A Dynamic Segregation Test Method for Heavyweight Concrete: Density Variation Method
Küçük Resim Yok
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Soc Testing Materials
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Several segregation evaluation methods have been developed for concrete; however, none of them have been specially focused on heavyweight concrete, which has more of a tendency toward segregation because of differences in density of paste matrix to heavy aggregate. Thus, for heavyweight concrete, the segregation may be determined by measuring the difference density in a vertical direction. In this study, a simple reliable method, i.e., the density variation method, that considers the variation in vertical layers of the concrete is modeled to assess dynamic segregation of heavyweight concrete. In addition, 35 heavyweight concrete mixtures with high consistency were designed with various mixing parameters, and the results were compared with the model findings. The suggested test method was also compared with a conventional method (column segregation test by wet-sieving), and an equivalent segregation limit was determined. A strong linear relation (R-2 : 0.86) was found between the density variation method and column segregation test, and a segregation coefficient limit for segregation of heavyweight concrete is recommended as 1.7 %.
Açıklama
Anahtar Kelimeler
heavyweight concrete, dynamic stability, density variation method, column segregation test
Kaynak
Journal of Testing and Evaluation
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
48
Sayı
5
