1. Brief Introduction Fired Brick Autoclaved Brick §6.2 Wall Bricks

2. Fired Brick Fired Common Brick Fired Hollow Brick Fired Porous Brick

3. 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.

4. 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 f ave and f k or f min f k= f ave -1.8S Fired Common Brick

5. Formula variable coefficient standard deviation Fired Common Brick

6. Permit to use Fired Hollow Brick Fired Porous Brick light- weight Contain less clay Fired porous brick and hollow brick are light weigh and contain less clay. So, they are permitted to use now.

7. It is fired, mainly made up of clay Hole rate is 15% at least It has  many tiny holes  hole and pressed side are vertical

8. 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

9. By compressive strength, flexural load Mu30Mu25Mu20Mu15Mu10Mu7.5 By compressive strength and flexural load It is classified into 6 strength grades(Tab.6.2.1)

10. Tab. 6.2.1 Strength Grades of Fired Porous Brick product grades strength grade compressive strength （ MPa ） flexural load （ KN ） the minimum of average value the minimum of minimum value of single the minimum of average value the minimum of minimum value of single top-rate 3030.022.013.59.0 2525.018.011.57.5 2020.014.09.56.0 first-rate 1515.010.07.54.5 1010.06.05.53.0 qualified- rate 7.5 4.5 2

11. Applications Fired porous brick can be used in load-bearing structure below six floors.

12. Fired Hollow Brick  The process and material are the same with the above one.  Hole rate is 35% at least  It has  little big holes  hole and pressed side are parallel

13. 1-Tip Side, 2-Large Side, 3-Bar Side, L-Length, b-Width, d-thickness 4-Rib, 5-Concave-line Slot, 6-Ektexine

14. Apparent Density 8009001100 Technical standard: GB 13545 -2003 By apparent density It is classified into: 800, 900 and 1100

15. 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.

16. 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)

17. Tab.6.2.2 Strength Grades of Fired Hollow Brick Product Grades Strength Grades Compressive Strength of Large Area （ MPa ） Compressive Load of Bar Area （ MPa ） the minimum of average value the minimum of minimum value of single the minimum of average value the minimum of minimum value of single Top-rate5.0 3.73.42.3 First-rate3.0 2.2 1.4 Quanlified- rate 2.0 1.41.60.9

18. Applications  Fired hollow brickcan be used in non-load-bearing wall, such as  Fired hollow brick can be used in non-load-bearing wall, such as  interior partition of multi-layer structure  filling-wall of frame structure