Exam (elaborations)
Civil materials quiz 2 (1).
- Course
- Biochemistry Module 3
- Institution
- Biochemistry Module 3
Civil materials quiz 2 (1).
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type I - CORRECT ANSWER-general purpose cement used in constructiontype II - CORRECT ANSWER-used in high heat scenario/underground construction
type III - CORRECT ANSWER-used in cold weather construction/high yield strength
type IV - CORRECT ANSWER-low heat of hydration/ used in large scale
construction
type V - CORRECT ANSWER-high resistance to sulfate attacks
% cumulative retained - CORRECT ANSWER-(cumulative mass retained/total mass)
*100
% passing - CORRECT ANSWER-100 - cumulative % retained
air entrainer - CORRECT ANSWER-lower surface tension of water allowing for
evenly smaller distributed bubbles , allowing for the expansion of water when
freezing
gypsum - CORRECT ANSWER-added to mixture to slow setting process
water to cement ratio - CORRECT ANSWER-lower ratio=stronger concrete
, strength - CORRECT ANSWER-tricaliumsilicate/dicalium silicate
quick setting - CORRECT ANSWER-tricalcium aluminate/ tetracalcium aluminoferrite
specific gravity of cement - CORRECT ANSWER-3.15
water needed for hydration - CORRECT ANSWER-0.4
Portland Cement Concrete - CORRECT ANSWER-60-75% of volume/80-85% of
weight
Hot Mix Asphalt - CORRECT ANSWER-80-90% of volume
90-96% of weight
coarse aggregate - CORRECT ANSWER-Retained on No. 4 Sieve (opening: 0.187
inch, 4.75 mm)
fine aggregate - CORRECT ANSWER-passing No. 4 (4.75mm) sieve
high friction - CORRECT ANSWER-angular and rough strength and stability of
asphalt
low friction - CORRECT ANSWER-rounded and smooth for workability of concrete
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