November 1993 Table of Contents

Features Matching Power Trowels to Job Needs

Deciding to invest in a power trowel or to continue using traditional methods of hand finishing is not always an easy choice to make. Although there isn't a mathematical formula contractors can use to arrive at a decision, factors such as job size, time, and desired quality should be considered. For example, the larger the job and the less time available for finishing, the more efficient a power trowel becomes. A walk-behind power trowel can finish about 1,500 square feet daily, while a ride-on power trowel can finish about 3,000 square feet. An experienced hand-finishing crew can finish about 600 square feet per day. Keep in mind that power trowels consistently produce a high-quality finish, as well as create a harder and flatter surface. Read more

Features Finishing Tools for Concrete Flatwork

Skill in handling finishing tools only comes with training and practice. But the first step to successful finishing is choosing the right tool for the job. Here are the basic tools needed for most flatwork finishing operations, and the uses for each: Read more

Features W-H-I-T-E-T-O-P-P-I-N-G Spells Relief in Iowa

Whitetopping, placing a concrete overlay on deteriorated asphalt pavements, is Iowa's solution to higher maintenance costs. Since 1960, Iowa counties have whitetopped more than 300 miles of asphalt pavement, eliminating potholes, cracks, raveling and rutting surfaces, and loose gravel. Read more

Features Shotcrete Homes Challenge Wood-Frame Construction

The first shotcrete homes were built shortly after the shotcrete process was invented in 1910. In the 1960's a new shotcrete construction panel system was developed. Referred to as welded wire sandwich panels (WWSP), the system has a core of polyurethane or polystyrene insulation sandwiched between two layers of welded wire fabric. The panels, which usually measure about 4x8 feet, are erected and joined on the jobsite, and covered with a minimum of 1.5 inches of shotcrete on both sides. Read more

Features Marketing Basics for Contractors

Because so much of construction work is bid oriented, many contractors see little benefit in marketing their services. Remember, wherever there is a restricted bid list, there have been several successful marketing efforts. The reason is that the contractors on the list convinced a decision maker that they offered more than the plans and specifications could identify. In other words, they sold an intangible product, such as quality, experience, reliability, or warranty. Read more

Problem Clinic Late-Winter Concrete

The late winter and early spring concreting seasons are coming up. Are there any special precautions we should take? Read more

Problem Clinic Gym Floor Flatness

We are bidding a job that has a slab-on-grade gymnasium floor with specified floor flatness of FF 100 / FL 50. Is this reasonable? Read more

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