What Is The Compaction Factor For Gsb: Understanding Density In Road Construction

“What compaction method is recommended for Granular Sub-Base (GSB) construction? When dealing with a substantial layer thickness, it’s advisable to perform compaction for a thickness of 175 mm, compacted down to 150 mm, utilizing surface vibrators. This approach ensures the necessary compaction levels are achieved for the GSB material.”

Could you please provide more context or information about what “GSB density” refers to? Without additional information, it is challenging to rewrite the paragraph and add missing details to help readers better understand the topic. Please provide more context or specify what “GSB density” relates to, and I’ll be happy to assist you further.

Table 1 presents the specifications for Grading I and Grading II of Close-graded Granular Sub-Base (GSB) materials. These specifications outline the particle size distribution of GSB materials as determined by the IS Sieve Designation. For Grading I, the material should have particles ranging from 26.5 mm in size, with a distribution between 55% and 75%. In contrast, Grading II requires particles in the same size range but with a distribution between 25% and 45%. Furthermore, the specifications indicate the fines content, particles smaller than 4.75 mm, which should be less than 10% for both Grading I and Grading II. Additionally, the minimum CBR (California Bearing Ratio) value, which is a measure of material strength, is specified as 30 for Grading I and 20 for Grading II. These standards help ensure that GSB materials meet specific size and strength criteria, making them suitable for their intended construction applications. The source of this information is dated January 27, 2018.