CN105712642A - Efficient expansion clinker for cement concrete, preparation method of efficient expansion clinker and application of efficient expansion clinker - Google Patents
Efficient expansion clinker for cement concrete, preparation method of efficient expansion clinker and application of efficient expansion clinker Download PDFInfo
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- CN105712642A CN105712642A CN201610023956.2A CN201610023956A CN105712642A CN 105712642 A CN105712642 A CN 105712642A CN 201610023956 A CN201610023956 A CN 201610023956A CN 105712642 A CN105712642 A CN 105712642A
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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 invention relates to efficient expansion clinker for cement concrete, a preparation method of the efficient expansion clinker and application of the efficient expansion clinker. The efficient expansion clinker is composed of, by weight, 30-60wt% of f-CaO, 5-40wt% of Fe2O3, 3-10wt% of C2S, 2-10wt% of C4AF, 3-15wt% of SiO2, 3-12wt% of Fe and 1-8wt% of C4A3S. The preparation method of the efficient expansion clinker includes: grinding 60-80wt% of limestone, 15-30wt% of pyrite cinders and 5-10wt% of rice husk ash, and well mixing to obtain raw materials; calcining the raw materials for 30-120min at the temperature of 1100-1350 DEG C to obtain the efficient expansion clinker. The expansion clinker can be mixed with dispersive carriers (such as blast furnace slag and copper slag) to form an efficient expanding agent for cement concrete. The expansion clinker and the expanding agent integrate three expanding sources including calcium hydroxide, ferric hydroxide and ettringite and are greatly promoted in expanding performance as compared with an ettringite type expanding agent with a single expanding source; due to a hydraulic binder component, later-stage mechanical properties of the cement concrete can be enhanced to some extent.
Description
Technical field
The invention belongs to construction material technical field of concrete additives, be specifically related to a kind of cement concrete efficient expansion grog, its preparation method and application thereof.
Background technology
Concrete material is a kind of wide material sources, cheap construction material, and along with the development of Concrete Science And Technology, concrete material application in various architectural engineerings is also more and more extensive.But, the dehydration process of the cement concrete hydration reaction due to self and surrounding medium, there is self-constriction, dry shrinkage and temperature drop and shrink, be easily generated shrinkage cracking under constraints, have a strong impact on concrete durability.The contraction distortion cracking of cement concrete has been engineering circles common concern, adopts being contracted in of expanding material compensation water cement concrete also to be reached common understanding by people in theory.Utilize the contraction of the volumetric expansion compensation water cement-based material that expansion component produces in hydration process, be reduce xoncrete structure cracking, improve one of important measures of concrete structure stability.
In current China concrete structure engineering commonly used be main expansion source with entringite calcium sulphoaluminate class extender.Published document shows, most domestic extender manufacturer mainly adopts provides SO with anhydrite3, provide solubility Al with the natural minerals such as Alumina, dickite2O3Technology path, formulate different factory formulas.Recently as rapid development of economy, exceedingly exploitation causes China's bauxite resource, anhydrite resource increasingly deficient, and resource reserves rapid decrease causes that extender production cost improves.It addition, a lot of enterprises are based on cost consideration, adopt cheap, Al2O3And SO3The raw material that content is low, causes that the expansion character of extender is relatively low.The mineral resources exhaustive exploitation that Alumina etc. are valuable, be unfavorable for preserving the ecological environment the saving with resource, runs counter to the strategic requirement of sustainable development of China, in the urgent need to new substitute products.
The Chinese patent literature of publication number CN102219422A discloses a kind of method that iron powder utilizing limestone and 1-5% prepares cement expansive material as raw material mixed calcining.This kind of extender adopts the natural mineral resources of the iron and steel smelting such as magnetic iron ore, bloodstone as iron powder material, is unfavorable for saving and the environmental conservation of mineral resources；And the expansion performance of the extender shortcomings such as basic performance is complete in hydration age 3d substantially, it is low to there is expansion performance, calcining heat height.
The Chinese patent literature of publication number CN1139079A discloses a kind of method adopting limestone, flyash, iron powder and mineralizer to prepare extender as raw material mixed calcining.This extender can effectively produce by crack preventing, but there is the shortcoming that expansion performance is low；Adopt the natural mineral resources such as bloodstone as iron powder material, be unfavorable for environmental conservation.
The Chinese patent literature of publication number CN102745933A discloses that a kind of to adopt calcia linker, Gypsum Fibrosum, dickite, flyash and wollastonite in powder be cracking resistance extender prepared by raw material.This extender has enhancing, impervious effect, but there is the shortcoming that expansion performance is low, clinker burning temperature is high；And a large amount of natural resources using the bauxite classes such as dickites non-renewable.
The Chinese patent literature of publication number CN102838308A discloses a kind of method utilizing Gypsum Fibrosum, iron powder and coke to prepare concrete expansion grog.Coke, as important chemical industry raw material, need to prepare by high-temperature retorting under 950～1050 DEG C of conditions；The complexity that this kind of method makes production process become, link redundancy, preparation process energy consumption is high, is unfavorable for energy-conserving and environment-protective.Containing the CaS mineral of 0.5～2.0% in expansion component；CaS stores in the air of tide temperature or is added to the water, and is easily generated H2, there is shortcomings such as being detrimental to health in S toxic gas.
The Chinese patent literature of publication number CN104671687A discloses a kind of method that limestone, magnesium slag, Gypsum Fibrosum, scum and dispersion dust prepare cement expansive material.The calcining heat of this kind of method is high, energy consumption is high, is unfavorable for energy-conserving and environment-protective.The magnesia of 20～40% calcines the dead roasting periclase expansion component of formation, the shortcoming that there is later stage Delaying expansion at 1300～1700 DEG C.
Above-mentioned extender is all utilize iron powder, flyash, wollastonite in powder, coke, magnesium slag and the dispersion raw material as an alternative such as dust to prepare cement expansive material, it is common to have that hydration rate is fast, expansion performance is low；The problems such as preparation energy consumption is high, complex process.Therefore, need badly and the problems referred to above are solved, while utilizing solid waste in a large number, optimize its expansion performance.
Pyrite cinder is the side-product in troilite preparation process, and it is mainly composed of Fe2O3、Al2O3、SiO2And SO3Deng.China was about 14,000,000 tons with production of sulfur from pyrite acid every year in recent years, often produces 1 ton of sulphuric acid and wants the slag of output 0.7～1.0 ton；The slag more than 10,000,000 tons is discharged in the whole nation every year, accounts for the 30% of chemical industry refuse.As processed not in time or dealing with improperly, local environment is caused severe contamination by a large amount of pyrite cinders, is detrimental to health.
Rice hull ash is mainly by SiO2, C and Al2O3Deng composition.Rice hull ash is mainly derived from burning and the pyrolysis of rice husk.China is Oryza glutinosa big producing country, about produces the rice husk of more than 40,000,000 tons every year.Along with the development of paddy processing technology, rice husk accumulates over a long period and stockpiles too much, and how processing rice husk becomes the problem that processing enterprise must solve.Along with the enhancing of energy-conserving and environment-protective consciousness, rice husk, as a kind of biomass fuel, is burnt or pyrolysis for generating or is produced the offer energy such as preboiled rice.Using the optimal way that rice husk is applied as recyclable fuel, obtain encouragement and the support of country, build the biomass power plant being fuel with rice husk, maybe existing small thermal power unit is transformed into biomass fuel unit, list the major fields in China's regenerative resource Long-and Medium-term Development planning in.But the rice hull ash formed after combusting rice hull, as processed the problem equally existing the wasting of resources and environmental pollution not in time.
Utilize in solid waste (pyrite cinder, rice hull ash) containing more Fe2O3、Al2O3、SiO2, C and SO3Deng, prepare cement expansive material, for economizing on resources, preserve the ecological environment significant.
Summary of the invention
Based on utilizing considering of solid waste (pyrite cinder, rice hull ash), for the extender utilizing alternative materials to prepare in prior art, ubiquity hydration rate is fast, expansion performance is low, preparation energy consumption is high, the problems such as complex process, the invention provides one and utilize the trade waste such as pyrite cinder, rice hull ash to prepare concrete high-efficiency expansive clinker and preparation method thereof.
It is an object of the invention to provide a kind of highly expanded usefulness, promote the efficient expansion grog of cement concrete strength.This expansive clinker is provided calcium source by limestone, makes full use of the Fe in the solid waste such as pyrite cinder, rice hull ash2O3、Al2O3、SiO2, C and SO3Deng material, under the premise ensureing raw material complete reaction, low temperature calcination prepares gained.
For achieving the above object, the concrete technical scheme of the present invention is as follows:
A kind of cement concrete efficient expansion grog, it comprises following components, and shared by each component, mass percent is:
The preparation method of a kind of cement concrete efficient expansion grog of the present invention, comprises the steps:
(1) limestone, pyrite cinder and rice hull ash mixed powder are worn into specific surface area 150～400m2The raw material of/kg；
(2) raw material that step (1) prepares are placed at 1100～1350 DEG C calcining 30～120min, quenching in atmosphere after calcining, it is thus achieved that cement concrete efficient expansion grog；
(3) the cement concrete efficient expansion chamotte powder that step (2) prepares is milled to specific surface area 200～450m2The powder of/kg；
The raw material composition of described cement concrete efficient expansion grog: limestone: 60～80wt%, pyrite cinder: 15～30wt%, rice hull ash: 5～10wt%.
The main chemical compositions of described pyrite cinder is preferred: Fe2O3: 30～70wt%, Al2O3: 15～45wt%, SiO2: 10～55wt%, SO3: 1～5wt%；The main chemical compositions of described rice hull ash is preferred: SiO2: 55～75wt%, C:25～35wt%, Al2O3: 3～8wt%；Described raw limestone, it is preferable that the raw limestone of CaO content >=53%.
Described raw material and cement concrete efficient expansion grog need to reach the requirement to grinding fineness of common raw material and expansive clinker.As priority scheme, the specific surface area 150～400m of described raw material2/ kg；The specific surface area of described expansive clinker is 200～450m2/kg。
Device and the raw material state in which of expansive clinker calcining preparation are not particularly limited by the present invention.Expansive clinker can calcine preparation in shaft kiln, tunnel cave, roller kilns or rotary kiln.Preferably, described expansive clinker adopts rotary kiln to prepare.
Raw material described in step (2) are placed in 1100～1350 DEG C of temperature lower calcination 30～120min, and preferably, described calcining heat is 1200～1300 DEG C, and calcination time is 60min.
A kind of cement concrete efficient expansion grog: f-CaO of the present invention forms Ca (OH) through water reaction2；Fe2O3Fe (OH) is formed when aqueous slkali with Fe3；C4A3S is easily formed entringite in the basic conditions.Efficient expansion grog of the present invention has the advantage of calcium hydroxide, hydrated ferric oxide. and three kinds of expansion sources of entringite concurrently, has bigger expansion performance.
A kind of cement concrete efficient expansion grog of the present invention mixes in concrete, C in expansive clinker4AF has certain early strength；SiO2Powder body has the effectiveness of air-free concrete pore structure；C2S has the effect of stabilizing concrete material later strength.Efficient expansion grog of the present invention has the effectiveness promoting concrete strength, air-free concrete pore structure.
Described cement concrete efficient expansion grog can mix with dispersible carrier, thus forming cement concrete extender；Described dispersible carrier is blast-furnace cinder, copper ashes or the mixture being combined into by 50～80wt% blast-furnace cinder and 20～50wt% copper ashes；The mass ratio of described expansive clinker and dispersible carrier is at 25:80～60:40.
Described cement concrete extender need to reach the requirement to grinding fineness of the common extender.As priority scheme, the specific surface area of described extender is 200～450m2/kg。
Compared with prior art, the invention has the beneficial effects as follows:
(1) adopt the waste residue such as pyrite cinder, rice hull ash to substitute the non-renewable resources such as Alumina, anhydrite and prepare cement concrete expanding material; provide an effective way for effectively processing of solid waste (pyrite cinder, rice hull ash), have great importance for economizing on resources, preserving the ecological environment.
(2) with limestone, pyrite cinder and rice hull ash for primary raw material, it is prepared for a kind of expanding material having calcium hydroxide, hydrated ferric oxide. and three kinds of expansion sources of entringite concurrently by common processes；The entringite class extender of the more single expansion sources of expansion performance is substantially improved, and reduces the production cost preparing expansive clinker.
(3) because expansive clinker contains C4AF、C2The hydraulic cementing materials such as S, containing the active SiO of solid cement concrete hole gap structure2Powder body, compared with existing commercially available cement expansive material, hence it is evident that improve the resistance to compression of cement-based material, rupture strength.
(4) preparation method of cement concrete efficient expansion grog provided by the invention, has raw material and adopts feature convenient, that be easily obtained；Preparation is simple, it is simple to popularization and application.
Accompanying drawing explanation
The Fig. 1 (a) expansive clinker obtained by embodiment one, commercially available CSA expansive clinker and the maintenance in 20 DEG C of water of HP-CSA expansive clinker, 10% volume, mortar limited expansion rate during W/C=0.4；1-0 sample is commercially available HP-CSA expansive clinker, and 1-1 sample is commercially available CSA expansive clinker, and 1-2 sample is obtained expansive clinker.
Fig. 1 (b) is for mixing C35 strength grade concrete confined expansion amount of maintenance in 20 DEG C of water of obtained extender in embodiment one；1-2-0 sample is the C35 concrete not mixing extender, and the C35 concrete of 6% extender mixed by 1-2-6 sample in being, the C35 concrete of 8% extender mixed by 1-2-8 sample in being.
Fig. 2 is the X ray diffracting spectrum of grog in embodiment three.
Fig. 3 is the scanning electron microscope (SEM) photograph (× 5000) of grog in embodiment three.
Fig. 4 is the expansive clinker obtained by embodiment four, commercially available CSA expansive clinker maintenance in 20 DEG C of water, 10% volume, mortar limited expansion rate during W/C=0.4；4-0 sample is commercially available CSA expansive clinker, the expansive clinker of 4-1 sample, 4-2 sample, 4-3 sample and 4-4 sample respectively mass ratio 60:30:10,70:25:5, the limestone of 75:20:5 and 80:15:5, pyrite cinder and rice hull ash calcining preparation.
Detailed description of the invention
Below in conjunction with specific embodiment, the technical characteristic of a kind of cement concrete efficient expansion grog of the present invention and preparation method thereof is expanded on further, but is not limited to embodiment；In the present invention, except there being special instruction, all percentage compositions are mass percent.
Embodiment one:
(1) preparation of a kind of cement concrete efficient expansion grog
Form by the raw material of pyrite cinder 22%, rice hull ash 8% and limestone 70% and mass fraction take each component, after broken mixing through grinding machine intergrinding to fineness be 250m2The raw meal powder of/kg.Being calcined at 1300 DEG C by raw meal powder after grinding, and calcine 60min at such a temperature, calcining takes out firing sample quenching in atmosphere after terminating immediately, and it is 300m that grinding prepares specific surface area2The cement concrete of/kg expansive clinker powder body.
Table 1 is the chemical composition (wt.%) of raw material limestone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Limestone | 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) the cement concrete expansion character of efficient expansion grog is tested
Establishing criteria " cement expansive material " GB23439-2009 experimental technique, carries out water and supports mortar limited expansion rate test (see Fig. 1 (a)) under condition the expansive clinker of above-mentioned preparation, commercially available CSA expansive clinker and commercially available HP-CSA expansive clinker.
Fig. 1 (a) shows, supports under condition at water, and the mortar specimen of the expansive clinker of above-mentioned preparation is prolonged expansion within 14d age, expands and tend towards stability after 14d age.Compared with commercially available CSA expansive clinker and HP-CSA expansive clinker, the expansive clinker of above-mentioned preparation has bigger expansion performance.
(3) preparation of cement concrete high-efficiency expanding agent
Being mixed with dispersible carrier (blast-furnace cinder, copper ashes) by above-mentioned expansive clinker, forming specific surface area is 250m2The cement expansive material of/kg.The mass ratio of expansive clinker and dispersible carrier is 40:60.In dispersible carrier, the mass ratio of blast-furnace cinder and copper ashes is 80:20.
(4) the concrete deformation performance test of the C35 strength grade of water mixing cement concrete high-efficiency expanding agent
According to " expansive concrete application technology code " JGJ/T178-2009 experimental technique, the C35 concrete of different expansive agent dosages is carried out concrete limited expansion rate test (see Fig. 1 (b)) that water is supported under condition.
Concrete match ratio (the kg/m of C35 of 0%, 6% and 8% above-mentioned extender mixed by table 2 in being3)
Fig. 1 (b) shows, supports under condition at water, and along with above-mentioned expansive agent dosage increases, the concrete dilatancy of C35 increases.In water during maintenance 14d, the concrete limited expansion rate of C35 inside mixing 6% above-mentioned cement expansive material meets the limited expansion rate value requirement of the structure position such as post-cast strip, expansion reinforcing band in " expansive concrete application technology code ".
Embodiment two:
(1) the cement concrete preparation of efficient expansion grog and extender
It is the broken mixing of the limestone of 60:30:10, pyrite cinder and rice hull ash by mass ratio, is 150m through grinding machine intergrinding to fineness2The raw meal powder of/kg.Being calcined at 1200 DEG C by raw meal powder after grinding, and calcine 120min at such a temperature, calcining takes out firing sample quenching in atmosphere after terminating immediately, and it is 400m that grinding prepares specific surface area2The cement concrete of/kg expansive clinker powder body.
Table 3 is the chemical composition (wt.%) of raw material limestone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Limestone | 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 |
Being mixed with dispersible carrier (blast-furnace cinder, copper ashes) by above-mentioned expansive clinker, forming specific surface area is 300m2The cement expansive material of/kg.
Table 4 is the extender that expansive clinker is compounded to form with dispersible carrier different ratio
(2) performance test of cement concrete high-efficiency expanding agent
Adopt the GB8076-2008 reference cement specified, according to GB23439-2009 " cement expansive material " experimental technique, the performance of cement concrete high-efficiency expanding agent prepared by the present invention detects, and contrasts with the performance of commercially available CSA extender, CEA extender.
Table 5 is mortar deformation and the mechanical property of mixing the extender of above-mentioned preparation, CSA extender and CEA extender
In table 5, testing result shows, the expansion character of the extender of above-mentioned expansive clinker preparation reaches II type product requirement of GB23439-2009 standard, and the comprcssive strength of mortar specimen 28d is had the effect that has a certain upgrade.Compared with commercially available CSA extender, CEA extender, the extender of above-mentioned expansive clinker preparation has been obviously improved the comprcssive strength of mortar.
Embodiment three:
(1) the cement concrete preparation of efficient expansion grog and extender
It is the broken mixing of the limestone of 75:20:5, pyrite cinder and rice hull ash by mass ratio, is 400m through grinding machine intergrinding to fineness2The raw meal powder of/kg.Being calcined at 1350 DEG C by raw meal powder after grinding, and calcine 30min at such a temperature, calcining takes out firing sample quenching in atmosphere after terminating immediately, and it is 200m that grinding prepares specific surface area2The cement concrete of/kg expansive clinker powder body.
Table 6 is the chemical composition (wt.%) of raw material limestone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Limestone | 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 |
XRD and the 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 is mainly f-CaO, Fe2O3、C2S、SiO2、C4AF、C4A3S and Fe, and each crystallizable mineral is good.Fig. 3 is that grog amplifies 5000 times of scanning electron microscope (SEM) photographs, it can be seen that various mineral interweave mutually, and a large amount of subparticles exist；This kind of subparticle can solid cement sill, promote the mechanical property of cement-based material.
Being mixed with dispersible carrier (blast-furnace cinder, copper ashes) by above-mentioned expansive clinker, forming specific surface area is 450m2The cement expansive material of/kg.
Table 7 is the extender that different expansive clinker is compounded to form with dispersible carrier
(2) performance test of cement concrete high-efficiency expanding agent
Adopt the GB8076-2008 reference cement specified, according to GB23439-2009 " cement expansive material " experimental technique, the performance of cement concrete high-efficiency expanding agent prepared by the present invention detects, and contrasts with the performance of commercially available UEA extender, HCSA extender.
Table 8 is mortar deformation and the mechanical property of mixing the extender of above-mentioned preparation, UEA extender and HCSA extender
Table 8 test result shows, the expansion character of the extender of above-mentioned expansive clinker preparation has reached II type product requirement of GB23439-2009 standard, and mortar specimen 28d is had certain reinforced effects.With commercially available UEA extender, HCSA extender performance compared with, extender prepared by the present invention has been obviously improved the comprcssive strength of mortar.
Embodiment four:
(1) preparation of a kind of cement concrete efficient expansion grog
By broken to the limestone of different quality ratio, pyrite cinder and rice hull ash mixing, it is 300m through grinding machine intergrinding to fineness2The raw meal powder of/kg.Being calcined at 1250 DEG C by raw meal powder after grinding, and calcine 90min at such a temperature, calcining takes out firing sample quenching in atmosphere after terminating immediately, and it is 400m that grinding prepares specific surface area2The cement concrete of/kg expansive clinker powder body.
Table 9 is the chemical composition (wt.%) of raw material limestone, pyrite cinder and rice hull ash
| Title | CaO | Fe2O3 | Al2O3 | SiO2 | SO3 | MgO | C | Loss |
| Limestone | 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 limestone, pyrite cinder and rice hull ash
(2) the cement concrete expansion character of efficient expansion grog is tested
Establishing criteria " cement expansive material " GB23439-2009 experimental technique, carries out water support mortar limited expansion rate test (see Fig. 4) under condition to the expansive clinker of above-mentioned preparation, commercially available CSA expansive clinker.
Fig. 4 shows, supports under condition at water, and the mortar specimen of the expansive clinker of above-mentioned preparation is prolonged expansion within 14d age, expands and tend towards stability after 14d age.Compared with commercially available CSA expansive clinker, the expansive clinker of above-mentioned preparation has bigger expansion performance.
(3) preparation of cement concrete high-efficiency expanding agent
Being mixed with dispersible carrier (blast-furnace cinder, copper ashes) by above-mentioned expansive clinker, forming specific surface area is 300m2The cement expansive material of/kg.The mass ratio of expansive clinker and dispersible carrier is 30:70.In dispersible carrier, the mass ratio of blast-furnace cinder and copper ashes is 50:50.
Table 11 is the extender that different expansive clinker is compounded to form with dispersible carrier
(4) performance test of cement concrete high-efficiency expanding agent
Adopt the GB8076-2008 reference cement specified, according to GB23439-2009 " cement expansive material " experimental technique, the performance of cement concrete high-efficiency expanding agent prepared by the present invention detects, and contrasts with the performance of commercially available UEA extender, CEA extender.
Table 12 is mortar deformation and the mechanical property of mixing the extender of above-mentioned preparation, UEA extender and CEA extender
In table 12, testing result shows, the expansion character of the extender of above-mentioned expansive clinker preparation reaches II type product requirement of GB23439-2009 standard, and the comprcssive strength of mortar specimen 28d is had the effect that has a certain upgrade.Compared with commercially available UEA extender, CEA extender, the extender of above-mentioned expansive clinker preparation has been obviously improved the comprcssive strength of mortar.
Claims (9)
1. a cement concrete efficient expansion grog, it is characterised in that comprising following components, shared by 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%.
2. the preparation method of a kind of cement concrete efficient expansion grog described in claim 1, it is characterised in that comprise the steps:
(1) limestone, pyrite cinder and rice hull ash mixed powder are worn into specific surface area 150 ~ 400m2The raw material of/kg；
(2) raw material that step (1) prepares are placed at 1100 ~ 1350 DEG C calcining 30 ~ 120min, quenching in atmosphere after calcining, it is thus achieved that cement concrete efficient expansion grog；
(3) the cement concrete efficient expansion chamotte powder that step (2) prepares is milled to specific surface area 200 ~ 450m2The powder of/kg；
The raw material composition of described cement concrete efficient expansion grog: limestone: 60 ~ 80wt%, pyrite cinder: 15 ~ 30wt%, rice hull ash: 5 ~ 10wt%.
3. the preparation method of a kind of cement concrete efficient expansion grog according to claim 2, it is characterised in that the main chemical compositions of described pyrite cinder is: Fe2O3: 30 ~ 70wt%, Al2O3: 15 ~ 45wt%, SiO2: 10 ~ 55wt%, SO3: 1 ~ 5wt%；The main chemical compositions of described rice hull ash is: SiO2: 55 ~ 75wt%, C:25 ~ 35wt%, Al2O3: 3 ~ 8wt%；CaO content >=53% of described raw limestone.
4. the preparation method of a kind of cement concrete efficient expansion grog according to claim 2, it is characterised in that the specific surface area 150 ~ 400m of described raw material2/ kg；The specific surface area of described expansive clinker is 200 ~ 450m2/kg。
5. the preparation method of a kind of cement concrete efficient expansion grog according to claim 2, it is characterised in that described expansive clinker can calcine preparation in shaft kiln, tunnel cave, roller kilns or rotary kiln.
6. the preparation method of a kind of cement concrete efficient expansion grog according to claim 5, it is characterised in that described expansive clinker adopts rotary kiln to prepare.
7. the preparation method of a kind of cement concrete efficient expansion grog according to claim 2, it is characterised in that calcining heat described in step (2) is 1200 ~ 1300 DEG C, and calcination time is 60min.
8. the application process of a kind of cement concrete efficient expansion grog described in claim 1, it is characterised in that described cement concrete efficient expansion grog can mix with dispersible carrier, thus forming cement concrete extender；Described dispersible carrier is blast-furnace cinder, copper ashes or the mixture being combined into by 50 ~ 80wt% blast-furnace cinder and 20 ~ 50wt% copper ashes；The mass ratio of described expansive clinker and dispersible carrier is at 25:80 ~ 60:40.
9. the application process of a kind of cement concrete efficient expansion grog according to claim 8, it is characterised in that the specific surface area of described extender is 200 ~ 450m2/kg。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610023956.2A CN105712642B (en) | 2016-01-14 | 2016-01-14 | A kind of cement concrete efficient expansion clinker, its preparation method and its application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107311497A (en) * | 2016-12-26 | 2017-11-03 | 江苏苏博特新材料股份有限公司 | Maintaining swelling agent and preparation method thereof in a kind of concrete |
| CN108218353A (en) * | 2018-03-23 | 2018-06-29 | 代彦霞 | A kind of high-intensity anti-cracking concrete |
| CN108373301A (en) * | 2018-03-08 | 2018-08-07 | 代彦霞 | A kind of environmental protection anti-crack concrete |
| CN109231866A (en) * | 2018-10-12 | 2019-01-18 | 天津市金盛源特种建材有限公司 | A kind of heat of hydration suppressive cement expansive material and preparation method thereof |
| CN111377629A (en) * | 2018-12-31 | 2020-07-07 | 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 |
| CN114014578A (en) * | 2021-11-25 | 2022-02-08 | 中建商品混凝土有限公司 | Expanding agent based on industrial waste and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107311497A (en) * | 2016-12-26 | 2017-11-03 | 江苏苏博特新材料股份有限公司 | Maintaining swelling agent and preparation method thereof in a kind of concrete |
| 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 |
| CN109231866A (en) * | 2018-10-12 | 2019-01-18 | 天津市金盛源特种建材有限公司 | A kind of heat of hydration suppressive cement expansive material and preparation method thereof |
| 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 |
| CN111377629A (en) * | 2018-12-31 | 2020-07-07 | 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 |
| 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 |
| CN114014578A (en) * | 2021-11-25 | 2022-02-08 | 中建商品混凝土有限公司 | Expanding agent based on industrial waste and preparation method thereof |
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| CN105712642B (en) | 2018-01-02 |
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