{"id":968,"date":"2026-07-25T01:55:25","date_gmt":"2026-07-25T01:55:25","guid":{"rendered":"http:\/\/localhost:8081\/soyleitechnologies\/sip-1111-university-park-illinois-high-recycled-content\/"},"modified":"2026-08-01T13:44:06","modified_gmt":"2026-08-01T13:44:06","slug":"sip-1111-university-park-illinois-high-recycled-content","status":"publish","type":"post","link":"https:\/\/soylei-dev.ecochran.dyndns.org\/soyleitechnologies\/sip-1111-university-park-illinois-high-recycled-content\/","title":{"rendered":"University Park, Illinois: 600 Tons of SIP-1111\u2122 High-Recycled-Content Asphalt"},"content":{"rendered":"

On November 19, 2020, Gallagher Asphalt produced a full-scale Illinois demonstration for placement at 200 Applied Parkway in University Park. The production run delivered approximately 600 tons of SIP-1111\u2122-treated mix<\/strong> within a 740-ton control-and-demonstration sequence.<\/p>\n

Turning a 58-28 binder into a high-recycled-content design<\/h2>\n

The demonstration paired a 58-28 base binder with 5% SIP-1111\u2122, approximately 35\u201336% RAP, and 5% RAS. The comparison used the producer’s 46-34 control design with the same recycled-material loading.<\/p>\n

Iowa State University’s extracted-binder results graded the SIP-1111\u2122 design at PG 70-16<\/strong>, compared with PG 70-10<\/strong> for the control. The treated design expanded the overall recovered-binder PG range from 90.2\u00b0C to 93.2\u00b0C<\/strong> while maintaining the same PG 70 high-temperature grade. Its \u0394Tc improved from -15.3\u00b0C to -11.4\u00b0C<\/strong>.<\/p>\n

Cracking and rutting performance<\/h2>\n

ISU measured an IFIT index of 18.8<\/strong> for the SIP-1111\u2122 design versus 13.6<\/strong> for the control. CT Index measured 189.5 versus 193<\/strong>, while DCT fracture energy measured 515 versus 559 J\/m\u00b2<\/strong>.<\/p>\n

Chicago Testing Laboratory measured 9.0 mm of Hamburg rut depth<\/strong> at 20,000 passes for the SIP-1111\u2122 mix, compared with 11.81 mm<\/strong> for the control. CTL’s IFIT results favored the control at both the initial and long-term conditions, showing the cracking response changed with laboratory and conditioning protocol.<\/p>\n

ISU’s preliminary quality-control record identified specimens outside its specified air-void limits for replacement before the testing summary was finalized. The ISU and CTL values above remain separated by laboratory and conditioning protocol.<\/p>\n

What University Park demonstrates<\/h2>\n

The University Park project moved a lower-temperature 58-28 base binder into a PG 70-16 recovered-binder range while carrying approximately 35\u201336% RAP and 5% RAS. It combined a stronger ISU IFIT result with lower CTL Hamburg rut depth and full-scale production at approximately 600 treated tons.<\/p>\n

\n \"Six\n <\/picture>
University Park source-separated laboratory results<\/strong> The laboratories reported mixed outcomes across cracking and rutting measures, demonstrating why the result set must be read test by test.<\/figcaption><\/figure>\n
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Higher cracking indices and lower Hamburg rut depth are favorable; ISU and CTL conditions are not merged.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
University Park treated and control results, separated by testing laboratory.<\/caption>\n
Laboratory<\/th>\nMetric<\/th>\nTreated<\/th>\nControl<\/th>\nUnit<\/th>\n<\/tr>\n<\/thead>\n
ISU<\/th>\nI-FIT<\/td>\n18.8<\/td>\n13.6<\/td>\nindex<\/td>\n<\/tr>\n
ISU<\/th>\nCT Index<\/td>\n189.5<\/td>\n193<\/td>\nindex<\/td>\n<\/tr>\n
ISU<\/th>\nDCT<\/td>\n515<\/td>\n559<\/td>\nJ\/m\u00b2<\/td>\n<\/tr>\n
CTL<\/th>\nHamburg<\/td>\n9<\/td>\n11.81<\/td>\nmm<\/td>\n<\/tr>\n
CTL<\/th>\nInitial I-FIT<\/td>\n9.7<\/td>\n11.7<\/td>\nindex<\/td>\n<\/tr>\n
CTL<\/th>\nLong-term I-FIT<\/td>\n2<\/td>\n5.5<\/td>\nindex<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n

Source: SIP-1111 Demo Paving Results<\/a>. Slide 20 ISU table and slide 22 CTL table<\/p>\n<\/div>\n

Review SIP-1111\u2122<\/a> \u00b7 See related demonstration projects<\/a> \u00b7 Discuss a high-recycled-content mix with SoyLei<\/a><\/p>\n

Source Documents<\/h2>\n