|Table of Contents|

Parameters analysis of C80 concrete based on 2D random aggregate model(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年01期
Page:
28-37
Research Field:
建筑材料
Publishing date:

Info

Title:
Parameters analysis of C80 concrete based on 2D random aggregate model
Author(s):
WU Hongmei1; 2;  SHEN Bo1; 2;  LIU Kai1; 2;  LU Yaqin1; 2;  YANG Fang3
(1. Research Center of Space Structures, Guizhou University, Guiyang 550003, Guizhou, China; 2. Key Laboratory of Structural Engineering of Guizhou Province, Guiyang 550003, Guizhou, China; 3. School of Mining and Civil Engineering, Liupanshui Normal University, Liupanshui 553000, Guizhou, China)
Keywords:
coarse aggregate;  distribution;  shape;  content;  interface transition zone;  porosity.
PACS:
TU528.31
DOI:
10.19815/j.jace.2021.09112
Abstract:
The 2D random aggregate model of meso-concrete was established by DIGIMAT and ABAQUS. The effects of the distribution, shape and content of coarse aggregate, the performance of interfacial transition zone and porosity on the cubic compressive strength, axial compressive strength, elastic modulus and splitting tensile strength of C80 high strength concrete were simulated. The simulation results were compared with the effects of various parameters on low strength concrete. The results show that the distribution pattern of coarse aggregate has little effect on the basic mechanical properties of concrete, and the maximum relative error of compressive strength of concrete cube with different distribution patterns is 4.18%. Different coarse aggregate shapes have different effects on the mechanical properties of concrete. The simulation results of circular and elliptical coarse aggregates are closer to the experimental values. The compressive strength of concrete cubes with different aggregate contents shows a trend of decreasing first and then increasing. The axial compressive strength decreases first, then increases and then decreases. The splitting tensile strength reaches a maximum of 4.61 MPa when the coarse aggregate content is 33%, and then gradually decreases. With the increase of porosity, the compressive strength, axial compressive strength and elastic modulus of concrete cube decrease gradually. The splitting tensile strength decreases more when the porosity is 1.5%, and increases when the porosity is 2%.

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Last Update: 2023-01-01