| dc.description.abstract | Demolition is the process of planned fragmentation of elements of construction that
can be total, representing the ruin of the building, or partial, occurred in reforms and
structural changes. However, it is considered as a risk activity, as it is often affected
structural elements, and consequently, the static behavior of the building, and the study
of the demolition project and controlled collapse is left without specific criteria. This
research features a study of national and international standards, guidelines and code
of practices that discuss the project and the useful techniques for demolition of
reinforced concrete structures. In Brazil, the demolition is executed through empirical
methods and often without technical safeguard, since the Brazilian norm that regulated
the contracting and offered guidelines for the execution of demolition services was
canceled. Therefore, were presented a study of the Brazilian norm canceled and
standards of other countries, showing their differences and procedures, as well as the
main current techniques, such as: manual, mechanical, wire rope pulling demolition,
by explosives, wrecking ball, chemical demolition, thermal procedures and by hydrodemolition
with pressure jet. Therefore, the different techniques are presented, the
considerations for project and execution of demolitions and examples of projects
applications, which is presented and discussed the planning criteria. The decision of
the most appropriate method should be made by evaluating the factors of restriction,
cost, availability of equipment and access, distance of neighboring buildings, the state
of the structure and meteorological conditions. Thus, according to what was observed,
it was concluded that a preliminary adequacy of the building to be demolished is
important, to consider the most efficient and effective method in its correct dismantling
and disposal of the waste generated. | |
