Hygrothermal Numerical Simulation: Application in Moisture Damage Prevention

Does electro-osmosis work in moisture damage prevention? Applicability of infrared-based methods to verify water distribution under electric fields

Journal of Cultural Heritage ◽

10.1016/j.culher.2018.04.009 ◽

2018 ◽

Vol 31 ◽

pp. S38-S45 ◽

Cited By ~ 3

Author(s):

Jacopo Melada ◽

Marco Gargano ◽

Ivan Veronese ◽

Nicola Ludwig

Keyword(s):

Electric Fields ◽

Water Distribution ◽

Moisture Damage ◽

Electro Osmosis ◽

Damage Prevention

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Numerical Simulation of Temporal and Spatial Evolution of Stress Field in Unconsolidated Sandstone Oil Reservoir

Journal of Physics Conference Series ◽

10.1088/1742-6596/2095/1/012095 ◽

2021 ◽

Vol 2095 (1) ◽

pp. 012095

Author(s):

Guihong Pei ◽

Jiecheng Song ◽

Xiaolong Zhang

Keyword(s):

Numerical Simulation ◽

Stress Field ◽

Geological Structure ◽

In Situ Stress ◽

Prevention Measures ◽

Casing Damage ◽

In Situ Stress Field ◽

Oilfield Development ◽

Damage Prevention

Abstract Casing damage in the process of oilfield development is a serious problem, which is affected by geological structure, production technology and many other factors. To prevent casing damage, it is necessary to master the space-time evolution law of reservoir in-situ stress field, to provide support for casing damage prevention. Based on the perseage-stress coupling theory, taking the actual reservoir block as the research object, the change law of the in-situ stress field in unconsolidated sandstone reservoir is obtained through the fluid-solid coupling numerical simulation of the reservoir, and the internal correlation between the stress field and casing damage is analysed. The research results provide theoretical guidance for the formulation of casing damage prevention measures in the research block.

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Investigation on Moisture Damage Prevention of a Spherical Hinge Structure of a Swivel Bridge

Coatings ◽

10.3390/coatings10100955 ◽

2020 ◽

Vol 10 (10) ◽

pp. 955

Author(s):

Wei Guo ◽

Xuedong Guo ◽

Ziwen Wang ◽

Zhun Li

Keyword(s):

Performance Test ◽

Unsaturated Polyester ◽

Moisture Damage ◽

Bending Test ◽

Optimal Dosage ◽

Test Results ◽

Uniform Dispersion ◽

Spherical Hinge ◽

The Impact ◽

Damage Prevention

As a key component of a swivel bridge, the spherical hinge is a steel-concrete structure, which is susceptible to moisture damage during waiting time. In this paper, spherical hinge moisture damage prevention is investigated comprehensively from two aspects of impermeable concrete and steel-concrete interface waterproof coating. Three impermeable concretes were prepared and tested by the compressive strength test, splitting tensile test, four-point bending test and the impermeability test. The test results illustrated that addition of cementitious capillary crystalline active masterbatch (CCCAM) and polypropylene fiber (PP) could improve the toughness and brittleness of concrete. The addition of CCCAM was an effective technique for improving the permeability of concrete. However, the incorporation of PP and CCCAM at the same time cannot improve the impermeability of concrete. This may be because the chaotic support structure formed by PP prevents the infiltration and uniform dispersion of CCCAM. A waterproof coating consolidation performance test was proposed to quantify the interface bond strength of waterproof coatings and assess the impact of temperature, moisture and freeze-thawing cycles on consolidation performance of waterproof coatings. The test results showed that temperature had a significant effect on the interface consolidation property of waterproof coatings and the optimal dosage of SBS modified asphalt (SBS), polyurethane (PLT) and unsaturated polyester resin (UPLS) waterproof coating is 1.18kg/m2, 0.95kg/m2 and 1.15kg/m2, respectively. Moreover, it was found that PLS waterproof coating maintained excellent properties in complex environment. This is because PLS has excellent shear strength and rubber characteristics, and it can form a hard–soft–hard transition layer between the concrete and steel, reducing the impact of environmental factors.

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