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SBM 321 Lecture Notes: Concrete & Masonry R140,00
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Class notes

SBM 321 Lecture Notes: Concrete & Masonry

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These are some of the SBM 321 handwritten notes I made during my time at the University of Pretoria. These notes cover examples, explanations and additional research. They are written on either the given lecture slides or in a separate notebook. Have a look at the bundle deals if you are planni...

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  • May 30, 2021
  • 130
  • 2019/2020
  • Class notes
  • Prof e kearsley
  • 1-2

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JKEARNEY
NOTES




SBM 321

,Thema
#
:
Material Properties :
practical Gap
↳ AIL
Prism { section }
Concrete
-
Mortar 3



Potable water :



y Exothermic
process


}Hydrat
=
Water :

a' Efggisielimgansand
'



Water :(
→ Fine sand
) Lk .75mm
-




{
225g Siemens
-




Lxifo :
Aggregate : X
Coats:( Gravel) > 4.75mm
13.2

19.0mm

\ ↳ Non -




reacting 26.0mm

calciumchlori.de
↳ sets the Natural Manufactured
concrete fast Could contain ↳
Crushed material
day
↳
.




causes the Spherical shape Angular shape
↳ ↳ ↳

reinforcement High workability how
workability} Due
↳ ↳
.




to rust Low
High strength interlocking
↳ ↳
.


strength to .




Seawater *
Exothermicreact.io#yMaxtemp.dependson:-
at
Stronger 1) water content
↳
• - -




↳
earlyfor
Bad
age .




- * -
2) Contents
3) Volume
reinforcement a)
.


Aggregate Type
Note

for 1%
of air every we lose
↳AggregateTyp
Of ( in the mortar)
5- 6%
Light weight will be hotter
*




heatothydrationi.e.ysoimkapboittynt.u.wat.ee/cemen-
strength will have lower
Heavy weight
* a



ratio :




¥
I

in ,
WIC


@
50 -60%
85%
Ultimate
strength @
7-
days .




strength
80 28
Ultimate
days
-




.

,6- 16% { Cement → 150 -




600kg 1ms
12 -


20% { Water →
110
-



250
kg 1ms
{ fine 1600
2000kg 1ms
20 -30%
aggregate
→
-




.




40
-

45% { coarse aggregate →




tgpicalconcretedersityo
2450kg
1ms
→
2200 -

, Fai .FI?grgtueEement
water



✓
.
,



(
8878258 water hydration)
Concrete ✓ → Binds ( non
reacting ) aggregate .




Binder :
*Additionshoconcre.tl#
Cement 1) Additions Fine
powder
+
→
substitute cement
Addition ( s )
2) →
Admixtures Alte:
→ -
or
improve
chemicals .




Aggregates * Other terms :
-




are 70 80%
I -




of total t D Grout :→ Cement + water

2) Mortar : → Cement + water + sand
↳ Brickwork .




Massp
Concrete :
Range
36-16%150
-3600kg 1ms lcement
-




-110
250kg 1ms Iwate }
12-20%1600
→




lmsfµarseAggrcgw}
finettggregate.LI
-2000kg
} 20 -30%




ko -


55%




Notes
when
doing a mix
design
it's the mass Kglms
of that
is NOT
material
density inns of concrete
per .

, Portlandcemento
CaO Calcium Oxide
Basic form
{ 1) Limestone →



of cement .
↳ Ca COs } limestone .




( calcium silicates) 2) Si Oz Silicon Dioxide ( silica)
Clay
→




By heating

stagesofmanufacturi n gi . I O
.




Blending Produces
→
raw meat

:( Chalk)
} Blended
↳ Limestone

:( shale ) 80/20 ratio
Clay
↳
.




t
Roller Mills :
particles 490µm
OR Ball Mills :

② Heating
* Raw meat to 1400°C -


15002




gE÷d¥ iaEa¥
③




.edu/
Preheat
Precakining Vessel

tower
"




Iselin
#




#
Alumina & Iron oxide
tr t
( Flux 5%4 3% added)

,③
Cooling
→
Clinker ( 12004 ) cooled to 60°C

Mixed with ( 3- 5% )
gypsum AND
→



( 5% ) filler → limestone


④ All
ground ( ballmill )
↳ Produces : Por tland :



clinker
No time limit
storage
→


→ round ( 4- 15 diameter )

→
When milled use in 3 Months .




Flash
setting
→
.




Add control
Sos to
setting
→
.




→
A 1203 & Fez 03
-- →
Responsible for
flash
setting .

, Drycementproc.es#
Limestone
Quarry
Preheating
Intern mix


storage
Ball / Rod Mill

store SITU

kiln
Rotary
¥#rocess:

① Raw materials

② ( 20°C 250°C)
Drying
-




③
day )
( of
Preheating ( Os Decamp .




④ coz)
Calcining Ca Cao
→ +




⑤ ( 1500°C )
Burning 1200 C
-
-




⑥ Clinker .

,PC : Portland cement

ash
Fly
FA :




.




G- GBS : Ground Granulated blast -




furnace
slag
Oxides
A : AKO , Alumina

F : Fez Iron Oxide

M
MgO
:


controls the
z
setting time
-
→
→ .




5 : 503 →
Gypsum .




C : Cao Lime

f : Feo

S . Sick silica



Compounds :




Css

Css

CSA

CLIAF

, Mineralcompositionofpci silica oxide
.




Mineral
y.incement-cakiumyoxi.de f
035 A- lite 35-55 36051-02

#
-



C. 25 Bette 20
-




KO 26051-02
Important
minerals 3A 5-12 3CaOAIzOz
.




✓
C4AF 5-10 KCAOA 1203 Fez 03

M 0.3 k
MgO
-




(5 4-7 Cason

free time TC . 0,5-2,5 CaO




Afteraddingwatertfoighepaeqyent.ge#ydration:
strength gain ~

2035+7 H DH}
Ifrpefigtartgaitn {
" → ↳ 52hL, t 3. CH t




zczs
-
+ sit


tfoighpffecentc.ge/CzAt3C5Hzt26H-C6A53H32tDH
h
→ ↳ Satta + CH + AH }
# water .




strength gain
#
( ¢AFt3C5Hzt ( 26in) H → CoA 53 He t
w CF Hn t AH
.




Will determine ammountot
( 5,503 ) to be added gypsum
-
controls aluminium content to
flash
prevent setting .

, Important


§
Sulfide resistant
,→ cement : how Cz A




When the site is far
p away .




↳ :C 257 Css


¥ ↳ High strength
Late
Css > Cz s
.




High early strength :




Our common cement

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