Title:
Study of the Application of Viscosity
Reducing Type Superplasticizers for Low
Water-Binder Ratio Concrete
Author(s):
T. Matsumoto, T. Sugiyama, and A. Ohta
Publication:
Symposium Paper
Volume:
262
Issue:
Appears on pages(s):
177-186
Keywords:
high-strength concrete; low-heat cement; moderate-heat cement; polycarboxylate; self-compacting concrete; viscosity reduction.
DOI:
10.14359/51663231
Date:
10/1/2009
Abstract:
In low-water/binder-ratio concrete such as high-strength concrete (HSC)
or self-compacting concrete (SCC), concrete workability decreases due to the high viscosity of the concrete as a result of its mixture components and proportion. It is considered that a reduction in concrete viscosity is significantly advantageous for placement of HSC or SCC. In this study, the authors add viscosity reducing type superplasticizers to the formulation of low-water/binder-ratio concrete. As a result, it is found that viscosity reducing type superplasticizers can reduce the viscosity of cement paste in concrete; moreover, the time to achieve a 500 mm (19.7 in.) slumpflow (an index of concrete workability) can be reduced. Accordingly, it is confirmed that application of viscosity-reducing superplasticizers can effectively improve the
workability of HSC or SCC.