轻质高性能混凝土力学性能及微观结构研究

摘要/Abstract

摘要： 轻质高性能混凝土(HPLC)具有密度小、强度高、耐久性优良的特点,在土木工程领域具有广阔的应用前景。根据改进的 Andreasen and Andersen模型设计HPLC初始配合比,探究不同掺量的页岩陶砂(SCS)对HPLC的工作性能、力学性能及耐久性的影响。此外,还探究了SCS对HPLC的微观形貌和孔结构的影响。研究表明:1)当SCS替代率为100%时,HPLC的表观密度为1 848.3 kg/m³,抗压强度达到123.22 MPa;2)掺入 SCS可以改善HPLC的力学性能,不同掺量的SCS使HPLC的抗压强度、抗折强度、弹性模量分别提高了8.88%~47.92%、22.50%~56.30%和3.49%~14.03%;3)掺入SCS可以改善HPLC的耐久性能,当SCS的替代率为100%时,HPLC的氯离子迁移系数较基准组降低了32.52%;4)由于SCS的掺入,HPLC的微观结构得到明显改善,使HPLC的孔隙率降低了14.86%~28.24%。

关键词: 轻质高性能混凝土, 页岩陶砂, 力学性能, 微观结构, 干燥收缩, 氯离子迁移系数

Abstract: High performance lightweight concrete (HPLC) characterized by low density, high strength and good durability, has prosperous application prospects in civil engineering. In this experiment, the modified Andreasen and Andersen model was used to design the initial mixture of HPLC. Shale ceramic sand (SCS) with different content was used to replace lightweight internal curing sand to prepare HPLC. The effect of different content of SCS on workability, mechanical properties and durability of HPLC were systematically investigated. In addition, this work explored the effect of SCS on the micro-morphology and pore structure of HPLC. It is found that: 1) When the replacement rate of SCS is 100%, the apparent density of HPLC is 1 848.3 kg/m³, and its compressive strength is 123.22 MPa. 2) The addition of SCS can improve the mechanical properties of HPLC, and the compressive strength, flexural strength and elastic modulus of HPLC increase by 8.88%~47.92%, 22.50%~56.30% and 3.49%~14.03%, respectively. 3) SCS can improve the durability of HPLC. When SCS replacement rate is 100%, the chloride migration coefficient of HPLC is reduced by 32.52%, compared to the control group. 4) Due to the addition of SCS, the microstructure of HPLC is significantly improved, and the porosity of HPLC reduces by 14.86%~28.24%.

Key words: high performance lightweight concrete, shale ceramic sand, mechanical property, microstructure, drying shrinkage, chloride migration coefficient

中图分类号:

TU528

褚洪岩, 安圆圆, 秦健健, 蒋金洋. 轻质高性能混凝土力学性能及微观结构研究[J]. 硅酸盐通报, 2023, 42(8): 2722-2732.

CHU Hongyan, AN Yuanyuan, QIN Jianjian, JIANG Jinyang. Mechanical Properties and Microstructure of High Performance Lightweight Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(8): 2722-2732.

参考文献

[1] KIM J H, CHOI S W, LEE K M, et al. Influence of internal curing on the pore size distribution of high strength concrete[J]. Construction and Building Materials, 2018, 192: 50-57.
[2] NEVILLE A, AÏTCIN P C. High performance concrete: an overview[J]. Materials and Structures, 1998, 31(2): 111-117.
[3] GOLIAS M, CASTRO J, WEISS J. The influence of the initial moisture content of lightweight aggregate on internal curing[J]. Construction and Building Materials, 2012, 35: 52-62.
[4] ZHANG J, HOU D W, CHEN H Y. Experimental and theoretical studies on autogenous shrinkage of concrete at early ages[J]. Journal of Materials in Civil Engineering, 2011, 23(3): 312-320.
[5] 姚运仕, 刘欢建, 任峰, 等. 高性能混凝土振动搅拌试验研究[J]. 硅酸盐通报, 2020, 39(3): 730-733.
YAO Y S, LIU H J, REN F, et al. Experimental study on vibration mixing of high-performance concrete[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(3): 730-733 (in Chinese).
[6] WEBER S, REINHARDT H W. A new generation of high performance concrete: concrete with autogenous curing[J]. Advanced Cement Based Materials, 1997, 6(2): 59-68.
[7] PRAMUSANTO P, NURROCHMAN A, MAMBY H E, et al. High strength lightweight concrete with expandable perlite as the aggregate[J]. IOP Conference Series: Materials Science and Engineering, 2020, 830(4): 042040.
[8] IBRAHIM M, AHMAD A, BARRY M S, et al. Durability of structural lightweight concrete containing expanded perlite aggregate[J]. International Journal of Concrete Structures and Materials, 2020, 14(1): 1-15.
[9] MOHAMMAD M, MASAD E, SEERS T, et al. Properties and microstructure distribution of high-performance thermal insulation concrete[J]. Materials, 2020, 13(9): 2091.
[10] PAPANICOLAOU C G, KAFFETZAKIS M I. Lightweight aggregate self-compacting concrete: state-of-the-art & pumice application[J]. Journal of Advanced Concrete Technology, 2011, 9(1): 15-29.
[11] LU J X, SHEN P L, ZHENG H B, et al. Development and characteristics of ultra high-performance lightweight cementitious composites (UHP-LCCs)[J]. Cement and Concrete Research, 2021, 145: 106462.
[12] XIE Y J, ZHOU Q Q, LONG G C, et al. Experimental investigation on mechanical property and microstructure of ultra-high-performance concrete with ceramsite sand[J]. Structural Concrete, 2022, 23(4): 2391-2404.
[13] XU F M, LIN X S, ZHOU A N. Performance of internal curing materials in high-performance concrete: a review[J]. Construction and Building Materials, 2021, 311: 125250.
[14] 刘家彬, 张明亮, 秦鸿根. 轻砂内养护剂的协同膨胀效应对微膨胀混凝土变形性能的影响[J]. 湖南大学学报(自然科学版), 2022, 49(3): 196-202.
LIU J B, ZHANG M L, QIN H G. Effect of synergistic expansion of light sand internal curing agent on deformation performance of micro-expansion concrete[J]. Journal of Hunan University (Natural Sciences), 2022, 49(3): 196-202 (in Chinese).
[15] 张高展, 葛竞成, 丁庆军, 等. 轻质超高性能混凝土的制备及性能形成机理[J]. 硅酸盐学报, 2021, 49(2): 381-390.
ZHANG G Z, GE J C, DING Q J, et al. Preparation and formation mechanism of lightweight ultra-high performance concrete[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 381-390 (in Chinese).
[16] LI P P, YU Q L, BROUWERS H J H. Effect of coarse basalt aggregates on the properties of ultra-high performance concrete (UHPC)[J]. Construction and Building Materials, 2018, 170: 649-659.
[17] LIM J, RAMAN S, SAFIUDDIN M, et al. Autogenous shrinkage, microstructure, and strength of ultra-high performance concrete incorporating carbon nanofibers[J]. Materials, 2019, 12(2): 320.
[18] WANG X P, YU R, SHUI Z H, et al. Development of a novel cleaner construction product: ultra-high performance concrete incorporating lead-zinc tailings[J]. Journal of Cleaner Production, 2018, 196: 172-182.
[19] VATANNIA S, KEARSLEY E, MOSTERT D. Development of economic, practical and green ultra-high performance fiber reinforced concrete verified by particle packing model[J]. Case Studies in Construction Materials, 2020, 13: e00415.
[20] FUNK J E, DINGER D R. Predictive process control of crowded particulate suspensions: applied to ceramic manufacturing[M]. Springer Science & Business Media, 2013.
[21] CHU H Y, GAO L, QIN J J, et al. Mechanical properties and microstructure of ultra-high-performance concrete with high elastic modulus[J]. Construction and Building Materials, 2022, 335: 127385.
[22] 中华人民共和国国家质量监督检验检验总局, 中国国家标准化管理委员会. 水泥胶砂流动度测定方法: GB/T 2419—2005[S]. 北京: 中国标准出版社, 2005.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. Test method for fluidity of cement mortar: GB/T2419—2005[S]. Beijing: Standards Press of China, 2005 (in Chinese).
[23] 中华人民共和国住房和城乡建设部, 国家市场监督管理总局. 混凝土物理力学性能试验方法标准: GB/T 50081—2019[S]. 北京: 中国建筑工业出版社, 2019.
Ministry of Housing and Urban-Rural Development of the People's Republic of China, State Market Regulatory Administration. Standard for test methods of physical and mechanical properties of concrete: GB/T 50081—2019[S]. Beijing: China Architecture & Building Press, 2019 (in Chinese).
[24] 国家市场监督管理总局, 国家标准化管理委员会. 水泥胶砂强度检验方法(ISO法): GB/T 17671—2021[S]. 北京: 中国标准出版社, 2021.
State Market Regulatory Administration, Standardization Administration of the People's Republic of China. Test method of cement mortar strength (ISO method): GB/T 17671—2021[S]. Beijing: Standards Press of China, 2021 (in Chinese).
[25] 张文华, 张仔祥, 刘鹏宇, 等. 多尺度纤维增强超高性能混凝土的轴心抗拉和抗压行为[J]. 硅酸盐学报, 2020, 48(8): 1155-1167.
ZHANG W H, ZHANG Z X, LIU P Y, et al. Uniaxial tensile and compressive stress-strain behavior of multi-scale fiber-reinforced ultra-high performance concrete[J]. Journal of the Chinese Ceramic Society, 2020, 48(8): 1155-1167 (in Chinese).
[26] 中华人民共和国住房和城乡建设部. 普通混凝土长期性能和耐久性能试验方法标准: GB/T 50082—2009[S]. 北京: 中国建筑工业出版社, 2009.
Ministry of Housing and Urban Rural Development of the People's Republic of China. Standard for test methods of long-term performance and durability of ordinary concrete: GB/T 50082—2009[S]. Beijing: China Architecture & Building Press, 2009 (in Chinese).
[27] EFNARC. Specification and guidelines for self-compacting concrete: EFNARC—2002[S]. Norfolk: European Federation for Specialist Construction Chemicals and Concrete Systems, 2002.
[28] DING Q J, XIANG W H, ZHANG G Z, et al. Effect of pre-wetting lightweight aggregates on the mechanical performances and microstructure of cement pastes[J]. Journal of Wuhan University of Technology-Mater Sci Ed, 2020, 35(1): 140-146.
[29] 李洋. 轻集料高强混凝土界面区形成与作用机制研究[D]. 合肥: 安徽建筑大学, 2016.
LI Y. Researches on the formation and action mechanism of interfacial transition zone in light aggregate high strength concrete[D]. Hefei: Anhui Jianzhu University, 2016 (in Chinese).
[30] 孙道胜, 李洋, 张高展. 轻集料混凝土界面区形成与作用机理研究进展[J]. 硅酸盐通报, 2016, 35(1): 185-191.
SUN D S, LI Y, ZHANG G Z. Review on the mechanism of formation and action of the interfacial transition zone in light aggregate concrete[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(1): 185-191 (in Chinese).
[31] 张高展, 葛竞成, 丁庆军, 等. 轻质超高性能混凝土的制备及性能形成机理[J]. 硅酸盐学报, 2021, 49(2): 381-390.
ZHANG G Z, GE J C, DING Q J, et al. Preparation and formation mechanism of lightweight ultra-high performance concrete[J]. Journal of the Chinese Ceramic Society, 2021, 49(2): 381-390 (in Chinese).
[32] 胡曙光, 王发洲, 丁庆军. 轻集料与水泥石的界面结构[J]. 硅酸盐学报, 2005, 33(6): 713-717.
HU S G, WANG F Z, DING Q J. Interface structure between lightweight aggregate and cement paste[J]. Journal of the Chinese Ceramic Society, 2005, 33(6): 713-717 (in Chinese).
[33] MENG W N, KHAYAT K. Effects of saturated lightweight sand content on key characteristics of ultra-high-performance concrete[J]. Cement and Concrete Research, 2017, 101: 46-54.
[34] OH B H, CHA S W, JANG B S, et al. Development of high-performance concrete having high resistance to chloride penetration[J]. Nuclear Engineering and Design, 2002, 212(1/2/3): 221-231.
[35] HE Z H, DU S G, CHEN D. Microstructure of ultra high performance concrete containing lithium slag[J]. Journal of Hazardous Materials, 2018, 353: 35-43.
[36] 张高展, 王宇譞, 葛竞成, 等. 轻集料对超高性能混凝土工作和力学性能的影响[J]. 建筑材料学报, 2021, 24(3): 499-507.
ZHANG G Z, WANG Y X, GE J C, et al. Effect of lightweight aggregate on workability and mechanical properties of ultra-high performance concrete[J]. Journal of Building Materials, 2021, 24(3): 499-507 (in Chinese).
[37] 丁庆军, 胡俊, 刘勇强, 等. 轻质超高性能混凝土的设计与研究[J]. 混凝土, 2019(9): 1-5.
DING Q J, HU J, LIU Y Q, et al. Research on preparation and performance of lightweight ultra high performance concrete[J]. Concrete, 2019(9): 1-5 (in Chinese).
[38] HE T, XIANG W H, ZHANG J A, et al. Influence of water-binder ratio on the mechanical strength and microstructure of arch shell interface transition zone[J]. Buildings, 2022, 12(4): 491.
[39] MENG L Q, ZHANG C X, WEI J Q, et al. Mechanical properties and microstructure of ultra-high strength concrete with lightweight aggregate[J]. Case Studies in Construction Materials, 2023, 18: e01745.