01875302

Component

https://doi.org/10.1177/03611981221150400

Mass concrete is prone to thermal cracking, deleterious chemical reactions, and ultimate strength reduction caused by a high temperature rise. Defining mass concrete has been difficult since many factors affect the thermal behavior and the distress formation. Mass concrete is usually reinforced and may have geometric constraints that require concretes with high workability, as with self-consolidating concrete. For high workability and strength, high amounts of cementitious material are used for stability and low water–cementitious material ratios. Such amounts generally cause high water and paste contents that lead to cracking because of moisture loss and thermal contraction. In this study, a practical and useful definition of mass concrete was explored. Concretes with low cementitious material contents and high workability were investigated. To minimize the total cementitious material and paste contents, optimum aggregate gradations were considered. To achieve and maintain high workability during construction, a combination of admixtures was used that included high-range water reducing, workability-retaining, and viscosity-modifying admixtures. Laboratory testing of concretes with reduced cementitious material contents including high amounts of the supplementary cementitious materials and a combination of admixtures showed that concretes with a decreased temperature rise, high workability, and adequate strength can be obtained.

H. Celik Ozyildirim https://orcid.org/0000-0001-6969-0554© National Academy of Sciences: Transportation Research Board 2023.

English

0000-0001-6969-0554

0000-0002-8073-2660

0000-0002-8963-117X

pp 827-836

2023-6

Transportation Research Record: Journal of the Transportation Research Board

Web

References (22)

Admixtures; Laboratory tests; Mass concrete; Temperature endurance tests; Workability

Highways; Materials; Pavements

TRIS, TRB, ATRI

Mar 6 2023 3:00PM