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The findings of three laboratories confirm that the effectiveness of As removal from solutions is mainly dictated by the Fe:As molar ratio; concentration of As in the initial solution and of sulphate in the final solution also influence the process. Precipitation of sulphate ions as gypsum, using calcium hydroxide instead of sodium hydroxide, greatly improved As removal. The optimum pH value for precipitation depends on the Fe:As molar ratio of the initial solution, rising from pH 3 at molar ratio 2 to pH 5 at molar ratio 4 and pH 6 at molar ratio 6. The stability of ferric arsenate precipitates improves with increasing Fe:As molar ratio, though there were some differences in the observed pH ranges in which their stability was secured. Taking all available data into account, precipitates with molar ratios above 3 can be considered safe for disposal up to neutral values, while those with Fe:As molar ratios above 5.9 can be safely disposed of even at alkaline pH values., The findings of three laboratories confirm that the effectiveness of As removal from solutions is mainly dictated by the Fe:As molar ratio; concentration of As in the initial solution and of sulphate in the final solution also influence the process. Precipitation of sulphate ions as gypsum, using calcium hydroxide instead of sodium hydroxide, greatly improved As removal. The optimum pH value for precipitation depends on the Fe:As molar ratio of the initial solution, rising from pH 3 at molar ratio 2 to pH 5 at molar ratio 4 and pH 6 at molar ratio 6. The stability of ferric arsenate precipitates improves with increasing Fe:As molar ratio, though there were some differences in the observed pH ranges in which their stability was secured. Taking all available data into account, precipitates with molar ratios above 3 can be considered safe for disposal up to neutral values, while those with Fe:As molar ratios above 5.9 can be safely disposed of even at alkaline pH values.

A study was carried out of the effect of protective alkali on Ag extraction from refractory ores taken from the Kutahya-Gumuskoy region of Turkey and the behaviour of dissolved Ca2+ ions during cyanidation. High concentrations of protective alkali were shown to be beneficial in the cyanidation of these ores, in contrast to gold cyanidation where they prohibit gold dissolution. Calcium ions are advantageous in the cyanidation of sulphidic Ag ores since they prevent the detrimental effects of ions which hinder Ag dissolution and consume CN- ions. High concentrations of protective alkali was also found to decrease cyanide consumption., A study was carried out of the effect of protective alkali on Ag extraction from refractory ores taken from the Kutahya-Gumuskoy region of Turkey and the behaviour of dissolved Ca2+ ions during cyanidation. High concentrations of protective alkali were shown to be beneficial in the cyanidation of these ores, in contrast to gold cyanidation where they prohibit gold dissolution. Calcium ions are advantageous in the cyanidation of sulphidic Ag ores since they prevent the detrimental effects of ions which hinder Ag dissolution and consume CN- ions. High concentrations of protective alkali was also found to decrease cyanide consumption.

The adsorption of the anionic surfactant, disodium N-alkylsulphosuccinamate, onto polished apatite ore surfaces was studied by ellipsometry. Surfaces of varying porosities were created by partially dissolving planar apatite surfaces to different degrees in NaOH solution at pH 10.6. Partially dissolved apatite was optically modelled as a semi-infinite substrate with a porous surface layer. The porous layer varied in thickness from 0 to 550 angstroms and in the degree of porosity from 0 to 12 vol%. The adsorption of the surfactant in Ca(OH)2 solution on the non-porous surface resulted in the formation of a thin film about 40 angstroms thick which could be removed by flushing the measurement cell with fresh solution. Adsorption of the surfactant on the porous surfaces resulted in both reversible adsorption on the external surface and irreversible adsorption within the pores. The role of the pores in flotation is considered., The adsorption of the anionic surfactant, disodium N-alkylsulphosuccinamate, onto polished apatite ore surfaces was studied by ellipsometry. Surfaces of varying porosities were created by partially dissolving planar apatite surfaces to different degrees in NaOH solution at pH 10.6. Partially dissolved apatite was optically modelled as a semi-infinite substrate with a porous surface layer. The porous layer varied in thickness from 0 to 550 angstroms and in the degree of porosity from 0 to 12 vol%. The adsorption of the surfactant in Ca(OH)2 solution on the non-porous surface resulted in the formation of a thin film about 40 angstroms thick which could be removed by flushing the measurement cell with fresh solution. Adsorption of the surfactant on the porous surfaces resulted in both reversible adsorption on the external surface and irreversible adsorption within the pores. The role of the pores in flotation is considered.

Cemented filling materials in ore greatly affect the flotation of nickel sulphate minerals and reduce the recovery. Hydrated silica cement, in an unlimited quantity of water, can reduce the flotability of pyrite. Ca(OH)2 is the main component responsible for depressing nickel pyrite., Cemented filling materials in ore greatly affect the flotation of nickel sulphate minerals and reduce the recovery. Hydrated silica cement, in an unlimited quantity of water, can reduce the flotability of pyrite. Ca(OH)2 is the main component responsible for depressing nickel pyrite.

The rates of dissolution of Ca(OH)2 in the form of rotating discs have been studied in water and in aqueous calcium nitrate and sodium hydroxide solutions. The rates were found to be consistent with the rates of combined slaking and dissolution of CaO discs. A similar consistency was found between the rates of dissolution of powdered Ca(OH)2 and of powdered CaO in water. The results support a mechanism for CaO slaking. This indicates that under moderate agitation the overall rate is controlled by the diffusion of Ca2+ and OH- ions from the reacting surface. Under more vigorous agitation the dissolution of Ca(OH)2 at the surface controls the rate., The rates of dissolution of Ca(OH)2 in the form of rotating discs have been studied in water and in aqueous calcium nitrate and sodium hydroxide solutions. The rates were found to be consistent with the rates of combined slaking and dissolution of CaO discs. A similar consistency was found between the rates of dissolution of powdered Ca(OH)2 and of powdered CaO in water. The results support a mechanism for CaO slaking. This indicates that under moderate agitation the overall rate is controlled by the diffusion of Ca2+ and OH- ions from the reacting surface. Under more vigorous agitation the dissolution of Ca(OH)2 at the surface controls the rate.

The transport system developed to move lime hydrate from the AECI Midlands plant to the Rand Mines Milling and Mining Company is discussed., The transport system developed to move lime hydrate from the AECI Midlands plant to the Rand Mines Milling and Mining Company is discussed.

PPC Lime of Johannesburg supplies more than 60% of the lime consumed in South Africa. Two plants, Lime Acres and Marble Hall, are in production today. The excavated limestone is crushed in a qyratory crusher, then screened and stockpiled. Calcining of the limestone takes place in nine rotary kilns: the plant has an annual lime capacity of 2 000 000 tons. There is a trend towards ground unslated lime among those customers whose process can tolerate fines, as the material is unloaded pneumatically at destination. This is a clean and dust free operation. Calcium hydroxide in a powder form is also produced., PPC Lime of Johannesburg supplies more than 60% of the lime consumed in South Africa. Two plants, Lime Acres and Marble Hall, are in production today. The excavated limestone is crushed in a qyratory crusher, then screened and stockpiled. Calcining of the limestone takes place in nine rotary kilns: the plant has an annual lime capacity of 2 000 000 tons. There is a trend towards ground unslated lime among those customers whose process can tolerate fines, as the material is unloaded pneumatically at destination. This is a clean and dust free operation. Calcium hydroxide in a powder form is also produced.

During the caustic treatment of the wash waters in alumina production with calcium hydroxide, calcium carbonate is chemically precipitated. It has a highly developed active surface, the magnitude of which according to the BET method amounts to 4.8-5.2 m2/g. Its use as a sorbent for the impurities which retard the decomposition of the aluminate solutions has been studied. The impurities are primarily organic substances, SiO2 and Fe2O3., During the caustic treatment of the wash waters in alumina production with calcium hydroxide, calcium carbonate is chemically precipitated. It has a highly developed active surface, the magnitude of which according to the BET method amounts to 4.8-5.2 m2/g. Its use as a sorbent for the impurities which retard the decomposition of the aluminate solutions has been studied. The impurities are primarily organic substances, SiO2 and Fe2O3.

Results from investigations into the electrochemical behaviour of chalcocite, chalcopyrite, pyrrhotite, and pyrite in solutions of sulphuric acid in twice-distilled water (pH5) and calcium hydroxide at pH6-12, are discussed. The averaged E,t curves recorded for the sulphide minerals are given. The curves differ in nature for all the investigated minerals. The obtained relationship between the potentials at the beginning of oxidation of the various sulphides and the pH value can in turn serve as the basis of an explanation for the mutual effect of the sulphides during flotation., Results from investigations into the electrochemical behaviour of chalcocite, chalcopyrite, pyrrhotite, and pyrite in solutions of sulphuric acid in twice-distilled water (pH5) and calcium hydroxide at pH6-12, are discussed. The averaged E,t curves recorded for the sulphide minerals are given. The curves differ in nature for all the investigated minerals. The obtained relationship between the potentials at the beginning of oxidation of the various sulphides and the pH value can in turn serve as the basis of an explanation for the mutual effect of the sulphides during flotation.

The volume contains 31 papers under the following session headings: arsenic control and disposal, silica control, impurity removal in refining, and thiosalt control. The aqueous chemistry of arsenic in relation to hydrometallurgical processes, the use of calcium compounds to remove arsenic and the formation and environmental safety of iron-arsenic compounds are examined. Arsenic management, control and treatment at Key Lake, Barberton, Equity Silver, Con and the Port Hope uranium refinery are detailed. Silica control in the Bayer Process, ion exchange, carbon in pulp and solvent extraction circuits, and thiosalt control in milling effluents and their oxidation are discussed. Selenium and tellerium removal during electrolytic copper refining, separation of lead from noble metals in refinery residues, the use of calcine for selective zinc precipitation, and behaviour of copper and mercury during cyanidation of gold and silver minerals are examined., The volume contains 31 papers under the following session headings: arsenic control and disposal, silica control, impurity removal in refining, and thiosalt control. The aqueous chemistry of arsenic in relation to hydrometallurgical processes, the use of calcium compounds to remove arsenic and the formation and environmental safety of iron-arsenic compounds are examined. Arsenic management, control and treatment at Key Lake, Barberton, Equity Silver, Con and the Port Hope uranium refinery are detailed. Silica control in the Bayer Process, ion exchange, carbon in pulp and solvent extraction circuits, and thiosalt control in milling effluents and their oxidation are discussed. Selenium and tellerium removal during electrolytic copper refining, separation of lead from noble metals in refinery residues, the use of calcine for selective zinc precipitation, and behaviour of copper and mercury during cyanidation of gold and silver minerals are examined.

A flowsheet for removing arsenic from waste water with calcium hydroxide was proposed. This was based on the experimental results: additions of excess calcium hydroxide to waste water reduced arsenic levels to less than 10 mg/l; calcium arsenate and arsenite formed very insoluble Ca3(AsO4)2 by calcining in air above 700 degrees C., A flowsheet for removing arsenic from waste water with calcium hydroxide was proposed. This was based on the experimental results: additions of excess calcium hydroxide to waste water reduced arsenic levels to less than 10 mg/l; calcium arsenate and arsenite formed very insoluble Ca3(AsO4)2 by calcining in air above 700 degrees C.

The effect of the type of reagent (CaO, CaCO3, Na2CO3, NaOH) on the process of precipitation of heavy metals from the effluents of acid leaching of uranium ores, and the action of different reagents (BaCl2, BaCO3, BaSO4) on the radium decontamination of these effluents was investigated. Milk-of-lime treatment was found to be an efficient and low-cost means of neutralising the free acidity of the solution and of eliminating the heavy metals. Addition up to a pH value of 8.5 permits a reduction of the radium content, however, additional treatment with BaCl2 is necessary to reduce the activity below the legal limit. Dilution of the alkaline solution can be used to reduce the concentration of chlorides and sulphates to figures below the standard specifications for discharge of liquid effluent in water., The effect of the type of reagent (CaO, CaCO3, Na2CO3, NaOH) on the process of precipitation of heavy metals from the effluents of acid leaching of uranium ores, and the action of different reagents (BaCl2, BaCO3, BaSO4) on the radium decontamination of these effluents was investigated. Milk-of-lime treatment was found to be an efficient and low-cost means of neutralising the free acidity of the solution and of eliminating the heavy metals. Addition up to a pH value of 8.5 permits a reduction of the radium content, however, additional treatment with BaCl2 is necessary to reduce the activity below the legal limit. Dilution of the alkaline solution can be used to reduce the concentration of chlorides and sulphates to figures below the standard specifications for discharge of liquid effluent in water.

Results from investigations of the hydrometallurgical treatment of Ge Jiu nepheline by the hydrothermal method using pressure leaching are discussed. Potassium, sodium and alumina obtained using a two stage pressure leaching process, involving sodium hydroxide solutions containing calcium hydroxide, and the calcium silicate residue from the second leaching stage, can be used as a raw material for cement manufacture., Results from investigations of the hydrometallurgical treatment of Ge Jiu nepheline by the hydrothermal method using pressure leaching are discussed. Potassium, sodium and alumina obtained using a two stage pressure leaching process, involving sodium hydroxide solutions containing calcium hydroxide, and the calcium silicate residue from the second leaching stage, can be used as a raw material for cement manufacture.

Tato bakalářská práce studuje možnosti přípravy syntetických pískovců na bázi alkalicky aktivovaných (geopolymerních) pojiv. Cílem práce je navrhnout vhodný pojivový systém o optimální koncentraci, tak aby připravený materiál (umělý kámen) vykazoval podobné vlastnosti jako přírodní. V experimentální části jsou shrnuty experimenty, které studují několik odlišných alkalických pojivových systémů. Cílem je porovnat vlastnosti pojiv připravených z metakaolinů (Mefisto K-05 a L-05) alkalicky aktivovaných sodným nebo draselným vodním sklem. Pro porovnání s těmito pojivovými systémy byly připraveny i vzorky z komerčně dodávaného geopolymerního pojiva Baucis., This thesis explores the possibility of developing synthetic sandstones based on alkaline-activated (geopolymer) binders. The goal is to design an appropriate connective system of optimal concentration, so that the prepared material (artificial stone) showed similar characteristics as natural. The experimental section summarizes the experiments that explore several different alkali connective systems. The aim is to compare the properties of binders prepared from methakaolin (Mefisto K-05 and L-05) alkali-activated by sodium or potassium water glass. For comparison with these connective systems were also prepared samples of commercially supplied geopolymer binder called Baucis

Tato bakalářská práce studuje možnosti přípravy syntetických pískovců na bázi alkalicky aktivovaných (geopolymerních) pojiv. Cílem práce je navrhnout vhodný pojivový systém o optimální koncentraci, tak aby připravený materiál (umělý kámen) vykazoval podobné vlastnosti jako přírodní. V experimentální části jsou shrnuty experimenty, které studují několik odlišných alkalických pojivových systémů. Cílem je porovnat vlastnosti pojiv připravených z metakaolinů (Mefisto K-05 a L-05) alkalicky aktivovaných sodným nebo draselným vodním sklem. Pro porovnání s těmito pojivovými systémy byly připraveny i vzorky z komerčně dodávaného geopolymerního pojiva Baucis., This thesis explores the possibility of developing synthetic sandstones based on alkaline-activated (geopolymer) binders. The goal is to design an appropriate connective system of optimal concentration, so that the prepared material (artificial stone) showed similar characteristics as natural. The experimental section summarizes the experiments that explore several different alkali connective systems. The aim is to compare the properties of binders prepared from methakaolin (Mefisto K-05 and L-05) alkali-activated by sodium or potassium water glass. For comparison with these connective systems were also prepared samples of commercially supplied geopolymer binder called Baucis

Práce je součástí grantového zadání a zabývá se vlivem vlastností vstupní suroviny a jejím výpalem na vlastnosti výsledných produktů, tedy vápna a vápenného hydrátu. Cílem práce je zjistit, jak moc je ovlivněno chování a vlastnosti vápna a vápenného hydrátu chemickým složením vápenců, jejich petrografií, genezí a diagenezí, mikrostrukturou a porozitou. Předmětem experimentální části potom je vyhodnocení analýz provedených na vypálených vzorcích vápna, jako je reaktivita a porozita, a na vzorcích vápenného hydrátu, což je zjištění měrného povrchu a sedimentačních objemů., The thesis is a part of grant assignment and focuses on the effect of input materials and their burning on the properties of resulting products, i.e. lime and slaked lime. The aim of the thesis is to find out how the behaviour and properties of lime and slaked lime are influenced by chemical composition of limestone, their petrography, genesis and diagenesis, microstructure and porosity. The subject of the experimental part of the thesis is the evaluation of analysis carried out on burned lime and slaked lime samples. Lime samples are examined in terms of their reactivity and porosity, whereas slaked lime samples in terms of their specific surface and sedimentation volume.

Tato bakalářská práce studuje možnosti přípravy syntetických pískovců na bázi alkalicky aktivovaných (geopolymerních) pojiv. Cílem práce je navrhnout vhodný pojivový systém o optimální koncentraci, tak aby připravený materiál (umělý kámen) vykazoval podobné vlastnosti jako přírodní. V experimentální části jsou shrnuty experimenty, které studují několik odlišných alkalických pojivových systémů. Cílem je porovnat vlastnosti pojiv připravených z metakaolinů (Mefisto K-05 a L-05) alkalicky aktivovaných sodným nebo draselným vodním sklem. Pro porovnání s těmito pojivovými systémy byly připraveny i vzorky z komerčně dodávaného geopolymerního pojiva Baucis., This thesis explores the possibility of developing synthetic sandstones based on alkaline-activated (geopolymer) binders. The goal is to design an appropriate connective system of optimal concentration, so that the prepared material (artificial stone) showed similar characteristics as natural. The experimental section summarizes the experiments that explore several different alkali connective systems. The aim is to compare the properties of binders prepared from methakaolin (Mefisto K-05 and L-05) alkali-activated by sodium or potassium water glass. For comparison with these connective systems were also prepared samples of commercially supplied geopolymer binder called Baucis

Anortit je krystalická fáze keramického střepu. Vzniká při výpalu vápenatých keramických surovinových směsí. Tato práce se zabývá vlivem anortitu na výsledné vlastnosti keramického střepu, zejména pevnost v ohybu, pórovitost, smrštění, součinitel délkové teplotní roztažnosti. V práci se dále bude hodnotit vliv obsahu oxidu vápenatého a jeho zdroje, na užitné vlastnosti keramického střepu. Jako zdroje CaO byl použit hydroxid vápenatý, uhličitan vápenatý a fluidní úletový popílek., Anorthite is crystalline phase in the ceramic body. Is acquired on burning a mixture of calcium ceramic raw material. This work deals with the influence on the resulting properties of anorthite ceramic body, especially flexural strength, porosity, shrinkage, thermal expansion coefficient. And the influence of different CaO sources on the properties. As a source of CaO was used calcium carbonate, calcium hydroxide and fluid fly ash.

Práce je součástí grantového zadání a zabývá se vlivem vlastností vstupní suroviny a jejím výpalem na vlastnosti výsledných produktů, tedy vápna a vápenného hydrátu. Cílem práce je zjistit, jak moc je ovlivněno chování a vlastnosti vápna a vápenného hydrátu chemickým složením vápenců, jejich petrografií, genezí a diagenezí, mikrostrukturou a porozitou. Předmětem experimentální části potom je vyhodnocení analýz provedených na vypálených vzorcích vápna, jako je reaktivita a porozita, a na vzorcích vápenného hydrátu, což je zjištění měrného povrchu a sedimentačních objemů., The thesis is a part of grant assignment and focuses on the effect of input materials and their burning on the properties of resulting products, i.e. lime and slaked lime. The aim of the thesis is to find out how the behaviour and properties of lime and slaked lime are influenced by chemical composition of limestone, their petrography, genesis and diagenesis, microstructure and porosity. The subject of the experimental part of the thesis is the evaluation of analysis carried out on burned lime and slaked lime samples. Lime samples are examined in terms of their reactivity and porosity, whereas slaked lime samples in terms of their specific surface and sedimentation volume.

Práce se zabývá možností využití fluidních popílků pro směsné cementy. Zaměřuje se na termodynamickou stabilitu ettringitu, který vzniká při hydrataci směsných cementů. Konkrétně je sledován vliv vnějšího prostředí a vliv prostředí kalciumhydrosilikátů na stabilitu ettringitu., The thesis deals with possibilities of FBC fly ash utilization for composite cements. It focuses on thermodynamic stability of ettringite, which is produced during composite cements hydration. Specific tasks are dedicated to observation of influence of outdoor environment and influence of calciumhydrosilicate environment to stability of ettringite.

Tato práce se zabývá neutralizací kyselých podzemních vod, vzniklých po hydrochemické těžbě uranu v oblasti Stráže pod Ralskem. Je zde stručně popsán vývoj hydrochemické těžby uranu, jeho negativní vlivy na životní prostředí a popis technologie, zabývající se jejich likvidací. Na to navazuje návrhový výpočet hlavních aparátů technologie vápenného hospodářství, který úzce souvisí s neutralizací kyselých roztoků. Výkon souboru vápenného hospodářství je určen pomocí látkové bilance. Výsledky jsou hlavní rozměry aparátů, strojních částí a příkony elektromotorů jednotlivých zařízení., The present thesis is concerned with neutralization of acid groundwater after the hydrochemical uranium mining in the area of Stráž pod Ralskem. In the thesis is briefly described progression of the hydrochemical uranium mining and follow-up negative impacts on the environment. There is described the technology involved in its disposal. This is followed by the design calculation of major apparatus technology associated with neutralization of acid solutions. Output of technology is determined by the mass balance. The results are the main dimensions of the apparatus, mechanical parts and electric power each device.

Voor de beheersing van vruchtboomkanker is een alternatieve strategie ontwikkeld met celkalk (= calciumhydroxide). Onderzocht is of celkalk de bladvertering ongemoeid laat. De toepassing van celkalk tegen vruchtboomkanker is gecombineerd met het stimuleren van de bladvertering met twee reeds bekende methoden, namelijk het blad bespuiten met ureum en het blad versnipperen

Anortit je krystalická fáze keramického střepu. Vzniká při výpalu vápenatých keramických surovinových směsí. Tato práce se zabývá vlivem anortitu na výsledné vlastnosti keramického střepu, zejména pevnost v ohybu, pórovitost, smrštění, součinitel délkové teplotní roztažnosti. V práci se dále bude hodnotit vliv obsahu oxidu vápenatého a jeho zdroje, na užitné vlastnosti keramického střepu. Jako zdroje CaO byl použit hydroxid vápenatý, uhličitan vápenatý a fluidní úletový popílek., Anorthite is crystalline phase in the ceramic body. Is acquired on burning a mixture of calcium ceramic raw material. This work deals with the influence on the resulting properties of anorthite ceramic body, especially flexural strength, porosity, shrinkage, thermal expansion coefficient. And the influence of different CaO sources on the properties. As a source of CaO was used calcium carbonate, calcium hydroxide and fluid fly ash.

Tato práce se zabývá neutralizací kyselých podzemních vod, vzniklých po hydrochemické těžbě uranu v oblasti Stráže pod Ralskem. Je zde stručně popsán vývoj hydrochemické těžby uranu, jeho negativní vlivy na životní prostředí a popis technologie, zabývající se jejich likvidací. Na to navazuje návrhový výpočet hlavních aparátů technologie vápenného hospodářství, který úzce souvisí s neutralizací kyselých roztoků. Výkon souboru vápenného hospodářství je určen pomocí látkové bilance. Výsledky jsou hlavní rozměry aparátů, strojních částí a příkony elektromotorů jednotlivých zařízení., The present thesis is concerned with neutralization of acid groundwater after the hydrochemical uranium mining in the area of Stráž pod Ralskem. In the thesis is briefly described progression of the hydrochemical uranium mining and follow-up negative impacts on the environment. There is described the technology involved in its disposal. This is followed by the design calculation of major apparatus technology associated with neutralization of acid solutions. Output of technology is determined by the mass balance. The results are the main dimensions of the apparatus, mechanical parts and electric power each device.

Práce se zabývá možností využití fluidních popílků pro směsné cementy. Zaměřuje se na termodynamickou stabilitu ettringitu, který vzniká při hydrataci směsných cementů. Konkrétně je sledován vliv vnějšího prostředí a vliv prostředí kalciumhydrosilikátů na stabilitu ettringitu., The thesis deals with possibilities of FBC fly ash utilization for composite cements. It focuses on thermodynamic stability of ettringite, which is produced during composite cements hydration. Specific tasks are dedicated to observation of influence of outdoor environment and influence of calciumhydrosilicate environment to stability of ettringite.

Práce je součástí grantového zadání a zabývá se vlivem vlastností vstupní suroviny a jejím výpalem na vlastnosti výsledných produktů, tedy vápna a vápenného hydrátu. Cílem práce je zjistit, jak moc je ovlivněno chování a vlastnosti vápna a vápenného hydrátu chemickým složením vápenců, jejich petrografií, genezí a diagenezí, mikrostrukturou a porozitou. Předmětem experimentální části potom je vyhodnocení analýz provedených na vypálených vzorcích vápna, jako je reaktivita a porozita, a na vzorcích vápenného hydrátu, což je zjištění měrného povrchu a sedimentačních objemů., The thesis is a part of grant assignment and focuses on the effect of input materials and their burning on the properties of resulting products, i.e. lime and slaked lime. The aim of the thesis is to find out how the behaviour and properties of lime and slaked lime are influenced by chemical composition of limestone, their petrography, genesis and diagenesis, microstructure and porosity. The subject of the experimental part of the thesis is the evaluation of analysis carried out on burned lime and slaked lime samples. Lime samples are examined in terms of their reactivity and porosity, whereas slaked lime samples in terms of their specific surface and sedimentation volume.

Tato bakalářská práce studuje možnosti přípravy syntetických pískovců na bázi alkalicky aktivovaných (geopolymerních) pojiv. Cílem práce je navrhnout vhodný pojivový systém o optimální koncentraci, tak aby připravený materiál (umělý kámen) vykazoval podobné vlastnosti jako přírodní. V experimentální části jsou shrnuty experimenty, které studují několik odlišných alkalických pojivových systémů. Cílem je porovnat vlastnosti pojiv připravených z metakaolinů (Mefisto K-05 a L-05) alkalicky aktivovaných sodným nebo draselným vodním sklem. Pro porovnání s těmito pojivovými systémy byly připraveny i vzorky z komerčně dodávaného geopolymerního pojiva Baucis., This thesis explores the possibility of developing synthetic sandstones based on alkaline-activated (geopolymer) binders. The goal is to design an appropriate connective system of optimal concentration, so that the prepared material (artificial stone) showed similar characteristics as natural. The experimental section summarizes the experiments that explore several different alkali connective systems. The aim is to compare the properties of binders prepared from methakaolin (Mefisto K-05 and L-05) alkali-activated by sodium or potassium water glass. For comparison with these connective systems were also prepared samples of commercially supplied geopolymer binder called Baucis