March 1984 Table of Contents

Features Dry Shakes for Floors

Why should you apply a dry shake to a slab on grade? The answer is that the surface quality obtained by the usual practices will not be adequate for every purpose. Frequently the top surface is likely to be of lower strength and have the least sound materials in the slab. Read more

Features Quality Control to Achieve a Superflat Floor

Floors in narrow-aisle, high-rack warehouses must be extremely flat to permit adequate forklift speeds without the danger of material falling off pallets while being stored or retrieved. Read more

Features Getting Quality Assurance Right Now

Concrete quality can now be reliably evaluated in the field by determining the water-cement ratio of the mix and using that information to estimate the 28-day compressive and flexural strengths--all in less than 15 minutes. Read more

Features Underpass Installed Under an Operating Railroad with Minimum Shutdown

The city of Lawrenceburg, Indiana reports that it saved one million dollars by employing a unique system of constructing and installing a precast underpass beneath a railroad that previously divided the city. Read more

Features Concrete in the Railroad Roadbed

A traditional track structure supports rails on wood crossties partially embedded in a ballast of crushed stone or other aggregate, resting on a subgrade of varying load capacity. Read more

Features Precast Prestressed Concrete Sculpture

Adventure in Concrete is a monument to the achievements of Thomas W. and Arthur R. Anderson, dedicated by their fellow employees at Concrete Technology Corporation during Founders' Day ceremonies in August 1983. The 21-ton sculpture is made up of three vertically ribbed precast concrete elements with full height stainless steel plates on facing surfaces. Read more

Features Spirit of Black Hawk: Landmark Concrete Sculpture

Standing on Eagle's Nest Bluff 300 feet above the Rock River near Oregon, Illinois is the immense concrete figure of an Indian, his arms folded beneath a long blanket. Read more

Features Negotiated Work: Not for Everyone

In its strictest definition, the term negotiated work refers to the complete satisfaction of a client's construction needs. The contractor needs to be able to put together a construction package which meets the client's needs. In reality, most contracts have negotiated elements even if awarded from a bid list. Few clients always award contracts to the low bidder, but instead consider the bid price along with other negotiated factors. Read more

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