CN110304885A - The cement mortar and preparation method thereof of high additive solid waste preparation - Google Patents
The cement mortar and preparation method thereof of high additive solid waste preparation Download PDFInfo
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- CN110304885A CN110304885A CN201910732691.7A CN201910732691A CN110304885A CN 110304885 A CN110304885 A CN 110304885A CN 201910732691 A CN201910732691 A CN 201910732691A CN 110304885 A CN110304885 A CN 110304885A
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- cement mortar
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- solid waste
- brick powder
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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
- 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
- C04B28/04—Portland 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
- 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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of cement mortar and preparation method thereof of high additive solid waste preparation, wherein based on every 100 parts of mass fractions, the cement mortar is the mixture of following component: 70~75 parts of second-hand brick powder, 15~20 parts of sintering desulfuration ash, 6~9 parts of slag powders, 2~4 parts of cement.
Description
Technical field
The present invention relates to the field of building materials more particularly to technical field of inorganic nonmetallic materials, specifically a kind of
Using second-hand brick powder and sintering desulfuration ash as main raw material(s), a small amount of slag powders and cement are added, by ingredient, are stirred,
The cement mortar and preparation method of the high additive solid waste preparation produced.
Background technique
It can remove along with a large amount of old house in urbanization process, and then a large amount of building waste can be generated.With Beijing, on
For the big cities such as sea, annual room rubbish of tearing open is up to tens million of tons.These main components for tearing room rubbish open are old common bricks, simultaneously
The impurity such as a small amount of mortar block, dirt and aerated blocks can be contained；For these construction wastes, current processing mode, substantially
By using broken, screening plant, aggregate and the powder for being processed into the partial sizes such as 0-5mm, 5-16mm and 16-31.5mm are further
Waste utilization, wherein the coarse aggregate of 5-16mm, 16-31.5mm can be used for producing the production of the building materials such as wall-building brick, water-permeable brick, roadbed material
Product；And account for the powder of the 0-5mm partial size of the 35%-40% of total amount then due to its water absorption rate is big, intensity is low, impurity content is high etc. because
Element, then be difficult to use in production of construction materials and recycling, thus by a large amount of heaps there are production scene, causes the waste of resource, and by
In in the process, fugitive dust is big, also will affect environment.
On the other hand, the sintering machine of steel plant's steelshop mostly uses greatly dry desulfurizing process to carry out flue gas desulfurization at present,
The desulfurizing byproduct of generation is sintering desulfuration ash, and main component is calcium sulfite and calcium carbonate, and pozzolanic activity is very low, activity system
Number only 30%-40%, and ordinary fly ash is 70%-80%, and the SO of sintering desulfuration ash3It is exceeded with chloride ion, it is difficult to use
In production of construction materials, becomes a kind of and dispose difficult waste.
Summary of the invention
Technical problem to be solved by the present invention lies in can efficiently use building to tear room rubbish, steel works sintering Desulphurization open
Etc. large low value solid waste, a kind of cement mortar prepared using it as the high additive solid waste of primary raw material is provided.
A kind of cement mortar of high additive solid waste preparation, feature is, based on every 100 parts of mass fractions, for the following group
The mixture of part:
70~75 parts of second-hand brick powder, 15~20 parts of sintering desulfuration ash, 6~9 parts of slag powders, 2~4 parts of cement.
As the preferred embodiment of the present invention, the quality sum of the second-hand brick powder and sintering desulfuration ash is 88-92 parts.
Also as the preferred embodiment of this cement mortar, the second-hand brick powder raw material is selected from and tears room rubbish open, by tearing room rubbish open
In waste and old fired brick, and the inevitable a small amount of impurity composition including mortar, dirt and aerated bricks.
Further, the partial size of the second-hand brick powder is 0-5mm.
Equally as the preferred embodiment of this cement mortar, the sintering desulfuration ash be selected from the flue gas of steel mill sintering machine into
The desulfurizing byproduct of row dry desulfurization, main chemical compositions are calcium sulfite and calcium carbonate.
Another technical problem to be solved by this invention is to provide a kind of system of the cement mortar of high additive solid waste preparation
Preparation Method, this method, including waste and old fired brick in room rubbish will be torn open and including the inevitable of mortar, dirt and aerated bricks
A small amount of impurity through broken, screening, obtain≤the second-hand brick powder of 5mm the step of, and according to 70~75 parts of second-hand brick powder, sintering
The step of 15~20 parts of Desulphurization, 6~9 parts of slag powders and 2~4 parts of cement of mass ratio are mixed.
Further, the flue gas that the sintering desulfuration ash is selected from steel mill sintering machine carries out the desulfurizing byproduct of dry desulfurization,
Its main chemical compositions is calcium sulfite and calcium carbonate.
Also further, when mixing, the quality sum of the second-hand brick powder and sintering desulfuration ash is 88-92 parts.
The cement mortar and preparation method thereof of high additive solid waste preparation by adopting the above technical scheme provides a kind of large
Low value solid waste (containing tear open room rubbish, sintering desulfuration ash) comprehensive utilization product, i.e., by ingredient, be mixed technique, production and
At a kind of cement mortar.This cement mortar is produced using ingredient, the technique of mixing, can contain 90% or more second-hand brick
Powder and sintering desulfuration ash, lime-ash dosage is high, and 28 days compression strength can reach 20MPa or more, and flexural strength can reach within 28 days
To 4MPa or more, can be widely used for building the engineerings such as levelling, building wall position.
Specific embodiment
A specific embodiment of the invention is described in further detail below.
The present invention provides a kind of high additive solid waste preparations prepared using second-hand brick powder and sintering desulfuration ash as primary raw material
Cement mortar.Using second-hand brick powder and sintering desulfuration ash as fine aggregate and filler (the two total accounts for 88%-92% mass ratio), with
A small amount of slag powders and cement are as cementitious material (the two total accounts for 8%-12% mass ratio), using ingredient, the work of mixing
Skill prepares a kind of cement mortar, and 28 days compression strength reaches 20MPa or more, and flexural strength reaches 4MPa or more within 28 days, can be extensive
For building the engineerings such as levelling, building wall position, solid waste can be largely dissolved.
The technical principle that the cement mortar generates intensity is to utilize slag powders, second-hand brick powder (part of < 0.08mm)
Pozzolanic activity is acted on using the alkaline excitation of a small amount of hardening cement mortar in cement, second-hand brick powder, while de- using sintering
The sulphate activation of sulphur ash promotes slag powders, second-hand brick powder to generate hydration reaction, forms hydrated product.And second-hand brick powder
A small amount of hardening cement mortar in end contains the aquations product such as hydrated calcium silicate, drated calcium aluminate, has " embryos " effect, can drop
The reaction energy barrier of low slag powders, second-hand brick powder (< 0.08mm) promotes it to generate hydration reaction.Following reaction equation table can be used
Show:
xCa(OH)2+SiO2+(n-1)H2O→xCaO·SiO2·nH2O
(1.5~2.0) CaOSiO2·aq+SiO2→ (0.8~1.5) CaOSiO2·aq
3CaO·Al2O3·6H2O+SiO2+mH2O→xCaO·SiO2·mH2O+yCaO·Al2O3·nH2O
xCa(OH)2+Al2O3+mH2O→xCaO·Al2O3·nH2O
3Ca(OH)2+Al2O3+2SiO2+mH2O→3CaO·Al2O3·2SiO2·nH2O
3CaO·Al2O3·6H2O+Ca(OH)2+6H2O→4CaO·Al2O3·13H2O
4CaO·Al2O3·13H2O+3(CaSO4·2H2O)+14H2O→3CaO·Al2O3·3CaSO4·32H2O+Ca
(OH)2
Using the particle of 0.08mm-5mm in second-hand brick powder as fine aggregate, skeletal support can be played the role of, improve mortar
Intensity.And the main component for tearing room rubbish open is old common brick, contains the impurity such as a small amount of mortar block, dirt and aerated blocks.To tearing room open
Rubbish is using broken, sieving technology, it can obtaining partial size is the powder of 0-5mm as second-hand brick powder raw material.Further, it presses
70~75 parts of brick powder as before, 15~20 parts of sintering desulfuration ash, 6~9 parts of slag powders, the mixing of the quality proportioning that 2~4 part of cement and
At cement mortar.
The sintering desulfuration ash is that the flue gas of steel mill sintering machine carries out the desulfurizing byproduct of dry desulfurization, main
Chemical component is CaSO3And CaCO3.The preparation method of above-mentioned cement mortar is to use through ingredient, be stirred technique production
Made of.
More specific embodiment will be provided to the present invention below.
The second-hand brick powder of the present invention is derived from the Baoshan District, Shanghai road Jin Hu treating construction waste base, and grain composition is shown in Table
Shown in 1.
Table 1
The technical performance of second-hand brick powder is shown in Table 2.
Table 2
The sintering desulfuration ash of the present invention is derived from the desulfurizer of Baosteel steelshop sintering machine, fineness (45 μm tail over)
32.6%, specific surface area 365m2/ kg, chemical component are shown in Table 3.
Table 3
| CaO | MgO | SiO2 | Al2O3 | Fe2O3 | SO3 | Attached water | The crystallization water | CaSO3 | f-CaO | Cl- |
| 53.94 | 7.0 | 0.39 | 1.39 | 4.61 | 3.25 | 0.39 | 4.30 | 35.1 | 1.6 | 0.18 |
Sintering desulfuration ash is a kind of high sulfur type lime-ash of high calcium, CaSO3、CaCO3、Fe2O3Content it is higher, and SiO2、Al2O3
Content it is lower.The activity of sintering desulfuration ash is very low, using " for the flyash in cement and concrete " GB/T 1596-
2017 method is tested, and sintering desulfuration ash 28d strength activity index is only 39%, and the 28d intensity of II grade of flyash is living
Sex index is more than 70%.
Slag powders use the S95 slag powders of Shanghai Baotian New Type Building Material Co., Ltd's production.
Cement uses the P.O42.5 cement of Shanghai Jinshan south Cement Co., Ltd production.
Referring to embodiment, the present invention is further illustrated.But it will be understood that embodiment is only illustrative, and
It should not provide constraints to protection scope of the present invention.
Embodiment 1
Second-hand brick powder, sintering desulfuration ash, slag powders, cement are taken from scene, transport laboratory back.Wherein sintering desulfuration ash,
Slag powders, cement seal save backup, and drying to constant weight at a temperature of 105-110 DEG C for old common brick powder, are sealed spare.
Test method is referring to " building mortar basic performance tests method standard " JGJ/T 70-2009.Keep cement mortar
Consistency be basically unchanged, appropriate adjustment water consumption, test ingredient be shown in Table 4.
Table 4
Test result is shown in Table 5.
Table 5
| Number | Consistency/mm | 28d compression strength/MPa | 28d flexural strength/MPa |
| 1 | 50 | 25.1 | 5.0 |
| 2 | 52 | 27.3 | 5.1 |
| 3 | 49 | 26.4 | 5.2 |
| 4 | 51 | 28.3 | 5.4 |
From table 4 and table 5:
(1) when the sum of dosage of second-hand brick powder and sintering desulfuration ash is that the sum of 90%, cement and dosage of slag powders are
When 10%, the 28d compression strength of the cement mortar reaches 25.1-28.3MPa, and 28d flexural strength reaches 5.0-5.4MPa.
(2) it when the dosage of cement, slag is constant, properly increases the dosage of second-hand brick powder, reduce the use of sintering desulfuration ash
Amount, mortar strength increase；When the dosage of second-hand brick powder, sintering desulfuration ash is constant, properly increases cement consumption, reduces mine
The dosage of ground-slag, mortar strength decrease.
Embodiment 2
The sum of the dosage for changing second-hand brick powder and sintering desulfuration ash, tests cement mortar.Test ingredient is shown in Table 6 institutes
Show.
Table 6
Test result is shown in Table 7.
Table 7
| Number | Consistency/mm | 28d compression strength/MPa | 28d flexural strength/MPa |
| 5 | 51 | 27.2 | 5.6 |
| 6 | 49 | 29.0 | 5.7 |
| 7 | 50 | 23.7 | 4.5 |
| 8 | 52 | 24.4 | 4.8 |
From table 6 and table 7:
(1) when the sum of the dosage of second-hand brick powder and sintering desulfuration ash is reduced to the sum of the dosage of 88%, cement and slag to mention
When up to 12%, mortar strength increases；
(2) when the sum of dosage of second-hand brick powder and sintering desulfuration ash is improved to the sum of the dosage of 92%, cement and slag drop
When down to 8%, mortar strength decreases.
The above description is only a preferred embodiment of the present invention, the protection scope being not intended to restrict the invention；For ability
For the technical staff in domain, can there are change and variation, should all include within protection scope of the present invention.
Claims (8)
1. a kind of cement mortar of high additive solid waste preparation, which is characterized in that based on every 100 parts of mass fractions, the cement mortar
For the mixture of following component:
70~75 parts of second-hand brick powder, 15~20 parts of sintering desulfuration ash, 6~9 parts of slag powders, 2~4 parts of cement.
2. the cement mortar of high additive solid waste preparation according to claim 1, which is characterized in that the second-hand brick powder and burning
The quality sum for tying Desulphurization is 88-92 parts.
3. the cement mortar of high additive solid waste preparation according to claim 1, which is characterized in that the second-hand brick powder raw material
Selected from tearing room rubbish open, by tearing the waste and old fired brick in room rubbish open, and it is inevitable few including mortar, dirt and aerated bricks
Measure impurity composition.
4. the cement mortar of high additive solid waste preparation according to claim 1, which is characterized in that the grain of the second-hand brick powder
Diameter is 0.08mm-5mm.
5. the cement mortar of high additive solid waste preparation according to claim 1, which is characterized in that the sintering desulfuration ash choosing
The desulfurizing byproduct of dry desulfurization is carried out from the flue gas of steel mill sintering machine, main chemical compositions are calcium sulfite and carbonic acid
Calcium.
6. a kind of preparation method of the cement mortar of high additive solid waste preparation, which is characterized in that useless in room rubbish including that will tear open
Old fired brick and inevitable a small amount of impurity including mortar, dirt and aerated bricks obtain 0.08mm- through broken, screening
The step of second-hand brick powder of 5mm partial size, and according to 70~75 parts of second-hand brick powder, 15~20 parts of sintering desulfuration ash, slag powders 6~
The step of 9 parts and 2~4 parts of cement of mass ratio is mixed.
7. preparation method according to claim 6, which is characterized in that the sintering desulfuration ash is selected from steel mill sintering machine
Flue gas carries out the desulfurizing byproduct of dry desulfurization, and main chemical compositions are calcium sulfite and calcium carbonate.
8. preparation method according to claim 6, which is characterized in that when mixing, the second-hand brick powder and sintering desulfuration ash
Quality sum be 88-92 parts.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116354659A (en) * | 2023-05-22 | 2023-06-30 | 北京鼎创环保有限公司 | Novel roadbed material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515588A (en) * | 2011-12-20 | 2012-06-27 | 河北科技大学 | Ecotypic cementing material |
-
2019
- 2019-08-09 CN CN201910732691.7A patent/CN110304885A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515588A (en) * | 2011-12-20 | 2012-06-27 | 河北科技大学 | Ecotypic cementing material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116354659A (en) * | 2023-05-22 | 2023-06-30 | 北京鼎创环保有限公司 | Novel roadbed material and preparation method thereof |
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