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NOx photocatalytic degradation on gypsum plates modified by TiO2-N,C photocatalysts

–245. DOI: 10.1016/j.conbuildmat.2011.10.047. 14. Yousefi, A., Allahverdi, A. & Hejazi, P. (2013). Effective dispersion of nano-TiO 2 powder for enhancement of photocatalytic properties in cement mixes. Constr. Build. Mater. 41, 224–230. DOI: 10.1016/j.conbuildmat.2012.11.057. 15. Pereira, A., Palha, F., Brito, J. & Silvestre, J.D. (2011). Inspection and diagnosis system for gypsum plasters in partition walls and ceilings. Constr. Build. Mater. 25(4), 2146–2156. DOI: 10.1016/j.conbuildmat.2010.11.015. 16. U.E., Directive 2008/50/EC of the European

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A Method for Optimizing Lightweight-Gypsum Design Based on Sequential Measurements of Physical Parameters

R eferences [1] Firestone, M.A., Hayden, S.C., Huber, D.L. (2015). Greater than the sum: Synergy and emergent properties in nanoparticle-polymer composites. MRS Bulletin , 40 (9), 760-767. [2] Stefanou, G., Sawas, D., Papadrakakis, M. (2015). Stochastic finite element analysis of composite structures based on material microstructure. Composite Structures , 132, 384-392. [3] Arikan, M., Sobolev, K. (2002). The optimization of a gypsum-based composite material. Cement and Concrete Research, 32 (11), 1725-1728. [4] Böse, H., Hurbanic, M

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Preliminary studies of photocatalytic activity of gypsum plasters containing TiO2 co-modified with nitrogen and carbon

. (2012). Improvement of gypsum plaster strain capacity by the addition of rubber particles from recycled tyres. Constr. Build. Mater. 35, 633-641. DOI: 10.1016/j.conbuildmat.2012.04.093. 32. Pereira, A., Palha, F., de Brito, J. & Silvestre, J.D. (2011). Inspection and diagnosis system for gypsum plasters in partition walls and ceilings. Constr. Build. Mater. 25, 2146-2156. DOI: 10.1016/j.conbuildmat.2010.11.015. 33. Asahi, R., Morikawa, T., Ohwaki, T., Aoki, K. & Taga Y. (2001). Visible-light photocatalysis in nitrogen-doped titanium

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Utilization of waste gypsum in fertilizer production

Abstract

The results of the study regarding utilization of the waste gypsum formed as a by-product during the production of the magnesium sulphate from dolomite have been presented. The use of this waste have been proposed for the production of granulated multi-component fertilizers containing 25% N; 8% S; 14% CaO and 3.5% MgO. In the process of fertilizer production, the urea which will be bounded with the calcium and magnesium sulphate from the waste in the form of adducts of CaSO4 . 4CO(NH2)2 and MgSO4 . CO(NH2)2 . 3H2O will be the source of nitrogen in the fertilizer. It has been stated on the basis of the laboratory tests that the fertilizer with the assumed composition can be obtained by means of granulation of the raw material pulp, along with the dried and ground product return. The possibility of the production of the fertilizer with good physical properties according to the assumed concept has been confirmed in the pilot scale

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Environmental Efficiency of Industrial Symbiosis – LCA Case Study for Gypsum Exchange

Abstract

A review of the available literature concerning environmental impact assessment for industrial symbiosis has been carried out. The authors have recommended the use of life cycle assessment method for this purpose. It was stated that so far few studies presenting LCA results of industrial symbiosis have been published. Among the factors which contribute to the success of symbiotic exchange, the close location of collaborating companies has been often mentioned. This paper presents LCA results concerning the environmental impact of symbiotic gypsum transmission. Concepts of relative distance and critical distance for the case of industrial symbiosis were proposed and defined. Significant difference between critical distance obtained for particular endpoints were observed (3.5- 564 km). Application of Life Cycle Sustainability Triangle enabled the estimation of critical distance taking into account various impact categories. A sensitivity analysis indicated the relationship between critical distance and the means of transport which reflected the effect of scale. The critical distance determined for heavy trucks was 3.2 - 3.9 times longer than in case of lighter vehicles.

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Effect Of Coir Fibres On The Compaction And Unconfined Compressive Strength Of Bentonite-Lime-Gypsum Mixture

Abstract

This paper presents the effect of coir fibres on the compaction and unconfined compressive strength of a bentonite-lime-gypsum mixture. The coir fiber content varied from 0.5 to 2 %. The results indicated that the dry unit weight and the optimum moisture content of a bentonite – lime mix increased with the addition of gypsum. The unconfined compressive strength of the bentonite increased with the increase in the lime content up to 8 %. Beyond 8 %, the unconfined compressive strength decreased. The dry unit weight of the reference mix decreased, and the optimum moisture content increased with the addition of coir fibre. The unconfined compressive strength of the bentonite + 8 % lime mix increased up to 4 % with the gypsum. Beyond 4 %, the unconfined compressive strength decreased. The unconfined compressive strength of the reference mix increased with the addition of coir fibre up to a fibre content of 1.5 %. The unconfined compressive strength of the reference mix-coir fibre composite was less in comparison to the reference mix. The unconfined compressive strength of the bentonite increased with the addition of lime and gypsum and with the increase in the curing period. The improvement in the post-peak region was better for the reference mix with reinforced coir fibres as compared to the unreinforced reference mix. The improved post-peak behaviour of the bentonite-lime-gypsum-coir fibre mixture could boost the construction of temporary roads on such problematic soils. Further, its use will also provide an environmental motivation for providing a means of consuming large quantities of coir fibres.

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Influence of biomass ash, lime and gypsum fertilization on macro- and microelement contents in the soil and grains of spring wheat

Abstract

The addition of lime and gypsum to wood ash and straw ash were used in the studies. The subject of the study was estimation of the fertilization effect of biomass, ash, gypsum and lime on the content of macro- and microelements in soil and grain of spring wheat. The experiment was carried out in 2016 in the West Pomeranian Voivodeship in Poland. The study compared three factors: wood ash of deciduous and coniferous trees and cereal straw ash (I. factor), two types of ash additions: lime or gypsum (mixture composition: 60% ash and 40% lime or gypsum) (II. factor), three doses of ash with lime or gypsum mixture: 2, 4, 6 Mg·ha−1 and control (III. factor). The analysis of the microelements contents (copper, chromium, nickel and lead) in the soil shows that the application of fertilizer in a form of wood or straw ash as well as PROFITKALK lime or SulfoPROFIT gypsum did not exceed the threshold values for the soil from the first group of land specified in Regulation of the Minister of the Environment of September 1, 2016 on the manner of assessing the pollution of the earth’s surface. After application of biomass ashes (wood or straw) an increase of some macroelements (potassium, phosphorus and calcium) in the soil was observed. The experiment did not reveal any influence of applied fertilization in the form of wood or straw ash nor PROFITKALK lime nor SulfoPROFIT gypsum on changes in iron, manganese and zinc abundance in grains of spring wheat.

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Gypsic rendzinas of Nida Basin (southern Poland): a review

REFERENCES Barcicki M., 2004. Możliwości wykorzystania surowców siarczanowych Niecki Nidziańskiej. [In:] Perspektywy rozwoju regionu w świetle badań krajobrazowych (Strzyż M., red.) Problemy Ekologii Krajobrazu, PAEK, Kielce: 101–109 (in Polish with English abstract). Bąbel M., 1987. Giant gypsum intergrowths from the Middle Miocene evaporates of southern Poland. Acta Geologica Polonica 37: 1–21. Bednarz Z., 1987. Rejonizacja geobotaniczna Niecki Nidziańskiej. Studia Ośrodka Dokumentacji Fizjograficznej 15: 87–93 (in Polish with English abstract

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Comparison the Efficient Reclamation of Different Inorganic Materials with Organic Amendments to Rice-Wheat Crop Sustainable Production in Salt-Affected Soils

References Abd El-Hady, M. & Shaaban, S.M. (2010). Acidification of saline irrigation water as a water conservation technique and its effect on some soil properties. Am- Eurasian J. Agric. Environ. Sci., 7: 463-470. Abdel-Fattah, M.K. (2012). Role of gypsum and compost in reclaiming saline-sodic soils. J. Agric. Vet. Sci., 1: 30-38. Ahmad, M., Hussain, N., Salim, M. & Niazi, B.H. (2001). Use of chemical amendments for reclamation of saline-sodic soils. Int. J. Agri. Biol., 3 (3): 305-307. Ahmad

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Strategies for Soil Amelioration Using Sulphur in Salt Affected Soils

Abbreviations used: EC e (electrical conductivity of soil extract); pH s (pH of soil saturated past); SAR (sodium absorption ratio); SGR (soil gypsum requirement); S (sulfur); BCR (benefit: cost ratio) REFERENCES Abd El-Hady M., Shaaban S.M. 2010 - Acidification of saline irrigation water as a water conservation technique and its effect on some soil properties. Am. Eurasian J. Agric. Environ. Sci., 7: 463-470. Abdallah M., Dubousset L., Meuriot F., Etienne P., Avice J.C., Ourry A., 2010 - Effect of mineral sulphur availability on

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