Figure
7. Description of pouring device ........................................................................................
6
8. Effect of aggregate type on specific rugosity ...............................................................
6
9. NAA particle shape and texture void contents vs. percent natural sand in fine
aggregate ......................................................................................................................
7
10. Test apparatus for ASTM C 1252 and modified ASTM C 1252 .................................
8
11. Modified NAA particle shape and texture and void contents ..................................
8
12. QMOT time index test apparatus ..................................................................................
9
13. Road surfacing textural characteristics .........................................................................
10
14. Correlation between macrotexture, microtexture, skid resistance, and speed .......
10
15. Pavement surface characteristics ...................................................................................
11
16. Effect of pavement texture on skid resistance ..............................................................
11
17. Containers of test materials for sand patch test ..........................................................
12
18. Circular patch of test material ........................................................................................
12
19. Measurement of diameter of sand patch ......................................................................
12
20. British portable skid resistance tester ............................................................................
13
21. Relationship between British pendulum number and Illinois skid trailer number ...
14
22. Correlation between variable-speed number and skid trailer number at 40 mph .....
14
23. British wear and polishing device .................................................................................
15
24. Water projection device ...................................................................................................
16
25. Specimen for projection method ....................................................................................
16
26. Correlation between on-road British pendulum number and polishing by
projection coefficient Cpp ............................................................................................
17
TABLE
Table
1. Recommended aggregate tests ....................................................................................... 1
iv
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