|Table of Contents|

Study on basic mechanical properties and conversion relationship of gneiss aggregate concrete(PDF)

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

Issue:
2023年03期
Page:
10-19
Research Field:
建筑材料
Publishing date:

Info

Title:
Study on basic mechanical properties and conversion relationship of gneiss aggregate concrete
Author(s):
XU Zhihua1; 2;  XIONG Wenyong1; 2;  LIU Hui1; 2;  LI Beixing3
(1. Jiangxi Transportation Engineering Group Co., Ltd, Nanchang 330000, Jiangxi, China; 2. Jiangxi Engineering Center for Bridge Intelligent Maintenance, Nanchang 330000, Jiangxi, China; 3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China)
Keywords:
gneiss aggregate concrete;  mechanical property;  machine-made sand;  mix proportion parameter;  conversion relationship;  regression analysis
PACS:
TU528
DOI:
10.19815/j.jace.2021.11027
Abstract:
In order to study the relationship between splitting tensile strength, axial compressive strength, elastic modulus and cubic compressive strength of gneiss machine-made aggregate concrete,the basic mechanical properties of 11 groups of C50 gneiss aggregate concrete were tested at different ages by selecting the water binder ratio, the rate of machine-made sand and the stone powder content in machine-made sand as the mixing parameter variables. Based on the test results, the influence of the mixing ratio parameters on the mechanical properties of gneiss aggregate concrete was discussed, and the conversion relationship between the cubic compressive strength and other mechanical properties was analyzed by using the mathematical statistics regression method. The results show that among the mechanical properties of gneiss aggregate concrete, the splitting tensile strength is the most affected by the change of proportioning parameters, the cubic compressive strength and axial compressive strength are the second, and the elastic modulus is the smallest. The fitted conversion relationship between splitting tensile strength, axial compressive strength, elastic modulus and cubic compressive strength of gneiss aggregate concrete can more accurately reflect the relationship between the cubic compressive strength of gneiss aggregate concrete and other mechanical performance indicators than the corresponding relationship in GB 50010—2010. The rebound value of gneiss aggregate concrete test block has little correlation with the cubic compressive strength.

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Last Update: 2023-05-20