Granular Sub Base is a layer in the road foundation just above the compacted sub-grade layer. GSB or granular sub base prevents capillary water from rising; its particle size is so designed that the capillary action stops and cannot go beyond the GSB layer.

2020年8月15日 · The essay emphasises the value of careful subgrade preparation, which involves clearing vegetation and other debris and rolling with a roller with smooth wheels. Also, the study emphasises the necessity of assembling a stock of graded GSB material prior to testing as well as the significance of volumetric mixing of the ingredients.

6 天之前 · Uses of GSB in Construction. GSB plays a vital role in road construction and infrastructure projects. Some of its primary uses include: Base Layer for Pavements: Acts as a foundation for WMM and BC layers.; Load Distribution: Helps in evenly distributing traffic loads.; Drainage System: Prevents water accumulation and enhances road durability.; Strength Enhancement: Provides stability to the ...

2023年4月4日 · Granular Sub Base (GSB) is a naturally occurring or artificially created building material used as a sub-base layer for roads. Highway construction, servicing and road traffic can generate noticeable effects on the surroundings if left unaddressed.

2025年1月6日 · What is a granular sub-base in road construction? If The Thickness of the base layer provided in the design permits, The sub-base layer shall have two sub-layers.⇩. Drainage layer and the filter layer. The upper layer of the sub-base functions as a drainage layer to drain away the that enters through surface cracks.

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

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.

The Granular Sub Base (GSB) layers are used in the flexible pavements to provide a stress-transmitting medium to spread the surface wheel load to a large area so as to prevent the shear and consolidation deformations. Besides these layers are also acting as drainage layer so that capillary water cannot rise above the GSB layer.

2020年5月7日 · In this article we shall discuss about Technical specifications of DBM (Dense Bituminous Macadam), layer thickness, physical requirements, aggregate size, grades and its measurements A-Scope : The work shall consist of construction in a single layer of DBM on a previously prepared base or sub-base.

What is Granular Sub Base (GSB)? GSB is a layer of material used as a sub-base for roads and other structures. It is typically made of crushed stones or gravel, and its thickness can vary depending on the type of project. The primary function of GSB is to provide a stable base for the road or structure to be built upon.