Impact noise isolation of prefabricated ribbed slab with prestressed joist and ceramic block

Haas, Alessandra; Lourenço, Willian Magalhães de; Santos, Joaquim Cesar Pizzutti dos; Santos, Jorge Luiz Pizzutti dos

doi:10.1590/s1678-86212022000100581

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ARTIGOS • Ambient. constr. 22 (1) • Jan-Mar 2022 • https://doi.org/10.1590/s1678-86212022000100581 copy

Impact noise isolation of prefabricated ribbed slab with prestressed joist and ceramic block

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Impact noise is one of the main discomfort factors among users of multi-storey buildings. Thus, this research seeks to: determine the acoustic properties of insulation against impact noise in the prefabricated ribbed slab system, composed of prestressed joists and ceramic blocks in three montage compositions, evaluate the performance of insulation against impact noise of the technique on floating floor over the slab, using fifteen different resilient materials, and compare the results obtained for the various compositions with the Brazilian criteria of performance standard 15575-3:2013. The tests were carried out in the UFSM laboratory, in accordance with ISO 140-7 parameters updated to ISO 16283-2:2020, and ISO 717-2:2020, to determine the weighted standard impact sound pressure level ( L' nT,w ) of each composition tested. It can be concluded that the constructive typology, with a 4 cm subfloor and ceramic coating, needs acoustic treatment to fit the Brazilian regulations, and that the use of the floating floor technique is a good solution, since the great majority compositions with resilient materials reach an intermediate level of the standard between 56 and 65 dB.

Keywords:
Acoustic confort; Acoustic isolation; Impact noise

Elemento	L’_nT,w dB	Nível de desempenho
Sistema de pisos separando unidades habitacionais autônomas posicionadas em pavimentos distintos	66 a 80	M
	56 a 65	I
	≤ 55	S
Sistema de piso de áreas de uso coletivo (atividades de lazer e esportivas, como home theater, salas de ginástica, salão de festas, salão de jogos, banheiros e vestuários coletivos, cozinhas e lavanderias coletivas) sobre unidades habitacionais autônomas	51 a 55	M
	46 a 50	I
	≤ 45	S

Material	Amostra	Densidade	Espessura
Lã de vidro	4	60 kg/m³	15 mm
Lã de poliéster (PET)	5	30 kg/m³	8 mm
	6	36 kg/m³	8 mm
	7	80 kg/m³	5 mm
	8	60 kg/m³	4 mm
	9	60 kg/m³	5 mm
	10	60 kg/m³	10 mm
Polipropileno expandido (EPP)	11	42 kg/m³	2 mm
Polietileno expandido (EPE)	12	20 kg/m³	5 mm
	13	25 kg/m³	5 mm
	14	25 kg/m³	10 mm
	15	65 kg/m³	10 mm
Borracha reciclada	16	700kg/³	5 mm
	17	600 kg/m³	5 mm
	18	750 kg/m³	8/4 mm

Associação Nacional de Tecnologia do Ambiente Construído - ANTAC Av. Osvaldo Aranha, 93, 3º andar, 90035-190 Porto Alegre/RS Brasil, Tel.: (55 51) 3308-4084, Fax: (55 51) 3308-4054 - Porto Alegre - RS - Brazil
E-mail: ambienteconstruido@ufrgs.br

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[1] Alessandra Haas Programa de Pós-Graduação em Engenharia Civil | Universidade Federal de Santa Maria | Av. Roraima, 1000, Prédio INPE, Sala 2061, Camobi | Santa Maria - RS - Brasil | CEP 97105-900 | Tel.: (55) 3220-8837 | E-mail: alessandra.compose@gmail.com

ƒ (Hz)	100	125	160	200	250	315	400	500	630	800	1k	1,25k	1,6k	2k	2,5k	3,15k
L'nT 1	63	64	67	64	70	70	74	74	77	78	79	79	81	83	83	88
L'nT 2	63	65	66	64	70	72	74	76	72	75	73	75	78	77	80	81
L'nT 3	60	59	65	66	67	67	69	73	71	73	75	75	77	78	79	81
L'nT 4	53	47	44	54	43	43	41	53	45	49	50	50	49	49	49	48
L'nT 5	53	50	54	60	51	48	45	59	49	52	54	52	51	49	49	49
L'nT 6	54	47	55	61	50	48	46	57	50	52	54	52	52	51	49	48
L'nT 7	54	50	54	61	52	49	46	57	48	51	53	51	50	50	49	49
L'nT 8	49	44	54	60	50	46	45	56	48	52	54	51	50	49	50	49
L'nT 9	47	44	53	59	48	45	45	55	46	52	53	51	50	51	50	48
L'nT 10	51	46	48	59	45	43	43	53	44	50	50	49	49	47	46	46
L'nT 11	57	58	58	64	62	56	53	63	55	56	56	55	55	55	54	53
L'nT 12	58	60	57	63	61	56	52	63	54	55	58	55	55	54	55	52
L'nT 13	58	61	59	63	61	56	53	64	55	55	58	55	55	55	55	52
L'nT 14	60	60	55	62	59	53	50	62	53	53	56	54	54	55	54	54
L'nT 15	59	60	57	63	61	55	53	63	55	55	57	56	57	59	62	64
L'nT 16	58	60	63	63	62	58	56	63	59	60	62	58	58	60	59	60
L'nT 17	54	56	59	63	62	56	54	62	55	57	59	58	58	58	57	58
L'nT 18	52	55	54	63	57	54	52	59	52	53	54	54	53	54	52	52