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By @nicolasarnold

Cementitious Materials Quiz: Silica-alkali Reaction, Rebar Corrosion, and Carbonation Factor

Created by CompactCarolingianArt

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Questions and Answers

In which of the following conditions does Silica-alkali reaction NOT occur?

with blended cement

Which of the following is NOT a consequence of rebar corrosion?

Reduction of pH of concrete pore solution

The carbonation factor K depends on which of the following?

W/C ratio

According to ASTM C876 standard, what is the typical potential of a passive reinforcement?

<p>Close to +600 mV</p> Signup and view all the answers

If two different W/C ratios are obtained during mixture proportion calculations, which W/C ratio may be used?

<p>0.55</p> Signup and view all the answers

What is a typical value of maximum corrosion penetration?

<p>50-200 μm</p> Signup and view all the answers

Which of the following is the primary function of air-entraining agents in concrete?

<p>Creating a network of porosity</p> Signup and view all the answers

Which parameter does NOT influence rebar corrosion rate?

<p>The concrete cover</p> Signup and view all the answers

When does the maximum carbonation rate in concrete occur?

<p>When the RH is in the range 60% to 80%</p> Signup and view all the answers

What is true about chloride-induced corrosion in concrete?

<p>It may cause the rebar cross-section reduction</p> Signup and view all the answers

What is the critical chloride threshold for carbon steel reinforced concrete structures exposed to atmosphere?

<p>In the range of 0.4 - 1% respect the concrete weight</p> Signup and view all the answers

What defines the durability of a reinforced concrete structure?

<p>The period in which the proper safety and reliability level of the structure should be assured</p> Signup and view all the answers

What does permeation of concrete refer to?

<p>The penetration of substances into concrete</p> Signup and view all the answers

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