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Wpływ temperatury na właściwości spoiwa odzyskanego z odpadów betonowych

Gusev Boris, Samchenko Svetlana, Krivoborodov Yury

Cement Wapno Beton

2019

R. 22/84, nr 5

407--412

Recykling spoiwa i kruszywa drobnego z odpadów betonowych jest możliwy, po obróbce termicznej drobnej frakcji otrzymanej w procesie wytwarzania kruszywa grubego. Uzyskany tą metodą materiał trzeba prażyć w piecach, w temperaturze około 700°C, a następnie rozdrabniać w młynie kulowym, do uziarnienia typowego dla cementu. W zależności od rodzaju i klasy odpadowego betonu wyjściowego uzyskać można spoiwo, którego zaczyn będzie osiągał wytrzymałość od 10 MPa do 30 MPa.

Recycling of the binder and fine aggregate is possible after the thermal treatment of fine fraction, produced during the manufacture of coarse aggregates, from waste concrete. Recovered material is sintered in furnace at temperatures of about 700°C and then ground in a ball mill to a fineness of cement. Depending on the type of initial waste concrete a binder with the compressive strength of the paste from 10 MPa to 30 MPa, can be obtained. The paper presents the results of such binders production, from different class waste concrete.

The use of fine waste material for the future of sustainable construction

Kalinowska-Wichrowska K.

Technical Sciences / University of Warmia and Mazury in Olsztyn

2018

nr 21(2)

149--156

The article presents data regarding scale of current production of cement and its future of sustainable construction. In the time of sustainability and Union Directives which rightly impose the reduction of emission of greenhouse gases the solution has been proposed that may in some extent contribute to reducing the cement consumption by using properly prepared recycling binder as its substitute. Some results of own research have been presented, connected with the possibility of using the waste material in form of properly processed cement grout as a partial substitute of cement in the cement composites. Due to high content of contaminants in the industrial secondary binder, which might interfere with the uniformity of results, it has been decided to obtain the recycling binder in the laboratory conditions. The secondary mineral material has been obtained in the process of multi-stage disintegration of prepared laboratory samples, made from cement grouts. The prepared material has been analysed for content of dust fraction and pozzolana activity. The obtained results have revealed that in assumed conditions of recycling binder processing it may be successfully used as cement substitute in the cement composites.