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Showing 1 to 20 of 24 for “"dolomitic limestone"”.
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Damage evaluation in dolomitic limestone using nonlinear ultrasonic higher harmonic generation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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An investigation of the effects of abnormal curing conditions on Dolomitic limestone Portland cement concrete
… at relative to Portland cement concrete using Dolomitic limestone sand as the fine aggregate. The most important of these are as follows: 1. Fresh concrete continues to gain strength while in the frozen state. 2. Freezing and then thawing of fresh concrete does not have an appreciable effect on …
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The movement of calcium and magnesium in selected Virginia soils from surface applied dolomitic limestone
Surface (0-20 cm) dolomitic limestone treatments of 0, 4.48, 8.96, and 13.44 Mg ha⁻¹ on the Coastal Plain and up to 17.92 Mg ha⁻¹ on the Piedmont and Ridge and Valley soils were made to seven acid Virginia soils. These amendments were made to document movement of Ca and Mg as well as neutralization …
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Calcium and magnesium requirements of Ilex crenata Thunb. "Helleri"
… A third experiment studied the influence of four dolomitic limestone rates (0, 2, 4, and 8 kg/m³) and two gypsum rates (1 and 2 kg/m³) mixed with pine bark on Ca availability, Mg availability, and pH over time. Although the addition of dolomitic limestone increased Ca and Mg in the medium …
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An experimental evaluation of explosives in blasting limestone and granite
… slab rounds and 70 quarry tests were made in the dolomitic limestone. This rock, known locally as the Quarry Ledge of the Jefferson City formation, is of Ordovician Age"--Abstract, page ii.</p>
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Influence of Lime and Micronutrient Amendments on Growth of Containerized Landscape Trees Grown in Pine Bark
… pine bark (Pinus taeda) were: with or without dolomitic limestone (3.57 kg.m-3) and with or without micronutrients (0.9 kg.m-3, Micromax™). The same experiment was repeated using Koelreuteria paniculata and Quercus palustris, the same lime and micronutrient treatments, and two pine barks: pH …
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Damage evaluation in dimension limestone using nonlinear ultrasonics
Dolomitic limestone test samples with increasing levels of damage were obtained by exposing limestone samples to temperature levels of 100 oC, 200 oC, 300 oC, 500 oC, 600 oC, and 700 oC for a period of 90 minutes. The samples were then nondestructively tested using nonlinear ultrasonics in the form …
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Alfalfa growth on acid soil as influenced by Al, Ca, pH and Mo
… to evaluate the influence of surface applied dolomitic limestone at 0 and 6.7 Mg/ha either 8 or 20 months before planting and at planting on alfalfa performance under acidic conditions. Yield increases, greater than two fold, resulted from surface application of limestone regardless of time of …
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The effect of zero point charge environment on rock fracture behavior
… environments. Semi-circular bend specimens of dolomitic limestone, Sioux quartzite and Westerly granite were tested in aqueous solutions of aluminum chloride, calcium chloride and polyethylene oxide, all at ZPC conditions. These rocks were also tested in atmospheric air and distilled deionized …
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Petrology and mineralogy of certain portions of the Fredericktown deposits
… with some lamination of glauconitic shale and dolomitic limestone. It contains most of the sulphide ore body.</p> <p>The sulphides occur in solid layered patterns, as disseminated agglomerations, concretions, individual grains, and as fragments of grains. They display distinct polar features …
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Calc-Silicate Rocks in the Wollaston Lake Area, Saskatchewan
… 2 - 6 kb. Marbles were derived from slightly dolomitic limestone. Calc-silicate rocks are the result of metamorphic diffusion of CO2, and K20 from a calcareous-pelitic rock. The movement of these components was probably caused by the incompatibility of calcareous assemblages in the presence of …
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Evaluation of modified dry limestone process for flue gas desulfurization
… on the performance of the Modified Dry Limestone Process (MDLP) for flue gas desulfurization. Two types of limestone, one calcitic and one dolomitic, were used. These materials were characterized by ICP analysis, X-ray diffraction, optical microscopy, SEM, and electron microprobe before …
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Effect of land application of fluidized-bed combustion residue on soil and plant characteristics of reclaimed surface-mined pastures, performance and mineral status of grazing steers and nutrient balance by sheep fed the forage
… residue (FBCR) results from mixing coal with limestone during the combustion process. This by-product may be used as a liming agent. A grazing trial was conducted on an acidic mine soil to compare FBCR to dolomitic limestone and no amendment (control). Six steers per treatment were grazed …
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The effects of growth medium acidity, exogenous growth regulators, and nitrogen fertilizer on the acceleration of Fraser fir seedling growth
… peat growth medium was adjusted with a to 8 kg dolomitic limestone/m3 compressed packaged peat to initial pH ranging from 3.9 to 6.7. Best growth (21.2 cm mean height at 19 months) was achieved with 1 kg/m³ and 2 kg/m³â ¢ with initial mean pH 4.2 and 4.5. respectively. Seedlings with 4 and 8 …
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The genesis and morphology of three southwest Virginia soils which were developed from material weathered from limestone
… which were formed from material weathered from limestone, were studied by means of mechanical and chemical analyses, and field studies or the soil profiles. The soils used in this investigation are all related in a general way, that is, they all occur within the Gray-Brown Podzolic region and …
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Industrial Wastewater Treatment Using Dolomite And Dolomitic Sorbents
… can be seen in Figure 1.1, (Anani, 1984). Pure dolomitic limestone has 30.4% CaO, 21.8% MgO, and 47.8% CO2. Impurities such as silica, chert, clay, shale, feldspar, etc, are usually associated with the dolomitic limestone.<br/><br/><br/><br/> <br/> Calcium<br/> Magnesium<br/> Carbonate<br/><br/> …
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Chemostratigraphy of the Uppermost Cambrian Below the Ordovician GSSP
… dark gray to black shale and thin ribbon limestone rhythmites, with few fossils. The samples are micritic limestone, dolomitic limestone, and dolostone. They were determined to be in primary to near-primary condition based on multiple screening tests. Cathodoluminescence screening reveals …
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Abrasion resistance of concrete and the use of high performance concrete for concrete railway crossties
… were tested: a hard mortar, a soft mortar, dolomitic limestone and trap rock. These tests explored the relationship between the abrasion resistance of a composite and the abrasion resistance of the individual phases in the composite. A new model for abrasion resistance of two-phase composite …
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A study of standards for the evaluation of ground limestone on the basis of fineness
Fifty-four samples of calcitic and dolomitic limestone ground by 21 Virginia companies to a fineness whereby not less than 95 percent would pass through a No. 10 sieve were collected and mechanically separated. The cumulative percentage of the material passing sieve Nos. 10, 20, 40, 60, 100, and …
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