水稳定性对磷酸镁水泥砂浆与钢纤维粘结性能的影响

Q2 Engineering

SDHM Structural Durability and Health Monitoring Pub Date : 2019-01-01 DOI:10.32604/SDHM.2019.04864

H. Feng, Guanghui Liu, J. Yuan, M. Sheikh, F. Lu, Jun Zhao

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引用次数: 1

摘要

:通过纤维拉拔试验研究了水稳定性对磷酸镁水泥(MPC)基体与钢纤维粘结行为的影响。实验研究了mpc基体的组成和试样的浸渍年龄。通过对实验结果的分析，研究了平均粘结强度和拉出能。此外，利用扫描电子显微镜(SEM)研究了界面过渡区的微观特征。实验结果表明，mpc -基体与钢纤维的粘结性能随着浸水时间的增加而显著降低。试样在水中浸泡28天后，钢纤维与mpc基体的平均粘结强度降低50%以上。与mpc -基体组成相比，水对钢纤维与mpc -基体界面的影响更为显著。此外，MPC的MgO-KH - 2 - po4摩尔比显著影响了钢纤维与MPC基体界面区的水稳定性。

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Influence of Water Stability on Bond Performance Between Magnesium Phosphate Cement Mortar and Steel Fibre

: The fibre pullout test was conducted to investigate the influence of the water stability on the bond behaviour between the Magnesium phosphate cement (MPC) matrix and the steel fibre. The composition of the MPC-matrix and the immersion age of the specimens are experimentally investigated. The average bond strength and the pullout energy are investigated by analysing the experimental results. In addition, the microscopic characteristics of the interface transition zone are investigated using scanning electron microscopy (SEM). The experimental results showed that the bond performance between the MPC-matrix and the steel fibre decreased significantly with the increase of the duration of immersion in water. The average bond strength between the steel fibre and the MPC-matrix reduced by more than 50% when the specimens were immersed in the water for 28 days. The effect of the water on the interface between the steel fibre and the MPC-matrix was found to be more significant compared to the composition of the MPC-matrix. In addition, the MgO-KH 2 PO 4 mole ratio of the MPC significantly influenced the water stability of the interface zone between the steel fibre and MPC-matrix.

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来源期刊

SDHM Structural Durability and Health Monitoring Engineering-Building and Construction

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.