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3. Laboratory Test Results. Laboratory Test Items. Cylinder specimens, D=5cm, L=10cm, are used for laboratory test. Soil strength is determined by Unconfined Compression Test. The spectral characteristic is measured by optical spectrometer. An example of weathering.

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Laboratory test items
Laboratory Test Items

  • Cylinder specimens, D=5cm, L=10cm, are used for laboratory test.

  • Soil strength is determined by Unconfined Compression Test.

  • The spectral characteristic is measured by optical spectrometer.


An example of weathering
An example of weathering

Liaozhong Jing (Mar.30.2002)


Weathering induced surface change
Weathering-induced surface change

outdoor-exposure test using a cylinder specimen

Start day

after 90 days

after 120 days

deterioration processcaused by weathering


Test case
Test Case

Series N : without Relics Preservation Admixture (TOT) Series P : with Relics Preservation Admixture (TOT)

TOT has developed by Tanaka Geology Consultants, Co.Ltd.


Unconfined compression test results series n not used tot
Unconfined Compression Test Results-Series N (not used TOT)-

deterioration process caused by weathering

The peak value of Stress is called Unconfined Compression Strength (soil strength).


Unconfined compression test results series p used tot
Unconfined Compression Test Results-Series P (used TOT)-

deterioration process caused by weathering

Because of TOT effects, the peak values became larger than Series N.


Comparison of results
Comparison of Results

Unconfined Compression Strength: Peak value of Stress on unconfined compression test result


Spectral characteristics series n
Spectral Characteristics-Series N-

deterioration process caused by weathering


Spectral characteristics series p
Spectral Characteristics-Series P-

deterioration process caused by weathering



Relationship between soil strength and the spectral characteristic1
Relationship between Soil Strength and the Spectral Characteristic

exponential relationship between them

This figure shows a possibility of soil state monitoring from satellite imageries.


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