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GRADE OF BRICK.

AVERAGE TOTAL %
Loss of Two

CROSS
CHARGES AT END OF PER CENT BREAK- ORUSHING

ABSORP- ING STRENGTH

TION STRÄNGTH PER SQ. IN.
450 900 1350 1800

PER 8Q.IN
Rev. Rev. Rev. Rev.

SIZE OF
BRICK IN
CENTI-
METERS

[blocks in formation]

18.5 29.5 38.4 46.2 8.9 to 12.0 690 to 1370 11.3 17.5 21.2 24.6 2.1 to 4.1 830 to 2810 3600 to 4870 12.7 19.0 22.5 24.9 0.5 to 1.7 1860 to 2550 3000 to 6420 11.1 18.0 24.1 26.4 0.2 to 1.2 2070 to 3060 2670 to 4280

22 5x10.5x8

21x9.5x8 21x9.5x8 21x9.5x8

66

Soft.
Alley.
No. 1 paver.
Overburned.
Soft Burned.
Alley
No. 1 paver.
Overburned.

Alton,

Vitrified paving brick

[ocr errors]

17.4 28.6 40.0 46.1 8.0 to 12.6 13.3 21.5 28.2 93.9 4.0 to 7.2 1240 to 1960 2820 to 5070 8.4 11.5 11.1 15.8 0.5 to 1.0 2080 to 3100 5600 to 10800 9.4 16.2 21.8 27.0 0.8 to 1.5 1200 to 1680

22x10x7 21.5x9.5x7 21.5x9.5x7

Atchis

[blocks in formation]

Barra

[ocr errors]

oa

21x9.5x8.5

Soft
Alley.
No. 1 paver.
Overburned

14.5 10.2 10.3 9.1

20.9 25.4 29.5 6.4 to 8.3 1379 to 1959 1860 to 10000 15.4 19.0 21.8 0.8 to 1.2 2200 to 2810 8360 to 17700 13.9 16.7 18.4 0.5 to 1.1 1840 to 2580 8900 to 13500 14.5 18.7 22.0 0.7 to 1.0 2520 to 3460 6780 to 10300

21x10x8

Brazil

Soft.
Alley.
No. 1 paver.
Overburned.

28.9 13.6 13.5 14.5

45.1 20.1 20.1 23.5

56.8 67.1 11.1 to 16.3 255 to 1080 25.3 29.8 1.6 to 4.2 1280 to 1980 24.5 28.1 1.7 to 1.9 1966 to 2540 30.8 36.7 2.0 to 3.5 550 to 1260

24xllx8.5

23x10x8 22.5x10x8 23.5x10.5x8

Janey

97

17 3 22.0 25.7 2 2 to 4 5 1090 to 3000

22 5x10.5x6.5

Olinton, Ind.

Soft
Alley.
No. i paver..
Overburned

16.1 26.0 33.6 41.6 6.1 to 14.0 945 to 1630 1440 to 5000 14.5 22.7 29.0 34.7 5.7 to 9.1 1000 to 1470 12.9 19.6 26.2 31.5 1.0 to 2.5 925 to 2040 4050 to 7800 14.4 21.6 27.5 31.6 0.9 to 1.4 530 to 3350 4740 to 5900

24.5xllx9 23.5x10.5x8.8 23.5x10.5x8.5 23.5x10.5x8.5

Doffeyville, Kan.

Brick...

21x10x5.5

13.7 0.0 to 1.6 1918 to 2844 5000 to 7300
5.6 8.5 10.9 12.8

15.01.

No. 1 block.

21x10x8

[graphic][ocr errors][merged small][merged small][merged small][merged small]
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