CN116425466A - Super-retarding concrete mixture for house construction and preparation method thereof - Google Patents
Super-retarding concrete mixture for house construction and preparation method thereof Download PDFInfo
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- CN116425466A CN116425466A CN202310381643.4A CN202310381643A CN116425466A CN 116425466 A CN116425466 A CN 116425466A CN 202310381643 A CN202310381643 A CN 202310381643A CN 116425466 A CN116425466 A CN 116425466A
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- 239000004567 concrete Substances 0.000 title claims abstract description 105
- 239000000203 mixture Substances 0.000 title claims abstract description 81
- 238000010276 construction Methods 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000004568 cement Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 230000000979 retarding effect Effects 0.000 claims abstract description 49
- RMTFNDVZYPHUEF-XZBKPIIZSA-N 3-O-methyl-D-glucose Chemical compound O=C[C@H](O)[C@@H](OC)[C@H](O)[C@H](O)CO RMTFNDVZYPHUEF-XZBKPIIZSA-N 0.000 claims abstract description 43
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 42
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 239000010881 fly ash Substances 0.000 claims abstract description 27
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 42
- 239000000835 fiber Substances 0.000 claims description 38
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 38
- 239000004575 stone Substances 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 16
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000002715 modification method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000004566 building material Substances 0.000 abstract description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 21
- 239000000126 substance Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 12
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 6
- 239000012615 aggregate Substances 0.000 description 6
- 229920005646 polycarboxylate Polymers 0.000 description 6
- 229940057838 polyethylene glycol 4000 Drugs 0.000 description 6
- 229940083466 soybean lecithin Drugs 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000009435 building construction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- WHQSYGRFZMUQGQ-UHFFFAOYSA-N n,n-dimethylformamide;hydrate Chemical compound O.CN(C)C=O WHQSYGRFZMUQGQ-UHFFFAOYSA-N 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003906 humectant Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011895 specific detection Methods 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
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/065—Polyacrylates; Polymethacrylates
- C04B16/0658—Polyacrylonitrile
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
- C04B2103/22—Set retarders
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building materials, and particularly discloses an ultra-retarding concrete mixture for house construction and a preparation method thereof. The super-retarding concrete mixture for house construction comprises the following components in parts by weight: 170-175 parts of water; 198-202 parts of cement; 84-86 parts of fly ash; 1800-1900 parts of aggregate; 5.25-5.3 parts of water reducer; 2.91-3.09 parts of retarder auxiliary agent; the retarder comprises at least sodium tripolyphosphate, methyl glucose ether and trimethylglycine. The invention has the advantages of improving the retarding performance of the concrete mixture and simultaneously keeping the concrete to have higher strength.
Description
Technical Field
The invention relates to the field of building materials, in particular to an ultra-retarding concrete mixture for house construction and a preparation method thereof.
Background
The concrete is a composite material formed by cementing aggregate into a whole by using cementing materials, is one of materials commonly used in building engineering, has the advantages of high plasticity, high strength, good durability and the like, and is widely applied to the construction of the building engineering.
Along with the development of technology, the height of a building is continuously improved, in high-rise building construction, a concrete mixture is often required to be poured in a mode of pumping the concrete mixture, so that the requirement on fluidity of the concrete mixture is higher, particularly, a distributing machine pipeline of the high-rise building is longer, if the concrete mixture is coagulated in the pipeline, the pipeline is blocked, the concrete mixture is difficult to clean, and the concrete mixture is required to have better retarding performance.
Generally, in order to improve the retarder performance of the concrete mixture, the retarder is added into the concrete mixture, and the conventional retarder system can play a role in retarding to a certain extent, but after the retarder is excessively long, the strength of the prepared concrete of the concrete mixture is reduced, the product quality is affected, and the shorter retarder time is difficult to meet the requirement of super high-rise building construction, so that there is room for improvement.
Disclosure of Invention
In order to improve the retarding performance of the concrete mixture and simultaneously maintain high strength of concrete, the application provides an ultra-retarding concrete mixture for house construction and a preparation method thereof.
In a first aspect, the present application provides a super retarding concrete mixture for house construction, which adopts the following technical scheme: the super-retarding concrete mixture for house construction comprises the following components in parts by weight:
170-175 parts of water;
198-202 parts of cement;
84-86 parts of fly ash;
1800-1900 parts of aggregate;
5.25-5.3 parts of water reducer;
2.91-3.09 parts of retarder auxiliary agent;
the retarder aid at least comprises sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
By adopting the technical scheme, the prepared super-retarding concrete mixture has super-long retarding time by at least comprising sodium tripolyphosphate, methyl glucose ether and trimethylglycine in the retarding aid, and the strength of the concrete formed after solidification is not obviously reduced, so that the effect of improving the retarding performance of the concrete mixture and simultaneously keeping the concrete to have higher strength is realized.
Among the retarder aids, sodium tripolyphosphate is an inorganic retarder, methyl glucose ether and trimethylglycine are humectant, the retarder effect is provided by sodium tripolyphosphate, and the moisture retention effect of methyl glucose ether and trimethylglycine is matched, so that moisture can be effectively locked, moisture evaporation is reduced, and the defect that the hydration reaction degree is insufficient finally due to the fact that the moisture evaporation is caused by too long retarder time in the prior art, so that the strength of concrete is affected is overcome.
In addition, by the special selection of methyl glucose ether and trimethylglycine, the retarding effect of sodium tripolyphosphate can be obviously improved, the retarding time can be greatly prolonged, excessive retarder is not needed to be added to prolong the retarding time, and the defect that hydration reaction cannot be carried out easily after excessive retarder is added to obtain longer coagulation time in the prior art is overcome.
Preferably, the retarding aid is a compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
By adopting the technical scheme, the retarding aid is formed by compounding sodium tripolyphosphate, methyl glucose ether and trimethylglycine, so that the retarding time of the concrete mixture is longer, the construction requirement is better met, the strength of the concrete formed after solidification is not obviously reduced, and the concrete can be better kept to have higher strength.
Preferably, the mass ratio of the sodium tripolyphosphate to the methyl glucose ether to the trimethylglycine is 0.38-0.42:1.95-2.05:0.58-0.62.
By adopting the technical scheme, the mass proportion range of the sodium tripolyphosphate, the methyl glucose ether and the trimethylglycine is selected, the adding amount of the sodium tripolyphosphate is about 0.2% of the cement dosage, the cement additive belongs to the conventional dosage range, the defect that hydration reaction cannot be carried out due to excessive inhibition caused by excessive dosage is avoided, the quality of the prepared concrete can be well ensured, the retarding time of a concrete mixture can be greatly prolonged under the condition that the adding amount of the sodium tripolyphosphate is not high, and the cement additive is better suitable for construction requirements.
Preferably, the mass ratio of the sodium tripolyphosphate to the methyl glucose ether to the trimethylglycine is 0.4:2:0.6.
by adopting the technical scheme, the effect of prolonging the retarding time of the concrete mixture is better by specifically selecting the mass proportion of sodium tripolyphosphate, methyl glucose ether and trimethylglycine, the strength of the concrete can be better maintained, the construction requirements of high-rise buildings can be better met, and the quality of the prepared concrete material is better.
Preferably, the aggregate is natural aggregate.
By adopting the technical scheme, the natural aggregate is adopted by the aggregate, so that the water absorption rate of the aggregate is lower, the fluidity of the concrete mixture can be better improved, and the aggregate can better drop to meet the requirements of high-rise building construction.
Preferably, the aggregate is a mixture of river sand and crushed stone.
By adopting the technical scheme, the prepared concrete has higher strength, better fluidity and better quality by compounding river sand and broken stone.
Preferably, the super-retarding concrete for house construction further comprises modified polyacrylonitrile fibers, and the modification method of the modified polyacrylonitrile fibers comprises the following steps:
immersing polyacrylonitrile fiber in an N, N-dimethylformamide aqueous solution for 10-15 seconds, and then cleaning the polyacrylonitrile fiber with clear water to obtain modified polyacrylonitrile fiber;
the concentration of the N, N-dimethylformamide aqueous solution is 1-2%.
By adopting the technical scheme, the strength of the concrete can be effectively improved by adding the polyacrylonitrile fiber, and the quality of the prepared concrete is better.
The polyacrylonitrile fiber is modified in the N, N-dimethylformamide water solution with the concentration of 1-2 percent, so that the surface of the polyacrylonitrile fiber is slightly corroded, the surface of the polyacrylonitrile fiber becomes coarser, the connection force with cement stone can be improved, the concrete is better reinforced, and the strength of the concrete is higher.
In a second aspect, the present application provides a preparation method of an ultra-retarding concrete mixture for house construction, which adopts the following technical scheme:
the preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), mixing water, a water reducing agent and a retarding aid, and uniformly stirring to obtain a solvent;
step 2), adding cement into the solvent, and uniformly stirring to obtain cement slurry;
and 3) adding the rest raw materials into the cement slurry, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Through adopting above-mentioned technical scheme, through adding cement after mixing water-reducing agent and retarder and water now for the effect of retarding is better, effectively delays cement hydration reaction, and the concrete mixture of preparation has longer retarding time.
In summary, the present application has the following beneficial effects:
1. because the retarder comprises at least sodium tripolyphosphate, methyl glucose ether and trimethylglycine, the prepared super retarder concrete mixture has super long retarder time, the strength of the concrete formed after solidification is not obviously reduced, and the effect of improving the retarder performance of the concrete mixture and simultaneously keeping the concrete to have higher strength is achieved.
2. In the application, the mass proportion range of sodium tripolyphosphate, methyl glucose ether and trimethylglycine is preferably selected, the adding amount of sodium tripolyphosphate is about 0.2% of the cement dosage, the cement dosage is in the conventional dosage range, the defect that hydration reaction cannot be carried out due to excessive inhibition caused by excessive dosage is avoided, the quality of the prepared concrete can be well ensured, the retarding time of a concrete mixture can be greatly prolonged under the condition that the adding amount of sodium tripolyphosphate is not high, and the cement mortar is well suitable for construction requirements.
3. In the application, the polyacrylonitrile fiber is preferably modified in the N, N-dimethylformamide water solution with the concentration of 1-2% so that the surface of the polyacrylonitrile fiber is slightly corroded, the surface of the polyacrylonitrile fiber is roughened, the connection force with cement stone can be improved, and therefore the concrete is better reinforced, and the strength of the concrete is higher.
Detailed Description
The present application is described in further detail below with reference to examples.
Example 1
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer and retarder aid.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 170kg of water, 5.25kg of water reducer, 0.38kg of sodium tripolyphosphate, 1.95kg of methyl glucose ether and 0.58kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
And 2) adding 198kg of cement into the solvent, stirring for 3min at the rotating speed of 120r/min, and uniformly stirring to obtain cement slurry.
And 3) adding 84kg of fly ash, 800kg of river sand and 1000kg of broken stone into the cement slurry, stirring for 8min at a rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Example 2
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer and retarder aid.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 172kg of water, 5.27kg of water reducer, 0.4kg of sodium tripolyphosphate, 2kg of methyl glucose ether and 0.6kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
And 2) adding 200kg of cement into the solvent, stirring for 3min at the rotating speed of 120r/min, and uniformly stirring to obtain cement slurry.
And 3) adding 85kg of fly ash, 815kg of river sand and 1035kg of broken stone into the cement slurry, stirring for 8min at a rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Example 3
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer and retarder aid.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 175kg of water, 5.3kg of water reducer, 0.42kg of sodium tripolyphosphate, 2.05kg of methyl glucose ether and 0.62kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
And 2) adding 202kg of cement into the solvent, stirring for 3min at the rotating speed of 120r/min, and uniformly stirring to obtain cement slurry.
And 3) adding 86kg of fly ash, 850kg of river sand and 1050kg of crushed stone into the cement slurry, stirring for 8min at a rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Example 4
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer, retarding aid and modified polyacrylonitrile fiber.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
Wherein the modified polyacrylonitrile fiber is formed by modifying polyacrylonitrile fiber:
wherein, the polyacrylonitrile fiber is purchased from Shandong Louisan engineering materials Co., ltd, and has a diameter of 0.15 μm and a length of 10mm.
The modification method of the modified polyacrylonitrile fiber comprises the following steps:
and (3) immersing the polyacrylonitrile fiber in an N, N-dimethylformamide aqueous solution with the concentration of 1% for 15s, then washing with clear water, and drying to obtain the modified polyacrylonitrile fiber.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 172kg of water, 5.27kg of water reducer, 0.4kg of sodium tripolyphosphate, 2kg of methyl glucose ether and 0.6kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
And 2) adding 200kg of cement into the solvent, stirring for 3min at the rotating speed of 120r/min, and uniformly stirring to obtain cement slurry.
And 3) adding 85kg of fly ash, 815kg of river sand, 1035kg of broken stone and 1.2kg of modified polyacrylonitrile fiber into the cement slurry, stirring for 8min at a rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Example 5
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer, retarding aid and modified polyacrylonitrile fiber.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
Wherein the modified polyacrylonitrile fiber is formed by modifying polyacrylonitrile fiber:
wherein, the polyacrylonitrile fiber is purchased from Shandong Louisan engineering materials Co., ltd, and has a diameter of 0.15 μm and a length of 10mm.
The modification method of the modified polyacrylonitrile fiber comprises the following steps:
and (3) immersing the polyacrylonitrile fiber in an N, N-dimethylformamide water solution with the concentration of 2% for 10s, then washing with clear water, and drying to obtain the modified polyacrylonitrile fiber.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 172kg of water, 5.27kg of water reducer, 0.4kg of sodium tripolyphosphate, 2kg of methyl glucose ether and 0.6kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
And 2) adding 200kg of cement into the solvent, stirring for 3min at the rotating speed of 120r/min, and uniformly stirring to obtain cement slurry.
And 3) adding 85kg of fly ash, 815kg of river sand, 1035kg of broken stone and 2kg of modified polyacrylonitrile fiber into the cement slurry, stirring for 8min at the rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Example 6
The super-retarding concrete mixture for house construction is prepared from the following components:
water, cement, fly ash, aggregate, water reducer, retarding aid and polyacrylonitrile fiber.
Wherein, the cement is purchased from Indelphinium cement Limited liability company, P.O42.5R, ordinary Portland cement.
Wherein, the fly ash is purchased from Xinhuawi trade limited company, the Guangzhou city, and the second-level fly ash.
Wherein the aggregate is a mixture of river sand and broken stone.
River sand is purchased from Hebei Hengyi building materials limited company, 8-10 meshes.
The crushed stone is purchased and placed in a forward stone field, the specification is 10-12mm, the needle-like content is 3%, and the apparent density is 2640kg/m 3 Bulk density 1390kg/m 3 The mud content is 0.4%.
The water reducer is a polycarboxylate water reducer and is purchased from Shandong Xin Hongyue chemical industry Co.
Wherein, the retarding aid is the compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
Wherein, sodium tripolyphosphate is purchased from Henan Ti year chemical products Co., ltd., CAS number: 13573-18-7.
Wherein, methyl glucose ether is purchased from the Dexin chemical industry Co., ltd., in Zhongshan, CAS number: 61849-72-7.
Wherein, trimethylglycine is purchased from Ji nan Tang Yi chemical Co., ltd., CAS number: 107-43-7.
Wherein, the polyacrylonitrile fiber is purchased from Shandong Louisan engineering materials Co., ltd, and has a diameter of 0.15 μm and a length of 10mm.
The preparation method of the super-retarding concrete mixture for house construction comprises the following steps:
step 1), 172kg of water, 5.27kg of water reducer, 0.4kg of sodium tripolyphosphate, 2kg of methyl glucose ether and 0.6kg of trimethylglycine are put into a stirring kettle, and the stirring is carried out for 10min at the rotating speed of 120r/min, so that the solvent is obtained.
Step 2), adding 200kg of cement into the solvent, stirring for 3min at a rotating speed of 120r/min, and uniformly stirring to obtain cement slurry;
and 3) adding 85kg of fly ash, 815kg of river sand, 1035kg of broken stone and 2kg of polyacrylonitrile fiber into the cement slurry, stirring for 8min at a rotating speed of 120r/min, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
Comparative example 1
The super retarding concrete mixture for house construction is different from example 2 only in that:
glycerol was used in an equivalent amount instead of methyl glucose ether.
Wherein, the glycerol is from commercial market, CAS number: 56-81-5.
Comparative example 2
The super retarding concrete mixture for house construction is different from example 2 only in that:
glycerol was used in place of trimethylglycine in equal amounts.
Wherein, the glycerol is from commercial market, CAS number: 56-81-5.
Comparative example 3
The super retarding concrete mixture for house construction is different from example 2 only in that:
glycerol was used in place of methyl glucose ether and trimethylglycine in equal amounts.
Wherein, the glycerol is from commercial market, CAS number: 56-81-5.
Comparative example 4
The super retarding concrete mixture for house construction is different from example 2 only in that:
the methyl glucose ether was replaced with an equal amount of soybean lecithin.
Among them, soybean lecithin is commercially available and has CAS number: 8002-43-5.
Comparative example 5
The super retarding concrete mixture for house construction is different from example 2 only in that:
the same amount of soybean lecithin is used to replace trimethylglycine.
Among them, soybean lecithin is commercially available and has CAS number: 8002-43-5.
Comparative example 6
The super retarding concrete mixture for house construction is different from example 2 only in that:
the same amount of soybean lecithin is used to replace methyl glucose ether and trimethylglycine.
Among them, soybean lecithin is commercially available and has CAS number: 8002-43-5.
Comparative example 7
The super retarding concrete mixture for house construction is different from example 2 only in that:
polyethylene glycol 4000 was used in place of methyl glucose ether in equal amounts.
Among them, polyethylene glycol 4000 is commercially available and has CAS number: 25322-68-3.
Comparative example 8
The super retarding concrete mixture for house construction is different from example 2 only in that:
polyethylene glycol 4000 was used in place of trimethylglycine in equal amounts.
Among them, polyethylene glycol 4000 is commercially available and has CAS number: 25322-68-3.
Comparative example 9
The super retarding concrete mixture for house construction is different from example 2 only in that:
polyethylene glycol 4000 was used in place of methyl glucose ether and trimethylglycine in equal amounts.
Among them, polyethylene glycol 4000 is commercially available and has CAS number: 25322-68-3.
Comparative example 10
The super retarding concrete mixture for house construction is different from example 2 only in that:
the addition of methyl glucose ether and trimethylglycine was omitted.
Experiment 1
The compressive strength of concrete samples prepared from the super-retarding concrete mixture for house construction of each example and comparative example was measured according to GB/T50081-2019 Standard for test method of physical and mechanical properties of concrete.
Experiment 2
The slump, initial setting time and final setting time of the super-retarding concrete mixture for house construction prepared in each example and comparative example were detected according to GBT50080-2016 Standard of common concrete mixing Property experiment method.
The specific detection data of experiments 1 and 2 are shown in Table 1.
TABLE 1
According to the data comparison in the table 1, the prepared concrete mixture has longer initial setting time and final setting time by compounding sodium tripolyphosphate, methyl glucose ether and trimethylglycine, and the final setting time breaks through more than 24 hours, so that the concrete mixture has good construction performance, better meets the requirements of high-rise building construction, and the prepared concrete has higher compressive strength, is similar to the concrete strength when only sodium tripolyphosphate is added, and achieves the effect of prolonging the retarding time without obvious influence on the strength.
By adding the modified polyacrylonitrile fiber, the compressive strength of the concrete can be effectively improved, and compared with the common polyacrylonitrile fiber, the compressive strength of the concrete is improved, and the quality of the prepared concrete is better.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (8)
1. The super-retarding concrete mixture for house construction is characterized in that: comprises the following components in parts by mass:
170-175 parts of water;
198-202 parts of cement;
84-86 parts of fly ash;
1800-1900 parts of aggregate;
5.25-5.3 parts of water reducer;
2.91-3.09 parts of retarder auxiliary agent;
the retarder aid at least comprises sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
2. The super retarding concrete mixture for house construction according to claim 1, wherein: the retarding aid is a compound of sodium tripolyphosphate, methyl glucose ether and trimethylglycine.
3. The super retarding concrete mixture for house construction according to claim 2, wherein: the mass ratio of the sodium tripolyphosphate to the methyl glucose ether to the trimethylglycine is 0.38-0.42:1.95-2.05:0.58-0.62.
4. A super retarding concrete mix for house construction according to claim 3, characterized in that: the mass ratio of the sodium tripolyphosphate to the methyl glucose ether to the trimethylglycine is 0.4:2:0.6.
5. the super retarding concrete mixture for house construction according to claim 1, wherein: the aggregate is natural aggregate.
6. The super retarding concrete mixture for house construction according to claim 5, wherein: the aggregate is a mixture of river sand and broken stone.
7. The super retarding concrete mixture for house construction according to claim 1, wherein: the super-retarding concrete for house construction further comprises modified polyacrylonitrile fibers, and the modification method of the modified polyacrylonitrile fibers comprises the following steps:
immersing polyacrylonitrile fiber in an N, N-dimethylformamide aqueous solution for 10-15 seconds, and then cleaning the polyacrylonitrile fiber with clear water to obtain modified polyacrylonitrile fiber;
the concentration of the N, N-dimethylformamide aqueous solution is 1-2%.
8. A method for preparing the super retarding concrete mixture for house construction according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
step 1), mixing water, a water reducing agent and a retarding aid, and uniformly stirring to obtain a solvent;
step 2), adding cement into the solvent, and uniformly stirring to obtain cement slurry;
and 3) adding the rest raw materials into the cement slurry, and uniformly stirring to obtain the super-retarding concrete mixture for house construction.
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| US4414031A (en) * | 1981-03-20 | 1983-11-08 | Ametex Ag | Fiber-containing products made with hydraulic binder agents |
| KR20110008394A (en) * | 2009-07-20 | 2011-01-27 | 김흠 | Water permeable pavement compositions and working method thereby |
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| CN111592252A (en) * | 2020-05-30 | 2020-08-28 | 江苏隆昌混凝土有限公司 | High-performance anti-cracking impact-resistant modified concrete and preparation method thereof |
| CN113998952A (en) * | 2021-11-18 | 2022-02-01 | 广州市建筑集团混凝土有限公司 | High-strength concrete mixture, preparation method thereof and concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414031A (en) * | 1981-03-20 | 1983-11-08 | Ametex Ag | Fiber-containing products made with hydraulic binder agents |
| KR20110008394A (en) * | 2009-07-20 | 2011-01-27 | 김흠 | Water permeable pavement compositions and working method thereby |
| CN111153655A (en) * | 2020-01-17 | 2020-05-15 | 重庆华西易通建设股份有限公司 | C60 pump concrete and preparation method thereof |
| CN111592252A (en) * | 2020-05-30 | 2020-08-28 | 江苏隆昌混凝土有限公司 | High-performance anti-cracking impact-resistant modified concrete and preparation method thereof |
| CN113998952A (en) * | 2021-11-18 | 2022-02-01 | 广州市建筑集团混凝土有限公司 | High-strength concrete mixture, preparation method thereof and concrete |
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