Title:
EFFECT OF VISCOSITY MODIFYING AGENTS ON PERFORMANCES OF CONCRETE
Author(s):
Upendra Neupane, Parnthep Julnipitawong, Somnuk Tangtermsirikul, Akino Yusuke
Publication:
TCA
Volume:
4
Issue:
2
Appears on pages(s):
28-35
Keywords:
Bleeding, Dewatering, High pressure, Viscosity modifying agent
DOI:
Date:
6/1/2016
Abstract:
This study emphasizes the effect of viscosity modifying agents (VMAs) on performance of concrete. The performances of concrete were evaluated in terms of the bleeding and compressive strength of concrete. Additionally, the influence of the VMAs on dewatering of mortar under high pressure was also investigated. Two different types of VMA, namely surfactant and starch ether were used with a fixed dosage of polycarboxylate based superplasticizer in the tested mixtures. All mixtures of concrete and mortar were prepared with the same water to binder ratio at 0.39. Experimental results showed that surfactant type VMA significantly reduced the bleeding, dewatering and slightly reduced the compressive strength of concrete. Whereas the use of starch in concrete mixtures moderately reduced bleeding, slightly reduced the compressive strength of concrete and was ineffective to reduce the dewatering of mortar under high pressure.
Thailand Concrete Association, International Partner Access
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