Banca de DEFESA: OLÍMPIO JOSÉ TORRES MENDONÇA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : OLÍMPIO JOSÉ TORRES MENDONÇA
DATE: 02/06/2023
TIME: 09:00
LOCAL: meet.google.com/xmr-gpbj-usd
TITLE:

Use of RCD for the production of Non-Structural Concrete Blocks.

KEY WORDS:

construction and demolition waste; recycled concrete block; environmental legislation.

PAGES: 130
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

The disposal of construction and demolition waste (CDW) has been a recurrent problem in Brazilian cities, especially in places with difficult access, such as neighborhoods located on hills and which are considered places of vulnerability. The objective of this research work is to seek alternatives for the reuse of this type of waste, especially Class A (CONAMA Resolution 307, 2002). According to CONAMA Resolution 307 (2002), Class A waste is reusable or recyclable waste in conditions to be used as raw material or product. Faced with the need to reduce the environmental impact, in the extraction of natural aggregates, an alternative has been sought that aims at this reduction, the reuse of RCD, as an aggregate, has been a viable solution, as they can be used in the manufacture of pre-processed products. simple concrete moldings. This research carried out the collection of RCD, in the neighborhoods located in hills of the city of Recife, then the RCD passed through a simple crushing process, where the recycled coarse aggregate (AGR) was obtained, after this step, the characterization was carried out in laboratory, both natural aggregates (AN) and recycled aggregates. After the characterization of the AGR (granulometry curve, percentage of water absorption, specific mass), the percentage of substitution of the natural coarse aggregate by the recycled coarse aggregate was defined, with percentages of 0%, 25%, 50% and 100%, the blocks were produced manually. Physical and mechanical tests of the blocks were carried out  (dimensional analysis, net and gross area, specific mass, resistance to compression and percentage of water absorption), the tests carried out in the laboratory of SENAI/PE. It is concluded that in this research work, the relationship between the percentage of RCD and its specific mass is inversely proportional, from the decrease in the density of the blocks, with the decrease in the compressive strength of the samples. The molding process was manual, that is, the low compaction of the concrete inside the mold contributed to the loss of compressive strength and decrease in specific mass, as well as an increase in the water absorption index. Regarding the production costs of the BCR (Recycled Concrete Block), even having faced an atypical period in relation to the costs of inputs, due to the COVID-19 pandemic, it proved to be viable.

COMMITTEE MEMBERS:
Externa ao Programa - 2321565 - CECILIA MARIA MOTA SILVA LINS - nullPresidente - ROMILDO MORANT DE HOLANDA
Interno - VICENTE DE PAULO SILVA