brief introduction fired brick autoclaved brick §6.2 wall bricks
TRANSCRIPT
Brief Introduction
Fired Brick
Autoclaved Brick
§6.2 Wall Bricks§6.2 Wall Bricks
Fired Brick
Fired Common Brick
Fired Hollow Brick
Fired Porous Brick
Limit to use
•small size •heave weight•energy inefficiency •lots of soil consumption
Fired Common Brick
Fired common brick is small size, heave weight, energy inefficiency and lots of soil consumption. So, it is used under strict regulations now.
Technical standard: GB 5101-2003
Appearance, size, strength, weathering-resistance must meet its demands
Strength Grade
It can be divided into five grades according to fave and fk or fmin
fk= fave-1.8S
Fired Common Brick
FormulaFormula
f
sδ
210
1
)(9
1
i
ifS f
variable coefficientvariable coefficient
standard deviationstandard deviation
Fired Common Brick
Permit to use
Fired Hollow Brick
Fired Porous Brick
light- weightlight- weight
Contain less clayContain less clay
Fired porous brick and hollow brick are light weigh and contain less clay. So, they are permitted to use now.
It is fired, mainly made up of clayHole rate is 15% at least It has many tiny holes hole and pressed side are vertical
By appearance, size,Strength grades , durability
Top-rate
First-rate
Qualified-rate
• Technical standard: GB 13544 -2000• By appearance, size, strength grades, durability• It is classified into: top-rate, first-rate and qualified-rate
Mu7.5
Mu10
Mu15
Mu20
Mu25
Mu30
By compressive By compressive
strength, strength,
flexural loadflexural load
• By compressive strength and flexural load• It is classified into 6 strength grades(Tab.6.2.1)
Tab. 6.2.1 Strength Grades of Fired Porous Brick
product grades
strength grade
compressive strength（ MPa ）
flexural load（ KN ）
the minimu
m of average value
the minimum
of minimum value of single
the minimu
m of average value
the minimum
of minimum value of single
top-rate
30 30.0 22.0 13.5 9.0
25 25.0 18.0 11.5 7.5
20 20.0 14.0 9.5 6.0
first-rate
15 15.0 10.0 7.5 4.5
10 10.0 6.0 5.5 3.0
qualified-rate
7.5 7.5 4.5 4.5 2
Applications
Fired porous brick can be usedFired porous brick can be used
in load-bearing structure below six floors.in load-bearing structure below six floors.
Fired Hollow BrickThe process and material are
the same with the above one.Hole rate is 35% at least It has
little big holeshole and pressed side are parallel
1-Tip Side, 2-Large Side, 3-Bar Side,
L-Length,
b-Width,
d-thickness
4-Rib,
5-Concave-line Slot,
6-Ektexine
1100 900
800
Apparent
Density
• Technical standard: GB 13545 -2003• By apparent density• It is classified into: 800, 900 and 1100
Strength Grades
• Technical standard: GB 13545-2003
• By compressive strength average value of large side, bar side and minimum value of single
• It is classified into three strength grades: 5.0, 3.0 and 2.0.
Product Grades
• Technical standard: GB 13545 -2003
• By appearance, size, strength grades, durability
• It is classified into: top-rate, first-rate and qualified-rate(Tab.6.2.2)
Tab.6.2.2 Strength Grades of Fired Hollow Brick
Product Grades
Strength
Grades
Compressive Strength of Large Area （ MP
a ）
Compressive Load of Bar Area
（ MPa ）
the minimu
m of average value
the minimum
of minimum value of single
the minimu
m of average value
the minimum
of minimum value of single
Top-rate 5.0 5.0 3.7 3.4 2.3
First-rate 3.0 3.0 2.2 2.2 1.4
Quanlified-rate
2.0 2.0 1.4 1.6 0.9
Applications
Fired hollow brickFired hollow brick can be used in can be used in non-load-bearing wall, such asnon-load-bearing wall, such as
interior partition of multi-layer structure filling-wall of frame structure