微珠对隧道工程混凝土性能的影响及机理研究

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发布时间：2020-01-06 00:00:00

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微珠对隧道工程混凝土性能的影响及机理研究

Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering

2022年第1期

微珠；力学性能；干燥收缩；水化热；早期抗裂性能；微观机理

Microbead; Mechanical property; Dry shrinkage performance; Heat hydration; Early cracking resistance; Micro-mechanism

2022年第1期

10.19761/j.1000-4637.2022.01.012.06

国家自然科学基金项目（52079048）；江苏省重点研发计划项目（BE2020780）。

王涛1，胡琪1，吴绍明2，储洪强1，陈峰2，赵文文1,丁天云1，蒋林华1

1.河海大学力学与材料学院，江苏南京 211100；2.广州市高速公路有限公司，广东广州 510000

王涛1，胡琪1，吴绍明2，储洪强1，陈峰2，赵文文1,丁天云1，蒋林华1

王涛,胡琪,吴绍明,等.微珠对隧道工程混凝土性能的影响及机理研究[J].混凝土与水泥制品,2022(1):12-16,21.

WANG Tao, HU Qi, WU Shao-ming,et al.Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering[J].China Concrete and Cement Products,2022(1):12-16,21.

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摘要：针对广州新白云国际机场隧道工程建设中大体积混凝土的温度裂缝问题，通过复掺微珠和粉煤灰，研究了微珠掺量对混凝土的力学性能、干燥收缩、水化热以及早期抗裂性能的影响，并采用SEM分析了微珠对水泥水化反应的作用机理。结果表明：当矿物掺合料总量一定时，随着微珠掺量的增加，混凝土的力学性能早期变化较小，后期呈现出先增加后下降的趋势，且微珠掺量为10%时，混凝土养护60 d的抗压强度、劈裂抗拉强度以及弹性模量最高；混凝土干缩率随着微珠掺量的增加而减小，且这种趋势随龄期的增加而增大，当微珠掺量15%时，60 d混凝土的干缩率最小；当微珠掺量为10%时，混凝土早期抗裂性能最佳，平板试件表面24 h内无裂缝；微珠掺量对胶凝材料水化热总量影响较小，但对水化放热峰值及峰值产生时间影响较大；微珠可以加速浆体早期的水化进程，减少硬化浆体的孔隙，使其结构更密实。 Abstract: In order to solve the temperature crack problem of the mass concrete structure in the construction of the Guangzhou New Baiyun International Airport tunnel engineering, the mechanism and effect of microbeads content on the macro-performance of concrete were performed, which specifically includes mechanical properties, dry shrinkage performance, heat hydration and early cracking resistance. Moreover, SEM was used for exploring the influence of microbeads on the hydration of cement. The results show that with the increase of microbeads content, the mechanical properties of concrete present no changes in the early stages, and increases first, then decreases in the later stages when the total content of mineral admixture is unchanged. When microbeads content is 10%, the compressive strength, splitting tensile strength and elastic modulus of concrete at 60 d are the highest. The dry shrinkage rates of concrete decrease with the increase of microbeads content, and the improvement becomes even bigger with the increase of curing age. The dry shrinkage of concrete at 60 d is the smallest when the content of microbeads is 15%. The early cracking resistance of concrete is the best with 10% microbeads, which can be manifested as no obvious cracks on the surface of the flat specimen within 24 h. Microbeads has little impact on the total hydration heat, and has a great influence on the peak and its arrival time of hydration exothermic rate. Microbeads can accelerate the early hydration process of cement and decrease the porosity of cement paste, which can make microstructure denser.

英文名 : Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering

刊期 : 2022年第1期

关键词 : 微珠；力学性能；干燥收缩；水化热；早期抗裂性能；微观机理

Key words : Microbead; Mechanical property; Dry shrinkage performance; Heat hydration; Early cracking resistance; Micro-mechanism

刊期 : 2022年第1期

DOI : 10.19761/j.1000-4637.2022.01.012.06

文章编号 :

基金项目 : 国家自然科学基金项目（52079048）；江苏省重点研发计划项目（BE2020780）。

作者 : 王涛1，胡琪1，吴绍明2，储洪强1，陈峰2，赵文文1,丁天云1，蒋林华1

单位 : 1.河海大学力学与材料学院，江苏南京 211100；2.广州市高速公路有限公司，广东广州 510000

王涛1，胡琪1，吴绍明2，储洪强1，陈峰2，赵文文1,丁天云1，蒋林华1

王涛,胡琪,吴绍明,等.微珠对隧道工程混凝土性能的影响及机理研究[J].混凝土与水泥制品,2022(1):12-16,21.

WANG Tao, HU Qi, WU Shao-ming,et al.Mechanism and Effect of Microbeads on the Properties of Concrete for the Tunnel Engineering[J].China Concrete and Cement Products,2022(1):12-16,21.

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摘要

参数

结论

参考文献

引用本文

Abstract: In order to solve the temperature crack problem of the mass concrete structure in the construction of the Guangzhou New Baiyun International Airport tunnel engineering, the mechanism and effect of microbeads content on the macro-performance of concrete were performed, which specifically includes mechanical properties, dry shrinkage performance, heat hydration and early cracking resistance. Moreover, SEM was used for exploring the influence of microbeads on the hydration of cement. The results show that with the increase of microbeads content, the mechanical properties of concrete present no changes in the early stages, and increases first, then decreases in the later stages when the total content of mineral admixture is unchanged. When microbeads content is 10%, the compressive strength, splitting tensile strength and elastic modulus of concrete at 60 d are the highest. The dry shrinkage rates of concrete decrease with the increase of microbeads content, and the improvement becomes even bigger with the increase of curing age. The dry shrinkage of concrete at 60 d is the smallest when the content of microbeads is 15%. The early cracking resistance of concrete is the best with 10% microbeads, which can be manifested as no obvious cracks on the surface of the flat specimen within 24 h. Microbeads has little impact on the total hydration heat, and has a great influence on the peak and its arrival time of hydration exothermic rate. Microbeads can accelerate the early hydration process of cement and decrease the porosity of cement paste, which can make microstructure denser.

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[1] 余建杰,宋固全,吴浪.基于MIDAS的大体积混凝土桩承台温度场有限元分析[J].混凝土与水泥制品,2012(5):34-37.
[2] 曹明莉,张聪.某筏板基础大体积混凝土裂缝分析与控制[J].混凝土与水泥制品,2011(11):56-59.
[3] 白伟,李骁春,张建,等.基于数值分析的早期混凝土温度控制技术[J].混凝土与水泥制品,2009(3):18-19.
[4] 王靖,王万金,夏义兵,等.超细粉煤灰对混凝土强度及水化产物的影响[J].混凝土与水泥制品,2016(12):24-26.
[5] 姚韦靖,庞建勇.超细粉煤灰与粉煤灰混凝土力学性能对比试验研究[J].混凝土与水泥制品,2015(12):10-13.
[6] 郑玉飞.低水胶比复合胶凝材料的水化程度及孔结构研究[D].北京:北京交通大学,2018.
[7] 严捍东.废渣特性及其多元复合对水泥基材料高性能的贡献与机理[D].南京:东南大学,2001.
[8] 马正先,周传贵,宋沛霖,等.复合矿物掺合料对超早强支座砂浆性能的影响[J].混凝土与水泥制品,2018(6):1-6.
[9] LI Y,BAO J L,GUO Y L.The Relationship Between Autogenous Shrinkage and Pore Structure of Cement Paste with Mineral Admixtures[J].Construction and Building Materials,2010,24(10):1855-1860.
[10] 贾福杰,李长成,刘立.掺超细灰混凝土早龄期体积稳定性研究[J].混凝土与水泥制品,2017(3):19-22.
[11] 高英力.超细粉煤灰高性能公路路面水泥混凝土早期收缩变形及抗裂性能研究[D].长沙:中南大学,2005.
[12] 徐海源,沙建芳,刘建忠,等.粉煤灰对水泥基材料流动性能影响及评价方法研究[J].混凝土与水泥制品,2014(12):86-90.
[13] WANG Q,WANG D Q,CHEN H H.The Role of Fly Ash Microsphere in the Microstructure and Macroscopic Properties of High-strength Concrete[J].Cement and Concrete Composites,2017,83:125-137.
[14] HAN X,YANG J B,FENG J J,et al.Research on Hydration Mechanism of Ultrafine Fly Ash and Cement Composite[J].Construction and Building Materials,2019,227:116697.
[15] 陈友治,张远,甘戈金,等.水泥-微珠二元胶材体系的水化特征及性能研究[J].新型建筑材料,2018,45(11):41-44.
[16] 杨梦卉.水工超高性能混凝土微细颗粒效应研究[D].武汉:武汉大学,2017.
[17] FAIZU A S,STEVE W M S.Compressive Strength and Durability Properties of High Volume Fly Ash(HVFA) Concretes Containing Ultrafine Fly Ash(UFFA)[J].Construction and Building Materials,2015,82:192-205.
[18] ZHANG W,WU F,ZHANG Y.Early Hydration and Setting Process of Fly Ash-blended Cement Paste Under Different Curing Temperatures[J].Journal of Wuhan University of Technology,2020,35(3):551-560.
[19] 侯东伟,张君,孙伟.基于早期变形特征的混凝土凝结时间的确定[J].硅酸盐学报,2009,37(7):1079-1084,1091.
[20] 商博明.粉煤灰结构及粉煤灰胶凝材料水化的微观研究[D].西安:西安建筑科技大学,2006.
[21] 丁庆军,韩冀豫,黄修林,等.微珠与硅灰、粉煤灰水化活性的对比研究[J].武汉理工大学学报,2011,33(3):54-57,115.

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微珠对隧道工程混凝土性能的影响及机理研究

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