CN110526644A - Inorganic composite materials and preparation method thereof with low-carbon Steel Properties - Google Patents
Inorganic composite materials and preparation method thereof with low-carbon Steel Properties Download PDFInfo
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- CN110526644A CN110526644A CN201910787100.6A CN201910787100A CN110526644A CN 110526644 A CN110526644 A CN 110526644A CN 201910787100 A CN201910787100 A CN 201910787100A CN 110526644 A CN110526644 A CN 110526644A
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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
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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
- 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
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Abstract
The invention discloses a kind of inorganic composite materials and preparation method thereof with low-carbon Steel Properties.The inorganic composite materials include 100 parts of cement, 30~40 parts of silicon ash, 55~65 parts of flyash, 90~110 parts of quartz sand, 2~4 parts of water-reducing agent, 22~24 parts of water, short steel fibre volume addition content 1~3% according to parts by weight, 12~20mm long steel fibre volume addition content 3~8%, after mortar vibration is at mould, demoulding conserves 1~3 day in 20~90 DEG C of water-baths of temperature, 200 DEG C of saturated vapor maintenances 12~obtain inorganic composite materials for 24 hours.Inorganic composite materials of the invention have and high intensity similar in low-carbon yield strength, high tenacity, also have the characteristics that corrosion resistance, the coefficient of heat conduction that mild steel do not have be low and solenoid isolation, there is good fire resistance simultaneously, intensity maintains 85% or more under the conditions of 400 DEG C, the defect that carbon steel material fire resistance difference can effectively be made up can be widely applied to replace the fields such as the precast construction field of mild steel, armor facing penertration resistance engineering field, Nuclear Power Plant Project.
Description
Technical field
The present invention relates to a kind of inorganic composite materials and preparation method thereof with low-carbon Steel Properties, belong to concrete material
Technical field.
Background technique
Mild steel has the characteristics that 235~345MPa proof strength and high moulding and toughness, in structural steelwork
It is widely used and develops.But steel are particularly in corrosive media in wet environment and are easy corrosion, serious shadow
Ring its durability used.And steel structure fire-resistant performance is poor, and as the temperature rises, intensity declines, intensity within 250 DEG C
It varies less, after 300 DEG C, intensity is gradually reduced, and intensity falls to zero when reaching 450~650 DEG C.It is, thus, sought for
A kind of new material, not only with the high intensity and high tenacity of low-carbon steel construction, but also the corrosion resistance not having with low-carbon steel construction
And fire resistance.
The corrosion resistance of ordinary low-carbon steel is poor, generally requires by surface zinc-plated processing, surface spraying antirust resin etc.
Measure carries out corrosion resistant protection.These process for protecting surface extend with low-carbon steel member active time, and sealer is gradually rotten
Erosion and peeling, maintenance and maintenance cost are high.The anti-collision guard rail for highways of ordinary low-carbon steel production, high-speed rail sound barrier channel-section steel dragon
Bone, the plug-in marble lightgage steel joist of building, the light steel roof truss of Public Parking, building sculpture for city steel construction etc. are in the natural environment
Sunshine drench with rain, drying and watering cycle make ordinary low-carbon steel corrosion resistant aggravate, bring security risk.
Reactive powder (RPC) material has the characteristics that high-durability, corrosion resistance, fire resistance, but existing using active
The RPC material of mineral admixture (such as silicon ash, silica flour) preparation is mostly using natural curing or dry heating curing, this leads to it
The activity of internal mineral spike fails to be fully played, and compression strength substantially can only achieve 170-230Mpa, bending strength
Substantially 30-60MPa (build by An Mingzhe, Wang Qingsheng, the preparation principle and application prospect [J] of Ding Jiantong Reactive Powder Concrete
Build technology, 2001,32 (1): 15-16.), performance indexes fails the level for reaching mild steel.
Summary of the invention
The object of the present invention is to provide one kind to have compression strength > 300MPa, and flexural strength is low close to having for 100MPa
The inorganic composite materials and preparation method thereof of carbon steel performance.
Realizing the technical solution of the object of the invention is:
Inorganic composite materials with low-carbon Steel Properties, include: 100 parts of cement according to parts by weight, and 30~40 parts of silicon ash,
90~110 parts of quartz sand, 55~65 parts of flyash, 2~4 parts of water-reducing agent, 22~24 parts of mixing water, volume fraction is 3%~8%
Long steel fibre and volume fraction be 1%~3% short steel fibre, the cement, silicon ash and flyash forms cementitious material,
The calcium silicon ratio of the cementitious material is 0.65~0.75.
Heretofore described cement is No. 52.5 ordinary portland cements.
Heretofore described silicon ash be imperfect crystal formation shape particle, be in canescence, dioxide-containing silica be 90wt%~
95wt%.
Heretofore described flyash is I grades of grey D50<8 μm, specific surface area>0.70m2/ g, dioxide-containing silica are
40wt%~60wt%.
Heretofore described quartz sand is that particle size range is 16 mesh~100 mesh.
Heretofore described mixing water is mixture of ice and water, and the temperature of mixing water is 0 DEG C.
Heretofore described water-reducing agent is polycarboxylic acid series high efficiency water reducing agent.
The diameter of heretofore described short steel fibre is 20~40 μm, and length is 1000~1500 μm.
The tensile strength of heretofore described long steel fibre be greater than 2000MPa, diameter 0.2mm, length be 12~
20mm。
The preparation method of the above-mentioned inorganic composite materials with low-carbon Steel Properties, the specific steps are as follows:
Step 1, silicon ash, quartz sand and flyash are uniformly mixed in proportion, the stirring of 30% ice water, which is added, makes mineral
Material surface wetting, adds cement, remaining ice water and water-reducing agent, and stirring is eventually adding steel fibre, stirs to slurry is formed
To mortar；
Step 2, mortar is put into mold, vibration moulding, covers preservative film, is placed in 20 ± 2 DEG C of care environments and stands,
Demoulding；
Step 3, demoulding sample is placed in 50~90 DEG C of water, is carried out water-bath and is conserved 1~3 day；
Step 4, the sample after water-bath being conserved is placed in 200 ± 2 DEG C of saturated vapors pressure maintenance 12~for 24 hours, natural cooling
To room temperature, the inorganic composite materials with low-carbon Steel Properties are obtained.
Preferably, in step 1, the silicon ash, quartz sand and flyash are stirred the time as 2~3min, are added
The time of 30% ice water stirring is 2~3min, and the mixing time after steel fibre is added is 1~2min.
Preferably, in step 2, the time of vibration is 3~6min, for 24 hours demoulding later.
Compared with prior art, the invention has the following advantages that
(1) pozzolanic activity of flyash is given full play to as primary raw material using flyash, reduces preparation cost, together
The recycling of Shi Shixian flyash comprehensively utilizes.
(2) present invention control calcium silicon ratio is 0.65~0.75, advantageously forms single alkali hydrated calcium silicate, single buck SiClx acid
For calcium phase for double alkali hydrated calcium silicates, compression strength is higher, to enhance the intensity of inorganic composite article.
(3) length steel fibre composite toughening effect is utilized, the mechanical property of the inorganic composite materials is promoted.The short steel of 1-2mm
Fiber not only can block the occurrence and development of intrinsic silicon micro-crack but also can serve as the effect of superpower aggregate, promote inorganic composite materials
Elasticity modulus；12-20mm long steel fibre has anchorage effect, constrains the cracking of matrix, the toughness and structure for promoting matrix are prolonged
Property.
(4) use 0 DEG C of ice water, absorb hydrated cementitious when releasing heat, promoted cement mortar mobility.
In summary, the compression strength of inorganic composite materials of the invention can reach 300~400MPa, bending strength 80
~110MPa, bending deflection reach 1.25mm (see Fig. 1 bending load and neutral displacement), have significant plasticity, intensity is
Reach low-carbon Steel Properties, suitable for preparing anti-collision guard rail for highways, both there is high intensity, high impact toughness, and have good
Durability, while inorganic composite materials of the invention are when being impacted, since elasticity modulus is low compared with carbon steel, stress when impact
Time is longer, and buffering effect more preferably, mitigates the harm that traffic accident is formed.
Detailed description of the invention
Fig. 1 is inorganic composite materials three point bending specimen load and change in displacement tendency chart, 40 х of sample dimensions, 40 х
160mm；Test condition, span 100mm；Maximum deflection load 43.3KN；Bending strength 101.5MPa.
Fig. 2 is the shape appearance figure of the short steel fibre of 1~2mm of length.
Fig. 3 is the shape appearance figure of 12~20mm of length steel fibre.
Fig. 4 is the preparation flow figure of inorganic composite materials.
Specific embodiment
Compared with existing, the creativeness of technical solution of the present invention is:
(1) volcano ash effect of flyash, micro aggregate effect and inorganic to be promoted with the over-superimposed effect of silicon ash are utilized
The mechanical property of composite material.Due to the unique mineral grain feature of flyash, it is greatly improved under high efficiency water reducing agent effect
Slurry fluidity." micro aggregate effect " of flyash is prevented since independent fly ash grain enters in cement granules gap
Sealing mud bonding, is conducive to hydration reaction, enhances the progress of the compactness aquation of inorganic composite materials.Also contain in flyash
Active SiO2And A12O3Once its activity is excited, secondary hydration occurs for the calcium hydroxide (CH) that can be generated with hydrated cementitious
Reaction had not only consumed CH content, but also generated the C~S~H gel with gelling, improved matrix strength.Flyash is matched with silicon ash
Close the super-additive effect generated when using, SiO in silicon ash2It can react, be conducive to the CH generated when early hydration in cement
The growth of inorganic composite materials early strength, and flyash is primarily involved in the cement in later period since its secondary reaction of hydration is slower
Secondary reaction of hydration, this is advantageous for the growth of the later strength of powder activity inorganic composite materials.
Tricalcium silicate (C in ordinary portland cement3S) with dicalcium silicate (C2S 75% or more gross weight) is accounted for, in hydrated cementitious
When formed CSH gel and calcium hydroxide, reaction equation it is as follows:
3CaO·SiO2+nH2O→CaO·xSiO2·yH2O+nCa(OH)2 (1)
2CaO·SiO2+mH2O→CaO·xSiO2·yH2O+mCa(OH)2 (2)
With the progress of hydration reaction, calcium hydroxide (CH) is continuously generated, and the release of simultaneous heat makes aqueous solution
In alkaline ring mirror, the silicon ash particle for being exposed to aqueous solution starts to generate CSH gel phase with the CH reaction in aqueous solution, and reaction is such as
Under:
Ca+2+2yOH-1+xSiO2 -2→CaO·xSiO2·yH2O(CSH gel) (3)
This plays very big effect to the improvement of inorganic composite materials early strength.200 DEG C are being carried out later, 1.55MPa
When saturated atmosphere presses steam curing, steam press maintenance promotes material secondary hydration reaction, improves the microcrystalline texture inside product.In
In high-temperature water thermal medium, due to SiO2Migration velocity is different in the solution from CaO solution rate and product, therefore steam press maintenance
When, hydrated calcium silicate at first sand grain surface generate, then expand to the space between sand grains, with aquation crystallize development,
They are gradually connected, and form crystallization intergrowth, and sand grains is cementing, are formed fine and close space structure, are improved inorganic compounding material
The intensity of material products.
The present invention utilizes Al in flyash2O3With SiO2The sial vitreum of formation, under autoclaved condition formed CaO~
Al2O3~SiO2~H2O system generates multi mineral gum material under high temperature hydration reaction, ultimately forms crystallite the finest and close
Structure.From crystal microscopic structure, certain simple hyrate can not obtain highest intensity, polynary mineral microcrystal group
At inorganic composite materials be only optimal microcrystalline texture.Utilize the active Al in flyash2O3, in 200 DEG C of saturated vapour pressures
Under, it is easy to form that there is huge crystallizing power mirabilitum crystallina pomegranate stone (C3ASnH6-2n) intensity increases after carbonization or drying and watering cycle
Add, the disadvantage of strength reduction deficiency after single buck compound carbonization can not only be made up, moreover it is possible to the frost resistance of product is promoted, to increase
Add the durability of product.
(2) expansion of steel fibre constraint inorganic composite materials matrix is produced from stress constraint enhancing.
Inorganic composite materials are generated by natural curing with CSH gel as main hydrated product, the shape in steam press maintenance
It is mutually main hydrated product at tobermorite.A large number of studies show that CSH gel density is 2.60-2.86 (being shown in Table 1)
(Jeffrey J.Thomas,Hamlin M.Jennings,and Andrew J.Allen.Relationships between
Composition and Density of Tobermorite, Jennite, and NanoscalCaO~SiO2~H2O[J]
.J.Phys.Chem.C 2010,114:7594-7601), the CSH gel and calcium hydroxide (CH) silicon ash that hydrated cementitious is formed are anti-
The CSH gel that should be formed forms tobermorite under the conditions of steam press maintenance, and reaction equation is as follows:
CSH gel+Ca+2+OH-1+SiO2 -2→5CaO·6SiO2·5H2O (4)
Since CSH gel density is greater than tobermorite phase, steam pressure stage CSH gel changes tobermorite by high density
Cause volume to increase to low-density conversion, generates expansion.Expansion is constrained, restraint of liberty expansion will generate restraint stress.
The microdilatancy that the present invention inhibits internal cementitious material to generate when changing using large dosage steel fibre, thus in inorganic composite materials
Portion forms seif-citing rate, promotes the mechanical property of inorganic composite materials.
1 C of table~S~H phase density data
The intensity of the type inorganic composite materials is mainly by hydrated reaction of cement, silicon ash, volcanic ash activity of coal ash etc.
It is generated under collective effect.Wherein silicon ash has good pozzolanic activity at normal temperature, carries out 20~90 DEG C in sample and bathes the phase of supporting
Between, silicon ash participates in secondary reaction of hydration, this makes product early stage just have very high intensity, this can effectively inhibit inorganic compounding material
Expect the expansion or shrinkage of early stage.Sample is passing through 200 DEG C, when the saturated vapour pressure of 1.55MPa conserves, each component that gives full play to
The pozzolanic activity of mineral material, the CSH gel that aquation is formed.Ca in solution under hydrothermal condition+2、Si+4、OH-1Plasma
Concentration reaches supersaturation and Tobermorite crystal is precipitated；This high density (2.60g/cm3), the CSH gel of high calcium silicon ratio it is opposite
Low-density (2.48g/cm3), the transformation of the tobermorite (TOB) of low calcium silicon ratio when, sample generates volume microdilatancy.In low glue
Than in the case of, since the CSH gel after hot bath conserves just has very high intensity, the growth of tobermorite (TOB)
Just by the constraint of crystalline spaces, the inorganic composite materials compact structure is eventually led to, gross imperfection is few, and most probable pore size distribution is small
In 10nm.
(3) short steel fibre cooperates with composite toughening to enhance mechanism inorganic composite materials matrix with long steel fibre.Select length
The short steel fibre of respectively 1~2mm (0.05~0.1mm of diameter) and 12~20mm copper facing steel fibre (diameter 0.2mm) are as enhancing
Phase is shown in Fig. 2,3.
Long and short steel fibre adds collaboration activeness and quietness tool, and there are three types of functions: 1. short length of steel fiber is being mixed in 1~2mm
It is easier to be evenly distributed in inorganic composite materials matrix in material whipping process.In the condition of same steel fiber volume addition content
Under, short steel fibre is several to be multiplied, the effective extension for hindering microcrack inside inorganic composite materials and retardance macrocrack
Occurrence and development, improve the breaking resistance of matrix, while the stress of crack tip can also be made to concentrate and relaxed；2. short steel
Fiber doping is evenly distributed on the aggregate in inorganic composite materials matrix as high elastic modulus, and inorganic composite materials can be improved
Elasticity modulus；3. adding 12~20mm steel fibre improves the toughness of inorganic composite materials and the ductility of structure.Steel fibre is in nothing
The failure mode of machine composite material is that steel fibre is extracted, and steam pressure process generates CSH gel and generates body to tobermorite phase transition
Product expansion, matrix expansion have squeezing action to steel fibre, increase the anchoring of steel fibre and matrix, while steel fibre is to inorganic
Composite material expansion constraint generates seif-citing rate, and steel fibre constrains matrix the cracking for inhibiting matrix.Therefore, short steel fibre is in matrix
Inside is uniformly distributed the blocking of On Crack Propagation, and both matrix expansion and the constraint of steel fibre compound action promote inorganic compounding material
The mechanical property of material.
(4) inorganic composite materials System Design advantageously forms single alkali hydrated calcium silicate compared with low calcium silicon ratio.Single buck SiClx
For sour calcium phase for double alkali hydrated calcium silicates, compression strength is higher, to enhance the intensity of inorganic composite article.Single buck
The crystal scale for changing calcium silicates is smaller, large specific surface area, and the crystallization intergrowth thus generated has many contact points, thus strong
Degree is high, and the intergrowth as composed by double alkali hydrated calcium silicate coarse crystal, the relatively single alkali hydrated calcium silicate of contact point quantity
Greatly reduce, so the product strength formed is relatively low.
(5) hydration heat of cement is high, and it is the main reason for reducing cement mortar mobility that exothermic reaction, which accelerates hydrated cementitious,.
Using mixture of ice and water, it is added 0 DEG C and mixes and stirs the hydration rate that hydrated cementitious early stage is effectively reduced in water energy, absorb hydrated cementitious heat release
Amount, improves cement mortar fluidity.
Embodiment 1
Raw material forms in this embodiment are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.3:0.62:
0.03:0.24:1.1, calcium silicon ratio are 0.75, and long steel fibre volume ratio is 7%, short steel fibre 1%.
The first step, by 671.5g quartz sand, 183.2g silicon ash and 378.5g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 44.0g ice water is added and soaks mineral material, stirs 2~3min.It will be remaining
102.6g ice water is uniformly mixed with 18.3g water-reducing agent, 610.5g cement and remaining ice water is successively placed in agitated kettle, stirring is mixed
6~10min of object is closed, after forming slurry to material, long steel fibre 420g and short steel fibre 60g is added, stirs 1~2min, until
Steel fibre be uniformly distributed in cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 80 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial compression strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenances 24
When, then cooled to room temperature, obtains the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) Mechanics Performance Testing is carried out, the compression strength of inorganic composite materials obtained is 390.0MPa, and flexural strength is
103.4MPa, for the inorganic composite materials with low-carbon Steel Properties.
Embodiment 2
Raw material forms in this embodiment are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.35:0.60:
0.04:0.23:1.0, calcium silicon are 0.72 than control, and long steel fibre volume ratio is 4%, short steel fibre 2%.
630g quartz sand, 220.5g silicon ash and 378g flyash are put into 2~3min of stirring in blender by the first step, to
Mixture stirs evenly, and (30%) 43.5g ice water is added and soaks mineral material, stirs 2~3min.By remaining 101.4g ice water with
25.2g water-reducing agent is uniformly mixed, and 630g cement and remaining ice water is successively placed in 6~10min of stirring in agitated kettle, to material shape
After slurry, long steel fibre 240g, short steel fibre 120g is added, 1~2min is stirred, until steel fibre is uniformly distributed and cement bonded sand
In slurry.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 1 day, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial compression strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenances 18
When, then cooled to room temperature, obtains the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 326.8MPa of inorganic composite materials obtained, flexural strength 87.2MPa,
For the inorganic composite materials with low-carbon Steel Properties.
Embodiment 3
Raw material forms in this embodiment are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.3:0.62:
0.03:0.24:1.1, calcium silicon are 0.75 than control, and long steel fibre volume ratio is 5%, short steel fibre 2%.
The first step, by 671.5g quartz sand, 183.2g silicon ash and 378.5g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 44.0g ice water is added and soaks mineral material, stirs 2~3min.It will be remaining
102.6g ice water is uniformly mixed with 18.3g water-reducing agent, by 610.5g cement and remaining ice water be successively placed in stirring 6 in agitated kettle~
10min after forming slurry to material, is added long steel fibre 300g, short steel fibre 120g, 1~2min is stirred, until steel fibre is equal
In even distribution and cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 50 DEG C of water and conserve 3 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial compression strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenances 18
When, then cooled to room temperature, obtains the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 355.6MPa of inorganic composite materials obtained, flexural strength 93.7MPa,
For the inorganic composite materials with low-carbon Steel Properties.
Embodiment 4
Raw material forms in this embodiment are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.55:
0.04:0.24:0.9, calcium silicon are 0.73 than control, and long steel fibre volume ratio is 8%, short steel fibre 1%.
594g quartz sand, 264g silicon ash and 363g flyash are put into 2~3min of stirring in blender, to mixed by the first step
It closes object to stir evenly, (30%) 47.5g ice water is added and soaks mineral material, stirs 2~3min.By remaining 110.8g ice water with
26.4g water-reducing agent is uniformly mixed, and 660g cement and remaining ice water is successively placed in 6~10min of stirring in agitated kettle, to material shape
After slurry, long steel fibre 480g, short steel fibre 60g is added, 1~2min is stirred, until steel fibre is uniformly distributed and cement bonded sand
In slurry.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 3 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small for 24 hours in 200 DEG C of saturated vapor pressure maintenances
When, then cooled to room temperature, obtains the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) Mechanics Performance Testing, the compression strength 407.5MPa of inorganic composite materials obtained are carried out, flexural strength is
108.5MPa, for the inorganic composite materials with low-carbon Steel Properties.
Embodiment 5
Raw material forms in this embodiment are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.65:
0.03:0.23:1.1, calcium silicon are 0.68 than control, and long steel fibre volume ratio is 3%, short steel fibre 3%.
The first step, by 671.6g quartz sand, 244.2g silicon ash and 396.8g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 42.1g ice water is added and soaks mineral material, stirs 2~3min.By remaining 98.3g
Ice water is uniformly mixed with 18.3g water-reducing agent, and 610.5g cement and remaining ice water are successively placed in 6~10min of stirring in agitated kettle,
After forming slurry to material, long steel fibre 180g, short steel fibre 180g is added, 1~2min is stirred, until steel fibre is uniformly distributed
In cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 335.5MPa of inorganic composite materials obtained, flexural strength 80.4MPa,
For the inorganic composite materials with low-carbon Steel Properties.
2 embodiment data summarization of table
* note: steel fibre addition content is volume addition content.
Below on the basis of embodiment 5,6 groups of comparative examples are separately designed, is that short length of steel fiber is too long, only adds short steel fine
Dimension, lengthening steel fibre, calcium silicon compare explanation than excessively high and use room temperature (30 DEG C) mixing water than too low, calcium silicon.
Comparative example 1: short length of steel fiber is too long.
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.65:
0.03:0.24:1.1, calcium silicon are 0.68 than control, and long steel fibre volume ratio is the short steel fibre 3% of 3%, 5mm.
The first step, by 671.6g quartz sand, 244.2g silicon ash and 396.8g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 44.0g ice water is added and soaks mineral material, stirs 2~3min.It will be remaining
102.6g ice water is uniformly mixed with 18.3g water-reducing agent, by 610.5g cement and remaining ice water be successively placed in stirring 6 in agitated kettle~
10min after forming slurry to material, is added the short steel fibre 180g of copper facing long steel fibre 180g, 5mm, stirs 1~2min, until
Steel fibre be uniformly distributed in cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains toughening inorganic composite materials.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 205.3MPa of inorganic composite materials obtained, flexural strength 49.3MPa,
Without low-carbon Steel Properties.
Comparative example 2: only add short steel fibre
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.65:
0.03:0.23:1.2, calcium silicon are 0.68 than control, the short steel fibre 3% of 1~1.5mm.
The first step, by 732.6g quartz sand, 244.2g silicon ash and 396.8g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 42.1g ice water is added and soaks mineral material, stirs 2~3min.By remaining 98.3g
Ice water is uniformly mixed with 18.3g water-reducing agent, and 610.5g cement and remaining ice water are successively placed in 6~10min of stirring in agitated kettle,
After forming slurry to material, the short steel fibre 180g of 1~1.5mm is added, 1~2min is stirred, until steel fibre is uniformly distributed and water
In cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains inorganic composite materials.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 218.4MPa of inorganic composite materials obtained, flexural strength 32.5MPa,
Without low-carbon Steel Properties.
Comparative example 3: lengthening steel fibre
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.65:
0.04:0.24:1.5, calcium silicon are 0.68 than control, and long steel fibre volume ratio is 3%.
The first step, by 786.7g quartz sand, 209.1g silicon ash and 340.9g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 37.8g ice water is added and soaks mineral material, stirs 2~3min.By remaining 88.1g
Ice water is uniformly mixed with 21.0g water-reducing agent, and 524.5g cement and remaining ice water are successively placed in 6~10min of stirring in agitated kettle,
After forming slurry to material, be added long steel fibre 180g, stir 1~2min, until steel fibre be uniformly distributed in cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains inorganic composite materials.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 200.9MPa of inorganic composite materials obtained, flexural strength 65.4MPa,
Without low-carbon Steel Properties.
Comparative example 4: calcium silicon is than too low
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0:2.0:0.04:
0.26:1.5, calcium silicon are 0.53 than control, and long steel fibre volume ratio is 3%, the short steel fibre 3% of 1~1.5mm.
620.7g quartz sand and 827.6g flyash are put into 2~3min of stirring, object to be mixed in blender and stirred by the first step
It mixes uniformly, (30%) 32.3g ice water is added and soaks mineral material, stirs 2~3min.By remaining 75.3g ice water and 16.6g diminishing
Agent is uniformly mixed, and 413.7g cement and remaining ice water are successively placed in 6~10min of stirring in agitated kettle, form slurry to material
Later, the short steel fibre 180g of long steel fibre 180g, 1~1.5mm is added, 1~2min is stirred, until steel fibre is uniformly distributed and cement
In mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains inorganic composite materials.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 148.8MPa of inorganic composite materials obtained, flexural strength 35.4MPa,
Without low-carbon Steel Properties.
Comparative example 5: calcium silicon is than excessively high
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.20:0.20:
0.03:0.23:0.7, calcium silicon are 1.28 than control, and long steel fibre volume ratio is 3%, the short steel fibre 3% of 1~1.5mm.
The first step, by 611.9g quartz sand, 174.8g silicon ash and 174.8g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 60.3g ice water is added and soaks mineral material, stirs 2~3min.It will be remaining
140.7g ice water is uniformly mixed with 26.2g water-reducing agent, by 874.1g cement and remaining ice water be successively placed in stirring 6 in agitated kettle~
10min after forming slurry to material, is added the short steel fibre 180g of long steel fibre 180g, 1~1.5mm, stirs 1~2min, until
Steel fibre be uniformly distributed in cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, obtains inorganic composite materials.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) progress Mechanics Performance Testing, the compression strength 204.1MPa of inorganic composite materials obtained, flexural strength 42.8MPa,
Without low-carbon Steel Properties.
Comparative example 6: normal-temperature water
Raw material forms in this comparative example are as follows: cement: silicon ash: flyash: water-reducing agent: water: quartz sand=1:0.40:0.65:
0.03:0.20:1.1, calcium silicon are 0.68 than control, and long steel fibre volume ratio is 3%, the short steel fibre 3% of 1~1.5mm, water 30
DEG C normal-temperature water.
The first step, by 671.6g quartz sand, 244.2g silicon ash and 396.8g flyash be put into blender stirring 2~
3min, object to be mixed stir evenly, and (30%) 36.6g water is added and soaks mineral material, stirs 2~3min.By remaining 85.5g water
It is uniformly mixed with 18.3g water-reducing agent, 610.5g cement and remaining ice water is successively placed in 6~10min of stirring in agitated kettle, to material
Material is formed after slurry, and the short steel fibre 180g of long steel fibre 180g, 1~1.5mm is added, and 1~2min is stirred, until steel fibre is uniform
In distribution and cement mortar.
The composite mortar of the first step is put into the three gang moulds tool of 40*40*160mm, takes the side of vibration moulding by second step
Method vibrates 3~6min, it is ensured that slurry is uniformly spread out and formed in a mold, and surface strikes off, and preservative film in covering is placed on 20
± 2 DEG C of care environments are quiet to stop, and demoulds after 24 hours.
Inorganic composite materials made of second step are put into 90 DEG C of water and conserve 2 days, part occurs during this period by third step
Calcium oxide and silica pre-reaction generate hydrated calcium silicate and sample are made to have good initial strength.
4th step, the sample after water-bath is conserved are sent into still kettle, small in 200 DEG C of saturated vapor pressure maintenance 12h
When, then cooled to room temperature, can be obtained the steel fibre toughening inorganic composite materials with low-carbon Steel Properties.
5th step, by inorganic composite materials according to " Test method for strength of hydraulic cement mortar method (ISO method) " (GB/T17671~
1999) Mechanics Performance Testing, the compression strength 217.3MPa of inorganic composite materials obtained, flexural strength 44.2MPa are carried out.
Coolant-temperature gage is higher, and hydrated cementitious fast speed causes slurry side in becoming whipping process to condense since room temperature mixes and stirs for the proportion；In
Since mobility is bad when pouring, it is easy to cause product properties bad in inside formation hole, therefore do not have low-carbon Steel Properties.
Claims (10)
1. the inorganic composite materials with low-carbon Steel Properties, which is characterized in that it according to parts by weight include: 100 parts of cement, silicon ash
30~40 parts, 90~110 parts of quartz sand, 55~65 parts of flyash, 2~4 parts of water-reducing agent, 22~24 parts of mixing water, volume fraction
The short steel fibre that long steel fibre and volume fraction for 3%~8% are 1%~3%, the cement, silicon ash and flyash group
At cementitious material, the calcium silicon ratio of the cementitious material is 0.65~0.75.
2. inorganic composite materials according to claim 1, which is characterized in that the cement is No. 52.5 silicate cements
Mud.
3. inorganic composite materials according to claim 1, which is characterized in that the silicon ash is imperfect crystal formation shape
Grain, dioxide-containing silica are 90wt%~95wt%.
4. inorganic composite materials according to claim 1, which is characterized in that the flyash is I grades of grey D50 < 8 μm,
Specific surface area > 0.70m2/ g, dioxide-containing silica are 40wt%~60wt%.
5. inorganic composite materials according to claim 1, which is characterized in that the quartz sand is that particle size range is 16 mesh
~100 mesh；The mixing water is mixture of ice and water, and the temperature of mixing water is 0 DEG C.
6. inorganic composite materials according to claim 1, which is characterized in that the water-reducing agent subtracts for polycarboxylic acids high efficiency
Aqua.
7. inorganic composite materials according to claim 1, which is characterized in that the diameter of the short steel fibre is 20~40
μm, length is 1000~1500 μm；The tensile strength of the long steel fibre is greater than 2000MPa, diameter 0.2mm, and length is
12~20mm.
8. the preparation method of any inorganic composite materials with low-carbon Steel Properties according to claim 1~7, feature
It is, the specific steps are as follows:
Step 1, silicon ash, quartz sand and flyash are uniformly mixed in proportion, the stirring of 30% ice water, which is added, makes mineral material
Moistened surface, adds cement, remaining ice water and water-reducing agent, and stirring is eventually adding steel fibre, stirs to get sand to slurry is formed
Slurry；
Step 2, mortar is put into mold, vibration moulding, covers preservative film, is placed in 20 ± 2 DEG C of care environments and stands, taken off
Mould；
Step 3, demoulding sample is placed in 50~90 DEG C of water, is carried out water-bath and is conserved 1~3 day；
Step 4, the sample after water-bath being conserved is placed in 200 ± 2 DEG C of saturated vapors pressure maintenance 12~for 24 hours, naturally cools to room
Temperature obtains the inorganic composite materials with low-carbon Steel Properties.
9. preparation method according to claim 8, which is characterized in that in step 1, the silicon ash, quartz sand and fine coal
Ash be stirred the time be 2~3min, be added 30% ice water stirring time be 2~3min, be added steel fibre after stirring when
Between be 1~2min.
10. preparation method according to claim 8, which is characterized in that in step 2, the time of vibration be 3~
6min, for 24 hours demoulding later.
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| CN113386246A (en) * | 2021-06-25 | 2021-09-14 | 洛阳理工学院 | Preparation and forming process of high-strength and high-durability cement-based material |
| CN114407568A (en) * | 2021-12-31 | 2022-04-29 | 上海卓欧建筑(集团)有限公司 | Manufacturing process of relief wall without holes |
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