Evaluation of Nu MIXER Rejuvenator in High RAP

Evaluation of Nu. MIXER® Rejuvenator in High RAP Mixes Krishna Srinivasan www. sripath. com info@sripath. com +1. 201. 721. 7562 +1. 201. 604. 7444 Fax Exhaustively Evaluated by Central Road Research Institute, CSIR December 2019 March 2020 © 2020 Sripath Technologies, LLC®

Nu. MIXER® The product of an 18 -month intensive research effort, Nu. MIXER® is a bio-oil blend designed for efficacy, permanence and ease of use in roofing and paving bitumen formulations. A product of prime, “GREEN” ingredients only, Nu. MIXER® has a very low odor. Nu. MIXER® helps rejuvenate high RAP paving mixes, improves low temperature properties (stiffness, stress relaxation, compliance and fatigue) and reduces viscosity in formulations. It is compatible with a wide variety of bitumen and additives commonly used in paving formulations and contributes to the stability of polymer modified bitumen formulas. This liquid product is suitable for all Bitumen Plants, Hot Boxes, IR Heating Units and Recyclers and has found use in Hot Mixes, Emulsions, Scrub, Fog and Chip Seals. Nu. MIXER ® is a freeflowing liquid at ambient conditions. March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes • Quality of Mixes beyond ~25% RAP is problematical due to the aged and brittle bitumen in the RAP • Rejuvenators are used in the mix to restore the functionality of the aged bitumen to required specifications • Nu. MIXER® by Sripath Technologies, LLC® is: • • • An all-natural rejuvenator derived from prime ingredients with no animal fats or greases Compatible with all bitumen Rapidly penetrates and rejuvenates aged and brittle bitumen in RAP Improves low temperature performance Easy to use and highly stable at mix/use/storage temperatures March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes Separate & characterize the bitumen in the RAP Measure properties of this bitumen with varying amounts of rejuvenator Determine proportions of RAP (bitumen), rejuvenator & virgin bitumen for different levels of RAP in the final mix Test mix design(s) & determine optimal RAP content March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes Separate & characterize the bitumen in the RAP Measure properties of this bitumen with varying amounts of rejuvenator Determine proportions of RAP (bitumen), rejuvenator & virgin bitumen for different levels of RAP in the final mix Test mix design(s) & determine optimal RAP content 3. 5% binder in the RAP True High Temperature Grade of 110 °C March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes Effect of Nu. MIXER® on Recovered Binder Grade True Grade °C Separate & characterize the bitumen in the RAP Determine proportions of RAP (bitumen), rejuvenator & virgin bitumen for different levels of RAP in the final mix Measure properties of this bitumen with varying amounts of rejuvenator Test mix design(s) & determine optimal RAP content 110 105 100 95 90 85 80 75 70 0 2 4 % Nu. MIXER® in Recovered Binder 6 March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes • • Total binder in mix: 5. 4% Binder grade: VG-40 RAP: 3. 5% Binder, Graded at 110 °C RAP & virgin aggregate characterization Required amount of Nu. MIXER® (%) Separate & characterize the bitumen in the RAP Determine proportions of RAP (bitumen), rejuvenator & virgin bitumen for different levels of RAP in the final mix Measure properties of this bitumen with varying amounts of rejuvenator Test mix design(s) & determine optimal RAP content Required amount of Nu. MIXER® in bitumen at various levels of RAP 6 4 2 0 0 20 % RAP 40 60 March 2020 © 2020 Sripath Technologies, LLC®

CSIR-Central Road Research Institute Evaluation of Nu. MIXER® in High RAP Mixes Separate & characterize the bitumen in the RAP • • • Measure properties of this bitumen with varying amounts of rejuvenator Determine proportions of RAP (bitumen), rejuvenator & virgin bitumen for different levels of RAP in the final mix Test mix design(s) & determine optimal RAP content RAP & virgin aggregate characterizations Marshall method of mix design Pavement requirements: BC-2 Mix Total binder in mix: 5. 4% Initial mix design for optimal bitumen content Test and modify designs to meet road requirements © March 2020 Sripath Technologies, LLC®

CSIR-Central Road Research Institute Marshall Stability % Nu. MIXER® Marshall Stability (k. N) Flow (mm) Base System, No RAP 0% • Optimal mix design • • 17. 0 k. N Marshal Stability 3. 5 mm Flow 3. 8% Air Voids 72% VFB 17. 0 3. 5 20% RAP 0% 19. 0 3. 4 3% 18. 2 3. 5 40% RAP 0% 20. 8 4. 1 3. 5% 20. 0 4. 3 60% RAP 0% 26. 9 3. 7 5% 20. 1 3. 8 March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Moisture Stability (Stripping Test) % Nu. MIXER® Dry Tensile Strength (Mpa) Conditioned Tensile Strength (Mpa) Tensile Strength Ratio (%) 20% RAP 0% 1. 670 1. 469 88 3% 1. 580 1. 422 90 40% RAP 0% 1. 975 1. 628 82 3. 5% 1. 660 1. 477 89 60% RAP 0% 2. 124 1. 720 81 5% 1. 662 1. 517 91 March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Hamburg Wheel Tracking Test (Rutting Resistance) % Nu. MIXER® Average Rut Depth (mm) 40% RAP 0% 2. 8 3. 5% 4. 3 60% RAP 0% 1. 4 5. 0% 2. 1 March 2020 © 2020 Sripath Technologies, LLC ®

CSIR-Central Road Research Institute Texas Overlay Test (Fatigue Resistance) % Nu. MIXER® Average Number of Cycles to Failure 40% RAP 0% 32 3. 5% 70 60% RAP 0% 41 5. 0% 240 March 2020 © 2020 Sripath Technologies, LLC ®

Nu. MIXER® Provides: • The use of higher RAP mixes at lower cost • Reduced virgin bitumen requirements in the mix • An excellent balance of mix properties • • Outstanding fatigue and fracture resistance Acceptable rutting Outstanding moisture resistance Reduced mix stiffness and provides excellent compatibility for pavement laydown March 2020 © 2020 Sripath Technologies, LLC ®

Innovative Solutions Excellence through Technology • Sripath Technologies® is established as knowledgeable, reliable and capable • Multiple Paths to Results • • Reduced cost of manufacturing products with no compromise in properties or quality Improved reliability through secure and on-time supply of key raw materials Development of new ideas Leading edge R&D thinking & capability • Multiple Channels for Roofing & Paving • Intimate knowledge of the industries and its processes • Sripath Technologies® members have bought and sold in the marketplace for past two decades • Sripath Technologies® has addressed quality issues with bitumen & additives • Sripath Technologies® members are well recognized by key members of the bitumen community March 2020 © 2020 Sripath Technologies, LLC ®

Connect with us! Visit us: www. sripath. com info@sripath. com Head of Sales – India Region Sripath. Technologies Sripath Technologies, LLC® sripathtechnologies D-411, Dheeraj Uphar company/sripath/ (Near Vasant Valley Complex) Sripath. T Sripath Technologies, LLC Email Sripath: Sachin Raje Malad (East), Mumbai 400097, INDIA Phone : +91 98211 33845 Sachin@Goldwin. Holdings. com sachin_1963@yahoo. co. in March 2020 © 2020 Sripath Technologies, LLC ®