Experiment Study on the Durability of Geotechnical Prestressed Anchorage Structure under Cyclic Loading

Chip seal bleeding is influenced by many factors, including design inputs, material properties, and project-specific conditions. It reduces the surface texture of the pavement and thus compromises the safety of the traveling public. Even though factors that bring about premature bleeding are known, currently, no laboratory test methods for evaluating bleeding in chip seals have been specified. The objective of this paper is to present the results of an investigation of the influence factors of asphalt emulsion residue properties measured by the ASTM D7405 multiple stress creep and recovery (MSCR) test, as well as other factors related to chip seal bleeding resistance as measured by the modified loaded wheel test (MLWT). In this study, the MSCR test was used as a tool for evaluating the performance of asphalt emulsions because it has been identified as a potential test related to bleeding in the field. In addition, MLWT was selected as a tool for evaluating chip seal bleeding performance in the laboratory. The results of the MLWT showed that the emulsion application rate (EAR), aggregate gradation, and emulsion properties were significant factors affecting bleeding. The MSCR test was found to be a promising tool for the performance evaluation of asphalt emulsion residue, as the test was able to differentiate between emulsion chemistries and modifications in terms of sensitivity to both temperature and stress. In relation to chip seal bleeding resistance, only the creep compliance (Jnr) obtained from the MSCR test results was identified as a significant property affecting potential for bleeding.

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Flexural creep behavior of structural insulated timber panels

10.32920/ryerson.14660949 ◽

2021 ◽

Author(s):

Mohammad Hossein Zarghooni

Keyword(s):

Creep Test ◽

Creep Behavior ◽

Experimental Testing ◽

Test Methods ◽

Load Test ◽

Test Results ◽

Financing Costs ◽

Wood Frame ◽

Term Creep

A Structural Insulated Panel (SIP) is a panel composed of insulation core laminated between two oriented-strand boards (OSB). SIPs deliver building efficiencies by replacing several components of traditional residental and commercial construction, including: (i) studs; (ii) insulation; (iii) vapour barrier; and (iv) air barrier. A SIP-based structure offers superior insulation, exceptional strength, and fast installation. Besides those benefits, the total construction costs are less with SIPs compared to wood-framed homes, expecially when considering speed of construction, less expensive HVAC equipment required, reduced site waste, reduction construction financing costs, more favourable energy-efficient mortages available, and lower cost of owning a home built with SIPS. This thesis presents the experimental testing on selected SIP sizes to investigate their short- and long-term creep behavior under sustained loading. The experiment study performed in a manner to comply with applicable test methods and, Canadian Codes. Short-term creep test results showed the structural adequacy of the tested panels, while the long-term creep test results established the increase in panel total deflection with time. The ultimate load test results showed that the structural qualification of SIPs is "as good as" the structural capacity of the conventional wood-frame buildings.

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The Research of Negative Ion Test Method for Fabric

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.756-759.138 ◽

2013 ◽

Vol 756-759 ◽

pp. 138-140 ◽

Cited By ~ 1

Author(s):

Yun Sen Sun ◽

Bo Qiu ◽

Qing Shan Li

Keyword(s):

Influence Factors ◽

Test Methods ◽

Test Method ◽

Ion Concentration ◽

Negative Ion ◽

Testing Device ◽

Test Results ◽

Influence Of Temperature ◽

Functional Textiles ◽

Temperature And Humidity

We developed a device for automatic closed friction and analyzed its test results in this paper, which showed the influence factors in the test methods of textile negative ion occurrence amounts. The textile negative ion occurrence amounts in different time stages were tested in this process; the analysis of its influence of temperature and humidity has certain reference significance for improving testing device for testing textile negative ion concentration, on the basis, functional textiles were also studied. Finally, we put forward the influence factors in the test methods of textile negative ion occurrence amounts.

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Resistance of metals to fatigue failure and deformation during two-frequency loading. Report 1. Test methods and results on the fatigue and inelasticity of metals during two-frequency cyclic loading

Strength of Materials ◽

10.1007/bf01529252 ◽

1989 ◽

Vol 21 (10) ◽

pp. 1285-1292 ◽

Cited By ~ 3

Author(s):

L. A. Khamaza ◽

V. A. Kovalenko

Keyword(s):

Cyclic Loading ◽

Fatigue Failure ◽

Test Methods

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Experimental Study on the Interface Properties of Geotechnical Anchorage Bolt under Cyclic Loading

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.1202 ◽

2012 ◽

Vol 170-173 ◽

pp. 1202-1206

Author(s):

Si Feng Zhang ◽

Jian Xiang Feng ◽

Rui Han ◽

Zhi Gang Sun

Keyword(s):

Cyclic Loading ◽

Test Results ◽

Deep Foundation ◽

Foundation Pit ◽

Interface Shear ◽

Deep Foundation Pit ◽

Loading Mode ◽

Cycle Loading ◽

Development And Evolution

Geotechnical prestressed anchorage structures are widely used in high slope, deep foundation pit, dam and other geotechnical reinforcement engineerings. Under the influence of the outside environment, its pretensioned force is not fixed, but presents a kind of approximate closed cyclic loading mode, under which the development and evolution regularity of the interface shear stress for the inner bond section of geotechnical prestressed anchorage structure is directly related to the ultimate bearing capacity and its long-term durability. In the experiment, the means of indoor model test was adopted, in which the different loading scheme and loading amplitude were taken into account and the interfaces mechanical properties of inner bond section for geotechnical prestressed anchorage structures under cyclic loading were studied. According to the test results, the development and evolution regularity of the interface shear strain for the inner bond section is revealed, and the long-term durability of the geotechnical anchorage bolt under cycle loading is put forward.

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Shelf-life prediction for Indian mango roll using accelerated shelf-life testing (ASLT) shelf-life plot approach

Food Research ◽

10.26656/fr.2017.4(3).399 ◽

2020 ◽

Vol 4 (3) ◽

pp. 839-845

Author(s):

B. Jimeno ◽

A. Rosales ◽

C.J. Domingo

Keyword(s):

Shelf Life ◽

Osmotic Dehydration ◽

Aluminum Foil ◽

Test Methods ◽

Test Results ◽

Long Term Storage ◽

Shelf Life Prediction ◽

Different Temperatures ◽

Sensory Analyses

Indian mango roll is a sweet and chewable after-meal sugar fix. It is prepared from the puree of Indian mango and dried to form a glossy sheet. Ripe raw Indian mango generally has a short shelf-life. Osmotic-dehydration is one way to extend the shelf-life of Indian mango. Changes in color and flavor were considered as critical aspects upon long-term storage at accelerated temperatures. This research aimed to predict the shelf-life of Indian mango roll with Accelerated Shelf-life Test methods. Indian mango rolls packed in 30 g stand up aluminum foil with polyethylene liner were stored at three different temperatures, 35°C and 45°C for temperature acceleration, and 30°C for the actual temperature for one hundred eighty (180) days. The storage of Indian mango roll at 30°C, 35°C, and 45°C is predicted until 255 days, 244 days, and 69 days, respectively, based on the test results for the conducted microbiological, physicochemical and sensory analyses. The results implied that the Indian mango roll can be stored long enough before becoming unfit for consumption or sale.

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Flexural creep behavior of structural insulated timber panels

10.32920/ryerson.14660949.v1 ◽

2021 ◽

Author(s):

Mohammad Hossein Zarghooni

Keyword(s):

Creep Test ◽

Creep Behavior ◽

Experimental Testing ◽

Test Methods ◽

Load Test ◽

Test Results ◽

Financing Costs ◽

Wood Frame ◽

Term Creep

A Structural Insulated Panel (SIP) is a panel composed of insulation core laminated between two oriented-strand boards (OSB). SIPs deliver building efficiencies by replacing several components of traditional residental and commercial construction, including: (i) studs; (ii) insulation; (iii) vapour barrier; and (iv) air barrier. A SIP-based structure offers superior insulation, exceptional strength, and fast installation. Besides those benefits, the total construction costs are less with SIPs compared to wood-framed homes, expecially when considering speed of construction, less expensive HVAC equipment required, reduced site waste, reduction construction financing costs, more favourable energy-efficient mortages available, and lower cost of owning a home built with SIPS. This thesis presents the experimental testing on selected SIP sizes to investigate their short- and long-term creep behavior under sustained loading. The experiment study performed in a manner to comply with applicable test methods and, Canadian Codes. Short-term creep test results showed the structural adequacy of the tested panels, while the long-term creep test results established the increase in panel total deflection with time. The ultimate load test results showed that the structural qualification of SIPs is "as good as" the structural capacity of the conventional wood-frame buildings.

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Degradation of Fracture and Fatigue Properties of MEMS Structures Under Cyclic Loading

MRS Proceedings ◽

10.1557/proc-863-b7.4/o11.4 ◽

2005 ◽

Vol 863 ◽

Author(s):

Jong-Jin Kim ◽

Dongil Kwon

Keyword(s):

Cyclic Loading ◽

Fatigue Property ◽

Cyclic Softening ◽

Test Methods ◽

Fatigue Properties ◽

Tensile Fracture ◽

Test Results ◽

Feature Size ◽

Number Of Cycles ◽

Cycles To Failure

AbstractThe fracture and fatigue properties of LIGA nickel MEMS structures were evaluated by microtensile and fatigue test methods. A microtensile/fatigue device was developed and specimens with feature size ten micrometers were used. The fatigue property was derived from displacement amplitude – the number of cycles to failure curve by applying a dynamic load with a piezoelectric actuator. The tensile/fracture properties after various cyclic loading were also measured. Both fatigue and tensile test results showed a cyclic softening phenomenon.

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Study on the Characteristics of Elastic Wave Velocities of Rockmass under Different Test Methods

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.449 ◽

2012 ◽

Vol 170-173 ◽

pp. 449-452 ◽

Cited By ~ 1

Author(s):

Wu Xiu Ding ◽

Hong Yi Wang ◽

Bing Xie

Keyword(s):

Elastic Wave ◽

Influence Factors ◽

Field Tests ◽

Test Methods ◽

Test Results ◽

Penetration Test ◽

Wave Velocities ◽

Test Conditions ◽

Study Results ◽

Main Influence

There are many methods of testing elastic wave velocities of engineering rockmass such as the elastic wave penetration test between adits, elastic wave test on the adit wall and the borehole sonic method etc, but the test results vary with different test methods. It is important to understand and apply appropriately the test results. Based on the field tests, the characteristics of elastic wave velocities under different test methods are studied. The research indicates that the main influence factors of different test methods on wave velocities include the rockmass occurrence environments and the test conditions. For the elastic wave penetration test between adits, the rockmass occurrence environments are basically unchanged, and the influences of the test conditions are little, so the wave velocity obtained by this method is more scientific. The study results are important for the reasonable evaluation of engineering rockmass.

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