Research Project Title

Geotechnical Engineering Properties of Mt. Mazama Ash and its Influence on the Strength of Latah Creek Floodplain Soils

Session Type

Poster Presentation

Research Project Abstract

We tested Mt. Mazama ash from the Latah Creek area of Spokane for the geotechnical engineering properties according to ASTM standards. We determined the specific gravity, Atterberg limits, particle size distribution, and the optimum water content for compaction. We then conducted a series of Unconfined Compressive Strength tests on the Mt. Mazama ash to determine its behavior under stress. We conducted three strength tests with varying amounts of compactive effort to determine how the ultimate and yield strength changed with the increased compactive effort. We then looked at the behavior of previously tested Latah Creek floodplain soils with Mazama ash interbeds. Each soil behaved differently with ash interbeds, the presence of the ash increased the strength of Latah soil 1 and reduced the strength of the Latah soil 2.

Session Number

PS3

Location

HUB Multipurpose Room

Abstract Number

PS3-aa

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COinS
 
Apr 28th, 2:15 PM Apr 28th, 3:45 PM

Geotechnical Engineering Properties of Mt. Mazama Ash and its Influence on the Strength of Latah Creek Floodplain Soils

HUB Multipurpose Room

We tested Mt. Mazama ash from the Latah Creek area of Spokane for the geotechnical engineering properties according to ASTM standards. We determined the specific gravity, Atterberg limits, particle size distribution, and the optimum water content for compaction. We then conducted a series of Unconfined Compressive Strength tests on the Mt. Mazama ash to determine its behavior under stress. We conducted three strength tests with varying amounts of compactive effort to determine how the ultimate and yield strength changed with the increased compactive effort. We then looked at the behavior of previously tested Latah Creek floodplain soils with Mazama ash interbeds. Each soil behaved differently with ash interbeds, the presence of the ash increased the strength of Latah soil 1 and reduced the strength of the Latah soil 2.