› › Polymer Modified Concretes In Bridge Deck Overlay Systems

Polymer-Modified Concretes in Bridge Deck Overlay Systems

Author : JM. Judy

Publisher :

Page : 6 pages

File Size : 23,74 MB

Release : 1977

Category : Bridge decks

ISBN :

Get eBook

Book Description

Premature failure of portland cement concrete bridge decks is of national concern, particularly in those areas where chloride residues accumulate in the concrete from winter deicing operations. West Virginia's research and field usage indicates that the application of a relatively thin (1 to 2-in.) overlay of portland cement concrete or mortar containing a latex modifier may result in a significant increase in the useful life of bridge decks. Eighteen structures, including both new construction and renovation of existing decks, have received the latex-modified concrete overlay. Results to date have been most encouraging.



Long-term Performance of Polymer Concrete for Bridge Decks

Author : David W. Fowler

Publisher : Transportation Research Board

Page : 75 pages

File Size : 40,87 MB

Release : 2011

Category : Technology & Engineering

ISBN : 0309143543

Get eBook

Book Description

TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 423: Long-Term Performance of Polymer Concrete for Bridge Decks addresses a number of topics related to thin polymer overlays (TPOs). Those topics include previous research, specifications, and procedures on TPOs; performance of TPOs based on field applications; the primary factors that influence TPO performance; current construction guidelines for TPOs related to surface preparation, mixing and placement, consolidation, finishing, and curing; repair procedures; factors that influence the performance of overlays, including life-cycle cost, benefits and costs, bridge deck condition, service life extension, and performance; and successes and failures of TPOs, including reasons for both.





Concrete Bridge Deck Performance

Author : H. G. Russell

Publisher : Transportation Research Board

Page : 188 pages

File Size : 43,9 MB

Release : 2004

Category : Bridges

ISBN : 0309070112

Get eBook

Book Description

At head of title: National Cooperative Highway Research Program.



Thin Polymer Bridge Deck Overlays

Author : DeWayne L. Wilson

Publisher :

Page : pages

File Size : 17,22 MB

Release : 1995

Category : Bridges

ISBN :

Get eBook

Book Description

This report summarizes the Washington State Department of Transportation's (WSDOT's) 10 years of experience with "epoxy" and "methyl methacrylate" (MMA) thin polymer bridge deck overlays. WSDOT uses a modified concrete as its primary type of bridge deck overlay, but in some cases a bridge's physical characteristics, such as lightweight design or narrow roadway width, will not allow using a modified concrete overlay. Thin polymer overlays provide an alternative. Thin polymer overlays offer more rapid construction, curing in 4 to 8 hours compared to 42 hours for a modified concrete overlay. Thin polymer overlays are lightweight (due to their 3/8 in. thickness, approximately 5 lb/SF versus 19 lb/SF for a modified concrete overlay and are generally less labor intensive and require less specialized equipment than a modified concrete overlay.



Polymer-modified Hydraulic-cement Mixtures

Author : Louis A. Kuhlmann

Publisher : ASTM International

Page : 162 pages

File Size : 37,81 MB

Release : 1993

Category : Latex

ISBN : 0803114907

Get eBook

Book Description

A dozen papers from a June 1992 symposium in Louisville, Kentucky review the current use of organic polymers dispersed in water and formulated to add to portland cement. One sets out the status of ASTM's forthcoming specification and test methods. Others discuss such aspects as solid grade acrylic c





Environmental Influence on the Bond Between a Polymer Concrete Overlay and an Aluminum Substrate

Author : David W. Mokarem

Publisher :

Page : 29 pages

File Size : 27,96 MB

Release : 2000

Category : Concrete bridges

ISBN :

Get eBook

Book Description

Chloride-ion-induced corrosion of reinforcing steel in concrete bridge decks has become a major problem in the United States. Latex-modified concrete, low-slump dense concrete, and hot-mix asphalt membrane overlays are some of the most used rehabilitation methods. Epoxy-coated reinforcing steel was developed and promoted as a long-term corrosion protection method by the Federal Highway Administration. However, recent evidence has suggested that epoxy-coated reinforcing steel will not provide adequate long-term corrosion protection. The Reynolds Metals Company developed an aluminum bridge deck system as a proposed alternative to conventional reinforced steel bridge deck systems. The deck consists of a polymer concrete overlay and an aluminum substrate. The purpose of this investigation was to evaluate the bond durability between the overlay and the aluminum substrate after specimens were conditioned in various temperature and humidity conditions. The different environmental conditionings all had a significant effect on the bond durability. Specimens conditioned at 30°C, 45 °C, and 60°C at 98 percent relative humidity all showed a decrease in interfacial bond strength after conditioning. There was also a decrease in the interfacial bond strength for the specimens conditioned in freezing and thawing cycles and specimens conditioned in a salt water soak. The only exposure condition that increased the bond strength was drying the specimens continuously in an oven at 60°C.



Handbook of Polymer-Modified Concrete and Mortars

Author : Yoshihiko Ohama

Publisher : William Andrew

Page : 247 pages

File Size : 13,55 MB

Release : 1995-12-31

Category : Technology & Engineering

ISBN : 0815517696

Get eBook

Book Description

Mortar and concrete made with portland cement has been a popular construction material in the world for the past 170 years or more. However, cement mortar and concrete have some disadvantages such as delayed hardening, low tensile strength, large drying shrinkage and low chemical resistance. To reduce these disadvantages, polymers have been utilized as an additive. Polymer-modified or polymer cement mortar (PCM) and concrete (PCC) are the materials which are made by partially replacing the cement hydrate binders of conventional cement mortar or concrete, with polymers. This book deals with the principles of polymer modification for cement composites, the process technology, properties and applications of the polymer-modified mortar and concrete, and special polymer-modified systems such as M DF cement, antiwashout underwater concrete, polymer-ferrocement, and artificial I wood. The polymeric admixtures or cement modifiers include latexes or emulsions, redispersible polymer powders, water-soluble polymers, liquid resins and monomers. This book describes the current knowledge and information of polymer-modified mortars and concretes, and discusses or reviews the following items in detail: 1. Principles of polymer modification for cement composites. 2. Process technology of polymer-modified mortars and concretes. 3. Properties of polymer-modified mortars and concretes. 4. Applications of polymer-modified mortars and concretes. 5. Special polymer-modified systems such as MDF cements, antiwashout underwater concretes, polymer-ferrocements, and artificial woods.



Polymer Concrete Overlays- Flexogrid

Author : Timothy L. Ramirez

Publisher :

Page : 70 pages

File Size : 32,60 MB

Release : 1989

Category : Concrete bridges

ISBN :

Get eBook

Book Description

The purpose of this study is to evaluate the application of FLEXOGRID, a modified epoxy resin, to a concrete bridge deck. The FLEXOGRID is designed to impart a thin, fast curing, water impermeable protective overlay to the deck. The FLEXOGRID is 1/4 inch thick consisting of 2 applications of an epoxy broadcasted with a hard aggregate. The FLEXOGRID was easy to apply after the bridge deck delaminations were repaired and the entire deck was shotblasted. Only minor application problems occurred which can be corrected for future applications.