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.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
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: Strength Development of Ternary Blended Cement with High-Calcium Fly Ash and Amorphous Silica
Author(s): S. Antiohos, D. Giakoumelos, and S. Tsimas
Publication: Special Publication
Appears on pages(s): 153-168
Keywords: amorphous; blended cement; high-calcium fly ash; silica; ternary blend
Abstract:The work presented herein is a laboratory study on the mechanical properties of ternary blended cement built with various combinations of two different high calcium (ASTM Class C) fly ashes and an amorphous silica. A commercial amorphous silica agent of great specific surface was added in binary fly ash-cement (FC) systems in order to compensate for the certain shortfalls associated with the presence of high lime ashes in cementitious blends and furthermore to provide a benchmark for utilizing supplementary cementing materials rich in active silica (such as silica fume, metakaolin and rice husk ash) in resembling ternary systems. For the purpose of this study, both fly ashes were substituted by 5, 10 and 20% amorphous silica and the new blends replaced 20 and 30% of cement. The generated ternary blends were examined in terms of compressive strength development, efficiency factors (k-values) and strength gain. It was found that in the case of 20% cement replacement, up to 10% amorphous silica addition accelerated the strength development of all blends. For higher cement replacement (30%), 5% amorphous silica introduction was the optimum percentage for the blends incorporating high-calcium ashes. Amorphous silica acts immediately after inclusion in the mixture, improving the early strength of all binary systems, while in the later stages of the hardening process, the behavior of all mixtures is highly depended on the active silica content of the ashes they incorporate.
Click here to become an online Journal subscriber