CN113636768A - Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick - Google Patents
Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick Download PDFInfo
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- CN113636768A CN113636768A CN202110809880.7A CN202110809880A CN113636768A CN 113636768 A CN113636768 A CN 113636768A CN 202110809880 A CN202110809880 A CN 202110809880A CN 113636768 A CN113636768 A CN 113636768A
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- clay brick
- micro powder
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- brick
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- 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
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the technical field of construction waste treatment, and particularly discloses excited clay brick micro powder and a preparation method thereof, a cementing material and a regenerated brick. An excited clay brick micro powder, which comprises the raw materials of construction waste clay brick micro powder and alcamines excitant with the weight ratio of 100 (0.01-0.06); the alcamines excitant is at least one selected from diethanol monoisopropanolamine and triisopropanolamine; the preparation method comprises the following steps: firstly, crushing the construction waste clay brick to obtain construction waste clay brick micro powder; then adding an alcamines excitant into the construction waste clay brick micro powder and mixing to obtain excited clay brick micro powder; it is used as raw material of cementing material and regenerated brick. The strength activity of arousing the clay brick miropowder has been showing to this application has been improved, has improved the quality of using the regeneration brickwork of arousing the clay brick miropowder greatly.
Description
Technical Field
The application relates to the technical field of construction waste treatment, in particular to excited clay brick micro powder and a preparation method thereof, a cementing material and a regenerated brick.
Background
According to statistics, 500-600 tons of construction waste can be generated in the construction process of every 1 ten thousand square meters of buildings, and 7000-1.2 tons of construction waste can be generated when 1 ten thousand square meters of old buildings are dismantled. The quantity of the construction waste in China already accounts for more than 30% of the total quantity of the urban waste.
The clay brick accounts for a large part of the total amount of the construction waste, is mainly made of a pozzolanic material and contains active mineral components, wherein the content of silica and alumina is high, and the clay brick can be used as a cementing material to replace admixtures such as cement, fly ash and mineral powder after being ground to be made into a recycled brick, so that the recycling of the construction waste clay brick is realized. But the recycling rate of the clay brick is seriously reduced due to the unfavorable characteristics of low compressive strength, high water absorption and the like of the clay brick.
At present, the clay brick micro powder is excited mainly by means of composite excitation, alkali excitation, sulfate excitation and the like so as to improve the strength activity index of the clay brick, thereby improving the recovery rate of the clay brick; however, in the practical application of brickwork, the high-calcium ground mineral powder which needs to be doped by composite excitation is in short supply in the market, and the quality is difficult to control, thus being not beneficial to mass production; the alkali-activated and sulfate-activated means can seriously prevent alkali from being generated in the brickwork after the brickwork is formed, thereby greatly reducing the strength of the brickwork.
Disclosure of Invention
In order to improve the quality of the regenerated brick, the application provides the excited clay brick micro powder, the preparation method thereof, the cementing material and the regenerated brick.
In a first aspect, the application provides an excitation clay brick micro powder, which adopts the following technical scheme:
the excited clay brick micro powder comprises the raw materials of construction waste clay brick micro powder and alcamines excitant in a weight ratio of 100 (0.01-0.06);
the fineness of the building garbage clay brick micro powder is 0.45mm-0.6 mm;
the alcamines excitant is at least one of diethanol monoisopropanolamine and triisopropanolamine.
By adopting the technical scheme, the clay brick micro powder is excited by using the alcamines exciting agent, and reacts with active Al2O3 and SiO2 in the vitreous body through complexation to promote the breakage of Si-O and Al-O bonds, so that the vitreous body is depolymerized, more fine C-S-H and C-A-H gels are generated through reaction, the hydration efficiency is enhanced, more hydration products are generated by exciting the clay brick micro powder and water, and the application quality of the clay brick micro powder is effectively improved.
Preferably, the alcoholamines excitant is diethanol monoisopropanolamine, and the weight ratio of the diethanol monoisopropanolamine to the building rubbish clay brick micro powder is 100 (0.01-0.03).
Preferably, the alcoholamines excitant is triisopropanolamine, and the weight ratio of triisopropanolamine to the building garbage clay brick micro powder is 100 (0.04-0.06).
Preferably, the content of the concrete micro powder in the construction waste clay brick micro powder is lower than 20 wt%.
By adopting the technical scheme, the activity strength of the concrete micro powder is lower, and when the content of the concrete micro powder in the construction waste clay brick micro powder is lower than 20wt%, the influence on the whole activity strength of the construction waste clay brick micro powder is smaller.
In a second aspect, the application provides a preparation method of the excited clay brick micro powder, which adopts the following technical scheme:
physical excitation: taking the construction waste clay brick, and crushing to obtain construction waste clay brick micro powder;
chemical excitation: adding alcohol amine activator into the building waste clay brick micro powder according to the proportion, and mixing to obtain the activated clay brick micro powder.
By adopting the technical scheme, the construction waste clay brick micro powder is physically excited, so that the activity strength of the construction waste clay brick micro powder is enhanced; and then adding an alcamines excitant which accounts for 0.01-0.06% of the weight of the construction waste clay brick micro powder into the construction waste clay brick micro powder to prepare the excited clay brick micro powder, thereby greatly improving the activity strength of the excited clay brick micro powder.
Preferably, the crushing mode is ball milling.
In a third aspect, the present application provides a cementitious material comprising cement and the above activated clay brick micro powder, wherein the addition amount of the cement and the activated clay brick micro powder accounts for 70-100wt% of the total amount of the cementitious material, and the addition amount of the activated clay brick micro powder accounts for 0.01-30wt% of the total amount of the cementitious material.
By adopting the technical scheme, the maximum addition amount of the excited clay brick micro powder can reach 30wt% of the total amount of the cementing material, and the recycling rate of the building waste clay bricks is greatly improved.
In a fourth aspect, the application provides a recycled brick, which comprises the following raw materials, by weight, 300 portions of the cementing material, 1550 portions of the coarse aggregate, 550 portions of the fine aggregate, 650 portions of the water, and 150 portions of the water.
By adopting the technical scheme, the recycled brick has the advantages of high compressive strength and high durability; when the normal maintenance is carried out for 28 days, the compressive strength can reach 40MPa, the mass loss rate is less than 1.9 percent, and the strength loss rate is less than 2.6 percent; the compressive strength and the durability of the cement mortar are basically close to the quality of the cement mortar when the cement mortar is used as the cementing material in normal curing for 72 d; not only realizes the recycling of the construction waste clay bricks, but also ensures the application quality of the regeneration brickwork.
In summary, the present application has the following beneficial effects:
1. the alcohol amine activator is used for exciting the clay brick micro powder, and the clay brick micro powder reacts with active Al2O3 and SiO2 in a vitreous body through complexation to promote Si-O and Al-O bond breakage, so that the vitreous body is depolymerized, more fine C-S-H and C-A-H gel are generated through reaction, the hydration efficiency is enhanced, the clay brick micro powder is excited to generate more hydration products with water, and the strength of the clay brick micro powder is effectively improved.
2. Triisopropanolamine is preferably adopted as an alcamines excitant, and when the weight ratio of triisopropanolamine to the building rubbish clay brick micro powder is 100 (0.04-0.06), the strength activity indexes of the excited clay brick micro powder are all more than 75%; and when the mixing amount of the triisopropanolamine accounts for 0.02 percent of the total amount of the construction waste clay brick micro powder, the strength activity index is as high as 81.2 percent.
3. The recycled brick has the advantages of high compressive strength and high durability; when the normal maintenance is carried out for 28 days, the compressive strength can reach 40MPa, the mass loss rate is less than 1.9 percent, and the strength loss rate is less than 2.6 percent; the compressive strength and the durability of the cement mortar are basically close to the quality of the cement mortar when the cement mortar is used as the cementing material in normal curing for 72 d; and the maximum addition amount of the excited clay brick micro powder reaches 30wt% of the total amount of the cementing material, so that the high-efficiency recycling of the building waste clay bricks is realized, and the application quality of the regenerated brickwork is ensured.
Detailed Description
The present application will be described in further detail below with reference to preparation examples, comparative examples, and application examples.
Table 1 partial sources of raw materials
| Raw materials | Manufacturer of the product |
| Cement | Tangshan Hongye Cement Co., Ltd. |
| Diethanol monoisopropanolamine | Jiangyin Chuanglin chemical Co Ltd |
| Triisopropanolamine | Henan Shaoyang chemical products Co Ltd |
The preparation method of the excited clay brick micro powder comprises the following steps:
physical excitation: taking the construction waste clay brick, and grinding the construction waste clay brick by a ball mill or a cement mill to obtain construction waste clay brick micro powder with the fineness of 0.045mm-0.06 mm;
chemical excitation: adding an alcamines excitant which accounts for 0.01 to 0.06 percent of the weight of the construction waste clay brick micro powder into the construction waste clay brick micro powder; mixing to obtain activated clay brick micropowder.
Table 2 raw material ratios and preparation conditions of activated clay brick micro powder provided in preparation examples 1 to 9
Table 3 raw material ratios and preparation conditions of activated clay brick micro powder provided in preparation examples 10 to 18
TABLE 4 raw material ratios and preparation conditions for preparing the activated clay brick micro powders provided in comparative examples 1 to 8
The strength activity index, 3d flexural strength, compressive strength, 28 flexural strength and compressive strength of the excited clay brick micro powder in the preparation examples 1 to 18 and the preparation comparative examples 1 to 8 were measured according to the strength activity index experimental method specified in GB/T1596 fly ash for use in cement and fly ash.
TABLE 5 results of measurements of strength and strength-activity index of activated clay brick micropowder provided in preparation examples 1 to 18
TABLE 6 detection results of strength and strength activity index of activated clay brick micro powder provided in comparative examples 1 to 8
Combining the strength and strength activity index detection results of preparation examples 1-18 and preparation comparative examples 1-8 in tables 5 and 6, it can be seen that the strength activity of the excited clay brick micro powder in preparation examples 1-18 is more than 70%, the requirement of the admixture used in cement and concrete for the strength activity index is met, and the excited clay brick micro powder can be used as a cementing material in the production and manufacturing of bricks.
By comparing the detection results of the preparation examples 1 to 5 and the preparation comparative examples 3 to 4 and 7, the strength activity index of the activated clay brick micro powder is increased and then decreased along with the increase of the amount of triisopropanolamine doped into the construction waste clay brick micro powder, and when the amount of triisopropanolamine is 0.04 to 0.06 percent of the total amount of the construction waste clay brick micro powder, the strength activity indexes are all more than 75 percent; and when the mixing amount of the triisopropanolamine accounts for 0.05 percent of the total amount of the construction waste clay brick micro powder, the strength activity index is the highest and reaches 78.8 percent.
By comparing the detection results of the preparation examples 10 to 14 and the preparation comparative examples 1 to 2 and 7, the strength activity index of the activated clay brick micro powder is increased and then decreased along with the increase of the amount of the diethanol monoisopropanolamine doped in the building rubbish clay brick micro powder, and the strength activity indexes are all more than 75% when the amount of the diethanol monoisopropanolamine doped accounts for 0.01 to 0.03 percent of the total amount of the building rubbish clay brick micro powder; and when the mixing amount of the triisopropanolamine accounts for 0.02 percent of the total amount of the construction waste clay brick micro powder, the strength activity index is the highest and reaches 81.2 percent.
The alcohol amine activator can promote the secondary hydration reaction of clay brick micro powder under the alkaline condition, and mainly reacts with active Al2O3 and SiO2 in a vitreous body through complexation to promote the breakage of Si-O and Al-O bonds, so that the vitreous body is depolymerized, and more fine C-S-H and C-A-H gels are generated through the reaction, and the strength is improved.
By respectively comparing preparation examples 4 and 6; the detection results of the preparation examples 11 and 15 show that the ball milling and crushing mode of the construction waste clay brick is superior to the grinding and crushing mode, because the fineness of the micro powder of the construction waste clay brick is relatively smaller and the activity of the micro powder of the construction waste clay brick is higher when the ball milling and crushing mode is used for crushing the construction waste clay brick;
through the detection results of the comparative preparation examples 4, 7-8, 11, 16-18 and the comparative preparation examples 5 and 6, the strength activity indexes are all kept above 70% when the content of the concrete micro powder in the construction waste micro powder is lower than 20% of the total amount of the construction waste micro powder; this is because the strength activity of the concrete micropowder is low, and when the addition amount of the concrete micropowder exceeds 20% of the total amount of the construction waste micropowder, the strength activity of the activated clay brick micropowder is greatly reduced.
Table 7 formulation of regenerative brickwork provided in application examples 1 to 10
Table 8 ingredients of regenerative brickwork according to comparative examples 1-9
The fine aggregate and the coarse aggregate are both prepared from construction waste serving as raw materials, and the construction waste with the fineness of 0.16-4.75mm is taken as the fine aggregate and the construction waste with the fineness of 5-10mm is taken as the coarse aggregate after impurity removal and crushing and screening.
The activated clay brick micro powder provided in the above examples and comparative examples was prepared by the following preparation method.
The preparation method of the excited clay brick micro powder comprises the following steps:
(1) mixing coarse aggregate and fine aggregate, adding into a stirrer, adding 30wt% of water, and stirring for 30s to prepare first mortar;
(2) mixing the cementing material with the first mortar, and stirring for 55s to prepare second mortar;
(3) adding the rest 70 wt% of water into the second mortar, and stirring for 1.5min to obtain third mortar;
(4) and (5) filling the third mortar into a brick laying mold with the thickness of 200mm multiplied by 100mm multiplied by 60mm, and performing standard maintenance for 72d to obtain the regenerated brick.
The above examples and comparative examples were subjected to various property tests, and the test results are shown in Table 8.
The compressive strength and durability of the recycled bricks are detected according to GB/T28635 concrete pavement bricks, and the compressive strength of the recycled bricks 7d, 28d and 72d and the mass loss and strength loss of the recycled bricks 28d are measured.
Table 9 test results of various properties of a recycled brick provided in application examples 1 to 10 and comparative examples 1 to 9
As can be seen from table 9, the recycled brick provided in the embodiment of the present application has high compressive strength and good durability; when the normal maintenance is carried out for 28 days, the compressive strength can reach 40MPa, the mass loss rate is less than 1.9 percent, and the strength loss rate is less than 2.6 percent; the compressive strength and the durability of the cement mortar are basically close to the quality of the cement mortar when the cement mortar is used as the cementing material in normal curing for 72 d;
moreover, the maximum doping amount of the excited clay brick micro powder in the cementing material of the recycled brick under the premise of ensuring the quality can reach 30%, the utilization rate of the construction waste clay brick is greatly improved, and the recycled brick is more energy-saving and environment-friendly.
The specific preparation examples are only for explaining the application and are not limiting to the application, and those skilled in the art can make modifications without inventive contribution to the preparation examples as required after reading the specification, but are protected by patent laws within the scope of the claims of the application.
Claims (8)
1. The excited clay brick micro powder is characterized in that the raw materials comprise (by weight portion) 100 (0.01-0.06) construction waste clay brick micro powder and alcamines excitant;
the fineness of the building garbage clay brick micro powder is 0.45mm-0.6 mm;
the alcamines excitant is at least one of diethanol monoisopropanolamine and triisopropanolamine.
2. The activated clay brick micropowder of claim 1, wherein: the alcamines excitant is diethanol monoisopropanolamine, and the weight ratio of the diethanol monoisopropanolamine to the building rubbish clay brick micro powder is 100 (0.01-0.03).
3. The activated clay brick micropowder of claim 1, wherein: the alcamines excitant is triisopropanolamine, and the weight ratio of triisopropanolamine to the building garbage clay brick micro powder is 100 (0.04-0.06).
4. The activated clay brick micropowder of claim 1, wherein: the content of concrete micro powder in the construction waste clay brick micro powder is lower than 20 wt%.
5. The method for preparing activated clay brick micropowder according to any one of claims 1 to 4, comprising the steps of:
physical excitation: taking the construction waste clay brick, and crushing to obtain construction waste clay brick micro powder;
chemical excitation: adding alcohol amine activator into the building waste clay brick micro powder according to the proportion, and mixing to obtain the activated clay brick micro powder.
6. The method of claim 5, wherein: the crushing mode is ball milling.
7. A cementitious material comprising cement and activated clay brick micropowder according to any one of claims 1 to 4, said cement and said activated clay brick micropowder being added in an amount of 70 to 100% by weight based on the total amount of the cementitious material, and said activated clay brick micropowder being added in an amount of 0.01 to 30% by weight based on the total amount of the cementitious material.
8. The recycled brick is characterized by comprising 400 parts by weight of the cementing material in claim 7, 1550 parts by weight of coarse aggregate, 650 parts by weight of fine aggregate and 200 parts by weight of water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110809880.7A CN113636768A (en) | 2021-07-17 | 2021-07-17 | Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110809880.7A CN113636768A (en) | 2021-07-17 | 2021-07-17 | Excited clay brick micro powder and preparation method thereof, cementing material and regenerated brick |
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| CN113636768A true CN113636768A (en) | 2021-11-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591573A (en) * | 2015-01-28 | 2015-05-06 | 上海市建筑科学研究院 | Waste brick superfine regenerated active micro-powder and preparation method thereof |
| CN106064897A (en) * | 2016-05-26 | 2016-11-02 | 甘肃德龙生态建材有限公司 | A kind of ecological Binder Materials |
| CN106082881A (en) * | 2016-06-29 | 2016-11-09 | 山东建筑大学 | A kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof |
| KR20190111173A (en) * | 2018-03-21 | 2019-10-02 | 이근성 | Brick compositions comprising coffee powder and manufacturing method thereof |
-
2021
- 2021-07-17 CN CN202110809880.7A patent/CN113636768A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591573A (en) * | 2015-01-28 | 2015-05-06 | 上海市建筑科学研究院 | Waste brick superfine regenerated active micro-powder and preparation method thereof |
| CN106064897A (en) * | 2016-05-26 | 2016-11-02 | 甘肃德龙生态建材有限公司 | A kind of ecological Binder Materials |
| CN106082881A (en) * | 2016-06-29 | 2016-11-09 | 山东建筑大学 | A kind of paving brick utilizing discarded clay brick to prepare and preparation method thereof |
| KR20190111173A (en) * | 2018-03-21 | 2019-10-02 | 이근성 | Brick compositions comprising coffee powder and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李秋义等: "《固体废弃物在绿色建材中的应用》", 30 April 2019, 中国建材工业出版社 * |
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