3 laboratory test results
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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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3. Laboratory Test Results

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3 laboratory test results

3. Laboratory Test Results


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 characteristic

Relationship between Soil Strength and the Spectral Characteristic


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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