Frost Resistance and Plastic Cracking of Road Cement Concrete with Mineral Admixture
Crack and frost resistance are factors affecting performance of road concrete. In order to compare the effects of mineral admixtures such as fly ash, silica fume, and slag powder on the plastic cracking and frost resistance of concrete; the cracking time, number and area of cracks, Cl− diffusion coefficient, and relative dynamic modulus of concrete was determined by various methods. The results show mineral admixture can accelerate or delay the occurrence time of cracks. The amount is positively correlated with the average cracking area, but there is no significant correlation with the number of cracks. Mineral admixtures can effectively reduce Cl− diffusion coefficient. However, after exceeding 20%, the rate of decrease slows. The effect of mineral admixtures on improving the frost resistance durability of concrete has become more apparent in the late stage of freezing and thawing. With the appropriate dosage, the three admixtures can achieve similar effects.
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Supplemental Notes:
- © 2020 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Zhang, Yancong
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Conference:
- 20th COTA International Conference of Transportation Professionals
- Location: Xi’an , China
- Date: 2020-8-14 to 2020-8-16
- Publication Date: 2020
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 1388-1396
- Monograph Title: CICTP 2020: Transportation Evolution Impacting Future Mobility
Subject/Index Terms
- TRT Terms: Admixtures; Cracking; Fly ash; Frost protection; Minerals; Silica fume; Slag
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01767416
- Record Type: Publication
- ISBN: 9780784483053
- Files: TRIS, ASCE
- Created Date: Mar 22 2021 10:34AM