NORMA DE DESEMPENHO NBR 15575 DOWNLOAD

In order to verify the airtightness failure, a cotton wad, previously dried in a stove, was positioned near the fissures, detected with the support of a thermographic camera, for a period of 10 seconds. Building acoustics, 6 3 , pp. It is possible to verify that both samples had an accentuate sound reduction index in Hz provided by their stiffness, decreasing and differing in the others low frequency bands, characteristic of the coincidence valley commented by Fringuellino and Smith , in the first resonance controlled zone, varying as a function of the damping mechanisms of each brick composition. The test of suspended vertical loads was reproduced in 2 two walls by a maximum eccentric vertical load of 0. No occurrence of failures that compromised the serviceability limit state. In addition to the technical advantages associated with this technology, issues related to sustainability have called attention to the gypsum components. For the energy of 10 J, there was no complete penetration of the steel sphere as shown in Figure 10b.

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For the RGP pastes, the initial setting time was evidenced in the 7th minute, with a temperature of The test is similar to Pinheiro and consists of checking the diameter formed by the gypsum plaster paste when flowing on a glass slide.

Nbr 15575-1 pdf

Although walls made of this material exhibit satisfactory performance levels for the tests of suspended vertical load as well as hard and soft body impact, it is not known whether this behavior remains intact for gypsum blocks made with recycled gypsum plaster waste, as far as we know there are no publications on the performance of walls made with this material. The gypsum plaster waste is still faced a serious economic and environmental problem.

In relation to the impacts desempenyo energy of 10 J safety impactsno ruin occurrence was observed, which is characterized by the rupture of the wall or complete penetration of the steel sphere ultimate limit stateas detailed in Table 4. Behavior under the action soft body impact The results of the soft body impact test showed that the RGB dese,penho satisfactorily withstand the energies provided by use and safety impacts.

Table 3 shows the records of the loads used and the criterion established in the performance standard for the test. On fire resistance, the difference in the geometries of the bricks that 115575 the two samples promoted a higher discrepancy on their performance. The prolongation of these cracks occurred along the block, axially.

Nbr pdf download

Acoustics - Laboratory measurement of sound insulation of building elements - Part 4: The displacements observed during the test, both instantaneous and residual, were below normatively specified, as shown in Figure The blocks produced with nrb of 70 x x mm similar to the conventional block were driven for drying in the open air for 10 days and stored on pallets until conveyed for testing.

Then the sphere 5 kg is removed until its center of mass reaches the drop height "h" required to produce 2.

The results for conventional gypsum blocks are satisfactory, according to Pires Sobrinhobecause their load capacity is higher than those presented by the small walls made from ceramic bricks and concrete blocks. Thus, for this study, the instantaneous displacement limit was The wall remained normw and the fastening system without significant displacements for a maximum load of 0.

Norma De Desempenho NBR 15575

Fire-resistance requirements for building construction elements - Norrma. In this way, when comparing them with the walls of RGB, it is verified that the system developed with recycled material presents better performance.

desempehho Thus, the RGB for internal vertical sealing points to a satisfactory potential, if exposed to conditions of use, in the overall of buildings. Measurement procedures and requirements. DYNA, 85pp. Table 1 Tested samples. According to Lordsleem Junior and Nevessome of these advantages can already be highlighted: In this way, sample A1 had a sensitive superior performance when compared to A2.

Blocos de gesso reciclado: desenvolvimento e avaliação de desempenho

Hydraulic installations to fight fire into buildings. The Setting of Gypsum Plaster: For this, a physic-chemical recycling process of gypsum plaster waste was carried out on an industrial scale and the developed material was characterized in anhydrous and fresh state.

Figure 6 Average temperature of the non-exposed face of sample A2. It is also observed that there was no stabilization of the temperature of the non-exposed face, referred to above and occurred in system A1, impairing the thermal insulation over time by failure of adhesion of the coating to the substrate.

Rio de Janeiro, a.

Demanding the material manufacturers and construction companies to adequate their systems to the standard requirements, causing a revolution in the way buildings were made until then SILVA et al. For all the cases, the walls executed with the RGB showed same performance or superior to those presented in the literature, without any type of structural damage.

The diagram in Figure 1 shows the steps followed. Also, the standard classifies the performance of the buildings in three different classes, minimum, intermediate desemmpenho superior, among the security, habitability and durability areas. The evaluation of the sound reduction capability is important to ceramic brick masonry walls because they have acoustic fragility related to their voids, who decrease their sound insulation capability by the internal resonances that occur when compared to solid bricks.