Abstract
Background/Objectives: Concrete is an inevitable material in construction industry. The major pollution from construction industry was reported from the production of materials like aggregates and cement. The material scarcity, supply-demand gap and environmental pollution insist the construction industry to find an alternative material for concrete matrix. The prime objective of this study is to review the past and recent research on the utilization of alternative materials in concrete production and its applications in construction industry. Materials and Methods: The abundant availability of recyclable waste materials like Construction and Demolition Wastes (C and DW) and industrial byproducts such as fly ash and slag increased the interest of the researchers towards application of these materials as an alternative source for cement and aggregate materials. Findings: Recycled Aggregate Concrete (RAC) showed less strength performance than normal concrete. To attain the similar strength performance of normal concrete, some modifications in the RAC mix design is required. The durability performance was highly improved with the application of industrial by product materials in concrete. Application/Improvement: This study possibly will help to encourage the consumers and further promote the use of alternative materials for concrete production on a larger scale in civil engineering projects. Keywords: Concrete, Construction and Demolition Wastes, Fly Ash, Recycled Aggregate Concrete, Slag
Highlights
Recent research reports said that about 8% of the global annual CO2 emissions are due to concrete production
Existing research reports about strength performances were reviewed and possible percentage application of alternative materials was highlighted based on the reports
The above review of research reports mainly focused on application of alternative materials in concrete industry
Summary
Recent research reports said that about 8% of the global annual CO2 emissions are due to concrete production. To meet-out the demands and to save the environment, construction industry started using alternative materials in concrete. Recycling C & DW and use as an alternative for aggregates in concrete is a sustainable solution for waste disposal and depletion of natural resources. Using industrial by products as an alternative material for cement greatly reduce the environmental problem caused by these waste disposal. In this paper applications of alternative materials like C & DW, fly ash and Ground Granulated Blast Furnace Slag (GGBFS)in concrete were critically reviewed. Existing research reports about strength performances were reviewed and possible percentage application of alternative materials was highlighted based on the reports
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