1
Câu 1 (
3
/, cmg
o
)
o
oV
m
(g/cm
3
),(kg/dm
3
),(T/m
3
)
->m1=m+
parafin
m
.ngâm ng ->
gmmPFAS )21(
(1)
gVVF nparafinoAS .).(
(2)
gmmgV nparafin ).21(.). .
->(
n
Vo
mm
Vparafin
21
)
->
parafinn
ommmm
m
121
(
3
/cmg
)
3
/1 cmg
n
2mm
m
no
->m1
-
ngô
m'
ngô
ngô
oV
mm
'
'
1
-
o
+
-BT:
= 1,8 -2,5g/cm
3
-
= 0,5 - 1,8 g/cm
3
-
<0,5 g/cm
3
-
=2,5 - 5 g/cm
3
- - 25 MPa
- - 50 MPa
2
-BT cao : 60 - 100 MPa
-
-
-
-
-
-
-
OH2
2
.3 SiOCaO
,
3232322 ..4,.3,.2 OFeOAlCaOAlCaSiOCa
i:
- - -
-
-
-
-2cm.
3
-88%), h(8-11%),,O(0-1,5%),,S(0-6%),,N(0-
o
t
-
F
pmax
(N/mm3 = MPa)
pmax
-
n
R
Ri
tb
Rtb
-
-
-
-
-
-
-
-3cm)
4
- 10 cm
-4 cm
- 20 cm
-
-
-
->ch
-0,6%
-2%
->Fe
6-10.
12-42.
-
01 lll
5
%100.
0
l
l
%100.
0
0
F
FF k
đh
đh
dh
E
F
P
1
1
1
P=P2
F
P
2
2
2
0<
1
<
2
-
:
12
12
tgEđh
-
-
.E
-
-
-
-
-
Bê tôn
-BT:
= 1,8 -2,5g/cm
3
-
= 0,5 - 1,8 g/cm
3
-
<0,5 g/cm
3
-
=2,5 - 5 g/cm
3
- - 25 MPa
- - 50 MPa
-BT cao : 60 - 100 MPa
-
32
-
-