Title: Effects of Chemical Admixtures onColloidal Underwater Concrete

Author(s): M. Kawakami, S. Wada, and K. Suzukawa

Publication: Symposium Paper

Volume: 119

Issue:

Appears on pages(s): 493-516

Keywords: admixtures; air-entraining agents; concretes; pH; plasticizers; setting (hardening); strength; turbidity; underwater construction; water-reducing agents; workability; Materials Research

DOI: 10.14359/2550

Date: 9/1/1989

Abstract:
Describes the effect of superplasticizer (SP) and air-entraining water-reducing admixture (AE-WRA) on spread, turbidity, pH, flowability, setting time, and compressive strength of colloidal underwater concrete. In summary, the studies resulted in the following conclusions: Spread was affected considerably by the SP and was not controlled by the AE-WRA; turbidity was affected by both SP and AE-WRA when the apparent viscosity of the concrete was low; pH was affected somewhat by the SP and AE-WRA; flowability was affected considerably by the SP; setting time was affected by both SP and AE-WRA when water-cement ratio was lower; the strength of underwater concrete was not affected by SP or AE-WRA amounts.