FORMS FOR SPECIFICATIONS, ETC., FOR ROAD MATERIALS. 15 
Per cent. 
Passing (the largest size selected) inch screen 
and retained on (the second largest size 
selected) inch screen to 
Passing (the second largest size selected) inch 
screen and retained on (^_e jhird [..largest 
size selected) inch screen to 
♦Passing, etc 
Slag shall be sampled for quality and grading in accordance Method of sam- 
with the method described on page , paragraphs , of pling. 
these specifications. 
Tests of the physical properties and grading of the slag shall be Methods of 
made in accordance with the methods described or referred to on testing, 
pages of these specifications, tests Nos. 
SPECIFICATION FOR BROKEN SLAG FOR COARSE AGGREGATE FOR PORTLAND- 
CEMENT CONCRETE BASE. 
The broken slag aggregate shall consist of fragments of air-cooled General. 
X|^^..\ty^ n ^^raU£) slag, nonglassy in character, which shall 
have been exposed to the weather for a period of at least f 
prior to use. It shall be clean, hard, tough, and durable, free 
from soft, thin, elongated, or laminated pieces, and shall contain 
no vegetable or other deleterious matter. 
The slag shall meet the following requirement: Physical prop- 
Weight per cubic foot not less than pounds. 
The broken slag aggregate shall be graded from coarse to fine, Grading. 
and when tested by means of laboratory screens shall meet the 
following requirements : 
Per cent. 
Passing inch screen 100 
Passing inch screen not more than 
The slag shall be sampled for quality and grading in accordance Method of sam- 
with the method described on page , paragraphs , p ing * 
of these specifications. 
The tests of the physical properties and grading of the slag Methods of 
shall be made in accordance with the methods described or re- es mg ' 
f erred to on pages of these specifications, tests Nos. 
SPECIFICATION FOR GRANULATED SLAG FOR CUSHION. 
The granulated slag shall consist of clean, sharp, gritty parti- General, 
cles of water-cooled S 1 ^ 1 }..^^.^}^^! slag, all of which shall 
pass a inch laboratory screen. 
The granulated slag shall be sampled for quality and size in Methods of 
accordance with the method described on page , paragraphs JJJJ^J s a n d 
, of these specifications; and the tests of its size shall be 
made in accordance with the method described or referred to on 
page of these specifications, test No. 
* The number and sizes of screens and sieves may be continued as de- 
sired by the engineer. For 10-mesh sieve and finer the wording should be : 
Passing mesh sieve and retained on mesh sieve, to 
The last requirement should be : Passing inch screen 
(or mesh sieve) not more than (or, not less than) 
t The conference recommends that the words " one year " be inserted. 
grading. 
