The Group adopts the “Construction Management Approach” in all its road projects, focusing on planning and management. To ensure maximum cost-effectiveness, the Group sub-contracts out portions of its projects such as relocation of utility services, earthworks, drainage, construction of small bridges, roadside furniture and street lightings. Depending on the projects, the Group may outsource the entire portion or only the labour of these portions, which has low added value.
The outsourcing of labour, which is mainly low-skilled, enables the Group to focus on its core competencies in pavement works.
Cold-in-Place Recyling (CIPR)
This environmentally friendly is very effectively for treating full-depth cracked asphalt pavements. It is a more cost effective alternative to partial or total reconstruction of the cracked pavement. The process involves milling the mixed pavement layers to a maximum depth of 500 mm. The milled pavement is then remixed, with or without new aggregate materials, together with a binding agent before it is laid back. Depending on the condition of the pavement, binding agents such as cement, conventional or modified bitumen emulsion and foam bitumen are used.
Hot-in-Place Recycling (HIPR)
This technique is suitable for restoring wearing course layers experiencing minor rutting and cracking, where the depth of the cracks are less than 60 mm. It is a more superior alternative to the conventional cut and patch method.
The distressed pavement is loosened with a pre-heater and then remixed with new materials and a rejuvenating agent. The remixing is carried out in a onboard pugmill and the mixture is then laid back. The remixing technique is also suitable when used with the laying of a new wearing course on top of pavement requiring additional overlay
This technique is the same as the CIPR except that a mobile mixing plant, which can be easily transported from one site to another, is used. The plant can be quickly set-up without any foundation work. The mobile plant is capable of producing a variety of pavement materials using new Aggregate materials, milling waste or reclaimed asphalt pavement, mixed with either Cement, conventional or modified bitumen. The product is called CHIPmix.