Analysis Of Chloride Transport And Storage
Properties Of High Performance Concrete
Modified By Fly Ash Addition As An Effective Tool
For Assessment Of Its Durability
Author(s)
Z. Pavlík, M. Pavlíková, L. Fiala, H. Benešová,
J. Mihulka & R. Černý
Abstract
The effect of fly ash addition on moisture and chloride transport and storage
properties of high performance concrete is studied. For comparative reasons, the
samples of reference Portland cement concrete without fly ash are analyzed as
well. A basic characterization of investigated materials is performed using
determination of bulk density, matrix density and total open porosity. Chloride
binding isotherms are measured by modified adsorption method. For the
determination of chloride transport properties, two different experiments are
performed. At first, the chloride transport is characterized by the water and
chloride solution absorption coefficients resulting from the standard sorption
test. In the second experiment, and moisture diffusivity as function of moisture
content, and chloride diffusion coefficient as function of chloride concentration
are calculated by inverse analysis. On the basis of obtained material parameters
describing the moisture and salt transport and storage, the durability of fly ash
modified high performance concrete is assessed and compared to reference
material.
Keywords: high performance concrete, fly ash, chloride transport and storage.
1 Introduction
Portland cement based concrete is considered to be versatile material having high
durability and utility properties. However, in severe climatic conditions, concrete
Keywords
high performance concrete, fly ash, chloride transport and storage
Related Book
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