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: Influence of Sulfates Content in Cement on the Performances of Superplasticizers
Author(s): R. Magarotto, F. Moratti, and N. Zeminian
Publication: Special Publication
Appears on pages(s): 215-230
Keywords: B-naphtalensulphonate; incompatibility; polycarboxylate; sulfates; superplasticizer
Abstract:Extreme performances are required in superplasticizers technology nowadays; the new generation of polymers makes it possible to reach a high water reduction together with a good workability retention, ensuring excellent properties to the hardened concrete. With most of the cements, outstanding performances are achieved with the right combination between cement and superplasticizer; on the other hand, high performing superplasticizer are inevitably highly sensitive to the materials used, and in particular to the cement. Among the parameters that characterize the chemical composition of cement, the sulfate amount and type are recognized as key factors for understanding the reasons of possible problems of incompatibility between cement and superplasticizer; however, little was done on the concrete scale. In this article, five samples of cement containing different amounts of sulfates were selected. The influence of the sulfate content on the performances of PNS- and polycarboxylate-type superplasticizers was evaluated by means of adsorption tests, minislump tests and mortar tests. In the case of addition of sulfates to cement, concrete tests were also made in order to check the results on the concrete scale. The results of this study highlight the importance of an adequate content and balance between the different types of sulfates in cement, in order to guarantee the right interaction with superplasticizers.
Click here to become an online Journal subscriber