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Relates how two construction projects in New York City achieved quality performance for their concrete elements with the addition of alternative materials in the mix. Use of metakaolin and MetaMax HRM, an ultra-fine pozzolonic concrete additive for the concrete stair of the Museum of Modern Art in New York City's Soho District; Use of glass fiber reinforced concrete and precast concrete in the restoration project of Alwyn Court condominium in New York City's Upper West Side; Effect of the mixture of terra-cotta and the MetaMax-modified concrete for the restoration of the condominium's facade.

The article discusses the application of new concrete additive to aid concrete contractors avoid placing and finishing challenges in the U.S. It highlights the joint meeting of the Ohio Ready Mixed Concrete Association (ORMCA) and the American Society of Concrete Contractors (ASCC). The new additive called Elemix is a product consisting of lightweight synthetic particles (LSP) manufactured by SYNTHEON Inc.

The article features Durapoz F from Ash Grove Cement Co. which is designed to enhance reactivity and overcome setting time and strength issues of concretes in the U.S. The Durapoz is an enhancement of the Class F fly ash product and used by construction authorities as a replacement for cement to test aggregate reactivity. Moreover, it is also used to test for concrete permeability and Ash Grove Technical center shows that concrete mixtures produced using Durapoz has very good test values.

Focuses on the use of coal fly ash and ground-granulated blast-furnace slag as green concrete mineral admixtures for construction projects in the U.S. Percentage of all fly ash produced yearly which is used for various construction-related applications; Percentages of use as portland cement substitutes; Green advantages to using both materials.

The article reports on research on admixtures that can satisfy the U.S. Army's operational requirement for rapid setting concrete in cold weather environments.

Focuses on the acceptance of polycarboxylates as dispersants in admixtures in a slew of performance improvements in the U.S. Claims of admixture makers; Statement of L. Michael Shydlowski, CEO of Degussa Admixtures, the former MasterBuilders unit of the German chemical conglomerate; Significance of introducing polycarboxylate chemistry.

The article reports that NASA structural engineers want to reduce potential corrosion which can damage the rebar in important concrete structures located in the immediate vicinity of a launchpad. As a number of space shuttles are launched yearly from the site, the structures are exposed to highly corrosive exhaust fumes from the shuttles' engines. Engineers from Cortec Corp., manufacturer of anticorrosive concrete admixtures and surface treatments, performed tests designed to determine corrosion rates.

The article focuses on the Hoover Dam Bypass Tour to be held during the 3rd Annual World of Concrete Editorial Tour. Participants will see a unique view of the Colorado River Bridge being built about 1500 feet downstream of the dam. It states that sponsor Sika Corp. will provide information about the concrete admixtures used in the project.

Focuses on a fast pavement replacement done by the West Virginia Parkway System on portions of the West Virginia Turnpike. Problems involved in the replacement plan; Use of Degussa Admixtures' 4X4 Concrete in the project; Components of the 4X4 Concrete.

Discusses the benefits of slag cement in concrete to concrete construction, according to the Slag Cement Association. Composition of a study conducted by Construction Technology Laboratories Inc. in Illinois; Recognition of the use of slag cement as a sustainable construction technique by the U.S. Green Building Council's Leadership in Energy and Environmental Design Green Building Rating System.

Discusses the needs for recycling earthquake-produced concrete debris for using with cement to make concrete in the U.S. Advantages of using the recycled concrete; Percentage of return on investment using debris; Problem in using the concrete debris with cement.

Reports on concrete innovations focused on creating new mixes in the U.S. Use of supplementary cementitious materials (SCM) in redirecting industrial byproducts from landfills; Development of a concrete mixture with greater durability, strength and finishability; Classification of SCMs into four different kinds.

Forecasts the increase of the demand for the construction chemicals industry products in the United States in 2001. Sales performance of concrete additives producers W.R. Grace and Master Builders; Market size of the industry.

Focuses on the growing rate of the United States (US) market for concrete admixtures. Uses of additives; Four producers that dominated the market; US admixture sales in 1997; Areas focused by leading producers of additives.

Reports on the growing popularity of concrete additives in the construction market. Sales of additive producers including Grace Construction Products as of 1995; Benefits of concrete additives.

Reports on United States state transportation departments' review of a metakaolin admixture which was claimed to increase concrete life by up to 125 years. Forecast of competition with silica fume; Features of the admixture.

The article discusses research being conducted by the U.S. National Science Foundation (NSF) on concrete columns built with glass fibre-reinforced plastic (GFRP) bars. Aspects of the behavior of such columns are enumerated regarding GFRP-concrete compatibility, column capacity, reinforcing bar quality, and compression load design.

The article focuses on the use of fly ash in concrete application in the U.S. It is described as the particulate matter gathered by pollution-control equipment from stacks of coal-burning power plants. It states that it makes concrete more durable and can be used to reduce its environmental mark. It notes that its use in the country is governed by the ASTM Standard C618 which forbids the use of fly ash in excessive residual carbon. The distinction between Class F and Class C fly ash is provided.