A) its density is correctly related to the density of concrete
B) it is relatively inexpensive compared to other metals
C) its coefficient of thermal expansion is the same as that of concrete
D) its Poissons ratio is the same as that of concrete
2007-08-05 06:46:46 · 6 answers · asked by Kai K 1 in Science & Mathematics ➔ Engineering
The real reason is because steel is strong in tension and concrete is not.
Since that is not one of the options given, the only choice is B)
2007-08-05 16:42:06 · answer #1 · answered by gatorbait 7 · 1⤊ 0⤋
B
For up to 4 storey bldng, it is safe and economical to use reinforce concrete. On beams, it is not advisable to use concrete only due to tensile properties of concrete is not that sufficient, it is only 9mpa, it can only use concrete when less than 1meter on the length of span. Otherwise, if too much steel was used , it is not so ductile, it can not resist lateral pressures like earthquakes.
2007-08-05 18:24:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Steel and concrete complement each other. Steel is strong in tensile strength, while concrete is strong in compression.
The fact that (C) above is true is a big help.
2007-08-05 13:57:51 · answer #3 · answered by aviophage 7 · 2⤊ 1⤋
I always thought it was because steel has good tensile strength and concrete has practically none. and vice a versa.
Together they make a great combination of strength in both tension and in compression,
2007-08-05 07:12:37 · answer #4 · answered by andyg77 7 · 2⤊ 0⤋
c
2007-08-05 06:55:02 · answer #5 · answered by acecoolman123 2 · 0⤊ 1⤋
Its for building that simple
2007-08-05 06:56:09 · answer #6 · answered by Whats His Face 3 · 0⤊ 4⤋