Utilization of waste C30 concrete in permeable mortar: mechanical property, permeability mechanism, life cycle assessment

• Autorzy: Wang Chao-qiang , Zeng Ze-yu , Li Heng-feng , Yang Fei-hua

Identyfikatory

DOI

10.1007/s43452-023-00797-2

• Języki publikacji: EN

Abstrakty

EN

Destruction of old buildings generates waste concrete and powder. In addition, the city's drainage system is gradually struggling to keep up with the demands. Therefore, this study takes the recycled aggregate and powder generated from the crushing of waste C30 concrete as the research object, and investigates the impacts of both on the permeable mortar and summarizes the permeability mechanism and hydration mechanism of permeable mortar. Carbon emission reduction calculations and life cycle assessment were performed for both. The study’s findings demonstrated that the extent of volcanic ash reaction increases and then decreases with increasing grinding time. Considering the activity and economy, the regenerated powder with a grinding time of 5 min was selected, and its activity index was 83%. By exploring the performance of the two, the permeable mortar with 10% of recycled micronized powder and 50% of recycled aggregate has good mechanical properties and water permeability, and its permeability coefficient is about 1.57 mm/s, continuous porosity is 21.8%, and the compressive strength is 18.7 Mpa. The permeable mortar has a quality loss rate of 5.01% and a strength loss rate of 25.1% at the 17th freezing and thawing cycle. Recycled aggregates and recycled powders produce far fewer carbon emissions during production and transportation than natural sand and cement. Currently, permeable bricks are mainly used as construction materials for sidewalk pavements. Recycled permeable mortar is more convenient, environmentally friendly, and stronger than permeable bricks, so the research results will provide basic theoretical support for replacing permeable bricks with recycled permeable mortar.

Słowa kluczowe

EN

permeable mortar; recycled aggregate; micronized powder; carbon emission reduction

PL

zaprawa przepuszczalna; kruszywo z recyklingu; proszek mikronizowany; redukcja emisji dwutlenku węgla

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 4
• Strony: art. e267, s. 1--25
• Opis fizyczny: Bibliogr. 38 poz., rys., tab., wykr.

Twórcy

autor

Wang Chao-qiang

• School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing, China

autor

Zeng Ze-yu

• School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing, China

autor

Li Heng-feng

• School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing, China

autor

Yang Fei-hua

• Beijing Building Materials Academy of Scientific Research Co, Ltd, Beijing , China
• State Key Laboratory of Solid Waste Reuse for Building Materials, Beijing, China

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