Get a candid look at ten popular, but mistaken ideas that still exist in concrete construction.

In this video, using examples, interviews, and demonstrations, this revealing video from the Portland Cement Association exposes and explains the most common misconceptions associated with the cement and concrete industry. The video is designed as an educational training tool for workers of all experience levels. Running time: 17 minutes © 2005 Portland Cement Association

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Some of the myths and misconceptions related to concrete construction:

“Adding water to the mixed is believed to be the only way to increase slumps, while water reducers and superplasticizers can also be used to increase slumps while maintaining the water-to-cement ratio. Specification of a concrete mix by the number of bags of cement is an incomplete form of specification and the specification should be based on performance requirements. Water and other substances in liquid and vapor forms can pass through concrete and it is wrong to believe that concrete is impermeable. Another misconception is that calcium chloride is an antifreeze agent, while the truth is that calcium chloride is only an accelerator. Precautions should be taken to protect concrete and prevent future soil problems in adverse weather conditions. Another misconception is that reinforced concrete won’t crack, it only holds the crack faces together. Top 10 myths in concrete construction.” ~

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