Abstract:
The construction sector can be identified as one of the highest energy-consuming
industries in the world. The energy usage of the construction, operation, and
maintenance stages is significant due to the complex nature of the industry. However,
energy is one of the most undervalued resources in terms of efficiency and conservation
in the construction stage. Higher energy usage and energy wastage in construction sites
can be identified as significant matters, and various energy efficiency measures have
massive potential for saving energy during the construction stage. Accordingly, this
paper aims to investigate the sustainable use of energy practices on construction sites in
Sri Lanka. A comprehensive literature review was conducted to identify principles and
practices of sustainable use of energy, energy-using activities, processes, and the most
applicable energy efficiency measures. The research aim was achieved through a
qualitative research approach, and four case studies on building construction projects
were conducted within the Colombo district. The case boundary of the study is defined
as high-rise building sites. Semi-structured interviews, site observation, and document
reviews were carried out as data collection techniques within each case. The collected
data were analysed using manual content analysis. Key findings revealed how to use
energy sustainably, what are the current energy sources and alternative sources
available, construction activities and equipment used in the construction process, and
reduce energy wastage by using energy efficiency measures. Rework, and workers’
behaviour highly affects the energy wastage on the site. Lack of planning, lack of
information, limited space, and poor responses from the construction organisation were
identified as the most relevant barriers that influence sustainable energy use on
construction sites. The proposed recommendations for improving the sustainable use of
energy should be adopted at the project level. Measures exceeding the scope of site
management, industry-level support, and policy intervention are required
