Copper Slag Mortar Properties

Abstract

Copper slag is a copper industry waste that is essentially used as an abrasive for metals to remove coatings or paintings, due to its hardness, sieve distribution and rough surface, mainly in the naval industry. After the wearing process, copper slag retains most of its original properties, and remaining an environmental problem. Chemical composition of copper slag presents a high Fe, Si and Al oxide content what makes it a pozzolanic material. Thus, it is possible to use it as a partial replacement for sand and after triturating it into very small particles as a replacement for cement. After a chemical, physical, mineralogical, and environmental characterization of copper slag, its use as a partial replacement of sand on mortars was investigated. The experimental program was developed to evaluate the effect of several percentages of sand substitution in mortars. For mortars 25, 50 and 75 % of sand replacement by volume was studied. A standard 1/3 cement/sand ratio, by weight, with cement type CEM 42.5 I, was used. The type of sand and the effect of washing the slag were also investigated. Strength was measured at 7, 28, 60 and 90 days. Results obtained until now indicate that a reduction of strength occurs when the slag content increases. Additionally, it was observed a delay of the hardening process by the addition of the copper slag. As a conclusion, the use of copper slag as a sand replacement seemed to be a practical option.

Use of copper slag and washed copper slag as sand in concrete: a state-of-the-art review

“…AlJabri et al, 2006AlJabri et al, , 2009aAlJabri et al, , 2009bAlJabri et al, , 2011Alnuaimi, 2009;Bahadur and Nayak, 2012;Nagan, 2010, 2011;Brindha and Sureshkumar, 2010;Cachim et al, 2009;Ghosh, 2007;Holcim (Singapore), 2007;Hwang and Laiw, 1989;Ishimaru et al, 2005;Koh and Lye, 2012;Lee et al, 2003;Ling and Thim, 1999;Madany et al, 1991;Meenakashi and Ilangovan, 2011;Nazer et al, 2013;Resende et al, 2008;Shoya et al, 1997Shoya et al, , 1999Shoya et al, , 2003Song et al, 2003;Sudarvizhi and Ilangovan, 2012;Wu et al, 2010a) is that, even though the researchers did not generally comply with the important requirement of maintaining the particle grading when CS/WCS was used as a component of sand, Table 4. A series of trial mixes, using SIBA, RCA and CS/WCS materials the material can be used effectively for making concrete, provided that good concrete design practice is adopted.…”

Effect of type cement on the mechanical strength of copper slag mortars

“…However, experiences on the usage of these residuals in many sectors of production have been carried out, with very good published results, particularly on the usage of copper slag in the construction industry. This residual has been used as raw material in cement production, as a substitute for arid, both in concrete and cement mortars (Zain et al (2004), Goñi et al (1994), Resende et al (2008), Al-Jabri et al (2006), Shi et al (2008), Wu et al(2010a), Wu et al(2010b), Moura et al (1999)). Mortar is a material regularly used as both decorative coating or as a means of waterproofing of surfaces, and as a merger of prefabricated cement elements and clay bricks in building work.…”

“…Initially, it is fluid, which after a period of cement and water reactivity, acquires resistance until its final hardening. On the other hand, copper slag have also been used as raw material for the polishing and cleaning by abrasive blast of metallic structures (Kambham et al, 2007), (Resende et al 2008) and as gravel in road work (Douglas & Mainwaring, 1985), among other commercial applications.…”

“…Tang et al (2000) in (Shi et al 2008), reported that copper slag usage as sandstone aggregates in cement mortars increases its resistance to abrasion. On the other hand, Resende et al (2008) assessed feasibility of mortar manufacturing incorporating recycled copper slag in the blasting of metallic structures as a partial substitute of sand. Shi et al (2008) studied the characteristics and effects of copper slag in the properties of cement, mortars and concrete.…”

Use of copper slag as a replacement for fine aggregate in reinforced concrete slender columns

“…Resende et al [6] reported a small reduction in concrete compressive and flexural strengths due to substitution of natural sand by copper slag. Workability was also reduced, although it stayed within reasonable limits.…”