Application of granulated lead–zinc slag in concrete as an opportunity to save natural resources

Alwaeli, Mohamed

doi:10.1016/j.radphyschem.2012.09.024

Cited by 76 publications

(22 citation statements)

References 31 publications

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“…Theoretical bond strengths using the formula as per BS 8110. fbu = β(fcu) 0. 5 For uniform bond, the bond stress was computed using formula τ = P / (…”

Section: Bond Strengthmentioning

confidence: 99%

Experimental Behaviour of Seawater Concrete with Copper Slag

2019

IJITEE

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Marine concrete structures are subjected to very severe exposure conditions and their durability is directly related to the quality of concrete used in the construction due to the salinity present in water .The present study intends to evaluate the strength and bonding property of copper slag in sea water concrete (SWC) and tap water concrete (TPC). In total the mixes were cast with 25% using copper slag as a substitution for fine aggregate at constant w/c 0.4 for M40 mix grade. The various tests conducted on different concrete mixes included fresh properties, compressive strength, split tensile strength, young’s modulus, flexural and bond strength. Results showed that fresh properties enhanced with increment in copper slag substitution. The experimental trails were carried out for higher strength and durability. The projected mix design method was found to be agreeable for producing concrete with fine aggregates having different properties. The pH of sea water used fluctuates between 6.4 to 8.10. The specimens were casted for various sea water having different pH the strength was compared with the control specimen.

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“…Theoretical bond strengths using the formula as per BS 8110. fbu = β(fcu) 0. 5 For uniform bond, the bond stress was computed using formula τ = P / (…”

Section: Bond Strengthmentioning

confidence: 99%

Experimental Behaviour of Seawater Concrete with Copper Slag

2019

IJITEE

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“…A areia é largamente utilizada no setor da construção civil, sendo retirada do solo pela mineração, o que causa impactos ambientais. A melhor maneira de diminuir a utilização desses recursos e conservar o meio ambiente é o emprego de materiais reciclados ou alternativos (ALWAELI, 2013). Sendo assim, a reciclagem e a recuperação dos recursos são de grande importância e podem ser incluídas como práticas comuns, uma alternativa que visa à sustentabilidade, pois é a melhor maneira de solucionar os problemas dos resíduos e de eliminá-los, especialmente melhorando as técnicas de reutilização, fundamental para a preservação dos recursos naturais (DUTTA; DAS, 2010).…”

Section: Introductionunclassified

Influência do resíduo de PVC como agregado no concreto para peças de pavimentos intertravados

Santos

Ferrari²

2019

Ambient. constr.

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Resumo ste trabalho apresenta uma análise da influência do resíduo de PVC como substituto parcial do agregado miúdo em propriedades físicas como absorção de água, índice de vazios, massa específica e de resistência à compressão do concreto dosado para peças de pavimentos intertravados. Foram analisados quatro traços de concreto, sendo um de referência, apenas com agregados naturais, e outros três com substituição de 5%, 10% e 15% de resíduo de PVC. Verificou-se que, estatisticamente, o resíduo de PVC influenciou na redução da resistência à compressão e da massa específica das peças. Em relação à absorção de água e ao índice de vazios, o resíduo de PVC não influenciou nos resultados desses ensaios. Quanto ao ensaio de durabilidade por secagem e molhagem, pode-se observar aumento da perda de massa com o aumento da porcentagem de PVC no traço. A análise microscópica dos traços possibilitou observar a forma dos grãos dos resíduos de PVC e sua interação com os demais materiais constituintes do concreto na interpretação dos resultados dos ensaios. A análise dos resultados mostrou que o resíduo de PVC pode ser incorporado ao concreto de peças para pavimentos sem que estas sofram significativas alterações em suas propriedades.Palavras-chave: Resíduo de PVC. Peças de concreto. Pavimento. AbstractThis study presents an analysis of the influence of PVC waste as a partial substitute of fine natural aggregate on physical properties such as water absorption, voids index, specific mass and the compressive strength of interlocking block pavements. Four concrete mixtures were analysed: a reference mixture with 0% replacement, and mixtures with 5%, 10% and 15% of fine aggregate made of PVC waste. The study showed that, statistically, the PVC waste influenced the decrease of the compressive strength and the specific mass of the blocks. The PVC waste proved to have no influence on the test results for water absorption and the voids index. The durability test for drying and wetting showed that there was an increase in the loss of mass with the increase of the percentage of PVC in the concrete mixture. The microscopic analysis of the concrete mixtures allowed observation of the shape of the grains of the PVC residues and their interaction with the other constituent materials of the concrete, aiding in the interpretation of the test results. Hence, the results showed that PVC waste may be incorporated into concrete blocks without causing significant alterations in their properties.

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“…This requires addition of other materials to conventional concrete to meet the required strength, durability and ecological aspects and this led to the need for search of additional materials. Various authors had carried out successful studies on use of different materials namely fly ash [4,5], rice husk ash [6], lead-zinc slag [7], waste glass powder [9], ceramic waste powder [10], silica fumes [11], polypropylene fibres [11], volcanic originated natural materials [12] etc., in concrete to improve strength and durability aspects as per required by the mega-infrastructure projects. Of these different materials, Red Brick dust is one such material which has potential for use in concrete making.…”

Section: Introductionmentioning

confidence: 99%

Red Brick Dust as a Partial Substitute to Cement in Conventional Concrete

Raju¹,

Reddy²,

Raju³

et al. 2019

IJRTE

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In emerging countries like India, the government plans for mega-infrastructure projects for the development of the country. These projects involve construction of high-rise buildings and high-speed rail and road networks. These constructions require higher quantities of concrete, which is a combination of cement, fine and coarse aggregate. The manufacturing process of cement results in emission of CO2 , a pollutant which causes serious health hazards to living beings. The adverse effects are not only limited to posing threat to living beings, but also result in depletion of natural resources which are used as key ingredients in manufacturing cement. This mandates the need to search for cement replacing materials which maintain the same strength or improve the strength of conventional concrete. Red brick Dust is a highly siliceous waste material which is available near brick kilns or while dismantling buildings. Improper handling of red brick dust causes silicosis disease in human beings, when inhaled. Hence there is a need to dispose it off safely. It is reported by various researchers that red brick dust when used as an additive in concrete, improved the strength and durability aspects. Hence, in the present study, it is aimed to improve the compressive strength of conventional concrete by substituting cement partially with red brick dust in conventional concrete. The study has revealed that upon substituting cement with red brick dust, the compressive strength of conventional concrete is increased by about 13%. The present study reveals that red brick dust can be effectively used as a partial substitute to cement in conventional concrete thereby addressing the adverse effects of cement manufacturing and health hazards of improper disposal of red brick dust

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Application of granulated lead–zinc slag in concrete as an opportunity to save natural resources

Cited by 76 publications

References 31 publications

Experimental Behaviour of Seawater Concrete with Copper Slag

Experimental Behaviour of Seawater Concrete with Copper Slag

Influência do resíduo de PVC como agregado no concreto para peças de pavimentos intertravados

Red Brick Dust as a Partial Substitute to Cement in Conventional Concrete

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