Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
LC50 fly ash microbead lightweight high-strength concrete: mix ratio design, stress mechanism, and life cycle assessment
https://orcid.org/http://orcid.org/0000-0001-6138-4288
This study compared and evaluated the working performance and mechanical properties of LC50 fly ash microbead lightweight high-strength concrete (FLHSC) using fly ash microbeads, cement, water-reducing agent dosage, water–cement ratio, and types of additives as variables. Through reasonable design of expansion tests, bulk density tests, and mechanical strength tests, the basic optimal combination was obtained. The research results indicate that the optimal mix ratio of FLHSC is: fly ash floating beads 230 kg/m3, ceramsite 200 kg/m3, cement 1200 kg/m3, water 360 kg/m3, water-reducing agent 20.4 kg/m3. The water–binder ratio is selected as 0.3, type II water-reducing agent is selected, and the dosage is 1.7% of the cementitious material. Its slumps is 680 mm, and its dry bulk density is 1562.0 kg/m3, the 28-day strength is 52.4 MPa. On this basis, the microstructure and hydration products of FLHSC under different conditions were analyzed in depth using scanning electron microscopy and infrared spectroscopy, and the interface enhancement mechanism and failure mode were studied in depth. It is found that the failure of FLHSC is close to the vertical failure mode, and the crack always passes through the lightweight aggregate. In addition, a life cycle assessment and CO2 emission calculation from production to application were conducted on FLHSC. In addition, a life cycle assessment and CO2 emission calculation were conducted on FLHSC from production to application, and the results showed that FLHSC has better environmental benefits than ordinary C50 concrete, with a CO2 emission of 632.443 (kgCO2/t). Finally, the application of LWHSC was analyzed.
LC50 fly ash microbead lightweight high-strength concrete: mix ratio design, stress mechanism, and life cycle assessment
https://orcid.org/http://orcid.org/0000-0001-6138-4288
This study compared and evaluated the working performance and mechanical properties of LC50 fly ash microbead lightweight high-strength concrete (FLHSC) using fly ash microbeads, cement, water-reducing agent dosage, water–cement ratio, and types of additives as variables. Through reasonable design of expansion tests, bulk density tests, and mechanical strength tests, the basic optimal combination was obtained. The research results indicate that the optimal mix ratio of FLHSC is: fly ash floating beads 230 kg/m3, ceramsite 200 kg/m3, cement 1200 kg/m3, water 360 kg/m3, water-reducing agent 20.4 kg/m3. The water–binder ratio is selected as 0.3, type II water-reducing agent is selected, and the dosage is 1.7% of the cementitious material. Its slumps is 680 mm, and its dry bulk density is 1562.0 kg/m3, the 28-day strength is 52.4 MPa. On this basis, the microstructure and hydration products of FLHSC under different conditions were analyzed in depth using scanning electron microscopy and infrared spectroscopy, and the interface enhancement mechanism and failure mode were studied in depth. It is found that the failure of FLHSC is close to the vertical failure mode, and the crack always passes through the lightweight aggregate. In addition, a life cycle assessment and CO2 emission calculation from production to application were conducted on FLHSC. In addition, a life cycle assessment and CO2 emission calculation were conducted on FLHSC from production to application, and the results showed that FLHSC has better environmental benefits than ordinary C50 concrete, with a CO2 emission of 632.443 (kgCO2/t). Finally, the application of LWHSC was analyzed.
LC50 fly ash microbead lightweight high-strength concrete: mix ratio design, stress mechanism, and life cycle assessment
https://orcid.org/http://orcid.org/0000-0001-6138-4288
This study compared and evaluated the working performance and mechanical properties of LC50 fly ash microbead lightweight high-strength concrete (FLHSC) using fly ash microbeads, cement, water-reducing agent dosage, water–cement ratio, and types of additives as variables. Through reasonable design of expansion tests, bulk density tests, and mechanical strength tests, the basic optimal combination was obtained. The research results indicate that the optimal mix ratio of FLHSC is: fly ash floating beads 230 kg/m3, ceramsite 200 kg/m3, cement 1200 kg/m3, water 360 kg/m3, water-reducing agent 20.4 kg/m3. The water–binder ratio is selected as 0.3, type II water-reducing agent is selected, and the dosage is 1.7% of the cementitious material. Its slumps is 680 mm, and its dry bulk density is 1562.0 kg/m3, the 28-day strength is 52.4 MPa. On this basis, the microstructure and hydration products of FLHSC under different conditions were analyzed in depth using scanning electron microscopy and infrared spectroscopy, and the interface enhancement mechanism and failure mode were studied in depth. It is found that the failure of FLHSC is close to the vertical failure mode, and the crack always passes through the lightweight aggregate. In addition, a life cycle assessment and CO2 emission calculation from production to application were conducted on FLHSC. In addition, a life cycle assessment and CO2 emission calculation were conducted on FLHSC from production to application, and the results showed that FLHSC has better environmental benefits than ordinary C50 concrete, with a CO2 emission of 632.443 (kgCO2/t). Finally, the application of LWHSC was analyzed.
LC50 fly ash microbead lightweight high-strength concrete: mix ratio design, stress mechanism, and life cycle assessment
Arch. Civ. Mech. Eng.
Wang, Chao-qiang (Autor:in) / Yu, Lin (Autor:in) / Wang, Hao-ran (Autor:in) / Gao, Sheng-hui (Autor:in) / Huang, Jian-Shan (Autor:in) / Chen, Xi (Autor:in) / Shao, Meng-sheng (Autor:in)
06.11.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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