December 1970 Table of Contents

Problem Clinic Wash Water

The ready mixed concrete producer with whom I do business reuses wash water in subsequent batches. Is this permissible? Read more

Problem Clinic Russian Coup?

About ten years ago, one of the engineering journals reported that the Russians had developed a flexible concrete which could be welded by chemically softening adjacent surfaces and joining them under pressure. Is this material available? Read more

Problem Clinic Watertight Walls

Is it possible for a 16 inch concrete wall, reinforced with # 7 Bars, 9 inches on center, each way, each face to be watertight under normal conditions? Above walls are for a sewage pumping station, located where the water table is approximately 3-4 feet b Read more

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