by Shahriar Abubakri  , Gilson R. Lomboy  and Douglas B. Cleary

Received: 10 February 2026;  Published: 15 June 2026;  doi: 10.21926/rpm.2602004

The use of recycled concrete aggregate (RCA) offers a sustainable alternative to traditional virgin aggregates in concrete production, helping mitigate the environmental impacts associated with mining and construction waste disposal. RCA is characterized by the presence of attached mortar from previous concrete applications, which significantly influences the mechanical properties of the aggregates, as well as mix design and the overall performance of new concrete incorporating these recycled ma [...]

by Ali A. Al-Allaq  , Abdullah A. Abdulhakeem  , Jwan Kh. Hammood  and Hassan Fouad

Received: 03 December 2025;  Published: 07 April 2026;  doi: 10.21926/rpm.2602003

The cartilage is avascular and has limited regenerative capacity, posing a significant clinical challenge. Conventional treatments often do not restore hyaline cartilage, leading to progressive osteoarthritis. Recent advances in tissue engineering have focused on integrating biomaterials, stem cells, growth factors, and gene-delivery approaches. In addition, in vivo models serve as critical platforms for translational validation. Biomaterial scaffolds, including polycaprolac [...]