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Showing 1 to 20 of 25 for “"Crushing Strength"”.
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The relationship between the crushing strength of brittle materials and the size of cubical specimens tested
… the following formula, relating the compressive strength to the size of the cube can be applied: P = k .a- n Where P is the compressive strength in pounds per square inch. a is the edge dimension os specimens tested. n is a constant. k is a constant. The value of n has been found by a majority of …
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Strength Properties of Juvenile and Mature Wood of Twelve Families of Loblolly Pine (Pinus Taeda L.)
… wood test specimens were prepared. Maximum crushing strength, modulus of rupture, modulus of elasticity and wood specific gravity were determined from compression parallel to the grain tests and static bending tests. Maximum crushing strength, modulus of rupture, modulus of elasticity, and …
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Durability testing of ceramic candle filters in pressurized-fluidized bed combustion environments
… results of the analysis show that significant crushing strength losses were exhibited by the SiC filters after exposure to HTHP alkali-steam conditions at temperatures as low as 700°C. The expansive and destructive cristobalite phase developed in the SiC filters after most of the treatments. …
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The fabrication of silicon carbide heating elements
… various firing schedules. Both resistivity and crushing strength were determined. It was found that the resistivity is dependent upon degree of sintering (indicated by crushing strength) as well as the packing density of the porous body.
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Genotypic differences in lodging and Mechanical strength in stalks and Peduncles of Pearl millet (Pennisetum glaucum (L.) R. Br.)
Differences were found in lodging and mechanical strength tests among pearl millets, pearl millet x Napier grass (PMxNG) lines, test crosses and sorghum. In 1987 field lodging ranged from 0 to 98%. Test crosses with PMxNG lines lodged worse on average than the millets or sorghum, but they were …
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Genotypic differences in lodging and Mechanical strength in stalks and Peduncles of Pearl millet (Pennisetum glaucum (L.) R. Br.)
Differences were found in lodging and mechanical strength tests among pearl millets, pearl millet x Napier grass (PMxNG) lines, test crosses and sorghum. In 1987 field lodging ranged from 0 to 98%. Test crosses with PMxNG lines lodged worse on average than the millets or sorghum, but they were …
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Correlation of bulk density and strength of light weight ceramic bodies
… the relationship of bulk density and strength was investigated and an empirical equation for the type Y=aX<sup>b</sup>, where Y represents unit crushing strength and X represents bulk specific gravity, was found to agree with the data. It was found that a rational theory for the …
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Application of graphene based composites in agriculture
… surface chemistry and a high mechanical strength, this thesis examined the potential for use of GN-based materials to improve thenutrient delivery to crops, to enhance fertiliser use efficiency as well as the mechanical properties of granular fertilizers. The following four concepts were …
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GROWTH AND MECHANICAL DEFORMATION OF ALPHA-LACTOSE MONOCRYSTALS
… the monohydrate form. This was confirmed by the crushing strength and acoustic emission measurements, which also revealed a distinct difference in the deformation behaviour of the two lactose types. Alpha-lactose monohydrate crystals deformed by spalling fracture whereas the anhydrous form was …
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Dry pressed lightweight refractories from Virginia kyanite
… of bulk density and volume stability, and cold crushing strength only slightly less than commercial grades of insulating refractories recommended for service at 2900-3000℉.
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Mechanical And Computational Evaluation Of Cementitious Materials With Hollow Glass Microsphere Inclusions
… microspheres; one was high density with high crushing strength, and the other with a relative lower density. Using a suite of software called Virtual Cement and Concrete Testing Laboratory (VCCTL), the microstructural details were determined for 80% degree of hydration of the cement mixture …
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A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
… with bulk densities about 1.7-2.3g/cm3. Cold crushing strength (CCS) and modulus of rupture (MOR) give readings of 15-59 MPa and 6.2-9MPa respectively. Meanwhile, the analysis on thermal properties found specimens having thermal shock resistance on a 20-30 scale cycle, pyrometric cone …
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Quantitative anatomical characteristics of plantation grown loblolly pine (Pinus taeda L.) and cottonwood (Populus deltoides Bart. ex Marsh) and their relationships to mechanical properties
… significantly account for the variation in the strength properties. Close to 87% of the variation in MOR and 86% in MOE could be accounted for by the three anatomical parameters in loblolly pine. About 82% of the variation in the crushing strength parallel to grain could be explained by the …
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Influence of site, clone, age, and growth rate on wood properties of three Populus X Euramericana clones
… differences among clones for modulus of rupture, crushing strength, maximum tensile strength, and tension modulus of elasticity. Strength properties were significantly higher near the bark than close to the pith except for maximum tensile strength. Specific gravity was not the single most …
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Evaluation of lateritic coarse aggregates as a partial replacement for granite coarse aggregates in structural concrete.
… for concreting are normally produced by crushing granite, limestone and basalt among other rock types. However, these rocks are scarce diminishing natural resources and henceforth; the need to study other naturally available materials for full or partial replacement; with the intention of …
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Evaluation of lateritic coarse aggregates as a partial replacement for granite coarse aggregates in structural concrete.
… for concreting are normally produced by crushing granite, limestone and basalt among other rock types. However, these rocks are scarce diminishing natural resources and henceforth; the need to study other naturally available materials for full or partial replacement; with the intention of …
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Continuity development between precast beams using prestressed slabs, and its effect on flexure and shear
… Series B, effect of prestressed slabs on shear strength at the continuity connection has been studied. A considerable increase in web shear cracking load was obtained for beams with prestressed slabs, resulting in a decrease In the amount of shear reinforcement required for such beams. The …
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Shear transfer between precast prestressed bridge beams and in-situ concrete crosshead in continuous structures
… predictions for the web cracking shear and web crushing strength. A mathematical model is also proposed to predict the stirrup stress according to shear span, effective depth and stirrup ratio when failure is controlled by web crushing. Stirrup stress measurement in the vicinity of continuous …
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Modification of natural hydrophilic polymers for use in pharmaceutical formulations
… 200 and Avicel-Mg silicate co-precipitate. Crushing strength and disintegration-time studies were conducted in order to evaluate tablet properties at different compression pressures. Lubrication of chitin-Mg silicate powder with MgSt was evaluated using a high speed rotary tablet press. The …
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Preparation of novel modified-release dosage forms of diclofenac sodium and ibuprofen.
… forces (11 - 26 kN) slightly affected the crushing strength. The minimatrices were relatively stable to variation in temperature (5 - 37°C) and relative humidity (10 - 75%) over a 2 month time period. These studies have shown that near zero-order release of diclofenac sodium and S(+) …
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