凝灰岩石粉-粉煤灰低热水泥碾压混凝土性能演化规律及其相关性分析
Performance evolution and correlation analysis of tuff stone powder-fly ash low heat cement rolled compacted concrete
关键词：
低热水泥；碾压混凝土；凝灰岩石粉；力学性能；弹性模量；极限拉伸应变
Key words：
Low heat cement; Rolled compacted concrete; Tuff stone powder; Mechanical property; Elastic modulus; Ultimate tensile strain
刊期：
2025年第11期
DOI：
10.19761/j.1000-4637.2025.11.020.06
文章编号：
基金项目：
中国博士后科学基金项目（2024M763076）。
作者：
曹园章，谢国帅，宁全纪，黄亚康，陈 磊，王深圳
单位：
中国电建集团华东勘测设计研究院有限公司，浙江 杭州 310014
摘要
摘 要：研究了凝灰岩石粉对粉煤灰低热水泥碾压混凝土的抗压强度、劈裂抗拉强度、轴拉强度、弹性模量、极限拉伸应变的影响，分析了各性能的相关性。结果表明：采用低热水泥单掺粉煤灰或复掺粉煤灰和凝灰岩石粉的胶凝体系可配制出满足要求的碾压混凝土和常态混凝土；单掺粉煤灰的碾压混凝土早期抗压强度、弹性模量、极限拉伸应变基本低于复掺粉煤灰和凝灰岩石粉的碾压混凝土，但后期性能高于复掺粉煤灰和凝灰岩石粉的碾压混凝土；低热水泥混凝土的抗压强度、劈裂抗拉强度、轴拉强度、弹性模量、极限拉伸应变之间均呈正相关关系，并且相关系数均在0.9以上。
Abstract: The influence of tuff stone powder on the compressive strength, splitting tensile strength, axial tensile strength, elastic modulus, and ultimate tensile strain of fly ash low heat cement rolled compacted concrete was studied, and the correlation between various properties was analyzed. The results indicate that the combination of low heat cement with fly ash or a combination of fly ash and tuff stone powder can be used to prepare rolled compacted concrete and normal concrete with relatively good performance. The early compressive strength, elastic modulus, and ultimate tensile strain of rolled compacted concrete with single fly ash are basically lower than those of rolled compacted concrete with composite fly ash and tuff stone powder, but higher than those of rolled compacted concrete with composite fly ash and tuff stone powder in the later stage. The compressive strength, splitting tensile strength, axial tensile strength, elastic modulus, and ultimate tensile strain of low heat cement concrete are all positively correlated, and the correlation coefficients are all above 0.9.
结论
（1）采用低热水泥单掺粉煤灰或复掺粉煤灰和凝灰岩石粉的胶凝体系可配制出性能相对较好的碾压混凝土和常态混凝土。单掺粉煤灰的碾压混凝土早期抗压强度、弹性模量、极限拉伸应变均基本低于复掺粉煤灰和凝灰岩石粉的碾压混凝土，但后期性能基本高于复掺粉煤灰和凝灰岩石粉的碾压混凝土。
（2）相同抗压强度下，低热水泥混凝土的弹性模量试验值均基本低于相关标准计算值。本文拟合得到碾压混凝土和常态混凝土抗压强度与弹性模量的关系分别为
（3）低热水泥混凝土的抗压强度、劈裂抗拉强度、轴拉强度、弹性模量、极限拉伸应变之间均呈正相关关系，并且相关系数均在0.9以上。
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引用本文
曹园章,谢国帅,宁全纪,等.凝灰岩石粉-粉煤灰低热水泥碾压混凝土性能演化规律及其相关性分析[J].混凝土与水泥制品,2025(11):20-25.
CAO Y Z,XIE G S,NING Q J,Performance evolution and correlation analysis of tuff stone powder-fly ash low heat cement rolled compacted concrete[J].China Concrete and Cement Products,2025(11):20-25.
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