Brick
Bricks and stones are made by a way of moist pressing or plastic formation from clayey and siliceous (tripolite, diatomite) sedimentary rocks and industrial wastes (coal production and coal-concentrating ashes) and burnt in furnaces, are applied to laying stone and reinforced masonry external and internal walls of buildings and structures, and also for laying of foundations by solid bricks.
Key parameters and sizes
Ceramic bricks and stones are produced in a form parallelepiped and depending on sizes subdivided into types specified in the table 1.
Table 1
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Mark of products
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Strength Mpa (kgs/sm2)
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At compression
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All kinds of products
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Corpulent brick of Plastic formation
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Average for 5 samples
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The least for a separate sample
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Average for 5 samples
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The least for a separate sample
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300
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30,0(300)
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25,0(250)
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4,4(44)
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2,2(22)
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250
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25,0(250)
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20,0(200)
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3,9(39)
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2,0(20)
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200
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20,0(200)
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17,5(175)
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3,4(34)
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1,7(17)
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175
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17,5(175)
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15,0(150)
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3,1(31)
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1,5(15)
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150
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15,0(150)
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12,5(125)
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2,8(28)
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1,4(14)
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125
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12,5(125)
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10,0(100)
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2,5(25)
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1,2(12)
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100
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10,0(100)
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7,5(75)
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2,2(22)
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1,1(11)
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75
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7,5(75)
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5,0(50)
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1,8(18)
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0,9(9)
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For a brick and stones with a horizontal arrangement of emptiness
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100
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10,0(100)
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7,5(75)
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|
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75
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7,5(75)
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5,0(50)
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|
|
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50
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5,0(50)
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3,5(35)
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|
|
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35
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3,5(35)
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2,5(25)
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|
|
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25
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2,5(25)
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1,5(15)
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|
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Limiting a deviation from the nominal sizes in millimeters do not exceed:
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For products of plastic formation from loesses, tripoli, diatomaceous
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+ 7
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On length
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- 5
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On width
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for products of plastic formation and moist pressing
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+ 5
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on length
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+ 4
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on width
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+ 3
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On thickness for a brick
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+ 4
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On thickness - for a stone
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The deviation from perpendicularity of sides in millimeters does not exceed:
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+ 4 мм
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For products of plastic formation from loess-like diatomaceous
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+ 3 мм
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For products of plastic formation and moist pressing
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Frost resistance makes 15-25 cycles.
Marks of a let out brick "75", "100" and "125"
The general technical parameters for a ceramic brick, a stone of corresponding GOST - 530-95
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Mark of products
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Strength Mpa (kgs/sm2)
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At a bend
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Brick of moist pressing and hollow brick
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The increased brick
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Average for 5 samples
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The least for a separate sample
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Average for 5 samples
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The least for a separate sample
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300
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3,4(34)
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1,7(17)
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2,9(29)
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1,5(15)
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250
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2,9(29)
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1,5(15)
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2,5(25)
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1,5(15)
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200
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2,5(25)
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1,3(13)
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2,3(23)
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1,1(11)
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175
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2,3(23)
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1,1(11)
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2,1(21)
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1,1(10)
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150
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2,1(21)
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1,0(10)
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1,8(18)
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0,9(9)
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125
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1,9(19)
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0,9(9)
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1,6(16)
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0,8(8)
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100
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1,6(16)
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0,8(8)
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1,4(14)
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0,7(7)
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75
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1,4(14)
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0,7(7)
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1,2(12)
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0,6(6)
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The note:
strength at a bend define on the actual area of a brick without a deduction of the area of emptiness
strength at a bend define on the actual area of a brick without a deduction of the area of emptiness
