Advancing Concrete Sustainability through Recycling
The goal of material recycling in construction has opened new possibilities for new materials of innovative uses of recycled fines for high value-added applications, including foam concrete that is a low-density controlled low-strength material (LD-CLSM).Due to the high porosity, this material usually has a strength range of 0.2 to 10 MPa, while this untraditional property leaves it a highly crushable nature.A good potential is using foam concrete with recycled fines to make Engineered Material Arresting System (EMAS) for airport runway safety.As such, it is highly needed to characterize the crushing energy and find its material determinants.In this work, several testing approaches have been proposed to fulfill this goal.The basic crushing behavior of foam concrete from 0.4 to 0.8 g/cm3 is investigated using a penetration test.To characterize the void structure on the microstructural level, the geometric features of the actual 3D void structure are characterized using micro-CT.A digital image correlation (DIC) test is used to assist the study on material deformation under indentation.Based on the experimental results, two material failure mechanisms, volume collapse and shear, are proposed to explain the energy dissipation of foam concrete indentation.With the aid from the advanced testing techniques, both the modes are qualitatively correlated to the evolvement of the energy consumption at different stages of foam concrete crushing.
foam concrete cellular material crushing energy dissipation
Yu Song David A.Lange
Dept.of Civil and Environmental Engineering, University of Illinois, Urbana, IL, US
国际会议
福州
英文
9-14
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）