Use of Leather Residue in the Manufacturing of Soil-Cement Bricks

Abstract:

This work is an analysis of incorporation of leather powder residue to soil in order to apply it in soil-cement bricks. The leather powder is a byproduct of the finishing step of leather manufacturing that contains chromium in its composition. This element, when in its hexavalent form, is carcinogenic. Experiments were performed regarding brick pressing, water absorption, simple pressing, leaching and solubilization so that the mixtures have the minimum requisites for using the brick. The doses were 0%, 10%, 15%, 20%, and 30% in volume of leather powder in soil. Only the 10% dose met the requisites of ABNT: NBR 8491:1984 that prescribes a minimum resistance of 2 MPa and absorption content lower than 20%. For this dosage, according to the limits stated in ABNT regulation NBR 10004:2004 , the leaching extract was classified as a Class II non-inert, which makes it possible to use it for civil construction purposes.

• Periodical: Materials Science Forum (Volume 820)
• Pages: 576-582
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.820.576
• Online since: June 2015
• Authors: Carol Ferreira Rezende Santos, Rita de Cássia Silva Sant’ana Alvarenga, Benício Costa Ribeiro, Charles Luis da Silva, Ana Augusta Passos Rezende, Délio Porto Fassoni
• Keywords: Leather Waste, Reuse in construction, Soil-Cement Brick

References

[1] E.S. Fujikawa: Incorporation of chromium powder, residues in civil construction materials. Master (Dissertation). Bauru, 2002. Universidade Estadual Paulista (UNESP). (SP) (In Portuguese).

DOI: 10.5212/terraplural.v.15.2118016.034

[2] S.Y. Yuan: Study of the influence of adding chemically treated leather powder in the Portland cement mortar characteristics. Master (Dissertation). São Carlos, 2009. Universidade Federal de São Carlos (UFSCar). SP. (In Portuguese).

DOI: 10.21115/jbes.v14.suppl2.p180-6

[3] A.L.R.S. Tachard: Evaluation of mechanical resistance of Portland cement mortar with leather powder treated in acidic media. Master (Dissertation). Florianópolis, 2006. Federal University of Santa Catarina (UFSC). (SC) (In Portuguese).

[4] C.A. Pinto: Stabilization through cement solidification of leather tanning residue containing chromium. Master (Dissertation). São Paulo, 2001. Universidade de São Paulo (USP). (SP). (In Portuguese).

DOI: 10.29381/0103-8559/20213103334-44

[5] M.P. Santos: Soil-cement manufacture with addition of wooden residues from civil construction. Master (Dissertation). São Carlos, 2006. Universidade Federal de São Carlos (UFSCar). SP. (In Portuguese).

DOI: 10.21115/jbes.v14.suppl2.p180-6

[6] J.G.M. PERES: Feasibility of using leather powder for obtaining alternative construction material. Master (Dissertation). Campinas, 2004. Universidade Estadual de Campinas (UNICAMP). (SP) (In Portuguese).

DOI: 10.29381/0103-8559/20203004521-5

[7] Brazilian Association of Technical Regulation. Soil-cement compact brick using manual pressing. Rio de Janeiro: ABNT 1989. (NBR 10832) (In Portuguese).

[8] Brazilian Association of Technical Regulation. –Tijolo maciço de solo-cimento – Determination of compressive strengh and water absorption. Rio de Janeiro: ABNT 1984. (NBR 8491). (In Portuguese).

[9] Brazilian Association of Technical Regulation. Procedures for obtainment of leaching extract from solid residues. Rio de Janeiro: ABNT 2004. (NBR 10005). (In Portuguese).

[10] Brazilian Association of Technical Regulation. Soil – Granulometric analysis. Rio de Janeiro: ABNT 1984. (NBR 7181). (In Portuguese).

[11] Brazilian Association of Technical Regulation. Soil – Determination of plasticity limits. Rio de Janeiro: ABNT 1984. (NBR 7180). (In Portuguese).

[12] Brazilian Association of Technical Regulation. Soil – Determination of liquidity limits. Rio de Janeiro: ABNT 1984. (NBR 6459). (In Portuguese).

[13] Brazilian Association of Technical Regulation. Soil - #4, 8mm sieve passing- Determination of specific mass. Rio de Janeiro: ABNT1984. (NBR 6508). (In Portuguese).

[14] Brazilian Association of Technical Regulation. Compactation testing. Rio de Janeiro: ABNT1986). (NBR 7182). (In Portuguese).

[15] Brazilian Association of Technical Regulation. Procedures for obtainment of solubilization extract from solid residues. Rio de Janeiro: ABNT 2004. (NBR 10006). (In Portuguese).

[16] Brazilian Association of Technical Regulation. Solids - Classification. Rio de Janeiro: ABNT 2004. (NBR 10004). (In Portuguese).