Bleeding characteristics of high consistency heavyweight concrete mixtures

Küçük Resim Yok

Tarih

2019

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Elsevier Ltd

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Bleeding, a type of static segregation derives from density difference of concrete ingredients in fresh state. Due to having this difference higher than normal weight counterparts, heavyweight concrete is more susceptible to bleeding, thus, this type of concrete is commonly produced in low slump values. In order to give a response to advances and demands in concrete technology, heavyweight concrete mixtures with high slump values were designed at various mixture characteristics, and their bleeding characteristics were researched in the study. For this purpose, totally, thirty-five concrete mixtures with ?150 mm slump values were produced by using common cement replacement materials (silica fume and fly ash), viscosity modifier, and various water/binder ratios at two binder dosages. The mixtures showed excessive bleeding capacities ranged from 0 to 11.7% and bleeding rates ranged from 0 to 5.1 kg/m2/h. Silica fume was found as the most effective admixture for reducing or elimination of the bleeding. Bleeding time generally shorten at high binder content and at high water/binder ratio. It was observed that the bleeding adversely affects the hardened characteristics of heavyweight concrete mixtures. © 2018 Elsevier Ltd

Açıklama

Anahtar Kelimeler

Bleeding, Heavyweight concrete, High consistency, Mix design parameters, Binders, Fly ash, Mixtures, Silica fume, Bleeding, Cement replacement materials, Concrete technology, Heavyweight concretes, High consistency, Mix designs, Viscosity modifiers, Water/binder ratios, Concrete mixtures, Bleeding, Heavyweight concrete, High consistency, Mix design parameters, Binders, Fly ash, Mixtures, Silica fume, Bleeding, Cement replacement materials, Concrete technology, Heavyweight concretes, High consistency, Mix designs, Viscosity modifiers, Water/binder ratios, Concrete mixtures

Kaynak

Construction and Building Materials

WoS Q Değeri

Q1

Scopus Q Değeri

Q1

Cilt

194

Sayı

Künye