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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Engineered cementitious composites (ECCs) are potentially useful structural reinforcement and repair materials. However, owing to their high costs and carbon emissions, they are not used extensively. To control these carbon emissions and costs, recycled fly ash cenospheres (FACs) and high-strength polyethylene (PE) fibers are used here to explore the possibility of developing green lightweight ECCs (GLECCs). A series of experiments was conducted to test the physical and mechanical properties of the developed GLECC and to evaluate the possibility of developing an GLECC. The crack width development of the GLECC was also analyzed using the digital image correlation method. The experimental results indicate the following: (1) The increase in FAC content and the decrease in PE content worsened the performance of GLECCs, but the resulting GLECCs still had significant strain-hardening properties; (2) The performance and costs of GLECCs can be balanced by adjusting the amount of FAC and PE. The maximum amount of FACs attainable is 0.45 (FAC/binder), and the required amount of PE fibers can be reduced to 1%. As a result, the cost was reduced by 40% and the carbon emission was reduced by 36%, while the compressive strength was greater than 30 MPa, the tensile strength was greater than 3.5 MPa, and the tensile strain was nearly 3%. (3) The width of the crack was positively correlated with the FAC content and negatively correlated with the fiber content. In the 0.8% strain range, the average crack width can be controlled to within 100 μm and the maximum crack width can be controlled to within 150 μm, with the performance still meeting the requirements of many applications.

Details

Title
Green-Engineered Cementitious Composite Production with High-Strength Synthetic Fiber and Aggregate Replacement
Author
Fu, Chaoshu 1 ; Chen, Mingzhao 1 ; Guo, Rongxin 1   VIAFID ORCID Logo  ; Qi, Rongqing 2 

 Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650504, China; [email protected] (C.F.); [email protected] (M.C.); [email protected] (R.Q.); Yunnan Key Laboratory of Disaster Reduction in Civil Engineering, Kunming 650504, China 
 Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650504, China; [email protected] (C.F.); [email protected] (M.C.); [email protected] (R.Q.); Yunnan Key Laboratory of Disaster Reduction in Civil Engineering, Kunming 650504, China; College of Civil Engineering, Southwest Forestry University, Kunming 650224, China 
First page
3047
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
19961944
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2663066630
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.