LU101393B1 - Method for preparing an earth yellow brick from loess. - Google Patents

Method for preparing an earth yellow brick from loess. Download PDF

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Publication number
LU101393B1
LU101393B1 LU101393A LU101393A LU101393B1 LU 101393 B1 LU101393 B1 LU 101393B1 LU 101393 A LU101393 A LU 101393A LU 101393 A LU101393 A LU 101393A LU 101393 B1 LU101393 B1 LU 101393B1
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loess
preparing
brick
fine sand
silty
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LU101393A
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French (fr)
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LU101393A1 (en
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Yong Fu
Feng Tai
Tiecheng Wang
Zhichao Zhu
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Henan Best Builder Network Tech Co Ltd
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    • 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
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
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    • 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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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    • 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
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
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    • 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
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    • 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
    • C04B28/08—Slag cements
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    • C04B33/00—Clay-wares
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    • C04B33/00—Clay-wares
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • E—FIXED CONSTRUCTIONS
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    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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Abstract

The invention discloses a method for preparing an earth yellow brick from loess, belonging to the technical field of restoration of ancient buildings. The invention comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator, stirring them uniformly with water, and feeding the resulting mixture into a brickmaking machine for brickmaking, wherein, the material ratio is 50-55% of loess, 20-25% of silty-fine sand, 10-15% of ground slag, 5-10% of glass powder and 3-5% of activator. The preparation method of the invention is simple, easy, energy-saving and environmentally friendly, and low in production cost.

Description

vt 1 Method for Preparing an Earth Yellow Brick From Loess LU101393 Technical Field The invention relates to the technical field of restoration of ancient buildings, in particular to a method for preparing an earth yellow brick from loess.
Background It is well known that the Qin Dynasty bricks and Han Dynasty tiles are cyan gray, which is the main color of ancient buildings. Most of the bricks fired in small brick kilns after the Qin Dynasty were bluish gray, and called ancient bricks. However, in the pre-Qin period, the Chinese nation mainly lived in the Yellow River Valley and used adobe made of loess for construction.
Such yellowish adobe is called earth yellow brick.
With the spreading of traditional Chinese culture in our country, a large number of earth yellow bricks are needed by some places to build ancient towns similar to those in the pre-Qin period.
Loess is a hydrophilic material. Adobe made of loess will disintegrate when being exposed to water, resulting in damage to buildings. In order to solve this problem, it is necessary to modify the loess from hydrophilic material to hydrophobic material under the condition of not changing the natural color of loess, so that the earth yellow bricks can be durable and meet the requirements of building materials for the construction of ancient towns similar to those in the pre-Qin period.
Summary of the Invention For the defects of the prior art, the invention provides a method for preparing an earth yellow brick from loess. This method is simple, feasible, energy-saving and environmentally friendly, and low in production cost.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: A method for preparing an earth yellow brick from loess comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator, stirring them uniformly with water, and feeding the resulting mixture into a brickmaking machine for brickmaking, wherein, the material ratio is 50-55% of loess, 20-25% of silty-fine sand, 10-15% of ground slag, 5-10% of glass powder and 3-5% of activator.
Preferably, the water content of the material uniformly stirred with water is 8%—12%. LU101393 Preferably, the loess is plain soil with less than 1% of organic matter content that widely exists in Northwest, North, Central and East China.
Preferably, the silty-fine sand is light-yellow fine sand formed by fluvial outwash.
Preferably, the silty-fine sand is river sediment in the lower reaches of Yellow River.
Preferably, the ground slag is water-quenched slag sold by the iron mill that is dried and ground into the fineness of more than 300 meshes.
Preferably, the glass powder is industrial scrap from glass manufacturers or glass machining enterprises, and can be ground into the fineness of more than 150 meshes. Glass powder is an alkaline coagulant aid and also an active silica material, which can generate hydrated calcium silicate gel in the presence of the activator.
Preferably, the activator is composed of salt gypsum and white cement in a weight ratio of
0.5-1.5:1. The activator is a white powder material, and can react with loess, silty-fine sand, glass powder and ground slag under water environment and high pressure conditions to obtain a block material with higher strength, thus meeting the strength requirement of earth yellow bricks.
Preferably, the fineness of the salt gypsum is 200 meshes and that of the white cement is 200 meshes. Salt gypsum is a white by-product produced by salt-making enterprises and should be dried and ground into the fineness of more than 200 meshes. White cement clinker should be ground into the fineness of more than 200 meshes. Salt gypsum and white cement clinker cannot only provide good triplet excitation effect generated by chlorine salt excitation, sulfate excitation and alkali excitation, but also will not change the natural color of loess after being consolidated with loess, making the color of earth yellow bricks more vivid. The beneficial effects of the invention are as follows:
1. Since loess and sediments from the Yellow River are taken as main raw materials in the invention, the raw material resources are rich, and the cost of the raw material resources is greatly reduced; water-quenched slags are solid wastes from iron mills and are used as the raw materials, so that such a new resource-based and efficient recycling method can transform wastes into assets.
2. The earth yellow brick prepared by the method of the invention has good compressive strength and frost resistance in accordance with the requirements of GB/T8239-2014 Normal
Concrete Small Block, and the brick is loess color, so it looks more vivid. LU101393
3. The earth yellow brick of the invention can be pressed and moulded, and can avoid the problems of complicated production process, high energy consumption and easy production of a large amount of greenhouse gases such as carbon dioxide in the sintering process.
4. The preparation method of the invention is simple, feasible, energy-saving and environmentally friendly, and low in production cost. Detailed Description of the Preferred Embodiment The technical scheme in the invention will be described clearly and completely as follows in combination with following embodiments. Apparently, the examples described are only some embodiments of the invention, but not all embodiments. Based on the examples of the invention, all other examples obtained by those of ordinary skill in the art without creative work fall within the protection scope of the invention. In the following examples, the loess is plain soil with less than 1% of organic matter that widely exists in Northwest, North, Central and East China; the silty-fine sand is river sediment in the lower Yellow River; the ground slag is water-quenched slag sold by the iron mill that is dried and ground into the fineness of more than 300 meshes. The glass powder is industrial scrap from glass manufacturers or glass machining enterprises, and can be ground into the fineness of more than 150 meshes. Example 1 The example provides a method for preparing an earth yellow brick from loess comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator (the material ratio: 52% of loess, 22% of silty-fine sand, 12% of ground slag, 10% of glass powder and 4% of activator), adding water to make the water content of the material to be 10%, stirring them uniformly and feeding the resulting mixture into a brick making machine for brickmaking. The activator is composed of salt gypsum and white cement in a weight ratio of 1.0:1. Example 2 The example provides a method for preparing an earth yellow brick from loess comprises : the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator (the material ratio: 50% of loess, 25% of silty-fine sand, 12% of ground slag, 10% ofglass powder and 3% of activator), adding water to make the water content of the material to be LU101393 8%, stirring them uniformly and feeding the resulting mixture into a brick making machine for brickmaking.
The activator is composed of salt gypsum and white cement in a weight ratio of 0.5:1. Example 3 The example provides a method for preparing an earth yellow brick from loess comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator (the material ratio: 55% of loess, 20% of silty-fine sand, 15% of ground slag, 5% of glass powder and 5% of activator), adding water to make the water content of the material to be 12%, stirring them uniformly and feeding the resulting mixture into a brick making machine for brickmaking.
The activator is composed of salt gypsum and white cement in a weight ratio of 1.5:1. Example 4 The example provides a method for preparing an earth yellow brick from loess comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator (the material ratio: 54% of loess, 23% of silty-fine sand, 10% of ground slag, 8% of glass powder and 5% of activator), adding water to make the water content of the material to be 10%, stirring them uniformly and feeding the resulting mixture into a brick making machine for brickmaking.
The activator is composed of salt gypsum and white cement in a weight ratio of 1.2:1. Example 5 The example provides a method for preparing an earth yellow brick from loess comprises the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator (the material ratio: 52% of loess, 24% of silty-fine sand, 11% of ground slag, 9% of glass powder and 4% of activator), adding water to make the water content of the material to be 10%, stirring them uniformly and feeding the resulting mixture into a brickmaking machine for brickmaking.
The activator is composed of salt gypsum and white cement in a weight ratio of 0.8:1. | The earth yellow bricks made in examples 1 to 5 were tested in accordance with GB/T8239-2014 Normal Concrete Small Block, and the specifications of the bricks obtained inora the test were 480 mmx 240 mmx 100 mm. The test results are shown in Table 1 below. LU101393 mere oe foe fe ee Test item Example 1 | Example 2 | Example 3 Example 4 Example 5 requirement Average value: =
25.0 27.2 26.5 25.4 26.7 26.8 Compressive Minimum value of strength (MPa) single block: =20.0 25.8 24.9 22.7 23.6 24.2 “ewe [Lr Te ( 5 Strength Maximum value of loss rate (%) | single block: <30 10 Frost | Mass loss Maximum value of resistance | rate (%) single block: <10 5.0 52 5.3 5.2 5.1 The above table shows that the earth yellow brick prepared by the preparation method of the invention has good compressive strength and frost resistance and meets the requirements of GB/T8239-2014. 5 What is said above is only better embodiment of the invention and not used to limit the invention. Any modification, equivalent replacement and improvement made within the range of the spirit and rule of the invention can be incorporated in the protection range of the invention.

Claims (9)

Claims LU101393
1. A method for preparing an earth yellow brick from loess, comprising the following steps: crushing dry loess, adding silty-fine sand, ground slag, glass powder and an activator, stirring them uniformly with water, and feeding the resulting mixture into a brickmaking machine for brickmaking, wherein, the material ratio is 50-55% of loess, 20-25% of silty-fine sand, 10-15% of ground slag, 5-10% of glass powder and 3-5% of activator.
2. The method for preparing an earth yellow brick from loess according to claim 1, characterized in that the water content of the material uniformly stirred with water is 8%~12%.
3. The method for preparing an earth yellow brick from loess according to claim 1, characterized in that the loess is plain soil with less than 1% of organic matter that widely exists in Northwest, North, Central and East China.
4. The method for preparing an earth yellow brick from loess according to claim 1, characterized in that the silty-fine sand is light-yellow fine sand formed by fluvial outwash.
5. The method for preparing an earth yellow brick from loess according to claim 4, characterized in that the silty-fine sand is river sediment in the lower reaches of the Yellow River.
6. The method for preparing an earth yellow brick from loess according to claim |, characterized in that the ground slag is water-quenched slag sold by iron mills that is dried and ground into the fineness of more than 300 meshes.
7. The method for preparing an earth yellow brick from loess according to claim |, characterized in that the glass powder is industrial scrap from glass manufacturers or glass processing enterprises, and can be ground into the fineness of more than 150 meshes.
8. The method for preparing an earth yellow brick from loess according to claim 1, characterized in that the activator is composed of salt gypsum and white cement in a weight ratio of 0.5-1.5:1.
9. The method for preparing an earth yellow brick from loess according to claim 8, characterized in that the fineness of the salt gypsum is 200 meshes and that of the white cement is 200 meshes.
LU101393A 2018-10-09 2019-09-19 Method for preparing an earth yellow brick from loess. LU101393B1 (en)

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