SPECIFICATIONS FOR NONBITUMINOUS ROAD MATERIALS. 
be specified by the purchaser. At least 10 days from the time of sam- 
pling shall be allowed for the completion of the 7-day test; and at least 
31 days shall be allowed for the completion of the 28-day test. The 28-day 
test shall be waived only when specifically ordered. 
~ V. REJECTION. 
(12) The cement may be rejected if it fails to meet any of the re- 
quirements of these specifications. 
(13) Cement shall not be rejected on account of failure to meet the 
fineness requirement if, upon retest after drying at 100° C. (212° F.) 
for one hour it meets this requirement. 
(14) Cement failing to meet the test for soundness in steam may be 
accepted if it passes a retest using a new sample at any time within 28 
days thereafter. 
(15) Packages varying more than 5 per cent from the specified weight 
- Imay be rejected; and if the average weight of packages in any ship- 
ment, as shown by weighing 50 packages taken at random, is less than 
that specified, the entire shipment may be rejected. 
Bejection. 
The cement shall be tested in accordance with the following methods: Methods of 
Tests for Portland cement, A. S. T. M. Standard, C9-17. 
This is the United States Government specification for Portland 
cement, as described in Bureau of Standards Circular No. 33. It 
is also Standard Specification C9-17 of the’ American Society for 
Testing Materials. It is intended to apply wherever Portland 
cement ig used. 
SPECIFICATION Br-1. 
Vitrified Paving Brick, Cushion Sand, and Grouting Sand for Brick 
; Pavement. 
VETRIFIED PAVING BRICK. 
All brick shall be of a size commercially known as four-inch brick. 
They shall be thoroughly annealed, tough and durable, regular in size and 
shape, and evenly burned. When broken, the brick shall show a dense, 
stonelike body, free from lime, air pockets, cracks, or marked laminations. 
Kiln marks shall not exceed #$, of an inch, and the wearing surface shall 
show but slight kiln marks. 
Representative samples of the brick shall meet the following require- 
ments when subjected to the rattler test: 
Average loss by abrasion on one or more samples, not more than 22 per 
cent, 
Maximum difference in per cent loss by abrasion when more than one 
representative sample is tested, not more than 8 per cent, provided, 
however, that no sample shall show more than 24 per cent loss. 
A maximum of three tests may be used as a basis for rejection. 
The brick shall meet the following requirements: 
Inches. 
BRE Ba Ee ee eee ae Bn Ma gk SREY EEE IE ec wn ae ts 834 to 93 
BV AT Cities mecca rcaae Week the hid: SUPLRS Wy seal ees RARE Ald ao eS kd 34 to 3% 
LOY Oa ge Pee a a oe me re ee eT SE 3z to 4% 
Variations among brick from a single plant shall not exceed the fol- 
lowing limits: 
Inch. 
YTS USER, AA SD ANG etal ee age ees 3 
Waist at] O nei nrcvyl Ot hte ee ea See A ee ee 3 
WAT atlOuornegeD thse one ee eee ee ee ee 8 
Testing. 
General. 
Rattler Test. 
Dimensions. 
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