张斌林,李波,张兴军,等. 热活化油页岩半焦对混凝土力学性能的影响研究[J]. 水利水运工程学报,2023(5):139-148. doi: 10.12170/20220609002
引用本文: 张斌林,李波,张兴军,等. 热活化油页岩半焦对混凝土力学性能的影响研究[J]. 水利水运工程学报,2023(5):139-148. doi: 10.12170/20220609002
(ZHANG Binlin, LI Bo, ZHANG Xingjun, et al. Effect of thermal activated oil shale semi-coke on the mechanicalproperties of concrete[J]. Hydro-Science and Engineering, 2023(5): 139-148. (in Chinese)). doi: 10.12170/20220609002
Citation: (ZHANG Binlin, LI Bo, ZHANG Xingjun, et al. Effect of thermal activated oil shale semi-coke on the mechanicalproperties of concrete[J]. Hydro-Science and Engineering, 2023(5): 139-148. (in Chinese)). doi: 10.12170/20220609002

热活化油页岩半焦对混凝土力学性能的影响研究

Effect of thermal activated oil shale semi-coke on the mechanicalproperties of concrete

  • 摘要: 为研究热活化油页岩半焦对混凝土力学性能的影响,选取300、400、500和600 ℃高温煅烧后的油页岩半焦,以5%~25%的掺量替代水泥制备半焦混凝土,测试油页岩半焦混凝土的抗压、抗折强度;借助核磁共振技术分析半焦混凝土内部孔隙信息,剖析半焦混凝土的强度和孔隙率的关系。结果表明:随着油页岩半焦煅烧温度的升高,半焦混凝土的抗压、抗折强度先升后降,500 ℃时力学性能最好;随着油页岩半焦掺量的增加,半焦混凝土的抗压、抗折强度先升后降,掺量为15%时混凝土力学性能最好;半焦混凝土内部以小孔隙居多,其孔隙率随油页岩半焦掺量的增加先减后增,掺量为15%时混凝土孔隙率最小。

     

    Abstract: In order to investigate the effect of thermally activated oil shale semi-coke on the mechanical properties of concrete, oil shale semi-coke after high temperature calcination at 300 ℃, 400 ℃, 500 ℃ and 600 ℃ was selected. Semi-coke concrete was prepared by replacing cement with 5%-25% of the oil shale semi-coke. The compressive and flexural strengths of the semi-coke concrete were tested. The internal pore information of the semi-coke concrete was analyzed by nuclear magnetic resonance, while the relationship between the strength and porosity of the semi-coke concrete was studied. The results showed that with the increase of the calcination temperature for the oil shale semi-coke, the compressive and flexural strengths of the semi-coke concrete first increased and then decreased, with the optimal mechanical properties at 500 ℃. With the increase of the oil shale semi-coke content, the compressive and flexural strengths of the semi-coke concrete first increased and then decreased, where the optimal mechanical properties were achieved at a semi-coke content of 15%. The internal structure of the semi-coke concrete had many small pores. The porosity of the semi-coke concrete first decreased and then increased with the increase of the oil shale semi-coke content, where the minimum porosity was obtained at a semi-coke content of 15%.

     

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