Search academic texts

Information × Registration Number 0309U004102, 0108U000835 , R & D reports Title Production technology reprocessing of corundum and fire clay concrete mixes, products on their basis and pilot batches output. popup.stage_title Доробка технології виготовлення корундової та шамотної бетонних сумішей, виробів на їх основі та випуск дослідних партій. Head Soloshenko L., Registration Date 16-02-2009 Organization The open joint stock company " The Ukrainian research institute of refractories named A.S.Berezhnoy" popup.description2 The research subject is corundum and fire clay concrete mixes, products on their basis. The purpose of the work is production technology reprocessing of corundum and fire clay concrete mixes. The research methods are physicochemical, petrographic, electronic microscopic, physical- mechanical and thermo-mechanical ones. The researches of the influence of type and quantity of plasticizing additions of "СП-7Мс" and "СП-7Мл" on the properties of corundum ("СКпл-50-94" and "СКпл-60-94") and fire clay ("СШБ") concrete mixes have been carried out. It has been determined, that the use of the plasticizing addition of "СП-7Мл" in the optimum quantity in the composition of corundum of "СКпл-50-94" and fire clay "СШБ" concrete mixes allows decreasing water requirement of the concrete mixes (~ by 30 %), increasing strength of samples, produced from the indicated concretes, after hardening during 24 h and high temperature treatment ~ 2-2,2 times more and ~ 1,4-1,6 times more, correspondingly, and decreasing open porosity ~ 1,1 times less. The comparative researches of the influence of plasticizing additions of "СП-7Мл" and threepolyphosphate of sodium (Na5P3O10), as well as complex addition of Na5P3O10 and oxalic acid, on the properties of samples from corundum of "СКпл-60-94" and fire clay "СШБ" concrete mixes, which used for manufacture of refractory products, have been carried out. It has been determined the possibility of application of plasticizing addition of "СП-7Мл" or complex addition of Na5P3O10 and oxalic acid, as well as traditionally applied addition of Na5P3O10, in the composition of the concretes, which used for manufacture of refractory products. The presence of addition of "СП-7Мл" or complex addition of Na5P3O10 and oxalic acid in the composition of the indicated concrete mixes allows, without worsening of the samples properties, increasing flow of the concrete mixes ~ 1,4-1,5 times more in comparison with flow of the concrete mixes, which contain the addition of Na5P3O10; ensures the filling of form in the inaccessible places and allows reducing labor expenses on the manufacture of refractory products. The use of the above indicated additions allows to broaden of raw material base for production of the concrete mixes. In accordance with the existing normative documentation in OJSC "The Ukrainian research institute of refractories named after A.S. Berezhnoy" the pilot batches of corundum of"СКпл-50-94", "СКпл-60-94" and fire clay of "СШБ" concrete mixes and products on their basis, which are intended to customers, have been produced. The work shall be continued in the line of further improvement of production technology of concrete mixes with the content of CaO not less than 3 wt. %, including the use of new plasticizing additions. Product Description popup.authors popup.nrat_date 2020-04-02 Close