July 1994 Table of Contents

Features A Contractor's Guide to Superplasticizers

Using high-range water reducers, also known as superplasticizers, to increase slump may be necessary for difficult wall placements. Read more

Features Armor Floor Surfaces with Metallic Aggregates

One way to maximize the life expectancy and reduce the maintenance needs of an industrial concrete floor is to treat the surface with a metallic-aggregate dry-shake hardener. Read more

Features Concrete for Every Application

Mix four basic ingredients - water, cement, sand, and aggregate - and you have concrete. Read more

Features Selecting a Material Spreader

A material spreader is used to apply one of several types of material, including floor hardeners, coloring materials, light reflectants, and aggregates. Read more

Features Twin Concrete Tanks Feature 52-Foot-Tall Walls

Two new stormwater retention tanks recently built at BP Oil's refinery in Toledo, Ohio, feature the tallest reinforced-concrete radius walls in the country. Read more

Features Raising the Roof

The Mayfair Shopping Mall is an exclusive mall located in Coconut Grove, Fla., near Miami. The changing character and lifestyle of the neighborhood prompted the owners to do a little remodeling. Read more

Features Reinforcing Bar Supports

Metal bar supports usually are made of plain or stainless steel wire and are one of the most common types used. Read more

Problem Clinic Limit Air Content in Floors to Receive Dry-Shake Hardeners

Why do manufacturers limit the content of air in concrete in floors that are going to receive a dry-shake metallic floor hardener? Read more

Problem Clinic Chloride Permeability Testing of Field-Cured Concrete

We're on a job that requires the microsilica concrete to be less than 600 coulombs chloride permeability at 28 days for laboratory-cured specimens and at 80 days for field-cured core samples, as measured in accordance with AASHTO T 277-83. There's a pay r Read more

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