集料和纤维掺量对LTCC力学性能和微观结构的影响

doi:10.11896/cldb.19100069

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (9584KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to optimize lightweight toughness cement-based composites (LTCC), cenospheres and floating beads were used as aggregates, and hydrophilic polyvinyl alcohol (HPVA) fibers and polypropylene (PP) fibers were added. 12 groups of specimens were prepared to investigate the influence of aggregate and fiber contents on the compressive and flexural strength, bending toughness, tensile ductility and capillary water absorption of LTCC. Scanning electron microscopy was used to observe the microscopic morphology of the aggregates and the failure mode of the fiber after LTCC destruction. The results show that the apparent density of LTCC is 1 612 kg/m³ when the contents of cenospheres are 20% and the volume of HPVA fibers is 1.5%. The compressive strength and flexural strength of LTCC are 60.06 MPa and 20.55 MPa, respectively, and the ultimate tensile strain reaches 2.05%. Cenospheres and floating beads can fill tiny pores and refine the internal pores of LTCC, and thus reduce its capillary water absorption capacity. Cenospheres have higher pozzolanic activity and promote hydration reaction to produce hydration products with high Si/Ca ratio, which can improve the interfacial transition zone between aggregate and cement matrix, thereby improving the bending toughness and tensile ductility of LTCC.

Key words： lightweight cenosphere floating beads bending toughness microstructure pozzolanic activity

Published: 12 September 2020

CLC number:

TU528

Fund:This work was financially supported by Zhejiang Provincial Transportation Science and Technology Project of China (2018C03029) and Zhejiang Provincial Construction Research Project of China (2018K021).

About author:: Wenhua Chen, Ph.D. student, College of Civil Engineering and Architecture, Zhejiang University. He is mainly engaged in research on high performance concrete and new materials for road engineering.
Zhiyi Huang, professor, College of Civil Engineering and Architecture, Zhejiang University, doctoral tutor. His team's main research areas: modern road construction and maintenance of new materials and new tech-nologies, traffic safety and energy-saving new technology, tunnel health monitoring and fire safety, smart transportation new technology. He has hosted or participated in many research projects in the transportation field such as the National Natural Science Foundations of China, provincial and ministerial level, and local cooperation in recent years. He has published more than 70 journal papers and won 3 provincial and ministerial science and technology awards.

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	CHEN Wenhua
	HUANG Zhiyi

Cite this article:

CHEN Wenhua,HUANG Zhiyi. Effect of Aggregates and Fiber Contents on Mechanical Properties and Microstructure of Light Weight Toughness Cement-based Composites (LTCC)[J]. Materials Reports, 2020, 34(18): 18049-18055.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19100069 OR http://www.mater-rep.com/EN/Y2020/V34/I18/18049

1 Iman A, Payam S, Zahiruddin F. Journal of Building Engineering, 2018, 20, 81.
2 Ahmed W, Khushnood R, Memon S, at al. Journal of Cleaner Production, 2018, 184, 1016.
3 Aslam M, Shafigh P, Jumaat M, et al. Journal of Cleaner Production, 2016, 119, 108.
4 ACI Committee. Guide for structural lightweight-aggregate concrete,Far-mington Hills, American Concrete Institute, 2014.
5 Fan Jinzhong. Bulletin of the Chinese Ceramic Society, 2005(5), 73(in Chinese).
范锦忠. 硅酸盐通报, 2005(5), 73.
6 Ali M, Maslehuddin M, Shameem M, et al. Construction and Building Materials, 2018, 164, 739.
7 Montgomery D, Diamond S. Cement & Concrete Research, 1984, 14, 767.
8 Blanco F, García P, Mateos P, et al. Cement & Concrete Research, 2000, 30, 1715.
9 Huang X, Ranade R, Zhang Q, et al. Construction and Building Mate-rials, 2013, 48, 954.
10 Du H. Construction and Building Materials, 2019, 199, 696.
11 Liu X, Chia K, Zhang M. Cement & Concrete Composites, 2010, 32, 757.
12 Zhang Zuxue, Zou Yun, Zhao Taogan, et al. Bulletin of the Chinese Ceramic Society, 2019, 38(7), 2228(in Chinese).
张祖雪,邹昀,赵桃干,等. 硅酸盐通报, 2019, 38(7), 2228.
13 Zhu Han, Yang Jiantao, Yu Yong. Bulletin of the Chinese Ceramic Society, 2015, 34(12), 3617(in Chinese).
朱涵,杨建涛,于泳.硅酸盐通报, 2015, 34(12), 3617.
14 Tong Yu, Zhang Junnan, Tian Xin, et al. Bulletin of the Chinese Ceramic Society, 2015, 34(4), 1066(in Chinese).
佟钰,张君男,田鑫,等. 硅酸盐通报, 2015, 34(4), 1066.
15 JSCE. Recommendations for design and construction of high performance fiber reinforced cement composites with multiple fine cracks, Japan Society of Civil Engineers, Tokyo, 2008.
16 ASTM 1585-04. Standard test method for measurement of rate of absorption of water by hydraulic-cement concretes, ASTM International, West Conshohocken, 2011.
17 Zhang Wei, Yin Chenglong, Huang Zhiyi. Materials Review, 2018, 32(S2), 498(in Chinese).
张伟,殷成龙,黄志义.材料导报, 2018, 32(专辑32), 498.
18 Zhang Wei, Yin Chenglong, Huang Zhiyi. Journal of Building Materials, 2019, 22(2), 227(in Chinese).
张伟,殷成龙,黄志义.建筑材料学报, 2019, 22(2), 227.
19 Luo S, Liu M, Yang L, et al. Construction and Building Materials, 2019, 195, 305.
20 Hu Shuguang, Wang Fazhou, Ding Qingjun. Journal of the Chinese Ceramic Society, 2005(6), 713(in Chinese).
胡曙光,王发洲,丁庆军. 硅酸盐学报, 2005(6), 713.
21 Lu M, Xiao H, Liu M, et al. Cement and Concrete Composites, 2018, 91, 21.