May 1980 Table of Contents

Preventive Maintenance for Concrete Placement Booms

For maximum safety, concrete placement booms should be inspected and tested regularly, overhauled when necessary, and operated by properly trained personnel. Read more

Fabric Forms for Erosion Control and Pile Jacketing

Fabric forming offers exceptional advantages for underwater work where conventional rigid forms are very expensive and concrete placement by the tremie method further adds to the cost. Read more

Fabric Forms Conform to Any Shape

If we free our minds from the constraints of stiff, rigid, inflexible formwork for concrete, any previously difficult jobs are practical and many heretofore impossible jobs can be done. Read more

Features Electrically Conductive Concrete

Over the years varying degrees of success have attended efforts to design concrete mixes capable of conducting electricity for various applications such as grounding, protecting against lightning, eliminating static electricity, environmental heating, and radio frequency interference screening. Read more

Problem Clinic Midstream Horse Switching

We are the architects on a concrete house that is to have an exposed-aggregate finish produced by sandblasting. A 12-foot-high continuous wall, which comes out of a hill, is more than 200 feet long and is being placed in sections, using 2500-psi concrete. Read more

Problem Clinic Proportioning Mixes With Fly Ash

We are interested in any articles concerning the design and use of concrete mixes made with fly ash. Read more

Problem Clinic Removing Oil Stains

We have a 3000-psi concrete slab six months old that is already oil-stained. The oil doesn't come off with muriatic acid. How can we get it off? Read more

Problem Clinic Order a Little More Concrete If No Vapor Barrier

Does it require more concrete for a slab if there is no vapor barrier? Read more

Problem Clinic Change in Cement Changes Flatwork Color

Construction contingencies caused us to end up with a one-panel gap in a driveway. Later we filled this in with another load. We have learned that the Portland cement in the last load came from a different cement plant from the rest. Could a change in cem Read more

Close X