PL97654B1 - METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH - Google Patents

METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH Download PDF

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Publication number
PL97654B1
PL97654B1 PL18728876A PL18728876A PL97654B1 PL 97654 B1 PL97654 B1 PL 97654B1 PL 18728876 A PL18728876 A PL 18728876A PL 18728876 A PL18728876 A PL 18728876A PL 97654 B1 PL97654 B1 PL 97654B1
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PL
Poland
Prior art keywords
fly ash
basis
concrete produced
cellular concrete
phosphogypsum
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PL18728876A
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Polish (pl)
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Priority to PL18728876A priority Critical patent/PL97654B1/en
Publication of PL97654B1 publication Critical patent/PL97654B1/en

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Description

Przedmiotem wynalazku jest sposób wytwarzania betonu komórkowego produkowanego na bazie popio¬ lów lotnych.Znany sposób wytwarzania betonu komórkowego na bazie popiolów lotnych polega na tym, ze czesc kruszywa jakim jest popiól lotny nie mielony miesza sie w odpowiednich proporcach wagowych z rozdrobnio¬ nym spoiwem hydraulicznym o skladzie: popiól lotny, stanowiacy pozostala czesc kruszywa, wapno, cement i kamien gipsowy oraz z woda i srodkiem spulchniajacym, a nastepnie mase poddaje sie odpowiednim metodom dojrzewania i utwardzania.Stosowanie kamienia gipsowego, który jest jednym z podstawowych surc vców do produkgi betonu komórkowego wedlug znanych sposobów, konieczny jest z uwagi na role jaka on odgrywa w przebiegu procesu technologicznego, gdzie jest regulatorem czasu wyrastania i wiazania masy a ponadto jest skladnikiem zapew¬ niajacym prawidlowa wytrzymalosc, wplywa na zmniejszenie skurczu i poprawe mrozoodpornosci betonu komórkowego produkowanego na bazie popiolów lotnych.Stosowany kamien gipsowy charakteryzuje sie stosunkowo niska jakoscia — zanieczyszczony jest glina i ziemia ajego wilgotnosc czesto przekracza 10% (wymagana max. 5%). Duza wilgotnosc powoduje trudnosci w dozowaniu gipsu, hydratacje wapna przy przemiale w mlynie i szkodliwe podwyzszenie temperatury mieszanki spoiwowej.Celem wynalazku jest wyeliminowanie wyzej wymienionych wad i niedogodnosci.Stwierdzono, ze stosowanie do produkcji betonu komórkowego na bazie popiolów lotnych fosfogipsu — - odpadu powstajacego przy produkcji nawozów fosforowych pozwoli na wyeliminowanie uciazliwych dla zakladów zaburzen technologicznych oraz wplynie na generalna poprawe jakosci gotowych wyrobów, ponadto pozwoli na zmiane procesu technologicznego, polegajacego na znacznym uproszczeniu ciagu gipsu przez wyeliminowanie ciagu kruszenia i wspólnego przemialu z innymi skladnikami spoiwa, co z kolei wplynie nzwiekszenie wydajnosci mlynów.Zgodnie z wynalazkiem bezposrednio do mieszarki do wody zarobowej wprowadza sie fosfogips przed wprowadzeniem do mieszarki kruszywa oraz mieszanki spoiwowej skladajacej sie z popiolów lotnych, cementu i wapna. Fosfogips wprowadza sie w postaci sypkiej lub jako szlam tzn. mieszanine fosfogipsu z woda.2 97 654 Fosfogips charakteryzuje sie bardzo wysoka mialkoscia rzedu 3500-5000 cm2/g. Powstaje on jako odpad przy produkcji nawozów fosforowych z aparytów i fosforytów w wyniku dzialania na nie kwasem siarkowym wg schematu: Ca10F2(PO4)2 + 10H2SO4 + 10nH2O 6H3P04 + 10CaSO4 • nH20 + 2HF gdzie:n = 0, 1/2 lub 2 Ilosc odpadów jest znaczna* 5k najedna tone kwasu* fosforowego powstaje 5,5 tony fosfogipsu. Sa to odpady uciazliwe, stanowiace zagrozenie dla srodowiska.W procesie technologicznym produkcji betonu komórkowego na bazie popiolów lotnych fosfogips wprowadzanyjestjako szlam o odpowiednim ciezarze objetosciowynj lub w postaci sypkiej (wysuszony) wedlug okreslonych recept bezposrednio do mieszarki zarobów, gdzie mieszany jest z innymi skladnikami. PLThe subject of the invention is a method of producing aerated concrete produced on the basis of fly ash. The known method of producing aerated concrete based on fly ash consists in the fact that a part of the aggregate, which is unground fly ash, is mixed in appropriate proportions by weight with a fine hydraulic binder of composition: fly ash, which is the remainder of the aggregate, lime, cement and gypsum stone as well as with water and a raising agent, and then the mass is subjected to appropriate maturation and hardening methods. The use of gypsum stone, which is one of the basic raw materials for the production of cellular concrete according to of known methods, it is necessary due to the role it plays in the course of the technological process, where it is a regulator of the time of rising and bonding of the mass, and moreover, it is a component that ensures proper strength, reduces shrinkage and improves frost resistance of aerated concrete produced on the basis of fly ash. Pile The important gypsum stone is characterized by a relatively low quality - clay and soil are contaminated and its humidity often exceeds 10% (required max. 5%). High humidity causes difficulties in gypsum dosing, lime hydration during grinding in the mill and harmful increase of the temperature of the binder mixture. The aim of the invention is to eliminate the above-mentioned disadvantages and inconveniences. It has been found that the use of phosphogypsum - - waste generated during production in the production of aerated concrete based on fly ash phosphorus fertilizers will eliminate technological disturbances that are burdensome for plants and will affect the overall improvement of the quality of finished products, moreover, it will allow for a change in the technological process, consisting in a significant simplification of the gypsum sequence by eliminating the process of crushing and co-grinding with other binder components, which in turn will increase the efficiency According to the invention, phosphogypsum is introduced directly into the mixing water mixer before the aggregate and the binder mixture consisting of fly ash, cement and lime are introduced into the mixer. Phosphogypsum is introduced in loose form or as a slurry, i.e. a mixture of phosphogypsum with water.2 97 654 Phosphogypsum is characterized by a very high fineness of the order of 3500-5000 cm2 / g. It is generated as waste in the production of phosphorus fertilizers from aparites and phosphates as a result of treating them with sulfuric acid according to the scheme: Ca10F2 (PO4) 2 + 10H2SO4 + 10nH2O 6H3P04 + 10CaSO4 • nH20 + 2HF where: n = 0, 1/2 or 2 waste is considerable * 5k per one ton * of phosphoric acid, 5.5 tonnes of phosphogypsum are produced. These are burdensome waste, posing a threat to the environment. In the technological process of cellular concrete production based on fly ash, phosphogypsum is introduced as a sludge with an appropriate volumetric weight or in a loose (dried) form according to specific recipes directly into the mixing mixer, where it is mixed with other ingredients. PL

Claims (2)

Zastrzezenia patentowe 1. Sposób wytwarzania betonu komórkowego produkowanego na bazie popiolów lotnych, znamien¬ ny tym, ze stosuje sie dodatek fosfogipsu, który przed wprowjadzeniem do mieszarki kruszywa oraz mieszanki spoiwowej, skladajacej sie z popiolów lotnych, cementu i wapna, wprowadza sie bezposrednio do mieszarki do wody zarobowej.Claims 1. The method of producing aerated concrete produced on the basis of fly ash, characterized by the use of a phosphogypsum additive, which, before being introduced into the mixer, of the aggregate and the binder mixture, consisting of fly ash, cement and lime, is introduced directly into the mixer for mixing water. 2. Sposób wedlug zastrz. 1,znamienny tym, ze fosfogips stosuje sie w postaci sypkiej lub szlamu. i Prac. Poligraf. UP PRL naklad 120+18 Cena 45 zl PL2. The method according to claim The process of claim 1, wherein the phosphogypsum is used in the form of a loose or slurry. and Prac. Typographer. UP PRL, circulation 120 + 18 Price PLN 45 PL
PL18728876A 1976-02-18 1976-02-18 METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH PL97654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18728876A PL97654B1 (en) 1976-02-18 1976-02-18 METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL18728876A PL97654B1 (en) 1976-02-18 1976-02-18 METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH

Publications (1)

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PL97654B1 true PL97654B1 (en) 1978-03-30

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PL18728876A PL97654B1 (en) 1976-02-18 1976-02-18 METHOD OF MANUFACTURING CELLULAR CONCRETE PRODUCED ON THE BASIS OF FLY ASH

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