FLATGEO Consulting Co., Ltd.

List of Standards

List of Standards

The list of standards (ASTM, BS and TCVN) which are commonly used in...

Holiday calendar in 2023

Holiday calendar in 2023

Date Number of days off 2024  New Year's...

Upcoming Events

Upcoming Events

Upcoming events Date Location The 21st Southeast Asian...

Standard Penetration Test

Standard Penetration Test

Standard penetration test (SPT) is one of the most common in situ testing...

Precision or Accuracy ???

Precision or Accuracy ???

When working with technical documents, readers are often deal with specific...

Bulk Density

Bulk Density

1. Definition: A bulk density of a soil sample is defined as a mass per...

Compaction Test

Compaction Test

1. Definition: The bulk density or dry density of soils is not a constant...

Warning on Webpage Content Stealing

Warning on Webpage Content Stealing

On February 27, 2014, flatGEO Consulting Co. accessed to a webpage on...

  • List of Standards

    List of Standards

    July 18, 2011
  • Holiday calendar in 2023

    Holiday calendar in 2023

    October 2, 2011
  • Upcoming Events

    Upcoming Events

    December 3, 2011
  • Standard Penetration Test

    Standard Penetration Test

    December 12, 2011
  • Precision or Accuracy ???

    Precision or Accuracy ???

    January 7, 2012
  • Bulk Density

    Bulk Density

    February 20, 2012
  • Compaction Test

    Compaction Test

    March 7, 2012
  • Warning on Webpage Content Stealing

    Warning on Webpage Content Stealing

    February 27, 2014

Slide10 Standard penetration test (SPT) is one of the most common in situ testing methods. SPT test is used to roughly estimate the strength of subsurface soils.

SPT test in 1950

(Source: http://www.vulcanhammer.net/geotechnical/laboratory_field.php)

Albert Mauritz Atterberg1. Atterberg limits:

A soil sample will expose its consitency when it is composed of some clay and silt fractions and has some moisture content. The consistency of a soil sample will change in relation to the changing of moisture content. This relationship is presented by Albert Mauritz Atterberg in the following figure:

Slide01 liquid limitA liquid limit is one of important physical properties of a soil sample for soil classification. In principle, Atterberg limits (including liquid limit, plastic limit, shrinkage limit) must be unique and typical for each soil sample. However, in practical, the liquid limit is not unique at all and varies with the testing equipment, testing method and even the emotions of operators (!)