TY - JOUR
T1 - Cleaner Production Towards a Green Concrete
T2 - Multi-scale Experimental Study on Long-term Performance of a Sustainable Modified-SWSSC
AU - Jahani, Mohamad
AU - Shahnoori, Shore
AU - Moradi, Saeed
AU - Ershadi, Cyrus
PY - 2022/5/23
Y1 - 2022/5/23
N2 - 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.
AB - 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.
KW - Tidal Conditions, SWSSC’s Durability, Waste Materials Applications, Carbonation Depth, Water Penetration
U2 - 10.11648/j.ajcbm.20220601.14
DO - 10.11648/j.ajcbm.20220601.14
M3 - Article
SN - 2640-0022
VL - 6
SP - 43
EP - 59
JO - American Journal of Construction and Building Materials
JF - American Journal of Construction and Building Materials
IS - 1
M1 - 6181088
ER -