Doboku Gakkai Ronbunshu
Online ISSN : 1882-7187
Print ISSN : 0289-7806
ISSN-L : 0289-7806
SLAKING PROPERTIES OF SHALE ROCK IN THE IZUMI GROUP AND THE SLAKING MECHANISM
Yukinobu YOSHIDAShuzo TAKATAKinutada YOKOTARyuichi YATABE
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2003 Volume 2003 Issue 750 Pages 15-25

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Abstract
Slaking phenomenon lowers the strength of rocks in cut slopes. In Shikoku, the slaking phenomenon is quite prevalent, especially in the Izumi Group where shale rocks containing expansive clay minerals undergo slaking easily. X-ray diffraction tests, however, show no expansive minerals in the shale, which means the slaking of shale is not only due to the swelling of the expansive minerals. Lab tests such as x-ray diffraction tests, analysis of water properties, etc. revealed that the shale undergoes slaking easily because mica and feldspar in it undergo structural changes in presence of water and due to loss of cementation by amorphous minerals.
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© by Japan Society of Civil Engineers
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