March 1996 Table of Contents

Features Compacting Soils and Subbases

Proper soil compaction can avoid many pavement problems by increasing load-bearing capacity, decreasing water seepage, and minimizing soil settlement. The goal of compaction is to pack as many soil solids as possible into a given space. Read more

Features Tackling Tight Turns

Successfully maneuvering a large, heavy paver through tight turns, such as those required for parking-lot islands or cul-de-sacs, requires a skilled operator working under ideal jobsite conditions. Read more

Features Air Pump Increases Material-Handling Options

Larry Booth, owner of Advanced Pumping Systems, Puyallup, Wash., created a pumping system that is especially useful for placing granular base material in confined areas. Read more

Features Solutions to Scaling Concrete

The American Concrete Institute defines scaling as "local flaking or peeling away of the near-surface portion of hardened concrete or mortar." Scaling is caused by several factors, with deicing chemicals and severe freeze-thaw cycles being the best known. Read more

Features Concrete Runway Built for Smooth Landings

Dallas/Fort Worth International Airport's seventh runway, 8,500 feet long and 150 feet wide, will soon meet demanding construction standards for smoothness. Read more

Features Building a Concrete Dome House

When retired mechanic Norval Jones turned 70, he decided to build his own retirement home - a 30-foot-wide, 15-foot-tall concrete geodesic dome. Read more

Problem Clinic Can Rebound Hammer Results Determine Safe Form-Stripping Time?

We're on a job that requires a fast forming cycle. If we calibrate our rebound hammer for the concrete being used on the job, are the hammer test results accurate enough to determine when forms can be safely stripped? Read more

Problem Clinic Stay-In-Place Divider Strips and Side Forms for Flatwork

What are the pros and cons of using redwood stay-in-place divider strips and bulkheads for flatwork? Read more

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