CN114516732A - Method for preparing early strength type water reducing agent based on waste water recycling - Google Patents
Method for preparing early strength type water reducing agent based on waste water recycling Download PDFInfo
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- CN114516732A CN114516732A CN202210253377.2A CN202210253377A CN114516732A CN 114516732 A CN114516732 A CN 114516732A CN 202210253377 A CN202210253377 A CN 202210253377A CN 114516732 A CN114516732 A CN 114516732A
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- CN
- China
- Prior art keywords
- early strength
- reducing agent
- water
- water reducing
- mother liquor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 36
- 239000002351 wastewater Substances 0.000 title claims abstract description 25
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000012452 mother liquor Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000002378 acidificating effect Effects 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 8
- -1 alcohol amine Chemical class 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 13
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 11
- 235000011152 sodium sulphate Nutrition 0.000 claims description 11
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 229940047670 sodium acrylate Drugs 0.000 claims description 3
- 239000007832 Na2SO4 Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- 239000008030 superplasticizer Substances 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000008235 industrial water Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011178 precast concrete Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003809 water extraction Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241001374849 Liparis atlanticus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008032 concrete plasticizer Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 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
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/147—Alkali-metal sulfates; Ammonium sulfate
-
- 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
Abstract
The invention relates to the field of water reducer preparation and wastewater recycling, and particularly discloses a method for preparing an early strength water reducer based on wastewater recycling, which comprises the following steps: s1, firstly weighing deionized water, pouring the deionized water into a reaction kettle, and sequentially adding the deionized water into the reaction kettle according to the weight ratio of 1: 1-1: 3, continuously stirring the organic alcohol amine and the inorganic sodium salt; s2, after the polycarboxylic acid plasticizing mother liquor and a small amount of defoaming agent are completely dissolved, sequentially adding the polycarboxylic acid plasticizing mother liquor and the small amount of defoaming agent, continuously stirring, and after the polycarboxylic acid plasticizing mother liquor and the small amount of defoaming agent are uniformly stirred, obtaining the early strength water reducing agent; wherein the inorganic sodium salt is prepared by taking industrial acidic wastewater as a raw material. The invention can realize the utilization of waste water, avoid the waste of resources, prepare the water reducing agent with high water reduction, high early strength and low gas content, and has wide application prospect and marketization value.
Description
Technical Field
The invention relates to the field of water reducer preparation and wastewater recycling, in particular to a method for preparing an early-strength water reducer based on wastewater recycling.
Background
At present, the water reducing agent for precast concrete is mainly aliphatic series water reducing agent, and the water reducing agent has the advantages of low air content, low water reducing rate, fast slump loss of concrete and poor appearance quality of finished products.
In addition, in recent years, with the development of increasingly serious trends of increasingly tense resources and increasingly severe environmental crisis, wastewater treatment is not simply discharged to the maximum standard, the simple wastewater treatment is not the best way, and is replaced by a circular economy concept, and the wastewater is recycled by technical means, so that the green and sustainable development of the industry is realized, and therefore, how to realize the recycling of industrial water is an important link in the current production.
Disclosure of Invention
The invention aims to provide a method for preparing an early strength type water reducing agent based on waste water recycling, which can realize waste water recycling, can obtain a water reducing agent with high water reduction, high early strength and low gas content, has wide application prospect and marketization value, and solves the technical problem of application of a polycarboxylic acid water reducing agent in the production of prefabricated parts, pipe piles and other products.
In order to solve the technical problems, the invention provides a method for preparing an early strength water reducing agent based on wastewater recycling, which comprises the following steps:
s1, firstly weighing deionized water, pouring the deionized water into a reaction kettle, and sequentially adding the deionized water into the reaction kettle according to the weight ratio of 1: 1-1: 3, continuously stirring the organic alcohol amine and the inorganic sodium salt;
And S2, after the early strength water reducing agent is completely dissolved, sequentially adding polycarboxylic acid plasticizing mother liquor and a defoaming agent, continuously stirring, and after uniform stirring, obtaining the early strength water reducing agent.
Further, the weight ratio of the polycarboxylic acid plasticizing mother liquor to the organic alcohol amine is 3: 1.
further, the inorganic sodium salt is prepared by taking industrial acidic wastewater as a raw material, and the preparation process comprises the following steps:
s1, weighing industrial acidic wastewater and powdered aluminum sulfate in a weight ratio of 2: 1, firstly putting the industrial acidic wastewater into a reaction kettle, heating to 60-70 ℃, then adjusting the stirring speed of the reaction kettle to 300-400 r/min, then putting the powdered aluminum sulfate, stirring for 2-2.5 hours until the aluminum sulfate and sodium acrylate in the acidic wastewater fully react, wherein the reaction equation is as follows: c3H3O2Na+Al2(SO4)3-----Na2SO4↓, forming sodium sulfate precipitation;
s2, filtering and drying the sodium sulfate precipitate in the S1 to obtain the inorganic sodium salt.
Further, the organic alcohol amine is preferably triethanolamine.
The invention has the beneficial effects that:
1. the early strength water reducing agent disclosed by the invention can realize wastewater utilization, achieves recycling economy, can obtain a water reducing agent with high water reduction, high early strength and low gas content, and has wide application prospect and marketization value.
2. When the early strength type water reducing agent is used for producing precast concrete members, the early strength of concrete can be greatly improved, so that steam heating maintenance is shortened or avoided, and the technical problem of application of the polycarboxylic acid water reducing agent in production of precast members, tubular piles and other products is solved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Example 1
Weighing 70kg of water, placing the water in a reaction kettle, starting a stirrer, adding 30.00kg of 40% solid content low-acid ether ratio polycarboxylic acid superplasticizer (GJ-H (integrated type), with weight average molecular weight of 32000, self-made superplasticizer mother liquor GJ-H integrated type mother liquor) under the stirring state, then adding 0.20kg of bamboo grease defoaming agent, and continuously stirring uniformly to obtain the early strength water reducing agent, which is marked as GJ-H1.
Example 2
Weighing 50kg of water, placing the water into a reaction kettle, sequentially adding 10.00kg of triethanolamine and 10.00kg of sodium sulfate obtained by industrial water extraction under the stirring state, adding 30.00kg of 40% solid content low-acid-ether ratio polycarboxylic acid superplasticizer (GJ-H (integrated type), weight average molecular weight of 32000, self-made polycarboxylic acid mother liquor GJ-H water reduction mother liquor) after complete dissolution, adding 0.20kg of bamboo oil defoaming agent, and continuously stirring uniformly to obtain the early strength water reducer, wherein the early strength water reducer is marked as GJ-H2.
Example 3
Weighing 40kg of water, placing the water in a reaction kettle, sequentially adding 10.00kg of triethanolamine and 20.00kg of sodium sulfate obtained by industrial water extraction under the stirring state, adding 30.00kg of polycarboxylic acid superplasticizer (GJ-H (comprehensive type), weight average molecular weight of 32000 and self-made polycarboxylic acid mother liquor GJ-H water-reducing mother liquor) with 40% of solid content and low acid-ether ratio after the water is completely dissolved, then adding 0.20kg of bamboo grease defoamer, and continuously stirring uniformly to obtain the early strength water reducing agent, which is recorded as GJ-H3.
Example 4
Weighing 30kg of water, placing the water in a reaction kettle, sequentially adding 10.00kg of triethanolamine and 30.00kg of sodium sulfate obtained by industrial water extraction under the stirring state, adding 30.00kg of polycarboxylic acid superplasticizer (GJ-H (comprehensive type), weight average molecular weight of 32000, self-made polycarboxylic acid mother liquor GJ-H water-reducing mother liquor) with 40% solid content and low acid-ether ratio after the water is completely dissolved, then adding 0.20kg of bamboo grease defoamer, and continuously stirring uniformly to obtain the early strength water reducing agent, which is recorded as GJ-H4.
The results of water reducing rate, gas content and compressive strength of the early strength type water reducing agent GJ-H1 (reference) -GJ-H4 and the aliphatic water reducing agent XC-01 used for the commercial precast concrete in the above examples are detected according to GB8076-2008 concrete Water reducing agent, and are shown in Table 1.
TABLE 1
The early strength water reducing agents such as GJ-H1, GJ-H2, GJ-H3 and GJ-H4 prepared in the embodiment of the invention and the commercially available aliphatic water reducing agent XC-01 are added into concrete according to the mixing proportion of prestressed concrete (shown in a concrete mixing proportion table), the freshly mixed concrete with various types of additives added and the slump of the concrete after 30min are tested, and a test block is formed.
Concrete mixing proportion table
And (3) carrying out high-pressure steam curing on the test block along with the PHC tubular pile according to a curing mode of the prestressed concrete, wherein the test result is shown in a table 2. The cement used in the test is Nantong sea snail P.II.52.5, natural river sand with fineness modulus of 2.8 and crushed stone of 5-20mm, and the mixing ratio is as follows: c: s: g: w: j475: 666: 1117: 125: 5.
TABLE 2
To summarize: sodium acrylate in industrial acidic water can be well removed by adding sodium sulfate precipitate formed by excessive aluminum sulfate, the formed sodium sulfate can be fully used in concrete plasticizer with low water-cement ratio, low slump and high early strength requirement, the sodium sulfate obtained by neutralization can be obviously seen from the table 2, and the addition of the sodium sulfate in the plasticizer can obviously improve the 30min concrete slump retentivity and early strength of the concrete with low slump, and the slump retentivity and early strength are obviously improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. A method for preparing an early strength type water reducing agent based on wastewater recycling is characterized by comprising the following steps:
s1, firstly weighing deionized water, pouring the deionized water into a reaction kettle, and sequentially adding the deionized water in a weight ratio of 1: 1-1: 3, continuously stirring the organic alcohol amine and the inorganic sodium salt;
and S2, after the polycarboxylic acid plasticizing mother liquor and the defoaming agent are completely dissolved, sequentially adding the polycarboxylic acid plasticizing mother liquor and the defoaming agent, continuously stirring, and after the polycarboxylic acid plasticizing mother liquor and the defoaming agent are uniformly stirred, obtaining the early strength water reducing agent.
2. The method for preparing the early strength water reducing agent based on the waste water recycling according to claim 1, wherein the weight ratio of the polycarboxylic acid plasticizing mother liquor to the organic alcohol amine is 3: 1.
3. the method for preparing the early strength water reducing agent based on the wastewater reuse according to claim 1, wherein the inorganic sodium salt is prepared from industrial acidic wastewater as a raw material by the following preparation process:
s1, weighing industrial acidic wastewater and powdered aluminum sulfate in a weight ratio of 2: 1, firstly putting the industrial acidic wastewater into a reaction kettle, heating to 60-70 ℃, then adjusting the stirring speed of the reaction kettle to 300-400 r/min, then putting the powdered aluminum sulfate, stirring for 2-2.5 hours until the aluminum sulfate and sodium acrylate in the acidic wastewater fully react, wherein the reaction equation is as follows: c 3H3O2Na+Al2(SO4)3-----Na2SO4↓, forming sodium sulfate precipitation;
s2, filtering and drying the sodium sulfate precipitate in the S1 to obtain the inorganic sodium salt.
4. The method for preparing the early strength water reducing agent based on wastewater reuse according to claim 1, wherein the organic alcohol amine is triethanolamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210253377.2A CN114516732A (en) | 2022-03-15 | 2022-03-15 | Method for preparing early strength type water reducing agent based on waste water recycling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210253377.2A CN114516732A (en) | 2022-03-15 | 2022-03-15 | Method for preparing early strength type water reducing agent based on waste water recycling |
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| Publication Number | Publication Date |
|---|---|
| CN114516732A true CN114516732A (en) | 2022-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210253377.2A Pending CN114516732A (en) | 2022-03-15 | 2022-03-15 | Method for preparing early strength type water reducing agent based on waste water recycling |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564793A (en) * | 2002-10-11 | 2005-01-12 | 先进技术株式会社 | Mortar composition |
| CN102276185A (en) * | 2011-06-28 | 2011-12-14 | 上海三瑞高分子材料有限公司 | Early strength type water reducing agent for precast concrete |
| CN105130269A (en) * | 2015-08-21 | 2015-12-09 | 大连建科北方化学有限公司 | High-water-reduction high-early-strength type polycarboxylic acid water reducing agent and pyrogen-free preparation method thereof |
| JP2018002519A (en) * | 2016-06-30 | 2018-01-11 | 宇部興産株式会社 | Early-strength admixture and cement composition |
| CN107892499A (en) * | 2017-11-28 | 2018-04-10 | 湖北腾辰科技股份有限公司 | A kind of trade effluent compounding early-strength water reducer and preparation method thereof |
| CN108545762A (en) * | 2018-05-18 | 2018-09-18 | 萧县沃德化工科技有限公司 | A method of preparing concrete early strength antifreezing agent using the Waste Sulfuric Acid containing heavy metal |
| CN108751774A (en) * | 2018-04-24 | 2018-11-06 | 安徽海螺建材设计研究院有限责任公司 | A kind of preparation method of concrete prefabricated element polycarboxylate water-reducer |
-
2022
- 2022-03-15 CN CN202210253377.2A patent/CN114516732A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564793A (en) * | 2002-10-11 | 2005-01-12 | 先进技术株式会社 | Mortar composition |
| CN102276185A (en) * | 2011-06-28 | 2011-12-14 | 上海三瑞高分子材料有限公司 | Early strength type water reducing agent for precast concrete |
| CN105130269A (en) * | 2015-08-21 | 2015-12-09 | 大连建科北方化学有限公司 | High-water-reduction high-early-strength type polycarboxylic acid water reducing agent and pyrogen-free preparation method thereof |
| JP2018002519A (en) * | 2016-06-30 | 2018-01-11 | 宇部興産株式会社 | Early-strength admixture and cement composition |
| CN107892499A (en) * | 2017-11-28 | 2018-04-10 | 湖北腾辰科技股份有限公司 | A kind of trade effluent compounding early-strength water reducer and preparation method thereof |
| CN108751774A (en) * | 2018-04-24 | 2018-11-06 | 安徽海螺建材设计研究院有限责任公司 | A kind of preparation method of concrete prefabricated element polycarboxylate water-reducer |
| CN108545762A (en) * | 2018-05-18 | 2018-09-18 | 萧县沃德化工科技有限公司 | A method of preparing concrete early strength antifreezing agent using the Waste Sulfuric Acid containing heavy metal |
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Application publication date: 20220520 |
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