01628575

Component

https://doi.org/10.3141/2629-10

Concrete cracking, high permeability, and leaking joints allow harmful solutions to intrude into concrete, resulting in concrete deterioration and corrosion of reinforcement. The development of durable concrete with limited cracking is a potential solution for extending the service life of concrete structures. Optimal design of very early strength (VES) durable materials will facilitate rapid and effective repairs and thus reduce traffic interruptions and maintenance work. The purpose of this study was to develop low-cracking durable materials that could achieve a very early compressive strength of 3,000 pounds per square inch within 10 h. Various proportions of silica fume, fly ash, steel fibers, and polypropylene fibers were used to evaluate concrete durability and postcracking performance. In addition, toughness, residual strength, permeability of cracked concrete, and fiber distribution were examined. VES durable concretes could be achieved with proper attention to mixture components (amounts of portland cement and accelerating admixtures), proportions (water–cementitious material ratio), and fresh concrete and curing temperatures. Permeability values indicated that minor increases in crack width, greater than 0.1 mm, greatly increased infiltration of solutions. Adding fibers could facilitate control of crack width. An investigation of fiber distribution showed preferential alignment and some clumping of fibers in the specimens and highlighted the need for sufficient mixing and proper sequencing of the addition of concrete ingredients into the mixer to ensure a uniform random fiber distribution. Results indicated that VES and durable fiber-reinforced concrete materials could be developed to improve the condition of existing and new structures and facilitate rapid, effective repairs and construction.

01632439

17-03129

English

pp 73–82

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441827

Digital/other

Figures (8) ; Photos; References (30) ; Tables (4)

Compressive strength; Durability; Fiber reinforced concrete; Fly ash; High performance concrete; Permeability; Polypropylene; Residual strength; Silica fume; Steel fibers; Toughness

Fiber distribution; Very early strength concrete

Bridges and other structures; Highways; Materials

PRP, TRIS, TRB, ATRI

Dec 8 2016 11:10AM

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• Role of Ground Glass Fiber as a Pozzolan in Portland Cement Concrete
• Should Minimum Cementitious Contents for Concrete Be Specified?
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