CN113800844A - C35 self-compacting concrete and preparation method thereof - Google Patents
C35 self-compacting concrete and preparation method thereof Download PDFInfo
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- CN113800844A CN113800844A CN202010556202.XA CN202010556202A CN113800844A CN 113800844 A CN113800844 A CN 113800844A CN 202010556202 A CN202010556202 A CN 202010556202A CN 113800844 A CN113800844 A CN 113800844A
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- 239000011376 self-consolidating concrete Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 65
- 238000002156 mixing Methods 0.000 claims abstract description 52
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002893 slag Substances 0.000 claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 28
- 239000010881 fly ash Substances 0.000 claims abstract description 28
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 28
- 239000011707 mineral Substances 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 28
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 27
- 239000004576 sand Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims abstract description 17
- 229940048086 sodium pyrophosphate Drugs 0.000 claims abstract description 17
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims abstract description 17
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 69
- 238000005303 weighing Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000004575 stone Substances 0.000 claims description 23
- VFLDPWHFBUODDF-FCXRPNKRSA-N curcumin Chemical compound C1=C(O)C(OC)=CC(\C=C\C(=O)CC(=O)\C=C\C=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-FCXRPNKRSA-N 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- BONIIQYTWOPUQI-UHFFFAOYSA-N 4-nitroisoindole-1,3-dione Chemical compound [O-][N+](=O)C1=CC=CC2=C1C(=O)NC2=O BONIIQYTWOPUQI-UHFFFAOYSA-N 0.000 claims description 10
- 229940109262 curcumin Drugs 0.000 claims description 10
- 235000012754 curcumin Nutrition 0.000 claims description 10
- 239000004148 curcumin Substances 0.000 claims description 10
- VFLDPWHFBUODDF-UHFFFAOYSA-N diferuloylmethane Natural products C1=C(O)C(OC)=CC(C=CC(=O)CC(=O)C=CC=2C=C(OC)C(O)=CC=2)=C1 VFLDPWHFBUODDF-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000001804 emulsifying effect Effects 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 claims description 5
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 5
- 229930006000 Sucrose Natural products 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims 1
- 238000005056 compaction Methods 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 230000036571 hydration Effects 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 2
- 239000006188 syrup Substances 0.000 abstract description 2
- 235000020357 syrup Nutrition 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 abstract 1
- 244000005700 microbiome Species 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 4
- 238000009395 breeding Methods 0.000 description 4
- 230000001488 breeding effect Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 229920005646 polycarboxylate Polymers 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000008030 superplasticizer Substances 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 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
Abstract
The invention relates to concrete, in particular to C35 self-compacting concrete and a preparation method thereof; the cement mortar comprises 500 parts of cement, 120 parts of 100-containing polyacrylamide, 700 parts of sand, 300 parts of gravel 295-containing materials, 190 parts of iron slag 165-containing materials, 50-60 parts of sodium pyrophosphate, 108 parts of fly ash 105-containing materials, 90-93 parts of mineral powder, 5.25-5.95 parts of additives, 380 parts of water 370-containing materials and 110 parts of sugar water; the density is greatly increased by mixing the iron slag, so that the slump flow of the concrete is improved; the iron slag, the fly ash and the mineral powder are uniformly distributed after being stirred and mixed for a plurality of times under the action of the dispersant sodium pyrophosphate; the fluidity of the concrete is improved through the polyacrylamide, so that the concrete can flow along a flow channel in the template, and the self-compaction is realized without vibration; and finally, the syrup is utilized to improve the fluidity and the compactness of the concrete, reduce the hydration heat, reduce the temperature cracks and enhance the strength of the cured concrete.
Description
Technical Field
The invention relates to concrete, in particular to C35 self-compacting concrete and a preparation method thereof.
Background
Concrete is a material for casting various buildings. But ordinary concrete mobility is not good, and we can see at many building sites that construction worker uses the vibrator to vibrate the concrete paste in the template for the concrete can get into the inside of template as far as possible.
The defects of the prior art are as follows: the vibration generates huge noise, which affects the health of construction workers; the vibration requires a lot of time, resulting in prolonged concrete pouring time; a large amount of bubbles may be generated by vibration, so that a pitted surface is formed after the concrete is cured; the high-strength and high-frequency vibration can damage the formwork built by the steel bars and the plates.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides C35 self-compacting concrete.
The technical scheme of the invention is as follows:
the C35 self-compacting concrete comprises the following components in parts by weight:
500 parts of cement, 100 parts of polyacrylamide, 700 parts of sand, 300 parts of gravel 295, 190 parts of iron slag, 50-60 parts of sodium pyrophosphate, 108 parts of fly ash 105-containing materials, 90-93 parts of mineral powder, 5.25-5.95 parts of additives, 380 parts of water 370-containing materials and 110 parts of sugar water; wherein the additive consists of a polycarboxylic acid water reducing agent, 3-nitrophthalimide and curcumin.
Specifically, the weight ratio of the polycarboxylate superplasticizer, the 3-nitrophthalimide and the curcumin is 7: 1: 1.
specifically, the particle size range of the steel slag is 5-25mm, and the apparent density is 3450Kg/m 3; the cement is P.042.5R portland cement, and the apparent density is 3080Kg/m 3; the sand is the sand in the zone II, and the apparent density is 2680Kg/m 3; the crushed stone is 5-25mm continuous graded crushed stone, and the apparent density is 2800Kg/m 3; the fly ash is F-class II fly ash, and the density is 2150Kg/m 3; the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3; the steel slag has a particle size range of 5-25mm and an apparent density of 3450Kg/m 3.
Specifically, the sugar water is liquid or paste obtained by heating and mixing soft white sugar and deionized water according to the weight ratio of 1: 2.
A preparation method of C35 self-compacting concrete comprises the following steps:
weighing iron slag, fly ash and mineral powder, and heating and drying; because the materials are likely to be wet by water and easy to breed microorganisms in storage and transportation processes, the materials can be killed and dried by heating and drying in order to prevent the microorganisms from possibly breeding in a large amount after the concrete is cured;
weighing sodium pyrophosphate, and mixing with the material obtained in the step one;
weighing water, putting the material obtained in the step two into water, and stirring and mixing; the addition of sodium pyrophosphate can improve the wetting speed of the materials and the dispersion in water;
step four, weighing cement, sand, broken stone and an additive, adding the cement, sand, broken stone and additive into the mixture obtained in the step three, and further stirring and mixing to obtain a material A for later use;
step five, weighing polyacrylamide and sugar water, and mixing the polyacrylamide and the sugar water to obtain a material B for later use;
and step six, uniformly mixing the material A and the material B10 minutes before concrete pouring to obtain the self-compacting concrete.
Specifically, the heating and drying treatment method in the first step comprises the following steps: three materials (mixed liquid can be respectively put in) of iron slag, fly ash and mineral powder are put into a conveyer belt and are flattened to be 1 cm thick, and one section of the conveyer belt is heated by far infrared rays, so that the temperature of the materials is raised to 100 ℃ or higher than 100 ℃ for 10 seconds. The far infrared heating mode is adopted, the air temperature cannot be greatly increased, the heat source is not in contact with materials, and the abrasion of heat source parts is not easy to cause.
Specifically, the step two adopts a vibration disc for mixing, no liquid is lubricated at this time, and if stirring and mixing are adopted, a stirring device is easily abraded.
Specifically, in the third step, a stirring tank is adopted for stirring and mixing, the stirring speed is 12 revolutions per minute, the stirring time is 15 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fourth step, a stirring tank is adopted for stirring and mixing, the stirring speed is 40 revolutions per minute, the stirring time is 20 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fifth step, the polyacrylamide and the sugar water are put into an emulsifying machine to be stirred, mixed and emulsified, and the polyacrylamide and the sugar water are mixed with each other through a strong mechanical action without reducing the fluidity of the sugar water.
The invention has the beneficial effects that: the density is greatly increased by mixing the iron slag, so that the slump flow of the concrete is improved; the iron slag, the fly ash and the mineral powder are uniformly distributed after being stirred and mixed for a plurality of times under the action of the dispersant sodium pyrophosphate; the fluidity of the concrete is improved through the polyacrylamide, so that the concrete can flow along a flow channel in the template, and the self-compaction is realized without vibration; and finally, the syrup is utilized to improve the fluidity and the compactness of the concrete, reduce the hydration heat, reduce the temperature cracks and enhance the strength of the cured concrete.
Detailed Description
The following is further described in conjunction with the detailed description:
example 1
The C35 self-compacting concrete comprises the following components in parts by weight:
500 parts of cement, 100 parts of polyacrylamide, 700 parts of sand, 295 parts of crushed stone, 165 parts of iron slag, 50 parts of sodium pyrophosphate, 105 parts of fly ash, 90 parts of mineral powder, 5.25 parts of an additive, 370 parts of water and 100 parts of sugar water; wherein the additive consists of a polycarboxylic acid water reducing agent, 3-nitrophthalimide and curcumin.
Specifically, the weight ratio of the polycarboxylate superplasticizer, the 3-nitrophthalimide and the curcumin is 7: 1: 1.
specifically, the particle size range of the steel slag is 5-25mm, and the apparent density is 3450Kg/m 3; the cement is P.042.5R portland cement, and the apparent density is 3080Kg/m 3; the sand is the sand in the zone II, and the apparent density is 2680Kg/m 3; the crushed stone is 5-25mm continuous graded crushed stone, and the apparent density is 2800Kg/m 3; the fly ash is F-class II fly ash, and the density is 2150Kg/m 3; the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3; the steel slag has a particle size range of 5-25mm and an apparent density of 3450Kg/m 3.
Specifically, the sugar water is liquid or paste obtained by heating and mixing soft white sugar and deionized water according to the weight ratio of 1: 2.
A preparation method of C35 self-compacting concrete comprises the following steps:
weighing iron slag, fly ash and mineral powder, and heating and drying; because the materials are likely to be wet by water and easy to breed microorganisms in storage and transportation processes, the materials can be killed and dried by heating and drying in order to prevent the microorganisms from possibly breeding in a large amount after the concrete is cured;
weighing sodium pyrophosphate, and mixing with the material obtained in the step one;
weighing water, putting the material obtained in the step two into water, and stirring and mixing; the addition of sodium pyrophosphate can improve the wetting speed of the materials and the dispersion in water;
step four, weighing cement, sand, broken stone and an additive, adding the cement, sand, broken stone and additive into the mixture obtained in the step three, and further stirring and mixing to obtain a material A for later use;
step five, weighing polyacrylamide and sugar water, and mixing the polyacrylamide and the sugar water to obtain a material B for later use;
and step six, uniformly mixing the material A and the material B10 minutes before concrete pouring to obtain the self-compacting concrete.
Specifically, the heating and drying treatment method in the first step comprises the following steps: three materials (mixed liquid can be respectively put in) of iron slag, fly ash and mineral powder are put into a conveyer belt and are flattened to be 1 cm thick, and one section of the conveyer belt is heated by far infrared rays, so that the temperature of the materials is raised to 100 ℃ or higher than 100 ℃ for 10 seconds. The far infrared heating mode is adopted, the air temperature cannot be greatly increased, the heat source is not in contact with materials, and the abrasion of heat source parts is not easy to cause.
Specifically, the step two adopts a vibration disc for mixing, no liquid is lubricated at this time, and if stirring and mixing are adopted, a stirring device is easily abraded.
Specifically, in the third step, a stirring tank is adopted for stirring and mixing, the stirring speed is 12 revolutions per minute, the stirring time is 15 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fourth step, a stirring tank is adopted for stirring and mixing, the stirring speed is 40 revolutions per minute, the stirring time is 20 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fifth step, the polyacrylamide and the sugar water are put into an emulsifying machine to be stirred, mixed and emulsified, and the polyacrylamide and the sugar water are mixed with each other through a strong mechanical action without reducing the fluidity of the sugar water.
Example 2
The C35 self-compacting concrete comprises the following components in parts by weight:
500 parts of cement, 120 parts of polyacrylamide, 700 parts of sand, 300 parts of crushed stone, 190 parts of iron slag, 60 parts of sodium pyrophosphate, 108 parts of fly ash, 93 parts of mineral powder, 5.95 parts of an additive, 380 parts of water and 110 parts of sugar water; wherein the additive consists of a polycarboxylic acid water reducing agent, 3-nitrophthalimide and curcumin.
Specifically, the weight ratio of the polycarboxylate superplasticizer, the 3-nitrophthalimide and the curcumin is 7: 1: 1.
specifically, the particle size range of the steel slag is 5-25mm, and the apparent density is 3450Kg/m 3; the cement is P.042.5R portland cement, and the apparent density is 3080Kg/m 3; the sand is the sand in the zone II, and the apparent density is 2680Kg/m 3; the crushed stone is 5-25mm continuous graded crushed stone, and the apparent density is 2800Kg/m 3; the fly ash is F-class II fly ash, and the density is 2150Kg/m 3; the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3; the steel slag has a particle size range of 5-25mm and an apparent density of 3450Kg/m 3.
Specifically, the sugar water is liquid or paste obtained by heating and mixing soft white sugar and deionized water according to the weight ratio of 1: 2.
A preparation method of C35 self-compacting concrete comprises the following steps:
weighing iron slag, fly ash and mineral powder, and heating and drying; because the materials are likely to be wet by water and easy to breed microorganisms in storage and transportation processes, the materials can be killed and dried by heating and drying in order to prevent the microorganisms from possibly breeding in a large amount after the concrete is cured;
weighing sodium pyrophosphate, and mixing with the material obtained in the step one;
weighing water, putting the material obtained in the step two into water, and stirring and mixing; the addition of sodium pyrophosphate can improve the wetting speed of the materials and the dispersion in water;
step four, weighing cement, sand, broken stone and an additive, adding the cement, sand, broken stone and additive into the mixture obtained in the step three, and further stirring and mixing to obtain a material A for later use;
step five, weighing polyacrylamide and sugar water, and mixing the polyacrylamide and the sugar water to obtain a material B for later use;
and step six, uniformly mixing the material A and the material B10 minutes before concrete pouring to obtain the self-compacting concrete.
Specifically, the heating and drying treatment method in the first step comprises the following steps: three materials (mixed liquid can be respectively put in) of iron slag, fly ash and mineral powder are put into a conveyer belt and are flattened to be 1 cm thick, and one section of the conveyer belt is heated by far infrared rays, so that the temperature of the materials is raised to 100 ℃ or higher than 100 ℃ for 10 seconds. The far infrared heating mode is adopted, the air temperature cannot be greatly increased, the heat source is not in contact with materials, and the abrasion of heat source parts is not easy to cause.
Specifically, the step two adopts a vibration disc for mixing, no liquid is lubricated at this time, and if stirring and mixing are adopted, a stirring device is easily abraded.
Specifically, in the third step, a stirring tank is adopted for stirring and mixing, the stirring speed is 12 revolutions per minute, the stirring time is 15 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fourth step, a stirring tank is adopted for stirring and mixing, the stirring speed is 40 revolutions per minute, the stirring time is 20 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fifth step, the polyacrylamide and the sugar water are put into an emulsifying machine to be stirred, mixed and emulsified, and the polyacrylamide and the sugar water are mixed with each other through a strong mechanical action without reducing the fluidity of the sugar water.
Example 3
The C35 self-compacting concrete comprises the following components in parts by weight:
500 parts of cement, 110 parts of polyacrylamide, 700 parts of sand, 298 parts of crushed stone, 175 parts of iron slag, 55 parts of sodium pyrophosphate, 106 parts of fly ash, 91 parts of mineral powder, 5.55 parts of an additive, 375 parts of water and 105 parts of sugar water; wherein the additive consists of a polycarboxylic acid water reducing agent, 3-nitrophthalimide and curcumin.
Specifically, the weight ratio of the polycarboxylate superplasticizer, the 3-nitrophthalimide and the curcumin is 7: 1: 1.
specifically, the particle size range of the steel slag is 5-25mm, and the apparent density is 3450Kg/m 3; the cement is P.042.5R portland cement, and the apparent density is 3080Kg/m 3; the sand is the sand in the zone II, and the apparent density is 2680Kg/m 3; the crushed stone is 5-25mm continuous graded crushed stone, and the apparent density is 2800Kg/m 3; the fly ash is F-class II fly ash, and the density is 2150Kg/m 3; the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3; the steel slag has a particle size range of 5-25mm and an apparent density of 3450Kg/m 3.
Specifically, the sugar water is liquid or paste obtained by heating and mixing soft white sugar and deionized water according to the weight ratio of 1: 2.
A preparation method of C35 self-compacting concrete comprises the following steps:
weighing iron slag, fly ash and mineral powder, and heating and drying; because the materials are likely to be wet by water and easy to breed microorganisms in storage and transportation processes, the materials can be killed and dried by heating and drying in order to prevent the microorganisms from possibly breeding in a large amount after the concrete is cured;
weighing sodium pyrophosphate, and mixing with the material obtained in the step one;
weighing water, putting the material obtained in the step two into water, and stirring and mixing; the addition of sodium pyrophosphate can improve the wetting speed of the materials and the dispersion in water;
step four, weighing cement, sand, broken stone and an additive, adding the cement, sand, broken stone and additive into the mixture obtained in the step three, and further stirring and mixing to obtain a material A for later use;
step five, weighing polyacrylamide and sugar water, and mixing the polyacrylamide and the sugar water to obtain a material B for later use;
and step six, uniformly mixing the material A and the material B10 minutes before concrete pouring to obtain the self-compacting concrete.
Specifically, the heating and drying treatment method in the first step comprises the following steps: three materials (mixed liquid can be respectively put in) of iron slag, fly ash and mineral powder are put into a conveyer belt and are flattened to be 1 cm thick, and one section of the conveyer belt is heated by far infrared rays, so that the temperature of the materials is raised to 100 ℃ or higher than 100 ℃ for 10 seconds. The far infrared heating mode is adopted, the air temperature cannot be greatly increased, the heat source is not in contact with materials, and the abrasion of heat source parts is not easy to cause.
Specifically, the step two adopts a vibration disc for mixing, no liquid is lubricated at this time, and if stirring and mixing are adopted, a stirring device is easily abraded.
Specifically, in the third step, a stirring tank is adopted for stirring and mixing, the stirring speed is 12 revolutions per minute, the stirring time is 15 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fourth step, a stirring tank is adopted for stirring and mixing, the stirring speed is 40 revolutions per minute, the stirring time is 20 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
Specifically, in the fifth step, the polyacrylamide and the sugar water are put into an emulsifying machine to be stirred, mixed and emulsified, and the polyacrylamide and the sugar water are mixed with each other through a strong mechanical action without reducing the fluidity of the sugar water.
Experimental data
Examples 1-3 and comparative example (ordinary C35 self-compacting concrete) were subjected to V-hopper and filling box experiments with the following data:
| v type funnel experiment (second) | Filling Box experiment (%) | |
| Example 1 | 6-11 | 91-100 |
| Example 2 | 8-12 | 94-100 |
| Example 3 | 7-10 | 92-100 |
| Comparative example | 8-12 | 90-100 |
Compared with the comparative example, the concrete obtained by the invention has better filling capacity and steel bar clearance passing capacity.
The foregoing embodiments and description have been presented only to illustrate the principles and preferred embodiments of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed.
Claims (10)
1. A C35 self-compacting concrete, characterized in that: the paint comprises the following components in parts by weight:
500 parts of cement, 100 parts of polyacrylamide, 700 parts of sand, 300 parts of gravel 295, 190 parts of iron slag, 50-60 parts of sodium pyrophosphate, 108 parts of fly ash 105-containing materials, 90-93 parts of mineral powder, 5.25-5.95 parts of additives, 380 parts of water 370-containing materials and 110 parts of sugar water; wherein the additive consists of a polycarboxylic acid water reducing agent, 3-nitrophthalimide and curcumin.
2. The C35 self-compacting concrete according to claim 1, wherein: the weight ratio of the polycarboxylic acid water reducing agent to the 3-nitrophthalimide to the curcumin is 7: 1: 1.
3. the C35 self-compacting concrete according to claim 1, wherein: the particle size range of the steel slag is 5-25mm, and the apparent density is 3450Kg/m 3; the cement is P.042.5R portland cement, and the apparent density is 3080Kg/m 3; the sand is the sand in the zone II, and the apparent density is 2680Kg/m 3; the crushed stone is 5-25mm continuous graded crushed stone, and the apparent density is 2800Kg/m 3; the fly ash is F-class II fly ash, and the density is 2150Kg/m 3; the mineral powder is S95 grade mineral powder, and the density is 2880Kg/m 3; the steel slag has a particle size range of 5-25mm and an apparent density of 3450Kg/m 3.
4. The C35 self-compacting concrete according to claim 1, wherein: the sugar water is liquid or paste obtained by heating and mixing soft white sugar and deionized water according to the weight ratio of 1: 2.
5. A preparation method of C35 self-compacting concrete is characterized by comprising the following steps: it comprises the following steps:
weighing iron slag, fly ash and mineral powder, and heating and drying;
weighing sodium pyrophosphate, and mixing with the material obtained in the step one;
weighing water, putting the material obtained in the step two into water, and stirring and mixing;
step four, weighing cement, sand, broken stone and an additive, adding the cement, sand, broken stone and additive into the mixture obtained in the step three, and further stirring and mixing to obtain a material A for later use;
step five, weighing polyacrylamide and sugar water, and mixing the polyacrylamide and the sugar water to obtain a material B for later use;
and step six, uniformly mixing the material A and the material B10 minutes before concrete pouring to obtain the self-compacting concrete.
6. The method for preparing the C35 self-compacting concrete according to claim 5, wherein: the heating and drying treatment method in the first step comprises the following steps: three materials of iron slag, fly ash and mineral powder are put into a conveyer belt and are spread to be 1 cm thick, and one section of the conveyer belt is heated by far infrared rays, so that the temperature of the materials is raised to 100 ℃ or higher than 100 ℃ for 10 seconds.
7. The method for preparing the C35 self-compacting concrete according to claim 6, wherein: and in the second step, a vibrating disk is adopted for mixing.
8. The method for preparing the C35 self-compacting concrete according to claim 7, wherein: and in the third step, a stirring tank is adopted for stirring and mixing, the stirring speed is 12 revolutions per minute, the stirring time is 15 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
9. The method for preparing the C35 self-compacting concrete according to claim 8, wherein: and in the fourth step, a stirring tank is adopted for stirring and mixing, the stirring speed is 40 revolutions per minute, the stirring time is 20 minutes, compressed air is periodically sprayed into the insert slurry of the air cannon during the stirring period, the frequency is once every 12 seconds, and the single compressed air amount is 0.4 cubic meter.
10. The method for preparing the C35 self-compacting concrete according to claim 9, wherein: and step five, putting the polyacrylamide and the sugar water into an emulsifying machine, stirring, mixing and emulsifying.
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