AAC 2.5 Determination of the modulus of rupture of AAC

1994 ◽  
pp. 331-333
Keyword(s):  
Modulus Of Rupture

Effect of dispersible clay on the physical properties of the B horizon of a red-brown earth

Soil Research ◽  
1982 ◽  
Vol 20 (4) ◽  
pp. 315 ◽  
Author(s):  
RT Shanmuganathan ◽  
JM Oades
Keyword(s):  
Quantitative Characteristic ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Clay Particles ◽  
Chemical Treatments ◽  
Electrophoretic Mobilities ◽  
Dispersible Clay

Three methods were compared for the determination of dispersible clay in the absence of chemical treatments. Treatment of the B horizon of a red-brown earth with a range of amounts (0-0.24% iron) of iron poly[Fe(III)-OH] cations of nominal molecular weight 10 000 to 50 000 allowed production of a range of dispersible clay contents from 0 to 70%. The samples of clay B horizon with decreasing contents of dispersible clay showed decreasing electrophoretic mobilities with zero mobility when the content of dispersible clay was zero. In such samples the clay particles were present in aggregates 50-250 mu m diameter according to sedimentation techniques. The amounts of dispersible clay present appeared to control various physical and mechanical properties of the soil such as swelling, porosity and water retention capacity, hydraulic conductivity, friability and modulus of rupture. It is suggested that the content of dispersible clay may be a useful quantitative characteristic of soils as it controls many other properties.

Thermal and Thermomechanical Properties of Refractory Forsterite-Spinel Ceramics

2021 ◽  
Vol 325 ◽  
pp. 174-180
Author(s):  
Martin Nguyen ◽  
Radomír Sokolář
Keyword(s):  
Fly Ash ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Raw Materials ◽  
Thermal Analyses ◽  
Aluminium Oxide ◽  
Thermomechanical Properties ◽  
Modulus Of Rupture ◽  
Shock Resistance

This article examines the utilization of fly ash in comparison with alumina as raw materials and sources of aluminium oxide for synthesis of forsterite-spinel refractory ceramics. Raw materials were milled, mixed in different ratios into two sets of mixtures and sintered at 1500°C for 2 hours. Sintered samples were characterized by X-ray diffraction analysis and scanning electron microscopy. Samples were also subjected to determination of porosity, water absorption and bulk density. Thermal and thermomechanical properties were determined by thermal analyses, refractoriness, refractoriness under load, thermal shock resistance and thermal dilatometric analysis with determination of thermal expansion coefficient. Mixtures with 10 wt.% and 20 wt.% of fly ash had the most promising results compared to alumina mixtures. Thermal shock resistance and modulus of rupture were improving with increasing content of aluminium oxide in the mixture.

Determination of modulus of rupture and modulus of elasticity on flakeboard with fuzzy logic classifier

2009 ◽  
Vol 30 (6) ◽  
pp. 2269-2273 ◽  
Author(s):  
Fatih Yapici ◽  
Ayhan Ozcifci ◽  
Turgay Akbulut ◽  
Raif Bayir
Keyword(s):  
Fuzzy Logic ◽  
Modulus Of Elasticity ◽  
Modulus Of Rupture

scholarly journals Determination of Flexural Strength of Structural Red and White Oak and Hardwood Composite Lumber

2021 ◽  
Vol 71 (4) ◽  
pp. 401-406
Author(s):  
Laya Khademibami ◽  
Alan Sherrington ◽  
Rubin Shmulsky ◽  
Franklin Quin
Keyword(s):  
Flexural Strength ◽  
Selection Criterion ◽  
Modulus Of Rupture ◽  
Summary Statistics ◽  
White Oak ◽  
Commercial Use ◽  
Design Values ◽  
Grade Material ◽  
Highly Uniform

Abstract In this research, flexural properties of mill-run, in-grade red and white oak lumber from a single mill and commercially available laminated hardwood composite were evaluated. Structurally graded green (wet) freshly sawn red and white oak 5 by 10-cm (2 by 4-in) nominal lumber as well as glue-laminated hardwood composite billets were tested in bending and their modulus of rupture (MOR) and modulus of elasticity (MOE) properties were developed. It is well documented that MOR and MOE are two major indicators to evaluate flexural strength of wood lumbers. From these data, summary statistics, design values, and mean separations were calculated and reported. Overall, the red and white oak lumber performed similarly to structural No. 2 grade material. The hardwood composite billets were highly uniform. Each of the three materials demonstrated a reasonably good relationship between MOE and MOR, thereby suggesting that MOE could be used as a selection criterion for strength in a commercial use situation.

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