March 1987 Table of Contents

Features The Concrete Garden

This article is about Harland J. Hand's experiences with concrete while building and maintaining his own half-acre garden in El Cerrito, California. Read more

Features Precast Twin Tees Make Attractive Retaining Walls for Highway

One of the last stretches of I-70 in Colorado had to pass through Glenwood Canyon where steep canyon walls slope to the edge of the Colorado River. Read more

Features High Fiber Diet Improves Precast Concrete

Today precast concrete manufacturers are adding synthetic fibers to their products. Through experience, they have found that fibers not only control cracking but improve impact resistance and watertightness. Read more

Features Accelerator Offers Freezing Protection

Cold weather concreting can be a gamble. Freezing at an early age may damage the concrete. Read more

Features Are Pavement Joint Sealants Always Necessary?

For years, accepted engineering practice has called for sealing contraction joints in concrete pavements to keep out water and incompressible materials. The prevailing theory has been that if water enters the joints, it will erode the subbase and weaken the subgrade. Read more

Problem Clinic Make It Routine: Check the Air

We built a 2-acre parking lot for a local shopping center. It was salted regularly during the first winter and by spring there was widespread scaling. The owner had some tests made that showed that the air content was very low in the scaled areas. We are Read more

Problem Clinic Cause of Spalling or Scaling

Our company placed about 300 cubic yards of concrete in curbs, sidewalks and aprons in a business district whose roads are serviced by the state. The concrete was certified to be 3500 psi and air-entrained. Welded wire fabric, size 6 x 6 - W1.4 x W1.4, wa Read more

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