CTCI leads its peers in designing a circular economy model in construction engineering with its core capabilities, including three main aspects, i.e., resource recycling supply, resource recovery, and product and asset life extension. These also match three other aspects, namely strategy formulation, management and execution, and business development. In terms of resource recycling supply, CTCI proactively provides renewable, recyclable, biodegradable resources, and changes product design thinking appropriately. In terms of resource recovery, when carrying out EPC maintenance work, CTCI would make every possible effort to convert waste materials into resources instead of downgrading them for recycling. In terms of extending the life of products and assets, CTCI tries to maintain their economic efficacies through professional repairing, upgrading and remanufacturing.
CTCI takes into account factors such as durability, maintainability, VOCs, hazardous substances, radiation hazard, and life cycle impact assessment. For instance, we have widely adopted the polyvinylidene difluoride (PVDF) coating in coated steel roofs and walls to reduce maintenance needs for the external structures of coastal plants. To effectively minimize the spills of VOCs, we use low- emission valves in our designs to reduce the fugitive emissions of the valve, upgrading from 1,000 ppm emission valves to below 100 ppm, thus lowering the impact on the staff and environment during plant operations.
In terms of hydrocarbon plants, we always use paints and coatings to avoid corrosion and damage to equipment, structures, and piping and other facilities caused by moisture and chemicals in the air. And to minimize the paints’ hazardous effects on human bodies, we would select paints that meet the environmental protection standards during the design phase. Furthermore, by using the newly-introduced life cycle cost analysis software (EEA), we can calculate energy consumption and the costs incurred within the entire life cycle.
In short, each project is analyzed based on a 20-year life cycle.
▼ Use of Materials
Water consumption of the headquarters building in 2019 has reduced by 4.5% compared to that in 2018, reaching our preset reduction target. As to the source of water resources, the water used in the headquarters building comes directly from tap water provided by public utility. There are no other water sources. Wastewater is discharged into sewers. In addition to minimizing water resource wastage by widely adopting sensor faucets that can control the quantity and duration of water flow, we have also made many water conservation signs to remind employees to conserve water. Moreover, we install rainwater collection systems on the roof of the headquarters building and construction sites for vegetation watering and for construction uses. Apart from setting headquarters building’s daily water consumption as one of our efficiency improvement goals, we have also come up with measures to reduce water consumption during construction. We began quantifying our water recycling and saving amount, which includes rainwater and surface runoff water recycled from the current sediment basin, leaked water from barrels and troughs, and water used in pressure tests. In 2019, the water consumption target was not achieved because some of our large-scale projects are at their construction peaks, as well as there are many people at the sites.