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
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: Effect of mineral additives on the setting of blended cement by the maturity method
Author(s): K. Ezziane, E. Kadri, H. Kadri, A. Hallal, R. Duval
Appears on pages(s): 393-401
Keywords: Cement, Slag, Limestone, Natural pozzolan, Setting, Maturity, Activation energy
Abstract:The addition of a mineral additive to Portland cement involves an increase of the setting time allotted to the dilution effect (dilution of the most active ingredient) and to the increase in the necessary water to prepare a normal consistency paste. In this study, ordinary cement was substituted by 5, 15 and 25% of limestone powder, 10, 20 and 30% of natural pozzolan and 10, 30 and 50% of slag. The tests of penetration are carried out every 10 min in order to determine initial and final setting time. The mortar is prepared and preserved at curing temperature of 20, 40 and 60°C. The results are analyzed and quantified by using the maturity method where the effect of each addition appears more explicit. The value of the activation energy calculated at the very early age reveals the state of activity of these mineral additives and their temperature sensitivity. For replacement amounts lower than 15%, the activation energy of the three additives increases at the initial setting and beyond this content a clear difference is observed. At the final setting time, the activation energy remains constant for limestone, increases regularly for slag and increases highly for natural pozzolan with replacement amounts above than 20%.
International union of laboratories and experts in construction materials, systems and structures, International Partner Access.
View Resource »