Submitted by Jadson Francisco de Jesus SILVA (jadson@uefs.br) on 2018-01-29T23:45:49Z No. of bitstreams: 1 Disserta??o Safira Ferreira de Melo Rios.pdf: 4123737 bytes, checksum: ac40710a6a79f6c8561eb46f6072996b (MD5) / Made available in DSpace on 2018-01-29T23:45:49Z (GMT). No. of bitstreams: 1 Disserta??o Safira Ferreira de Melo Rios.pdf: 4123737 bytes, checksum: ac40710a6a79f6c8561eb46f6072996b (MD5) Previous issue date: 2017-08-21 / The process of extraction and processing of limestone rocks from the Cariri region of Cear? generates an estimated loss of 70% of the total extracted. The volume of waste generated is significant. To mitigate the environmental impacts generated by the inadequate disposition of the sawdust waste from the Cariri stone (RSPC), the aim of this current study is verify the influence of the use of this waste as a partial replacement of the aggregate in the production of mortars. For this, the natural aggregate was replaced by the RSPC at a rate of 10, 20 and 30%. The cement/sand ratio used was 1: 5 by mass, and the consistency index was fixed in 260 ? 5 mm. Were evaluated the properties of the mortars in the fresh state (water retention, incorporated air content, mass density and rheology through squeeze-flow) and in the hardened state (flexural tensile strength, compressive strength, adhesive strength ,drying shrinkage, absorption byimmersion and void index, and absorption by capillary). The replacement of the natural sand by the RSPC provided an improvement both in the properties of the mortar in the fresh state and in the hardened state. With the exception of the shrinkage, which was higher for the mortars with RSPC, and the adhesive strength, which was equivalent to the reference mortar. In this way, it concludes is possible use of the RSPC as a partial replacement of the natural aggregate. / O processo de extra??o e de beneficiamento da rocha calc?ria da regi?o do Cariri cearense (Pedra Cariri), gera uma perda estimada em 70% do total extra?do. Acarretando um significativo volume de res?duos gerados. Com o intuito de mitigar os impactos ambientais gerados pela disposi??o inadequada do res?duo de serragem da pedra Cariri (RSPC), este trabalho tem como objetivo verificar a influ?ncia da utiliza??o do referido res?duo, como substituto parcial do agregado na produ??o de argamassas. Para tanto, foi realizada a substitui??o, em massa, do agregado natural pelo RSPC nos teores de 10, 20 e 30%. O tra?o utilizado foi 1:5, em massa, e o ?ndice de consist?ncia foi fixado em 260 ? 5 mm. Foram determinadas as propriedades das argamassas no estado fresco (reten??o de ?gua, teor de ar incorporado, densidade de massa e reologia por meio do squeeze-flow) e no estado endurecido (resist?ncia ? tra??o na flex?o, resist?ncia ? compress?o, resist?ncia de ader?ncia ? tra??o, retra??o por secagem, absor??o por imers?o e ?ndice de vazios e absor??o por capilaridade). A substitui??o da areia natural pelo RSPC proporcionou melhoria tanto nas propriedades da argamassa no estado fresco, quanto no estado endurecido. Com exce??o da retra??o, que foi maior para as argamassas com RSPC, e da resist?ncia de ader?ncia ? tra??o, que foi equivalente ? argamassa de refer?ncia. Desta forma, conclui-se que ? poss?vel utilizar at? 30% de RSPC em substitui??o ao agregado natural.