Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

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

13 Questions

2 Views

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

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

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

with blended cement (correct)

in the presence of high humidity

in the presence of reactive aggregates

with a cement rich in Na2O and K2O

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

Reduction of pH of concrete pore solution (correct)

Rebar cross section reduction

Cover spalling

Loss of adherence concrete-reinforcement

The carbonation factor K depends on which of the following?

W/C ratio (correct)

Type of rebar

Chlorides content

Maximum aggregate diameter

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

Close to +600 mV 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?

0.55 Signup and view all the answers

What is a typical value of maximum corrosion penetration?

50-200 μm Signup and view all the answers

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

Creating a network of porosity Signup and view all the answers

Which parameter does NOT influence rebar corrosion rate?

The concrete cover Signup and view all the answers

When does the maximum carbonation rate in concrete occur?

When the RH is in the range 60% to 80% Signup and view all the answers

What is true about chloride-induced corrosion in concrete?

It may cause the rebar cross-section reduction Signup and view all the answers

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

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

What defines the durability of a reinforced concrete structure?

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

What does permeation of concrete refer to?

The penetration of substances into concrete Signup and view all the answers