Akademik Veri Yönetim Sistemi
TURKISH JOURNAL OF CIVIL ENGINEERING, cilt.34, sa.6, ss.53-79, 2023 (SCI-Expanded)
Reclaimed asphalt pavements (RAP); has economic and environmental advantages. It is advantageous in terms of reducing greenhouse gas emissions and bitumen requirement, being completely recyclable, reducing waste storage, protecting raw material resources, and diversity of use. With sustainability approaches, it is increasingly used in wear layers. With these objectives, wearing layer designs with 50% RAP for field studies were produced for Turkey. As an additive materials; compatibilizer hydrated lime (HL) and diatomite (D) were used at much lower values than the common usage rates with SBS. It was aimed to obtain guaranteed improvement of RAP mixtures with HL and D in terms of water damage and rutting. Using of diatomite is one of the innovative issues for both Turkey and the world. 510% ratios of D were used separately for the constant HL-SBS content. AASHTO T283 Modified Lottman and Hamburg rutting tests were performed. Mixtures with 50%RAP added became more resistant than the original mixtures with the selected additives. It is seen that the modified Lottman test is distinctive for mixtures with D, HL, SBS and RAP and reflects the performances successfully. Increased water damage resistance at a constant low HL ratio with the increasing the D ratio from 5% to 10% indicate that HL and D together can produce performance improvement. HL+SBS compliance provides higher water damage resistance. SBS works in harmony with both HL and D. Low HL-D rates and widespread use of 5%SBS provides very high improvement in water damage resistance in mixtures with 50%RAP. The fact that all 50%RAP modified mixtures gave higher rutting resistance than control mixtures shows that these mixtures can be used successfully in practice.