Road Construction – CGBM/SRP
Cement Grouted Bituminous Mix (CGBM), also known as Semi-Rigid Pavement (SRP), is an alternative solution to overcome limitations caused by conventional pavements like Flexible (asphalt concrete) and Rigid (cement concrete) pavements. This new pavement technology presents a composite paving mix comprising of high void open-graded asphalt concrete impregnated with special cementitious topping grout.
CGBM has proven effective with a track record of over 50 years. It is widely implemented in Europe, the USA, and Asia Pacific (Australia, China, Malaysia, Japan, Singapore, etc). CGBM is mainly used in the construction of roads, highways, bus
Performance Comparison of Various Road Surfaces
| Properties | Concrete Pavement | Asphalt Pavement | CGBM / SRP |
|---|---|---|---|
|
Resistance to rutting |
Good |
Poor |
Good |
|
Skid resistance |
Poor |
Good |
Good |
|
Resistance to petroleum
products, Chemicals |
Good |
Poor |
Good |
|
Resistance to moisture
damage |
Good |
Poor |
Good |
|
Movement joints |
Required |
Not Required |
Not Required |
|
Service life |
Very Long |
Short |
Long |
|
Ease of maintenance /
Repair |
Difficult |
Easy |
Easy |
Typical Design of Cement Grouted Bituminous Mix
Specially Formulated Grouts for Cement Grouted Bituminous Mix (CGBM) / Semi-Rigid Pavement (SRP) applications:
ProSec 905
Ultra-high strength, polymer-modified cementitious topping grout (LTA approved)
ProSec 905E
High strength, polymer-modified cementitious topping grout. Economical Grade.
ProSec 905EC
High strength, polymer-modified grout concentrate. Cost-Effective choice.
ProSec 905 meets the stringent requirements set out by Singapore’s Land Transport Authority (LTA) and is
approved for use in Semi-Rigid Pavement construction.
ProSec 905, ProSec 905E and ProSec 905EC meet the criteria set out in India Road Congress (IRC)’s SP:125-
2019 [Guidelines For Cement Grouted Bituminous Mix Surfacing For Urban Roads].