Cement in Construction

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is Portland cement primarily composed of?

  • Magnesium silicates and magnesium aluminates
  • Calcium silicates and calcium aluminates (correct)
  • Calcium carbonates and calcium oxides
  • Silicon dioxide and calcium hydroxide

What is the nature of all Portland cements?

  • Exothermic
  • Hydraulic (correct)
  • Endothermic
  • Non-hydraulic

What is the result of the chemical reactions that occur when water is added to Portland cement?

  • The release of heat energy (correct)
  • The absorption of heat energy
  • The release of carbon dioxide
  • The formation of calcium carbonate

What is formed when tricalcium silicate (C3S) and dicalcium silicate (C2S) react with water?

<p>Calcium silicate hydrates (C-S-H) and calcium hydroxide (CH) (D)</p> Signup and view all the answers

Why is Portland cement named as such?

<p>It is named after the rock it resembles (A)</p> Signup and view all the answers

What is the chemical formula for alumina?

<p>Al2O3 (C)</p> Signup and view all the answers

What is the primary purpose of calcium sulfate in cement?

<p>To slow down the setting action of cement (D)</p> Signup and view all the answers

What is the result of excess sulfur trioxide in cement?

<p>The corrosion of concrete structures (D)</p> Signup and view all the answers

What type of cement is the most widely used?

<p>Portland cement (A)</p> Signup and view all the answers

What happens when excess magnesia is present in cement?

<p>The strength of cement decreases (C)</p> Signup and view all the answers

What is the result of excess alkaline matter in cement?

<p>Efflorescence (A)</p> Signup and view all the answers

What is the primary function of cement in construction?

<p>To serve as a binding medium (A)</p> Signup and view all the answers

What is the result of excess lime in cement?

<p>Expansion and disintegration of the cement (D)</p> Signup and view all the answers

What is the typical color of cement?

<p>Gray (A)</p> Signup and view all the answers

What is the process of producing cement called?

<p>Calcination (D)</p> Signup and view all the answers

What is the result of a deficiency in lime in cement?

<p>Reduced strength and faster setting (A)</p> Signup and view all the answers

What is the approximate percentage of silica in cement?

<p>20% to 30% (B)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser