Ashfilling binding material and concrete: structure, characteristic, ecological and economic aspects of the fabrication and use
V. I. Gots
Kiеv National University Civil Engineering Architecture
Annotation: The next sharpening the ecological problems of the Ukraine requires the development new efficient technology conversions wastes of heat power, presented by ash and slag, which provided the maximum degree to their reclamation and binding in qualitative building materials. The choice of technology for reclamation of wastes is dependent from such factor as their chemical, mineralogical and grinding compositions, value to specific surface and way of the removing. In spite of the fact that specified waste are broadly used for production of bindings systems of the different type such as pozzolanic cements, ash-sulphate cements, gypsum-ash-cement bindings material, alkaline ashes cements, the general volume to their reclamation remains very low. The share of the ash in such system usually does not exceed 25 35 %, but fabrication concrete product on their base requires additional power resources on heat processing. In work is considered possibility of the production of ashfilling binding and concrete that contains in its composition more 50 % ashes. It is shown that when entering the ash in composition concrete mixture amount her can be raised not only to account of the use the different type of activations, but also to account polifunctionality of ash. Its possible entering the ash in composition of binding system also as microfiller and small aggregate, will promote forming the more strong contact ash to account of the increase degree crystal-chemical similarity of new formation and relict reminder that do not yield to the hydration. In ditto time when use overweening amount ashes in composition ashfilling material can exist increasing to porosity and reduction of development strength at time that brings about reduction frost resistance and corrosion resistance. For avoiding of these phenomena's in composition concrete mixture together with raised by amount of the ash can be incorporated plasticizers additives with different mechanism of the action and complex additives that contains as organic, so and inorganic substances. The researches of operating characteristics of ashfilling concrete are indicative of efficiency change the Portland cement on designed compositions binding material (got with use of wastes of power station) which can be offered as alternative of Portland cement.
Keywords: ecology, pozzolanic additives
Pages: 87-93.
Link for citation: Gots, V. I. Ashfilling binding material and concrete: structure, characteristic, ecological and economic aspects of the fabrication and use. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2007. – Vol. 3, N 2. – Р. 87-93. – URL: https://donnasa.ru/publish_house/journals/spgs/2007-2/03_goc.pdf (date of access: 19.09.2024). (in Russian)
Vol. 3, N 2 (2007)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture