Utilisation of pozzolanic material in skim-coat product for reduction of carbon footprint

Abstract

Abstract Skim coat wall putty is the most broadly used and important product in the coating and construction industry which is a combination of white cement, inorganic minerals fillers and organic additives like Re-dispersible Polymer (RDP), Methyl Cellulose (MC) etc. This novel study investigates a sustainable way to use Supplementary Cementitious Materials (SCM) in skim-coat wall putty products. Industrial waste in cement and cement-based products reduces CO2 emissions. Ground Granulated Blast Furnace (GGBS), a steel industry waste, is highly reactive and forms all desired cementitious phases after hydration. This study discusses the benefits of using GGBS in skim-coat wall putty products and comparable major properties like pot life, workability, tensile adhesion strength, compressive strength, water capillary absorption test, finishing, surface smoothness, etc. This technical paper focuses on the feasibility of addition of GGBS as a partial replacement of cement. Four sets of wall putty including a control sample with 2%, 4% and 6% GGBS addition were prepared. This study has revealed that the Set-3 containing 4% GGBS has shown all desired skim-coat physical-mechanical properties. In 1 ton wall putty production, there can be saving of approx. 23kg CO2 which takes this study on the roadmap of sustainability and environment conservation. GGBS is complete industrial waste which is being utilized in the product hence the issue of disposing of waste is eliminated.