MECHANICAL STRENGTH PROPERTIES OF TURMERIC RHIZOME AT DIFFERENT GEOMETRIC SIZE WITH ATTRIBUTE TO MOISTURE CONTENT

Acacia mangium is one of the most popular choices in the reforestation and rehabilitation of abandoned shifting cultivation areas dated back to the 70’s. This paper looks into the evaluation of mechanical strength and physical properties in structural size at green condition for Acacia mangium. The mechanical strength properties tests were referred to the modulus of rupture, modulus of elasticity and tensile strength. Meanwhile, physical properties determination referred to basic density and moisture content. At green condition, Acacia mangium had been identified under the strength group SG6. It was found that strength value of modulus of rupture was higher than the tensile strength value with 44% stronger in bending compared to in tension. At the structural size, the mean value for moisture content and basic density at green condition were reported with 73.03% and 0.54g/cm3 respectively.

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Several Common Retarders on Performance of Ultra-Early-Strength Grouting Material

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.477-478.931 ◽

2013 ◽

Vol 477-478 ◽

pp. 931-935

Author(s):

Chang Zheng Sun ◽

Xiao Ping Zhang ◽

Hai Nan Zhao ◽

Qiang Gao

Keyword(s):

Mechanical Strength ◽

Setting Time ◽

Strength Properties ◽

Preliminary Screening ◽

Final Setting Time ◽

Grouting Material ◽

Early Strength

To explore retarders on performance of ultra-early strength grouting material, Retarder, which are commonly used in the market after a preliminary screening, are further tested and analyzed for initial fluidity, setting time and mechanical strength properties of super early strength grouting material. The results show that: When borax content is 0.4%, the initial fluidity, final setting time, workability, mechanical strength are the best.

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Comparative Study on Mechanical Strength Properties of Concrete by Using Demolished Concrete Waste

International Research Journal of Multidisciplinary Technovation ◽

10.34256/irjmtcon30 ◽

2019 ◽

Vol 1 (6) ◽

pp. 235-239

Author(s):

Sabarinathan K ◽

Ashwathi R

Keyword(s):

Comparative Study ◽

Mechanical Strength ◽

Coarse Aggregate ◽

Environmental Awareness ◽

Strength Properties ◽

Raw Material ◽

Construction Waste ◽

The World ◽

Day By Day

The growing environmental awareness and Construction waste, is increasing day by day which in turn makes the world in seeking for examining the characteristics of Construction waste and obtaining a solution by using its reliable segments such that it can be used as a raw material and Conservation the natural recourses like Coarse aggregate

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Development and mechanical strength properties of a new lightweight soil

Environmental Earth Sciences ◽

10.1007/s12665-013-3027-2 ◽

2014 ◽

Vol 72 (4) ◽

pp. 1109-1116

Author(s):

Tae-Hyung Kim ◽

Gi-Chun Kang ◽

Lee-Keun Park

Keyword(s):

Mechanical Strength ◽

Strength Properties

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Moisture-Dependent Strength Properties of Thermally-Modified Fraxinus excelsior Wood in Compression

Materials ◽

10.3390/ma13071647 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1647 ◽

Cited By ~ 1

Author(s):

Edward Roszyk ◽

Elżbieta Stachowska ◽

Jerzy Majka ◽

Przemysław Mania ◽

Magdalena Broda

Keyword(s):

Moisture Content ◽

Strength Properties ◽

Treatment Temperature ◽

Thermal Modification ◽

Fraxinus Excelsior ◽

Mechanical Parameters ◽

Saturation Point ◽

Wood Moisture ◽

Intrinsic Anisotropy ◽

European Ash

European ash (Fraxinus excelsior L.) is one of the species commonly used for wood thermal modification that improves its performance. The presented research aimed to investigate a moisture-dependent strength anisotropy of thermally-modified European ash in compression. Wood samples were modified at 180 °C and 200 °C. Their mechanical parameters were determined in the principal anatomical directions under dry (moisture content of 3%) and wet (moisture content above fibre saturation point) conditions. Effect of heat treatment temperature and moisture content on the ash wood mechanical parameters concerning each anatomical direction were determined. The results show that thermal treatment kept the intrinsic anisotropy of wood mechanical properties. It decreased wood hygroscopicity, which resulted in improved strength and elasticity measured for wet wood when compared to untreated and treated samples. Higher treatment temperature (200 °C) increased wood elasticity in compression in all the anatomical directions despite wood moisture content during the measurements. Multivariate analysis revealed that the modification temperature significantly affected the modulus of elasticity perpendicular to the grain, while in the case of compression strength, the statistically significant effect was observed only parallel to the grain. The results obtained can be useful from an industrial perspective and can serve as part of a database for further modelling purposes.

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Technological Properties of Wood from Trees in Polluted Regions

IAWA Journal ◽

10.1163/22941932-90001009 ◽

1986 ◽

Vol 7 (4) ◽

pp. 389-397 ◽

Cited By ~ 4

Author(s):

A. Frühwald

Keyword(s):

Moisture Content ◽

Wood Quality ◽

Wood Properties ◽

Biological Indicators ◽

Strength Properties ◽

West Germany ◽

Technological Properties ◽

Growth Rings ◽

Physical Chemical ◽

Faster Development

Wood quality from about 230 healthy and diseased fir, spruce, pine and beech trees from various locations in West Germany was tested. In general results are satisfactory for mechanical wood properties, but some physical, chemical and biological indicators lead to the conclusion that logs from heavily diseased trees may be attacked a !ittle earlier and faster by microorganisms during storage. Width of growth rings is reduced in severely damaged softwood trees on most locations whereas beech shows no significant reduction. Declining health of the trees had no or little influence on wood density; the modulus of elasticity and strength were at normal levels and independent of tree damage. Width and moisture content of sapwood were reduced little in pines but more in spruce and fir. A tendency to a more intensely developed irregular brown heartwood in severeIy damaged beech trees could not be proved until now. Storage of spruce in a log yard for four months has shown a slightly faster development of discoloration caused by fungi in diseased trees whereas after seven months wood from healthy trees was more discoloured. After storage strength properties are not or only slightly reduced, but no difference was found between trees assigned to the various health classes. After two years of storage under sprinkling water, pine logs from healthy and diseased trees show no difference in discoloration.

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Mechanical Strength Properties of Injectable Carbonate Apatite Cement with Various Concentration of Sodium Carboxymethyl Cellulose

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.758.56 ◽

2017 ◽

Vol 758 ◽

pp. 56-60 ◽

Cited By ~ 5

Author(s):

Arief Cahyanto ◽

Atina Ghina Imaniyyah ◽

Myrna Nurlatifah Zakaria ◽

Zulia Hasratiningsih

Keyword(s):

Tensile Strength ◽

Mechanical Strength ◽

Carboxymethyl Cellulose ◽

Strength Properties ◽

Sodium Carboxymethyl Cellulose ◽

Control Group ◽

Carbonate Apatite ◽

Initial Finding ◽

Polymeric Additives ◽

Diametral Tensile Strength

Mechanical strength is one of the key factors for clinical application of injectable carbonate apatite (CO3Ap) cement. Incorporation of polymeric additives into the mixing liquid of injectable bone cement has been known to improve cement injectability. The aim of this study is to determine whether incorporation of sodium carboxymethyl cellulose (Na CMC) into the mixing liquid would affect the diametral tensile strength (DTS) of injectable CO3Ap cement. In the present study, Na CMC, a polymeric additive and a cellulose derivative, was used to promote the injectability of CO3Ap cement. Three groups of CO3Ap cement samples consist of CaCO3 and CaHPO4 powder in each group were mixed with 0.5 %, 1%, and 2% Na CMC solution incorporated to 0.2 mol/L Na2HPO4 solution. As a control, powder mixed with 0.2 mol/L Na2HPO4 solution was used. Samples were kept in an incubator (37°C, 100% relative humidity, 24 hours). The mechanical strength properties were evaluated by diametral tensile strength (DTS). The average DTS of samples containing 0.5%, 1%, and 2% Na CMC were 3.19 MPa, 3.57 MPa, and 3.06 MPa, respectively. While the average DTS of the control group was 3.29 MPa. The groups containing Na CMC in all concentrations showed no statistical difference (p>0.05) on DTS compared to the control group. The injectability improved as the concentration of Na CMC increased. In conclusion, revealed that Na CMC does not affect the mechanical strength of CO3Ap cement. Therefore, it may be considered as an effective material to promote cement injectability. Further study of additives that can be used to promote the injectability of CO3Ap cement and enhance the mechanical strength awaits based on this initial finding.

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