CN111662021A - Cement-based composite cementing material containing waste clay brick powder and limestone powder - Google Patents
Cement-based composite cementing material containing waste clay brick powder and limestone powder Download PDFInfo
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- CN111662021A CN111662021A CN202010498419.XA CN202010498419A CN111662021A CN 111662021 A CN111662021 A CN 111662021A CN 202010498419 A CN202010498419 A CN 202010498419A CN 111662021 A CN111662021 A CN 111662021A
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- based composite
- clay brick
- waste clay
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Classifications
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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
- C04B11/00—Calcium sulfate cements
- C04B11/28—Mixtures thereof with other inorganic cementitious materials
-
- 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
-
- 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
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
Abstract
The invention provides a cement-based composite cementing material containing waste clay brick powder and limestone powder, which is characterized by comprising the following raw materials in parts by weight: 5-30 parts of waste clay brick powder, 5-30 parts of limestone powder, 52-81 parts of cement clinker, 2.8-4.0 parts of desulfurized gypsum and 0.02-0.1 part of water reducing agent. According to the invention, the waste clay bricks and the limestone powder are used as raw materials to prepare the cement-based composite cementing material, so that the preparation cost of the cementing material is reduced, the harm of waste to the environment is reduced while resources are saved, and in addition, the prepared cementing material can effectively reduce the hydration heat release and the volume shrinkage, and the volume stability of concrete or mortar is improved.
Description
Technical Field
The invention relates to a cement-based composite cementing material containing waste clay brick powder and limestone powder, belonging to the field of green building materials.
Background
At present, the urbanization construction of China is in a rapid development stage, and the demand for cement is continuously increased. During the cement production process, a large amount of carbon is producedEmission of CO thereof2The amount of discharge is considerable. In addition to the emission of large amounts of CO during the production and use of cement2Besides, the method can cause the consumption of a large amount of resources and energy and serious environmental pollution problems, thereby causing the destruction of the ecological environment. Therefore, China is gradually turning attention to novel cementing materials to replace the traditional cementing materials.
With the increasing pace of modern construction of cities, towns and villages in China, a large number of houses in cities and villages are disassembled, and the quantity of construction waste generated by the disassembly of the houses is rapidly increased, wherein the waste clay bricks account for a large proportion. China reportedly co-produced approximately 200 billion cubic meters of clay bricks in nearly 50 years, and most of these clay bricks will become solid waste in the next 50 years. Most of the brick wastes are randomly stacked or buried, the rough treatment method not only occupies a large amount of land resources, but also generates a large amount of dust in the stacking process, is easy to cause secondary pollution, seriously influences the health of residents and aggravates environmental pollution, and therefore, how to better utilize the brick wastes is a problem which needs high attention. The research shows that the waste clay brick contains active mineral components, wherein SiO is contained in the waste clay brick2With Al2O3Has high content and certain volcanic ash activity, and can be used as a potential active material.
The limestone resources of China are rich, a large amount of stone chips can be generated in the processes of producing limestone broken stones, machine-made sand and processing stones, the occupied site is used for stacking, and the environmental pollution is very easy to cause. Researches show that when limestone powder is used as an admixture, the performance of concrete, especially the volume stability of the concrete, can be improved to a certain extent, and shrinkage cracking is reduced. If the waste clay brick powder and limestone powder can be processed as a blending material to replace part of cement to prepare the composite cementing material, the cement consumption can be reduced, the cost is reduced, and the waste can be recycled, so that the method has a far-reaching significance for saving energy, reducing emission, changing waste into valuables, fully utilizing the existing resources and the like.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide a cement-based composite cementing material containing waste clay brick powder and limestone powder, which not only realizes the recycling of wastes, but also has the characteristics of low heat of hydration and good volume stability.
The technical scheme is as follows:
the invention provides a cement-based composite cementing material containing waste clay brick powder and limestone powder, which comprises the following components in parts by mass:
wherein:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 0 percent.
The water reducing agent is a commercially available powder product, and the water reducing rate is more than or equal to 20%.
The cement-based composite cementing material is prepared by respectively and independently grinding waste clay brick powder, limestone powder, cement clinker and desulfurized gypsum to corresponding fineness and then uniformly mixing.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1. the cement-based composite cementing material prepared by the invention has the advantages of wide raw material source, low price and lower cost compared with the traditional cementing material cement; and the construction waste clay brick is used as a raw material, so that the problem of treatment of the construction waste can be effectively solved, and occupation of land resources and pollution to the environment are avoided;
2. the low-carbon cementing material prepared by the invention reduces the cement consumption, reduces the consumption of natural resources and energy sources in cement production, reduces the emission of greenhouse gases, and has positive environmental benefits;
3. compared with common cement, the cement-based composite cementing material disclosed by the invention can reduce hydration heat by 10-35%, and reduce drying shrinkage by 7-30%, so that the cement-based composite cementing material has the characteristics of low heat release and high volume stability, and the main reasons are as follows: the limestone powder and the clay brick powder dilute mineral components in the cement and reduce hydration products, so that the hydration heat release of the composite cementing material can be reduced; the specific surface area of the doped clay brick powder is larger, the particle size is smaller, and the fine clay brick powder can be filled among cement particles and in the interface of hydration products, so that the particle gradation of a cementing material is improved, the compactness and the interface structure of a hydration system are optimized, the water migration is more difficult, and the drying shrinkage of the mortar can be reduced to a certain extent; on the other hand, the doped limestone powder also has a certain filling effect, and meanwhile, the limestone powder has higher elastic modulus, so that the limestone powder can be better stabilized and the deformation can be better inhibited.
Detailed Description
The present invention is further described below for better understanding, but it should not be understood that the present invention is applicable to the following examples, and those skilled in the art can make modifications and adaptations of the present invention based on the above disclosure without departing from the scope of the present invention.
Example 1:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after the standard curing for 28 days is 88.7 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release rate of the mortar is measured to be reduced by 7.7 percent compared with that of the common cement mortar, and the 60-day shrinkage rate of the mortar is reduced by 9.3 percent compared with that of the common cement mortar.
Example 2:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after the standard curing for 28 days is 94.0 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release rate of the mortar is measured to be reduced by 12.3 percent compared with that of the common cement mortar, and the 60-day shrinkage rate of the mortar is reduced by 7.7 percent compared with that of the common cement mortar.
Example 3:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after standard curing for 28 days is 72.4 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release is measured to be reduced by 22.7 percent compared with the common cement mortar, and the 60-day shrinkage is reduced by 12.4 percent compared with the common cement mortar.
Example 4:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after standard curing for 28 days is 78.6 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release rate of the mortar is measured to be reduced by 23.3 percent compared with that of the common cement mortar, and the 60-day shrinkage rate of the mortar is reduced by 16.3 percent compared with that of the common cement mortar.
Example 5:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after standard curing for 28 days is 67.5 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release rate of the mortar is measured to be reduced by 35.9 percent compared with that of the common cement mortar, and the 60-day shrinkage rate of the mortar is reduced by 18.6 percent compared with that of the common cement mortar.
Example 6:
a cement-based composite cementing material containing waste clay brick powder and limestone powder is prepared by respectively and independently grinding the following components to corresponding fineness and uniformly mixing the components in parts by mass:
the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent, and the brick is obtained by ball milling of the clay brick obtained by dismantling the building.
The specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
The powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
The cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
The water reducing rate of the polycarboxylic acid water reducing powder is more than or equal to 20 percent.
The cement-based composite cementing material is prepared into mortar according to the current standard GB/T17671, the compressive strength after standard curing for 28 days is 70.3 percent of that of the common cement mortar, and meanwhile, the 72-hour heat release rate of the mortar is measured to be reduced by 34.0 percent compared with that of the common cement mortar, and the 60-day shrinkage rate of the mortar is reduced by 27.0 percent compared with that of the common cement mortar.
Claims (8)
1. A cement-based composite cementing material containing waste clay brick powder and limestone powder is characterized in that: the cement-based composite cementing material comprises the following components in parts by mass:
2. the cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the specific surface area of the waste clay brick powder is 300-600 m2/kg，SiO2And Al2O3The sum of the weight contents is more than 70 percent.
3. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the specific surface area of the limestone powder is 300-600 kg/m3The weight content of CaO is 30-50%.
4. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the powder of the cement clinker and the desulfurized gypsum meets the condition that the residue of the cement clinker and the desulfurized gypsum sieved by a sieve pore with the size of 80 mu m is not more than 10 percent.
5. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the cement clinker comprises the following oxides in percentage by mass: 50-70% of CaO and SiO215～30％、Al2O34～10％、Fe2O32～8％。
6. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: CaO and SO in the desulfurized gypsum3The sum of the weight contents is more than 70 percent.
7. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the water reducing agent is a commercially available powder product, and the water reducing rate is more than or equal to 20%.
8. The cement-based composite cementitious material containing waste clay brick powder and limestone powder as claimed in claim 1, characterized in that: the cement-based composite cementing material is prepared by respectively and independently grinding waste clay brick powder, limestone powder, cement clinker and desulfurized gypsum to corresponding fineness and then uniformly mixing.
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| CN202010498419.XA CN111662021A (en) | 2020-06-04 | 2020-06-04 | Cement-based composite cementing material containing waste clay brick powder and limestone powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113979654A (en) * | 2021-10-21 | 2022-01-28 | 东南大学 | Gelling cyclic regeneration material of waste cement-based material and preparation method thereof |
| RU2777761C2 (en) * | 2021-11-08 | 2022-08-09 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" | Method for production of low-carbon cement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113979654A (en) * | 2021-10-21 | 2022-01-28 | 东南大学 | Gelling cyclic regeneration material of waste cement-based material and preparation method thereof |
| RU2777761C2 (en) * | 2021-11-08 | 2022-08-09 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" | Method for production of low-carbon cement |
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