CN107056202A - Carbonization slag cement prepares accelerator and its application process of low-carbon binder materials - Google Patents
Carbonization slag cement prepares accelerator and its application process of low-carbon binder materials Download PDFInfo
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- CN107056202A CN107056202A CN201710396833.8A CN201710396833A CN107056202A CN 107056202 A CN107056202 A CN 107056202A CN 201710396833 A CN201710396833 A CN 201710396833A CN 107056202 A CN107056202 A CN 107056202A
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- Prior art keywords
- accelerator
- slag
- binder materials
- caco
- flyash
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- 239000002893 slag Substances 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 title claims abstract description 44
- 239000004568 cement Substances 0.000 title claims abstract description 38
- 239000011230 binding agent Substances 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 10
- 238000003763 carbonization Methods 0.000 title abstract description 40
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 13
- 239000011707 mineral Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 11
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 238000005255 carburizing Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 239000002131 composite material Substances 0.000 abstract description 8
- 239000004566 building material Substances 0.000 abstract description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 15
- 238000007906 compression Methods 0.000 description 15
- 238000012423 maintenance Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 238000011068 loading method Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 229910001341 Crude steel Inorganic materials 0.000 description 2
- 239000012496 blank sample Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229960003340 calcium silicate Drugs 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241000876852 Scorias Species 0.000 description 1
- -1 accelerator Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0006—Waste inorganic 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/066—Magnesia; Magnesium hydroxide
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/10—Acids or salts thereof containing carbon in the anion
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses the accelerator that carbonization slag cement prepares low-carbon binder materials, belongs to energy-saving and emission-reduction and Ecological Building Materials field.Mineral accelerator flyash, CaCO are added in slag cement composite gelled material3Crystal seed, alkaline accelerator (Mg (OH)2And Na2CO3), acid accelerator (C2H2O4) several accelerator are therein one or two kinds of or three kinds, the accelerator has preferable facilitation.After accelerator adds, the easy carbonization component activity in slag cement binder materials is improved, with CO2It is dissolved in the H of water vapour formation2CO3It is easier to react, generates stable carbonate.Wherein Mg (OH)2With C2H2O4Facilitation effect preferably, considerably increase carbonization after slag cement composite gelled material intensity, CO is consumed to a greater degree2, prepare low-carbon binder materials of good performance.
Description
Technical field
The invention belongs to energy-saving and emission-reduction and Ecological Building Materials field, and in particular to carbonization slag-cement prepares low-carbon gelling material
The accelerator of material and its application process.
Background technology
A kind of industrial solid waste residue that slag is discharged when being steel mill production steel., China's crude steel yield 8.2 hundred million in 2014
Ton, slag yield is the 10%~15% of crude steel yield, is 0.82~1.2 hundred million tons.At present there are about 70% slag be in store up
With landfill state, utilization rate is far below developed country, if these slags can be recycled, can not only reclaim substantial amounts of valuable gold
Category, moreover it is possible to mitigate environmental pressure.
Research finds that the mineral composition of slag and cement are closely similar, only because the difficult mill component in slag can not be abundant
Refinement makes its part silicate mineral be difficult to give play to potential gelling.By accelerated carbonation technical finesse slag, steel can be made
Calcium-silicate and CO in slag2React the stable carbonate of generation, on the one hand, can reduce CO2Atmospheric pressure is alleviated in discharge,
On the other hand, slag can be turned waste into wealth, has both solved slag and largely stored up problem, many building material products are developed again.
Occur fixing CO using Comprehensive Utilization of Steel Slag in the prior art2Method (A of CN 102671519, publication date
On September 19th, 2012) so that CO2It is permanent cured to be stored in slag.The utilization also to the slag that is carbonized has been done greatly in the prior art
Measure good try：Chinese invention patent application (publication date on November 23rd, 2016) such as the A of publication number CN 106145878 is public
Open a kind of CO2Mineralising prepared from steel slag is for light building material；For another example the A of publication number CN 103992054 Chinese invention patent application is (open
Days 2014 on Augusts 20) open carbonatation steel scoria aggregate and preparation method thereof.
However, the performance of carbonization product is influenceed by its chemical composition and microstructure etc., carbonized maintaining low strength, shadow
Ring the effect that carbonized maintaining prepares construction material.If promoted using accelerator in material can carbonization component reaction, both may be used
The intensity of material is improved, more CO can be consumed again2, this will be undoubtedly a significant job.
The content of the invention
Goal of the invention：For deficiency of the prior art, the present invention provides several carbonization slag-cement and prepares low-carbon gelling
The accelerator of material, promotes the generation of composite carbonization product, improves the intensity of composite gelled material, consume to a greater degree
CO2。
Technical scheme：The accelerator that the carbonization slag cement that the present invention is provided prepares low-carbon binder materials is：Mineral promote
Agent flyash, CaCO3Crystal seed, alkaline accelerator (Mg (OH)2And Na2CO3), acid accelerator (C2H2O4) one kind in four kinds or
Two or three.
Described alkaline accelerator Mg (OH)2Or Na2CO3；Acid accelerator is C2H2O4。
For the present invention, can have with several technical schemes：
Scheme one：The accelerator can be mineral accelerator flyash, CaCO3Crystal seed, alkaline accelerator (Mg (OH)2Or
Na2CO3), acid accelerator (C2H2O4) any of four kinds.
Scheme two：The accelerator can be mineral accelerator flyash and Mg (OH)2Or Na2CO3Mixture；Or be ore deposit
Thing accelerator flyash and C2H2O4Mixture.
Scheme three：The accelerator can be CaCO3Crystal seed and Mg (OH)2Or Na2CO3Mixture；Or be CaCO3Crystal seed with
C2H2O4Mixture.
Scheme four：The accelerator can be mineral accelerator flyash, CaCO3Crystal seed and Mg (OH)2Or Na2CO3Mixing
Thing；Or be mineral accelerator flyash, CaCO3Crystal seed and C2H2O4Mixture.
Present invention also offers the application process of above-mentioned accelerator, it is characterised in that in slag-cementitious material
The middle carburizing reagent added in accelerator promotion binder materials.
Specifically, application of the present invention, slag weight accounts for the 10~70% of slag-cement cementitious material gross weight.
Further, a kind of accelerator addition is individually added to be the 1%~5% of binder materials gross weight.
When using scheme two or scheme three, flyash or CaCO3Seed charge for binder materials gross weight 2%~
4%, acid accelerator or alkaline accelerator addition are the 2%~4% of the amount of slag, and the total addition of accelerator is no more than steel
The 6% of slag-cement cementitious material gross weight.
When using scheme four, flyash addition is 1%~3%, CaCO of binder materials gross weight3Seed charge
For the 1%~3% of binder materials gross weight, acid accelerator or alkaline accelerator addition is binder materials gross weight 2%
~4%, the total addition of accelerator is no more than the 6% of slag-cement cementitious material gross weight.
Present invention also offers specific implementation steps, specifically, above-mentioned cement is the normal silicate water of P.O 42.5
Mud；Slag used is Jiangsu Huaian steel plant vessel slag；Flyash is commercially available second-level ash；Mg(OH)2、CaCO3、Na2CO3、
C2H2O4Chemical analysis pure reagent.
Specific step is as follows：
(1) with PE 60mm × 100mm type jaw crushing crusher machine block steel slags, then through the ball mill powder of SM φ 500 × 500
1h is ground, the slag after grinding is loaded into ZBSX 92A type shocking type standard vibrating sieving machines, 0.075~0.150mm slags are filtered out micro-
Powder；
(2) cement, slag micro powder, accelerator, water are weighed by a certain percentage, are mixed evenly；
(3) slurry made from step (2) is poured into jolt ramming in 20mm × 20mm × 20mm mould to be molded, temperature 20 is put into
DEG C, the 12h demouldings are conserved in the curing box of humidity 95%；
(4) gained test block after the demoulding is put into carbonization kettle and be carbonized, Carbonization Conditions are：40~120 DEG C of temperature, CO2Pressure 1
~5MPa, 3~24h of carbonization time.It is preferred that, 60~90 DEG C of temperature, CO22~3MPa of pressure, 3~12h of carbonization time；
(5) carbonization takes out test block after terminating, and continues to be put into curing box conserving to 3d and 28d, is rolled over electro-hydraulic servo resistance to compression
All-in-one tests its mechanical property.
Beneficial effect：(1) carbonization slag-cement of the present invention prepares the accelerator of low-carbon binder materials, implements step
Rapid simple, the accelerator of addition is cheap and easy to get, it is to avoid cumbersome accelerator manufacturing process, time saving and energy saving；
(2) carbonization slag-cement of the present invention prepares the accelerator of low-carbon binder materials, introduces accelerator and promotes glue
Carburizing reagent in gel material, makes the calcium-silicate and CO in material2It is dissolved in the H of water vapour formation2CO3It is easier to react,
The carbonate of more stabilizations is generated, resulting product intensity is improved, and consumes more CO2。
Brief description of the drawings
The XRD of cement-slag composite gel material after Fig. 1 carbonizations
Embodiment：
The present invention is further described in detail below in conjunction with specific embodiment and accompanying drawing.
Cement after comparative example 1, embodiment 2, embodiment 6, the carbonization of embodiment 9-slag plural gel material is shown in Fig. 1
The XRD spectrum of material.
Wherein (a) is the XRD spectrum of comparative example 1, and (b) is the XRD spectrum of embodiment 6, and (c) is the XRD of embodiment 2
Spectrum, (d) is the XRD spectrum of embodiment 9.
In figure, 1 mark is calcium hydroxide (Ca (OH)2) diffraction maximum, 2 mark be calcite (CaCO3) diffraction
Peak, 3 marks are aragonite (CaCO3) diffraction maximum.
It will be appreciated by those skilled in the art that these embodiments are merely to illustrate the present invention, it is not limited in any way
The scope of the present invention.
Embodiment 1
Weigh cement 70g, slag 30g, CaCO33g, water 28g, is mixed evenly, and loads 20mm × 20mm × 20mm
Mould in jolt ramming be molded, be put into 20 DEG C of temperature, the curing box of humidity 95% conserve 12h the demoulding, move into carbonization kettle in be carbonized
12h, Carbonization Conditions are：90 DEG C of temperature, CO2Pressure 3MPa.Carbonization continues to be put into curing box after terminating to be conserved to 3d and 28d,
Its mechanical property is tested with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 2
Weigh cement 70g, slag 30g, Mg (OH)23g, water 28g, is mixed evenly, and loading 20mm × 20mm ×
Jolt ramming is molded in 20mm mould, and maintenance and carbonization mode are same as Example 1.
Embodiment 3
Weigh cement 70g, slag 30g, Na2CO33g, water 28g, is mixed evenly, and loads 20mm × 20mm × 20mm
Mould in jolt ramming be molded, maintenance be carbonized mode it is same as Example 1.
Embodiment 4
Weigh cement 70g, slag 30g, C2H2O43g, water 28g, is mixed evenly, and loads 20mm × 20mm × 20mm
Mould in jolt ramming be molded, maintenance be carbonized mode it is same as Example 1.
Embodiment 5
Cement 70g, slag 30g, flyash 3g, water 28g are weighed, is mixed evenly, loads 20mm × 20mm × 20mm
Mould in jolt ramming be molded, maintenance be carbonized mode it is same as Example 1.
Comparative example 1
Cement 70g, slag 30g, water 28g are weighed, is mixed evenly, is shaken in the mould for being fitted into 20mm × 20mm × 20mm
Real shaping, maintenance and carbonization mode are same as Example 1.
Influence of the different accelerator of table 1 to the slag-cement micro-powder composite gelled material performance that is carbonized
Be compared as can be seen from Table 1 with not mixing the blank sample of accelerator, addition accelerator after, the 3d of test block and
28d intensity has different degrees of raising, illustrates that this 5 kinds of accelerator have to slag-cement micro-powder composite material strength raising
Facilitation；Wherein addition Mg (OH)2It is obviously improved as the intensity of test block of accelerator, the 3d compression strength of carbonization treatment is compared with carbon
The blank sample (cement 70%, slag micro powder 30%) for changing processing improves 12.0%, 28d compression strength raising 29.0%.
Embodiment 6
Weigh cement 70g, slag 30g, Mg (OH)21g, water 28g, is mixed evenly, and loading 20mm × 20mm ×
Jolt ramming is molded in 20mm mould, and maintenance and carbonization mode are same as Example 1.Carbonization continues to be put into curing box after terminating supports
Shield tests its mechanical property to 3d and 28d with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 7
Weigh cement 70g, slag 30g, Mg (OH)22g, water 28g, is mixed evenly, and loading 20mm × 20mm ×
Jolt ramming is molded in 20mm mould, and maintenance and carbonization mode are same as Example 1.Carbonization continues to be put into curing box after terminating supports
Shield tests its mechanical property to 3d and 28d with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 8
Weigh cement 70g, slag 30g, Mg (OH)24g, water 28g, is mixed evenly, and loading 20mm × 20mm ×
Jolt ramming is molded in 20mm mould, and maintenance and carbonization mode are same as Example 1.Carbonization continues to be put into curing box after terminating supports
Shield tests its mechanical property to 3d and 28d with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 9
Weigh cement 70g, slag 30g, Mg (OH)25g, water 28g, is mixed evenly, and loading 20mm × 20mm ×
Jolt ramming is molded in 20mm mould, and maintenance and carbonization mode are same as Example 1.Carbonization continues to be put into curing box after terminating supports
Shield tests its mechanical property to 3d and 28d with electro-hydraulic servo resistance to compression folding all-in-one.
Table 2Mg (OH)2Influence of the addition to the cement-slag micro powder composite gelled material performance that is carbonized
As can be seen from Table 2 with Mg (OH)2The increase of addition, the 3d compression strength and 28d compression strength of test block
Downward trend after first rising is presented, as Mg (OH)2When addition is 3g, intensity of test block highest, 3d compression strength
36.5MPa, 28d compression strength 53.4MPa.
Embodiment 10
Weigh cement 70g, slag 30g, CaCO32g, Na2CO3Or Mg (OH)2Or C2H2O43g, water 30g, are mixed
Uniformly, it is fitted into jolt ramming in 20mm × 20mm × 20mm mould to be molded, maintenance and carbonization mode are same as Example 1.Carbonization knot
Continue to be put into curing box after beam and conserve to 3d and 28d, its mechanical property is tested with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 11
Weigh cement 70g, slag 30g, flyash 2g, Na2CO3Or Mg (OH)2Or C2H2O43g, water 30g, are mixed
Uniformly, it is fitted into jolt ramming in 20mm × 20mm × 20mm mould to be molded, maintenance and carbonization mode are same as Example 1.Carbonization knot
Continue to be put into curing box after beam and conserve to 3d and 28d, its mechanical property is tested with electro-hydraulic servo resistance to compression folding all-in-one.
Embodiment 12
Weigh cement 70g, slag 30g, CaCO32g, flyash 2g, Na2CO3Or Mg (OH)2Or C2H2O42g, water 30g,
It is mixed evenly, is fitted into jolt ramming in 20mm × 20mm × 20mm mould and is molded, maintenance and carbonization mode and the phase of embodiment 1
Together.Carbonization continues to be put into curing box after terminating to be conserved to 3d and 28d, and its mechanical property is tested with electro-hydraulic servo resistance to compression folding all-in-one
Energy.
Claims (10)
1. a kind of slag cement that is carbonized prepares the accelerator of low-carbon binder materials, it is characterised in that the accelerator promotes for mineral
Agent flyash, CaCO3One or both of crystal seed, alkaline accelerator, four kinds of acid accelerator or three kinds；Described alkalescence rush
Enter agent Mg (OH)2Or Na2CO3, acid accelerator be C2H2O4。
2. accelerator according to claim 1, it is characterised in that the accelerator can for mineral accelerator flyash,
CaCO3Crystal seed, alkaline accelerator (Mg (OH)2Or Na2CO3), acid accelerator (C2H2O4) any of four kinds.
3. accelerator according to claim 1, it is characterised in that the accelerator can be mineral accelerator flyash and Mg
(OH)2Or Na2CO3Mixture；Or be mineral accelerator flyash and C2H2O4Mixture.
4. accelerator according to claim 1, it is characterised in that the accelerator can be CaCO3Crystal seed and Mg (OH)2Or
Na2CO3Mixture；Or be CaCO3Crystal seed and C2H2O4Mixture.
5. accelerator according to claim 1, it is characterised in that the accelerator can for mineral accelerator flyash,
CaCO3Crystal seed and Mg (OH)2Or Na2CO3Mixture；Or be mineral accelerator flyash, CaCO3Crystal seed and C2H2O4Mixing
Thing.
6. the application process of the accelerator described in Claims 1 to 5, it is characterised in that in slag-cementitious material
The carburizing reagent added in accelerator promotion binder materials.
7. application process according to claim 6, it is characterised in that slag weight accounts for slag-cement cementitious material gross weight
10~70%.
8. application process according to claim 6, it is characterised in that individually plus a kind of accelerator addition is binder materials
The 1%~5% of gross weight.
9. application process according to claim 6, it is characterised in that flyash or CaCO3Seed charge is binder materials
The 2%~4% of gross weight, acid accelerator or alkaline accelerator addition are the 2%~4% of the amount of slag, and accelerator always adds
Enter amount is no more than slag-cement cementitious material gross weight 6%.
10. application process according to claim 6, it is characterised in that flyash addition is binder materials gross weight
1%~3%, CaCO3Seed charge is the 1%~3% of binder materials gross weight, and acid accelerator or alkaline accelerator are added
Measure as the 2%~4% of binder materials gross weight, the total addition of accelerator is no more than slag-cement cementitious material gross weight
6%.
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| CN107056202B (en) | 2019-11-08 |
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