A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Superplasticized Concretes for Rehabilitation of Bridge Decks and Highway Pavements
The object of this research was to develop guidelines for assuring the trouble-free placement of tough, high-strength, high density, durable concrete for bridge deck construction through the use of superplasticizers and steel fibers. The study was made in two phases. The first investigated the basic properties of concrete made with superplasticizers through the use of experimental mixtures conforming to the requirements dictated by statistically valid factorial designs, so that analysis of variance could be used in the evaluation. The second phase extended the findings into an evaluation of superplasticized concretes containing steel fibers. This report describes the first phase study of the statistical evaluation of superplasticized concrete properties. Two mixes, one with medium workability and high cement content suitable for bridge deck replacement and another with high workability suitable for structural and pavement concrete were selected for intensive study. For these mixes, properties of the fresh concrete (slump, vebe time, flow table spread, air content, initial and final setting times) are reported. The effects of retempering are described. The influence of three types of cements on the properties of plastic and hardened concrete is explained. Complete results of the following tests are presented: compressive strength, tensile strength, flexural strength, static modulus of elasticity, dynamic modulus of elasticity, pulse velocity and dry unit weight at 1, 3, 28 and 90 days curing. The selected concretes had high durability and satisfactory resistance against deicer scaling.
Superplasticized Concretes for Rehabilitation of Bridge Decks and Highway Pavements
The object of this research was to develop guidelines for assuring the trouble-free placement of tough, high-strength, high density, durable concrete for bridge deck construction through the use of superplasticizers and steel fibers. The study was made in two phases. The first investigated the basic properties of concrete made with superplasticizers through the use of experimental mixtures conforming to the requirements dictated by statistically valid factorial designs, so that analysis of variance could be used in the evaluation. The second phase extended the findings into an evaluation of superplasticized concretes containing steel fibers. This report describes the first phase study of the statistical evaluation of superplasticized concrete properties. Two mixes, one with medium workability and high cement content suitable for bridge deck replacement and another with high workability suitable for structural and pavement concrete were selected for intensive study. For these mixes, properties of the fresh concrete (slump, vebe time, flow table spread, air content, initial and final setting times) are reported. The effects of retempering are described. The influence of three types of cements on the properties of plastic and hardened concrete is explained. Complete results of the following tests are presented: compressive strength, tensile strength, flexural strength, static modulus of elasticity, dynamic modulus of elasticity, pulse velocity and dry unit weight at 1, 3, 28 and 90 days curing. The selected concretes had high durability and satisfactory resistance against deicer scaling.
Superplasticized Concretes for Rehabilitation of Bridge Decks and Highway Pavements
V. Ramakrishnan (author) / W. V. Coyle (author)
1981
284 pages
Report
No indication
English
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