October 1991 Table of Contents

Features Downsized Pavers

Profits can be made in the curb and gutter, sidewalk, bridge parapet, and median barrier markets if you have the right paving equipment. The Concrete Paver Bureau within the Construction Industry Manufacturer's Association (CIMA) has grouped paving machines into three categories: curb and gutter, multipurpose, and slipform pavers. Read more

Features Promoting Concrete Parking Lots and Streets

To be a successful concrete promoter requires a little motivation and a lot of hard work. The first thing you must determine is if you really want to promote concrete. Although it sounds silly, the truth is if there isn't a producer who's willing to supply the concrete when it's needed, paving promotion efforts don't make much sense. Once you've committed yourself to promotion, the education process begins. Promoters must know about all aspects of concrete paving, including design, construction, specifications, costs, contractors, and competing materials. Read more

Features Reusable Steel Side Forms for Paving

Contractors looking for a market niche might consider going after paving jobs that aren't suited for slipforming but can be done with side forms. Steel side forms are a smaller investment than slipforms, and they pay for themselves more quickly. Cities and counties are replacing asphalt pavements at intersections with concrete, creating opportunities for contractors to find work. Municipal curb, gutter, and sidewalk repair is also big business for contractors. Contractors can also consider concrete airport pavements that aren't reinforced and require the use of side forms for thick pavements. Read more

Features Imprinted Concrete Accents Elegant Home

Mr. and Mrs. Warren Langford wanted the steps and sidewalks leading to their palatial dream home in Frontenac, Missouri, to be as dramatic as the home itself. But they also wanted to use a material that was economical. So, as a low-cost alternative to stone, they chose concrete, imprinted to simulate rough-cut limestone, for the home's 950 square feet of sidewalks and patios and 175 lineal feet of steps. To achieve the limestone coloring, a custom-blended color hardener was applied thickly to the concrete surfaces to lighten them. Read more

Features How to Protect Your Residential Concrete Investment

Homeowners can take measures to ensure good performance and prevent problems with their concrete foundations and flatwork. To avoid wall cracking, the builder should have sloped the soil at least 1 inch per lineal foot of run while soil grading around the house was being done. That slope should continue at least 5 feet beyond the foundation or to a well-sloped sidewalk or patio. This makes rain runoff flow away from the house. Read more

Oldest Concrete Pavement Celebrates 100 Years Feature Oldest Concrete Pavement Celebrates 100 Years

One hundred years ago, a Bellefontaine, Ohio, chemist named George W. Bartholomew attempted to solve a dust and mud problem. Read more

Features Trans-Canada Highway Intersections Receive Concrete Facelift

The concrete industry felt the thrill of victory when Medicine Hat, Alberta, decided to replace deteriorated asphalt intersections on the Trans-Canada Highway with concrete. Robert Seme, regional paving engineer of the Canadian Portland Cement Association's western region, calls the project "the largest major intersection rehab in concrete in Canada." About 140,000 square feet of concrete pavement were used to restore the asphalt intersections and intersection approach lanes. Read more

Features Mat Foundation and Post-Tensioned Frame Solve Site Problems

Designing and building the Bourse Garage and theater complex in part of Philadelphia's old city presented contractors with a challenge. Narrow streets, limited site access, a high water table, and making the building fit with the nearby historic buildings were some of the obstacles contractors overcame to win a Grand Prize in the General Building Contractors Association Concrete Awards Program. Read more

Features Support Needed to Preserve Concrete Paving Market

The concrete industry is concerned that it may lose more of its already small concrete paving market because mechanistic design methods used in Illinois may spread to other states. Mechanistic methods used by the Illinois Department of Transportation (IDOT) require thicker concrete pavements than would be required if conventional design procedures were used. Asphalt pavements designed by IDOT's mechanistic methods, on the other hand, are generally thinner than those designed by other procedures. Critics say the designs aren't comparable and the maintenance and rehabilitation costs used in life-cycle cost comparisons aren't supported by actual performance data. Because of this, they say, the pavement selection process that's a part of IDOT's design method favors asphalt over concrete. Read more

Problem Clinic Long-Strip Construction Preferred for Slabs on Ground

We're building a slab on grade for a large warehouse. The engineers want us to place 5,000 square feet maximum for each pour and use a checkerboard sequence. We're able to place 10,000 to 15,000 square feet daily if we're allowed to use the long-strip met Read more

Problem Clinic Recommended Depth for Control Joints

We're working with a specification that says control joints must be cut to a depth equal to one-third the slab thickness. All the recommendations we can find suggest a depth of one-quarter the slab thickness, with a minimum of 1 inch. Do you know of a bas Read more

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