Tensile and compressive properties and crack distribution of polyethylene fiber reinforced high ductile alkali-activated slag composites

被引：0

作者：

Kan L. ^{[1
]}

Pang C. ^{[1
]}

Wang F. ^{[1
]}

Xue J. ^{[1
]}

Zhao S. ^{[1
]}

Liu W. ^{[1
]}

Zhao Y. ^{[2
]}

机构：

[1] School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai

[2] Shanghai Baosteel New Building Materials Technology Limited Company, Shanghai

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 12期

关键词：

Alkali-activated slag; Curing ages; Digital image correlation (DIC); Fiber reinforced; High ductility; Tensile and compressive properties;

D O I：

10.13801/j.cnki.fhclxb.20210302.003

中图分类号：

学科分类号：

摘要：

Activated by alkaline activator, polyethylene (PE) fiber reinforced high ductile alkali-activated slag composites were prepared using slag as the main raw material and fly ash as auxiliary material. The tensile and compressive properties of the composites under different curing ages (1 day, 3 days, 7 days, 28 days, 56 days and 120 days) were studied through uniaxial tensile and compressive tests, and the cracks were characterized by a digital image correlation technology (DIC). The results show that the alkali-activated slag owns a good high ductility and early strength. The strength value at 7 days can reach more than 84% of the ultimate strengths (the ultimate tensile and compressive strengths are 5.05 MPa and 91.24 MPa, respectively), 5.74% for the tensile strain, and the multi-cracking is basically saturated. After 28 days, the tensile and compressive properties become stable (tensile and compressive strengths and tensile strain keep around 6 MPa, 100 MPa and 6%, respectively). DIC analysis cloud maps visually describe the formation and propagation of cracks, which can be applied to predict reliably the direction and location of cracks to a certain extent. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：4305 / 4312

页数：7

共 21 条

[1] PROVIS J L, PALOMO A, SHI C., Advances in understanding alkali-activated materials, Cement and Concrete Research, 78, pp. 110-125, (2015)
[2] CHEN Shuo, WANG Lijiu, Mechanical properties and reaction products of reactive MgO modified circulating fluidized bed combustion slag-silica fume composites, Acta Materiae Compositae Sinica, 35, 5, pp. 1288-1297, (2018)
[3] LING Y, WANG K., Effect of slag on the mechanical properties and bond strength of fly ash-based engineered geopolymer composites, Composites Part B: Engineering, 164, pp. 747-757, (2019)
[4] KOSHY N, DONDORB K., Synthesis and characterization of geopolymers derived from coal gangue, fly ash and red mud, Construction and Building Materials, 206, pp. 287-296, (2019)
[5] SCRIVENER K L, JOHN V M, GARTNER E M., Eco-efficient cements: Potential economically viable solutions for a low-CO<sub>2</sub> cement-based materials industry, Cement and Concrete Research, 114, pp. 2-26, (2018)
[6] CAO Mingli, XU Ling, ZHANG Cong, Review on micromechanical design, performance and development tendency of engineered cementitious composite, Journal of the Chinese Ceramic Society, 43, 5, pp. 632-642, (2015)
[7] KAN Lili, DUAN Beibei, YAN Tao, Self-healing characteristics of engineered geopolymer composites incorporating metakaolin and fly ash under different environments, Acta Materiae Compositae Sinica, 35, 10, pp. 2841-2850, (2018)
[8] ZHANG Z G, ZHANG Q, LI V C., Multiple-scale investigations on self-healing induced mechanical property recovery of ECC, Cement and Concrete Composites, 103, pp. 293-302, (2019)
[9] LI V C., On engineered cementitious composites (ECC)-A review of the material and its applications, Advanced Concrete Technology, 3, pp. 215-230, (2003)
[10] ZHOU J, QIAN S Z, YE G, Et al., Improved fiber distribution and mechanical properties of engineered cementitious composites by adjusting the mixing sequence, Cement and Concrete Composites, 34, 3, pp. 342-348, (2012)

← 1 2 3 →