SBM 321
TB :
construction mut .
5th ed.
① BUY !!
Stress strain behavior : 100x100x100mm =
I l
Load
X rate
dependent
x
Static/permanent
Impact/dynamic
X
Cyclic
Testing short specimen
: to test mat
- strength
Pl 2x0 = h NOT structural/shape strength .
F
CREEP :
1 ·
↓ viscoelastic
E
M -
elastic-i
,
Under sustained load
① fracture
-
- State rapidly.
-
inc
I
I
Primary" Secondar
,
"
Mean strength US Characteristic
.
Strength
L
tress
near
↳ mean
average strength
~
-
,
4
&
-
-
oa
11
pat
failure
.
,
,
, Chapter 13
Cement Properties ?
Why added
gypsum
Portland Cement :
calcium silicates 3% added to protect CA
calcium
oxide
silica/ silicon gypsum
dioxide "extends reaction"
* consists of CaO and SiOz
* made from limestone/chalk (cacos) and Clay (silica
*
Contains other oxides such as Al , Fe , Na ,
K
Hydrated (HCP)
Cement Paste
Calcium Silica hydr ? /CSH)
=
-
① limestone or PHYSICAL PROPERTIES :
chalk
are blended
and clay
Cheati1400-1308
ng Portland
Gs
cements are fire
grey powders
=
3 .
14 Size :
2-80 nm
coal/oil/gas
rotates material / to inc rate of
② form
minerals heating
here
③
granular material
comes out
d
mixed with gypsum
↳ make cement
grind up to
CHEMICAL PROPERTIES :
lower kiln efficiency
-
get more [S
A lite (fast hardening cement)
KNOW !
->
-> Belite (slow
hardening cement)
These compounds start to form & diff temps clinker heats in kiln
as
up
Belite (C2S)
3
starts to form
a 700
-
& 1450° most of belife -> alite
,
Alite ((35) 11
1300°C
-
&
CsA and CAF forme 900°C
-
↓
Bogue numbers/equations :
to calculate compound composition
↓
wen
-
from e
SOz
add up 100 % But these the
are
working parts of concrete
.
TB :
construction mut .
5th ed.
① BUY !!
Stress strain behavior : 100x100x100mm =
I l
Load
X rate
dependent
x
Static/permanent
Impact/dynamic
X
Cyclic
Testing short specimen
: to test mat
- strength
Pl 2x0 = h NOT structural/shape strength .
F
CREEP :
1 ·
↓ viscoelastic
E
M -
elastic-i
,
Under sustained load
① fracture
-
- State rapidly.
-
inc
I
I
Primary" Secondar
,
"
Mean strength US Characteristic
.
Strength
L
tress
near
↳ mean
average strength
~
-
,
4
&
-
-
oa
11
pat
failure
.
,
,
, Chapter 13
Cement Properties ?
Why added
gypsum
Portland Cement :
calcium silicates 3% added to protect CA
calcium
oxide
silica/ silicon gypsum
dioxide "extends reaction"
* consists of CaO and SiOz
* made from limestone/chalk (cacos) and Clay (silica
*
Contains other oxides such as Al , Fe , Na ,
K
Hydrated (HCP)
Cement Paste
Calcium Silica hydr ? /CSH)
=
-
① limestone or PHYSICAL PROPERTIES :
chalk
are blended
and clay
Cheati1400-1308
ng Portland
Gs
cements are fire
grey powders
=
3 .
14 Size :
2-80 nm
coal/oil/gas
rotates material / to inc rate of
② form
minerals heating
here
③
granular material
comes out
d
mixed with gypsum
↳ make cement
grind up to
CHEMICAL PROPERTIES :
lower kiln efficiency
-
get more [S
A lite (fast hardening cement)
KNOW !
->
-> Belite (slow
hardening cement)
These compounds start to form & diff temps clinker heats in kiln
as
up
Belite (C2S)
3
starts to form
a 700
-
& 1450° most of belife -> alite
,
Alite ((35) 11
1300°C
-
&
CsA and CAF forme 900°C
-
↓
Bogue numbers/equations :
to calculate compound composition
↓
wen
-
from e
SOz
add up 100 % But these the
are
working parts of concrete
.
