GGBFS含量和固化温度对混凝土早期强度和成熟度模型的影响
1Department of Smart City Engineering, Hanyang University, 1271 Sa 3-dong, Sangnok-gu, Ansan-si 15588, Republic of Korea.
Materials (Basel, Switzerland)
|October 16, 2025
概括
地质颗粒高炉渣 (GGBFS) 的混凝土强度由戈珀茨模型准确预测,特别是在较低的强度下. 这提高了可持续建筑材料的成熟度方法.
科学领域:
- 土木和材料工程 土木和材料工程
- 可持续的建筑材料 可持续的建筑材料
- 混凝土技术 混凝土技术
背景情况:
- 地质颗粒高炉渣 (GGBFS) 是一种可持续的补充水泥材料.
- 混凝土的早期强度发展对于施工时间表和安全至关重要.
- 护士-索尔成熟度方法被广泛用于预测混凝土强度,但需要准确的参数.
研究的目的:
- 为了研究混凝土的早期压力强度,使用不同的GGBFS替换水平和固化条件.
- 评估不同预测模型 (Plowman,Logistic,Gompertz) 对早期混凝土强度的性能.
- 确定GGBFS混合混凝土中的Nurse-Saul成熟度方法的最佳基准温度 (T0).
主要方法:
- 混凝土混合物准备了0%,20%和40%的GGBFS替代品,水与粘合剂的比率分别为35%,45%和55%.
- 固化温度有所变化 (5°C,20°C,35°C),并测量了和空气含量等新鲜性质.
- 应用了Nurse-Saul成熟度方法,并使用Plowman,Logistic和Gompertz模型预测压力强度.
主要成果:
- 纳入GGBFS减少了空气吸收减水添加剂 (AEWR) 的需要,高达72%.
- 确定了OPC和GGBFS混凝土的最佳基准温度 (T0) -3°C,与传统的-10°C不同.
- 戈珀茨模型显示了早期压力强度的优异预测准确性,特别是在3-5 MPa范围内,误差比Plowman模型低0.5-1 MPa.
结论:
- 戈珀茨模型为预测GGBFS混合混凝土的早期强度提供了更高的可靠性,特别是在具有挑战性的条件下.
- 优化数据温度 (T0) 提高了GGBFS混凝土成熟度方法的准确性.
- 这项研究支持使用GGBFS作为可持续的水泥替代品,并为需要早期强度评估的建筑项目提供实用见解.
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