BS EN 16907-4:2018 PDF Download

BS EN 16907-4:2018 standard is applicable to the treatment of various soil types in earthworks construction and maintenance projects, such as roads, railways, airfields, platforms, dykes, and ponds. The standard specifically focuses on the treatment of natural soils, weak rocks, intermediate rocks, chalk, recycled materials, and artificial materials.

This standard applies to the treatment in layers, either in situ or from a mixing plant, rather than treatment by columns or other methods. It establishes requirements for the constituents of the mixtures, outlines the methodology for preliminary laboratory testing, defines the laboratory performance classification, and provides guidelines for execution and control. The standard also includes informative annexes with examples of good practices for execution and control.

The laboratory performance classification specified in this standard covers two types of treatment: improvement and stabilization. The classification for improvement relates to short-term performance, while the classification for stabilization relates to medium to long-term performance.

It's worth noting that EN 16907-4 is specific to improvement and stabilization in earthworks applications, while EN 14227-15, prepared by CEN/TC 227 "Road materials," is for stabilization only in pavement applications. The performance classification for stabilization in EN 16907-4 generally aligns with the laboratory performance classification specified in EN 14227-15, with the exception of a specific performance classification diagram for earthworks in EN 16907-4.