CN110563405B - Environment-friendly admixture concrete and preparation process thereof - Google Patents
Environment-friendly admixture concrete and preparation process thereof Download PDFInfo
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- CN110563405B CN110563405B CN201910889876.9A CN201910889876A CN110563405B CN 110563405 B CN110563405 B CN 110563405B CN 201910889876 A CN201910889876 A CN 201910889876A CN 110563405 B CN110563405 B CN 110563405B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an environment-friendly admixture concrete and a preparation process thereof, belonging to the technical field of environment-friendly concrete. The technical scheme is that the environment-friendly admixture concrete comprises the following components in parts by weight: 400 parts of cement 350-containing material, 250 parts of admixture 200-containing material, 600 parts of fine aggregate 550-containing material, 1000 parts of coarse aggregate 930-containing material, 5-15 parts of water reducing agent and 180 parts of water 160-containing material; the admixture comprises phosphorus slag powder, vanadium iron slag and fly ash. The environment-friendly admixture concrete achieves the effects of developing and utilizing industrial waste to prepare mineral admixture, reducing the water requirement and raw material cost of the concrete, saving energy, increasing yield and reducing cost. The invention also discloses a preparation process of the environment-friendly admixture concrete, which adopts a secondary stirring process of adding water twice, and has simple and practical process operation.
Description
Technical Field
The invention relates to the technical field of environment-friendly concrete, in particular to novel environment-friendly admixture concrete and a preparation process thereof.
Background
Concrete is one of the most used building materials in the civil engineering field at present, and has the characteristics of good durability, low manufacturing cost, easy die casting and the like. Concrete is a mixed material in which cement is used as a binder and aggregate is used as a filler, and the production of cement is rapidly progressing with the increase in the amount of concrete.
At present, the cement industry has paid more and more attention to the development and application of improving the quality of cement, saving energy, protecting environment and reutilizing resources. Among them, the use of mineral admixtures to partially replace cement, reduce the amount of cement clinker used and coal consumption, and reduce the amount of emissions has been an important measure in the cement industry. In fact, research on the application of traditional mineral admixtures such as fly ash in concrete has been carried out for many years, and practical tests prove that the mineral admixtures have an improvement effect on the structure and the performance of the concrete. However, due to the vigorous development of the engineering and construction projects in our country, the traditional mineral materials are gradually in shortage, so that more novel and environment-friendly mineral admixtures are needed to replace part of the traditional admixtures.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the following steps: the novel environment-friendly admixture concrete is provided, so that the effects of developing and utilizing industrial waste materials to prepare novel mineral admixtures to replace part of traditional admixtures, reducing the water requirement and the raw material cost of the concrete, saving energy, increasing production and reducing cost are achieved.
The first purpose of the invention is realized by the following technical scheme: the novel environment-friendly admixture concrete comprises the following components in parts by weight: 400 parts of cement 350-containing material, 250 parts of admixture 200-containing material, 600 parts of fine aggregate 550-containing material, 1000 parts of coarse aggregate 930-containing material, 5-15 parts of water reducing agent and 180 parts of water 160-containing material; the admixture comprises phosphorus slag powder, vanadium iron slag and fly ash.
Phosphorus Slag (PS) is a abbreviation for granulated electric furnace Phosphorus slag, which is an industrial waste slag mainly containing calcium silicate obtained when yellow Phosphorus is prepared by sublimation of Phosphorus ore, silica and coke in an electric furnace in industrial production. The granulated phosphorus slag is formed after water quenching of the phosphorus slag, and the main structure of the granulated phosphorus slag is a vitreous body and has higher activity. The phosphorus slag is ground into powder and then is added into concrete as an admixture, with the increase of hydration time, a network framework in a phosphorus slag powder glass body is continuously broken, new bonds are continuously generated and old bonds are continuously broken, so that the glass body is decomposed, new hydrated calcium silicate is continuously polymerized, ettringite particles grow, the ettringite and C-S-H gel are crosslinked to fill and block pores, the porosity is reduced, the concrete structure is more compact, and the structure is more compact and the strength is gradually increased.
Vanadium iron slag and fly ash admixture and cement hydration product Ca (OH) enriched at transition zone interface2Reacting to form C-S-H gel, which makes Ca (OH)2The porosity of the crystal and the interface is greatly reduced, so that the cracks of the interface transition area are greatly reduced, the binding power of the aggregate and the gel material is enhanced, and the structure of the interface transition area is improved; the ferrovanadium slag and the fly ash have a certain micro-expansion effect, so that the concrete structure can be more compact under the constraint condition in the hydration and condensation process of the concrete, and the corrosion resistance and the crack resistance of the concrete are improved.
The water reducing agent is used as a component of concrete, and has a small specific gravity, but has a great influence on the mechanical properties of the concrete. On one hand, the water reducing agent is adsorbed on the surface of cement particles to enable the particles to show electrical property, and the particles repel each other due to the same charge, so that the cement particles are dispersed to release excessive water among the particles to generate a water reducing effect. On the other hand, after the water reducing agent is added, an adsorption film is formed on the surface of cement particles, the hydration speed of cement is influenced, the growth of a cement stone crystal is more perfect, capillary gaps for water evaporation are reduced, the network structure is more compact, and the compactness of the concrete structure is improved. The water reducing agent is one or more of a polycarboxylic acid water reducing agent, a naphthalene water reducing agent, a melamine water reducing agent or a lignosulfonate water reducing agent.
By adopting the scheme, cement, admixture, fine aggregate and coarse aggregate in a specific ratio are used as the base material of the concrete, the water reducing agent is used in cooperation, the water consumption of the recycled concrete is reduced, pores generated by evaporation of free water are reduced, phosphorus slag powder, ferrovanadium slag and fly ash in the admixture are used in cooperation, the compactness of a concrete structure is improved, and the novel environment-friendly admixture concrete has good compression resistance, crack resistance and durability.
In addition, the development and utilization of industrial waste to prepare the novel mineral admixture replaces part of the traditional admixture, has great economic value and environmental protection benefit, can reduce the water demand and the raw material cost of concrete, and has the advantages of energy conservation, yield increase and cost reduction.
The invention is further configured to: the admixture also comprises rock powder.
By adopting the scheme, the rock powder, the phosphorus slag powder, the ferrovanadium slag and the fly ash are used in a matching way and are jointly used as an admixture to be doped into concrete, so that the compactness of a concrete structure can be further improved, and the corrosion resistance and the crack resistance of the concrete are improved.
The invention is further configured to: in the admixture, the weight percentages of the phosphorus slag powder, the ferrovanadium slag, the fly ash and the rock powder are respectively 20-30%, 20-30%, 30-40% and 20-30%.
By adopting the scheme, the weight ratio of the four components of the phosphorus slag powder, the vanadium iron slag, the coal ash and the rock powder in the admixture is optimized, the synergistic effect of the phosphorus slag powder, the vanadium iron slag, the coal ash and the rock powder is promoted, the matched use effect of the four admixtures can be further enhanced, the gel material formed by the matched use of the admixture and the cement is more compact, and the corrosion resistance and the crack resistance of the concrete are improved.
The invention is further configured to: the rock powder comprises granite powder and slate powder.
Granite powder is uniformly distributed among cement particles, so that the particle grading of concrete is improved, the gaps among the particles are reduced, free water is increased, the fluidity of concrete mixtures is improved, the pores in the concrete are reduced, and the compactness of the concrete is improved.
The main component of slate is SiO2And Al2O3The slate stone powder has reasonable grain size distribution, and may be used as cement concrete admixture to reach the aims of raising strength and improving durability.
By adopting the scheme, the granite powder and the slate powder are preferably selected to be matched for use, so that the excellent performance of the rock powder as an admixture can be further improved, and the corrosion resistance of concrete is further improved.
The invention is further configured to: the mass ratio of the granite stone powder to the slate stone powder is 1: 2-3.
By adopting the scheme, the matching proportion of the granite powder and the slate powder in the rock powder is optimized, so that the synergistic use effect of the two rock powders can be better improved, and the use effect of the rock powder admixture is further enhanced.
The invention is further configured to: the particle size of the granite powder is 15-30 μm, and the specific surface area is 800-850m2Per kg; the particle size of the slate powder is 10-30 mu m, the specific surface area is 800-2/kg。
By adopting the scheme, the particle size and the specific surface area of the granite powder and the slate powder are optimized, the performance of the two kinds of rock powder can be improved, the effect of the admixture can be better exerted, and the corrosion resistance of the concrete can be further improved.
The invention is further configured to: the specific surface area of the phosphorus slag powder is 500-600m2/kg, fluidity ratio not less than 95%, P2O5The content is less than or equal to 3 percent.
By adopting the scheme, the specific surface area, the fluidity and the P of the phosphorus slag powder are optimized2O5Content property parameters can beThe performance of the phosphorus slag powder as an admixture is enhanced in one step, the porosity of the concrete is further reduced, and the concrete structure is more compact.
The invention is further configured to: the specific surface area of the vanadium iron slag is 600-800m2Per kg, the content of calcium oxide is 55-60%.
By adopting the scheme, the specific surface area and the calcium oxide content of the ferrovanadium slag are optimized, the performance of the ferrovanadium slag as an admixture can be further enhanced, the binding power of aggregate and gel materials in concrete is further improved, and the concrete structure is more compact.
The invention is further configured to: the cement comprises one or more of portland cement, pozzolana portland cement or composite portland cement.
By adopting the scheme, the quality of the cement performance has great influence on the quality and performance of the concrete. The type of cement is optimized, so that the performance of a concrete base material formed by mixing the cement, the admixture and the aggregate is better, the cooperation effect of the cement and the water reducing agent is stronger, and the compressive strength of the concrete is further improved.
The second purpose of the invention is that: the preparation process of the novel environment-friendly admixture concrete comprises the following steps:
s1, weighing cement, fine aggregate, recycled coarse aggregate and half of water according to the proportion, and mixing for 5-8 min to obtain a mixture M;
and S2, weighing the admixture, the water reducing agent and the residual half water according to the proportion, adding the admixture into the mixture M, and mixing for 5-10 min to obtain the novel environment-friendly admixture concrete.
By adopting the scheme, the cement, the coarse aggregate, the fine aggregate and half of water are mixed, so that the aggregate is fully contacted with the hydrated particles of the cement, and the bonding strength between the cement paste and the aggregate is enhanced. And adding the admixture, the water reducing agent and the rest half of water, so that the water reducing agent and the admixture are mixed together and uniformly dispersed into the mixture of the aggregate and the cement, and the interface performance and the compactness of the concrete are improved. The corrosion resistance, compressive strength and crack resistance of the novel environment-friendly admixture concrete are further improved by adopting a secondary stirring process of adding water twice.
In conclusion, the invention has the following beneficial effects:
1. according to the novel environment-friendly admixture concrete, cement, an admixture, fine aggregate and coarse aggregate in a specific ratio are used as a base material of the concrete, a water reducing agent is used in a matching manner, the water consumption of recycled concrete is reduced, pores generated due to evaporation of free water are reduced, phosphorus slag powder, ferrovanadium slag and fly ash in the admixture are used in a matching manner, the compactness of a concrete structure is improved, and the novel environment-friendly admixture concrete has good compression resistance, crack resistance and durability;
2. the novel environment-friendly admixture concrete disclosed by the invention develops and utilizes industrial waste to prepare a novel mineral admixture to replace part of the traditional admixture, has great economic value and environmental protection benefit, can reduce the water demand and raw material cost of the concrete, and has the advantages of saving energy, increasing yield and reducing cost;
3. the preparation process of the novel environment-friendly admixture concrete adopts a secondary stirring process of adding water twice, the process operation is simple and practical, and the corrosion resistance, compressive strength and crack resistance of the novel environment-friendly admixture concrete can be improved.
Detailed Description
The present invention will be described in further detail below.
In the following examples and comparative examples, Portland cement was selected as grade P.I, strength grade 42.5; the fine aggregate is artificial sand with fineness modulus of 2.5, mud content of 1% and apparent density of 2700kg/m3(ii) a The coarse aggregate is crushed stone with average particle size of 6mm, mud content of 1% and apparent density of 2700kg/m3The needle flake content is 3%; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
Example 1
The novel environment-friendly admixture concrete comprises the following components in parts by weight: 350 parts of Portland cement, 250 parts of admixture, 550 parts of fine aggregate, 1000 parts of coarse aggregate, 5 parts of water reducing agent and 180 parts of water;
in the admixture, phosphorus slag powder, vanadium iron slag, fly ash andthe weight percentages of the rock powder are respectively 20%, 30%, 30% and 20%; the specific surface area of the phosphorus slag powder is 500m2/kg, fluidity ratio not less than 95%, P2O5The content is less than or equal to 3 percent; the specific surface area of the ferrovanadium slag is 600m2Per kg, the calcium oxide content is 55%;
in the rock powder, the mass ratio of granite powder to slate powder is 1: 2; the particle size of the granite powder is 15 mu m, and the specific surface area is 850m2Per kg; the particle diameter of the slate powder is 10 mu m, and the specific surface area is 900m2/kg；
The preparation method of the novel environment-friendly admixture concrete comprises the following steps:
s1, weighing cement, fine aggregate, recycled coarse aggregate and half of water according to the proportion, and mixing for 5min to obtain a mixture M;
and S2, weighing the admixture, the water reducing agent and the residual half water according to the proportion, adding the admixture, the water reducing agent and the residual half water into the mixture M, and mixing for 5min to obtain the novel environment-friendly admixture concrete.
Example 2
The novel environment-friendly admixture concrete comprises the following components in parts by weight: 400 parts of Portland cement, 200 parts of admixture, 600 parts of fine aggregate, 930 parts of coarse aggregate, 15 parts of water reducing agent and 160 parts of water;
in the admixture, the weight percentages of the phosphorus slag powder, the vanadium iron slag, the fly ash and the rock powder are respectively 20 percent, 30 percent and 30 percent; the specific surface area of the phosphorus slag powder is 600m2/kg, fluidity ratio not less than 95%, P2O5The content is less than or equal to 3 percent; the specific surface area of the ferrovanadium slag is 800m2Per kg, the calcium oxide content is 60%;
in the rock powder, the mass ratio of granite powder to slate powder is 1: 3; the particle size of the granite powder is 30 mu m, and the specific surface area is 800m2Per kg; the particle size of the slate powder is 30 mu m, and the specific surface area is 800m2/kg；
The preparation method of the novel environment-friendly admixture concrete comprises the following steps:
s1, weighing cement, fine aggregate, recycled coarse aggregate and half of water according to the proportion, and mixing for 8min to obtain a mixture M;
and S2, weighing the admixture, the water reducing agent and the residual half water according to the proportion, adding the admixture, the water reducing agent and the residual half water into the mixture M, and mixing for 3min to obtain the novel environment-friendly admixture concrete.
Example 3
The novel environment-friendly admixture concrete comprises the following components in parts by weight: 380 parts of Portland cement, 230 parts of admixture, 580 parts of fine aggregate, 980 parts of coarse aggregate, 10 parts of water reducing agent and 170 parts of water;
in the admixture, the weight percentages of the phosphorus slag powder, the vanadium iron slag, the fly ash and the rock powder are respectively 20 percent, 35 percent and 25 percent; the specific surface area of the phosphorus slag powder is 550m2/kg, fluidity ratio not less than 95%, P2O5The content is less than or equal to 3 percent; the specific surface area of the ferrovanadium slag is 850m2Per kg, the calcium oxide content is 60%;
in the rock powder, the mass ratio of granite powder to slate powder is 1: 2.5; the particle size of the granite powder is 20 mu m, and the specific surface area is 820m2Per kg; the particle size of the slate powder is 20 mu m, the specific surface area is 850m2/kg；
The preparation method of the novel environment-friendly admixture concrete comprises the following steps:
s1, weighing cement, fine aggregate, recycled coarse aggregate and half of water according to the proportion, and mixing for 7min to obtain a mixture M;
and S2, weighing the admixture, the water reducing agent and the residual half water according to the proportion, adding the admixture, the water reducing agent and the residual half water into the mixture M, and mixing for 4min to obtain the novel environment-friendly admixture concrete.
Example 4
The novel environment-friendly admixture concrete is different from the concrete in example 3 in that the admixture comprises 25 wt%, 30 wt% and 20 wt% of phosphorus slag powder, 25 wt%, vanadium iron slag, fly ash and rock powder.
Example 5
The novel environment-friendly admixture concrete is different from the concrete in example 3 in that the weight percentages of the phosphorus slag powder, the ferrovanadium slag, the fly ash and the rock powder in the admixture are respectively 40%, 40%, 10% and 10%.
Example 6
The novel environment-friendly admixture concrete is different from the concrete in example 3 in that the weight percentages of phosphorus slag powder, vanadium iron slag, fly ash and rock powder in the admixture are respectively 5%, 10%, 45% and 40%.
Example 7
The novel environment-friendly admixture concrete is different from the concrete in example 3 in that the mass ratio of granite powder to slate powder in the rock powder is 1: 5.
Example 8
The novel environment-friendly admixture concrete is different from the concrete in example 3 in that the mass ratio of granite powder to slate powder in the rock powder is 1: 0.5.
Example 9
A novel environment-friendly admixture concrete is different from the concrete in example 3 in that the particle size of granite stone powder is 10 mu m, and the specific surface area is 900m2Per kg; the particle size of the slate powder is 5 mu m, and the specific surface area is 1000m2/kg。
Example 10
A novel environment-friendly admixture concrete is different from the concrete in example 3 in that the particle size of granite stone powder is 40 mu m, and the specific surface area is 700m2Per kg; the particle diameter of the slate powder is 50 μm, and the specific surface area is 650m2/kg。
Example 11
A novel environment-friendly admixture concrete is different from the concrete in example 3 in that the specific surface area of the phosphorus slag powder is 400m2/kg, fluidity ratio not more than 90%, P2O5The content is more than or equal to 4 percent.
Example 12
A novel environment-friendly admixture concrete is different from the concrete in example 3 in that the specific surface area of the ferrovanadium slag is 500m2Per kg, the calcium oxide content is 40%.
Example 13
A novel environment-friendly admixture concrete, which is different from the concrete in the embodiment 3 in that rock powder is not included in the admixture.
Comparative example 1
A concrete is different from the concrete in example 3 in that phosphorus slag powder is not added to the admixture.
Comparative example 2
A concrete is different from the concrete in example 3 in that no ferrovanadium slag is added to the admixture.
Comparative example 3
A concrete, which is different from the concrete of example 3 in that no fly ash is added to the admixture.
Comparative example 4
A concrete is different from the concrete in example 3 in that phosphorus slag powder and vanadium iron slag are not added in the admixture.
Comparative example 5
The concrete comprises the following components in parts by weight: 300 parts of Portland cement, 400 parts of admixture, 500 parts of fine aggregate, 1200 parts of coarse aggregate, 3 parts of water reducing agent and 150 parts of water; the rest is the same as in example 3.
Examples of the experiments
The compressive property, crack resistance and durability of the concrete provided in examples 1-13 and comparative examples 1-5 were tested with reference to "standard for testing mechanical properties of ordinary concrete GB/T50081-2002" and "standard for testing methods for testing long-term properties and durability of ordinary concrete GB/T50082-2009", and the test results are shown in table 1.
As can be seen from the data in Table 1, the concrete of example 3 has better compressive strength, cracking time, shrinkage and electric flux than those of examples 1 and 2 and examples 4 to 13. The experimental results data for the tests of compressive strength, cracking time, shrinkage and electric flux for the concretes provided in comparative examples 1-5 are clearly not as good as example 3.
Compared with the embodiment 3, the embodiment 4-6 has the advantages that the content of the phosphorus slag powder and the vanadium iron slag is adjusted and increased in the embodiment 4, the content of the fly ash and the rock powder is reduced, and the mixture ratio of the four admixtures is in the optimal range; in the embodiment 5, the contents of the phosphorus slag powder and the vanadium iron slag are increased, the contents of the fly ash and the rock powder are reduced, and the mixture ratio of the four admixtures is not in the optimal range; in example 6, the contents of the phosphorus slag powder and the ferrovanadium slag are reduced, the contents of the fly ash and the rock powder are increased, and the mixture ratio of the four admixtures is not in the preferable range. It can be seen from the results of comparing examples 4-6 with example 3 that the blending ratio of the four components in the admixture has an influence on the compression resistance, crack resistance and durability of the concrete.
Examples 7 and 8 are compared with example 3, in example 7, the content of granite powder is low by adjusting the mixing ratio of the granite powder and the slate powder, and the mixing ratio is not in the preferred range; in example 8, the blending ratio of granite powder to slate powder was adjusted, and the content of slate powder was small, and the blending ratio was not in the preferred range. It can be seen from the results of comparing examples 7 and 8 with example 3 that the blending ratio of granite powder and slate powder in the admixture has an effect on the compression resistance, crack resistance and durability of the concrete.
Examples 9 and 10 are compared with example 3, and in example 9, the particle size and specific surface area of the granite powder and slate powder are adjusted, the particle size is reduced, and the specific surface area is increased, which are not in the preferable range; in example 10, the particle size and specific surface area of the granite powder and slate powder were adjusted, and the particle size increased and specific surface area decreased, which were not in the preferred ranges. It can be seen from the results of the tests conducted in examples 9 and 10 and example 3 that the particle size and specific surface area of the granite powder and slate powder in the admixture have an effect on the compression resistance, crack resistance and durability of the concrete.
Comparing examples 11-13 with example 3, the performance parameters of the phosphorous slag powder in example 11 are adjusted and are not in the preferred range; in example 12, the performance parameters of the ferrovanadium slag were adjusted out of the preferred ranges. It can be seen from the test results of comparative examples 11 and 12 and example 3 that the performance parameters of the phosphorous slag powder and the ferrovanadium slag in the admixture have an influence on the compression resistance, the crack resistance and the durability of the concrete. Example 13 in comparison to example 3, rock dust was not included in the admixture; it can be seen from the results of comparing example 13 with example 3 that the use of rock flour as one of the four admixtures in combination with the other three admixtures has an effect on the compressive properties, crack resistance and durability of the concrete.
Comparative examples 1-5 compare with example 3, and no phosphorous slag powder is added to the admixture of comparative example 1; no ferrovanadium slag was added to the admixture of comparative example 2; no fly ash was added to the admixture of comparative example 3; the admixture of comparative example 4 was not charged with phosphorous slag powder and ferrovanadium slag; the contents of the concrete components in comparative example 5 were not within the protection limits. As can be seen from the results of comparing comparative examples 1 to 5 with example 3, the kind of admixture added and the contents of the respective components in the concrete have an influence on the compression resistance, crack resistance and durability of the concrete.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can modify the embodiments without inventive contribution as required after reading this specification, but only fall within the scope of the claims of the present invention.
Claims (5)
1. An environment-friendly admixture concrete is characterized in that: the paint comprises the following components in parts by weight: 400 parts of cement 350-containing material, 250 parts of admixture 200-containing material, 600 parts of fine aggregate 550-containing material, 1000 parts of coarse aggregate 930-containing material, 5-15 parts of water reducing agent and 180 parts of water 160-containing material;
the admixture comprises phosphorus slag powder, vanadium iron slag and fly ash;
the admixture further comprises rock powder;
in the admixture, the weight percentages of the phosphorus slag powder, the ferrovanadium slag, the fly ash and the rock powder are respectively 20-30%, 20-30%, 30-40% and 20-30%;
the rock powder comprises granite powder and slate powder;
the mass ratio of the granite powder to the slate powder is 1: 2-3; the particle size of the granite powder is 15-30 μm, and the specific surface area is 800-850m2/kg；
The particle size of the slate powder is 10-30 mu m, the specific surface area is 800-2/kg。
2. The environment-friendly admixture concrete of claim 1Soil, its characterized in that: the specific surface area of the phosphorus slag powder is 500-600m2/kg, fluidity ratio not less than 95%, P2O5The content is less than or equal to 3 percent.
3. The environment-friendly admixture concrete according to claim 1, wherein: the specific surface area of the vanadium iron slag is 600-800m2Per kg, the content of calcium oxide is 55-60%.
4. The environment-friendly admixture concrete according to claim 1, wherein: the cement comprises one or more of portland cement, pozzolana portland cement or composite portland cement.
5. A process for preparing the environment-friendly admixture concrete as defined in any one of claims 1 to 4, wherein the process comprises the steps of:
s1, weighing cement, fine aggregate, recycled coarse aggregate and half of water according to the proportion, and mixing for 5-8 min to obtain a mixture M;
and S2, weighing the admixture, the water reducing agent and the residual half water according to the proportion, adding the admixture, the water reducing agent and the residual half water into the mixture M, and mixing for 3-5 min to obtain the environment-friendly admixture concrete.
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| CN114524645B (en) * | 2022-01-30 | 2022-10-14 | 山东高速工程建设集团有限公司 | FP (Fabry-Perot) complex-doped high-stone-powder-content machine-made sand concrete and production process thereof |
| CN115259776B (en) * | 2022-08-01 | 2023-06-02 | 顺裕（龙岩）混凝土有限公司 | Preparation process of concrete using machine-made sand as admixture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3524703C2 (en) * | 1985-07-11 | 1989-03-16 | Gfe Gesellschaft Fuer Elektrometallurgie Mbh, 4000 Duesseldorf, De | |
| WO2005061406A1 (en) * | 2003-12-18 | 2005-07-07 | Lafarge | Hydraulic mineral composition, production method thereof and hydraulic binders and cementitious products containing one such composition |
| CN101016205A (en) * | 2007-01-31 | 2007-08-15 | 北京恒坤混凝土有限公司 | Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof |
| CN101016198A (en) * | 2007-01-31 | 2007-08-15 | 北京恒坤混凝土有限公司 | Ultra-fine carbonate rock powder concrete composite blending material and preparing method thereof |
| CN104909677A (en) * | 2015-05-27 | 2015-09-16 | 葛洲坝中固科技股份有限公司 | Silicon-aluminum-based tailings cementing agent for mine filling, and preparation method thereof |
-
2019
- 2019-09-20 CN CN201910889876.9A patent/CN110563405B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3524703C2 (en) * | 1985-07-11 | 1989-03-16 | Gfe Gesellschaft Fuer Elektrometallurgie Mbh, 4000 Duesseldorf, De | |
| WO2005061406A1 (en) * | 2003-12-18 | 2005-07-07 | Lafarge | Hydraulic mineral composition, production method thereof and hydraulic binders and cementitious products containing one such composition |
| CN101016205A (en) * | 2007-01-31 | 2007-08-15 | 北京恒坤混凝土有限公司 | Concrete composition containing ultra-fine carbonate rock powder and preparation method thereof |
| CN101016198A (en) * | 2007-01-31 | 2007-08-15 | 北京恒坤混凝土有限公司 | Ultra-fine carbonate rock powder concrete composite blending material and preparing method thereof |
| CN104909677A (en) * | 2015-05-27 | 2015-09-16 | 葛洲坝中固科技股份有限公司 | Silicon-aluminum-based tailings cementing agent for mine filling, and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 矿物掺合料对水泥基材料化学收缩与光谱性能的影响;吴福飞等;《农业工程学报》;20180228;第34卷(第4期);第177-184页 * |
| 钒铁渣掺合料物理力学性能及其对混凝土补偿收缩研究;胡乔思;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20130315;第64页第5.4节，第65页表5-3编号9 * |
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