|Table of Contents|

Study on mechanical properties of recycled large aggregate-self-compacting mortar rock-filled concrete(PDF)

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

Issue:
2023年01期
Page:
21-27
Research Field:
建筑材料
Publishing date:

Info

Title:
Study on mechanical properties of recycled large aggregate-self-compacting mortar rock-filled concrete
Author(s):
WANG Jianchao;  LI Huayu;  QIU Ziming
(School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China)
Keywords:
recycled aggregate concrete;  self-compacting mortar;  mechanical property;  test research;  recycled large aggregate-self-compacting mortar rock-filled concrete
PACS:
TU528
DOI:
10.19815/j.jace.2021.09124
Abstract:
In order to study the effects of the particle size of recycled large aggregate(RLA), the strength of RLA and the strength of self-compacting mortar(SCM)on the mechanical properties of recycled large aggregate-self-compacting mortar rock-filled concrete(RLA-SCMRFC), a series of experimental studies were carried out on 7 groups of different RLA-SCMRFC using a press. The results show that the SCM can fully fill the rockfill body composed of a smaller aggregate particle size. When the RLA particle size decreases from 100 mm to 60 mm, the SCM can still fill the rockfill fully, and its cube compressive strength only decreases by 5.97%, while the axial compressive strength and splitting tensile strength are both within a feasible range, which reflects that SCM can fill RLA and the effect is significant. In the stress-strain relationship of RLA-SCMRFC prism under axial compression, it is concluded that the strength, static elastic modulus and peak strain of RLA-SCMRFC are positively correlated with RLA particle size, strength of SCM and strength of RLA, and the influence of RLA particle size is less than that of the RLA strength and SCM strength. The calculated value of the strength calculation formula and the uniaxial compression polynomial constitutive model and rational fraction constitutive model of RLA-SCMRFC proposed through fitting is in good agreement with the measured value.

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Last Update: 2023-01-01