December 1993 Table of Contents

Features Crane Safety Basics

Crane accidents are preventable. Most are caused by inexperience, neglecting to preplan a lift, failure to inspect the crane and rigging before a lift, not setting up the crane properly, improperly rigging the load, and other similar problems. Knowing the basics of safe crane operation not only helps complete jobs safely, it also improves jobsite efficiency. Read more

Features Craftsmanship and Planning Lead to Quality Floor

Craftsmanship, quality control, and teamwork were basic elements in producing an attractive, durable concrete floor at a competitive price for a warehouse store in Westland, Mich. The 122,000-square-foot, 8-inch-thick floor was completed in 10 working days. The floor profile quality exceeded minimum requirements for flatness and levelness. Read more

Features The Wide World of Shotcrete

Simply said, shotcrete is sprayed concrete or mortar. There are two different types of shotcrete: wet mix and dry mix. With dry mix, the dry ingredients are mixed and blown in a stream of compressed air through the hose to the nozzle where water is added immediately before the material exits the nozzle; only enough water for hydration is required. Elimination of surplus water results in high-quality concrete and virtually eliminates shrinkage and cracking. Read more

Features High-Priced Help

Higher prices are fine if you can deliver quality workmanship. What happens when you are charging more than other contractors who offer the same services? If you find that's the case, it's time to realize that you aren't competitive and that you can do one of two things: Improve your competitive position by reducing your costs or be forced out of the market by more efficient producers. Read more

Features Excellence in Concrete Pavement

Cooperation seems to be the watchword for the 1993 winners and runners-up in the fourth annual National Awards Program for Excellence in Concrete Pavement. The awards recognize contractors, engineers, and owners who completed projects in 1992 that exemplify state-of-the-art construction and management techniques, as well as pavement quality. Read more

Problem Clinic Adding Latex Paint to Concrete

We're bidding a job that requires a white concrete floor. Another bidder has proposed mixing white latex paint in with the concrete. Can this work? Read more

Problem Clinic What's Infrared Thermography?

We're repairing a bridge deck that requires several partial-depth patches. The engineer recently handed me a computer printout of the bridge deck that showed the delaminated areas. I asked him how the delaminated areas were detected, and he said that one Read more

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