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The D+D Guide to concrete

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Daily Quiz (19)

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For successful application to green concrete, epoxies must be vapor-permeable and must have what other characteristic?

Tuesday, December 20, 2016


True or false: The calcium chloride moisture test for concrete, ASTM F1869, measures the amount of moisture emission in only about the top inch of a slab’s depth.

Thursday, November 10, 2016


True or false: SSPC has several standards for surface preparation of concrete.

Wednesday, October 26, 2016


What organization recently published Placing and Finishing Decorative Concrete Flatwork?

Thursday, October 13, 2016


True or false: Shotcreting produces a surface profile too rough for thin coatings.

Wednesday, October 12, 2016


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?

Friday, September 30, 2016


True or false: Laitance, sealers and other surface contaminants do not have to be removed prior to performing a moisture test on a concrete floor slab, according to a recent JPCL article.

Wednesday, September 14, 2016


What organization produces rubber replica templates to judge the degree of surface profile on concrete?

Wednesday, September 7, 2016


True or false: According to a recent JPCL article, the threshold values in ASTM standards for deeming concrete suitable to be coated are neither achievable nor realistic for below-grade structures.

Tuesday, August 30, 2016


What organization is developing the “Guide for Fluid Applied Air Barrier Coatings for Concrete Masonry Units”?

Monday, August 8, 2016


What organization produces standards for the surface preparation of concrete?

Thursday, August 4, 2016


True or false: The plastic sheet method of detecting moisture in concrete substrates can be used only on floors or other horizontal surfaces.

Thursday, June 16, 2016


ASTM standards describe how many methods of measuring moisture in concrete?

Wednesday, June 8, 2016


True or false: Aggressive application of dehumidification to dry a concrete floor slab should begin within the first 10 days after placement.

Friday, May 27, 2016


True or false: A clear polyurethane used to seal a coated concrete surface should exhibit maximum turbidity.

Thursday, May 26, 2016


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

Thursday, May 19, 2016


Meters for determining moisture content of concrete slabs are based on what principle of operation?

Wednesday, May 11, 2016


True or false: Crystalline waterproofing materials can be used only after concrete cures.

Monday, May 2, 2016


True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of surface profile on concrete.

Wednesday, April 20, 2016


   
 

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