COLOMBO OUTER CIRCULAR HIGHWAY

Project details

Construction of the Outer Circular Highway to the City of Colombo (from Kadawatha to Kaduwela) under the Ministry of Port and Highways Road Development Authority (RDA) which comprises:
– a 4-lane main highway of 8.9 km long
– 2 interchanges
– 21 bridges

High-performance CHRYSO^® concrete admixtures are designed to achieve long workability, cohesiveness, increased strengths and durability.

CHRYSO^®Fluid Optima 100 are used for the 1957 precast girders:
– It required slump retention to deliver the concrete and high early strengths for deshuttering.
– The concrete was cohesive whatever lack of fines and variations of content.

CHRYSO^®Omega 101 and CHRYSO^®Omega 104 are used for Super/Sub Structures including 1700 bored and foundation piles:
– Two CHRYSO^® solutions, specifically adapted to crush sands, soften the concrete without much higher binder dosage.
– 2-hour slump retention achieved at required strength level.

Project participants :

Owner: Road Development Authority (RDA)
Contractor: Taisei Corporation (Japan)
RMC Suppliers, precast Girders: Taisei Corporation
Structural concrete works: Tokyo Supermix
Bored Piles: Access Engineering

CHRYSO expertise

High-performance CHRYSO ® admixtures provide high workability, high strengths, good cohesion of the concrete as well as high durability of the structures.

CHRYSO ® Omega 101 and CHRYSO ® Omega 104 were used for the superstructures and underground works, including 1700 bored piles for the foundations.

Both products are specially adapted for the admixture of concrete with crushed sand without increasing the binder dosage.
2 hours of maintenance obtained at the required resistance level

Project technical challenges

CHRYSO ® Fluid Optima 100 was used for the manufacture of 1957 prefabricated beams.

Result :

Fluid concrete delivered and high early age initial strengths which facilitated the stripping of the beams
Cohesive concrete despite lack of aggregates and variations in local constituents