No abstract

The construction sector affects the environment through CO₂ emissions generated by the use of massive quantities of materials, energy, and wastes during the construction and demolition processes. Moreover, current technology offers a wide variety of materials, products, and systems that could be used for a similar solution; however, the decision to select one or other element lies with the price and then by regulatory requirements and availability (ignoring the issue of sustainability). In a building, the pavements are one of the elements with major representativeness and with more possibilities of alternative variables in their materials; accordingly, this research exposes three different types of pavements with similar prices, comparable functions, and normative compliance, but providing a new sustainable perspective: The construction and demolition waste (C&DW) analysis. The results show the differences between the waste generated from each type of pavement, stressing that the application of sustainable management criteria can be significant for sustainable buildings construction. This research shows a new criterion applicable to the construction sector that could improve the selection (with equal requirements) of one type of pavement into a more environmentally friendly pavement; allowing the achievement of profits for builders.

The kinetic study of the synthesis of nopol from β‐pinene and formaldehyde generated ex‐situ was carried out in a continuous flow process using Sn‐MCM‐41 wall‐coated microreactors of 1/8“ stainless steel tubes. The presence of Sn2+ and Sn4+ species was identified through XPS and TEM; the homogeneous distribution of tin on the support throughout the surface of the coating was verified by SEM analysis. Taylor flow regime and the kinetic control of the reaction were verified with hydrodynamic studies. A determination coefficient of 0.92 was obtained for the mathematical adjustment of the equation that described the reaction pathway obtained under the assumption of a dual‐site Langmuir‐Hinshelwood formalism with product desorption as the limiting step.