Collection of selected, peer reviewed papers from the 15th International Conference on Non-Conventional Materials and Technologies NOCMAT, November 23-25, 2014, Pirassununga, Brazil. The 51 papers are grouped as follows: Chapter 1: Natural Fibers, Bamboo and Plant-Based Materials; Chapter 2: Non-Conventional and Innovation Research and Technology; Chapter 3: Construction Materials and Technologies for Sustainability, Energy Efficiency, Affordable Housing; Chapter 4: Recycling of Industrial Materials, Agricultural and Urban Waste. Keywords: Natural Fibers, Plant-based Materials, Construction Materials, Recycling, Agricultural Waste, Urban Waste. Review from Ringgold Inc., ProtoView: Editors Ghavami, Sastano, and Fiorelli present students, academics, researchers, and professionals working in a wide variety of contexts with a collection of peer-reviewed academic papers selected from research presented at the fifteenth International Conference on Non-Conventional Materials and Technologies held in November of 214 in Brazil. The editors have organized the contributions that make up the main body of the text in four parts devoted to natural fibers, bamboo, and plant-based materials, non-conventional and innovative research and technology, and a wide variety of other related subjects. Ringgold Subjects: Engineering, Materials science, Sustainability.