CN105712642B - A kind of cement concrete efficient expansion clinker, its preparation method and its application - Google Patents
A kind of cement concrete efficient expansion clinker, its preparation method and its application Download PDFInfo
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- CN105712642B CN105712642B CN201610023956.2A CN201610023956A CN105712642B CN 105712642 B CN105712642 B CN 105712642B CN 201610023956 A CN201610023956 A CN 201610023956A CN 105712642 B CN105712642 B CN 105712642B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The present invention relates to a kind of cement concrete efficient expansion clinker, its preparation method and its application.Expansive clinker of the present invention includes following components and each component mass percent is：f‑CaO：30 ~ 60wt%, Fe2O3：5 ~ 40wt%, C2S：3 ~ 10wt%, C4AF：2 ~ 10wt%, SiO2：3 ~ 15wt%, Fe：3 ~ 12wt%, C4A3S：1~8wt%.The preparation method of the expansive clinker includes that obtained raw material will be well mixed after 60 ~ 80wt% lime stone, 15 ~ 30wt% pyrite cinders and 5 ~ 10wt% rice hull ash pulverizing and jevigatings；Raw material are placed in into 1100 ~ 1350 DEG C of 30 ~ 120min of temperature lower calcination to be made.The expansive clinker can be with dispersible carrier（Blast-furnace cinder, copper ashes）Mixing, so as to form cement concrete highly-efficient swelling agent.Expansive clinker and swelling agent prepared by the present invention, has three kinds of calcium hydroxide, iron hydroxide and entringite expansion sources concurrently, and the entringite class swelling agent of the more single expansion sources of its expansion performance is substantially improved；And it contains hydraulic cement component has certain enhancing effect to the later stage mechanical property of cement concrete.
Description
Technical field
The invention belongs to construction material technical field of concrete additives, and in particular to a kind of cement concrete is used efficiently swollen
Swollen clinker, its preparation method and its application.
Background technology
Concrete material is a kind of wide material sources, cheap construction material, with the development of Concrete Science And Technology,
Application of the concrete material in various architectural engineerings is also more and more extensive.However, cement concrete is anti-due to the aquation of itself
Should and surrounding medium dehydration process, there is self-constriction, dry and shrink and temperature drop shrinks, be also easy to produce receipts under constraints
Contracting cracking, have a strong impact on the durability of concrete.The contraction distortion cracking of cement concrete has been engineering circles common concern, is adopted
Also reached common understanding in theory by people with the contraction of expanding material compensation cement concrete.Using expansion component in aquation mistake
The contraction of caused volumetric expansion compensation cement-based material in journey, is to reduce concrete structure cracking, it is steady to improve concrete structure
Qualitatively one of important measures.
The calcium sulphoaluminate class using entringite as main expansion sources is generally used to expand in China's concrete structure engineering at present
Agent.Published document shows that most domestic swelling agent manufacturer mainly uses provides SO with anhydrite3, with alumina,
Open the natural minerals such as stone and soluble Al is provided2O3Technology path, formulate different factory formulas.Recently as the height of economy
Speed development, exceedingly exploitation cause China's bauxite resource, anhydrite resource increasingly deficient, resource reserves rapid decrease,
Swelling agent production cost is caused to improve.In addition, many enterprises are based on cost consideration, use is cheap, Al2O3And SO3Content is low
Raw material, cause the expansion character of swelling agent relatively low.The valuable mineral resources exhaustive exploitation such as alumina, is unfavorable for protecting ecology ring
Border and the saving of resource, the strategic requirement of sustainable development of China is run counter to, there is an urgent need to new substitute products.
Publication number CN102219422A Chinese patent literature disclose it is a kind of by the use of lime stone and 1-5% iron powder as
The method that raw material mixed calcining prepares cement expansive material.Such a swelling agent uses oneself of the iron and steel smeltings such as magnetic iron ore, bloodstone
Right mineral resources is unfavorable for the saving and environmental protection of mineral resources as iron powder material；And the expansion performance of swelling agent is substantially in water
Basic performance is complete in change age 3d, the shortcomings of expansion performance is low, and calcining heat is high be present.
Publication number CN1139079A Chinese patent literature discloses one kind and uses lime stone, flyash, iron powder and mineralising
The method that agent prepares swelling agent as raw material mixed calcining.This swelling agent effectively crack preventing can produce, but exist swollen
The shortcomings that swollen efficiency is low；Using the natural mineral resources such as bloodstone as iron powder material, it is unfavorable for environmental protection.
Publication number CN102745933A Chinese patent literature disclose it is a kind of using calcia linker, gypsum, dickite,
Flyash and wollastonite in powder are cracking resistance swelling agent prepared by raw material.The swelling agent has enhancing, impervious effect, but expansion be present
The shortcomings that efficiency is low, clinker burning temperature is high；And largely using non-renewable natural resources of bauxite class such as dickites.
Publication number CN102838308A Chinese patent literature discloses one kind and prepares coagulation using gypsum, iron powder and coke
The method of soil expansion clinker.Coke as important chemical industry raw material, need under the conditions of 950~1050 DEG C high-temperature retorting system
；Such a method makes the complexity that production process becomes, and link redundancy, preparation process high energy consumption, is unfavorable for energy-conserving and environment-protective.Expansion component
In contain 0.5~2.0% CaS mineral；CaS is stored or is added to the water in the air of damp temperature, is also easy to produce H2S toxic gases,
The shortcomings of in the presence of being detrimental to health.
Publication number CN104671687A Chinese patent literature discloses a kind of lime stone, magnesium slag, gypsum, scum and disperseed
The method that dust prepares cement expansive material.The calcining heat of such a method is high, high energy consumption, is unfavorable for energy-conserving and environment-protective.20~
40% magnesia calcines the dead roasting periclase expansion component of formation at 1300~1700 DEG C, lacking for later stage Delaying expansion be present
Point.
Above-mentioned swelling agent is all to be used as replacement by the use of iron powder, flyash, wollastonite in powder, coke, magnesium slag and scattered dust etc.
Raw material prepares cement expansive material, and generally existing hydration rate is fast, expansion performance is low；High energy consumption is prepared, the problems such as complex process.
Therefore, need badly and solved to above mentioned problem, optimize its expansion performance while largely utilizing solid waste.
Pyrite cinder is the byproduct in troilite preparation process, and its main component is Fe2O3、Al2O3、SiO2And SO3
Deng.China often produced the burning that 1 ton of sulfuric acid wants 0.7~1.0 ton of output every year with about 14,000,000 tons of production of sulfur from pyrite acid in recent years
Slag；The slag more than 10,000,000 tons is discharged in the whole nation every year, accounts for the 30% of chemical industry waste.As handled or dealing with improperly not in time,
A large amount of pyrite cinders cause seriously to pollute to local environment, are detrimental to health.
Rice hull ash is mainly by SiO2, C and Al2O3Deng composition.Rice hull ash is mainly derived from the burning and pyrolysis of rice husk.China
It is paddy big producer, about produces more than 40,000,000 tons of rice husk every year.With the development of paddy processing technology, rice husk day accumulates the moon
Tired to stockpile excessively, how handling rice husk must solve the problems, such as processing enterprise.With the enhancing of energy conservation and environmental awareness, rice husk
As a kind of biomass fuel, being burnt or being pyrolyzed provides energy to generate electricity or producing preboiled rice etc..Using rice husk as can be again
The preferred embodiment of raw fuel applications, obtains the encouragement and support of country, builds the biomass power plant using rice husk as fuel, or will
Existing small thermal power unit is transformed into biomass fuel unit, the emphasis being included in China's regenerative resource Long-and Medium-term Development planning
Field.But the rice hull ash formed after combusting rice hull, the problem of equally existing the wasting of resources and environmental pollution is such as handled not in time.
Using containing more Fe in solid waste (pyrite cinder, rice hull ash)2O3、Al2O3、SiO2, C and SO3Deng,
Cement expansive material is prepared, for economizing on resources, is preserved the ecological environment significant.
The content of the invention
Based on considering using solid waste (pyrite cinder, rice hull ash), for former using substituting in the prior art
Expect the swelling agent prepared, generally existing hydration rate is fast, expansion performance is low, prepares high energy consumption, the problems such as complex process, the present invention
Provide one kind and prepare concrete high-efficiency expansive clinker and its preparation side using trade wastes such as pyrite cinder, rice hull ash
Method.
It is an object of the invention to provide a kind of highly expanded efficiency, the efficient expansion clinker of lifting cement concrete strength.Should
Expansive clinker provides calcium source by lime stone, makes full use of the Fe in the solid waste such as pyrite cinder, rice hull ash2O3、Al2O3、
SiO2, C and SO3Deng material, on the premise of raw material reaction completely is ensured, low temperature calcination prepares gained.
To achieve the above object, concrete technical scheme of the invention is as follows：
A kind of cement concrete efficient expansion clinker, it includes following components, and mass percent shared by each component is：
A kind of cement concrete preparation method of efficient expansion clinker of the present invention, comprises the following steps：
(1) by lime stone, pyrite cinder and rice hull ash combined grinding into 150~400m of specific surface area2/ kg raw material；
(2) raw material made from step (1) are placed in 30~120min of calcining at 1100~1350 DEG C, after calcining in atmosphere
Quenching, obtain cement concrete efficient expansion clinker；
(3) cement concrete made from step (2) is milled to 200~450m of specific surface area with efficient expansion chamotte powder2/kg
Powder；
The cement concrete is formed with the raw material of efficient expansion clinker：Lime stone：60~80wt%, pyrite cinder：
15~30wt%, rice hull ash：5~10wt%.
The main chemical compositions of the pyrite cinder are preferred：Fe2O3：30~70wt%, Al2O3：15~45wt%,
SiO2：10~55wt%, SO3：1~5wt%；The main chemical compositions of the rice hull ash are preferred：SiO2：55~75wt%, C：25
~35wt%, Al2O3：3~8wt%；The raw limestone of the raw limestone, preferably CaO content >=53%.
It is thin to grinding that raw material and cement concrete the efficient expansion clinker need to reach common raw material and expansive clinker
The requirement of degree.As priority scheme, 150~400m of specific surface area of the raw material2/kg；The specific surface area of the expansive clinker
For 200~450m2/kg。
The present invention calcines the device prepared to expansive clinker and raw material state in which is not particularly limited.Expansive clinker can be with
Calcine and prepare in shaft kiln, tunnel cave, roller kilns or rotary kiln.Preferably, the expansive clinker uses rotary kiln system
It is standby.
Raw material are placed in 1100~1350 DEG C of 30~120min of temperature lower calcination, preferably, institute described in step (2)
It is 1200~1300 DEG C to state calcining heat, calcination time 60min.
A kind of cement concrete efficient expansion clinker of the present invention：F-CaO reacts to form Ca (OH) through water2；
Fe2O3Fe (OH) is formed under the conditions of aqueous slkali with Fe3；C4A3S easily forms entringite in the basic conditions.Height of the present invention
The advantages of effect expansive clinker has three kinds of calcium hydroxide, iron hydroxide and entringite expansion sources concurrently, has larger expansion performance.
A kind of cement concrete of the present invention is mixed in concrete with efficient expansion clinker, C in expansive clinker4AF has
There is certain early strength；SiO2Powder has the effectiveness of air-free concrete pore structure；C2After S has stabilizing concrete material
The effect of phase intensity.Efficient expansion clinker of the present invention has lifting concrete strength, air-free concrete pore structure
Effectiveness.
The cement concrete efficient expansion clinker can mix with dispersible carrier, so as to form cement concrete with swollen
Swollen dose；The dispersible carrier is blast-furnace cinder, copper ashes or compound by 50~80wt% blast-furnace cinders and 20~50wt% copper ashes
Into mixture；The mass ratio of the expansive clinker and dispersible carrier is 25：80~60：40.
The cement concrete swelling agent need to reach requirement of the common swelling agent to grinding fineness.As preferential side
Case, the specific surface area of the swelling agent is 200~450m2/kg。
Compared with prior art, the beneficial effects of the invention are as follows：
(1) cement is prepared using non-renewable resources such as the waste residues such as pyrite cinder, rice hull ash replacement alumina, anhydrite to mix
Solidifying soil expansion material, effective processing for solid waste (pyrite cinder, rice hull ash) provide an effective way, for
Economize on resources, preserving the ecological environment has great importance.
(2) using lime stone, pyrite cinder and rice hull ash as primary raw material, it is prepared for one kind by common processes and has hydrogen concurrently
The expanding material of three kinds of calcium oxide, iron hydroxide and entringite expansion sources；The entringite class of the more single expansion sources of expansion performance is swollen
Swollen dose is substantially improved, and reduces the production cost for preparing expansive clinker.
(3) because containing C in expansive clinker4AF、C2The hydraulic cementing materials such as S, contain solid cement concrete hole gap structure
Active SiO2Powder, compared with existing commercial concrete swelling agent, hence it is evident that resistance to compression, the anti-folding for improving cement-based material are strong
Degree.
(4) preparation method of cement concrete provided by the invention efficient expansion clinker, there is raw material use to facilitate,
The characteristics of being easily obtained；Preparation is simple, easy to utilize.
Brief description of the drawings
Expansive clinker, commercially available CSA expansive clinker and HP-CSA expansive clinkers of the Fig. 1 (a) obtained by embodiment one are 20
Maintenance, 10% volume in DEG C water, mortar limited expansion rate during W/C=0.4；1-0 samples are commercially available HP-CSA expansive clinkers, 1-
No. 1 sample is commercially available CSA expansive clinkers, and 1-2 samples are obtained expansive clinker.
Fig. 1 (b) is that the limit that the C35 strength grades concrete of obtained swelling agent conserves in 20 DEG C of water is mixed in embodiment one
Swell increment processed；1-2-0 samples are the C35 concrete for not mixing swelling agent, and 1-2-6 samples are the interior C35 coagulations for mixing 6% swelling agent
Soil, 1-2-8 samples are the interior C35 concrete for mixing 8% swelling agent.
Fig. 2 is the X ray diffracting spectrum of clinker in embodiment three.
Fig. 3 is the scanning electron microscope (SEM) photograph (× 5000) of clinker in embodiment three.
Expansive clinker, commercially available CSA expansive clinkers of the Fig. 4 obtained by example IV conserve in 20 DEG C of water, 10% volume,
Mortar limited expansion rate during W/C=0.4；4-0 samples are commercially available CSA expansive clinkers, 4-1 samples, 4-2 samples, 4-3 samples and
4-4 samples are respectively mass ratio 60：30：10、70：25：5、75：20：5 and 80：15：5 lime stone, pyrite cinder and rice
Expansive clinker prepared by shell ash calcining.
Embodiment
With reference to specific embodiment to a kind of cement concrete efficient expansion clinker and preparation method thereof of the present invention
Technical characteristic is expanded on further, but is not limited to embodiment；In the present invention, except there is special instruction, all percentage compositions are quality
Percentage.
Embodiment one：
(1) preparation of a kind of cement concrete efficient expansion clinker
Each component is taken by the raw material composition and mass fraction of pyrite cinder 22%, rice hull ash 8% and lime stone 70%, is broken
Through grinding machine intergrinding to fineness it is 250m after broken mixing2/ kg raw meal powder.Raw meal powder after grinding is forged at 1300 DEG C
Burn, and calcine 60min at such a temperature, firing sample quenching in atmosphere is taken out in calcining immediately after terminating, grinding, which is made, compares table
Area is 300m2/ kg cement concrete expansive clinker powder.
Table 1 is the chemical composition (wt.%) of raw material lime stone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Lime stone | 54.07 | 1.72 | 0.58 | 0.25 | - | 0.18 | - | 43.2 |
| Pyrite cinder | 6.17 | 44.80 | 26.86 | 17.11 | 3.70 | 0.13 | - | 1.23 |
| Rice hull ash | 1.60 | 1.49 | 5.81 | 58.59 | - | 30.53 | 32.51 |
(2) cement concrete is tested with the expansion character of efficient expansion clinker
Establishing criteria《Cement expansive material》GB23439-2009 experimental methods, it is expansive clinker to above-mentioned preparation, commercially available
CSA expansive clinkers and commercially available HP-CSA expansive clinkers, which enter mortar limited expansion rate under the conditions of water-filling is supported, to be tested (see Fig. 1 (a)).
Fig. 1 (a) shows, under the conditions of water is supported, the mortar specimen of the expansive clinker of above-mentioned preparation is lasting swollen within 14d ages
It is swollen, expand and tend towards stability after 14d ages.Compared with commercially available CSA expansive clinkers and HP-CSA expansive clinkers, the expansion of above-mentioned preparation
Clinker has larger expansion performance.
(3) preparation of cement concrete high-efficiency expanding agent
Above-mentioned expansive clinker is mixed with dispersible carrier (blast-furnace cinder, copper ashes), it is 250m to form specific surface area2/kg
Cement expansive material.The mass ratio of expansive clinker and dispersible carrier is 40：60.Blast-furnace cinder and copper ashes in dispersible carrier
Mass ratio be 80：20.
(4) the deformation performance test of the C35 strength grade concrete of water mixing cement concrete high-efficiency expanding agent
Foundation《Expansive concrete application technology code》Different swelling agents are mixed by JGJ/T 178-2009 experimental methods
The concrete limited expansion rate that the C35 concrete of amount enters under the conditions of water-filling is supported is tested (see Fig. 1 (b)).
Table 2 mixes the match ratio (kg/m of the C35 concrete of the above-mentioned swelling agent of 0%, 6% and 8% in3)
Fig. 1 (b) shows, under the conditions of water is supported, with the increase of above-mentioned expansive agent dosage, the dilatancy of C35 concrete increases
Greatly.When 14d is conserved in water, the limited expansion rate for inside mixing the C35 concrete of 6% above-mentioned cement expansive material meets《Compensation is shunk
Concrete application technology code》The limited expansion rate value requirement of the structure positions such as middle post-cast strip, expansion reinforcing band.
Embodiment two：
(1) preparation of cement concrete efficient expansion clinker and swelling agent
It is 60 by mass ratio：30：The 10 broken mixing of lime stone, pyrite cinder and rice hull ash, through grinding machine intergrinding
It is 150m to fineness2/ kg raw meal powder.Raw meal powder after grinding is calcined at 1200 DEG C, and calcined at such a temperature
Firing sample quenching in atmosphere is taken out in 120min, calcining immediately after terminating, it is 400m that specific surface area, which is made, in grinding2/ kg water
Cement concrete expansive clinker powder.
Table 3 is the chemical composition (wt.%) of raw material lime stone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Lime stone | 54.07 | 1.72 | 0.58 | 0.25 | - | 0.18 | - | 43.2 |
| Pyrite cinder | 6.17 | 44.80 | 26.86 | 17.11 | 3.70 | 0.13 | - | 1.23 |
| Rice hull ash | 1.60 | 1.49 | 5.81 | 58.59 | - | 30.53 | 32.51 |
Above-mentioned expansive clinker is mixed with dispersible carrier (blast-furnace cinder, copper ashes), it is 300m to form specific surface area2/kg
Cement expansive material.
Table 4 is the swelling agent that expansive clinker is compounded to form with dispersible carrier different ratio
(2) performance test of cement concrete high-efficiency expanding agent
Using reference cement as defined in GB8076-2008, according to GB23439-2009《Cement expansive material》Experimental method,
The cement concrete prepared to the present invention is detected with the performance of high-efficiency expanding agent, and is expanded with commercially available CSA swelling agents, CEA
The performance of agent is contrasted.
Table 5 is the swelling agent, CSA swelling agents and the mortar deformation of CEA swelling agents and mechanical property for mixing above-mentioned preparation
Testing result shows in table 5, and the expansion character for the swelling agent that above-mentioned expansive clinker is prepared reaches GB23439-2009
The II type product requirement of standard, and have the effect that has a certain upgrade to mortar specimen 28d compression strength.With commercially available CSA swelling agents,
CEA swelling agents are compared, and the swelling agent that above-mentioned expansive clinker is prepared has been obviously improved the compression strength of mortar.
Embodiment three：
(1) preparation of cement concrete efficient expansion clinker and swelling agent
It is 75 by mass ratio：20：The 5 broken mixing of lime stone, pyrite cinder and rice hull ash, through grinding machine intergrinding extremely
Fineness is 400m2/ kg raw meal powder.Raw meal powder after grinding is calcined at 1350 DEG C, and calcines 30min at such a temperature,
Firing sample quenching in atmosphere is taken out in calcining immediately after terminating, it is 200m that specific surface area, which is made, in grinding2/ kg cement concrete
With expansive clinker powder.
Table 6 is the chemical composition (wt.%) of raw material lime stone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Lime stone | 54.07 | 1.72 | 0.58 | 0.25 | - | 0.18 | - | 43.2 |
| Pyrite cinder | 6.17 | 44.80 | 26.86 | 17.11 | 3.70 | 0.13 | - | 1.23 |
| Rice hull ash | 1.60 | 1.49 | 5.81 | 58.59 | - | 30.53 | 32.51 |
The XRD and sem analysis of the expansive clinker of above-mentioned preparation are shown in Fig. 2, Fig. 3.As shown in Figure 2, prepared clinker mineral
Predominantly f-CaO, Fe2O3、C2S、SiO2、C4AF、C4A3S and Fe, and each crystallizable mineral is good.Fig. 3 is that clinker amplifies 5000 times
Scanning electron microscope (SEM) photograph, it can be seen that various mineral are interleaved with each other, and a large amount of subparticles are present；Such a subparticle can solid cement base material
The mechanical property of material, lifting cement-based material.
Above-mentioned expansive clinker is mixed with dispersible carrier (blast-furnace cinder, copper ashes), it is 450m to form specific surface area2/kg
Cement expansive material.
Table 7 is the swelling agent that different expansive clinkers are compounded to form with dispersible carrier
(2) performance test of cement concrete high-efficiency expanding agent
Using reference cement as defined in GB8076-2008, according to GB23439-2009《Cement expansive material》Experimental method,
The cement concrete prepared to the present invention is detected with the performance of high-efficiency expanding agent, and is expanded with commercially available UEA swelling agents, HCSA
The performance of agent is contrasted.
Table 8 is the swelling agent, UEA swelling agents and the mortar deformation of HCSA swelling agents and mechanical property for mixing above-mentioned preparation
The test result of table 8 shows that the expansion character for the swelling agent that above-mentioned expansive clinker is prepared has reached GB23439-2009
The II type product requirement of standard, and there is certain enhancing effect to mortar specimen 28d.With commercially available UEA swelling agents, HCSA swelling agents
Performance compare, the swelling agent for preparing of the present invention has been obviously improved the compression strength of mortar.
Example IV：
(1) preparation of a kind of cement concrete efficient expansion clinker
By different quality than lime stone, the broken mixing of pyrite cinder and rice hull ash, through grinding machine intergrinding to fineness
For 300m2/ kg raw meal powder.Raw meal powder after grinding is calcined at 1250 DEG C, and calcines 90min at such a temperature, is calcined
Firing sample quenching in atmosphere is taken out after end immediately, it is 400m that specific surface area, which is made, in grinding2/ kg cement concrete is with swollen
Swollen clinker powder.
Table 9 is the chemical composition (wt.%) of raw material lime stone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Lime stone | 55.10 | 0.94 | 0.61 | 0.23 | - | 0.22 | - | 42.9 |
| Pyrite cinder | 3.27 | 50.32 | 25.71 | 15.21 | 3.89 | 0.09 | - | 1.51 |
| Rice hull ash | 1.01 | 0.50 | 6.27 | 60.34 | - | 0.18 | 31.25 | 31.70 |
Table 10 is the raw-meal ingredient (wt.%) of lime stone, pyrite cinder and rice hull ash
(2) cement concrete is tested with the expansion character of efficient expansion clinker
Establishing criteria《Cement expansive material》GB23439-2009 experimental methods, it is expansive clinker to above-mentioned preparation, commercially available
CSA expansive clinkers, which enter mortar limited expansion rate under the conditions of water-filling is supported, to be tested (see Fig. 4).
Fig. 4 shows, under the conditions of water is supported, the mortar specimen of the expansive clinker of the above-mentioned preparation prolonged expansion within 14d ages,
Expansion tends towards stability after 14d ages.Compared with commercially available CSA expansive clinkers, the expansive clinker of above-mentioned preparation has larger expansion
Efficiency.
(3) preparation of cement concrete high-efficiency expanding agent
Above-mentioned expansive clinker is mixed with dispersible carrier (blast-furnace cinder, copper ashes), it is 300m to form specific surface area2/kg
Cement expansive material.The mass ratio of expansive clinker and dispersible carrier is 30：70.Blast-furnace cinder and copper ashes in dispersible carrier
Mass ratio be 50：50.
Table 11 is the swelling agent that different expansive clinkers are compounded to form with dispersible carrier
(4) performance test of cement concrete high-efficiency expanding agent
Using reference cement as defined in GB8076-2008, according to GB23439-2009《Cement expansive material》Experimental method,
The cement concrete prepared to the present invention is detected with the performance of high-efficiency expanding agent, and is expanded with commercially available UEA swelling agents, CEA
The performance of agent is contrasted.
Table 12 is the swelling agent, UEA swelling agents and the mortar deformation of CEA swelling agents and mechanical property for mixing above-mentioned preparation
Testing result shows in table 12, and the expansion character for the swelling agent that above-mentioned expansive clinker is prepared reaches GB23439-2009
The II type product requirement of standard, and have the effect that has a certain upgrade to mortar specimen 28d compression strength.With commercially available UEA swelling agents,
CEA swelling agents are compared, and the swelling agent that above-mentioned expansive clinker is prepared has been obviously improved the compression strength of mortar.
Claims (4)
1. a kind of cement concrete preparation method of efficient expansion clinker, it is characterised in that comprise the following steps：
（1）By lime stone, pyrite cinder and rice hull ash combined grinding into the m of specific surface area 150 ~ 4002/ kg raw material；
（2）By step（1）Obtained raw material are placed at 1100 ~ 1350 DEG C 30 ~ 120min of calcining, quenching in atmosphere after calcining,
Obtain cement concrete efficient expansion clinker；
（3）By step（2）Obtained cement concrete is milled to 200 ~ 450m of specific surface area with efficient expansion chamotte powder2/ kg powder
Material；
The cement concrete is formed with the raw material of efficient expansion clinker：Lime stone：60 ~ 80wt%, pyrite cinder：15~
30wt%, rice hull ash：5~10wt%.
The main chemical compositions of the pyrite cinder are：Fe2O3：30 ~ 70wt%, Al2O3：15 ~ 45wt%, SiO2：10 ~ 55wt%,
SO3：1~5wt%；The main chemical compositions of the rice hull ash are：SiO2：55 ~ 75wt%, C：25 ~ 35wt%, Al2O3：3 ~ 8wt%, rice
Each chemical composition sum of shell ash is 100%；CaO content >=53% of the raw limestone；
Cement concrete efficient expansion clinker, comprising following components, mass percent shared by each component is：f-CaO：30
~ 60wt%, Fe2O3：5 ~ 40wt%, C2S：3 ~ 10wt%, C4AF：2 ~ 10wt%, SiO2：3 ~ 15wt%, Fe：3 ~ 12wt%, C4A3S：1~
8wt%。
A kind of 2. preparation method of cement concrete efficient expansion clinker according to claim 1, it is characterised in that institute
State expansive clinker and preparation is calcined in shaft kiln, tunnel cave, roller kilns or rotary kiln.
A kind of 3. preparation method of cement concrete efficient expansion clinker according to claim 1, it is characterised in that institute
Expansive clinker is stated to prepare using rotary kiln.
A kind of 4. preparation method of cement concrete efficient expansion clinker according to claim 1, it is characterised in that step
Suddenly（2）Described in calcining heat be 1200 ~ 1300 DEG C, calcination time 60min.
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| CN107311497B (en) * | 2016-12-26 | 2020-03-27 | 江苏苏博特新材料股份有限公司 | Concrete internal curing type expanding agent and preparation method thereof |
| CN108373301A (en) * | 2018-03-08 | 2018-08-07 | 代彦霞 | A kind of environmental protection anti-crack concrete |
| CN108218353A (en) * | 2018-03-23 | 2018-06-29 | 代彦霞 | A kind of high-intensity anti-cracking concrete |
| CN109231866B (en) * | 2018-10-12 | 2021-10-22 | 天津市金盛源特种建材有限公司 | Hydration heat inhibition type concrete expanding agent and preparation method thereof |
| CN111377629B (en) * | 2018-12-31 | 2022-05-31 | 江苏苏博特新材料股份有限公司 | Special efficient expanding agent for concrete filled steel tube and preparation method and application thereof |
| CN114014578B (en) * | 2021-11-25 | 2023-02-03 | 中建商品混凝土江西有限公司 | Expanding agent based on industrial waste and preparation method thereof |
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| CN1176231A (en) * | 1997-07-19 | 1998-03-18 | 浙江大学 | Production method of slightly expanded Portland cement |
| CN101333083A (en) * | 2008-08-05 | 2008-12-31 | 中国建筑材料科学研究总院 | High performance expansible cement clinker expansion agent series prepared thereby |
| CN101353231A (en) * | 2008-08-01 | 2009-01-28 | 湖南石门特种水泥有限公司 | High-magnesium moderate-heat portland cement and production method thereof |
| CN102838308A (en) * | 2012-09-19 | 2012-12-26 | 重庆三圣特种建材股份有限公司 | Expanded clinker as well as expansion agent and preparation method thereof |
| CN103951302A (en) * | 2014-04-14 | 2014-07-30 | 石家庄市功能建材有限公司 | Multipurpose high-calcium expansion clinker and preparation method thereof |
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| CN1176231A (en) * | 1997-07-19 | 1998-03-18 | 浙江大学 | Production method of slightly expanded Portland cement |
| CN101353231A (en) * | 2008-08-01 | 2009-01-28 | 湖南石门特种水泥有限公司 | High-magnesium moderate-heat portland cement and production method thereof |
| CN101333083A (en) * | 2008-08-05 | 2008-12-31 | 中国建筑材料科学研究总院 | High performance expansible cement clinker expansion agent series prepared thereby |
| CN102838308A (en) * | 2012-09-19 | 2012-12-26 | 重庆三圣特种建材股份有限公司 | Expanded clinker as well as expansion agent and preparation method thereof |
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