FORMS FOR SPECIFICATIONS, ETC., FOR ROAD MATERIALS. 



13 



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. 



SPECIFICATION FOR BROKEN SLAG FOR WATER BOUND MACADAM. 



Methods of 

 sain pi i n g and 

 testing. 



The broken slag shall consist of angular fragments of 

 (insert types allowable) slag, 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. Blag. 



Top course or 

 No. slag. 



Bottom course 

 •r 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. 



