Crack Propagation and Damage Evolution in Polypropylene Fiber Reinforced Concrete with Cracks under Axis Compression

Abstract

Abstract: To investigate the effects of polypropylene fiber (PPF) content and prefabricated crack angle on the crack propagation and failure mode of concrete under compression, uniaxial compression tests were conducted on plain concrete and polypropylene fiber concrete (PFRC) with different crack angles. The internal damage process was collected using an acoustic emission (AE) monitoring system, and the failure mode and AE localization map of specimens were analyzed. The relationship between PPF content, prefabricated crack angle, stress-strain curve, AE parameters and other indicators was explored. Research has shown that as the content of PPF increases, the number and propagation range of cracks in specimen decrease first and then increase, and the peak stress increases first and then decreases. Its failure mode changes from tensile failure to tensile shear or shear failure. The mechanism of PPF is that when the content is appropriate, it can play a good bridging role inside the matrix, while when it is excessive, it is easy to form clusters, leading to an increase in internal weak surfaces, indicating that PPF has positive and negative effects on the reinforcement effect of concrete. As the angle of prefabricated cracks increases, the peak stress shows a trend of decreasing first and then increasing. Among them, there is a certain synergistic effect between inclined non horizontal angle prefabricated cracks and high content PPF, and several types of prefabricated crack angles that are sensitive to changes in compressive strength and PPF content of the specimens are found. Finally, analyzing the AE data, it is found that the addition of PPF increases the number and distribution of positioning points in the AE localization map. The activity time of AE signals from the beginning to the peak is prolonged with the increase of PPF content, indicating that PPF has a crack resistance and toughening effect on concrete.

Key words: polypropylene fiber, prefabricated crack, crack propagation, acoustic emission, damage evolution

CLC Number:

TU528.041

WANG Xueqing, LI Yongchao, ZHANG Xuerui, ZHAO Yunmeng, JIANG Yufeng. Crack Propagation and Damage Evolution in Polypropylene Fiber Reinforced Concrete with Cracks under Axis Compression[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2404-2414.

References

[1] BAGHERZADEH R, SADEGHI A H, LATIFI M. Utilizing polypropylene fibers to improve physical and mechanical properties of concrete[J]. Textile Research Journal, 2012, 82(1): 88-96.
[2] KARAHAN O, ATI C D. The durability properties of polypropylene fiber reinforced fly ash concrete[J]. Materials & Design, 2011, 32(2): 1044-1049.
[3] 刘波, 张绪涛, 尹瑞杰, 等. 聚丙烯纤维混凝土研究综述[J]. 四川水泥, 2021(1): 5-6.
LIU B, ZHANG X T, YIN R J, et al. Summary of research on polypropylene fiber concrete[J]. Sichuan Cement, 2021(1): 5-6 (in Chinese).
[4] 刘晓仙, 杜红秀. 聚丙烯纤维对混凝土高温后性能的影响[J]. 消防科学与技术, 2020, 39(2): 173-176.
LIU X X, DU H X. Effect of polypropylene fiber on the performance of concrete after high temperature[J]. Fire Science and Technology, 2020, 39(2): 173-176 (in Chinese).
[5] 李学英, 张赛镭, 赵晶, 等. 改性聚丙烯纤维混凝土力学性能的研究[C]//纤维混凝土的技术进展与工程应用——第十一届全国纤维混凝土学术会议论文集. 大连, 2006: 179-182.
LI X Y, ZHANG S L, ZHAO J, et al. Research on the mechanical properties of modified polypropylene fiber reinforced concrete[C]//Technical Progress and Engineering Application of Fiber Reinforced Concrete—Proceedings of the 11th National Academic Conference on Fiber Reinforced Concrete. Dalian, 2006: 179-182 (in Chinese).
[6] 李学英. 改性聚丙烯纤维混凝土的性能研究[D]. 哈尔滨: 哈尔滨工业大学, 2003.
LI X Y. Study on properties of modified polypropylene fiber concrete[D].Harbin: Harbin Institute of Technology, 2003 (in Chinese).
[7] 邵晓蓉, 王柏生. 钢筋聚丙烯纤维混凝土简支梁的受弯试验[J]. 河南大学学报(自然科学版), 2008, 38(3): 327-330.
SHAO X R, WANG B S. Experiment on the flexural properties of simply supported polypropylene fibers reinforced concrete beams[J]. Journal of Henan University (Natural Science), 2008, 38(3): 327-330 (in Chinese).
[8] BANTHIA N, GUPTA R. Influence of polypropylene fiber geometry on plastic shrinkage cracking in concrete[J]. Cement and Concrete Research, 2006, 36(7): 1263-1267.
[9] NAJM H, BALAGURU P. Effect of large-diameter polymeric fibers on shrinkage cracking of cement composites[J]. ACI Materials Journal, 2002, 99(4): 345-351.
[10] 桂锡军. 聚丙烯纤维混凝土在水利工程中的应用[J]. 吉林农业, 2018(14): 69.
GUI X J. Application of polypropylene fiber concrete in water conservancy project[J]. Agriculture of Jilin, 2018(14): 69 (in Chinese).
[11] 丁一宁, 王卿, 林宇栋. 纤维对开裂后混凝土渗透性及裂缝恢复的影响[J]. 复合材料学报, 2017, 34(8): 1853-1861.
DING Y N, WANG Q, LIN Y D. Effect of fibers on permeability and crack relaxation of cracked concrete[J]. Acta Materiae Compositae Sinica, 2017, 34(8): 1853-1861 (in Chinese).
[12] 徐子瑶, 虞松, 付强, 等. 地铁喷浆用纤维增强混凝土的试验研究与数值模拟[J]. 地下空间与工程学报, 2020, 16(增刊 2): 554-563.
XU Z Y, YU S, FU Q, et al. Experimental study and numerical simulation of fiber reinforced concrete for shotcrete in subway[J]. Chinese Journal of Underground Space and Engineering, 2020, 16(supplement 2): 554-563 (in Chinese).
[13] 徐礼华, 黄彪, 李彪, 等. 循环荷载作用下聚丙烯纤维混凝土受压应力-应变关系研究[J]. 土木工程学报, 2019, 52(4): 1-12.
XU L H, HUANG B, LI B, et al. Study on the stress-strain relation of polypropylene fiber reinforced concrete under cyclic compression[J]. China Civil Engineering Journal, 2019, 52(4): 1-12 (in Chinese).
[14] 张建峰, 罗平, 周世华. 纤维对混凝土早期塑性开裂的影响[J]. 混凝土, 2010(7): 76-78.
ZHANG J F, LUO P, ZHOU S H. Influence of fiber on early plastic cracking of concrete[J]. Concrete, 2010(7): 76-78 (in Chinese).
[15] 任县伟. 纤维对混凝土力学性能及开裂后抗渗性能的影响[D]. 大连: 大连理工大学, 2016.
REN X W. Effects of fibers on mechanical properties and permeability of cracked concrete[D].Dalian: Dalian University of Technology, 2016 (in Chinese).
[16] 丁一宁, 任县伟, 李冬. 结构型钢纤维对混凝土单裂缝渗透特性的影响[J]. 水利学报, 2017, 48(1): 13-20.
DING Y N, REN X W, LI D. Investigation of the fiber effect on the permeability of cracked concrete[J]. Journal of Hydraulic Engineering, 2017, 48(1): 13-20 (in Chinese).
[17] 中华人民共和国住房和城乡建设部. 普通混凝土拌合物性能试验方法标准: GB/T 50080—2016[S]. 北京: 中国建筑工业出版社, 2017.
Ministry of Housing and Urban Rural Development of the People’s Republic of China. Standard for testing the performance of ordinary concrete mixtures: GB/T 50080—2016[S]. Beijing: China Construction Industry Press, 2017 (in Chinese).
[18] 中华人民共和国建设部, 国家质量监督检验检疫总局. 普通混凝土力学性能试验方法标准: GB/T 50081—2002[S]. 北京: 中国建筑工业出版社, 2003.
Ministry of Construction of the People’s Republic of China, General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. Standard for test methods for mechanical properties of ordinary concrete: GB/T 50081—2002[S]. Beijing: China Construction Industry Press, 2003 (in Chinese).
[19] GHASEMI M, GHASEMI M R, MOUSAVI S R. Investigating the effects of maximum aggregate size on self-compacting steel fiber reinforced concrete fracture parameters[J]. Construction and Building Materials, 2018, 162(20): 674-682.
[20] 程爱平, 舒鹏飞, 张玉山, 等. 充填体-围岩组合体声发射特征与损伤本构研究[J]. 采矿与安全工程学报, 2020, 37(6): 1238-1245.
CHENG A P, SHU P F, ZHANG Y S, et al. Acoustic emission characteristics and damage constitution of backfill-surrounding rock combination[J]. Journal of Mining & Safety Engineering, 2020, 37(6): 1238-1245 (in Chinese).