Simulation on the Micro-Deval test for the aggregate wear properties measurement. (20th August 2018)

• Record Type: Journal Article
• Authors: Wu, Jiangfeng; Wang, Linbing; Hou, Yue; Qian, Zhenyu; Meng, Lingjian; Zhao, Qian
• Is Part Of: Construction & building materials. Volume 180(2018)
• Page Start: 445
• Page End: 454
• Publication Date: 2018-08-20
• Subjects: Micro-Deval test -- Virtual abrasion value -- Aggregate density -- Finite element simulation; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.03.264
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: A new Evaluation method on aggregate performance is proposed. The Micro-Deval test was used to analyze the wear resistance of five different aggregates. FEM is used to simulate the aggregate wear properties by using the real aggregate 3D model. Abstract: In this study, a simulation on the Micro-Deval test was presented for the aggregate wear properties measurement. The performance parameters including wear resistance, density, elasticity and Poisson ratio of the five kind aggregates were obtained by tests on red sandstone, basalt, limestone, quartzite and gneiss. The modified Micro-Deval test was adopted to analyze the wear resistance of five different aggregates according to the American Society for Testing and Materials (ASTM) standards. It was found that the Micro-Deval abrasion value increased exponentially rather than linear growth with the increase of the rotation times. The CoreLok multi-function aggregate density test equipment was adopted to measure the aggregate apparent density. The modulus of elasticity and Poisson ratio were measured by uniaxial compression test. All the test results provided accurate data support for aggregate virtual wear simulation. The aggregate 3D model, roller, balls, water and air models were built in ABAQUS software. Mohr Coulomb plasticity failure criterion was adopted in the simulation of Micro-Deval abrasion test. The calculation method of virtual abrasion value was proposed, and the simulation results of abrasion value were in line with the test result. It provided a new approach for the evaluation of aggregate anti-wear performance which had higher repeatability and controllability than the actual test.