Research on crushing and recycling of waste concrete

Ai, Wenbo; Li, Hongmei; Zhang, Jian; Lv, Shuaishuai; Xu, Q.; Li, Huanhuan

doi:10.1088/1755-1315/446/3/032069

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…Currently, one method of recycling waste concrete is to crush, clean, and grade waste concrete to obtain recycled aggregate particles. The particles with a size less than 4.75 mm after crushing are called recycled fine aggregate, an artificial aggregate with a complex composition and high permeability generally used to prepare recycled mortar [20]. The various properties of waste concrete aggregates have also been explored [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

et al. 2022

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In this study, waste concrete fine aggregates and cement are applied to sludge solidification and resource recycling. The unconfined compressive strength (UCS) test is performed to investigate the variation in the strength and stress–strain properties of the solidified sludge with the content and particle size of waste concrete fine aggregate, cement content, and curing time. The results show that incorporating waste concrete fine aggregates can improve the UCS of cement-solidified sludge, which can achieve the optimum effect when the fine aggregate content ranges from 12% to 15%. However, compared with the fine aggregate content, the cement content and curing time are the main factors in improving the strength of waste concrete fine aggregate and cement-solidified sludge (WCSS). The stress–strain curves of WCSS comprise four stages. The failure strain εf of WCSS with four fine aggregate contents decreases in a power function with the increase in qu, and εf is mostly distributed when the content is 1.1–2.1%. A linear relationship is observed between E50 and qu. This study attempts to promote the recycling of waste concrete fine aggregates and obtain solidified sludge with excellent mechanical properties, providing some reference for practical engineering applications.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

et al. 2022

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The effects of various operational- and materials-oriented parameters on the carbonation performance of low-quality recycled concrete aggregate

Dundar

Tuğluca

İlcan

et al. 2023

Journal of Building Engineering

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Experimental Study on Short Steel Tube Columns Filled with Recycled Large Aggregate-Self Compacting Concrete Subjected to Compression

Wang

Guan

Qiu³

et al. 2021

sci adv mater

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The mechanical characteristics of recycled large aggregate concrete show poorer performance than that of Portland-cement concrete due to the internal defects of recycled large aggregate (RLA). To improve the mechanical characteristics of recycled large particle size aggregate concrete, the recycled large aggregate Self-Compacting Concrete filled steel tube (RLA-SCCFST) is proposed. The external steel tube can not only keep the core recycled large aggregate concrete in the three-dimensional state of stress, but also prevent the crack expansion of the core recycled large aggregate concrete. RLA-SCCFST subjected to compression is studied experimentally. The compression failure tests use 20 specimens of circular section short column with different steel content rate, particle size of RLA, strength of RLA, strength of SCC, and eccentricity of the load. The influence of different factors on mechanical characteristics of RLA-SCCFST short cylindrical components subjected to compression is analyzed. The results indicate that the load-bearing performance of RLA-SCCFST short columns increases following with the augmentation of RLA particle size, strength of RLA particle size, strength of SCC and steel content rate. The load-bearing performance of RLA-SCCFST short columns reduced with the augmentation of the load eccentricity. And the experimental results are in high coincidence with those calculated by different formulas.

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Research on crushing and recycling of waste concrete

Cited by 5 publications

References 9 publications

Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

Experimental Study on the Strength and Stress–Strain Properties of Waste Concrete Fine Aggregate and Cement-Solidified Sludge

The effects of various operational- and materials-oriented parameters on the carbonation performance of low-quality recycled concrete aggregate

Experimental Study on Short Steel Tube Columns Filled with Recycled Large Aggregate-Self Compacting Concrete Subjected to Compression

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