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A platform for research: civil engineering, architecture and urbanism
Sustainable alkali activated concrete with fly ash and waste marble aggregates: Strength and Durability studies
https://orcid.org/0000-0003-4901-7113
Highlights Waste Marble Aggregates can be utilized in sustainable Alkali Activated Concrete. Up to 50% of natural aggregates can be replaced with Waste Marble Aggregates. Alkali Activated Concrete with Waste Marble Aggregates showed excellent strength. Durability characteristics of alkali activated concrete using waste marble was studied using different methods.
Abstract This study examines the use of waste marble aggregates (WMA) as a substitute to natural aggregates (NA) to produce sustainable alkali activated concrete (AAC). Sodium hydroxide (NaOH) of 8M concentration and sodium silicate (Na2SiO3) were used as an alkaline activator for high calcium fly ash based AAC. NA were replaced with WMA at different weight ratios, namely 0%, 25%, 50%, 75% and 100%. Different properties like density, workability, air content, compressive, flexural and tensile strengths, along with modulus of elasticity of fresh and hardened concrete were investigated. Also, rapid chloride penetration test, oxygen permeability index test, depth of water penetration, electrical resistivity and acid resistance were also conducted to study the durability characteristics of the sustainable AAC. Results of this study showed that WMA affected the pore structure and new calcium-based products were formed along with polymeric products. New products in the matrix accelerate the polymerisation process and significantly enhanced the strength properties and durability of AAC. The outcomes of this study revealed that WMA can be employed to replace up to 50% of NA in the production of sustainable AAC. Its high potential to replace NA could lead to significant saving in energy, cost and, can further reduce the hazardous environmental impacts caused by marble industries during mining, processing and polishing phases.
Sustainable alkali activated concrete with fly ash and waste marble aggregates: Strength and Durability studies
https://orcid.org/0000-0003-4901-7113
Highlights Waste Marble Aggregates can be utilized in sustainable Alkali Activated Concrete. Up to 50% of natural aggregates can be replaced with Waste Marble Aggregates. Alkali Activated Concrete with Waste Marble Aggregates showed excellent strength. Durability characteristics of alkali activated concrete using waste marble was studied using different methods.
Abstract This study examines the use of waste marble aggregates (WMA) as a substitute to natural aggregates (NA) to produce sustainable alkali activated concrete (AAC). Sodium hydroxide (NaOH) of 8M concentration and sodium silicate (Na2SiO3) were used as an alkaline activator for high calcium fly ash based AAC. NA were replaced with WMA at different weight ratios, namely 0%, 25%, 50%, 75% and 100%. Different properties like density, workability, air content, compressive, flexural and tensile strengths, along with modulus of elasticity of fresh and hardened concrete were investigated. Also, rapid chloride penetration test, oxygen permeability index test, depth of water penetration, electrical resistivity and acid resistance were also conducted to study the durability characteristics of the sustainable AAC. Results of this study showed that WMA affected the pore structure and new calcium-based products were formed along with polymeric products. New products in the matrix accelerate the polymerisation process and significantly enhanced the strength properties and durability of AAC. The outcomes of this study revealed that WMA can be employed to replace up to 50% of NA in the production of sustainable AAC. Its high potential to replace NA could lead to significant saving in energy, cost and, can further reduce the hazardous environmental impacts caused by marble industries during mining, processing and polishing phases.
Sustainable alkali activated concrete with fly ash and waste marble aggregates: Strength and Durability studies
https://orcid.org/0000-0003-4901-7113
Highlights Waste Marble Aggregates can be utilized in sustainable Alkali Activated Concrete. Up to 50% of natural aggregates can be replaced with Waste Marble Aggregates. Alkali Activated Concrete with Waste Marble Aggregates showed excellent strength. Durability characteristics of alkali activated concrete using waste marble was studied using different methods.
Abstract This study examines the use of waste marble aggregates (WMA) as a substitute to natural aggregates (NA) to produce sustainable alkali activated concrete (AAC). Sodium hydroxide (NaOH) of 8M concentration and sodium silicate (Na2SiO3) were used as an alkaline activator for high calcium fly ash based AAC. NA were replaced with WMA at different weight ratios, namely 0%, 25%, 50%, 75% and 100%. Different properties like density, workability, air content, compressive, flexural and tensile strengths, along with modulus of elasticity of fresh and hardened concrete were investigated. Also, rapid chloride penetration test, oxygen permeability index test, depth of water penetration, electrical resistivity and acid resistance were also conducted to study the durability characteristics of the sustainable AAC. Results of this study showed that WMA affected the pore structure and new calcium-based products were formed along with polymeric products. New products in the matrix accelerate the polymerisation process and significantly enhanced the strength properties and durability of AAC. The outcomes of this study revealed that WMA can be employed to replace up to 50% of NA in the production of sustainable AAC. Its high potential to replace NA could lead to significant saving in energy, cost and, can further reduce the hazardous environmental impacts caused by marble industries during mining, processing and polishing phases.
Sustainable alkali activated concrete with fly ash and waste marble aggregates: Strength and Durability studies
Saloni (author) / Parveen (author) / Lim, Yee Yan (author) / Pham, Thong M. (author) / Jatin (author) / Kumar, Jatin (author)
2021-02-20
Article (Journal)
Electronic Resource
English
AAC , Alkali-activated concrete , AlO , Aluminium monoxide , CASH , Calcium aluminate silicate hydrate , CSH , Calcium silicate hydrate , GPC , Geopolymer concrete , H<inf>2</inf>SO<inf>4</inf> , Sulphuric acid , NA , Natural aggregates , NaOH , Sodium hydroxide , Na<inf>2</inf>SiO<inf>3</inf> , Sodium silicate , NASH , Sodium aluminate silicate hydrate , NFA , Natural fine aggregates , NCA , Natural coarse aggregates , WMA , Waste marble aggregates , WMFA , Waste marble fine aggregates , WMCA , Waste marble coarse aggregates , SEM , Scanning electron microscopy , SiO , Silicon monoxide , XRD , X-ray diffraction , Fly ash , Durability , Strength , Geopolymer , Marble
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