|
KMID : 0385520120250010033
|
|
Analytical Science & Technology
2012 Volume.25 No. 1 p.33 ~ p.38
|
|
|
A study of semi-quantification of the Friedel`s salt using the X-ray diffraction method in concrete
|
|
Lee Ho-Jae
Lee Jang-Hwa
Kim Do-Gyeum
|
|
|
Abstract
|
|
|
|
Despite the importance of chloride binding, it is very difficult to measure the binding capacity, in particular, for the concrete body in an existing structure: in fact, the measurement procedure for chloride binding is much influenced by the environmental condition such as temperature, fineness of sample and pore water extraction techniques. The present study concerns the quantification of the binding capacity of chloride ions in concrete using the X-ray diffraction (XRD) technique. Once the binding isotherm of chlorides was determined by the Langmuir isotherm, as a function of the W/C, curing age and binder type, the generation of bound chlorides (i.e. Friedel’s salt) was simultaneously ensured by the XRD technique. The amount of bound chloride was then determined by analyzing the peak intensity for the bound chlorides in the XRD curve. It was found that an increase in the curing age and a decrease in the W/C resulted in an increase in the binding capacity.
|
|
|
KEYWORD
|
|
|
chloride, binding, X-ray diffraction, isotherm, corrosion,
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|