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硫酸盐作用下轻骨料混凝土受压细观裂纹扩展及演变规律

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Keywords: 桥梁工程,轻骨料混凝土,试验研究,硫酸盐,细观,裂纹扩展

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Abstract:

?为了给轻骨料混凝土在桥梁中的拓展应用提供理论基础,利用一级粉煤灰等体积取代30%普通砂,硅灰等质量取代10%水泥,并用破碎型和圆球型页岩陶粒制备了2种轻骨料混凝土。通过强度试验、工业CT试验、硫酸盐溶液干湿循环等试验,对抗蚀性、断面CT数、裂纹演变规律、裂纹增速影响因子进行了研究,分析了轻骨料混凝土在硫酸盐腐蚀作用下,细观裂纹扩展及动态演变规律。结果表明:在质量分数为5%的Na2SO4溶液作用下,干湿循环50次后,破碎型和圆球型页岩陶粒轻骨料混凝土抗蚀系数分别为普通混凝土的1.12倍和1.17倍,且其破坏面主要表现为贯穿骨料破坏;试样从微裂纹产生到整体破坏大体可分为压密、裂纹萌生发展、裂纹扩展贯通和破坏4个阶段;随着干湿循环次数的增加,轻骨料混凝土裂纹增速影响因子和弹性模量损失均小于普通混凝土,且破碎型轻骨料混凝土略大于圆球型轻骨料混凝土。

References

[1]  王海龙,申向东.粉煤灰对轻骨料混凝土耐久性影响的试验研究[J].新型建筑材料,2009(4):1-4. WANG Hai-long,SHEN Xiang-dong.Experimental Study on Influence of Fly Ash on Durability of Lightweight Aggregate Concrete[J].New Building Materals,2009(4):1-4.
[2]  KIM H K,JEON J H,LEE H K.Workability,and Mechanical,Acoustic and Thermal Properties of Light-weight Aggregate Concrete with a High Volume of Entrained Air[J].Construction and Building Materials,2012,29(4):193-200.
[3]  CASTRO J,KEISER L,GOLIAS M,et al.Absorption and Desorption Properties of Fine Lightweight Aggregate for Application to Internally Cured Concrete Mixtures[J].Cement and Concrete Composites,2011,33(10):1001-1008.
[4]  田耀刚,胡曙光,丁庆军,等.轻集料混凝土的抗硫酸盐侵蚀性能研究[J].新型建筑材料,2006(5):61-63. TIAN Yao-gang,HU Shu-guang,DING Qing-jun,et al.Study on Sulfate Resistance of Lightweight Aggregate Concrete[J].New Building Materials,2006(5):61-63.
[5]  黄盛楠,刘英奎,叶列平,等.预应力高强轻骨料混凝土连续刚构桥的试验研究[J].工程力学,2007,24(增1):134-140. HUANG Sheng-nan,LIU Ying-kui,YE Lie-ping,et al.Experimental Study on Prestressed-high-strength-light-weight-concrete Continuous Rigid Frame Bridge[J].Engineering Mechanics,2007,24(S1):134-140.
[6]  SCHAUMANN E,VALLéE T,KELLER T.Direct Load Transmission in Hybrid FRP and Lightweight Concrete Sandwich Bridge Deck[J].Composites:Part A,2008,39(3):478-487.
[7]  王立成,刘汉勇,HIWADA K.硅灰对轻骨料混凝土抗海水冻融性能的影响[J].建筑材料学报,2005,8(4):349-355. WANG Li-cheng,LIU Han-yong,HIWADA K.Influences of Silica Fume on the Property of Lightweight Aggregate Concrete with Resistance to Freezing and Thawing Cycles in Seawater[J].Journal of Building Materials,2005,8(4):349-355.
[8]  银 俊.轻骨料混凝土梁受力性能研究[D].包头:内蒙古科技大学,2010. YIN Jun.Study on Behavior of Lightweight Aggregate Concrete Beams[D].Baotou:Inner Mongolia Un-iversity of Science and Technology,2010.
[9]  MELBY K,JORDET E A,HANSVOLD C.Long-span Bridges in Norway Constructed in High-strength LWA Concrete[J].Engineering Structures,1996,18(11):845-849.
[10]  LO T Y,NADEEM A,TANG W C P,et al.The Effect of High Temperature Curing on the Strength and Carbonation of Pozzolanic Structural Lightweight Concretes[J].Construction and Building Materials,2009,23(3):1306-1310.
[11]  赵自然,康克军,陈志强,等.适用于高分辨率大型工业CT的实时重建检查方案[J].清华大学学报:自然科学版,2002,42(8):1001-1004. ZHAO Zi-ran,KANG Ke-jun,CHEN Zhi-qiang,et al.Real Time Reconstruction and Inspection Scheme Used in High Resolution Industry CT[J].Journal of Tsinghua University:Science and Technology,2002,42(8):1001-1004.
[12]  党发宁,刘彦文,丁卫华,等.基于破损演化理论的混凝土CT图像定量分析[J].岩石力学与工程学报,2007,26(8):1588-1593. DANG Fa-ning,LIU Yan-wen,DING Wei-hua,et al.Quantitative Analysis of Concrete CT Images Based on Damage-fracture Evolution Theory[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(8):1588-1593.
[13]  STOCK S R,NAIK N K,WILKINSON A P.X-ray Microtomography (MicroCT) of the Progression of Sulfate Attack of Cement Paste[J].Cement and Concrete Research,2002,32(10):1673-1675.
[14]  CHOTARD T J,BONCOEUR-MARTEL M P,SMITH A,et al.Application of X-ray Computed Tomography to Characterise the Early Hydration of Calcium Aluminate Cement[J].Cement and Concrete Composites,2003,25(1):145-152.
[15]  郭东明,左建平,张 慧,等.高强混凝土裂纹扩展规律的CT观察[J].硅酸盐学报,2009,37(10):1607-1612. GUO Dong-ming,ZUO Jian-ping,ZHANG Hui,et al.Mechanics of Crack Propagation in High Performance Concrete and Its Fractal Dimensions Based on CT Observation[J].Journal of the Chinese Ceramic Society,2009,37(10):1607-1612.
[16]  孙海林,叶列平,丁建彤,等.高强轻骨料混凝土收缩和徐变试验[J].清华大学学报:自然科学版,2007,47(6):765-767,780. SUN Hai-lin,YE Lie-ping,DING Jian-tong,et al.Shrinkage and Creep of High-strength Lightweight Aggregate Concrete[J].Journal of Tsinghua University:Science and Technology,2007,47(6):765-767,780.
[17]  王立成,刘汉勇.海水冻融后轻骨料混凝土的双轴压压强度和变形性能[J].水利学报,2006,37(2):189-194. WANG Li-cheng,LIU Han-yong.Strength and Deformation Characteristics of Lightweight Aggregate Concrete Under Biaxial Compressive Stress After Freeze-thaw Cycling in Seawater[J].Journal of Hydraulic Engineering,2006,37(2):189-194.
[18]  高英力,程 领,李 柯,等.碳化作用下骨料混凝土干缩变形及影响规律[J].硅酸盐通报,2012,31(2):440-444,463. GAO Ying-li,CHENG Ling,LI Ke,et al.Influence Laws and Dry Shrinkage of Lightweight Aggregate Concrete Under the Carbonization[J].Bulletin of the Chinese Ceramic Society,2012,31(2):440-444,463.

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