Experimental investigation of the seismic resistance of RC beam–column connections after freeze–thaw cycle treatment

Rong, Xian‒Liang; Li, Lei; Huang, Wei‐Yuan; Li, Dong; Zheng, Shansuo; Feng, Weike; Wang, Junyan

doi:10.1016/j.engstruct.2023.116330

Cited by 6 publications

(1 citation statement)

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“…This had led to an increasing concern connected with diminishing natural resources and environmental depletion. Approximately 850 × 10 6 tons of solid waste generated in Europe is due to demolition activities, which is approximately 31% of the total waste generated, out of which only 3% of them are being used as aggregate originating from recycled aggregates (RA) [ 42 , 43 , 44 ]. Hence, disposal of this construction and demolition (C&D) waste is a growing concern among environmentalists.…”

Section: Introductionmentioning

confidence: 99%

Mass GGBFS Concrete Mixed with Recycled Aggregates as Alkali-Active Substances: Workability, Temperature History and Strength

Huo

Huang²,

Han

et al. 2023

Materials

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This study provides the results of an experiment on the possibility of using high-volume ground granulated blast furnace slag (HVGGBFS)-based concrete as mass concrete. In addition to the control concrete, the total weight of the binder was 75% ground granulated blast furnace slag (GGBFS) and 25% ordinary Portland cement (OPC). For the aggregates, both natural and recycled aggregates were used. Three specimens with dimensions of 800 mm × 800 mm × 800 mm were prepared to simulate mass concrete. The workability, temperature aging and strength of the mass concrete were tested. The test results showed that utilizing HVGGBFS concrete as mass concrete can significantly reduce the heat of hydration due to the low heat of hydration of GGBFS, while the heat of hydration of GGBFS and recycled aggregate combination is 11.2% higher than normal concrete, with a slump that is 31.3% lower than that of plain concrete. The results also showed that the use of recycled aggregates in HVGGBFS concrete can significantly reduce workability. However, the compressive strength is higher than when natural aggregates are used due to the alkali activation effect caused by the recycled aggregates. The compressive strength at 7 and 28 days increased by 33.7% and 16.3%, respectively.

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Section: Introductionmentioning

confidence: 99%