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<p>A 455-day uniaxial compressive creep test program was conducted on a total of 28 ALSCC cylindrical specimens, with variables including concrete strength, loading age, and reinforcement ratio. The results showed that under stable temperature and humidity, specimens loaded at earlier ages and with lower strength grades exhibited significantly higher creep coefficients. Specifically, after 400 days, specimens loaded at 7 and 14 days exhibited creep coefficients 11.7–21 and 1.3–6.7% higher, respectively, than those loaded at 28 days. In contrast, specimens loaded at 90 days exhibited a 50.8–60.0% reduction in creep coefficients. Before 100 days, the creep coefficient increased rapidly, indicating an accelerated creep phase. Between 100 and 200 days, the rate of increase slowed and stabilized. Reinforced ALSCC columns exhibited lower creep coefficients than unreinforced ones, with loading age having negligible effects in the later stages. A modified ALSCC multi-coefficient creep prediction model was developed, which considered loading age, strength grade, ambient temperature and humidity, and specimen dimensions. A comparative analysis of creep data revealed the average error and standard deviation between predicted and measured values were 4.4 and 4.9%, respectively, confirming the model achieved high accuracy in predicting the creep characteristics of lightweight aggregate concrete.</p>

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Research on the creep characteristics and predictive modeling of all-light shale ceramsite concrete

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Guohui Cao,
  • Jing Li,
  • Jiyang Shen,
  • Zehua Li,
  • Zaihua Zhang,
  • Jing Liu

摘要

A 455-day uniaxial compressive creep test program was conducted on a total of 28 ALSCC cylindrical specimens, with variables including concrete strength, loading age, and reinforcement ratio. The results showed that under stable temperature and humidity, specimens loaded at earlier ages and with lower strength grades exhibited significantly higher creep coefficients. Specifically, after 400 days, specimens loaded at 7 and 14 days exhibited creep coefficients 11.7–21 and 1.3–6.7% higher, respectively, than those loaded at 28 days. In contrast, specimens loaded at 90 days exhibited a 50.8–60.0% reduction in creep coefficients. Before 100 days, the creep coefficient increased rapidly, indicating an accelerated creep phase. Between 100 and 200 days, the rate of increase slowed and stabilized. Reinforced ALSCC columns exhibited lower creep coefficients than unreinforced ones, with loading age having negligible effects in the later stages. A modified ALSCC multi-coefficient creep prediction model was developed, which considered loading age, strength grade, ambient temperature and humidity, and specimen dimensions. A comparative analysis of creep data revealed the average error and standard deviation between predicted and measured values were 4.4 and 4.9%, respectively, confirming the model achieved high accuracy in predicting the creep characteristics of lightweight aggregate concrete.