WO2021137787A2 - A binding construction material composition and production method thereof - Google Patents

A binding construction material composition and production method thereof Download PDF

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Publication number
WO2021137787A2
WO2021137787A2 PCT/TR2020/050896 TR2020050896W WO2021137787A2 WO 2021137787 A2 WO2021137787 A2 WO 2021137787A2 TR 2020050896 W TR2020050896 W TR 2020050896W WO 2021137787 A2 WO2021137787 A2 WO 2021137787A2
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Prior art keywords
weight
sewage sludge
cao
high temperature
ash
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PCT/TR2020/050896
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French (fr)
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WO2021137787A3 (en
Inventor
Ali Firat CABALAR
Abdulcabbar YAVUZ
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Gaziantep Universitesi Rektorlugu
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Publication of WO2021137787A2 publication Critical patent/WO2021137787A2/en
Publication of WO2021137787A3 publication Critical patent/WO2021137787A3/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/06—Calcium compounds, e.g. lime
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/10—Burned or pyrolised refuse
    • C04B18/103—Burned or pyrolised sludges
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/10—Burned or pyrolised refuse
    • C04B18/105—Gaseous combustion products or dusts collected from waste incineration, e.g. sludge resulting from the purification of gaseous combustion products of waste incineration
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0035—Processes characterised by the absence of a mechanical mixing step, e.g. "no-mix" processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention relates to a binding construction material composition that binds various aggregates to each other and creates a solid mass, and production method thereof. Said construction material is used to reinforce soil.
  • cement is used as a binding construction material.
  • Cement is a hydraulic binding construction material produced by grinding semi-finished material clinker, which is obtained by firing raw materials containing mainly silicon, calcium, aluminum and iron oxides up to sintering degrees, by adding one or more additives.
  • Cement production has many negative impacts on the environment and health, and cement factories are considered as highly polluting facilities.
  • CaC0 3 limestone
  • clay soil mostly aluminum oxide + silicon oxide + iron oxide.
  • Heating calcium carbonate (CaC0 3 ) to high temperatures yields calcium oxide (CaO), and there is around 65% CaO as the main component in the cement.
  • Burning 100 grams of CaC0 3 in cement factories results in 56 grams of CaO and 44 grams of CO2 ⁇
  • CO2 is a harmful gas directly affecting people and the environment, and cement production and thus CO2 emission are gradually increasing due to the rapidly increasing urbanization. Therefore, there is a need for environmentally friendly binding construction materials.
  • waste materials include sewage sludge ash.
  • the high amount of CaO, which is known as the main component of cement, in the sewage sludge ash that is obtained by burning sewage indicates that it is a good alternative to use sewage sludge ash instead of CaO component in cement, but the CaO compound in the sewage sludge ash is not actively exploited.
  • Non-patent document "The use of sewage sludge ash (SSA) as partial replacement of cement in concrete” (Ing, Chin, Guan & Suil, 2015) is an example of the known state of the art. Said document relates to a study on using sewage sludge ash as replacement of cement in the process of making concrete. In the study, four different percentages of sewage sludge ash are added to partially replace cement during the process of making concrete, and slump, water absorption and compressive strength tests are conducted on the concrete. According to the result of this study, it was concluded that concrete structure/mixture containing 5% sewage sludge ash had optimum properties and sewage sludge ash could be used instead of cement. However, said document does not mention a material composition containing sewage sludge ash that can be used as a complete replacement of cement. This shows that the dependence on cement is still present.
  • the invention relates to a production method for a binding construction material that is obtained by mixing solid wastes sewage sludge ash and limestone rock powder with soil in predetermined proportions and that binds various aggregates to each other and creates a solid mass after a certain amount of time, and to the binding construction material composition obtained by this method.
  • An object of the invention is to reduce environmental and health issues caused by the usage of cement and thus cement production.
  • a construction material that can be used as replacement of cement and reaches cement content is developed.
  • Another object of the invention is to provide environmental and economic benefit by recycling sewage sludge ash and limestone rock powder wastes for a useful purpose.
  • Another object of the invention is to reduce the amount of SO 3 present in sewage sludge ash and stabilize other metal oxides (S1O2, Fe2C>3 and AI2O3, etc.).
  • the invention is a production method for a binding construction material and it comprises the following process steps in general: a. adding limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil into ash material that is obtained by exposing sewage sludge or an organic/domestic waste material to a high temperature for a predetermined period of time or b. exposing sewage sludge or an organic/domestic waste material and limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil to a high temperature for a predetermined period of time with or without mixing them.
  • ash that is obtained by burning materials such as organic/domestic waste is used as replacement of sewage sludge ash.
  • powder of minerals such as marble, seashell and/or carbonatite containing a high amount of CaCCb and/or CaO therein is used as replacement of limestone rock powder.
  • material such as sewage sludge ash or organic/domestic waste ash is present in the mixture at 30%.
  • sewage sludge ash contains at least 10% CaO by weight.
  • the construction material contains ash material that is obtained from material such as sewage sludge ash or organic/domestic waste, containing 40% CaO.
  • At least 30% and at most 60% by weight of limestone rock powder is used.
  • At least 10% and at most 40% by weight of clay soil is used. In one embodiment of the invention, 25% by weight of clay soil is used.
  • Temperature and duration of the heating process vary according to the mixture content and the compound ratio of the content.
  • the high temperature is 1000°C.
  • the duration of the high temperature process is at least 60 minutes and at most 300 minutes.
  • the high temperature is in the range of 1400-2000 °C. In one embodiment of the invention, the high temperature is 1700 °C.
  • Limestone is mixed with clay at a temperature higher than 1400 °C to obtain clinker which is the main component of cement for concrete production .
  • the construction material contains clay soil containing 20% CaO.
  • the construction material contains limestone rock powder containing 95% CaCCb.
  • At least one of marble powder, seashell powder and carbonatite powder is used as replacement of limestone rock powder.
  • any of these three mineral powders can be used as well as combinations of two or three.
  • the mixture is refined by using a grinder.
  • the grinding process is carried out during or after the heating process. In other words, materials used during or after the high temperature process are refined to a predetermined particle size.
  • the particle size of the mixture is ground to at least 1 micron and at most 100 microns.
  • 30% by weight of sewage sludge ash, 45% by weight of limestone rock powder and 25% by weight of clay soil are used.
  • the mixture in order to obtain a binder from sewage sludge ash containing 40% CaO, limestone rock powder containing 95% CaCCb and a clay soil containing 20% CaO, the mixture is reacted at high temperature for a suitable period of time such that there is 30% by weight of sewage sludge ash, 45% by weight of limestone rock powder and 25% by weight of clay soil.
  • a coloring material is added to the mixture.
  • the obtained mixture is refined with grinders after the heating process or directly used without refining.
  • the materials used are mechanically mixed before, during or after the high temperature process in determined amounts in order to reach the ratios of chemicals in the cement depending on their chemical content ratios.
  • the invention is a production method for a binding composition material wherein it comprises the following process steps: adding limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil into ash material that is obtained by burning/exposing sewage sludge or an organic/domestic waste material to a high temperature for a predetermined period of time or burning/exposing sewage sludge or an organic/domestic waste material and limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil to a high temperature for a predetermined period of time with or without mixing them.
  • a construction material obtained by the method of the invention is also within the scope of the invention.
  • the construction material in one embodiment, contains ash obtained from sewage sludge or organic/domestic waste containing 40% by weight of CaO, clay soil containing 20% by weight of CaO and limestone rock powder containing 95% by weight of CaC0 3 .
  • This mixture is mixed with water to form a dry binder.
  • the material (mixture) obtained as a result of the processes has a binding property that solidifies like cement when mixed with water in certain ratios.
  • the amount of CaO known as the main component of cement is typically 40%. However, the amount of CaO in cement is nearly 60%, and it is therefore required to add further CaO to increase the amount of CaO present in the sewage sludge ash.
  • CaO is obtained from limestone containing a high percentage (typically around 95%) of CaC0 3 .
  • limestone is added to the burning unit and thus the desired amount of CaO is provided in the binder content. This also ensures that the ratio of sulfur trioxide (SO3), which is an unwanted compound in binding materials, in sewage sludge ash decreases and the ratios of other compounds reach the ratios in cement.
  • SO3 sulfur trioxide
  • CaO and clay soil before, during or after the heating process and reacting the obtained mixture at high temperature for a suitable amount of time yield a binding construction material as replacement of cement.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention relates to an environmentally friendly binding construction material composition developed for reducing cement production/use and obtained by bringing solid wastes together, and to production method thereof. In this method, the ash material produced by burning materials such as sewage sludge ash or organic/domestic waste is mixed with limestone rock powder or at least one mineral containing a high amount of CaCO3 and/or CaO and soil, and is reacted at high temperature for a suitable period of time.

Description

A BINDING CONSTRUCTION MATERIAL COMPOSITION AND PRODUCTION
METHOD THEREOF
Field of the Invention
The invention relates to a binding construction material composition that binds various aggregates to each other and creates a solid mass, and production method thereof. Said construction material is used to reinforce soil.
Known State of the Art
Today, in general, cement is used as a binding construction material. Cement is a hydraulic binding construction material produced by grinding semi-finished material clinker, which is obtained by firing raw materials containing mainly silicon, calcium, aluminum and iron oxides up to sintering degrees, by adding one or more additives.
Cement production has many negative impacts on the environment and health, and cement factories are considered as highly polluting facilities. To produce cement in factories, CaC03 (limestone) is fired at high temperature (at >1400°C) with clay soil (mostly aluminum oxide + silicon oxide + iron oxide). Heating calcium carbonate (CaC03) to high temperatures yields calcium oxide (CaO), and there is around 65% CaO as the main component in the cement. Burning 100 grams of CaC03 in cement factories results in 56 grams of CaO and 44 grams of CO2· As is known, CO2 is a harmful gas directly affecting people and the environment, and cement production and thus CO2 emission are gradually increasing due to the rapidly increasing urbanization. Therefore, there is a need for environmentally friendly binding construction materials. There are studies in the art on reducing health and environment problems caused by cement production using waste materials. Examples of said waste materials include sewage sludge ash.
Developing technology, consumption habits and urbanization have caused a substantial increase in the number of domestic/urban wastewater plants and the amount of sewage sludge produced in these plants. Treatment or disposal of sewage sludge does not attract as much attention as wastewater treatment, and untreated sewage sludge has become an important issue for the environment. Therefore, handling of sludge in treatment plants is becoming increasingly important and it has become a necessity to use sludge efficiently and advantageously in sustainable environmental management. For this purpose, sewage sludge is used for energy generation and high temperatures are reached during energy recovery. However, the resulting CaO based sludge is not used actively and directly left to empty areas.
The high amount of CaO, which is known as the main component of cement, in the sewage sludge ash that is obtained by burning sewage indicates that it is a good alternative to use sewage sludge ash instead of CaO component in cement, but the CaO compound in the sewage sludge ash is not actively exploited.
Non-patent document "The use of sewage sludge ash (SSA) as partial replacement of cement in concrete" (Ing, Chin, Guan & Suil, 2015) is an example of the known state of the art. Said document relates to a study on using sewage sludge ash as replacement of cement in the process of making concrete. In the study, four different percentages of sewage sludge ash are added to partially replace cement during the process of making concrete, and slump, water absorption and compressive strength tests are conducted on the concrete. According to the result of this study, it was concluded that concrete structure/mixture containing 5% sewage sludge ash had optimum properties and sewage sludge ash could be used instead of cement. However, said document does not mention a material composition containing sewage sludge ash that can be used as a complete replacement of cement. This shows that the dependence on cement is still present.
The document "Use of Sewage Sludge Ash (SSA)-Cement Admixtures in Mortars" (Monzo, Paya, M.V. Borrachero and Corcoles, 1996) is another example of the known state of the art. This document relates to the effect of sewage sludge ash on mortars. In this document, sewage sludge ash samples having different particle sizes is used as replacement of 15% of Portland Cement, and compressive and flexural strength of mortar are investigated. In line with the obtained results, it was determined that sewage sludge ash enhanced the strength. This is considered to be due to the pozzolanic activity of sewage sludge ash. The study of the document does not mention a material containing sewage sludge ash that can be used as a complete replacement of cement and this shows that the dependence on cement will be present.
Hence, there is still a need for a binding construction material composition that can be used as replacement of cement, thereby reducing the environmental and health issues caused by cement and that is environmentally friendly, and production method thereof.
Detailed Description of the Invention
The invention relates to a production method for a binding construction material that is obtained by mixing solid wastes sewage sludge ash and limestone rock powder with soil in predetermined proportions and that binds various aggregates to each other and creates a solid mass after a certain amount of time, and to the binding construction material composition obtained by this method.
In the production of this construction material, CaO compound in the sewage sludge ash is actively exploited and a binder that can be used as replacement of cement is obtained. Said binding material is used to reinforce grounds.
An object of the invention is to reduce environmental and health issues caused by the usage of cement and thus cement production. In line with this object, a construction material that can be used as replacement of cement and reaches cement content is developed.
Another object of the invention is to provide environmental and economic benefit by recycling sewage sludge ash and limestone rock powder wastes for a useful purpose.
Another object of the invention is to reduce the amount of SO3 present in sewage sludge ash and stabilize other metal oxides (S1O2, Fe2C>3 and AI2O3, etc.).
The invention is a production method for a binding construction material and it comprises the following process steps in general: a. adding limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil into ash material that is obtained by exposing sewage sludge or an organic/domestic waste material to a high temperature for a predetermined period of time or b. exposing sewage sludge or an organic/domestic waste material and limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil to a high temperature for a predetermined period of time with or without mixing them.
In the production of the construction material of the application, ash that is obtained by burning materials such as organic/domestic waste is used as replacement of sewage sludge ash. Moreover, powder of minerals such as marble, seashell and/or carbonatite containing a high amount of CaCCb and/or CaO therein is used as replacement of limestone rock powder.
In one embodiment of the invention, material such as sewage sludge ash or organic/domestic waste ash is present in the mixture at 30%.
In one embodiment of the invention, sewage sludge ash contains at least 10% CaO by weight.
In one embodiment of the invention, the construction material contains ash material that is obtained from material such as sewage sludge ash or organic/domestic waste, containing 40% CaO.
In one embodiment of the invention, at least 30% and at most 60% by weight of limestone rock powder is used.
In one embodiment of the invention, 45% by weight of limestone rock powder is used.
In one embodiment of the invention, at least 10% and at most 40% by weight of clay soil is used. In one embodiment of the invention, 25% by weight of clay soil is used.
Temperature and duration of the heating process vary according to the mixture content and the compound ratio of the content.
In one embodiment of the invention, the high temperature is 1000°C. In this embodiment, the duration of the high temperature process is at least 60 minutes and at most 300 minutes.
In one embodiment of the invention, the high temperature is in the range of 1400-2000 °C. In one embodiment of the invention, the high temperature is 1700 °C. Limestone is mixed with clay at a temperature higher than 1400 °C to obtain clinker which is the main component of cement for concrete production .
In one embodiment of the invention, the construction material contains clay soil containing 20% CaO.
In one embodiment of the invention, the construction material contains limestone rock powder containing 95% CaCCb.
In one embodiment of the invention, at least one of marble powder, seashell powder and carbonatite powder is used as replacement of limestone rock powder. In other words, any of these three mineral powders can be used as well as combinations of two or three.
In one embodiment of the invention, the mixture is refined by using a grinder. In one embodiment of the invention, the grinding process is carried out during or after the heating process. In other words, materials used during or after the high temperature process are refined to a predetermined particle size.
In one embodiment of the invention, the particle size of the mixture is ground to at least 1 micron and at most 100 microns.
In one embodiment of the invention, 30% by weight of sewage sludge ash, 45% by weight of limestone rock powder and 25% by weight of clay soil are used. In this embodiment of the invention, in order to obtain a binder from sewage sludge ash containing 40% CaO, limestone rock powder containing 95% CaCCb and a clay soil containing 20% CaO, the mixture is reacted at high temperature for a suitable period of time such that there is 30% by weight of sewage sludge ash, 45% by weight of limestone rock powder and 25% by weight of clay soil.
In one embodiment of the invention, a coloring material is added to the mixture.
In one embodiment of the invention, the obtained mixture is refined with grinders after the heating process or directly used without refining.
In one embodiment of the invention, the materials used are mechanically mixed before, during or after the high temperature process in determined amounts in order to reach the ratios of chemicals in the cement depending on their chemical content ratios.
Briefly, the invention is a production method for a binding composition material wherein it comprises the following process steps: adding limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil into ash material that is obtained by burning/exposing sewage sludge or an organic/domestic waste material to a high temperature for a predetermined period of time or burning/exposing sewage sludge or an organic/domestic waste material and limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil to a high temperature for a predetermined period of time with or without mixing them.
A construction material obtained by the method of the invention is also within the scope of the invention. The construction material, in one embodiment, contains ash obtained from sewage sludge or organic/domestic waste containing 40% by weight of CaO, clay soil containing 20% by weight of CaO and limestone rock powder containing 95% by weight of CaC03. This mixture is mixed with water to form a dry binder. In other words, the material (mixture) obtained as a result of the processes has a binding property that solidifies like cement when mixed with water in certain ratios.
In the sewage sludge ash, the amount of CaO known as the main component of cement is typically 40%. However, the amount of CaO in cement is nearly 60%, and it is therefore required to add further CaO to increase the amount of CaO present in the sewage sludge ash. In order to achieve this, CaO is obtained from limestone containing a high percentage (typically around 95%) of CaC03. In order to obtain CaO, during obtaining sewage sludge ash, limestone is added to the burning unit and thus the desired amount of CaO is provided in the binder content. This also ensures that the ratio of sulfur trioxide (SO3), which is an unwanted compound in binding materials, in sewage sludge ash decreases and the ratios of other compounds reach the ratios in cement. By means of the invention, mechanically mixing the ash produced by burning of materials such as solid wastes sewage sludge ash or organic/domestic waste, with limestone rock powder or minerals containing a high amount of CaCCb and/or
CaO and clay soil before, during or after the heating process and reacting the obtained mixture at high temperature for a suitable amount of time yield a binding construction material as replacement of cement.

Claims

1.A production method for a binding construction material characterized by comprising the steps of; a. adding limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil into ash material that is obtained by exposing sewage sludge or an organic/domestic waste material to a high temperature for a predetermined period of time or b. exposing sewage sludge or an organic/domestic waste material and limestone rock powder or at least one mineral containing a high amount of CaCCb and/or CaO therein and soil to a high temperature for a predetermined period of time with or without mixing them.
2. The method according to claim 1, wherein 30% by weight of a material such as sewage sludge ash or organic/domestic waste ash is used.
3. The method according to claim 1, wherein the sewage sludge ash comprises at least 10% by weight of CaO.
4. The method according to claim 1, wherein at least 10% and at most 40% by weight of clay soil is used.
5. The method according to claim 4, wherein 25% by weight of soil is used.
6. The method according to claim 1, wherein at least 30% and at most 60% by weight of limestone rock powder is used.
7. The method according to claim 6, wherein 45% by weight of limestone rock powder is used.
8. The method according to claim 1, wherein the high temperature is 1000°C.
9. The method according to claim 8, wherein the duration of the high temperature process is at least 60 minutes and at most 300 minutes.
10. The method according to claim 1, wherein the high temperature is in the range of 1400-2000 °C.
11. The method according to claim 10, wherein the high temperature is 1700 °C.
12. The method according to claim 1, wherein 30% by weight of sewage sludge ash, 45% by weight of limestone rock powder and 25% by weight of clay soil are used.
13. The method according to claim 1, wherein at least one of marble powder, seashell powder and carbonatite powder is used as replacement of limestone rock powder.
14. The method according to claim 1, wherein the materials used are refined to a predetermined particle size, during or after the high temperature process.
15. The method according to claim 14, wherein the particle size of the mixture is ground to at least 1 micron and at most 100 microns.
16. The method according to claim 1, wherein a coloring material is added to the mixture.
17. The method according to claim 1, wherein the mixture is mixed by means of mechanical mixers before, during or after the high temperature process.
18. A construction material obtained by the method according to any one of the preceding claims.
19. The construction material according to claim 18, wherein it comprises ash material obtained from sewage sludge or organic/domestic waste containing 40% by weight of CaO, clay soil containing 20% by weight of CaO and limestone rock powder containing 95% by weight of CaC03.
PCT/TR2020/050896 2019-12-30 2020-09-30 A binding construction material composition and production method thereof WO2021137787A2 (en)

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CN115304295A (en) * 2022-07-15 2022-11-08 桂林理工大学 High-doped waste marble powder-slag-based alkali-activated cementing material and preparation method thereof

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JP2002249348A (en) * 2001-02-16 2002-09-06 Natoo Kenkyusho:Kk Ordinary temperature hydraulic solidifying agent and water-and-heat-resistant porous solidified body
KR100764004B1 (en) * 2005-08-26 2007-10-08 한국원자력연구원 Composition of seed spray soil comprising sewage sludge and starfish powder, and preparation method thereof
JP5991998B2 (en) * 2012-01-31 2016-09-14 太平洋セメント株式会社 Method for producing cement composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115304295A (en) * 2022-07-15 2022-11-08 桂林理工大学 High-doped waste marble powder-slag-based alkali-activated cementing material and preparation method thereof
CN115304295B (en) * 2022-07-15 2023-08-15 桂林理工大学 High-doping waste marble powder-slag-based alkali-activated cementing material and preparation method thereof

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