NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

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NMDOT Section 509 (as used on 2019-spec projects) limits portland-cement alkali content, unless the State Concrete Engineer approves otherwise, to less than:

0.20 percent as Na2O equivalent 0.80 percent by mass of alkalis as Na2O + 0.658 K2O (AASHTO T 105) 8.0 percent Na2O equivalent No alkali limit; any cement is acceptable

Correct Answer:

0.80 percent by mass of alkalis as Na2O + 0.658 K2O (AASHTO T 105)

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