Quiz
Chapter 6
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Fragen in diesem Quiz (18)
1[blank_start]Cement[blank_end] acts as flue when mixed with water to hold aggregate together.
- ACement
2The three major raw materials used in cement are calcareous, argillaceous, and gypsum.
- ARichtig
- BFalsch
3PCC compounds are formed before the curing process, right before water is added to the mixture.
- ARichtig
- BFalsch
4Which of the following are typical primary compounds found in PCC mixture.
- Atricalcium silicate
- Btitanium oxide
- Csodium oxide
- Ddicalcium silicate
- Etricalcium aluminate
5The finer the aggregate, the better water bonds with the particles.
- ARichtig
- BFalsch
6Having a PCC Specific Gravity below 3.15 means the concrete is a [blank_start]light[blank_end] concrete. It is [blank_start]not suitable[blank_end] for structural means.
- Alight
- Bnot suitable
7In order for primary compounds to get to a proper strength, all particles must be hydrated.
- ARichtig
- BFalsch
8The three top important aspects of PCC design are hydration, fineness, and specific gravity.
- ARichtig
- BFalsch
9PCC is less reactive in warm, humid environments.
- ARichtig
- BFalsch
10Heat evolution graphs are used to map the progress of hydration.
- ARichtig
- BFalsch
11Match each option to the stage.
- AWater added to dry mix
- Bsilicate and aluminate are formed
- Cmolecular bonding and matr'l strengthing
- Dconcrete reached desired strength
12Cement hydration is [blank_start]exothermic[blank_end].
- Aexothermic
- Bendothermic
13Hydration must be carefully controlled because it can be detrimental by leading to cracking through thermal gradients, but also helpful as the heat provides activation energy in cold weather.
- ARichtig
- BFalsch
14Rate of [blank_start]setting[blank_end] (solidification) is governed by the balance of aluminate and sulfate.
- Asetting
15When cement paste stiffens, it is changing from a solid to a plastic state.
- ARichtig
- BFalsch
16Quick set cement has a very high concentration of [blank_start]aluminate[blank_end], but a low concentration of [blank_start]sulfate[blank_end]. this cement can only take light loads.
- Aaluminate
- Bsulfate
- Caluminate
- Dsulfate
17[blank_start]Hardening[blank_end] - strength gain through settling.
[blank_start]False set[blank_end] - when cement, exposed to high humidity, stiffens within minutes of mixing without the evolution of heat
[blank_start]Flash set[blank_end] - large heat evolution, poor ultimate strength- AHardening
- BFalse set
- CFlash set
- DHardening
- EFalse set
- FFlash set
- GHardening
- HFalse set
- IFlash set
18False set varies the compressive strength of concrete which is not good.
- ARichtig
- BFalsch
Informationen
- Beschreibung
- Engineering (CE Materials) Quiz am Chapter 6, erstellt von Kiki Medina am 20/04/2019.
- Autor
- Kiki Medina
- Sprache
- English
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- 0
- Schlagwörter
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