CN115353350A - C15 concrete with excellent carbonization resistance and shrinkage performance - Google Patents
C15 concrete with excellent carbonization resistance and shrinkage performance Download PDFInfo
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- CN115353350A CN115353350A CN202211034511.6A CN202211034511A CN115353350A CN 115353350 A CN115353350 A CN 115353350A CN 202211034511 A CN202211034511 A CN 202211034511A CN 115353350 A CN115353350 A CN 115353350A
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B28/08—Slag cements
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of concrete, in particular to concrete. The C15 concrete provided by the invention comprises the following components in parts by weight: 100 to 150 portions of cement, 80 to 160 portions of coal gangue powder, 60 to 100 portions of other admixture, 170 to 180 portions of water, 1030 to 1040 portions of pebble, 840 to 845 portions of sand and 6.0 to 7.0 portions of water reducer; the other admixture comprises waste brick powder and/or steel slag powder; the specific surface area of the coal gangue powder is 400-450 m 2 Per kg, the specific surface area of the waste brick powder is 500-550 m 2 Per kg, the specific surface area of the steel slag powder is 300-350 m 2 In terms of/kg. According to the records of the embodiment, the C15 concrete has good workability and plasticity, and the compressive strength, the carbonization resistance and the shrinkage resistance all meet the relevant national standards.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to C15 concrete with excellent carbonization resistance and shrinkage performance.
Background
It is well known that the main measure of the quality of concrete is generally the compressive strength. Generally, the compressive strength of concrete is proportional to the strength of concrete cement and inversely proportional to the water cement ratio. However, when the water cement ratio is not changed, the workability of the concrete can only be increased by increasing the amount of cement, and the shrinkage performance and the deformation performance of the concrete are improved.
Disclosure of Invention
The invention aims to provide the C15 concrete with excellent carbonization resistance and shrinkage performance, and the C15 concrete has high shrinkage performance and good carbonization resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides C15 concrete which comprises the following preparation raw materials in parts by mass: 100 to 150 portions of cement, 80 to 160 portions of coal gangue powder, 60 to 100 portions of other admixture, 170 to 180 portions of water, 1030 to 1040 portions of pebble, 840 to 845 portions of sand and 6.0 to 7.0 portions of water reducer;
the other admixture comprises waste brick powder and/or steel slag powder;
the specific surface area of the coal gangue powder is 400-450 m 2 Per kg, the specific surface area of the waste brick powder is 500-550 m 2 Per kg, the specific surface area of the steel slag powder is 300-350 m 2 /kg。
Preferably, the cement is p.o42.5 cement, p.o52.5 cement, p.s42.5 cement or p.s52.5 cement.
Preferably, when the other admixture comprises waste brick powder and steel slag powder, the mass ratio of the waste brick powder to the steel slag powder is 2:3.
Preferably, the particle size of the stones is 5 to 25mm.
Preferably, the sand is zone II machine-made sand, and the fineness modulus is 2.7.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
The invention provides C15 concrete which comprises the following preparation raw materials in parts by weight: 100 to 150 portions of cement, 80 to 160 portions of coal gangue powder, 60 to 100 portions of other admixture, 170 to 180 portions of water, 1030 to 1040 portions of pebble, 840 to 845 portions of sand and 6.0 to 7.0 portions of water reducer; the other admixture comprises waste brick powder and/or steel slag powder; the specific surface area of the coal gangue powder is 400-450 m 2 Per kg, the specific surface area of the waste brick powder is 500-550 m 2 Per kg, the specific surface area of the steel slag powder is 300-350 m 2 In terms of/kg. According to the description of the examples, the powder consists of coal gangue powder, brick powder and steel slag powder with three different specific surface areasThe ternary mineral admixture system and cement are compatible to form a composite cementing material system, the hydration reaction activity and the particle size complementary effect of four cementing materials are effectively exerted, the hydration hardening reaction process of the cementing materials and the working performance of a concrete mixture are better coordinated, more cement hydration products, namely hydrated calcium silicate gel, are generated, the compactness of a concrete microstructure is improved, and the mechanical property, the durability and the volume stability of hardened concrete are improved. Therefore, the C15 concrete can obtain sufficient working performance and strength performance under the condition of low cement consumption, and has better carbonization resistance and smaller volume shrinkage. The machine-discharging slump and the slump expansion of the C15 concrete mixture respectively reach 200mm and 500mm, the working performance is kept good, the 2h time loss is low, the 2h slump and the slump expansion respectively reach about 160mm and 390mm, and the concrete mixture is not separated and does not bleed, so that the working requirement of concrete pumping construction is completely met; the concrete compressive strength reaches 22-27 MPa in 28 days, and the strength requirement of C20 grade is met; the carbonization depth of the concrete in the 28-day age is only 11-13 mm, the carbonization depth is small, and the concrete shows good carbonization resistance; the concrete has 60-day shrinkage value of only 350-400 mu epsilon, has low shrinkage rate and shows good volume stability. Therefore, the C15 concrete provided by the invention has good working performance, compressive strength, carbonization resistance and shrinkage resistance, and can meet the performance and construction standard requirements of C20-grade concrete.
Detailed Description
The invention provides C15 concrete which comprises the following preparation raw materials in parts by mass: 100 to 150 portions of cement, 80 to 160 portions of coal gangue powder, 60 to 100 portions of other admixture, 170 to 180 portions of water, 1030 to 1040 portions of pebble, 840 to 845 portions of sand and 6.0 to 7.0 portions of water reducer;
the other admixture comprises waste brick powder and/or steel slag powder;
the specific surface area of the coal gangue powder is 400-450 m 2 Per kg, the specific surface area of the waste brick powder is 500-550 m 2 Per kg, the specific surface area of the steel slag powder is 300-350 m 2 /kg。
The preparation raw material of the C15 concrete comprises, by mass, 100-150 parts of cement, preferably 110-140 parts, and more preferably 120-130 parts. In the present invention, the cement is preferably p.o42.5 cement, p.o52.5 cement, p.s42.5 cement or p.s52.5 cement.
Based on the mass parts of the cement, the preparation raw material of the C15 concrete comprises 80-160 parts of coal gangue powder, preferably 90-150 parts, more preferably 100-140 parts, and most preferably 120-130 parts. In the invention, the specific surface area of the coal gangue powder is preferably 400-450 m 2 /kg。
In the invention, the gangue powder is used as a mineral admixture and generates a secondary hydration reaction in concrete, so that the hydration degree of cement and the number of hydrated calcium silicate gel are improved, and the compactness and strength of a concrete microstructure are improved; the function of controlling the specific surface area of the coal gangue within the range is to make the particle size ranges of the three admixtures form complementation, and keep the auxiliary gelling performance and the cost of the three admixtures in a more reasonable balanced state.
The raw materials for preparing the C15 concrete comprise 60 to 100 parts of other admixtures, preferably 70 to 90 parts, more preferably 75 to 85 parts, and most preferably 78 to 82 parts by weight based on the mass parts of the cement. In the present invention, the other admixture includes waste brick powder and/or steel slag powder; the specific surface area of the waste brick powder is preferably 500-550 m 2 The specific surface area of the steel slag powder is preferably 300-350 m/kg 2 (iv) kg. When the other admixture comprises waste brick powder and steel slag powder, the mass ratio of the waste brick powder to the steel slag powder is preferably 2:3.
In the invention, the waste brick powder is used as a mineral admixture and has a secondary hydration reaction in concrete, so that the hydration degree of cement and the quantity of hydrated calcium silicate gel are improved, and the compactness and strength of a concrete microstructure are improved; the effect of controlling the specific surface area of the waste brick powder within the above range is to improve the activity and micro-aggregate effect of the waste brick powder; the steel slag powder is used as a mineral admixture, and has a secondary hydration reaction in concrete, so that the hydration degree of cement and the quantity of hydrated calcium silicate gel are improved, and the compactness and strength of the microstructure of the concrete are improved; the specific surface area of the steel slag powder is controlled within the range, so that the activity of the steel slag is improved as much as possible on the premise of ensuring the grinding efficiency of the steel slag.
The raw materials for preparing the C15 concrete comprise 170-180 parts of water, preferably 172-178 parts of water, and more preferably 174-176 parts of water based on the mass parts of the cement.
Based on the mass portion of the cement, the preparation raw material of the C15 concrete comprises 1030-1040 parts of stones, preferably 1032-1038 parts of stones, and more preferably 1034-1036 parts of stones. In the present invention, the particle size of the stone is preferably 5 to 25mm. In the present invention, the stones are preferably in the following gradation relationship: meets the continuous grading of the national standard requirement.
In the invention, the stones and the fine aggregate form a framework of a concrete structure together, the stones are controlled within the particle size range, and the stones under the grading relationship ensure that the concrete has sufficient framework strength, compactness and working performance.
The raw materials for preparing the C15 concrete comprise 840-845 parts of sand, preferably 841-844 parts of sand, and more preferably 842-843 parts of sand by mass. In the present invention, the sand is preferably zone ii machine sand, and the fineness modulus is preferably 2.7.
In the present invention, the sand functions to form a framework of a concrete structure together with coarse aggregate; the effect of controlling the fineness modulus of the sand within the above range is to ensure that the concrete has sufficient skeleton strength, compactness and working performance.
Based on the mass parts of the cement, the preparation raw material of the C15 concrete comprises 6.0-7.0 parts of water reducing agent, preferably 6.2-6.8 parts, and more preferably 6.4-6.6 parts. In the invention, the water reducing agent is preferably a polycarboxylic acid water reducing agent, and more preferably a TGC-YS polycarboxylic acid high-efficiency water reducing agent.
In the invention, the water reducing agent has the functions of improving the workability of concrete mixtures, reducing the water consumption and improving the mechanical property and the durability of concrete; the further advantage that the water reducing agent is limited to TGC-YS polycarboxylic acid high efficiency water reducing agent can bring is that the function of the water reducing agent is better exerted.
The preparation method of the C15 concrete of the invention is not limited in any way, and can be carried out by methods well known to those skilled in the art.
The following examples are provided to illustrate the concrete of C15 according to the present invention in detail, but they should not be construed as limiting the scope of the present invention.
Examples 1 to 4
Raw materials: the cement is golden corner P.O42.5 cement; the specific surface area of the coal gangue powder is 400-450 m 2 (iv) kg; the specific surface area of the waste brick powder is 500-550 m 2 Per kg; the specific surface area of the steel slag powder is 300-350 m 2 Per kg; the water is tap water; the stones are 5-25 mm of continuous graded broken stones; the sand is the machine-made sand in the area II, and the fineness modulus is 2.7; the water reducing agent is TGC-YS polycarboxylic acid high-efficiency water reducing agent.
The compositions of the C15 concrete described in examples 1-4 are shown in Table 1:
TABLE 1 compositions of C15 concrete admixtures according to examples 1 to 4
Comparative examples 1 to 4
Raw materials: the cement is golden corner P.O42.5 cement; the specific surface area of the coal gangue powder is 300-350 m 2 Per kg; the specific surface area of the waste brick powder is 350-400 m 2 Per kg; the specific surface area of the steel slag powder is 250-300 m 2 Per kg; the water is tap water; the stones are 5-25 mm of continuous graded broken stones; the sand is the machine-made sand in the area II, and the fineness modulus is 2.7; the water reducing agent is TGC-YS polycarboxylic acid high-efficiency water reducing agent;
the compositions of the C15 concrete of comparative examples 1 to 4 are shown in Table 2:
TABLE 2 compositions of C15 concrete admixtures as described in comparative examples 1 to 4
| Cement | Coal gangue powder | Waste brick powder | Steel slag powder | Water (W) | Stone | Sand | Water reducing agent | |
| Comparative example 1 | 140 | 160 | -- | -- | 175 | 1038 | 842 | 6.4 |
| Comparative example 2 | 140 | 80 | 80 | -- | 176 | 1038 | 842 | 6.6 |
| Comparative example 3 | 140 | 100 | 60 | -- | 175 | 1038 | 842 | 6.5 |
| Comparative example 4 | 120 | 80 | 40 | 60 | 175 | 1040 | 840 | 6.4 |
Test example
The workability, compressive strength, carbonization resistance and shrinkage of the C15 concrete described in examples 1-4 and comparative examples 1-4 were tested according to the standards of GB/T50081-2002 Standard for testing methods for mechanical Properties of ordinary concrete, GB/T50082-2009 Standard for testing methods for Long-term Performance and durability of ordinary concrete, and Row's code JGJ55-2000 design rules for mix proportions of ordinary concrete, and the test results are shown in tables 3-6:
TABLE 3 workability test results of C15 concrete as described in examples 1 to 4 and comparative examples 1 to 4
TABLE 4 compressive Strength (MPa) test results for C15 concretes as described in examples 1 to 4 and comparative examples 1 to 4
TABLE 5 results of test for anti-carbonation property of C15 concrete described in examples 1 to 4 and comparative examples 1 to 4
TABLE 6 shrinkage test results (concrete shrinkage factor,. Times.10) of C15 concrete described in examples 1 to 4 and comparative examples 1 to 4 -6 )
As can be seen from tables 3 to 6, the C15 concrete of the invention has good workability and plasticity, and the compressive strength, the carbonization resistance and the shrinkage resistance all meet the relevant national standards.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The C15 concrete is characterized by comprising the following preparation raw materials in parts by mass: 100 to 150 portions of cement, 80 to 160 portions of coal gangue powder, 60 to 100 portions of other admixture, 170 to 180 portions of water, 1030 to 1040 portions of pebble, 840 to 845 portions of sand and 6.0 to 7.0 portions of water reducer;
the other admixture comprises waste brick powder and/or steel slag powder;
the specific surface area of the coal gangue powder is 400-450 m 2 Per kg, the specific surface area of the waste brick powder is 500-550 m 2 Per kg, the specific surface area of the steel slag powder is 300-350 m 2 /kg。
2. The C15 concrete according to claim 1, wherein the cement is a p.o42.5 cement, a p.o52.5 cement, a p.s42.5 cement, or a p.s52.5 cement.
3. The C15 concrete of claim 1, wherein when the other admixtures comprise waste brick dust and steel slag dust, the mass ratio of the waste brick dust to the steel slag dust is 2:3.
4. The C15 concrete of claim 1, wherein the pebbles have a particle size of 5 to 25mm.
5. The C15 concrete of claim 1, wherein the sand is zone ii machine sand having a fineness modulus of 2.7.
6. The C15 concrete of claim 1, wherein the water reducer is a polycarboxylic acid water reducer.
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| CN202211034511.6A CN115353350A (en) | 2022-08-26 | 2022-08-26 | C15 concrete with excellent carbonization resistance and shrinkage performance |
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| CN202211034511.6A CN115353350A (en) | 2022-08-26 | 2022-08-26 | C15 concrete with excellent carbonization resistance and shrinkage performance |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363575A (en) * | 2011-05-16 | 2012-02-29 | 葛智 | Waste chamotte brick regeneration and utilization method, and concrete doped with waste chamotte brick powder |
| CN104177003A (en) * | 2014-08-04 | 2014-12-03 | 廖昌兴 | Ground coal gangue powder concrete as well as preparation and application methods thereof |
| EP3476812A1 (en) * | 2017-10-25 | 2019-05-01 | Povazská cementáren, a.s. | The process of production of the aggregate for concrete and mortar |
| CN111732388A (en) * | 2020-07-07 | 2020-10-02 | 陕西红旗汇石建筑制品有限公司 | Coal gangue high-temperature-resistant concrete and preparation method thereof |
| CN112159178A (en) * | 2020-10-12 | 2021-01-01 | 北京联绿技术集团有限公司 | Concrete containing waste brick powder and fly ash |
| CN112174613A (en) * | 2020-10-12 | 2021-01-05 | 北京新奥混凝土集团有限公司 | Concrete containing waste brick powder |
-
2022
- 2022-08-26 CN CN202211034511.6A patent/CN115353350A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363575A (en) * | 2011-05-16 | 2012-02-29 | 葛智 | Waste chamotte brick regeneration and utilization method, and concrete doped with waste chamotte brick powder |
| CN104177003A (en) * | 2014-08-04 | 2014-12-03 | 廖昌兴 | Ground coal gangue powder concrete as well as preparation and application methods thereof |
| EP3476812A1 (en) * | 2017-10-25 | 2019-05-01 | Povazská cementáren, a.s. | The process of production of the aggregate for concrete and mortar |
| CN111732388A (en) * | 2020-07-07 | 2020-10-02 | 陕西红旗汇石建筑制品有限公司 | Coal gangue high-temperature-resistant concrete and preparation method thereof |
| CN112159178A (en) * | 2020-10-12 | 2021-01-01 | 北京联绿技术集团有限公司 | Concrete containing waste brick powder and fly ash |
| CN112174613A (en) * | 2020-10-12 | 2021-01-05 | 北京新奥混凝土集团有限公司 | Concrete containing waste brick powder |
Non-Patent Citations (1)
| Title |
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| 彭红, 重庆大学出版社 * |
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