高抗裂机制砂在严寒隧道衬砌混凝土中的应用  

Application of High Crack Resistant Machine-made Sand in Tunnel Lining Concrete in Severe Cold Area

作　　者：柴松华 CHAI Songhua(College of CML Engineering and Architecture,Yuncheng Vocational and Technical University,Yuncheng 044000,China)

机构地区：[1]运城职业技术大学建筑工程学院,山西运城044000

出　　处：《常州工学院学报》2024年第3期25-30,共6页Journal of Changzhou Institute of Technology

基　　金：运城职业技术大学校级科学研究项目(KY2019-5)。

摘　　要：为保证工程质量安全,选定目标隧道,针对工程特征以及原料性能,分析混凝土的力学性能、耐久性、抗冻性以及抗渗性,得到合适的高抗裂机制砂混凝土配合比。根据对混凝土的抗压强度、抗折强度以及弹性模量分析,得到衬砌混凝土的最优配比设定如下:水泥260 kg/m^(3)、粉煤灰105 kg/m^(3)、矿渣粉65 kg/m^(3)、原状机制砂780 kg/m^(3)、碎石1075 kg/m^(3)、水150 kg/m^(3)、减水剂2.85 kg/m^(3)。通过试验验证高抗裂机制砂在严寒地区隧道衬砌混凝土中的应用效果,证实了应用机制砂后可有效提升工程质量和经济性。To ensure the quality and safety of a project,the target tunnel is selected.Based on the engineering characteristics and raw material performance,the mechanical properties,durability,frost resis-tance,and impermeability of the concrete are analyzed to obtain a suitable high crack resistance mechanism sand concrete mix ratio.Based on the analysis of compressive strength,flexural strength,and elastic modulus of concrete,the optimal mix ratio for lining concrete is set as follows:cement 260 kg/m^(3),fly ash 105 kg/m^(3),slag powder 65 kg/m^(3),undisturbed machine-made sand 780 kg/m^(3),crushed stone 1075 kg/m^(3),water 150 kg/m^(3),water reducer 2.85 kg/m^(3).The application effect of high crack resistance mechanism sand in tunnel lining concrete in severe cold areas is verified through experiments.It has been confirmed that the application of machine-made sand can effectively improve the quality of engineering and further enhance the economy of concrete preparation.

关 键 词：机制砂 耐久性 隧道衬砌混凝土 抗压性 严寒地区 

分 类 号：TU528[建筑科学—建筑技术科学]