CN114940606A - High-strength concrete and preparation method thereof - Google Patents
High-strength concrete and preparation method thereof Download PDFInfo
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- CN114940606A CN114940606A CN202210725574.XA CN202210725574A CN114940606A CN 114940606 A CN114940606 A CN 114940606A CN 202210725574 A CN202210725574 A CN 202210725574A CN 114940606 A CN114940606 A CN 114940606A
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- river sand
- strength concrete
- cement
- crushed stone
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- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 71
- 239000004575 stone Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000004568 cement Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 19
- SWSBIGKFUOXRNJ-CVBJKYQLSA-N ethene;(z)-octadec-9-enamide Chemical compound C=C.CCCCCCCC\C=C/CCCCCCCC(N)=O.CCCCCCCC\C=C/CCCCCCCC(N)=O SWSBIGKFUOXRNJ-CVBJKYQLSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- 239000011398 Portland cement Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 239000004567 concrete Substances 0.000 abstract description 20
- 239000002994 raw material Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 19
- OXDXXMDEEFOVHR-CLFAGFIQSA-N (z)-n-[2-[[(z)-octadec-9-enoyl]amino]ethyl]octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCNC(=O)CCCCCCC\C=C/CCCCCCCC OXDXXMDEEFOVHR-CLFAGFIQSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- -1 N-methylpyrrolidinone amine Chemical class 0.000 description 1
- NKSOSPOXQKNIKJ-CLFAGFIQSA-N Polyoxyethylene dioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCOC(=O)CCCCCCC\C=C/CCCCCCCC NKSOSPOXQKNIKJ-CLFAGFIQSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/124—Amides
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/128—Heterocyclic nitrogen compounds
-
- 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
Abstract
The invention relates to the technical field of concrete preparation, and particularly discloses high-strength concrete and a preparation method thereof. The high-strength concrete comprises the following components in parts by weight: 200-300 parts of cement; 300-400 parts of river sand; 500-700 parts of gravel; 2-4 parts of a water reducing agent; 70-80 parts of water. The river sand is river sand with the particle size of 0.6-1.2 mm; the broken stone is broken stone with a particle size of 10-15 mm. The high-strength concrete prepared by the method has higher compressive strength; in addition, the high-strength concrete is prepared by taking the common river sand and broken stone as aggregates, and has the advantages of wide raw material source, simple preparation process and relatively low production cost.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to high-strength concrete and a preparation method thereof.
Background
The concrete is one of civil engineering materials and is prepared from a cementing material, aggregate, water, an additive and an admixture which are added if necessary. The dosage of the raw materials is increased due to the characteristics of rich raw materials, low price and simple production process.
With the higher and higher engineering requirements, the indexes of the concrete such as compressive strength, durability and the like are also higher and higher. River sand and gravel are common aggregates with rich sources; most of the concrete is made by mixing river sand and broken stones as aggregate with cement. However, the compressive strength of concrete prepared by simply mixing river sand and crushed stone as aggregate and cement as a binding material is still to be further improved.
Disclosure of Invention
In order to overcome at least one of the technical problems of the prior art, the invention firstly provides a high-strength concrete.
The invention aims to solve the technical problems and is realized by the following technical scheme:
the high-strength concrete comprises the following components in parts by weight: 200-300 parts of cement; 300-400 parts of river sand; 500-700 parts of crushed stone; 2-4 parts of a water reducing agent; 70-80 parts of water.
The river sand refers to river sand with the particle size of 0.6-1.2 mm; the broken stone is broken stone with the particle size of 10-15 mm.
The inventor shows in research that the concrete prepared by using the river sand with the particle size of 0.6-1.2 mm and the broken stone with the particle size of 10-15 mm as the aggregate and using the cement as the gel material has better compressive strength.
Preferably, the high-strength concrete comprises the following components in parts by weight: 250-280 parts of cement; 350-380 parts of river sand; 550-600 parts of broken stone; 3-4 parts of a water reducing agent; 70-80 parts of water.
Most preferably, the high-strength concrete is characterized by comprising the following components in parts by weight: 250 parts of cement; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a water reducing agent; 80 parts of water.
Preferably, the cement is Portland cement with the reference number of 42.5.
Preferably, the water reducing agent is selected from polycarboxylic acid water reducing agents.
Preferably, the river sand refers to river sand with the particle size of 0.8-1.0 mm; the broken stone is broken stone with a particle size of 10-12 mm.
The invention also provides a preparation method of the high-strength concrete, which comprises the following steps:
(1) stirring and mixing river sand and crushed stone, adding ethylene bisoleic acid amide and N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Preferably, the weight ratio of the total weight of the river sand and the crushed stone in the step (1) to the ethylene bis-oleic amide and the N-methyl pyrrolidone is 100: 1-3: 0.5-1.
Most preferably, the weight ratio of the total weight of river sand and gravel to ethylene bis-oleamide and Ν -methyl pyrrolidone in step (1) is 100:2: 0.5.
The inventor surprisingly found in the research that: adding ethylene bis-oleic acid amide and N-methyl pyrrolidone into the concrete preparation step (1), mixing with river sand and crushed stone, and then mixing with cement to prepare the concrete with very high compressive strength; the compressive strength of the concrete is greatly improved compared with the concrete prepared by mixing river sand and macadam without adding ethylene bisoleic acid amide and N-methyl pyrrolidone in the step (1).
Has the advantages that: the invention provides a high-strength concrete with brand-new composition; the high-strength concrete prepared by the method has higher compressive strength; in addition, the high-strength concrete is prepared by taking the common river sand and broken stone as aggregates, and has the advantages of wide raw material source, simple preparation process and relatively low production cost.
Detailed Description
The present invention is further explained below with reference to specific examples, which do not limit the scope of the present invention.
Example 1 preparation of high Strength concrete
The raw materials comprise the following components in parts by weight: 250 portions of Portland cement with the reference number of 42.5; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a polycarboxylic acid water reducing agent; 80 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and crushed stone, adding ethylene bisoleic acid amide and N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture; wherein the weight ratio of the total weight of the river sand and the macadam to the ethylene bis-oleamide and the N-methyl pyrrolidone is 100:2: 0.5;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Example 2 preparation of high Strength concrete
The raw materials comprise the following components in parts by weight: 200 parts of Portland cement with the reference number of 42.5; 300 parts of river sand; 500 parts of crushed stone; 2 parts of a polycarboxylic acid water reducing agent; 70 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and crushed stone, adding ethylene bisoleic acid amide and N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture; wherein the weight ratio of the total weight of the medium river sand and the crushed stone to the ethylene bis-oleamide and N-methyl pyrrolidone is 100:3: 0.5;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
EXAMPLE 3 preparation of high Strength concrete
The raw materials comprise the following components in parts by weight: 300 parts of Portland cement with the reference number of 42.5; 400 parts of river sand; 700 parts of crushed stone; 2 parts of a polycarboxylic acid water reducing agent; 80 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and crushed stone, adding ethylene bisoleic acid amide and N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture; wherein the weight ratio of the total weight of the medium river sand and the crushed stone to the ethylene bis-oleamide and N-methyl pyrrolidone is 100:2: 1;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Comparative example 1 preparation of high-Strength concrete
The raw materials comprise the following components in parts by weight: 250 portions of Portland cement with the reference number of 42.5; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a polycarboxylic acid water reducing agent; 80 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and broken stones to obtain an aggregate mixture;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Comparative example 1 is different from example 1 in that in the step (1) of comparative example 1, ethylene bis-oleic amide and Ν -methyl pyrrolidone are not added, but river sand and crushed stone are directly mixed; in the step (1) of example 1, ethylene bis-oleic amide and Ν -methyl pyrrolidone were added and mixed with river sand and crushed stone.
Comparative example 2 preparation of high-Strength concrete
The raw materials comprise the following components in parts by weight: 250 portions of Portland cement with the reference number of 42.5; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a polycarboxylic acid water reducing agent; 80 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and broken stone, adding ethylene bis-oleamide, and continuously stirring and uniformly mixing to obtain an aggregate mixture; wherein the weight ratio of the total weight of the medium river sand and the crushed stone to the ethylene bis-oleamide is 100: 2.5;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Comparative example 2 is different from example 1 in that only ethylenebisoleamide is added to mix with river sand and crushed stone in step (1) of comparative example 2; in the step (1) of example 1, ethylene bis-oleic acid amide and Ν -methylpyrrolidone were added and mixed with river sand and crushed stone.
Comparative example 3 preparation of high-Strength concrete
The raw materials comprise the following components in parts by weight: 250 portions of Portland cement with the reference number of 42.5; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a polycarboxylic acid water reducing agent; 80 parts of water;
the river sand is river sand with the particle size of 0.8-1.0 mm; the crushed stone is crushed stone with the particle size of 10-12 mm;
the preparation method comprises the following steps:
(1) stirring and mixing river sand and macadam, adding N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture; wherein the weight ratio of the total weight of the river sand and the macadam to the weight of the N-methylpyrrolidinone amine is 100: 2.5;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
Comparative example 3 differs from example 1 in that only Ν -methyl pyrrolidone was added in step (1) of comparative example 3 to mix with river sand and crushed stone; in the step (1) of example 1, ethylene bis-oleic amide and Ν -methyl pyrrolidone were added and mixed with river sand and crushed stone.
The 28d compressive strength of the high-strength concrete prepared in the examples 1-3 and the comparative examples 1-3 is tested by referring to the method in GB/T50081 and 2019 concrete physical and mechanical property test method Standard; the test results are shown in Table 1.
| 28d compressive strength | |
| Example 1 high Strength concrete | 112MPa |
| Example 2 high Strength concrete | 104MPa |
| Example 3 high Strength concrete | 101MPa |
| Comparative example 1 high strength concrete | 58MPa |
| Comparative example 2 high strength concrete | 67MPa |
| Comparative example 3 high strength concrete | 72MPa |
As can be seen from the experimental data in Table 1, the 28d compressive strength of the high-strength concrete prepared in the examples 1-3 is greater than 100 MPa; this shows that the high-strength concrete prepared by the invention has very high compressive strength.
As can be seen from the experimental data in Table 1, the 28d compressive strength of the high-strength concrete prepared in example 1 is much higher than that of the high-strength concrete prepared in comparative example 1; the difference between the comparative example 1 and the example 1 is that the river sand and the crushed stone are directly mixed in the step (1) of the comparative example 1 without adding ethylene bis-oleic acid amide and N-methyl pyrrolidone; in the step (1) of example 1, ethylene bis-oleic amide and Ν -methyl pyrrolidone were added and mixed with river sand and crushed stone. This indicates that: whether ethylene bis-oleamide and N-methyl pyrrolidone are added in the step (1) of the preparation method of the high-strength concrete plays a decisive role in whether the concrete with very excellent compressive strength can be prepared; the research shows that in the preparation process of the high-strength concrete, the compressive strength of the concrete prepared by mixing ethylene bis-oleic acid amide and N-methyl pyrrolidone with river sand and crushed stone is greatly improved.
As can be seen from the experimental data in Table 1, the concrete prepared in comparative examples 2 and 3 has much lower compressive strength than that of example 1; the compressive strength of the concrete prepared in the comparative examples 2 and 3 is greatly improved in comparison with that of the concrete prepared in the comparative example 1, rather than the improvement of the concrete prepared in the example 1; this indicates that: in the preparation process of high-strength concrete, the compressive strength of the concrete prepared by mixing ethylene bis-oleic acid amide and N-methyl pyrrolidone with river sand and gravel can be greatly improved; the compressive strength of the prepared concrete cannot be greatly improved only by adding ethylene bis-oleate or N-methyl pyrrolidone to mix with river sand and crushed stone.
Claims (9)
1. The high-strength concrete is characterized by comprising the following components in parts by weight: 200-300 parts of cement; 300-400 parts of river sand; 500-700 parts of gravel; 2-4 parts of a water reducing agent; 70-80 parts of water.
The river sand is river sand with the particle size of 0.6-1.2 mm; the broken stone is broken stone with a particle size of 10-15 mm.
2. The high-strength concrete according to claim 1, characterized by comprising the following components in parts by weight: 250-280 parts of cement; 350-380 parts of river sand; 550-600 parts of broken stone; 3-4 parts of a water reducing agent; 70-80 parts of water.
3. The high-strength concrete according to claim 1, characterized by comprising the following components in parts by weight: 250 parts of cement; 350 parts of river sand; 600 parts of crushed stone; 3 parts of a water reducing agent; 80 parts of water.
4. The high strength concrete according to claim 1, wherein the cement is portland cement designated 42.5.
5. The high strength concrete according to claim 1, wherein the water reducing agent is selected from the group consisting of polycarboxylic acid water reducing agents.
6. The high-strength concrete as claimed in claim 1, wherein the river sand is river sand having a particle size of 0.8 to 1.0 mm; the broken stone is broken stone with a particle size of 10-12 mm.
7. The method for preparing the high-strength concrete according to any one of claims 1 to 6, comprising the steps of:
(1) stirring and mixing river sand and crushed stone, adding ethylene bisoleic acid amide and N-methyl pyrrolidone, and continuously stirring and uniformly mixing to obtain an aggregate mixture;
(2) and uniformly mixing the aggregate mixture, cement, a water reducing agent and water to obtain the high-strength concrete.
8. The method for preparing high-strength concrete according to claim 7, wherein the weight ratio of the total weight of the river sand and the crushed stone to the ethylene bis-oleic amide and N-methyl pyrrolidone in step (1) is 100: 1-3: 0.5-1.
9. The method for preparing high-strength concrete according to claim 8, wherein the weight ratio of the total weight of the river sand and the crushed stone to the ethylene bis-oleic amide and Ν -methyl pyrrolidone in step (1) is 100:2: 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210725574.XA CN114940606A (en) | 2022-06-24 | 2022-06-24 | High-strength concrete and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210725574.XA CN114940606A (en) | 2022-06-24 | 2022-06-24 | High-strength concrete and preparation method thereof |
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| CN202210725574.XA Pending CN114940606A (en) | 2022-06-24 | 2022-06-24 | High-strength concrete and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000064271A (en) * | 1998-08-20 | 2000-02-29 | Taisei Corp | Crushed stone charge promoting device, and joining method of joint part of underground continuous wall |
| CN104592720A (en) * | 2015-01-12 | 2015-05-06 | 安徽玉堂雨具有限公司 | Calcium carbonate filler capable of enhancing toughness of plastic and preparation method thereof |
| CN111253126A (en) * | 2020-01-18 | 2020-06-09 | 杭州申华混凝土有限公司 | Environment-friendly high-strength concrete and preparation method thereof |
| CN113087483A (en) * | 2021-04-16 | 2021-07-09 | 倪少瑜 | Low-shrinkage low-viscosity high-strength concrete and preparation method thereof |
-
2022
- 2022-06-24 CN CN202210725574.XA patent/CN114940606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000064271A (en) * | 1998-08-20 | 2000-02-29 | Taisei Corp | Crushed stone charge promoting device, and joining method of joint part of underground continuous wall |
| CN104592720A (en) * | 2015-01-12 | 2015-05-06 | 安徽玉堂雨具有限公司 | Calcium carbonate filler capable of enhancing toughness of plastic and preparation method thereof |
| CN111253126A (en) * | 2020-01-18 | 2020-06-09 | 杭州申华混凝土有限公司 | Environment-friendly high-strength concrete and preparation method thereof |
| CN113087483A (en) * | 2021-04-16 | 2021-07-09 | 倪少瑜 | Low-shrinkage low-viscosity high-strength concrete and preparation method thereof |
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