CN112645629A - Polycarboxylate superplasticizer for recycled aggregate concrete - Google Patents
Polycarboxylate superplasticizer for recycled aggregate concrete Download PDFInfo
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- CN112645629A CN112645629A CN202011005743.XA CN202011005743A CN112645629A CN 112645629 A CN112645629 A CN 112645629A CN 202011005743 A CN202011005743 A CN 202011005743A CN 112645629 A CN112645629 A CN 112645629A
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- water
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- mother liquor
- polycarboxylic acid
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- 229920005646 polycarboxylate Polymers 0.000 title claims abstract description 11
- 239000008030 superplasticizer Substances 0.000 title claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 239000012452 mother liquor Substances 0.000 claims abstract description 43
- 239000002253 acid Substances 0.000 claims abstract description 39
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 29
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 15
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 15
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 92
- 238000006243 chemical reaction Methods 0.000 claims description 25
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 19
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 claims description 16
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 15
- -1 methyl propenyl Chemical group 0.000 claims description 9
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 9
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- ALRHLSYJTWAHJZ-UHFFFAOYSA-N 3-hydroxypropionic acid Chemical compound OCCC(O)=O ALRHLSYJTWAHJZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229960002163 hydrogen peroxide Drugs 0.000 claims 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 238000004321 preservation Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 4
- 238000004448 titration Methods 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Images
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
- 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a polycarboxylic acid water reducing agent for recycled aggregate concrete, which comprises water, a polycarboxylic acid water reducing mother liquor, a polycarboxylic acid slump retaining mother liquor, sodium gluconate and an air entraining agent; the polycarboxylate superplasticizer for the recycled aggregate concrete takes three basic raw materials of water reducing mother liquor, slump loss prevention mother liquor and sodium gluconate as components, determines the optimal titration sequence and the optimal component proportion, and has the advantages of lowest cost and highest profit margin on the basis of ensuring the performance of the recycled aggregate concrete.
Description
Technical Field
The invention mainly relates to the technical field of polycarboxylic acid water reducing agents, and particularly relates to a polycarboxylic acid water reducing agent for recycled aggregate concrete.
Background
In order to realize sustainable development of the building industry, green construction is always a hot topic in recent years, and the cyclic utilization of resources has important significance for promoting transformation and upgrading of the building industry to the green construction direction and improving quality and efficiency. On one hand, along with the high-speed development of the building industry, the demand on building raw materials is increased, the coarse and fine aggregates in the building raw materials are mainly extracted from natural sandstone materials, so that the ecological environment is damaged, the resource is exhausted, the construction cost is increased, the development of the building industry is restricted to a certain extent, and the contradiction can be effectively relieved by replacing the natural sandstone materials with the regenerated aggregates. On the other hand, along with the implementation of projects such as urban rural area transformation, dangerous building removal and the like, a large amount of construction waste is produced at the time of transportation, and is crushed, sieved, recycled and reused, so that natural sand stones are replaced in concrete production, and resources are recycled and reused.
Compared with the common concrete of natural sand and stone materials, the recycled aggregate concrete has the defects that the concrete slump loss caused by the fact that the aggregates are easy to absorb water is fast, particularly in the long-distance transportation process, the concrete slump is rapidly reduced, the pumping performance and the working performance of the concrete on a construction site are poor, the concrete setting time is short, the concrete is easy to block, and the concrete can only be treated as waste products, so that the waste is caused. The use of the common water reducing agent is not enough to solve the problem, and the technical problem can be obviously improved by the invention.
Disclosure of Invention
The invention mainly provides a polycarboxylic acid water reducing agent for recycled aggregate concrete, which is used for solving the technical problems in the background technology.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a polycarboxylate water reducing agent for recycled aggregate concrete comprises water, polycarboxylate water reducing mother liquor, polycarboxylate slump retaining mother liquor, sodium gluconate and an air entraining agent;
the water accounts for 80-90% of the water reducing agent in parts by weight;
the polycarboxylic acid water reducing mother liquor accounts for 10-20% of the water reducing agent in parts by weight;
the polycarboxylic acid slump loss resistant mother liquor accounts for 8-15% of the water reducer in parts by weight;
the sodium gluconate accounts for 3 to 8 percent of the water reducing agent in parts by weight;
the polycarboxylic acid water-reducing mother liquor is prepared from 300-400 parts of methyl propenyl polyoxyethylene ether macromonomer, 500-600 parts of water, 2-4 parts of hydrogen peroxide, 45-60 parts of material A and 130-160 parts of material B;
the material A comprises acrylic acid and water, wherein the acrylic acid accounts for 35-45 parts of the material A, and the water in the material A accounts for 10-20 parts of the material A;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 to 2 parts of the material B, the mercaptopropionic acid accounts for 1 to 2 parts of the material B, and the water in the material B accounts for 45 to 55 parts of the material B;
the polycarboxylic acid slump loss resistant mother liquor is prepared from 350-450 parts of methyl propenyl polyoxyethylene ether macromonomer, 350-500 parts of water, 2-4 parts of hydrogen peroxide, 90-100 parts of material A and 120-150 parts of material B;
the material A comprises 25-35 parts of acrylic acid and 65-80 parts of water;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 to 2 parts of the material B, the mercaptopropionic acid accounts for 1 to 2 parts of the material B, and the water in the material B accounts for 100 to 150 parts of the material B.
Further, adding unsaturated methyl propenyl polyoxyethylene ether macromonomer and water into a reaction kettle according to a mass ratio at 25-30 ℃, uniformly stirring, adding an oxidant hydrogen peroxide after fully dissolving, simultaneously dropwise adding a material A and a material B, wherein the material A is acrylic acid + water, the dropwise adding time is 3 hours, the material B is VC + hydroxypropionic acid + water, dropwise adding for 3.5 hours, carrying out polymerization reaction on the two, measuring the temperature once every half hour in the reaction process, ensuring the temperature of the polymerization reaction to be 25-50 ℃, keeping the temperature for 1 hour, adding water, cooling, diluting, carrying out neutralization reaction, finally checking the finished product performance of the polycarboxylic acid mother liquor, mixing the synthesized water reducing mother liquor and the slump retaining mother liquor according to a ratio, adding sodium gluconate, an air entraining agent and other components, and compounding the polycarboxylic acid water reducer for the recycled aggregate concrete through a physical process.
Further, adding alkali liquor into the reacted polymer while stirring, adjusting the pH value to 6-7, completing the reaction, and supplementing water until the solid content is about 40 percent.
Compared with the prior art, the invention has the beneficial effects that:
the polycarboxylate superplasticizer for the recycled aggregate concrete is prepared by taking three basic raw materials, namely water reducing mother liquor, slump retaining mother liquor and sodium gluconate as components, determining the optimal titration sequence and the optimal component proportion, and has the advantages of low cost and high profit margin on the basis of ensuring the performance of the recycled aggregate concrete.
The present invention will be explained in detail below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a preparation process of the present invention;
FIG. 2 is a schematic diagram of the components and the mixture ratio of the mother liquor of the polycarboxylate superplasticizer of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
The water reducing agent comprises water, polycarboxylic acid water reducing mother liquor, polycarboxylic acid slump retaining mother liquor, sodium gluconate and an air entraining agent;
the water accounts for 85 percent of the water reducing agent in parts by weight;
the polycarboxylic acid water reducing mother liquor accounts for 12% of the water reducing agent in parts by weight;
the polycarboxylic acid slump loss resistant mother liquor accounts for 8% of the water reducer in parts by weight;
the sodium gluconate accounts for 3 percent of the water reducing agent in parts by weight;
the polycarboxylic acid water-reducing mother liquor is prepared from 300 parts of methyl propenyl polyoxyethylene ether macromonomer, 500 parts of water, 2 parts of hydrogen peroxide, 45 parts of material A and 130 parts of material B;
the material A comprises acrylic acid and water, wherein the acrylic acid accounts for 35 parts of the material A, and the water in the material A accounts for 10 parts of the material A;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 part of the material B, the mercaptopropionic acid accounts for 1 part of the material B, and the water in the material B accounts for 45 parts of the material B;
the polycarboxylic acid slump loss resistant mother liquor is prepared from 350 parts of methyl propenyl polyoxyethylene ether macromonomer, 350 parts of water, 2 parts of hydrogen peroxide, 90 parts of material A and 120 parts of material B;
the material A comprises 25 parts of acrylic acid and 65 parts of water;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 part of the material B, the mercaptopropionic acid accounts for 1 part of the material B, and the water in the material B accounts for 100 parts of the material B.
At 25-30 ℃, firstly injecting 830kg of water into a reaction tank, uniformly injecting 130kg of polycarboxylic acid water-reducing mother liquor into the reaction tank within 10min, uniformly mixing the water-reducing mother liquor, then uniformly injecting 100kg of polycarboxylic acid slump-retaining mother liquor into the reaction tank within 8min, after the water-reducing polycarboxylic acid water-. And a pump is arranged at the bottom of the reaction tank, and after all reaction components are dripped, the reaction components are output after being circularly stirred in the reaction tank for 35min, so that the finished product of the polycarboxylic acid water reducing agent for recycled aggregate concrete is prepared.
And adding alkali liquor into the reacted polymer while stirring, adjusting the pH value to 6, completing the reaction, and supplementing water until the solid content is about 40 percent.
Example 2
The water reducing agent comprises water, polycarboxylic acid water reducing mother liquor, polycarboxylic acid slump retaining mother liquor, sodium gluconate and an air entraining agent;
the water accounts for 80% of the water reducing agent in parts by weight;
the polycarboxylic acid water reducing mother liquor accounts for 15% of the water reducing agent in parts by weight;
the polycarboxylic acid slump loss resistant mother liquor accounts for 10% of the water reducer in parts by weight;
the sodium gluconate accounts for 5% of the water reducing agent in parts by weight;
the polycarboxylic acid water-reducing mother liquor is prepared from 350 parts of methacrylic polyoxyethylene ether macromonomer, 550 parts of water, 2.5 parts of hydrogen peroxide, 50 parts of material A and 150 parts of material B;
the material A comprises acrylic acid and water, wherein the acrylic acid accounts for 35-45 parts of the material A, and the water in the material A accounts for 15 parts of the material A;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1.5 parts of the material B, the mercaptopropionic acid accounts for 1.3 parts of the material B, and the water in the material B accounts for 47 parts of the material B;
the polycarboxylic acid slump loss resistant mother liquor is prepared from 400 parts of methyl propenyl polyoxyethylene ether macromonomer, 400 parts of water, 2.5 parts of hydrogen peroxide, 95 parts of A material and 130 parts of B material;
the material A comprises acrylic acid and water, wherein the acrylic acid accounts for 30 parts of the material A, and the water in the material A accounts for 70 parts of the material A;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1.7 parts of the material B, the mercaptopropionic acid accounts for 1.4 parts of the material B, and the water in the material B accounts for 120 parts of the material B.
Injecting 700kg of water into a reaction tank at 25-30 ℃, uniformly injecting 90kg of polycarboxylic acid water-reducing mother liquor into the reaction tank within 15min, uniformly mixing, then uniformly injecting 120kg of polycarboxylic acid slump-retaining mother liquor into the reaction tank within 10min, after the polycarboxylic acid water-reducing mother liquor is fully reacted, arranging a feed inlet at the outer side of the reaction tank for adding other components such as small materials, refluxing a small part of liquid semi-finished product in the reaction tank through installation control of pipelines and valves, stirring and uniformly mixing 24kg of powder sodium gluconate in batches within 45min, and then injecting into the reaction tank, wherein 8kg of sodium gluconate is added in each batch. And a pump is arranged at the bottom of the reaction tank, and after all reaction components are dripped, the reaction components are output after being circularly stirred and reacted in the reaction tank for 30 min.
And adding alkali liquor into the reacted polymer while stirring, adjusting the pH value to 7, completing the reaction, and supplementing water until the solid content is about 30 percent.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, without any reference thereto being construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The polycarboxylate superplasticizer for recycled aggregate concrete is characterized by comprising water, polycarboxylate water-reducing mother liquor, polycarboxylate slump-retaining mother liquor, sodium gluconate and an air entraining agent;
the water accounts for 80-90% of the water reducing agent in parts by weight;
the polycarboxylic acid water reducing mother liquor accounts for 10-20% of the water reducing agent in parts by weight;
the polycarboxylic acid slump loss resistant mother liquor accounts for 8-15% of the water reducer in parts by weight;
the sodium gluconate accounts for 3 to 8 percent of the water reducing agent in parts by weight;
the polycarboxylic acid water-reducing mother liquor is prepared from 300-400 parts of methyl propenyl polyoxyethylene ether macromonomer, 500-600 parts of water, 2-4 parts of hydrogen peroxide, 45-60 parts of material A and 130-160 parts of material B;
the material A comprises acrylic acid and water, wherein the acrylic acid accounts for 35-45 parts of the material A, and the water in the material A accounts for 10-20 parts of the material A;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 to 2 parts of the material B, the mercaptopropionic acid accounts for 1 to 2 parts of the material B, and the water in the material B accounts for 45 to 55 parts of the material B;
the polycarboxylic acid slump loss resistant mother liquor is prepared from 350-450 parts of methyl propenyl polyoxyethylene ether macromonomer, 350-500 parts of water, 2-4 parts of hydrogen peroxide, 90-100 parts of material A and 120-150 parts of material B;
the material A comprises 25-35 parts of acrylic acid and 65-80 parts of water;
the material B comprises VC, mercaptopropionic acid and water, wherein the VC accounts for 1 to 2 parts of the material B, the mercaptopropionic acid accounts for 1 to 2 parts of the material B, and the water in the material B accounts for 100 to 150 parts of the material B.
2. The polycarboxylic acid water reducing agent for recycled aggregate concrete according to claim 1, it is characterized in that unsaturated methyl propenyl polyethenoxy ether macromonomer and water are added into a reaction kettle according to the mass ratio at the temperature of 25-30 ℃, are evenly stirred and are added with oxydol oxidant after being fully dissolved, simultaneously dripping the material A and the material B, wherein the material A is acrylic acid and water, the dripping time is 3 hours, the material B is VC, hydroxypropionic acid and water, the dripping time is 3.5 hours, the material A and the hydroxypropionic acid are subjected to polymerization reaction, the temperature is measured once every half an hour during the reaction process, the temperature of the polymerization reaction is ensured to be between 25 and 50 ℃, after the heat preservation is carried out for 1 hour, adding water, cooling, diluting, performing neutralization reaction, finally inspecting the performance of a finished product of the polycarboxylic acid mother liquor, mixing the synthesized water-reducing mother liquor and slump-retaining mother liquor in proportion, adding components such as sodium gluconate and an air entraining agent, and compounding the polycarboxylic acid water reducing agent for the recycled aggregate concrete through a physical process.
3. The polycarboxylic acid water reducing agent for recycled aggregate concrete according to claim 1, which is characterized in that the reacted polymer is stirred and added with alkali liquor, the pH value is adjusted to 6-7, the reaction is completed, and water is supplemented until the solid content is about 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005743.XA CN112645629A (en) | 2020-09-22 | 2020-09-22 | Polycarboxylate superplasticizer for recycled aggregate concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011005743.XA CN112645629A (en) | 2020-09-22 | 2020-09-22 | Polycarboxylate superplasticizer for recycled aggregate concrete |
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| Publication Number | Publication Date |
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| CN112645629A true CN112645629A (en) | 2021-04-13 |
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| CN202011005743.XA Withdrawn CN112645629A (en) | 2020-09-22 | 2020-09-22 | Polycarboxylate superplasticizer for recycled aggregate concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4101822A1 (en) * | 2021-06-08 | 2022-12-14 | Sika Technology AG | Methods to improve the workability of a mineral binder composition comprising at least one mineral binder and additionally recycled binder |
| CN116217110A (en) * | 2023-02-23 | 2023-06-06 | 湖北筑选新材料有限公司 | A modified recycled fine aggregate and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101554864B1 (en) * | 2014-11-28 | 2015-09-22 | 황정희 | A preparation method of concrete with a precipitation agent for recovered remocon water and concrete made thereby |
| CN107903360A (en) * | 2017-11-24 | 2018-04-13 | 湖北工业大学 | The gas making barrier preparation method of anti-absorbent-type polycarboxylate water-reducer |
| CN109734353A (en) * | 2019-01-28 | 2019-05-10 | 中水电第十一工程局（郑州）有限公司 | A kind of high-slump-retentionpolycarboxylate polycarboxylate water reducer |
| CN110937839A (en) * | 2019-11-04 | 2020-03-31 | 广州四极科技有限公司 | Synergist for recycled aggregate concrete and preparation method thereof |
| CN111647115A (en) * | 2020-06-15 | 2020-09-11 | 安徽海螺新材料科技有限公司 | Polycarboxylate superplasticizer mother liquor and preparation method thereof, and polycarboxylate superplasticizer and preparation method thereof |
-
2020
- 2020-09-22 CN CN202011005743.XA patent/CN112645629A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101554864B1 (en) * | 2014-11-28 | 2015-09-22 | 황정희 | A preparation method of concrete with a precipitation agent for recovered remocon water and concrete made thereby |
| CN107903360A (en) * | 2017-11-24 | 2018-04-13 | 湖北工业大学 | The gas making barrier preparation method of anti-absorbent-type polycarboxylate water-reducer |
| CN109734353A (en) * | 2019-01-28 | 2019-05-10 | 中水电第十一工程局（郑州）有限公司 | A kind of high-slump-retentionpolycarboxylate polycarboxylate water reducer |
| CN110937839A (en) * | 2019-11-04 | 2020-03-31 | 广州四极科技有限公司 | Synergist for recycled aggregate concrete and preparation method thereof |
| CN111647115A (en) * | 2020-06-15 | 2020-09-11 | 安徽海螺新材料科技有限公司 | Polycarboxylate superplasticizer mother liquor and preparation method thereof, and polycarboxylate superplasticizer and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4101822A1 (en) * | 2021-06-08 | 2022-12-14 | Sika Technology AG | Methods to improve the workability of a mineral binder composition comprising at least one mineral binder and additionally recycled binder |
| WO2022258490A1 (en) * | 2021-06-08 | 2022-12-15 | Sika Technology Ag | Methods to improve the workability of a mineral binder composition comprising at least one mineral binder and additionally recycled powder |
| CN116217110A (en) * | 2023-02-23 | 2023-06-06 | 湖北筑选新材料有限公司 | A modified recycled fine aggregate and its preparation method and application |
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Application publication date: 20210413 |