INDEX ACCORDING TO TYPE OF ROAD. 



In this report the specifications have been grouped according to the types of mate- 

 rials covered. The following index has been prepared for the convenience of engi- 

 neers who may be particularly interested in individual types of construction. In this 

 index all specifications relating to each type of pavement are grouped together. 



Semi-gravel, top soil, or sand clay: p age. 



Aggregate for road surfacing 18 



Waterbound roads: 



Gravel 16 



Broken slag 13 



Broken stone 5 



Bituminous materials for cold application: 



Road oil 22 



Tar 24 



For covering see "Chips or No stone (or slag)" under specifi- 

 cations for bituminous macadam, broken stone, or broken slag. 



Bituminous materials for hot application: 



Road oil 22 



Refined tar 25 



For covering see "Chips or No stone (or slag)" under specifi- 

 cations for bituminous macadam, broken stone, or broken slag. 



Bituminous macadam: 



Broken slag 14 



Broken stone 5 



Asphalt cement 23 



Refined tar 25 



Large aggregate bituminous concrete: 



Gravel aggregate 17 



Broken slag aggregate 14 



Broken stone aggregate 6 



Mineral filler 21 



Broken stone or sand, coarse and fine aggregate 7 



Asphalt cement 23 



Refined tar 25 



For covering see "Chips or No stone (or slag) " under specifica- 

 tions for bituminous macadam, broken stone, or broken slag. 



TOPEKA TYPE BITUMINOUS CONCRETE: 



Broken stone or sand, coarse and fine aggregate 8 



Mineral filler 21 



Asphalt cement 23 



Sheet asphalt: 



Sand 19 



Mineral filler 21 



Asphalt cement 23 



Binder course not specifically covered by the conference (broken stone 

 aggregate for large aggregate bituminous concrete could be used). 



PORTLAND-CEMENT CONCRETE BASE; 



Portland cement 25 



Broken slag for coarse aggregate 15 



Broken stone or gravel for coarse aggregate 9 



Stone or gravel screenings for fine aggregate 10 



Sand for fine aggregate 19 



Portland cement concrete wearing surface: 



Portland cement 25 



Gravel for coarse aggregate 19 



Broken stone for coarse aggregate 9 



Combination of dustless screenings and sand for fine aggregate 11 



Sand for fine aggregate 20 



Steel reinforcing rods 28 



Portland-cement concrete (suggested clauses) 27 



Asphalt cement for use as poured joint filler 23 



Refined tar for use as poured joint filler 25 



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