Reuse of waste generated by the construction has been seen as an important practice for the environment, the use of the RCC has become every day more, on account of its techniques and its results. Recycling and reusing the rubble of construction if you can promote a culture where all begin an environmental responsibility, making the works become reference to sustainability in the construction area. Besides being slightly compromised with the importance of the impacts to the environment, companies that undertake to join the RCC your profitability and decrease the impacts that will be caused to the environment. This article comes to address the types of materials that can be reused, which your classification in accordance with resolution 307/02 of CONAMA, the techniques that are needed to make the reuse of residue, what are the advantages of doing the reuse, and which impacts of this waste recycling can generate.

The search for constructive alternatives that are more efficient, sustainable and fast in order to increase productivity and to meet the increasing demand of the Market has been one of the great challenges for the construction industry. In order to meet this demand a new construction method known as Light Steel Framing (LSF) has been a great alternative, although it is better known in  developed countries in Brazil, its practice has been diffused and used gaining even more space in the providing a fast and quality construction. In this work a comparative analysis was performed between the Light Steel Framing system and Conventional Masonry through a project of a model house of a floor with the objective of presenting the main differentials between these constructive systems in single family homes. With the projects defined, a quantitative survey of the materials used is done and the compositions of the main elements that differ between both systems are assembled. Through the surveys it was possible to identify the unit costs of each item and to carry out an analysis of the results obtained highlighting the main differences. The results showed that the LSF system presents as an industrialized system presenting higher productivity, having a clean, dry, and sustainable construction, besides presenting low weight, however, in relation to the cost of the work, the study presented the LSF system as less advantageous when compared to conventional masonry, presenting 18,09% more expensive. Knowing that the Light Steel Framing system has so many technical advantages with greater feasibility of execution over the conventional masonry system already proven with this study, it is concluded that professionals in the field of construction should encourage more entrepreneurs and contractor to use this type of construction.

For the accomplishment of this bibliographical research was estimated a range of information that, when entering the main subject of the theme that has as an objective to explain the problems and the effects in which the accidents more specifically the falls in construction sites leads to all involved whether from the responsible for the work to the governmental institutions, to propose the appropriate solutions to this problem that has led to an increase in the statistical numbers of fatal accidents involving these, being they the conscience with their own life and others who in accordance with the rules that, through other studies carried out by employees and placed in standards, dictate certain technical recommendations in which all involved are part, having a notion of the risks involved in their day-to-day work and the appropriate qualifications and prepare them to exercise them.

The concept of a mixed slab or cooperative slab emerged in the United States in the 1950s and has since become widely used, clearly in multi-story metal buildings. Already in Brazil, began to be diffused in the 1970s by the company Robtek (association between the American company Robertson and the Brazilian company Tekno). The slab steel deck or cooperative or mixed slab as it is also known, is a technique used in the construction of slabs in buildings of various sizes. A slab composed basically of galvanized steel sheets or tiles and a layer of concrete. The use of slab with cooperative forms can be considered in industrial buildings projects; in slabs of schools, roads; hospitals and public bodies; airport terminals, walkways or bridges; cinemas and shopping malls; multi-story office buildings. They can be used in concrete structures as well as metal structures. This type of slab is being used a lot, because the speed of execution is much greater, one of the main characteristics said by specialists of the area. In commercial, residential or industrial works, this type of slab is generally applied in works where there is short delivery and the need to rationalize construction processes.

In order to provide acoustic comfort to the human being, over time, different materials and techniques have been developed for application in walls, partitions, ceilings and slabs. Some important materials found on the market are gypsum board, fiberglass, rock wool, EPS (Expanded Polystyrene). Considering the interference that the noise has caused in the buildings, in the present times, and thinking about contributing to the thematic, this work was sought the comparative study, through bibliographical and market research, among the main materials used for acoustic treatment.