FORMS FOR SPECIFICATIONS, ETC., FOR ROAD MATERIALS. 
and dimension clauses and the following requirements of this 
specification.* 
The blocks shall be so dressed that when laid as specified 
measurement of any joint shall show a width of not more than 
inch for a depth of inches or a width of not more 
than inch in any part of the joint. 
The wearing surface of the blocks shall show no depressions 
' more than inch deep, and the edges and corners shall be 
unchipped and unbroken. 
Stone block shall be sampled in accordance with the methods 
described on page , paragraph , of these specifications, 
and tests of physical properties shall be made in accordance with 
the methods described or referred to on pages of these 
specifications, tests Nos. 
13 
Methods of 
sampl i n g and 
testing. 
SPECIFICATION FOR BROKEN SLAG FOR WATER BOUND MACADAM. 
The broken slag shall consist of angular fragments of 
^ n . s . e . rt .... t ^P. e ^.. al .!^^. bl . e i sla &> reasonably uniform in density and 
quality, free from metallic iron, thin or elongated pieces, dirt, or 
other objectionable matter. 
The slag shall meet the following requirements : 
Weight per cubic foot_ not less than pounds. 
Per cent of wear to 
(or French coefficient to ) 
That portion of the product of the crusher, including the dust 
of fracture, which, when tested by means of laboratory screens, 
will meet the following requirements : 
Per cent. 
Passing inch screen 100 
Total passing inch screen to 
That portion of the product of the crusher which, when tested 
by means of laboratory screens, will meet the following require- 
ments : 
Per cent. 
Passing inch screen 100 
Total passing inch screen to 
Retained on inch screen 100 
That portion of the product of the crusher which, when tested 
by means of laboratory screens, will meet the following require- 
ments : 
Per cent. 
Passing inch screen 100 
Total passing inch screen to 
Retained on inch screen 100 
The slag shall be sampled for quality and size in accordance 
with the method described on page , paragraphs , of 
these specifications. 
The tests of the physical properties and sizes of the slag shall 
be made in accordance with the methods described or referred 
to on pages of these specifications, tests Nos. . 
General. 
Physical prop- 
erties. 
Screenings or 
No. — slag. 
Top course or 
No. slag. 
Bottom coarse 
or No. — slag. 
Method of sam- 
pling. 
Methods of 
testing. 
* This sentence has been inserted as a matter of editing, in order to 
make the requirements conform in principle with the specification for 
brick recommended by the conference. 
