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Daily Quiz (15)


True or false: Microcracking of concrete due to mechanical surface preparation methods is sometimes called spidering.


What is the term for the destructive reaction that occurs in concrete between cement paste and amorphous silica found in certain aggregates in the presence of moisture?


True or false: Bugholes can be caused by oil and grease on the surface being coated.


What causes the corrosion of rebar in concrete?


True or false: Plastic shrinkage cracking of concrete tends to occur during the first few hours after placement.


True or false: When soluble alkali ions react with chemically active forms of silica in concrete, the concrete deteriorates.


True or false: SSPC Guide 15 details how to test for the presence of chlorides on concrete substrates.


The accumulation of fats, oils and greases (FOG) can have what negative impact on sewer systems?


According to Fred Goodwin, one of JPCL’s Top Thinkers, the three Ds negatively affecting the durability of concrete are deterioration, damage and ... what else?


True or false: Destructive testing for measuring humidity in concrete flooring requires the use of jack hammers.


With what concrete finish method are you likely to see such problems as fins, protrusions and form release agents?


What is the name of the thin, weak surface layer that forms on concrete during pouring and finishing?


Which surface defect is normally associated with concrete?


What is the name of the thin, weak surface layer of concrete that forms during pouring or finishing?


Which of the following is a common contaminant on an exterior concrete wall that should be removed before coating?


 
 
   

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