August 1993 Table of Contents

Features Ordering Ready Mix Concrete

Planning ahead and communicating with the supplier are fundamental aspects of ordering ready mix. Though every contractor has preferences on how to do things, here are some important considerations. Read more

Features Durable Concrete

Durable concrete resists weathering, chemical attack, and other types of deterioration. An important factor in concrete durability is concrete quality. Quality concrete has properties that match the application and expected exposure conditions. Read more

Features Testing Fresh Concrete in the Field

ASTM standards define precise procedures for performing field tests to determine the quality of freshly mixed concrete. Usual field tests measure consistency, strength, unit weight, air content, and temperature. Many test details seem trivial, even arbitrary. However, ASTM standards establish uniformity in the testing methods. By always performing tests the same way, it's possible to detect changes in fresh concrete that could affect concrete performance. Understanding the scope, significance, and procedure of each test for fresh concrete is the first sep to achieving accurate results. Read more

Features Marketing Tilt-Up

Tilt-up concrete is a flexible building product that can provide superior results if managed and specified properly. But to achieve success in the tilt-up market, concrete contractors must do more than just master tilt-up construction procedures. They must establish a strong customer base by informing prospects of tilt-up's durability and cost-effectiveness. Read more

Features Tilt-Up Concrete Houses -- Yesterday and Today

Tilt-up concrete housing makes more sense today than ever before. Victor Greimann, a tilt-up pioneer from Kettering, Ohio, certainly thinks so. Greimann still remembers his first building endeavor with nostalgia. It was 1946, just after World War II. The homes were relatively small, like many so-called GI homes built in great numbers to ease the post-war shortage. "However, ... the market began to change in the 1950s and 1960s. People were becoming more affluent and desired more upscale homes." Read more

Features Artist Uses Cement as a Window to the Soul

A sculptor and art instructor for more than 10 years, Rick True has used a variety of materials. He has created art from cast bronze, welded steel, and latex, and is best known for his large-scale wood sculptures. But True's ecological concerns about using lumber motivated him to explore the use of cementitious materials. Read more

Features What's New in Chemical Admixtures?

Chemical admixtures help concrete contractors gain more control over their work and meet customer demands for year-round construction, shorter project completion times, and improved concrete performance. For example, accelerators can be used to shorten set times in cold weather, superplasticizers to improve workability and increase strength, retarders to extend set times, and air-entraining agents to enhance freeze-thaw resistance. Read more

Problem Clinic Using the Break-Off Test to Measure In-Place Strength

The Problem Clinic in the June 1993 issue of Concrete Construction, described the use of pull-out tests to determine the in-place strength of concrete. What about the break-off test? Read more

Problem Clinic Adding Water

I once saw some rules of thumb about the effects of adding water to a concrete mix, but I can't find them. Read more

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