Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Durability and Physical Properties of Steel Fiber Reinforced Concrete
The durability and physical properties of steel fiber reinforced concretes proportioned for pumpability criteria for tunnel liners are reported. The mix parameters include fiber contents of 0.9, 1.2 and 1.5 volume percent, maximum aggregate sizes of 3/8, 1/2, 3/4 and 1 in. (10, 13, 20 and 25 mm), and use of water reducers. Tests were performed at 28 d with type 1 cement concrete and between 1-1/2 h and 90 d with regulated-set cement concrete. Regulated-set cement concrete is found to lose nearly twice the strength as type 1 cement concrete for exposure to 660 F (350 C). Corrosion of steel fiber reinforcement is observed in cracked concrete with no apparent lower bound on crack size. The magnitude of the shrinkage of portland cement concretes proportioned for pumpability is related to the high paste contents required to fill the voids in the aggregate fiber array. An estimate of shrinkage can be made if the proportions of the mix and the curing are known.
Durability and Physical Properties of Steel Fiber Reinforced Concrete
The durability and physical properties of steel fiber reinforced concretes proportioned for pumpability criteria for tunnel liners are reported. The mix parameters include fiber contents of 0.9, 1.2 and 1.5 volume percent, maximum aggregate sizes of 3/8, 1/2, 3/4 and 1 in. (10, 13, 20 and 25 mm), and use of water reducers. Tests were performed at 28 d with type 1 cement concrete and between 1-1/2 h and 90 d with regulated-set cement concrete. Regulated-set cement concrete is found to lose nearly twice the strength as type 1 cement concrete for exposure to 660 F (350 C). Corrosion of steel fiber reinforcement is observed in cracked concrete with no apparent lower bound on crack size. The magnitude of the shrinkage of portland cement concretes proportioned for pumpability is related to the high paste contents required to fill the voids in the aggregate fiber array. An estimate of shrinkage can be made if the proportions of the mix and the curing are known.
Durability and Physical Properties of Steel Fiber Reinforced Concrete
G. T. Halvorsen (Autor:in) / C. E. Kesler (Autor:in) / A. R. Robinson (Autor:in) / J. A. Stout (Autor:in)
1976
75 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Reinforced concretes , Fibers , Reinforcing steels , Tunnel linings , Pumping , Concrete durability , Physical properties , Formulations , Design , Cracking(Fracturing) , Laboratory tests , Shrinkage , Steel wire , Fiber reinforced concretes
Durability of steel fiber reinforced self-compacting concrete
| Online Contents | 2015
Durability of steel fiber reinforced self-compacting concrete
| Elsevier | 2015