原状海砂对混凝土力学性能的影响
Influence of Undisturbed Sea Sand on Mechanical Properties of Concrete
郑建岚 1王雅思 1叶艳2
作者信息
- 1. 福建江夏学院工程学院,福州 350108;福建省环保节能型高性能混凝土协同创新中心,福州 350108
- 2. 福建省环保节能型高性能混凝土协同创新中心,福州 350108;福州大学土木工程学院,福州 350108
- 折叠
摘要
为探究高氯盐、高贝壳含量原状海砂混凝土的力学性能,以海砂的氯离子含量和贝壳含量为变量,设计并配制9组海砂混凝土,开展混凝土立方体抗压强度试验和单轴受压应力-应变全曲线试验.结果表明:随着氯离子含量增加,混凝土的孔结构细化,早期强度提高,单轴受压应力-应变全曲线峰值应力增大,峰值应变降低,弹性模量提高;随着贝壳含量增加,混凝土坍落度显著下降,混凝土的孔结构较疏松,强度降低,单轴受压应力-应变全曲线峰值应力降低,峰值应变增大,弹性模量降低.在现有模型基础上,提出关于氯离子含量、贝壳含量的模型参数计算式.
Abstract
In order to explore the mechanical properties of undisturbed sea sand concrete with high chlorine concentration and high shell content,taking the chloride ion content and shell content of sea sand as variables,nine groups of sea sand concrete were designed and prepared to carry out concrete cube compressive strength test and uniaxial compressive stress-strain curve test,and compared with ordinary concrete.The results show that with the increase of chloride ion content,the pore structure of concrete becomes finer,the early strength increases,the peak stress of uniaxial compressive stress-strain complete curve increases,the peak strain decreases,and the elastic modulus increases.With the increase of shell content,the slump of concrete decreases significantly,the pore structure of concrete becomes looser,the strength decreases,and the peak stress of uniaxial compressive stress-strain complete curve decreases,the peak strain increases,and the elastic modulus decreases.Finally,based on the existing models,the formula for calculating the model parameters of chloride ion content and shell content is put forward.
关键词
海砂混凝土/原状海砂/单轴受压/应力-应变全曲线/氯离子含量/贝壳含量Key words
sea sand concrete/undisturbed sea sand/uniaxial compression/stress-strain complete curve/chlorine ion content/shell content引用本文复制引用
基金项目
国家自然科学基金重点项目(U1605242)
福建省财政厅专项(闽财指[2022]840号)
福建省自然科学基金(2021J011231)
福建省教育厅中青年教师教育科研项目(JAT200368)
出版年
2024
国家科技期刊平台
NSTL
万方数据