Academic literature on the topic 'Limestone'

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Journal articles on the topic "Limestone"

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Houngaloune, Sengpasith, Kamar Shah Ariffin, Hashim bin Hussin, Koichiro Watanabe, and Visane Nhinxay. "A STUDY ON THE SPECIFIC RATE OF BREAKAGE OF DIFFERENT LIMESTONES FROM LAO PDR AND MALAYSIA IN A LABORATORY BALL MILL." ASEAN Engineering Journal 1, no. 3 (September 20, 2011): 142–51. http://dx.doi.org/10.11113/aej.v1.15304.

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Effects of the different limestones and feed size on the specific rate of breakage (Si) were investigated at batch grinding conditions based on kinetic model. Six different mono-size fractions were prepared between 212 and 20 µm. The specific rates of breakage were determined from the size distributions at different grinding times, and the specific rates of breakage were compared for four limestone samples taken from different geological origin (Baling limestoneLB, Vangvieng limestone-LV, Laungprabang limestone-LL and Oudomxay limestone-LO). The results indicated that the different properties of limestone had a significant effect to the specific rate of breakage. The LB limestone gave the fastest rates of breakage because of its prominent cleavages texture, whereas the LO limestone had the slowest rates of breakage which this is due to its high content of impurities such as silica, magnesia, alumina and iron oxide. The variation of the specific rate of breakage with feed size of limestones studied show that the feed size of -75+53µm gave the highest rate of breakage compared to other feed sizes for LV, LL and LO samples; while the size fraction of -106+75µm was the best feed size for LB sample.
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Roy, Debasish, Dheeraj Pande, Sikta Patnaik, S. K. Varughese, A. K. Pradhan, B. Saravanan, and A. K. Bhatt. "Petro-mineralogical and geochemical characteristics of Shahaba Limestone from Gogi-Kanchankayi sector, Bhima Basin, Karnataka with reference to Uranium mineralisation." Journal of The Indian Association of Sedimentologists 38, no. 1 (June 30, 2021): 23–32. http://dx.doi.org/10.51710/jias.v38i1.139.

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The Shahabad Limestone Formation of Bhima Basin from Gogi-Kanchankayi area occurs in heterogeneous forms like massive/blocky limestone, argillaceous/ siliceous limestone and laminated/ flaggy limestone. These limestones are primarily composed of micrite, which often alters into sparry calcite on diagenesis with associated impurities of quartz, feldspar, barite, chlorite, glauconite, sulphides and carbonaceous matter. Geochemically, these limestones comprises of variable CaO with low MgO and P2O5 content. Trace elements concentration shows elevated Ba, Rb and depleted Sr. The current study classified these limestones as non-dolomitic and non-phosphatic types deposited in shallow marine carbonate platform setting with low energy conditions. Post-sedimentation, basin tectonics has resulted in reactivation of the basin margin fault causing intense fracturing of limestone. Subsequent hydrothermal movement along those fractures has resulted in re-mobilisation and re-precipitation of sulphides and carbonaceous matter, and along with alteration has facilitated the precipitation of the uranium bearing minerals.
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Pivko, Daniel. "Litavský vápenec zo St. Margarethenu a Fertőrákosu a jeho využitie na Slovensku ako dekoračný kameň." Geologické práce Správy 138 (February 24, 2023): 95–118. http://dx.doi.org/10.56623/gps.138.4.

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In Western Slovakia, especially in the Bratislava region and Trnava region, Leitha limestone of the Badenian (Langhian – early Serravalian) age from St. Margarethen in Austria was widely used for architectural articles and sculptures (200 realizations), alternatively a similar limestone from Fertőrákos in Hungary. 380 tombstones were identified only in Bratislava cemeteries. From the second half of the 17th century to the first half of the 20th century, the limestones were one of the most used in Slovakia due to their light dressing and relatively homogeneous appearance. The strongly porous coarse-grained to medium-grained the Leitha limestone has the appearance of sandstone and is composed of a predominance of red algae nodules over foraminifers, sea urchin, moss and shell fragments. The rhodoliths, pectenoids and oysters are scattered in the Leitha limestones up to a few cm size, which distinguish the limestone type from other the Leitha limestones and similar Sarmatian limestones. The limestone is dominated by rhodolithes in the St. Margarethen quarry and by bivalves and macroscopic quartz in Fertőrákos quarry. Porous limestones are exposed to weathering outdoors, leading to mass loss, flaking, sulphate efflorescence, black crusts from microscopic organisms and the colonization by lichens and mosses. The peak of limestone use for public buildings and sculptures was the years 1745 to 1780 (reign of Maria Theresa), and about 1880 to 1915, when there was relative prosperity and machine production began. The tombstones made of the Leitha limestones shifts to a peak between 1905 and 1925. In the 20th century, the Leitha limestones gave way to a competition from Czech decorative stones.
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Tung, Bui Duc, Ngoc Ha Do, Nguyen Kim Thanh, Le Hong Luong, Osamu Watanabe, Kazunori Hayashi, Akihiko Wakai, and Shinro Abe. "Geometry and the Mechanism of Landslide Occurrence in a Limestone Area – Case Examples of Landslides in Vietnam and from Europe, China, and Japan –." Journal of Disaster Research 16, no. 4 (June 1, 2021): 646–57. http://dx.doi.org/10.20965/jdr.2021.p0646.

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Landslide damage has been reported in many limestone areas in Europe, where the population lives close to limestone areas, and in Guilin in southern China and Ha Long in Vietnam, which are known for their unique limestone landscapes. There are few studies on the mechanism and type of landslide motion in and around such limestone areas. The lack of basic data is a problem for risk assessment and countermeasures in limestone areas. In this study, we summarized the causes and mechanisms of landslide occurrence, including geology and groundwater, focusing on six landslides that occurred in limestone areas in northern Vietnam, and classified them into six types of landslide movement. In the case of Japan, the occurrence of landslides in limestone areas is rare despite the wide distribution of limestone, and it is difficult to classify the type of movement. Differences in the landslide mechanisms are caused by the difference between limestones generated in the pelagic environment of Japan and limestones developed along the Tethys Sea coast, which are mixed with pelitic rocks as shallow-water sediments in Europe, China, and Vietnam. It is necessary to elucidate the relationship between landslides and the formation environment and sedimentary characteristics of limestone as an accretionary prism based on comparisons of a wide range of cases in future studies.
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Dvořák, Karel, Dušan Dolák, Jaroslav Bureš, Dalibor Všianský, and Simona Ravaszová. "The Relation of Limestone Origin and its Reactivity to the Preparation of Desulphurization Agents." Solid State Phenomena 276 (June 2018): 83–88. http://dx.doi.org/10.4028/www.scientific.net/ssp.276.83.

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Limestone is used in the flue gas desulphurization process due to its ability to form sulfur compounds. Different qualities of limestone absorbents can be used in the process and it is therefore important to measure the reactivity of these materials. A limestone with a 90 to 95% of calcium carbonate is used to prepare limestone slurry for the flue gas desulphurization. It is very important to explore the different properties of the raw material for a better understanding of the desulphurization process and also the impact on the economic aspect of the process [1-3]. This article presents a study about limestones reactivity, which is measured by the Bischof-Uhde method. At first the study monitors the impact of the milling of set of Czech limestones on their reactivity and furthermore deals with the influence of the genesis and porosity of the set of world limestones also on the reactivity of limestones in the desulphurization process.
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Wang, Jue, Xu Wu, and Oliver C. Mullins. "Fluorescence of Limestones and Limestone Components." Applied Spectroscopy 51, no. 12 (December 1997): 1890–95. http://dx.doi.org/10.1366/0003702971939712.

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The fluorescence of a series of limestones has been investigated; the relative fluorescence intensities of these limestones differ by a factor of 10. With UV excitation, the fluorescence spectra of these limestones exhibit two distinct peaks, one blue and one red; the relative magnitude of the blue peak is larger for more fluorescent limestone. The limestones were digested, allowing for isolation of different limestone components, which are acid-extractable organics, bitumen, and kerogen. With the correlation of fluorescence spectra and intensities, it has been established that the acid extract fraction produces the blue peak in the rocks. Concentrated bitumen produces red fluorescence, contributing to the red peak of the rock. Generally, the limestone kerogens are found to possess very low fluorescence, in contrast to carbonaceous shale kerogens, and probably do not contribute to rock fluorescence.
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Rock, N. M. S. "Value of chemostratigraphical correlation in metamorphic terranes: an illustration from the Colonsay Limestone, Inner Hebrides, Scotland." Transactions of the Royal Society of Edinburgh: Earth Sciences 76, no. 4 (1985): 515–17. http://dx.doi.org/10.1017/s0263593300010683.

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ABSTRACTChemostratigraphical correlation provides valuable insights into the status of the Colonsay Group, which field and structural studies have left unresolved. Using published discriminant functions, major and trace element data support previously proposed correlations of the Colonsay Limestone with Appin Group (Lower Dalradian) limestones, and particularly with the Ballachulish Limestone Formation. They also tend to preclude correlations with other nearby Dalradian carbonate formations, with marbles of the early Precambrian Lewisian complex, and with miscellaneous unassigned limestones in a similar structural position to the Colonsay Limestone, astride the Great Glen fault.
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Maryanto, Sigit, Dian Hari Saputra, Sonia Rinjani, and M. Luthfi Faturrakhman. "Sedimentologi Batugamping Formasi Jayapura di Sepanjang Lintasan Dewarebru, Mamei-Waibron, Jayapura." Jurnal Geologi dan Sumberdaya Mineral 21, no. 2 (May 20, 2020): 77. http://dx.doi.org/10.33332/jgsm.geologi.v21i2.506.

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The Pleistocene of the Jayapura Formation limestones well cropped out at Dewarebru Section, Mamey-Waybron, Jayapura Regency. Detailed descriptions of rock outcrops and petrography analysis of selected limestone samples is used to find out the limestone sedimentology characters. This Jayapura limestone was divided onto four limestone facies, including lithoclastic rudstone, bioclastic packstone, bioclastic grainstone and bioclastic wackesone rock facies. The rocks was deposited in a fore slope talus forming submarine alluvial fan, furthermore the rocks was deposited in a local slope on the back reef environment.Keywords: Limestone, petrography, stratigraphy, sedimentology, Jayapura
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Gołaszewski, J., G. Cygan, and M. Gołaszewska. "Analysis of the Effect of Various Types of Limestone as a Main Constituent of Cement on the Chosen Properties of Cement Pastes and Mortars." Archives of Civil Engineering 65, no. 3 (September 1, 2019): 75–86. http://dx.doi.org/10.2478/ace-2019-0035.

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AbstractThe article is an attempt to compare the impact of the use of various types of limestone as the main constituent of cement on selected mortar properties. Four different limestones were added in amount of 15, 30, 40% to CEM I 42.5 R to obtain limestone cemens. Rheological properties (yield stress, plastic viscosity) of fresh mortar, tensile and compressive mortar strength, early shrinkage, and drying shrinkage were tested. Obtained results indicate that both tensile and compressive strength decreases with the increase of the limestone content in cement. Limestone can worsen or improve workability, depending on distribution of limestone grains. The addition of limestone increases the early shrinkage, but reduces the shrinkage after 28 days. Studies show that the granulation of limestone plays an important role in determining the influence of limestone on mortar properties.
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Darman, Herman. "Tracing the Provenance of the Devonian Limestone of Telen River, East Kalimantan." Berita Sedimentologi 47, no. 1 (August 15, 2021): 57–62. http://dx.doi.org/10.51835/bsed.2021.47.1.62.

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H. Witkamp found an outcrop with Devonian Limestone in East Kalimantan in 1925. In 1989, an expedition run by Institute of Technology Bandung (ITB) reinvestigated the outcrop and concluded that the Devonian Limestones in Telen River were boulders within a Permian formation. This paper gives a wider overview on the distribution of Devonian rocks in Asia Pacific region and discusses their possible origin.Based on the distribution map of Devonian rocks in the region, the Devonian limestone in Borneo is very isolated. The closest Devonian limestones are about more than 2000 km away. Probably the Devonian limestone in Telen River has been separated away from its origin by significant tectonic movement. There are several theories and models related to the formation history of this area, which makes it very complex. To understand the origin of these limestones, the geology needs to be restored to their time and place of deposition of the Devonian limestone.
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Dissertations / Theses on the topic "Limestone"

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Carter, Nick. "Bioprotection explored : lichens on limestone." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396154.

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Tucker, Richard Frank. "The regeneration of sulphated limestone." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236055.

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Fluidised bed combustion offers potential advantages over conventional power generation systems, particularly with respect to sulphur capture using injected limestone. The stone calcines on entry to the hot bed, forming CaO, and then reacts with SO2 to produce CaSO4. Regenerative schemes aim to reduce the sorbent loading by stripping off the sulphur from the spent limestone which is then reused. This subject of this dissertation is an investigation into the fundamentals of the regeneration of sulphated limestone by reductive decomposition. Following a detailed discussion of the thermodynamic limitations on the reaction system, attention is focussed on the kinetics of the reductive decomposition scheme. The results of a study on the reaction of CaSO4 powder with CO are reported. This made use of two experimental techniques, X-ray powder diffraction and thermogravimetric analysis. These experiments highlighted the major features of the reaction scheme and allowed the study of two special cases, the sulphidation of CaSO4 to produce CaS only and the solid-solid reaction between CaS and CaSO4. The major experimental technique used for this work was the batch addition of limestone to a fluidised bed. After a brief discussion of the results of sulphation experiments, typical regeneration experiments are described. By varying the test conditions as well as performing several special experiments, a mechanism for the overall reaction is deduced. The effect of the operating variables on the product split is then explicable. The evidence suggests that the closed pores resulting from the sulphation reaction lead to strong diffusion resistance on regeneration which controls the rate during the early and middle stages. By utilising high CO2 concentrations the formation of CaS was inhibited; the reaction was then amenable to quantitative analysis which revealed an approximate first order dependence on CO concentration and an activation energy of 110kJ/mol. One method for reducing the quantities of CaS produced is to operate the fluidised bed in a two-zone fashion i.e. with oxidising and reducing regions. An investigation into this reactor configuration is included with particular attention paid to the oxidation of CaS. The results obtained are explicable in terms of the results from the single zone bed and allow the effects of operating variables on the reactor performance to be predicted. Finally, the mathematical modelling of the gas-solid reactions is considered. The changing grain size model is introduced by considering the sulphation of limestone. The final conditions from this model then form the initial conditions for the regeneration model, which considers mildly reducing conditions only. The final model then uses as a basis the mechanism proposed in chapter 5 and is applied to the thermogravimetric analysis results.
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Mühlherr, Ingo H. "Nitrous oxide in British limestone aquifers." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389365.

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Hartshorn, Sarah Ann. "Sulphate attack of Portland limestone cements." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301594.

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Cheng, Ken. "Optical gradation for crushed limestone aggregates." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1753.

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Thesis (Ph. D.)--West Virginia University, 2000.
Title from document title page. Document formatted into pages; contains x, 179 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 149-153).
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Fretwell, Philip Nicholas. "Some aspects of intra-ooid microporosity in limestones." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321075.

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Kornmüller, Ulrich Christopher Robin. "Limestone dissolution kinetics in upflow reactor systems." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/17440.

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Waters derived from the Table Mountain sandstones are soft and acidic. Consequently they tend to be highly aggressive to cement materials and corrosive to metals. Full stabilization is normally effected using lime and carbon dioxide, this however is expensive and inappropriate in many rural areas. Partial stabilization effected by passing the water through limestone (calcium carbonate) granules appears to be a practical means of reducing aggression and corrosion problems associated with these waters. In this process calcium carbonate into the water increases the pH and the Alkalinity and calcium content. Feasibility of the process in part depends on the rate at which limestone dissolves into the water. This investigation addresses the problem of modelling the kinetics of the dissolution process and calibrating the model by experimentation.
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Mattar, Patrick. "Permeability of intact and fractured Indiana limestone." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86988.

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This thesis presents the laboratory techniques that were used to determine the permeability of intact and fractured Indiana Limestone. The cylindrical samples used in the experiments measured 100mm in diameter and 200mm in height with concentric axial cylindrical cavities of 23mm diameter along the entire length of the specimen. The permeability of the intact samples was determined by subjecting the sample to radial water flow until the inner pressure of the water-filled cavity reached a steady state. 6 to 18 tests were performed on each sample using different flow rates to obtain an average value of the permeability for each intact specimen of Indiana Limestone. The permeability of the intact specimens ranged from 0.9×10-15 m2 to 1.9×10-15 m2. A flat fracture perpendicular to the axis of the cylindrical samples was introduced; the change of the permeability of the fractured samples with quasi-cycled axial loading was determined. The same steady state constant flow test was used and the change in fracture aperture size was recorded. An initial increase in permeability of around 5 orders of magnitude was observed at the beginning of the first loading cycle and significant irreversible reductions of the fracture permeability were observed after each cycle. The fractures were finally sealed with anchoring gel epoxy and the permeability of the sealed samples was compared with those values for the intact samples.
Cette thèse présente les techniques expérimentales utilisées pour déterminer la perméabilité du Calcaire d'Indiana en état intact ainsi que fracturé. Des échantillons cylindriques de 200mm de longueur et de 100mm de diamètre avec des cavités concentrique axiales cylindriques de 23mm de diamètre étaient utilisés. La perméabilité des échantillons intacts a été déterminée en appliquant un écoulement d'eau radial à travers les spécimens jusqu'à l'obtention d'une pression de cavité interne constante. 6 à 18 tests ont été effectués sur chaque échantillon en utilisant plusieurs débits pour obtenir une valeur moyenne pour la perméabilité de chaque échantillon de Calcaire d'Indiana. La perméabilité des spécimens intacts obtenue s'étend entre 0.9×10-15 m2 et 1.9×10-15 m2. Une fracture perpendiculaire à l'axe des spécimens cylindriques a été introduite et le changement de la perméabilité à cause d'efforts quasi-cycliques a été déterminé. Le même genre d'expériences (débit constant) utilisé avec les échantillons intacts a été utilisé avec les échantillons fracturés et le changement de la taille des fractures a été enregistré aussi. La perméabilité des spécimens fracturés augmenta d'environ 5 ordres de magnitude au début du premier cycle d'effort appliqué et une chute irréversible de la perméabilité des fractures a été remarquée à la suite de chaque cycle. Finalement, les fractures ont été scellées avec de l'époxy pour ancrage et la perméabilité des échantillons "intacts" a été comparée avec la perméabilité initialement obtenue des échantillons de Calcaire d'Indiana.
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Antill, Sarah. "A computer simulation of limestone weathering mechanisms." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391015.

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Summers, S. A. "Calcination of limestone for basic oxygen steelmaking." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639134.

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Efficient basic oxygen steelmaking (BOS) depends on the rapid formation of a highly basic slag and, hence, on the properties of the lime (CaO) added as a flux during BOS converter operation. To evaluate the factors influencing the quality of lime supplied to the steelplants at Port Talbot and Llanwern, laboratory studies and plant trials were undertaken on limestone samples from two different quarries at Shapfell and Batts Combe. Despite significant differences in the microstructures of the two limestones, the rates of weight loss with time were similar at the same calcination temperatures, as was the average crystal size for the lime-crystal aggregates produced under the identical calcination conditions. Moreover, the predicted rates of slag formation appeared comparable, as judged by the results derived from water reactivity tests completed for lime obtained under a wide range of calcination conditions for both limestone samples. In contrast, for equivalent calcination treatments, the porosity values and the amounts of fines generated during abraidability tests were lower for lime samples derived from Shapfell than from Batts Combe limestone. Although the commercial limes supplied from both sources meet the composition specifications set by British Steel, it is proposed that the higher impurity levels in the Shapfell limestone create larger quantities of intergranular viscous silicates during calcination, improving the sintering characteristics of the calcined lime. This view is supported by the observation that, during calcination of Batts Combe limestone, surface 'doping' of the lime with sodium carbonate resulted in a discernible reduction in the percentage of fines generated during subsequent abraidability experiments. In line with the laboratory-based results, plant trials indicated that the slag/metal distributions of sulphur and phosphorous, as well as slag basicities were comparable for commercial lime from the two suppliers. However, in agreement with the abraidability data, dust losses from the converters were substantially greater using the Batts Combe lime.
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Books on the topic "Limestone"

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Geology, Jharkhand (India) Directorate of. Limestone mineral. Ranchi: Department of Mines & Geology, Directorate of Geology, 2010.

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Gallant, Roy A. Limestone caves. New York: F. Watts, 1998.

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M, Clayton Keith, ed. Limestone geomorphology. London: Longman, 1985.

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Thom, Tim. Limestone pavement. Settle, North Yorks: DalesCountry in assoc. with Yorkshire Dales National Park Authority, 2005.

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Norm, Shires, and Gilford Jim, eds. Limestone legends. Mechanicsburg, PA: Stackpole Books, 1997.

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Reagan, William F. Limestone County. Charleston, South Carolina: Arcadia Publishing, 2013.

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Davis, Wendy. Limestone cave. New York: Children's Press, 1997.

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Zetlin, Liz. Limestone ghazals. Markdale, Ont: Always Press, 2005.

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ArupScotland and Edinburgh (Scotland) City Council, eds. Gilmerton limestone, Moredunvale: Report on underground limestone mining. South Queensferry: Ove Arup & Partners Scotland Ltd, 2001.

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ArupScotland and Edinburgh (Scotland) City Council, eds. Gilmerton limestone - Hyvots: Report on underground limestone mining. South Queensferry: Ove Arup & Partners Scotland Ltd, 2001.

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Book chapters on the topic "Limestone"

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Marker, Brian R. "Limestone." In Encyclopedia of Earth Sciences Series, 1–3. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-12127-7_188-1.

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Ramezanianpour, Ali Akbar. "Limestone." In Springer Geochemistry/Mineralogy, 299–325. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36721-2_7.

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Gooch, Jan W. "Limestone." In Encyclopedic Dictionary of Polymers, 427. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_6916.

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Marker, Brian R. "Limestone." In Encyclopedia of Earth Sciences Series, 587–89. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73568-9_188.

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Geyssant, Jacques. "Limestone deposits." In Calcium Carbonate, 31–51. Basel: Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8245-3_3.

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"limestone." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 801. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_121409.

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"Limestone." In Encyclopedia of Astrobiology, 1388. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_100647.

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"Limestone." In Encyclopedia of Astrobiology, 926. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_2683.

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"Limestone." In Encyclopedic Dictionary of Polymers, 575. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_6807.

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"Limestone." In Dictionary of Geotourism, 348. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2538-0_1400.

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Conference papers on the topic "Limestone"

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Lezhava, Zaza, Lasha Asanidze, Kukuri Tsikarishvili, Tamaz Karalashvili, and Tamar Tolordava. "SPELEO-GEOMORPHOLOGICAL AND GEOPHYSICAL INVESTIGATIONS IN THE SOUTHERN PART OF THE ASKHI LIMESTONE MASSIF, GEORGIA, CAUCASUS." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023/1.1/s01.20.

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Georgia is a mountain country, located in the Caucasus region, where carbonate rocks are frequent and geographically well-distributed across the country. The aim of this paper is to introduce the main results of speleo-geomorphological and geophysical investigation conducted in the southern part of the Askhi Limestone Massif (namely Turchu Limestone Polje). Based on the complex studies, karst forms such as sinkholes and ponors were identified, the width of the Quaternary deposits located on the limestones was determined, the average and maximum discharges of the streams flowing on the bottom of the polje were calculated. The closed shape of the Turchu limestone polje and the limestone bottom covered with Quaternary sediments indicate the corrosive origin of the polje, which has been practically confirmed by our georadiological and electrometric studies. It seems that the evolution of the polje is actively taking place in the limestones under the Quaternary sediments and the dissolved material was being removed and is still being done through underground karst ways (underground corrosion). It is notable that the role of tectonic movements in the origin of the polje along with the corrosive processes, which had a periodic character and together with the uplifting of the area caused the lowering of the levels of underground waters and, consequently, the activation of karst processes.
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S., Tserenbaljid, Chadraabal Sh., and Namjildorj B. "Activation of Limestone Decomposition." In NANOMATERIALS AND TECHNOLOGIES-VI. Buryat State University Publishing Department, 2016. http://dx.doi.org/10.18101/978-5-9793-0883-8-204-205.

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Brown, Alton. "Delaware (lamar) Limestone roadcut." In 57th Annual Fall Field Conference. New Mexico Geological Society, 2006. http://dx.doi.org/10.56577/ffc-.73.

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Leal, Jose, Rubys Hernandez, Jose Romero, and Pablo Flores. "First Integrated Petrophysical Characterization in Limestone in Ecuador: M1 and M2 Limestones, Puma Field." In SPE Latin American and Caribbean Petroleum Engineering Conference. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/177165-ms.

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Gugule, Sanusi, Deitje Adolfien Katuuk, Feti Fatimah, and Chaleb Paul Maanari. "Characterization of Calcined Lobong Limestone." In Unima International Conference on Science and Technology 2022. Switzerland: Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-67y2nb.

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This study aims to produce and characterize CaO (calcium oxide) from limestone, a natural product of Lobong Village. Calcination is the thermal decomposition of limestone to remove carbon so that it can produce calcium oxide. One of the functions of CaO is as an eco-friendly catalyst that does not produce toxic or hazardous waste and can be reused. CaO resulting from the calcination process at a temperature of 900°C for 1.5 h was characterized using XRD, SEM, FTIR, and EDS. XRD analysis of calcined limestone produced 2θ (h k l) diffraction peaks, namely 32.228o (1 1 1), 37.389o (2 0 0), 53.864o (2 2 0), 64.169o (3 1 1), and 67.404o (2 2 2) which indicates the dominance of CaO. SEM analysis shows that the morphological structure of Lobong limestone after calcination is more porous than before. Studies by FTIR show that the chemical bonds of carbonate groups in the calcined limestone are decreasing. EDS analysis also shows that the mapping of carbon, which forms carbonates in calcined limestone, is decreasing.
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Kalbekov, A., M. Naumann, L. Duranti, and M. Prasad. "Poroelastic Properties of Indiana Limestone." In 58th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2024. http://dx.doi.org/10.56952/arma-2024-0025.

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ABSTRACT: This research investigates the poroelasticity of Indiana Limestone, focusing on how confining and pore pressures affect properties like porosity, permeability, and wave velocities. We analyzed the dynamic and static stiffnesses, highlighting the influence of hydraulic properties on rock elasticity. Findings indicate that, for this set of rocks, higher permeability possess greater stiffness and faster velocities, due to improved grain cementation and lower surface areas per grain volume. Additionally, we discovered a linear relationship between dynamic and static effective stress coefficients. A significant outcome is the stress dependency on Biot's coefficient, with considerable changes observed after a 20 MPa differential pressure change, underscoring the necessity for pressure-adjusted estimations rather than utilizing a constant value for a rock as per industry standards. Moreover, our experiments show that deionized water interaction softens the carbonate's matrix, challenging traditional fluid substitution models like Gassmann's in predicting rock stiffness accurately. 1. INTRODUCTION Classical elasticity theory does not completely explain the behaviors of petroleum and CO2 reservoirs due to the presence of pore fluids and changing boundary conditions that affect the mechanics of porous rocks (Detournay & Cheng, 1993). A porous medium saturated with fluid is composed of a solid matrix and interstitial fluid, which coexist and interact in the following ways: (1) an increase in pore pressure when external force is applied, and the fluid is trapped within the system; and vice-versa, (2) dilation of the system in response to applied internal pore pressure (Detournay & Cheng, 1993). In the realm of infinitesimal deformations, solids are regarded as elastic entities (Gassmann, 1951a; 2007). The dynamics of an isotropic porous material subjected to diverse stresses are encapsulated by strains, as elucidated by Nur and Byerlee (1971): (equation) In this context, σij represents Kroenecker's delta, and the notation of repeated indices implies a summation, with σkk representing the hydrostatic stress. The right-hand side of the equation is divided into three distinct parts: the first part reflects the rock's response to deviatoric stresses, which is strictly controlled by the shear modulus G. The middle part describes the deformation resulting from hydrostatic compression, characterized by the bulk modulus K. The third part illustrates the dilation of the porous rock due to variations in pore pressure, with 1/Kbp representing the poroelastic expansion coefficient, also known as the pseudo-bulk modulus (Biot, 1941). This approach uses a sign convention in which compression is considered positive.
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Verberne, B. A., A. J. van der Linden, K. El Azouzi, T. K. T. Wolterbeek, R. van Schalm, and A. Coorn. "Effects of Rapid Cooling and CO2 Depressurization on the Compressive Strength of Limestone." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0609.

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ABSTRACT CO2-injection into depleted reservoirs can lead to rapid cooling and a CO2 phase change in the near-wellbore region, potentially affecting rock mechanical integrity. We report unconfined compressive strength (UCS) and thick-walled cylinder (TWC) collapse strength tests on dry and brine-saturated limestones subjected to cooling (ΔT) or CO2 depressurization (ΔP). Plug samples were prepared from Indiana limestone and a limestone from the Green River Formation, outcropping in Sanpete Valley, Utah, USA. The ΔT-treatment consisted of a thermal shock from 60°C to −78°C, while the ΔP-treatment consisted of three cycles of rapid depressurization from ∼9 MPa CO2 pressure to atmosphere. The ΔP-treatment was performed at room temperature and at 60°C. The results show that dry samples are generally stronger than their brine-saturated counterparts, while effects from ΔT- or ΔP-treatment on rock strength or stiffness are indiscernible. Based on our findings on the Indiana and Green River Formation limestones, we suggest that CO2-injection-induced cooling or depressurization in limestone reservoirs can lead to strengthening of desiccated regions with negligible negative impact on rock mechanical integrity. INTRODUCTION Carbon capture and storage (CCS) is a key strategy on the way to a net-zero CO2-emissions industry, including in carbonate reservoirs, which constitute vast potential storage volumes (e.g., Bonto et al., 2021). However, large-scale implementation of CCS will only be viable if operational risks are understood and mitigated. One of the important geomechanical concerns for geological CO2 sequestration are thermal stress effects due to injection of relatively cold CO2 (Rutqvist, 2012; Roy et al., 2018). Especially in cases where the reservoir (residual) pore pressure is substantially lower than the intended CO2 supply pressure (typically >7 MPa), adiabatic, isenthalpic expansion of CO2 in the near-wellbore region can lead to sharp temperature drops, possibly even reaching below freezing conditions (Oldenburg, 2007; Mathias et al., 2010). Rapid temperature changes can result in thermal strains, fracturing, and, potentially, loss of containment (Pašić et al., 2007; Wang et al., 2022).
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Fitzpatrick, Andrew, Kevin Cahill, and Timothy Munday. "Magnetic Resonance Soundings and NMR Logging of a Limestone Aquifer‐ The Tamala Limestone, Western Australia." In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2011. Environment and Engineering Geophysical Society, 2011. http://dx.doi.org/10.4133/1.3614235.

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Liu, Sheng-Yu, Pei Liu, Jin Gao, Jian-ying Liu, Zhi-xiang Ye, and Cheng-Hua Xu. "Simulation Studies on Limestone Dissolution with Organic Acid Additives in Limestone-Based Flue Gas Desulfurization." In 2008 2nd International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2008. http://dx.doi.org/10.1109/icbbe.2008.476.

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Al-Aruri, A. D., and P. R. Sarkar. "Limestone Reservoir Development: A Simulation Approach." In Middle East Oil Show. Society of Petroleum Engineers, 1987. http://dx.doi.org/10.2118/15703-ms.

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Reports on the topic "Limestone"

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Andrews, P. R. A., and A. Vagt. Limestone, calcite and lime. Natural Resources Canada/CMSS/Information Management, 1993. http://dx.doi.org/10.4095/328641.

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Fenouil, Laurent A. Structural studies in limestone sulfidation. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10178157.

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Kalmanovitch, D. P., V. V. Razbin, E. J. Anhthony, D. L. Desai, and F D Friedrich. Microstructural characteristics of AFBC limestone sorbent particles. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/302599.

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Juday, G. P. Alaska research natural areas: 2. Limestone jags. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1989. http://dx.doi.org/10.2737/pnw-gtr-237.

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Henning, Stanley. Limestone Sources and Crop and Soil Responses. Ames: Iowa State University, Digital Repository, 2005. http://dx.doi.org/10.31274/farmprogressreports-180814-2464.

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Oneschuk, D., M. Coyle, and R. Dumont. Residual magnetic total field, Limestone Rapids, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2003. http://dx.doi.org/10.4095/214853.

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Barrett, Timothy, Hongfang Sun, and W. Jason Weiss. Performance of Portland Limestone Cements: Cements Designed to Be More Sustainable That Include up to 15% Limestone Addition. Purdue University, December 2013. http://dx.doi.org/10.5703/1288284315335.

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Lau, I. T., D. T. Liang, L. Jia, and E. J. Anthony. Circulating fluidized bed combustion characteristics of Suncor limestone. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/304570.

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Katsube, T. J., G. M. LeCheminant, J. B. Percival, N. Scromeda, D. Walker, and Y. Das. Petrophysical testing of limestone samples from former Yugoslavia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207484.

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Gunning, M. H. Carboniferous limestone, Iskut River Region, Northwest British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/132820.

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