of this study is on experimental assessment of the effects of each component of concrete mixture in self-compacting concrete on the fresh state. The main findings are as follows: (1) There are certain combinations of slump flow and funnel speed that gave optimum self-compactability, with self-compactability falling off as one moves away from these combinations. This agrees with the results of the previous studies. (2) Increasin g the coarse aggregate content above the range G/Glim = 0.50 results in loss of compaction. The decrease in compaction is in a non-linear relationship with the increase in coarse aggregate, showing a rapid falling-off in self-compactability over G/Glim = 0.50. (3) If the quantity of coarse aggregate is varied while the quantity of fine aggregate remains fixed, no clear change can be seen in the water-powder volume ratio required to achieve self-compacting concrete, but the quantity of super-plasticizer required increases.
Click here to become an online Journal subscriber
Please enter this 5 digit unlock code on the web page.