CN100506738C - Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof - Google Patents
Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof Download PDFInfo
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- CN100506738C CN100506738C CNB2007102001437A CN200710200143A CN100506738C CN 100506738 C CN100506738 C CN 100506738C CN B2007102001437 A CNB2007102001437 A CN B2007102001437A CN 200710200143 A CN200710200143 A CN 200710200143A CN 100506738 C CN100506738 C CN 100506738C
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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Abstract
The invention discloses a concrete composition with hyperfine carbonate rock powder and allocating method, which comprises the following parts: polyvalent powder, additive, rough aggregate, fine aggregate and water, wherein the scale of polyvalent powder in per cubic meter concrete is 300kg/m3-550kg/m3, which contains 70kg/m3-150kg/m3 hyperfine carbonate rock powder, 20%-100% cement and mineral material.
Description
(1) technical field
The present invention relates to a kind of concrete building material.
(2) background technology
Concrete is the most widely used material of construction in modern times, and it mixes mineral admixture based on cement, add water and admixture is mixed with binder paste, even with sand, stone mix again, be cast in the various models such as beam, post, wall, plate, setting and harden forms the engineering materials of an integral body.Concrete is after being mixed with water and hardened by multiple starting material, a kind of triphasic polynary heterogeneous cement-base composite material of solid, liquid, gas that contains of formation.Owing to have a large amount of miniature holes at inside concrete, the existence of these miniature holes has just influenced concrete degree of compactness, mechanical property and anti-permeability performance.Concrete water-cement ratio is the coagulation water in soil and the ratio of agglutination material weight, the intensity after the size decision concrete hardening of water-cement ratio, and influence the weather resistance of maturing.Water-cement ratio is more little, and concrete strength is high more.The concrete water amount depends primarily on the required serviceability of concrete construction, workability of concrete can be represented with the slump usually, even if mixed high efficiency water reducing agent when preparing the concrete of high workload performance in the past, concrete still needs more mixing water, under the certain situation of water consumption, be the high-intensity concrete of preparation, just need to improve the consumption of agglutination material to obtain lower water-cement ratio, raising along with the concrete preparation strength, cement consumption also improves thereupon, so just, bring a series of side effects, as the concrete temperature rise is improved, the volume stability of concrete variation is shunk and is strengthened and be easy to cracking, degradation under the endurance quality.In order to prepare high performance concrete, the research direction of modern concrete is low water binder ratio, mix high efficiency water reducing agent and various mineral admixture.Though these mineral admixtures have gelling and (or) the volcanic ash effect, add mineral admixture and can replace part cement, concrete durability is had certain improved action.Usually the mineral admixture that adopts is that flyash, ground slag, silicon ash, metakaolin, steel-making slag powder, phosphorus slag powder, zeolite powder etc. are the powder body material of major ingredient with one or more oxide compounds such as silicon, aluminium, calcium.Some has gelling in these mineral admixtures, can produce hydration reaction behind the chance water and generate gum material; Some has volcanic ash, the Ca (OH) that can generate with hydrated cementitious
2Chemical reaction takes place at normal temperatures, and generation has the component of gelling, and perhaps some has gelling and volcanic ash simultaneously.When the preparation high performance concrete, these mineral admixtures respectively have its advantage and deficiency because of the difference of speciality.Best as metakaolin, silicon ash reinforced effects, but the price height is uneconomical, metakaolin need be through calcining and levigate, and energy consumption is big, and the silicon ash can the increase concrete shrinkage; Mix the concrete of ground slag, during ground slag volume less than 70% the concrete hydrating temperature rise higher, but too high volume can increase concrete water bleeding; The concrete of fly ash can reduce temperature rise, but early strength is low; Steel-making slag powder grinding energy consumption height is active low; The inner porous of zeolite powder can increase the concrete water amount.
Cement is the main raw in the concrete, and the cement industry mass consumption resource and the energy are one of important environomental pollution sources.Cement production process is normally by " two mills one burn ", i.e. raw material preparation and grinding, clinker burning and three processes of cement grinding.Cement industry is SO
2, NO
xEtc. multiple discharge of harmful gases rich and influential family, these gases are harmful, can also form acid rain and acid mist infringement farm crop, forest and vegetation, harm ecotope, corrode buildings.Simultaneously, CaCO in the sintering process of cement clinker
3Decomposition and the burning of coal process in a large amount of CO that produce
2, 1 ton of cement of every production is 1 ton of CO of discharging approximately
2Gas, CO
2Be one of main greenhouse gases that impel global warming.In addition, manufacture of cement is wanted mass consumption fine limestone ore, clay and coal, and these all are Mineral resources and land resources that the mankind depend on for existence.And produce a large amount of mine tailings in the fat lime rock and ore recovery process, these mine tailings as refuse through accumulation all the year round, havoc ecotope.Therefore further reducing cement consumption in the concrete, further improve concrete every performance, is difficult topic of a technology that scientific and technical personnel face for a long time.
(3) summary of the invention
The purpose of this invention is to provide a kind of concrete composition and compound method thereof that contains ultra-fine carbonate rock powder; solve the problem that further improves mechanical performance of concrete and endurance quality; cement consumption in the concrete of the further minimizing of solution simultaneously and water consumption, the concrete cost performance of raising economize on resources and the energy, protection problem of environment.
This concrete composition that contains ultra-fine carbonate rock powder is formed by multicomponent powder, admixture, coarse aggregate, fine aggregate, water mixed preparing, and the multicomponent powder amount ranges is 300kg/m in every cubic meter of concrete
3-550kg/m
3, contain 70kg/m in the multicomponent powder
3-150kg/m
3Ultra-fine carbonate rock powder, all the other are cement and mineral admixture, form consolidating material by cement and mineral admixture, cement shared weight percent in consolidating material is 20%-100%.
Above-mentioned cement shared weight percent in consolidating material is preferably 25%-60%.
Above-mentioned ultra-fine carbonate rock powder be by carbonatite through broken, levigate forming, used carbonatite is with calcite, rhombspar or above-mentioned two kinds of rocks that ore is the essential mineral composition.
Above-mentioned ultra-fine carbonate rock powder has specific fineness, adopts the test of laser diffractometry particles distribution instrument, and its particle size distribution parameter should satisfy following requirement: ultra-fine carbonate rock powder particle size distribution parameter D (50) should≤4.5 microns, D (90) should≤25 microns.
Ultra-fine carbonate rock powder particle size distribution parameter D (50)≤3.5 micron preferably, D (90)≤12 micron.
Best ultra-fine carbonate rock powder particle size distribution parameter D (50)≤2.5 micron, D (90)≤7 micron.
Above-mentioned mineral admixture is mainly one or more the mixture among flyash, GBFS, silicon ash, metakaolin, steel-making slag powder, the phosphorus slag powder.
Above-mentioned admixture can be selected one or more the composite product among polycarboxylic acid series high efficiency water reducing agent, naphthalenesulfonate formaldehyde condensation compound high efficiency water reducing agent, condensate of melamine and formaldehyde high efficiency water reducing agent, sulfamate high-effective water-reducing agent, air entrapment agent, retardant, hardening accelerator, the swelling agent.
The compound method of the above-mentioned concrete composition that contains ultra-fine carbonate rock powder is characterized in that: each component in the multicomponent powder mixed by following proportioning,
Ultra-fine carbonate rock powder accounts for the 12.7%-50% of multicomponent powder total amount, and cement accounts for the 10%-87.3% of multicomponent powder total amount, and mineral admixture accounts for the 0%-69.8% of multicomponent powder total amount; Add admixture, coarse aggregate, fine aggregate, water then and be hybridly prepared into concrete composition.
The optimum mix of each the ingredients constitute multicomponent powder total amount in the above-mentioned multicomponent powder is by weight following:
Ultra-fine carbonate rock powder: 20%-35%; Cement: 19%-60%; Mineral admixture: 15%-61%.
Working mechanism of the present invention: have the following space of a large amount of 5 μ m in cement, the mixed powder packed structures of mineral admixture, belong to the eakiness packed structures, after concrete adds the water stirring, a part of water in the gelling material slurry is attracted to the powder granule surface, another part is filled in the space between the powder granule, is to fill water.After mixing ultra-fine carbonate rock powder in the concrete, powder granularity distributes and is optimized, though ultra-fine carbonate rock powder is low with the reactive behavior of cement, can play filling effect owing to have the superfine fineness.After concrete is mixed high efficiency water reducing agent, cement, mineral admixture, ultra-fine carbonate rock powder particle are fully disperseed in the whipping process, ultra-fine carbonate rock powder is particles filled in cement and the intergranular hole of mineral admixture, make tightly packed effect takes place between the powder granule, the accumulation degree of compactness of mixed system increases, can fill the space and reduce, water requirement reduces.Therefore under the situation that keeps the rheological property of concrete unanimity, can significantly reduce the concrete water amount, thereby can improve the concrete hole structure after the sclerosis, make concrete inner structure more closely knit.Owing to can reduce water consumption in a large number after mixing ultra-fine carbonate rock powder, therefore can reduce water-cement ratio, improve concrete strength, compare with the concrete of not mixing ultra-fine hydrochloride rock dust with strength grade, can significantly reduce cement consumption, play and reduce the concrete hydrating temperature rise, reduce to shrink, improve impervious effect.
The present invention compares the beneficial effect that has with existing conventional art: the ultra-fine carbonate rock powder of the present invention's admixture suitable proportion in concrete, can make high-performance, concrete cheaply, and the powder body material amount ranges is 300kg/m in every cubic meter of concrete
3-550kg/m
3, wherein contain 70kg/m
3-150kg/m
3During ultra-fine carbonate rock powder, can play significant filling, water-reducing effect, can prepare high performance concrete, and can make concrete obtain ultralow perviousness.This concrete cooperates high efficiency water reducing agent and mineral admixture, and place of cement further reduce water consumption in a large number, have significantly improved concrete intensity, degree of compactness and anti-permeability performance, belong to high performance concrete.The concrete of admixture ultra-fine carbonate rock powder preparation is compared with the concrete of singly mixing mineral admixture, has reduced cement consumption by a larger margin, has reduced concrete cost.Because ultra-fine carbonate rock powder has grindability; it is lower to be processed into the ultra-fine carbonate rock powder energy consumption; and can utilize limestone and dolomitic mine tailing processing ultra-fine carbonate rock powder, therefore economizing on resources and the energy, protecting and have more far-reaching function and significance aspect the environment.
The present invention adopts ultra-fine carbonate rock powder and cement and mineral admixture to form multicomponent powder, improved the size-grade distribution of powder, make powder produce the dense accumulation effect, bring significant water-reducing effect, required mixing water amount significantly reduces under workability of concrete the same terms keeping, when keeping identical water-cement ratio, the agglutination material consumption declines to a great extent thereupon.According to said method the agglutination material consumption reduces in Pei Zhi the concrete, and ultra-fine carbonate rock powder satisfies the required slurry total amount of preparation good quality concrete as a supplement fully.According to said method Pei Zhi the ultra-fine carbonate rock powder concrete advantage that contains is, keeps under serviceability and the strength grade same case, and cement consumption significantly reduces, and the concrete hydrating temperature rise reduces, contraction reduces, and cost is low, and energy-conserving and environment-protective.
Prepared the mass concrete of low hydration heat requirement in the past, also have and use levigate limestone powder in order to reduce the example of concrete hydrating temperature rise, but the levigate limestone powder that is adopted not is a ultrafine powder, but approaching with cement fineness, does not have significant water-reduction.The present invention finds this class carbonatite is milled to ultra-fine, mix concrete by certain volume after, can improve that powder granularity distributes in the concrete, produce the effect of significant diminishing.The remarkable diminishing feature that is had of the ultra-fine carbonate rock powder that the present invention found has been described by following test (seeing Table 1).Cement, stone flour, water and high-efficiency water-reducing agent of poly-carboxylic acid are together stirred into clean slurry, measure clean slurry degree of mobilization, when reaching equal clean slurry degree of mobilization value, the slurry water consumption of mixing ultra-fine stone flour obviously reduces.
Table 1 clean slurry proportioning and degree of mobilization value
The high efficiency water reducing agent effect is very crucial among the present invention, should select for use and disperse and the good high efficiency water reducing agent of water-reducing effect.Can adopt any or two or more compound products in naphthalenesulfonate formaldehyde condensation compound high efficiency water reducing agent, condensate of melamine and formaldehyde high efficiency water reducing agent, sulfamate high-effective water-reducing agent, the polycarboxylic acid series high efficiency water reducing agent.Wherein optimal is polycarboxylic acid series high efficiency water reducing agent.The high efficiency water reducing agent volume that should reach capacity in the concrete, guaranteeing that powder granule is fully disperseed, but the high efficiency water reducing agent volume can not be too much in order to avoid cause bleeding and segregation.Simultaneously, ultra-fine carbonate rock powder also can play the effect that reduces bleeding.The present invention can also other admixture of compound use in addition, as: air entrapment agent, retardant, hardening accelerator, swelling agent etc.
Behind admixture ultra-fine carbonate rock powder of the present invention and the high efficiency water reducing agent, under extremely low water consumption, the activity of mineral admixture is more given full play to, and enhancement is more remarkable.The mineral admixture that is adopted can be that one or more mixing among flyash, ground slag, silicon ash, metakaolin, steel-making slag powder, the phosphorus slag powder are used, and wherein preferably uses ground slag and flyash.During concrete batching, the shared weight ratio of each composition material is best when following scope in the powder body material, and promptly cement accounts for that 19%-50%, mineral admixture account for 15%-61%, ultra-fine carbonate rock powder accounts for 20%-35% in the powder body material.Wherein cement in consolidating material shared weight ratio for being preferably 25%-60%.
When the present invention adopts ventilative specific surface area 350m
2/ kg is above levigate when making adulterant, because the ground slag activity is higher, is keeping under the equality strength condition, at most alternative 75% cement.The cement used when concrete batching is identical with the slag summation, and when cement and ground slag ratio changed in the 100:0-25:75 scope, 28 days ultimate compression strength of concrete can keep basic identical.
It is also better that the present invention mixes the flyash effect.Flyash has volcanic ash, can with the calcium hydroxide deferred reaction that generates in the cement hydration process, generate stable compounds such as Calucium Silicate powder, the major advantage of flyash is: (1) fly ash grain is smooth, spherical more, helps improving workability of concrete; (2) later strength be can improve, impermeability and chemical resistance improved; (3) reduce hydration heat of concrete, prevent thermal cracking; (4) suppress alkali-aggregate reaction.In addition, because the reactive behavior of flyash is little, particularly when the concrete of preparation good fluidity, the place of cement amount is unsuitable excessive, otherwise can cause that concrete coagulation postpones, and strength development is slow.When the present invention prepares plastic concrete,, better with the flyash effect of big volume because the concrete water amount is lower.
Flyash mixes use with ground slag can reach good effect, helps bringing into play two kinds of adulterants advantage separately.
The present invention's powder body material amount ranges in every cubic meter of concrete is 300kg/m
3-550kg/m
3, wherein contain 70kg/m
3-150kg/m
3During ultra-fine carbonate rock powder, can play significant filling, water-reducing effect, can prepare high-quality concrete, and can make concrete obtain ultralow perviousness.
Because concrete unit consumption of water of the present invention is very low, therefore use less cement also can make the concrete high-strength, that superelevation is strong at an easy rate, low cement content can effectively suppress hydration heat, and thermal insulation warming is significantly reduced.
The present invention's preparation is suitable for preparing self-compacting concrete, behind the admixture ultra-fine carbonate rock powder, the powder body material size distribution is optimized, can make concrete obtain high flowability with less water consumption, add that thick, fine aggregate grating is after optimizing, the shared volume ratio of water and powder body material reduces in every cubic meter of concrete, helps reducing concrete shrinkage and creeps.
The present invention can make and be fit to multi-purpose concrete, as: be used for pumping construction Cracking of High Flowing Concrete, satisfy mass concrete, the plastic concrete that is used for prefabricated components production that low hydration heat requires, be used for harbour and oceanographic engineering high durability concrete and high-strength, super high strength concrete, self-compacting concrete etc.
(4) description of drawings
Fig. 1 is that the present invention prepares self-compacting concrete is compared minimizing powder body material and water consumption with traditional method result schematic diagram;
Fig. 2 is that one embodiment of the invention is compared the significantly reduced trial curve figure of thermal insulation warming with conventional concrete;
Fig. 3 is that another embodiment of the present invention is compared the significantly reduced trial curve figure of thermal insulation warming with conventional concrete.
(5) embodiment
The present invention is a kind of concrete composition that contains ultra-fine carbonate rock powder, it is characterized in that the levigate ultra-fine carbonate rock powder that is processed into of carbonatite, adopt ultra-fine carbonate rock powder to make concrete composition, the composition material of this concrete composition has: the multicomponent powder of forming by cement, mineral admixture and ultra-fine carbonate rock powder, and based on the admixture of high efficiency water reducing agent, thick, fine aggregate and water.The shared weight ratio of each composition material is in this multicomponent powder: ultra-fine carbonate rock powder 12.7%-50%, cement 10%-87.5%, mineral admixture 0%-69.8%; Wherein the shared weight ratio of each composition material is preferably in the multicomponent powder: ultra-fine carbonate rock powder 20%-35%, cement 19%-50%, mineral admixture 15%-61%.The powder body material amount ranges is 300kg/m in every cubic meter of concrete
3-550kg/m
3, wherein contain 70kg/m
3-150kg/m
3During ultra-fine carbonate rock powder, can play significant filling, water-reducing effect, can prepare high performance concrete, make concrete obtain ultralow perviousness.
Above-mentioned ultra-fine carbonate rock powder is to adopt carbonatite through broken, levigate forming, the contained main carbonate minerals of used carbonatite be calcite and (or) rhombspar, be quartz, mica, feldspar and clay mineral etc. secondly.Its chemical ingredients is mainly CaO, MgO and CO
2, be SiO secondly
2, TiO
2, FeO, Fe
2O
3, Al
2O
3, K
2O, Na
2O, H
2O and some trace element.The most frequently used carbonatite is limestone, this two big rock type of dolomite, and by the rotten marble that forms of this rocks and ferrodolomite, magnesite etc.Lime rock mainly is made up of calcite, is rhombspar, magnesite, quartz, feldspar and clay mineral etc. secondly.The dolomite class mainly is made up of rhombspar, is calcite, magnesite, quartz, feldspar, clay mineral etc. secondly.Particularly, the mine tailing that produces in industrial limestone and the dolomite ore extraction process also can be used to process ultra-fine carbonate rock powder, and is significant to comprehensive utilization of resources and environmental protection.
Ultra-fine carbonate rock powder have than cement and except that silica flour the commonly used thinner fineness of mineral admixture, in order to improve the size-grade distribution of powder body material in the concrete, improve packing density of particle, reach the purpose that reduces water consumption.Carbonatite is easy to levigate, and the energy consumption of grinding is lower when reaching fineness required for the present invention, can adopt processing such as ball mill, vertical roll grinder, vibration mill, Raymond mill.Satisfy the particle size distribution parameter of ultra-fine carbonate rock powder required for the present invention, adopt the test of laser diffractometry particles distribution instrument, its particle size distribution parameter D (50) should≤4.5 microns, D (90) should≤25 microns.Ultra-fine carbonate rock powder particle size distribution parameter D (50)≤3.5 micron preferably, D (90)≤12 micron.Best ultra-fine carbonate rock powder particle size distribution parameter D (50)≤2.5 micron, D (90)≤7 micron.Thinner ultra-fine carbonate rock powder, when particle size distribution parameter D (50)≤1.5 micron, D (90)≤5 micron, further the improvement effect is not obvious to concrete performance, and can increase the grinding energy consumption, increases cost.
The used cement of the present invention can be: various silicate cements such as ordinary Portland cement, silicate cement, quick hardening Portland cement, moderate-heat portland cement, sulfate resisting Portland cement, Portland blast, Portland pozzolana cement, Portland fly ash cement, white portland cement, effect for better performance adulterant and ultra-fine carbonate rock powder, improve the development of concrete initial stage and later strength, the most handy ordinary Portland cement or silicate cement.
The used fine aggregate of the present invention can be natural sand or artificial sand, and wherein, artificial sand comprises machine-processed sand and the mixed sand that is mixed by natural sand and machine-processed sand, and coarse aggregate can be rubble or cobble.
Admixture used in the present invention should have good dispersion and water-reducing effect, can adopt one or more the composite products among naphthalenesulfonate formaldehyde condensation compound high efficiency water reducing agent, condensate of melamine and formaldehyde high efficiency water reducing agent, sulfamate high-effective water-reducing agent, the polycarboxylic acid series high efficiency water reducing agent.Preferably adopt polycarboxylic acid series high efficiency water reducing agent.In addition can other admixture of compound use, as: air entrapment agent, retardant, hardening accelerator, swelling agent etc.
Enriched concrete mixing proportion design method and rule that practical experience forms for the basis, the concrete that contains ultra-fine carbonate rock powder for the present invention's preparation remains suitable in the past.The concrete mix that the present invention contains ultra-fine carbonate rock powder calculates, and equals the rule of the closely knit volume sum of water, cement, mineral admixture, ultra-fine carbonate rock powder, sand, stone according to the fresh concrete cumulative volume.Proportioning determination method for parameter such as unit consumption of water, unit powder body material consumption, water-cement ratio, aggregate consumption are the same with common concrete design.Concrete intensity depends on water-cement ratio, determines its water-cement ratio according to the strength grade of institute's concrete batching.Under the situation about fix at water-cement ratio, starting material are certain, use the minimum slurry consumption that satisfies the workability requirement, to obtain the concrete of volume stability, economy as far as possible.In addition, for reducing concrete temperature rise, improving concrete durability, under the prerequisite that satisfies the concrete strength requirement, reduce the consumption of cement in the gelling material as far as possible.
Contain the consolidating material of being made up of cement and mineral admixture in the concrete composition of the present invention, cement shared weight ratio in consolidating material is 20%-100%; Wherein cement in consolidating material shared weight ratio for being preferably 25%-60%.The above-mentioned preparation strength that contains the concrete composition of ultra-fine carbonate rock powder depends on water-cement ratio, i.e. the ratio of water and consolidating material, and the low more concrete strength of preparing of water-cement ratio is high more.Consolidating material comprises cement and mineral admixture.The mineral admixture that the present invention adopts can select one or more mixing among flyash, ground slag, silicon ash, metakaolin, steel-making slag powder, the phosphorus slag powder to use.Preferably use ground slag and flyash among the present invention, use or mixing result of use are all fine separately, and cost is low.
The above-mentioned concrete composition that contains ultra-fine carbonate rock powder is when the mineral admixture that is adopted is ground slag.Can be in certain volume scope, with the ventilative specific surface area 350m of Bo Shi
2/ kg-850m
2The ground slag equivalent substitution cement of/kg can make concrete keep equality strength.When, cement identical with the slag summation when the used cement of concrete batching and ground slag ratio changed in the 100:0-25:75 scope, 28 days ultimate compression strength of concrete was suitable substantially.
Concrete of the present invention is suitable for adopting forced mixer to stir, and when adopting high-efficiency water-reducing agent of poly-carboxylic acid, the concrete churning time is wanted proper extension.The present invention does not have particular restriction in proper order to the interpolation of each moiety of concrete.
It below is the embodiment of the invention.Embodiment does not limit scope of invention.Embodiments of the invention 1:
According to the concrete mix shown in following starting material and the table 3, concrete batching is measured ultimate compression strength.Mix01-Mix06 is the embodiment proportioning in the table 3, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement and ground slag respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 20%-37% of powder body material total amount in the concrete.Mix07-Mix12 is the comparative example proportioning in the table 3, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement: the prosperous ordinary Portland cement P.O 42.5 of Luquan ancient cooking vessel;
Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg;
Sand: medium sand;
Rubble: 5-20mm rubble;
High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid;
Ultra-fine carbonate rock powder: through broken, levigate forming, its chemical ingredients sees Table 2 with area, Mentougou, Beijing limestone tailing, and its powder degree distribution parameter D (50) is 3.13 microns, and D (90) is 8.35 microns.
Table 2 ultra-fine carbonate rock powder divides chemical component list
| Composition | CaO | MgO | K 2O | Na 2O | SiO 2 | Al 2O 3 | Fe 2O 3 | Loss on ignition |
| Content (%) | 45.74 | 2.59 | 1.19 | 0.25 | 6.52 | 3.04 | 0.82 | 39.58 |
(2), test method:
Concrete slump is adjusted into 200-230mm, is 180 seconds with the forced mixer churning time.Ultimate compression strength is pressed the GB/T50081 standard implementation.Curing condition is that 20 ℃ of temperature, relative humidity are more than 95%.
Table 3 concrete mix (kg/m
3)
Table 4 compressive strength test result
(3), test-results
Test situation from table 3, table 4, the concrete serviceability of embodiment of the invention Mix01-Mix06 is fine, reduces with the increase of agglutination material consumption, water-cement ratio, and concrete strength improves thereupon.Compare with the concrete with strength grade among the comparative example Mix07-Mix12, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 2: according to the concrete mix concrete batching shown in following starting material and the table 5, measure ultimate compression strength.Mix13-Mix17 is the embodiment proportioning in the table 5, with cement, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement and flyash respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 28%-29% of powder body material content in the concrete.Mix18-Mix22 is the comparative example proportioning in the table 5, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Mineral admixture: the flyash that adopts Shijingshan, Beijing heat power plant; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid.
(2), test method is with embodiment 1.
Table 5 concrete mix (kg/m
3)
Table 6 compressive strength test result
(3), test-results
Test situation from table 5, table 6, the concrete serviceability of embodiment of the invention Mix13-Mix17 is fine, reduces with the increase of agglutination material consumption, water-cement ratio, and concrete strength improves thereupon.Compare with the concrete with strength grade among the comparative example Mix18-Mix22, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 3: according to the concrete mix concrete batching shown in following starting material and the table 7, measure ultimate compression strength.The Mix23-Mix26 proportioning is embodiment in the table 7, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture naphthalene series high-efficiency water-reducing agent.Cement and ground slag respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 28%-37% of powder body material content in the concrete.The Mix27-Mix29 proportioning is a comparative example in the table 7, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; High efficiency water reducing agent: Tianjin Yong Yang UNF-5 naphthalene series high-efficiency water-reducing agent.
(2), test method is with embodiment 1.With the forced mixer churning time is 150 seconds.
Table 7 concrete mix (kg/m
3)
Table 8 compressive strength test result
(3), test-results
Test situation from table 7, table 8, the concrete serviceability of embodiment of the invention Mix23-Mix26 is fine, reduces with the increase of agglutination material consumption, water-cement ratio, and concrete strength improves thereupon.Compare with the concrete with strength grade among the comparative example Mix27-Mix29, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 4: according to the concrete mix concrete batching shown in following starting material and the table 9, measure ultimate compression strength.The Mix30-Mix33 proportioning is embodiment in the table 9, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement is identical with the ground slag consumption in each proportioning of embodiment, flyash consumption 60kg/m in every cubic meter of concrete
3-80kg/m
3, ultra-fine carbonate rock powder accounts for the 20%-26% of powder body material content in the concrete.The Mix34-Mix37 proportioning is a comparative example in the table 9, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid.
(2), test method:
Concrete slump is adjusted into 200-230mm, is 180 seconds with the forced mixer churning time.Ultimate compression strength is pressed the GB/T50081 standard implementation.Curing condition is that 20 ℃ of temperature, relative humidity are more than 95%.
Table 9 concrete mix (kg/m
3)
Table 10 compressive strength test result
(3), test-results
Test situation from table 9, table 10, the concrete serviceability of embodiment of the invention Mix30-Mix33 is fine, reduces with the increase of agglutination material consumption, water-cement ratio, and concrete strength improves thereupon.Compare with the concrete with strength grade among the comparative example Mix34-Mix37, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 5: according to the concrete mix concrete batching shown in following starting material and the table 11, measure ultimate compression strength.The Mix38-Mix44 proportioning is embodiment in the table 11, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement and ground slag add up to 195kg/m in the Mix38-Mix40 proportioning
3, cement and ground slag weight is only than being changed by 3.6:6.5-6:4, and ultra-fine carbonate rock powder accounts for 26% of powder body material content in the concrete; Cement and ground slag add up to 220kg/m in the Mix41-Mix44 proportioning
3, cement and ground slag weight is only than being changed by 3:7-6:4, and ultra-fine carbonate rock powder accounts for 37% of powder body material content in the concrete.The Mix45-Mix46 proportioning is a comparative example in the table 11, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; High efficiency water reducing agent: Bath good fortune chemical building material GleniumAce68 high-efficiency water-reducing agent of poly-carboxylic acid; Mineral admixture: the ground slag that Beijing Capital Iron and Steel produces, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; Also adopt the flyash of Shijingshan, Beijing heat power plant.
(2), test method is with embodiment 1.
Table 11 concrete mix (kg/m
3)
Table 12 compressive strength test result
(3), test-results
Test situation from table 11, table 12, the concrete serviceability of embodiment of the invention Mix38-Mix44 is fine.Identical, the cement of agglutination material consumption equates with the ground slag total amount in the Mix38-Mix40 proportioning, the ratio of cement and ground slag weight between 3.5:6.5-6.5:3.5 in during variation, 28 days ultimate compression strength of concrete is basic identical.Identical, the cement of agglutination material consumption equates with the ground slag total amount in the Mix41-Mix55 proportioning, the ratio of cement and ground slag weight between 3:7-6:4 in during variation, 28 days ultimate compression strength of concrete is basic identical.Compare with comparative example Mix45, Mix46, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 6: according to the concrete mix shown in following starting material and the table 13, concrete batching is measured ultimate compression strength.The Mix47-Mix50 proportioning is embodiment in the table 13, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture naphthalene series high-efficiency water-reducing agent.Cement is identical with the ground slag consumption in each proportioning of embodiment, flyash consumption 20kg/m in every cubic meter of concrete
3-60kg/m
3, ultra-fine carbonate rock powder accounts for the 24%-28% of powder body material content in the concrete.The Mix51-Mix53 proportioning is a comparative example in the table 13, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; High efficiency water reducing agent: Tianjin Yong Yang UNF-5 naphthalene series high-efficiency water-reducing agent; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant.
(2), test method is with embodiment 1.With the forced mixer churning time is 150 seconds.
Table 13 concrete mix (kg/m
3)
Table 14 compressive strength test result
(3), test-results
Test situation from table 13, table 14, the concrete serviceability of embodiment of the invention Mix47-Mix50 is fine, reduces with the increase of agglutination material consumption, water-cement ratio, and concrete strength improves thereupon.Compare with the concrete with strength grade among the comparative example Mix51-Mix53, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 7: according to the concrete mix concrete batching shown in following starting material and the table 15, measure ultimate compression strength.The Mix54-Mix57 proportioning is embodiment in the table 15, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture naphthalene series high-efficiency water-reducing agent.Mix54-Mix57 proportioning concrete cost basically identical, cement consumption is by 110kg/m
3-70kg/m
3Successively decrease, and cement+ground slag sum is by 220kg/m
3-240kg/m
3Increase progressively, the agglutination material total amount is all 370kg/m
3, ultra-fine carbonate rock powder accounts for 27% of powder body material content in the concrete.The Mix58 proportioning is a comparative example in the table 15, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; High efficiency water reducing agent: Tianjin Yong Yang UNF-5 naphthalene series high-efficiency water-reducing agent; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant.
(2), test method:
With the forced mixer churning time is 150 seconds, and all the other are with embodiment 1.
Table 15 concrete mix (kg/m
3)
Table 16 compressive strength test result
(3), test-results
Test situation from table 15, table 16, the concrete serviceability of embodiment of the invention Mix54-Mix57 is fine.Under agglutination material and the powder body material consumption same case, adding the ground slag sum with cement increases in concrete, and concrete later stage ultimate compression strength improves thereupon.Compare with comparative example Mix58 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 8: according to the concrete mix concrete batching shown in following starting material and the table 17, measure ultimate compression strength.The Mix59-Mix62 proportioning is embodiment in the table 17, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Mix59-Mix62 proportioning concrete cost basically identical, cement consumption is by 160kg/m
3-95kg/m
3Successively decrease, and cement+ground slag sum is by 320kg/m
3-355kg/m
3Increase progressively, the agglutination material total amount is all 400kg/m
3, ultra-fine carbonate rock powder accounts for 20% of powder body material content in the concrete.Mix63, Mix64 proportioning are comparative example in the table 17, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; High efficiency water reducing agent: Bath good fortune chemical building material GleniumAce68 high-efficiency water-reducing agent of poly-carboxylic acid; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant.
(2), test method is with embodiment 1.
Table 17 concrete mix (kg/m
2)
Table 18 compressive strength test result
(3), test-results
Test situation from table 17, table 18, the concrete serviceability of embodiment of the invention Mix59-Mix62 is fine.Under agglutination material and the powder body material consumption same case, adding the ground slag sum with cement increases in concrete, and concrete crushing strength improves thereupon.Compare with comparative example Mix63, Mix64 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 9: according to the concrete mix shown in starting material shown in the table 19 and the table 20, the preparation self-compacting concrete is measured serviceability and ultimate compression strength.Mix A-Mix C proportioning is embodiment in the table 20, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Mix E, Mix F proportioning are comparative example in the table 20, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Table 19 materials statement
| Title material | The place of production | Density | Bo Shi method specific surface area (m 2/kg) |
| Rubble 5-20mm | The permanent female peak quarrying company limited that opens up in Beijing | 2.7g/cm 3 | ------- |
| Rubble 5-10mm | The permanent female peak quarrying company limited that opens up in Beijing | 2.7g/cm 3 | ------- |
| Mechanism sand | Medium sand, the permanent female peak quarrying company limited that opens up in Beijing | 2.7g/cm 3 | ------- |
| Cement | The prosperous P.O42.5 cement of Hebei Luquan ancient cooking vessel | 3.1g/cm 3 | 330 |
| Flyash | Shijingshan, Beijing heat power plant | 2.2g/cm 3 | ------- |
| Ground slag | Beijing Capital Iron and Steel praises Huajian material company limited | 2.9g/cm 3 | 430 |
| Levigate carbonate rock powder | The permanent female peak quarrying company limited that opens up in Beijing | 2.7g/cm 3 | ------- |
| GLENIUM?ACE68 | High-efficiency water-reducing agent of poly-carboxylic acid, Bath good fortune chemical building material (solid content 45%) | ------- | -------- |
(2), test method:
Concrete slump is adjusted into 240-260mm, and the degree of expansion that collapses is adjusted into more than the 650mm, and all the other are with embodiment one.Table 20 concrete mix (kg/m
3)
Table 21 test-results
(3), test-results
Referring to Fig. 1, the concrete serviceability excellence of embodiment of the invention Mix A-Mix C, compare with comparative example Mix E, MixF concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly, the shared volume ratio of water and powder body material reduces in every cubic meter of concrete, helps reducing concrete shrinkage and creeps.
Embodiment 10: according to the concrete mix shown in following starting material and the table 22, concrete batching is measured ultimate compression strength.The Mix65-Mix69 proportioning is embodiment in the table 22, the admixture high-efficiency water-reducing agent of poly-carboxylic acid, with cement, ground slag, flyash and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, the powder body material consumption is identical in the above-mentioned proportioning, but cement, ground slag, flyash and ultra-fine carbonate rock powder therein proportion have nothing in common with each other.The Mix70 proportioning is a comparative example in the table 22, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Ground slag: Beijing Capital Iron and Steel produces, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; Mineral admixture: the flyash that adopts Shijingshan, Beijing heat power plant; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid.
(2), test method is with embodiment 1.
Table 22 concrete mix (kg/m
3)
Table 23 compressive strength test result
(3), test-results
Test situation from table 22, table 23, the concrete serviceability of embodiment of the invention Mix65-Mix69 is fine.Above-mentioned proportioning is identical at the powder body material consumption, and cement, ground slag, flyash and ultra-fine carbonate rock powder proportion have nothing in common with each other under the situation, and 28 days ultimate compression strength of concrete is roughly the same.Compare with comparative example Mix70 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 11: according to the concrete mix shown in following starting material and the table 24, the preparation plastic concrete is measured ultimate compression strength.The Mix71-Mix74 proportioning is embodiment in the table 24, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement and ground slag respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 20%-37% of powder body material content in the concrete.The Mix75-Mix78 proportioning is a comparative example in the table 24, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Mineral admixture: the flyash that adopts Shijingshan, Beijing heat power plant; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid.
(2), test method:
Concrete slump is adjusted into 80-120mm, is 200 seconds with the forced mixer churning time, and all the other are with embodiment 1.
Table 24 concrete mix (kg/m
3)
The anti-strength trial result of table 25
(3), test-results
Test situation from table 24, table 25, a large amount of adding coal ashes of embodiment of the invention Mix71-Mix74, because the plastic concrete water consumption is still less, concrete has still reached higher intensity.Compare with comparative example Mix75-Mix78 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly.
Embodiment 12: according to the concrete mix shown in following starting material and the table 27, prepare high-strength, super high strength concrete.The Mix79-Mix81 proportioning is embodiment in the table 27, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture naphthalene series high-efficiency water-reducing agent.Cement and ground slag respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 20%-37% of powder body material content in the concrete.Mix82, Mix83 proportioning are comparative example in the table 27, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble: with embodiment 1; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid; Ultra-fine carbonate rock powder: Mentougou, Beijing area fat lime stone, its chemical ingredients sees Table 26, and particle size distribution parameter D (50) is that 2.05 microns, D (90) are 5.28 microns.
Table 26 chemical ingredients
| Composition | CaO | MgO | K 2O | Na 2O | SiO 2 | Al 2O 3 | Fe 2O 3 | Loss on ignition |
| Content (%) | 53.67 | 0.31 | 0.15 | ------ | 1.67 | 0.45 | 0.15 | 42.85 |
(2), test method is 240 seconds with the forced mixer churning time, with embodiment 1.
Table 27 concrete mix (kg/m
3)
Table 28 compressive strength test result
(3), test-results
Test situation from table 27, table 28, embodiment of the invention Mix79-Mix81 concrete mix unit cement consumption only are 230kg/m
3-255kg/m
3, 28 days ultimate compression strength of concrete all reaches the above superstrength of 100MPa.Compare with comparative example Mix83, Mix84 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption significantly reduces, and cement consumption reduces 49%-54%.
Embodiment 13: according to the concrete mix shown in following starting material and the table 29, and the concrete of preparation low hydration heat.Mix84, Mix85 proportioning are embodiment in the table 29, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement and ground slag respectively account for 50% in the consolidating material; Ultra-fine carbonate rock powder accounts for the 20%-37% of powder body material content in the concrete.Mix86, Mix87 proportioning are comparative example in the table 29, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; Mineral admixture: the ground slag that Beijing Capital Iron and Steel produces, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid.
(2), test method is with embodiment 1.The DL/T5150-2001 standard implementation is pressed in the test of concrete thermal insulation warming.
Table 29 concrete mix (kg/m
3)
(3), test-results
Test situation from table 29, Fig. 2, Fig. 3, with the embodiment Mix84 concrete of strength grade compare with comparative example Mix86 concrete, embodiment Mix85 concrete compares thermal insulation warming with comparative example Mix87 concrete and significantly reduces.Aquation temperature rise when mixing ultra-fine carbonate rock powder and helping reducing mass concrete construction.
Embodiment 14: mix ultra-fine carbonate rock powder and can configure and have ultralow infiltrative concrete, according to material shown in following and the concrete mix shown in the table 30, concrete batching is measured chloride ion permeability.Proportioning Mix88-Mix26 is embodiment in the table 30, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture polycarboxylate water-reducer.Proportioning Mix27-Mix29 is a comparative example in the table 30, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement, sand, rubble, ultra-fine carbonate rock powder: with embodiment 1; High efficiency water reducing agent: Bath good fortune chemical building material GleniumAce68 high-efficiency water-reducing agent of poly-carboxylic acid, Tianjin Yong Yang UNF-5 naphthalene series high-efficiency water-reducing agent; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; The flyash of Shijingshan, Beijing heat power plant.
(2), test method:
With embodiment 1.Pressing ASTM C1202-05 " the displacement flux judgement criteria of concrete resistance of chloride ion penetration " detects.
Table 30 concrete mix (kg/m
3)
(3), test-results
Test situation from table 30, table 32, embodiment of the invention Mix88-Mix91 strength grade of concrete difference detects their Cl
-The infiltration displacement flux is all very low.Compare with comparative example Mix92, Mix93 concrete, behind the admixture ultra-fine carbonate rock powder, concrete water consumption and cement consumption reduce significantly, anti-Cl
-Penetrating quality significantly improves.
Table 31 ASTM C1202-05 standard-required
Table 32 test-results
| Cooperate colon | Cl -Infiltration displacement flux (coulomb) | Remarks |
| Mix?88 | 238.8 | The embodiment of the invention |
| Mix?89 | 234.9 | The embodiment of the invention |
| Mix?90 | 223.2 | The embodiment of the invention |
| Mix?91 | 941.1 | Comparative example |
| Mix?92 | 1487.8 | Comparative example |
Embodiment 15: according to the concrete mix shown in following starting material and the table 34, concrete batching is measured ultimate compression strength.Mix93-Mix96 is the embodiment proportioning in the table 34, with cement, ground slag and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.Cement accounts for the 20%-63% of multicomponent powder total amount in the concrete, and ground slag respectively accounts for 0%-43%; The processing ultra-fine carbonate rock powder is raw materials used to be rhombspar, and ultra-fine carbonate rock powder accounts for 37% of multicomponent powder total amount, and each proportioning cement is identical with the ground slag sum among the embodiment.Mix97-Mix98 is the comparative example proportioning in the table 34, not the admixture ultra-fine carbonate rock powder.
(1), starting material:
Cement: the prosperous ordinary Portland cement P.O 42.5 of Luquan ancient cooking vessel; Mineral admixture: the ground slag that adopts Beijing Capital Iron and Steel to produce, proportion 2.9, fineness ratio surface-area: 400m
2/ kg; Sand: medium sand; Rubble: 5-20mm rubble; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid; Ultra-fine carbonate rock powder: through broken, levigate forming, its chemical ingredients sees Table 33 with Fangshan District, Beijing rhombspar, and its powder degree distribution parameter D (50) is 3.13 microns, and D (90) is 8.35 microns.
Table 33 ultra-fine carbonate rock powder divides chemical component list
| Composition | MgO | CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | K 2O | Na 2O | P | S |
| Content (%) | 21.35 | 30.02 | 0.66 | 0.08 | 0.18 | 0.31 | 0.01 | 0.05 | 0.06 |
(2), test method is with embodiment 1.
Table 34 concrete mix (kg/m
3)
Table 35 compressive strength test result
(3), test-results
Test situation from table 34, table 35, the concrete serviceability of embodiment of the invention Mix93-Mix96 is fine, under each proportioning cement and slag sum the same terms, cement and ground slag ratio change, 28 days ultimate compression strength of concrete is roughly the same, but concrete is early stage and the later strength development is different.Compare with comparative example Mix97-Mix98 concrete, behind the ultra-fine carbonate rock powder of admixture by rhombspar processing, concrete water consumption and cement consumption reduce significantly.
Embodiment 16: adopt different varieties mineral admixture preparation ultra-fine carbonate rock powder concrete.According to the concrete mix shown in following starting material and the table 36, concrete batching is measured ultimate compression strength.With cement, various mineral admixture and the ultra-fine carbonate rock powder powder that comes from different backgrounds and possess different abilities, admixture high-efficiency water-reducing agent of poly-carboxylic acid.The processing ultra-fine carbonate rock powder is raw materials used to be rhombspar, and ultra-fine carbonate rock powder accounts for 37% of multicomponent powder total amount.
(1), starting material:
Cement: the prosperous ordinary Portland cement P.O 42.5 of Luquan ancient cooking vessel; Steel-making slag powder: Beijing Capital Iron and Steel produces steel-making slag powder, fineness ratio surface-area 390m
2/ kg; Metakaolin: kaolin is produced in Shanxi, and is levigate to fineness ratio surface-area 400m after 700 ℃～800 ℃ calcinings
2/ kg; Silica flour: dust is agree SILICA FUME; Sand: medium sand; Rubble: 5-20mm rubble; High efficiency water reducing agent: Bath good fortune chemical building material Glenium Ace68 high-efficiency water-reducing agent of poly-carboxylic acid; Ultra-fine carbonate rock powder: form with rhombspar is levigate, with embodiment 15.
(2), test method is with embodiment 1.
Table 36 concrete mix (kg/m
3)
Table 37 compressive strength test result
Claims (8)
- [claim 1] a kind of concrete composition that contains ultra-fine carbonate rock powder, it is characterized in that: concrete composition is formed by multicomponent powder, high efficiency water reducing agent, coarse aggregate, fine aggregate, water mixed preparing, and the multicomponent powder amount ranges is 300kg/m in every cubic meter of concrete 3-550kg/m 3, contain 70kg/m in the multicomponent powder 3-150kg/m 3Ultra-fine carbonate rock powder, all the other are cement and mineral admixture, form consolidating material by cement and mineral admixture, cement shared weight percent in consolidating material is 20%-100%;Above-mentioned ultra-fine carbonate rock powder be by carbonatite through broken, levigate forming, used carbonatite is with calcite, rhombspar or above-mentioned two kinds of rocks that ore is the essential mineral composition;Above-mentioned ultra-fine carbonate rock powder has specific fineness, adopt the test of laser diffractometry particles distribution instrument, its particle size distribution parameter should satisfy following requirement: ultra-fine carbonate rock powder particle size distribution parameter D (50) is that 1.06～4.22 microns, D (90) are 1.95～12.25 microns;Above-mentioned mineral admixture is mainly one or more the mixture among flyash, GBFS, silicon ash, metakaolin, steel-making slag powder, the phosphorus slag powder;Above-mentioned high efficiency water reducing agent is a kind of of polycarboxylic acid series high efficiency water reducing agent, naphthalenesulfonate formaldehyde condensation compound high efficiency water reducing agent, condensate of melamine and formaldehyde high efficiency water reducing agent, sulfamate high-effective water-reducing agent;Each component in the multicomponent powder mixes by following proportioning, and ultra-fine carbonate rock powder accounts for the 12.7%-50% of multicomponent powder gross weight, and cement accounts for the 10%-87.3% of multicomponent powder gross weight, and mineral admixture accounts for the 0%-69.8% of multicomponent powder gross weight; Add high efficiency water reducing agent, coarse aggregate, fine aggregate and water then and be hybridly prepared into concrete composition.
- [claim 2] concrete composition that contains ultra-fine carbonate rock powder according to claim 1 is characterized in that: the proportioning of each the ingredients constitute multicomponent powder total amount in the above-mentioned multicomponent powder is by weight following:Ultra-fine carbonate rock powder 20%-35%;Cement 19%-60%;Mineral admixture 15%-61%.
- [claim 3] is characterized in that by the described concrete composition that contains ultra-fine carbonate rock powder of claim 1: above-mentioned cement shared weight percent in consolidating material is 25%-60%.
- [claim 4] is characterized in that by claim 1 or the 2 described concrete compositions that contain ultra-fine carbonate rock powder: above-mentioned ultra-fine carbonate rock powder particle size distribution parameter D (50) is that 1.06～3.34 microns, D (90) are 1.95～9.37 microns.
- [claim 5] is characterized in that by claim 1 or the 2 described concrete compositions that contain ultra-fine carbonate rock powder: above-mentioned ultra-fine carbonate rock powder particle size distribution parameter D (50) is that 1.06～2.05 microns, D (90) are 1.95～5.28 microns.
- [claim 6] is characterized in that by claim 1 or the 2 described concrete compositions that contain ultra-fine carbonate rock powder: also have one or more the composite product among air entrapment agent, retardant, hardening accelerator, the swelling agent in the above-mentioned concrete composition.
- [claim 7] a kind of claim 1 or the 2 described compound methods that contain the concrete composition of ultra-fine carbonate rock powder, it is characterized in that: each component in the multicomponent powder is mixed by following proportioning, ultra-fine carbonate rock powder accounts for the 12.7%-50% of multicomponent powder gross weight, cement accounts for the 10%-87.3% of multicomponent powder gross weight, and mineral admixture accounts for the 0%-69.8% of multicomponent powder gross weight; Add high efficiency water reducing agent, coarse aggregate, fine aggregate and water then and be hybridly prepared into concrete composition.
- [claim 8] compound method that contains the concrete composition of ultra-fine carbonate rock powder according to claim 6 is characterized in that: the proportioning of each the ingredients constitute multicomponent powder total amount in the above-mentioned multicomponent powder is by weight following:Ultra-fine carbonate rock powder 20%-35%;Cement 19%-60%;Mineral admixture 15%-61%.
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| CN110183172A (en) * | 2019-05-23 | 2019-08-30 | 华南理工大学 | A kind of concrete preparing the preparation of calcium carbonate superfine powder powder with alkaline residue |
| CN110092625A (en) * | 2019-05-24 | 2019-08-06 | 华南理工大学 | A kind of cement mixed mortar preparing the preparation of calcium carbonate superfine powder powder with alkaline residue |
| CN110563405B (en) * | 2019-09-20 | 2021-09-07 | 成都志达商品混凝土厂 | Environment-friendly admixture concrete and preparation process thereof |
| CN111606585B (en) * | 2020-07-02 | 2021-06-11 | 武汉大学 | Superfine carbonate type tailing-based active material, preparation method thereof and application of superfine carbonate type tailing-based active material as cement material |
| CN112951346A (en) * | 2020-11-30 | 2021-06-11 | 南京航空航天大学 | Mix proportion design method suitable for mixed recycled coarse aggregate concrete |
| CN113111560B (en) * | 2021-04-26 | 2022-04-15 | 山东大学 | Generation method and system of microscopic structure model of heterogeneous mineral casting |
| CN114276073B (en) * | 2021-05-25 | 2023-03-31 | 山西黄河前沿新材料研究院有限公司 | Light high-performance concrete for fabricated building and preparation method thereof |
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