1. Update on the current APT Project in Texas

2. First APT Project TxDOT – RAP & RAS content in recycled mixes

3. TxDOT project
0-6682
Validation of the Maximum Allowable Amounts of Recycled Binder, RAP & RAS Using APT /01/2012 to 4/31/2014
0-6823
Testing of RAP & RAS Experimental Pavement Sections 8/01/2014 to 8/31/2015
Objectives
Validate the performance of mixes containing the maximum allowed percentage of RAP and/or RAS from Special Provisions 341—024 and 340—003.

4. N Layout of the Experimental Sections Section C Section F Section B
TRAILER
10ft
Saw cuts
Section C
Section F
Reflection
Cracking
4 x 8 = 32ft
Section B
Section E
Rutting
Section A
Section L
Fatigue
Cracking
Section D
Section G
Section H
Section J
10ft
Instrumentation
Boxes
Section I
Section K
75ft
75ft
NOTE: Not
Drawn to scale

5. BMD = Balanced Mix Design
HMA Mixes
Test
Section
Reflection Cracking
Fatigue Cracking
Surface
2.0 in.
Intermediate
Base
8.0 in.
2 in.
8.0 inch
Subbase A
Type D
Type C
Cement (3.5%) Treated Base L
Bridgeport
Rock
Cement (2.0%) Treated B
High RAP E C
RAP&RAS F D
BMD G
Rutting Experiment
Type D – contains no RAP
High RAP = (19% RAP)
RAP&RAS = (15%RAP + 3%RAS)
BMD = Balanced Mix Design
Type B and C mixes may or may not contain RAP
These mixes and designs are subject to modification based on PMC review
6.0 in.
7.0 in. H
Type B I J K

6. Permanent Deformation – Section G

7. Permanent Deformation – Section L

8. Cracking – Section G Date: 4/23/2014 Passes: 320K8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 CL CL
Number of squares with cracks =37
% Cracked Area =31%

9. Cracking – Section G Date: 5/2/2014 Passes: 416K8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 CL CL
Number of squares with cracks =60
% Cracked Area = 51%

10. Cracking – Section G Date: 5/2/2014 Passes: 416K

11. Cracking – Section L Date: 4/23/2014 Passes: 320K CL CL 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Number of squares with cracks = 0
% Cracked Area = 0%

12. Cracking – Section L Date: 5/2/2014 Passes: 416K CL CL 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Number of squares with cracks =26
% Cracked Area = 22%

13. Permanent Deformation – Section J

14. Permanent Deformation – Section K

15. N Layout of the Experimental Sections Section C Section F Section B
TRAILER
10ft
Saw cuts
Section C
Section F
Reflection
Cracking
4 x 8 = 32ft
Section B
Section E
Rutting
Section A
Section L
Fatigue
Cracking
Section D
Section G
Section H
Section J
10ft
Instrumentation
Boxes
Section I
Section K
75ft
75ft
NOTE: Not
Drawn to scale