Title:
INVESTIGATION OF ALKALI-SILICA REACTIVITY POTENTIAL OF AGGREGATE SOURCES IN THE EASTERN PART OF THAILAND
Author(s):
Suvimol Sajjvanich, Watcharakorn Wongkamjan, Krish Wongin, Monn Sarikajit, Rojana Kandapapong
Publication:
TCA
Volume:
2
Issue:
2
Appears on pages(s):
1-9
Keywords:
Lithology, Alkali-Silica Reaction (ASR), Petrographic Analysis, Uranyl Acetate, Thin Section, Reaction Rim
DOI:
Date:
6/1/2014
Abstract:
This paper reports the study of ASR expansion potential of different aggregate types which were randomly collected from some sources in the eastern coast of Thailand (three different lithology based-rocks are metamorphic, igneous, and sedimentary rocks). The samples were tested using several methods namely; Petrographic Analysis, Accelerated Mortarbar Test (AMBT), Accelerated Concrete Microbar Test (ACMT), Uranyl Acetate Gel Fluorescence Test and Microscopic Characteristics Analysis using digital stereo microscope. The aggregates in this study were Calc-silicate, Granite, Limestone and Greywacke. The results showed that aggregates of the same type but from different sources were similar in mineralogical compositions and chemical compositions. The AMBT expansion results indicated the larger expansion of samples in sedimentary group than the suggested values of the standard which indicated the potential ASR deleterious expansion. The uranyl acetate test of micro bars sample indicated the evidence of ASR gel at aggregates’ rims as well as inside aggregate particles. These findings supported the expansion results. Also, the studies of thin section revealed the evidence of ASR gel at the aggregates’s rim, inside the aggregates and in the matrix.
Thailand Concrete Association, International Partner Access
View Resource »