Experimental study on PVA reinforced salt-water ice under uniaxial-compression at arctic low temperatures

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL Cold Regions Science and Technology Pub Date : 2023-02-01 DOI:10.1016/j.coldregions.2022.103751

Jian Xie , Ming-Liang Yan , Jia-Bao Yan

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引用次数: 2

Abstract

This paper proposed a new kind of reinforced salt-water ice with polyvinyl alcohol (PVA) powder and PVA fibre for cold-region constructions. A total of 53 ice stub columns were tested at −60 °C to evaluate the compression behaviour of PVA reinforced salt-water ice (PRSI). Key parameters in this testing program included the length of PVA fibre, the mass fraction of PVA fibre, the mass fraction of PVA powder, and the saponification of PVA powder. The failure modes and compressive stress-strain curves of ice columns at low temperatures were reported. Meanwhile, the influences of different parameters on ultimate compressive strength, ductility index, elastic modulus, peak strain, and workability were reported and discussed. These results indicated that the new reinforcing type improved the compressive strength of plain salt-water ice (PSI) from 10.1 to 29.6 MPa, and the ductility of PSI was also improved. Considering the mechanical properties and workability of PRSI, the optimized mix proportion was proposed. Reducing the size of ice crystals and eliminating the stress concentration at crack tip are the reasons to improve the compressive strength of PRSI. Adding PVA fibre mainly improved the ductility of PRSI rather than its compressive strength. Moreover, a four-phase microscopic model of PRSI at low temperature was proposed to explain the enhancement and failure mechanism of PRSI.

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PVA增强盐水冰在北极低温单轴压缩下的实验研究

提出了一种以聚乙烯醇(PVA)粉末和PVA纤维为增强材料的新型寒区建筑用盐水冰。在- 60°C下，共测试了53根冰短柱，以评估PVA增强盐水冰(PRSI)的压缩性能。该测试方案的关键参数包括PVA纤维长度、PVA纤维质量分数、PVA粉末质量分数和PVA粉末皂化程度。报道了低温条件下冰柱的破坏模式和压应力-应变曲线。同时，讨论了不同参数对极限抗压强度、延性指标、弹性模量、峰值应变和和易性的影响。结果表明:新型加固方式将普通盐水冰(PSI)的抗压强度从10.1 MPa提高到29.6 MPa, PSI的延性也有所提高。综合考虑PRSI的力学性能和可加工性，提出了最佳配合比。减小冰晶尺寸和消除裂纹尖端应力集中是提高PRSI抗压强度的原因。PVA纤维的加入主要提高了PRSI的延展性，而不是其抗压强度。此外，提出了低温下PRSI的四相微观模型来解释PRSI的增强和破坏机制。

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.