2020年5月22日 · GSB :- Granular sub base or GSB is a typical layer adopted in highway construction, which is laid above the subgrade and below the crust materials. Naturally available material consisting of various grades may be used for GSB, the largest grain size up to 65mm.

If Gsb > Gse, then it would mean that the asphalt absportion is negative; if Gse > Gsa, then it would mean that the aggregate absorbs more asphalt than water – both non-sensical results. One of the most important policies an agency makes is determining who sets the Gsb for the aggregates used in mix designs.

Bulk Specific Gravity (also known as Bulk Dry Specific Gravity): The ratio of the weight in air of a unit volume of aggregate at a stated temperature to the weight in air of an equal volume of gas-free distilled water at the stated temperature.

This article includes GSB Grading, layer thickness, Water absorption, Physical requirements (like liquid limit, Plasticity index ,AIV), construction procedure or Rolling , measurement and treatment of GSB

Determining RAP Gsb •Gsb of aggregates in RAP is not typically known •Gse of RAP has historically been used as a substitute for Gsb in mix designs

2009年3月1日 · The Gsb (dry) is the specific gravity when water is considered to have penetrated all the effective voids in the coarse aggregate while the apparent specific gravity (Gsa) determines the specific gravity without factoring any penetration of water into the permeable voids.

2020年5月7日 · Granular Sub base (GSB) specifications, GSB Grading, layer thickness, Water absorption, Physical requirements (like liquid limit, Plasticity index ,AIV), construction procedure or Rolling , measurement and treatment of GSB as per MORTH 5th revision and Indian standard in Civil engineering

Several methods are available for determining the bulk specific gravity (Gsb) of reclaimed asphalt pavement (RAP). However, a clear recommendation has not been had for determining this property. In this study, asphalt mixes with known aggregate properties were produced and aged in the laboratory to simulate RAP.

This document describes specifications for granular sub-base materials and construction. It defines the materials that can be used, including natural sand, crushed gravel, crushed stone, and crushed slag. It provides grading tables and physical requirements for the materials.

Gsb for reclaimed asphalt pavement (RAP) aggregate should be based on a method proven to provide the most suitable values for the aggregates used in the state. Gse should not be used for RAP.