MARE - Marine and Environmental Sciences Centre, Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal.
MARE - Marine and Environmental Sciences Centre, Department of Environmental Sciences and Engineering, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal.
Waste Manag. 2021 Dec;136:295-302. doi: 10.1016/j.wasman.2021.10.032. Epub 2021 Nov 1.
Due to the relevance of construction and demolition waste (CDW) generation for circular economy and reduction of environmental impacts, it is important to evaluate the factors leading to constraints regarding waste. Previous researchers have assessed construction company attitudes and behaviors toward CDW management, but factors such as the presence of environmental technicians, registration of the CDW generated, commitment to the legal framework, the subcontracting regime, and construction works' oversight were rarely addressed in terms of the differences existing within the construction sector. Thus, the objective of this research is to evaluate the relationship of these factors with construction company size. A questionnaire was sent to Portuguese construction companies, and 652 responded. The sample was divided into three groups: micro, small, and medium/large companies. Statistical data treatment was carried out to assess whether there were statistically significant differences in the mentioned factors between groups. The main conclusions highlight: the prevalence of environmental technicians working in larger companies; the registration on waste platforms being only performed consistently by medium/large companies; a considerable proportion of micro and small companies having knowledge gaps about the practices adopted; the responsibility for CDW management within the subcontracting regime being mainly from subcontractors; and the presence of a gap regarding onsite construction works oversight. These differences lead to the need to reevaluate the strategies for CDW management and adapt the strategies to the specific conditions of the construction sector, including the size of construction companies.
由于建筑和拆除废物（CDW）的产生对循环经济和减少环境影响具有重要意义，因此评估导致废物产生的限制因素非常重要。先前的研究人员评估了建筑公司对 CDW 管理的态度和行为，但在建筑行业内部存在差异的情况下，很少涉及环境技术人员的存在、CDW 的登记、对法律框架的承诺、分包制度以及建筑工程监督等因素。因此，本研究的目的是评估这些因素与建筑公司规模的关系。向葡萄牙建筑公司发送了一份问卷，共有 652 家公司做出了回应。该样本分为三组：微型、小型和中型/大型公司。进行了统计数据分析，以评估这些因素在组间是否存在统计学上的显著差异。主要结论强调：在较大的公司中普遍存在从事环境技术工作的人员；只有中型/大型公司才会一致地在废物平台上进行登记；微型和小型公司中有相当一部分对所采用的做法存在知识差距；在分包制度中，CDW 管理的责任主要来自分包商；以及施工现场监督方面存在差距。这些差异导致需要重新评估 CDW 管理策略，并根据建筑部门的具体情况（包括建筑公司的规模）调整策略。
