This index is obtained from various parameters pertaining to the three basic levels of sustainability: environmental, social and economic, and it determines the structure’s contribution to sustainability. This methodology corresponds to the Integrated Value Method for Sustainable Assessments (IVMSA, MIVES in Spanish), developed by a multidisciplinary group led by the Polytechnic University of Catalonia, LABEIN-TECNALIA and the University of the Basque Country. On the other hand, regarding structures and foundations in Spain, Annex 13 of the Spanish Structural Concrete Instruction (EHE-08) incorporates a methodology that allows us to the evaluate the so-called Index of Contribution of the Structure to Sustainability (ICSS, ICES in Spanish). In fact, the building sector in general has shown increased interest in environmental initiatives. conduct a thorough review on the sustainability agenda in the construction sector while Ahmad researches empirical interactions among the construction sector, energy consumption, urbanisation and carbon emissions. Therefore, sustainability is applicable to different levels or objects, such as a certain sector, a specific activity, a product, a process, a group or an entity. In comparative terms, sustainability is a broader concept than that of sustainable development, since it can be applied effectively to scales below the regional level, as well as to products, processes and services. Understanding the concept of sustainability is the first step in the study and analysis of the current tools used to evaluate environmental impact at a very reduced scale, which includes structures and foundations in general, and in particular those developed in urban areas since construction sites constitute major sources of pollutants provoking negative impacts on the environment. The results of the application of this model to the real case of the foundations of two singular buildings, show the importance that these previously unexamined variables can have when choosing the most sustainable technical solution in terms of CO 2 emissions. This paper proposes a complementary disaggregated model to evaluate the sustainability of variables that are not considered, namely the transportation of materials to the worksite, the commute of workers, the construction process, the emissions of dust, noise and vibrations, as well as the necessary load tests. However, there are variables that, given their specificity and nature, are not contemplated in this methodology (dust, noise and vibration emission, transportation). However, the complexity of homogenising the conditions that affect the execution of each structure, which are of a very heterogeneous and variable nature, in order to be able to evaluate their contribution to sustainability within the same reference framework, is the greatest obstacle and can have a great influence on the representativeness of the obtained results. Having a tool in Spanish regulations to evaluate the sustainability of the construction process in a simple and efficient way (Annex 13 of the Structural Concrete Instruction EHE-08) means an advance with respect to regulations in other countries.
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