CN110436954A - A kind of preparation method of autoclave aerated concrete building block - Google Patents
A kind of preparation method of autoclave aerated concrete building block Download PDFInfo
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- CN110436954A CN110436954A CN201910680692.1A CN201910680692A CN110436954A CN 110436954 A CN110436954 A CN 110436954A CN 201910680692 A CN201910680692 A CN 201910680692A CN 110436954 A CN110436954 A CN 110436954A
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- Prior art keywords
- raw material
- steel slag
- building block
- preparation
- mixing
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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
- 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
- C04B28/14—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 calcium sulfate 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
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of preparation methods of autoclave aerated concrete building block, the described method includes: by steel slag: fine sand: cement: lime: the mass ratio of gypsum=(30~50): (30~50): (0~18): (0~18): 2 weigh raw material, it is uniform that raw material is placed in stirrer for mixing, obtains mixing；Wherein, the quality sum of steel slag and fine sand accounts for the 80% of total mass of raw material, and the quality sum of cement and lime accounts for the 18% of total mass of raw material；Aluminum powder solution is configured, water is added into mixing by ratio of water to material=0.6, after mixing evenly, then adds aluminum powder solution thereto, continue to stir, obtain slurry；Slurry is poured into mold, be placed in it is quiet in 70 DEG C of curing boxes stop maintenance for 24 hours, saw goes to overflow the part of mold, be put into after demoulding in steam pressure reaction kettle steam pressure 8h to get.This method has positive effect using steel slag as admixture, to the reasonable utilization and energy-saving and emission-reduction of steel slag, and the preparation process is simple, at low cost, potential remarkable in economical benefits.
Description
Technical field
The invention belongs to construction material fields, and in particular to a kind of preparation method of autoclave aerated concrete building block.
Background technique
The rapid development of steel industry while bringing great economic benefit, also brings a series of environmental problem.Its
The discharge amount of middle steel slag is growing, but cannot effectively be handled, and it is about 1.5 hundred million tons of left sides that steel slag amount is discharged in the whole world every year
The right side, a lot of steel slag stockpiling not only occupy tract but also have aggravated the pollution of environment.It is low for picture this activity of steel slag, heap
The big material of accumulated amount, it is current to utilize only 10% or so.In recent years, steam-pressing aero-concrete becomes the novel building material widelyd popularize
Material is used as materials for wall mainly due to its light porous characteristic, with splendid insulation and reduces building energy
The performances such as consumption.The most solids waste materials most for steam-pressing aero-concrete of current research are flyash and slag,
And C in steel slag3S、C2S、C4AF and C2F etc. has the characteristics that the mineralogical composition of certain gelation activity and steel slag stability are poor, makes
Steel slag is obtained in the existing application value of the field of building materials, and has certain defect, the present invention will use steel slag to mix as steam pressurized
Solidifying soil raw material, solve its application problem to a certain extent, reduce the undesirable harm of stability.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of preparation methods of autoclave aerated concrete building block, to steel
The reasonable of slag has positive effect using with energy-saving and emission-reduction.
The present invention is achieved by the following technical solutions:
A kind of preparation method of autoclave aerated concrete building block, comprising the following steps:
Step 1) presses steel slag: fine sand: cement: lime: the mass ratio of gypsum=(30~50): (30~50): (0~18):
(0~18): 2 weigh raw material, and it is uniform that raw material is placed in stirrer for mixing, obtain mixing；Wherein, the quality of steel slag and fine sand it
With account for the 80% of total mass of raw material, the quality sum of cement and lime accounts for the 18% of total mass of raw material；
Step 2) configures aluminum powder solution, adds water into the mixing that step 1) obtains by ratio of water to material=0.6, stirs evenly
Afterwards, then thereto aluminum powder solution is added, continues to stir, obtains slurry；
The slurry that step 3) obtains step 2) pours into mold, be placed in 70 DEG C of curing boxes it is quiet stop maintenance for 24 hours, saw go to overflow
The part of mold out, be put into after demoulding in steam pressure reaction kettle steam pressure 8h to get.
Preferably, partial size≤32 μm of the step 1) steel slag, the fine sand are river sand for building.
Preferably, alkali-activator is also added in step 2) while addition water, the alkali-activator is waterglass, modulus
It is 1.5.
Preferably, the volume of the step 2) aluminium powder is the 0.005~0.008% of total mass of raw material.
Preferably, the specification of the step 3) mold is 70.7mm × 70.7mm × 70.7mm.
Preferably, the reaction condition of the step 3) steam pressure is 2Mpa, 216 DEG C.
Beneficial effects of the present invention are as follows:
(1) for the present invention using steel slag as admixture, suitable steel slag is conducive to improve the intensity of concrete, and the conjunction to steel slag
Reason has positive effect using with energy-saving and emission-reduction.The preparation process is simple, at low cost, potential remarkable in economical benefits.
(2) preparation process of the invention can generate tobermorite by the way of steam pressure with air-entrained concrete building block
(Ca5·Si6O17·5H2O), hydrated calcium silicate (C-S-H) and eakleite (Ca6[Si6O17](OH)2) etc. hydrated products, it is right
Intensity increases, of great advantage.
(3) present invention with the molding steam-pressing aero-concrete of steel slag be used as materials for wall, have splendid insulation with
And reduce the performances such as building energy consumption.
Detailed description of the invention
Fig. 1 is the preparation flow figure of autoclave aerated concrete building block；
Fig. 2 is the XRD spectrum of autoclave aerated concrete building block.
Specific embodiment
The present invention is further elaborated with embodiment with reference to the accompanying drawing.
A kind of preparation method of autoclave aerated concrete building block, as shown in Figure 1, comprising the following steps:
(1) steel slag: fine sand: cement: lime: the mass ratio of gypsum=(30~50): (30~50): (0~18) is pressed: (0~
18): 2 weigh raw material, and it is uniform that raw material is placed in stirrer for mixing, obtain mixing；Wherein, the quality sum of steel slag and fine sand accounts for
The quality sum of the 80% of total mass of raw material, cement and lime accounts for the 18% of total mass of raw material.
Partial size≤32 μm of the steel slag, average grain diameter are 14.89 μm, and the fine sand is river sand for building.
(2) aluminum powder solution is configured, adds water in the mixing obtained by ratio of water to material=0.6 to (1), after mixing evenly, then to
Aluminum powder solution is wherein added, continues to stir, obtains slurry.
Waterglass can be also added while adding water as alkali-activator, waterglass factory modulus used is 3.3, uses NaOH
Its modulus is adjusted to 1.5.
(3) slurry that (2) obtain is poured into 70.7mm × 70.7mm × 70.7mm mold, is placed in 70 DEG C of curing boxes
Quiet to stop maintenance for 24 hours, saw goes to overflow the part of mold, is put into steam pressure reaction kettle after demoulding, and setting autoclaved condition is 2Mpa, 216
DEG C, steam pressure 8h to get.
Embodiment 1
Control cement, lime, gypsum, aluminium powder mass percent are constant, and steel slag and fine sand total amount are total mass of raw material
80%, the aluminium powder of total mass of raw material 0.006% is weighed, water is added to be configured to aluminum powder solution.By such as the following table 1 component weighing.
1 embodiment of table, 1 each component raw material proportioning
By proportion as above, steel slag, fine sand, cement, lime and gypsum are weighed, it is mixed with cement plaster blender
5min is uniformly mixed, then tap water is added thereto, ratio of water to material 0.6, stirs 90s, after mixing, aluminum powder solution is added,
45s is stirred, is poured into 70.7mm × 70.7mm × 70.7mm mold, mold is placed in 70 DEG C of steam curing box and is conserved
For 24 hours, saw go overflow mold part, demoulding, take test block to be put into still kettle and conserve, setting autoclaved condition be 2Mpa, 216 DEG C,
Conserve 8h after take out to get.
Building block made from embodiment 1 is surveyed using GB/T 11969-2008 " steam-pressing aero-concrete method for testing performance "
Measure the compression strength of test specimen.Acquired results are as shown in table 2 below:
2 embodiment of table, 1 performance characterization
Embodiment 2
Control steel slag, fine sand, gypsum, aluminium powder mass percent are constant, and cement and lime total amount are total mass of raw material
18%, the aluminium powder of total mass of raw material 0.006% is weighed, water is added to be configured to aluminum powder solution.By such as the following table 3 component weighing.
3 embodiment of table, 2 each component raw material proportioning
By proportion as above, steel slag, fine sand, cement, lime and gypsum are weighed, it is mixed with cement plaster blender
5min is uniformly mixed, then tap water is added thereto, ratio of water to material 0.6, stirs 90s, after mixing, aluminum powder solution is added,
45s is stirred, is poured into 70.7mm × 70.7mm × 70.7mm mold, mold is placed in 70 DEG C of steam curing box and is conserved
For 24 hours, saw go overflow mold part, demoulding, take test block to be put into still kettle and conserve, setting autoclaved condition be 2Mpa, 216 DEG C,
Conserve 8h after take out to get.
Building block made from embodiment 2 is surveyed using GB/T 11969-2008 " steam-pressing aero-concrete method for testing performance "
Measure the compression strength of test specimen.Acquired results are as shown in table 4 below:
4 embodiment of table, 2 performance characterization
Embodiment 3
It is constant to control steel slag, fine sand, cement, lime, gypsum addition, adjusts the volume of aluminium powder, adds water to be prepared into aluminium powder molten
Liquid.By such as the following table 5 component weighing.
5 embodiment of table, 3 each component raw material proportioning
By proportion as above, steel slag, fine sand, cement, lime and gypsum are weighed, it is mixed with cement plaster blender
5min is uniformly mixed, then tap water is added thereto, ratio of water to material 0.6, stirs 90s, after mixing, aluminum powder solution is added,
45s is stirred, is poured into 70.7mm × 70.7mm × 70.7mm mold, mold is placed in 70 DEG C of steam curing box and is conserved
For 24 hours, saw go overflow mold part, demoulding, take test block to be put into still kettle and conserve, setting autoclaved condition be 2Mpa, 216 DEG C,
Conserve 8h after take out to get.
Building block made from embodiment 3 is surveyed using GB/T 11969-2008 " steam-pressing aero-concrete method for testing performance "
Measure the compression strength of test specimen.Acquired results are as shown in table 6 below:
6 embodiment of table, 3 performance characterization
Embodiment 4
The NaOH of 13.08g is added in the waterglass for taking 100g modulus 3.3, is configured to the waterglass that modulus is 1.5, places
For 24 hours, spare, NaOH used is chemical analysis pure reagent, purity >=96%.By such as the following table 7 component weighing.
7 embodiment of table, 4 each component raw material proportioning
By proportion as above, steel slag, fine sand, cement, lime, gypsum and aluminium powder are weighed, aluminium powder first adds water to be configured to aluminium before
Powder solution.By the starting material with water cement mortar blender mixing 5min in addition to aluminium powder, be uniformly mixed, then be added thereto tap water and
Waterglass, the ratio of mud 0.6 stir 90s, after mixing, aluminum powder solution are added, stir 45s, pour into 70.7mm × 70.7mm
In the mold of × 70.7mm, mold being placed in 70 DEG C of steam curing box and conserved for 24 hours, saw goes to overflow the part of mold, it demoulds,
Take test block to be put into still kettle to conserve, setting autoclaved condition be 2Mpa, 216 DEG C, conserve 8h after take out to get.
Building block made from embodiment 4 is surveyed using GB/T 11969-2008 " steam-pressing aero-concrete method for testing performance "
Measure the compression strength of test specimen.Acquired results are as shown in table 8 below:
8 embodiment of table, 4 performance characterization
Test case 1
X-ray diffraction analysis is carried out to building block made from Examples 1 to 4, XRD spectrum is as shown in Fig. 2, by can be in figure
Find out, building block has eakleite (Ca6[Si6O17](OH)2), tobermorite (Ca5·Si6O17·5H2O), hydrated calcium silicate
(C-S-H) hydrated products such as, therefore there is good compression strength.
Claims (6)
1. a kind of preparation method of autoclave aerated concrete building block, which comprises the following steps:
Step 1) presses steel slag: fine sand: cement: lime: the mass ratio of gypsum=(30~50): (30~50): (0~18): (0~
18): 2 weigh raw material, and it is uniform that raw material is placed in stirrer for mixing, obtain mixing；Wherein, the quality sum of steel slag and fine sand accounts for
The quality sum of the 80% of total mass of raw material, cement and lime accounts for the 18% of total mass of raw material；
Step 2) configures aluminum powder solution, and water is added into the mixing that step 1) obtains by ratio of water to material=0.6, after mixing evenly, then
Aluminum powder solution is added thereto, is continued to stir, is obtained slurry；
The slurry that step 3) obtains step 2) pours into mold, be placed in 70 DEG C of curing boxes it is quiet stop maintenance for 24 hours, saw go overflow mould
The part of tool, be put into after demoulding in steam pressure reaction kettle steam pressure 8h to get.
2. a kind of preparation method of autoclave aerated concrete building block according to claim 1, which is characterized in that step 1) institute
Partial size≤32 μm of steel slag are stated, the fine sand is river sand for building.
3. a kind of preparation method of autoclave aerated concrete building block according to claim 1, which is characterized in that in step 2)
Alkali-activator is also added with while adding water, the alkali-activator is waterglass, modulus 1.5.
4. a kind of preparation method of autoclave aerated concrete building block according to claim 1, which is characterized in that step 2) institute
The volume for stating aluminium powder is the 0.005~0.008% of total mass of raw material.
5. a kind of preparation method of autoclave aerated concrete building block according to claim 1, which is characterized in that step 3) institute
The specification for stating mold is 70.7mm × 70.7mm × 70.7mm.
6. a kind of preparation method of autoclave aerated concrete building block according to claim 1, which is characterized in that step 3) institute
The reaction condition for stating steam pressure is 2Mpa, 216 DEG C.
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| CN201910680692.1A CN110436954A (en) | 2019-07-26 | 2019-07-26 | A kind of preparation method of autoclave aerated concrete building block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807860A (en) * | 2020-07-15 | 2020-10-23 | 湖州巨旺墙体材料有限公司 | High-strength steel slag powder concrete building block suitable for low-temperature environment |
| CN113563104A (en) * | 2021-08-04 | 2021-10-29 | 永兴县恒鑫高科新型环保建材有限公司 | Autoclaved aerated concrete block and preparation method thereof |
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| CN107324844A (en) * | 2017-05-18 | 2017-11-07 | 商洛学院 | A kind of method of the clay standby air-entrained concrete building block of steel scoria magnetic separation tail |
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| CN1597606A (en) * | 2004-08-09 | 2005-03-23 | 丁立平 | Air entraining concrete material manufactured by sand |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111807860A (en) * | 2020-07-15 | 2020-10-23 | 湖州巨旺墙体材料有限公司 | High-strength steel slag powder concrete building block suitable for low-temperature environment |
| CN113563104A (en) * | 2021-08-04 | 2021-10-29 | 永兴县恒鑫高科新型环保建材有限公司 | Autoclaved aerated concrete block and preparation method thereof |
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