Experimental Study on Uniaxial Compression Performance of High Strength Coral Concrete (HSCC)

Abstract

Abstract: Low strength and obvious defects in the aggregate lead to the difficulty of applying the coral concrete in high strength or special protective structures. The coral sand with small particle size gradation was used to completely replace coarse aggregate to prepare high strength coral concrete (HSCC). The basic mechanical properties, uniaxial compression properties and porosity of HSCC were systematically tested. The results show that the strength grade of HSCC prepared by optimizing the aggregate particle size and mix ratio is C105, and the ratio of axial compressive strength to cube compressive strength is between 0.86 and 0.94. The failure mode of HSCC without fiber is explosive failure, and the HSCC with 0.43% volume rate of polypropylene fiber (PPF) shows obvious ductile failure characteristics. After failure, it enters the turning point of residual strength at 20%~30% ultimate strength. The porosity of HSCC is about 4.7%~6.9%, and the dry apparent density is 2 230~2 310 kg/m³. There are few macroscopic pores on the surface, and it is found that the aggregate edge filling is good by scanning electron microscope.

Key words: high strength coral concrete, compressive strength, uniaxial compression, failure mode, stress-strain full curve

CLC Number:

TU528

ZHANG Jiwang, HUANG Manfeng, SU Shican, YI Jin, QIN Qinglong, WANG Lei. Experimental Study on Uniaxial Compression Performance of High Strength Coral Concrete (HSCC)[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(7): 2275-2282.

References

[1] RICHARD P, CHEYREZY M H. Reactive powder concretes with high ductility and 200~800 MPa compressive strength[J]. Special Publication, 1994, 144: 507-518.
[2] SAFDAR M, MATSUMOTO T, KAKUMA K. Flexural behavior of reinforced concrete beams repaired with ultra-high performance fiber reinforced concrete (UHPFRC)[J]. Composite Structures, 2016, 157: 448-460.
[3] 柳献,张姣龙,蒋子捷,等.UHPC加固盾构隧道衬砌结构试验[J].中国公路学报,2021,34(8):181-190.
LIU X, ZHANG J L, JIANG Z J, et al. Experimental investigations of a segmental tunnel ring strengthened by using UHPC[J]. China Journal of Highway and Transport, 2021, 34(8): 181-190 (in Chinese).
[4] YOO D Y, BANTHIA N, KIM S W, et al. Response of ultra-high-performance fiber-reinforced concrete beams with continuous steel reinforcement subjected to low-velocity impact loading[J]. Composite Structures, 2015, 126: 233-245.
[5] 糜人杰,余红发,麻海燕,等.全珊瑚骨料海水混凝土力学性能试验研究[J].海洋工程,2016,34(4):47-54.
MI R J, YU H F, MA H Y, et al. Study on the mechanical property of coral concrete[J]. The Ocean Engineering, 2016, 34(4): 47-54 (in Chinese).
[6] 柴源,牛勇,李文杰,等.珊瑚骨料混凝土改性技术研究进展[J].材料导报,2021,35(15):15134-15142.
CHAI Y, NIU Y, LI W J, et al. Research progress on improved technology of coral aggregate concrete[J]. Materials Reports, 2021, 35(15): 15134-15142 (in Chinese).
[7] WU W J, WANG R, ZHU C Q, et al. The effect of fly ash and silica fume on mechanical properties and durability of coral aggregate concrete[J]. Construction and Building Materials, 2018, 185: 69-78.
[8] 王磊,易金,邓雪莲,等.纤维增强珊瑚混凝土的力学性能研究及破坏形态分析[J].河南理工大学学报(自然科学版),2016,35(5):713-718.
WANG L, YI J, DENG X L, et al. Study on mechanical property and damage morphology analysis of coral aggregate concrete with fiber[J]. Journal of Henan Polytechnic University (Natural Science), 2016, 35(5): 713-718 (in Chinese).
[9] 胡尧,陈飞翔,张国志,等.珊瑚砂和玻璃微珠制备超高性能混凝土的试验研究[J].混凝土与水泥制品,2021(2):1-4.
HU Y, CHEN F X, ZHANG G Z, et al. Experimental study on preparation of ultra-high performance concrete with coral reef sand and glass microsphere[J]. China Concrete and Cement Products, 2021(2): 1-4 (in Chinese).
[10] 陈飞翔,陈尚雷,张国志,等.珊瑚礁砂制备超高性能混凝土的可行性研究[J].混凝土,2020(7):65-69.
CHEN F X, CHEN S L, ZHANG G Z, et al. Feasibility study on preparation of ultra high performance concrete with coral reef sand[J]. Concrete, 2020(7): 65-69 (in Chinese).
[11] 张志豪,水中和,余睿,等.礁石粉对超高强混凝土工作性能和力学性能的影响研究[J].硅酸盐通报,2017,36(12):3993-3998.
ZHANG Z H, SHUI Z H, YU R, et al. Effect of cement substitution by coral fillers on the workability and mechanical properties of UHSC[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(12): 3993-3998 (in Chinese).
[12] 王星尧.地聚合物基高性能全珊瑚混凝土的设计制备与性能研究[D].合肥:安徽建筑大学,2021.
WANG X Y. Study on manufacture and properties of geopolymer-based high performance coral aggregate concrete[D]. Hefei: Anhui Jianzhu University, 2021 (in Chinese).
[13] 袁银峰.全珊瑚海水混凝土的配合比设计和基本性能[D].南京:南京航空航天大学,2015.
YUAN Y F. Mix design and property of coral aggregate concrete[D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2015 (in Chinese).
[14] LI Y, ZHOU L, ZHANG Y, et al. Study on long-term performance of concrete based on seawater, sea sand and coral sand[J]. Advanced Materials Research, 2013, 706/707/708: 512-515.
[15] 达波,余红发,麻海燕,等.全珊瑚海水混凝土单轴受压应力-应变全曲线试验研究[J].建筑结构学报,2017,38(1):144-151.
DA B, YU H F, MA H Y, et al. Experimental research on whole stress-strain curves of coral aggregate seawater concrete under uniaxial compression[J]. Journal of Building Structures, 2017, 38(1): 144-151 (in Chinese).
[16] DA B, YU H F, MA H Y, et al. Experimental investigation of whole stress-strain curves of coral concrete[J]. Construction and Building Materials, 2016, 122: 81-89.
[17] 陈兆林,孙国峰,唐筱宁,等.岛礁工程海水拌养珊瑚礁、砂混凝土修补与应用研究[J].海岸工程,2008,27(4):60-69.
CHEN Z L, SUN G F, TANG X N, et al. Study on applications of concretes from coral reef sand mixed with seawater for patching-up in reef engineering[J]. Coastal Engineering, 2008, 27(4): 60-69 (in Chinese).
[18] 袁征.高强珊瑚混凝土配合比工艺与抗压特性研究[D].南宁:广西大学,2017.
YUAN Z. Research on the proportion and compressive property of high-strength coral reef concrete[D]. Nanning: Guangxi University, 2017 (in Chinese).
[19] HUANG Y J, HE X J, SUN H S, et al. Effects of coral, recycled and natural coarse aggregates on the mechanical properties of concrete[J]. Construction and Building Materials, 2018, 192: 330-347.
[20] 叶列平.混凝土结构[M].北京清华大学出版社,2002.
YE L P. Concrete structure[M]. Beijing: Tsinghua University Press, 2002 (in Chinese).
[21] 丁发兴,应小勇,余志武.轻骨料混凝土单轴力学性能统一计算方法[J].中南大学学报(自然科学版),2010,41(5):1973-1979.
DING F X, YING X Y, YU Z W. Unified calculation method of uniaxial mechanical properties of lightweight aggregate concrete[J]. Journal of Central South University (Science and Technology), 2010, 41(5): 1973-1979 (in Chinese).
[22] 韩超.海水拌养珊瑚混凝土基本力学性能试验研究[D].南宁:广西大学,2011.
HAN C. Experimental study on basic mechanical properties of coral concrete mixed with seawater[D]. Nanning: Guangxi University, 2011 (in Chinese).
[23] 郭超.南海岛礁珊瑚集料混凝土工程性能研究[D].南京:东南大学,2017.
GUO C. Study on engineering properties of coral aggregate concrete in South China Sea[D]. Nanjing: Southeast University, 2017 (in Chinese).
[24] 高屹,韦灼彬,孙潇.珊瑚骨料混凝土基本力学性能试验研究[J].海军工程大学学报,2017,29(1):64-68.
GAO Y, WEI Z B, SUN X. Experimental research on basic mechanical properties of coral aggregate concrete[J]. Journal of Naval University of Engineering, 2017, 29(1): 64-68 (in Chinese).
[25] 周杰.珊瑚混凝土制备技术与物理力学性能试验研究[D].南京:河海大学,2015.
ZHOU J. Preparation technology and experimental research on the physical and mechanical properties of coral concrete[D]. Nanjing: Hehai University, 2015 (in Chinese).
[26] WANG Y, ZHANG S H, NIU D T, et al. Strength and chloride ion distribution brought by aggregate of basalt fiber reinforced coral aggregate concrete[J]. Construction and Building Materials, 2020, 234: 117390.
[27] WANG L, SHEN N, YU D P, et al. Strengthening mechanism and microstructure of fibre-reinforced coral mortar and concrete[J]. Proceedings of the Institution of Civil Engineers-Structures and Buildings, 2021: 1-11.
[28] 王振宇,丁建彤,郭玉顺.结构轻骨料混凝土的应力-应变全曲线[J].混凝土,2005(3):39-41+66.
WANG Z Y, DING J T, GUO Y S. Stress-Strain curves of structural lightweight aggregate concretes[J]. Concrete, 2005(3): 39-41+66 (in Chinese).