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Twenty-Year Performance of Latex-Modified Concrete Overlays

Twenty-Year Performance of Latex-Modified Concrete Overlays
Author: MM. Sprinkel
Publisher:
Total Pages: 14
Release: 1993
Genre: Bridge
ISBN:

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Fourteen bridge decks with latex-modified concrete (LMC) overlays ranging in age from two to twenty years and two overlays without latex were studied. The high quality portland cement concrete overlays without latex showed greater negative increases in half-cell potentials, greater increases in chloride content, and a higher percentage of higher rates of corrosion than the LMC overlays. Also, for these two bridges, higher shear and tensile rupture strengths were obtained at the bond interface with LMC than with concrete without latex. Higher rupture strengths were not obtained on the other bridges because of the low strength of the scarified surface of the base concrete. The permeability, half-cell, chloride, rate-of-corrosion, and bond, strength data indicate that the overlays are performing satisfactorily. Also, LMC overlays placed on decks with less than 2 lb/yd3 (1.2 kg/m3) of chloride ion at the rebar can be expected to have a service life in excess of twenty years.


Twenty-five Year Performance History of Latex-modified Concrete Overlays on New Bridge Decks in Wichita, Kansas

Twenty-five Year Performance History of Latex-modified Concrete Overlays on New Bridge Decks in Wichita, Kansas
Author:
Publisher:
Total Pages: 24
Release: 2009
Genre: Bridges
ISBN:

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In 1976 the FHWA approved federal aid funding for experimental installations of corrosion protection for reinforcing steel in new and existing concrete bridge decks. Five new bridges constructed in 1976 and 1977 in Sedgwick County were selected for experimental latex-modified polymer overlay installations and subsequent monitoring. The Concrete Research Section conducted annual or biannual surveys of delamination, corrosion potential and cracking from 1977 to 2002. All five overlays were still in service as of 2007. A comparison of service life with initial cost shows that the latex-modified concrete overlays were cost effective corrosion protection for Kansas bridges.


Polymer-modified Hydraulic-cement Mixtures

Polymer-modified Hydraulic-cement Mixtures
Author: Louis A. Kuhlmann
Publisher: ASTM International
Total Pages: 162
Release: 1993
Genre: Latex
ISBN: 0803114907

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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


Concrete Admixtures Handbook, 2nd Ed.

Concrete Admixtures Handbook, 2nd Ed.
Author: V.S. Ramachandran
Publisher: William Andrew
Total Pages: 1183
Release: 1996-12-31
Genre: Technology & Engineering
ISBN: 0815516541

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Since the publication of the first edition ten years ago, significant developments have occurred in the use of admixtures in concrete. Eight new chapters and a full update of the preceding ten chapters bring this book up to date; reflecting the relative advances made in the science and technology of different groups of admixtures. The increased role and development of admixtures in concrete technology is evidenced by a number of conferences, publications, and novel admixtures available in the market place. These developments in the field caused the modification of many chapters in the first edition in order to reflect the advances. Although individual chapters refer to standards and specifications of admixtures, those only interested in the standards or techniques used in investigating admixtures will find the second chapter (Research Technologies, Standards, and Specifications) useful. Admixtures are not as inert as may be presumed. They may chemically interact with the constituents of concrete and affect the properties of the fresh and hardened concrete and its durability. The third chapter deals with these aspects. It was important to devote a chapter to recent attempts in developing new admixtures.


Latex-modified Concretes and Mortars

Latex-modified Concretes and Mortars
Author: V. Ramakrishnan
Publisher: Transportation Research Board
Total Pages: 76
Release: 1992
Genre: Technology & Engineering
ISBN: 9780309053037

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This synthesis wil be of interest to materials engineers, construction engineers, maintenance engineers, pavement contractors and others interested in the use of latex-modified mortars (LMM) and concretes ( LMC). Information is provided on material properties of various LMM and LMC, as well as current construction practices used for LMM and LMC. Potential applications for LMM and LMC are also included. The use of innovative modified portland cement mortars and concretes for construction and maintenance applications is growing. This report of the Transportation Research Board describes the current state of the practice with respect to the use of latex-modified portland cement concretes and mortars. The extent of use of each material (including case histories), based on results of surveys of state highway agencies and a review of the literature, is summarized.


Fundamentals of High-Performance Concrete

Fundamentals of High-Performance Concrete
Author: Edward G. Nawy
Publisher: John Wiley & Sons
Total Pages: 468
Release: 2000-11-16
Genre: Technology & Engineering
ISBN: 9780471385554

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High performance concrete is a key element in virtually all-large construction projects, from tall office and residential buildings to bridges, tunnels and roadways. The fully updated Second Edition helps professionals to understand the performance capabilities of these construction materials when selecting the type of concrete to use for particular projects. The author is one of the worlds acknowledged experts on high performance concrete.


Concrete Bridge Deck Performance

Concrete Bridge Deck Performance
Author: H. G. Russell
Publisher: Transportation Research Board
Total Pages: 188
Release: 2004
Genre: Bridges
ISBN: 0309070112

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At head of title: National Cooperative Highway Research Program.