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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: Relative Efects of Ca-Polystyrene Sulfonate and Na-Sulphonate-Based Superplasticizers on Properties of Flowing Concrete
Author(s): Y. Sekiguchi, T. Okada, and T. Ukigai
Publication: Special Publication
Appears on pages(s): 157-170
Keywords: air entrainment; alkali-aggregate reactions; bleeding (concrete); calcium; compressive strength; concretes; naphthalene; plasticizers; polystyrene; setting (hardening); sodium; sulfonate; workability; Materials Research
Abstract:Effects of calcium polystyrene sulfonate-based superplasticizer (SP.PSS-Ca) and sodium b-naphthalene sulfonate-based superplasticizer (SP.NSF-Na) on concrete behavior were studied. The SP.PSS-Ca does not contain sodium and potassium (Na, K), the cause of alkali-aggregate reaction, and hence is less harmful than SP.NSF-Na. SP.PSS-Ca gave a larger increase of slump, smaller increase of air content, smaller air loss, and slump loss than SP.NSF-Na at the same dosage. The dosage of SP.PSS-Ca was 70 percent of that required for SP.NSF-Na to obtain the required slump. SP.PSS-Ca did not increase the air content to flowing concrete of base concrete, but SP.NSF-Na increased it. SP.PSS-Ca showed lower air loss and slump loss (0.6 percent, 3.5 cm/90 min) than SP.NSF-Na (2.0 percent, 7.0 cm/90 min). Other properties such as bleeding, setting time, and compressive strength were similar with SP.PSS-Ca and SP.NSF-Na. Thus SP.PSS-Ca can be considered to have better properties as a superplasticizer than SP.NSF-Na.
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