Cleaner Production Towards a Green Concrete: Multi-scale Experimental Study on Long-term Performance of a Sustainable Modified-SWSSC

Mohamad Jahani, Shore Shahnoori (Corresponding author), Saeed Moradi, Cyrus Ershadi

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Samenvatting

The natural resources on earth are finite; thus, in a sustainable and circular system, the byproducts of one industry are sources for others. According to SDGs, nations should seek integrated methods to control climate change, minimise natural resources’ usage, neutralise the CO2 emissions and GHE, etc. Thus, as primary sources of emissions and natural resources’ depletion in the building industry, construction materials need crucial considerations. Therefore, the current study strives for methods to implement the wastes efficiently while preventing the use of freshwater in materials and production. However, the durability of the resulting concrete for usage in the structures exposed to marine and hostile circumstances is critical. The purpose of this research is to investigate some major characteristics of pozzolanic concrete made of seawater (Sw) and sea sand (DMS) in the laboratory and tidal conditions on a multi-scale level based on scientific results and environmental concerns. Therefore, the samples were prepared with two w/c ratios (0.35, 0.4) by replacing a certain percentage of different pozzolans with Portland cement (OPC) and fine aggregates with DMS, then were cured for 7 and 28 days, thereupon kept on a tidal condition for 180 days. The destructive and non-destructive tests showed that pozzolans’ usage, specifically silica fume (SF), highly improves the sustainability parameters of seawater sea-sand concrete (SWSSC) in tidal conditions and makes it more resistant to corrosive circumstances. SEM analysis showed objective evidence to justify changes in crystal texture of the OPC paste, various consolidations, void depths due to the presence of Sw, durability and microstructure improvements of SWSSC affected by eco-friendly materials. In the end, the data were analysed, and a correlation between SWSSC test results and behavioural characteristics was provided.
Originele taal-2Engels
Artikelnummer6181088
Pagina's (van-tot)43-59
TijdschriftAmerican Journal of Construction and Building Materials
Volume6
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 23 mei 2022

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