Shrinkage Effects of Using Fly Ash instead of Fine Aggregate in Concrete Mixtures
Joint Authors
Mao, Mingjie
Zhang, Dongsheng
Yang, Qiuning
Han, Pengfei
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-09
Country of Publication
Egypt
No. of Pages
11
Abstract EN
China is the world’s largest emitter of fly ash, an industrial by-product of coal combustion.
Motivated towards greener development, China’s engineering industries must determine how to effectively utilize this by-product, while ensuring environmental and public safety protections.
This study investigated the use of fly ash instead of fine aggregate in concrete mixtures with a focus on concrete shrinkage.
A series of experiments were performed in which fly ash substitution levels, water-binder ratios, and ambient humidities were each respectively and exclusively varied to determine changes in the concrete’s drying and autogenous shrinkages.
Experimental results indicated that the substitution of fly ash consistently decreased the drying shrinkage relative to ordinary concrete; a substitution level of 25% optimally reduced the drying shrinkage by 20.81%.
A substitution level of 15% decreased the autogenous shrinkage relative to ordinary concrete, whereas higher levels (25, 35, and 45%) increased it.
Ambient humidities also affected the concrete shrinkage, but the water-to-binder ratio effects were negligible.
Drying shrinkage largely occurred before 28 d, whereas autogenous shrinkage continued after 28 d.
Based on these experimental results, we evaluated common theoretical shrinkage models and subsequently developed a modified shrinkage model for application to concrete containing fly ash as fine aggregate.
American Psychological Association (APA)
Zhang, Dongsheng& Han, Pengfei& Yang, Qiuning& Mao, Mingjie. 2020. Shrinkage Effects of Using Fly Ash instead of Fine Aggregate in Concrete Mixtures. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1127967
Modern Language Association (MLA)
Zhang, Dongsheng…[et al.]. Shrinkage Effects of Using Fly Ash instead of Fine Aggregate in Concrete Mixtures. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1127967
American Medical Association (AMA)
Zhang, Dongsheng& Han, Pengfei& Yang, Qiuning& Mao, Mingjie. Shrinkage Effects of Using Fly Ash instead of Fine Aggregate in Concrete Mixtures. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1127967
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1127967