This paper examines the process through which a construction project’s implementation of green practices in its site processes influences its economic performance by meeting environmental performance standards. The uniqueness of this study stems from its focus on practices carried out on the construction sites, and the consideration of project economic performance as against corporate level performance. A conceptual model is proposed and tested using a sample of 168 construction projects completed by class A contractors in Nigeria. The data were analysed through the Partial Least Squares Structural Equation Modelling (PLS-SEM) technique. Results obtained showed that the model satisfied all the criteria for both the measurement model and structural model for formative constructs. The study results indicate that environmental performance only partially mediates the relationship between green construction site practices and economic performance. The results imply that, it is not in all occasions that a project meeting environmental performance standard will result in the construction project been economically profitable, as adopting green construction site practices could lead to economic performance without necessarily performing environmentally. It is recommended that contractors should exhibit some level of flexibility while adopting green practices on site in order to achieve a balance between green practices, environmental performance and economic performance.

本文研究了建筑项目在现场过程中实施绿色实践的过程，该过程通过符合环境绩效标准来影响其经济绩效。这项研究的独特性源于其对施工现场实践的关注，以及对项目经济绩效与企业水平绩效的考虑。提出并使用尼日利亚A级承包商完成的168个建设项目样本对概念模型进行了测试。通过偏最小二乘结构方程模型（PLS-SEM）技术分析数据。获得的结果表明，该模型满足了用于形成性构建体的测量模型和结构模型的所有标准。研究结果表明，环境绩效仅部分中介了绿色建筑工地实践与经济绩效之间的关系。结果表明，并非所有情况下符合环境绩效标准的项目都会使建设项目在经济上获利，因为采用绿色建筑工地做法可能会导致经济绩效，而不必一定在环境方面表现良好。建议承包商在现场采用绿色做法时应表现出一定程度的灵活性，以在绿色做法，环境绩效和经济绩效之间取得平衡。并非在所有情况下，符合环境绩效标准的项目都会使建设项目在经济上获利，因为采用绿色建筑工地做法可能会导致经济绩效，而不必一定在环境方面表现良好。建议承包商在现场采用绿色做法时应表现出一定程度的灵活性，以在绿色做法，环境绩效和经济绩效之间取得平衡。并非在所有情况下，符合环境绩效标准的项目都会使建设项目在经济上获利，因为采用绿色建筑工地做法可能会导致经济绩效，而不必一定在环境方面表现良好。建议承包商在现场采用绿色做法时应表现出一定程度的灵活性，以在绿色做法，环境绩效和经济绩效之间取得平衡。