BS 1377-9:1990 PDF Download

BS 1377-9:1990 is a standard that provides guidance on in-situ tests for soils used in civil engineering. In-situ tests are conducted directly on the soil in its natural location, rather than in a laboratory setting. The standard organizes the test methods into different groups based on their purpose or mode of execution.

There are five methods described in the standard for determining the in-situ density of the soil. These methods involve measuring the density of the soil in place, which is important for understanding its compaction characteristics and potential for settlement.

The standard also includes three methods for determining penetration resistances. These tests assess the soil's resistance to penetration and provide information on its strength and compaction properties.

Additionally, the standard outlines four methods for determining the vertical deformation and strength characteristics of the soil. These tests are crucial for evaluating the stability and load-bearing capacity of the soil in civil engineering projects.

Lastly, there are two methods for assessing the in-situ corrosivity characteristics of the soil. These tests help determine the potential for corrosion of structures or equipment that come into contact with the soil.

BS 1377-9:1990 is an updated version of the in-situ test methods described in BS 1377:1975. The newer version supersedes the previous one and provides more current and comprehensive guidance for conducting in-situ tests on soils used in civil engineering.