CN113024145A - Preparation method of concrete water reducing agent - Google Patents
Preparation method of concrete water reducing agent Download PDFInfo
- Publication number
- CN113024145A CN113024145A CN202110368453.XA CN202110368453A CN113024145A CN 113024145 A CN113024145 A CN 113024145A CN 202110368453 A CN202110368453 A CN 202110368453A CN 113024145 A CN113024145 A CN 113024145A
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- Prior art keywords
- reducing agent
- water reducing
- preparation
- box
- liquid mixing
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- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/62—Methods of preparing sulfites in general
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A preparation method of a concrete water reducing agent comprises the following steps: (a) neutralizing the sulfite waste liquid with alkaline solution; (b) after neutralization, adding microorganism to perform fermentation to remove saccharides; (c) evaporating and drying the solution to obtain the powdery water reducing agent. The preparation method of the concrete water reducing agent also relates to a preparation device of the water reducing agent, which comprises a liquid mixing box, wherein a PH value neutralizing piece is arranged on the liquid mixing box. The PH value neutralizing piece adjusts the PH value in the liquid mixing box through sliding. The PH value neutralizing piece adjusts the PH value in the liquid mixing box through vertical sliding. The water reducing agent preparation device further comprises a rubber cylinder, a pouring box and vertical holes, wherein the left side and the right side of the liquid mixing box are respectively provided with the rubber cylinder, the pouring box is connected to each rubber cylinder in a vertical sliding mode, and the pouring box is provided with two vertical holes. The water reducing agent preparation device further comprises a cylinder and a pressing screw, wherein the cylinder is arranged on the pressing screw, the cylinder is connected to the circular tube in a sliding mode, and the pressing screw is connected to the cylinder in a threaded mode.
Description
Technical Field
The invention relates to the field of water reducer preparation, and particularly relates to a preparation method of a concrete water reducer.
Background
The water reducing agent is a concrete admixture capable of reducing the water consumption for mixing under the condition of maintaining the slump constant of concrete basically. Most of them are anionic surfactants, such as lignosulfonate and naphthalene sulfonate formaldehyde polymer. After the concrete mixture is added, the dispersion effect on cement particles is achieved, the workability of the concrete mixture can be improved, the unit water consumption is reduced, and the fluidity of the concrete mixture is improved; or the unit cement consumption is reduced, and the cement is saved. The invention discloses a preparation method of a concrete water reducing agent, which is disclosed in the application number CN202011001939.1, and relates to a preparation method of a concrete water reducing agent, wherein the preparation method uses concrete water reducing agent preparation equipment, the concrete water reducing agent preparation equipment comprises a base and a screening device, and the upper surface of the base is provided with the screening device. The invention can solve the following problems in the screening treatment after the preparation and the molding of the concrete water reducing agent at present: when screening is carried out to the water-reducing agent powder after smashing to current water-reducing agent screening plant, the screening action of adoption is single, and simple reciprocating type screening only handles, and the powder is difficult to move along with screening plant to great granule like can always for the powder piles up easily and causes the mesh to block up on the screening otter board, and is thorough inadequately to the screening of water-reducing agent like this, and screening efficiency is low moreover. However, the patent cannot prepare the water reducing agent by neutralizing the sulfite waste liquid with an alkaline solution.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the preparation method of the concrete water reducing agent, and the preparation method has the beneficial effect that the sulfite waste liquid can be neutralized by an alkaline solution to prepare the water reducing agent.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a preparation method of a concrete water reducing agent comprises the following steps:
(a) neutralizing the sulfite waste liquid with alkaline solution;
(b) after neutralization, adding microorganism to perform fermentation to remove saccharides;
(c) evaporating and drying the solution to obtain the powdery water reducing agent.
The preparation method of the concrete water reducing agent also relates to a preparation device of the water reducing agent, which comprises a liquid mixing box, wherein a PH value neutralizing piece is arranged on the liquid mixing box.
The PH value neutralizing piece adjusts the PH value in the liquid mixing box through sliding.
The PH value neutralizing piece adjusts the PH value in the liquid mixing box through vertical sliding.
The water reducing agent preparation device further comprises a rubber cylinder, a pouring box and vertical holes, wherein the left side and the right side of the liquid mixing box are respectively provided with the rubber cylinder, the pouring box is connected to each rubber cylinder in a vertical sliding mode, and the pouring box is provided with two vertical holes.
The effect of bottom is kept off and is being fallen the downside of box and will fall the downside of box and seal for can save a quantitative alkaline solution in advance in falling the box, conveniently add alkaline solution in the sulfite waste liquid in the liquid mixing box like this, the pipe is used for adding the alkaline solution of storage in to falling the box, and the alkaline solution in the box of being convenient for falls adds in the liquid mixing box.
Because be provided with the screw seat on the bottom, the effect of screw seat is connecting screw, and then can be connected bottom detachably in the downside of falling the box, and the bottom of being convenient for is dismantled from the downside of falling the box.
The base strip can be vertical slip on the pipe, then drives two baffles and simultaneously vertical slip of bottom relatively, falls two vertical hole removal on the box relatively when bottom vertical slip, and then adjusts the overall size in two vertical holes, further adjusts the overall size in vertical hole through the baffle, adds alkaline solution in the sulfite waste liquid in the liquid mixing box more accurately.
Both sides all set up the spout around falling the inside of box, and the effect of two spouts is more stable when making two baffles fall the box vertical slip relatively.
When the relative pipe vertical slip of end strip, the drum also can be relative pipe vertical slip, can be fixed with the position of two baffles through the mode that the pressure screw pushed up on the pipe at this moment for two baffles can be fixed after the adjustment finishes.
The preparation method of the concrete water reducing agent has the beneficial effects that:
the invention can prepare the water reducing agent by neutralizing the sulfite waste liquid with alkaline solution.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a first schematic structural diagram of a liquid mixing box;
FIG. 2 is a second schematic structural view of the liquid mixing box;
FIG. 3 is a first schematic structural diagram of the reverse box;
FIG. 4 is a second schematic structural view of the inverted box;
FIG. 5 is a first schematic structural diagram of the bottom cover;
FIG. 6 is a second schematic structural view of the bottom cover;
FIG. 7 is a first schematic structural view of a cross bar;
FIG. 8 is a second schematic structural view of the cross bar;
FIG. 9 is a schematic structural view of the supporting frame;
FIG. 10 is a schematic view of the construction of an extended hot plate;
FIG. 11 is a schematic view of the structure of the mixing box, pouring box and horizontal bar.
In the figure: a liquid mixing box 101; a rubber cylinder 102; a gantry 103; ribs 104; a box 201 is turned over; a convex column 202; a vertical hole 203; a chute 204; a bottom cover 301; a baffle 302; a screw seat 303; a bottom strip 304; a cylinder 305; a circular tube 306; a compression screw 307; a support frame 401; a horizontal bar 501; a hollow bar 502; a square column 503; a span 504; a top mount 505; a feed pipe 506; a hand screw 507; a barrier strip 508; a flat tube 509; an extended hot plate 601; a threaded post 602; a wafer 603; an electrical heating ring 604.
Detailed Description
A preparation method of a concrete water reducing agent comprises the following steps:
(a) neutralizing the sulfite waste liquid with alkaline solution;
thus, the industrial sulfite waste liquid can be used for preparing the concrete water reducing agent, the sulfite waste liquid needs to be subjected to alkaline solution during the utilization of the industrial sulfite waste liquid, and then the neutralized sulfite waste liquid can be used for the next operation;
(b) after neutralization, adding microorganism to perform fermentation to remove saccharides;
the neutralized sulfite waste liquid needs to be subjected to microbial fermentation to remove saccharides, and then the next drying operation can be carried out after the saccharides are removed;
(c) evaporating and drying the solution to obtain the powdery water reducing agent.
After saccharides are removed from the neutralized sulfite waste liquid, the materials are dried to prepare the concrete water reducing agent, and the concrete water reducing agent can reduce the mixing water consumption under the condition of keeping the slump of concrete basically unchanged.
Referring to fig. 1-2, further,
the liquid mixing box 101 is used for adding the sulfite waste liquid into the liquid mixing box 101, and after the sulfite waste liquid is added into the liquid mixing box 101, the sulfite waste liquid in the liquid mixing box 101 can be neutralized by using a PH value neutralizing piece, so that the neutralized sulfite waste liquid is subjected to the next step of fermentation to remove sugar substances.
Referring to fig. 1-2, further,
after the sulfite waste liquid is added into the liquid mixing box 101, the sulfite waste liquid in the liquid mixing box 101 can be neutralized by using a PH value neutralizing piece, so that the neutralized sulfite waste liquid is subjected to the next step of fermentation to remove saccharides. The PH value neutralizing piece slides on the liquid mixing box 101, and the amount of alkaline solution added into the sulfite waste liquid in the liquid mixing box 101 is adjusted in a sliding mode, so that the PH value in the liquid mixing box 101 is adjusted.
Referring to fig. 1-2, further,
after the sulfite waste liquid is added into the liquid mixing box 101, the sulfite waste liquid in the liquid mixing box 101 can be neutralized by using a PH value neutralizing piece, so that the neutralized sulfite waste liquid is subjected to the next step of fermentation to remove saccharides. The PH value neutralization part slides in the vertical direction on the liquid mixing box 101, and the amount of alkaline solution added into the sulfite waste liquid in the liquid mixing box 101 is adjusted in a vertical direction sliding mode, so that the PH value in the liquid mixing box 101 is adjusted.
Referring to fig. 1-4, further,
the rubber tube 102 is used for sealing between the liquid mixing box 101 and the pouring box 201, the pouring box 201 is a PH value neutralizing part, the pouring box 201 can vertically slide on the rubber tube 102 on the liquid mixing box 101, the exposed size of the vertical hole 203 in the pouring box 201 in the liquid mixing box 101 is adjusted, the pouring box 201 is used for storing alkaline solution in sulfite waste liquid needing to be added into the liquid mixing box 101, after the exposed size of the vertical hole 203 in the pouring box 201 in the liquid mixing box 101 is adjusted to be large, the alkaline solution can be rapidly added into the sulfite waste liquid in the liquid mixing box 101, the amount and the adding speed of the alkaline solution added into the sulfite waste liquid in the liquid mixing box 101 are changed to adjust the PH value of the sulfite waste liquid in the liquid mixing box 101, and then the neutralized sulfite waste liquid can be used for next fermentation and carbohydrate removal operation.
Referring to fig. 1-6, further,
the bottom cover 301 is used for blocking the lower side of the pouring box 201 to seal the lower side of the pouring box 201, so that a certain amount of alkaline solution can be stored in the pouring box 201 in advance, the alkaline solution can be conveniently added into the sulfite waste liquid in the liquid mixing box 101, the circular tube 306 is used for adding the stored alkaline solution into the pouring box 201, and the alkaline solution in the pouring box 201 can be conveniently added into the liquid mixing box 101.
Referring to fig. 1-6, further,
since the screw seat 303 is provided on the bottom cover 301, the screw seat 303 is used as a connection screw, so that the bottom cover 301 can be detachably connected to the lower side of the inverted box 201, and the bottom cover 301 can be conveniently detached from the lower side of the inverted box 201.
Referring to fig. 1-6, further,
the bottom bar 304 can vertically slide on the circular tube 306, then drives the two baffle plates 302 to vertically slide relative to the bottom cover 301, and the bottom cover 301 vertically slides relative to the two vertical holes 203 on the inverted box 201, so as to adjust the total size of the two vertical holes 203, further adjust the total size of the vertical holes 203 through the baffle plates 302, and more accurately add alkaline solution into the sulfite waste liquid in the liquid mixing box 101.
With reference to fig. 4, further,
both sides all set up spout 204 around falling the inside box 201, and the effect of two spouts 204 is more stable when making two baffles 302 fall box 201 vertical slip relatively.
Referring to fig. 1-6, further,
when the bottom strip 304 vertically slides relative to the circular tube 306, the cylinder 305 also vertically slides relative to the circular tube 306, and at this time, the positions of the two baffle plates 302 can be fixed by pressing the screws 307 against the circular tube 306, so that the two baffle plates 302 can be fixed after adjustment is completed.
Referring to fig. 1-11, further,
the water reducing agent preparation device further comprises a support frame 401, wherein the support frame 401 is fixedly connected to the front end and the rear end of the lower portion of the liquid mixing box 101, and a round hole is formed in the lower portion of the support frame 401.
Two support frames 401 are used for supporting liquid mixing box 101, and the lower part of support frame 401 is provided with the round hole, and then can insert the screw in the round hole, can fix two support frames 401 subaerial like this to it is fixed firmly with water-reducing agent preparation facilities.
Referring to fig. 1-11, further,
the water reducing agent preparation facilities still includes sand grip 104, and equal fixedly connected with sand grip 104 on the liquid mixing box 101 of every rubber cylinder 102 left and right sides, threaded connection has the screw on the sand grip 104, and the screw is pressed on rubber cylinder 102.
Equal fixedly connected with sand grip 104 on the liquid mixing box 101 of every rubber tube 102 left and right sides, threaded connection has the screw on the sand grip 104, and then can be fixed the relative position of rubber tube 102 and liquid mixing box 101, prevent that rubber tube 102 from mixing liquid box 101 drunkenness relatively.
Referring to fig. 1-11, further,
the water reducing agent preparation device further comprises a door frame 103, a cross bar 501, hollow bars 502, a feeding pipe 506 and flat pipes 509, the upper portion of the liquid mixing box 101 is connected with the door frame 103, the cross bar 501 is connected between the upper portions of the two pouring boxes 201, the cross bar 501 is fixedly connected with the hollow bars 502, the hollow bars 502 are provided with the flat pipes 509 from left to right, the lower portion of the feeding pipe 506 is fixed at the right portion of the hollow bars 502, and the feeding pipe 506, the hollow bars 502 and the flat pipes 509 are communicated.
The feeding pipe 506 can vertically slide on the door frame 103, and then drives the horizontal bars 501, the hollow bars 502 and the plurality of flat pipes 509 on the hollow bars 502 to vertically move, the horizontal bars 501 vertically move to drive the two inverted boxes 201 to vertically move, and then the exposed size of the vertical hole 203 on the inverted box 201 in the liquid mixing box 101 is adjusted, the amount of alkaline solution added into the sulfite waste liquid in the liquid mixing box 101 and the pH value of the sulfite waste liquid in the liquid mixing box 101 are adjusted by changing the adding speed, and then the neutralized sulfite waste liquid can be used for further fermentation to remove the saccharides. Drive a plurality of flat pipes 509 and reciprocate simultaneously, and then drive a plurality of flat pipes 509 and reciprocate the solution in the stirring liquid mixing box 101 for adjust the pH value more fast. After the PH adjustment is completed, microorganisms are added to the plurality of flat tubes 509 through the feeding tube 506, and then microbial fermentation is performed to remove saccharides, and then the next drying operation can be performed after the saccharides are removed.
Referring to fig. 1-11, further,
the water reducing agent preparation facilities still includes square column 503, stride a frame 504, footstock 505, hand screw 507 and blend stop 508, the middle part fixedly connected with square column 503 of hollow strip 502, the vertical sliding connection in middle part of striding a frame 504 is on square column 503, compression spring has been cup jointed on the square column 503, compression spring is located between hollow strip 502 and the striding frame 504, the equal fixedly connected with blend stop 508 in both ends around striding frame 504, two blend stops respectively in both sides around a plurality of flat tubes 509, the upper portion fixedly connected with footstock 505 of square column 503, threaded connection has hand screw 507 on the footstock 505, hand screw 507 presses the upside at striding frame 504.
The compression spring on the square column 503 gives upward force to the spanning frame 504, so that the spanning frame 504 and the two barrier strips 508 always have upward movement tendency, then the spanning frame 504 and the two barrier strips 508 can be pressed down by rotating the hand screw 507, so that the two barrier strips 508 are not blocked at the front side and the rear side of the flat pipes 509 any more, at this time, microorganisms can be added to the flat pipes 509 through the flat pipes 509, then microbial fermentation is carried out to remove sugar substances, and then the next drying operation can be carried out after the sugar substances are removed.
Referring to fig. 1-11, further,
the water reducing agent preparation facilities still includes projection 202, extension hot plate 601, threaded column 602, disk 603 and electric heat ring 604, two equal fixedly connected with projections 202 of upside of falling box 201, all cup jointed disk 603 on every projection 202, be provided with electric heat ring 604 on the disk 603, the equal fixedly connected with threaded column 602 in both ends around every disk 603, the equal threaded connection in upper portion of a plurality of threaded column 602 has the nut, both ends are inserted respectively on the threaded column 602 on two disks 603 about extension hot plate 601, extension hot plate 601 respectively sets up one around can.
The convex column 202 on the inverted box 201 is used for connecting the wafers 603, the electric heating rings 604 on the two wafers 603 can generate heat, then the heat is transferred to the expansion hot plate 601 and the two wafers 603, and the two wafers 603 can dry the solution after the microbial treatment. The extended hotplate 601 can extend the heat at the two disks 603, so that the two disks 603 have a larger heat generating area. The nuts at threaded posts 602 can be removed when not needed, and thus expanded hot plate 601. And drying the solution from which the saccharides are removed to prepare the concrete water reducing agent.
Claims (10)
1. A preparation method of a concrete water reducing agent is characterized by comprising the following steps: the method comprises the following steps:
(a) neutralizing the sulfite waste liquid with alkaline solution;
(b) after neutralization, adding microorganism to perform fermentation to remove saccharides;
(c) evaporating and drying the solution to obtain the powdery water reducing agent.
2. The preparation method of the concrete water reducing agent according to claim 1, characterized by comprising the following steps: the preparation method of the concrete water reducing agent also relates to a preparation device of the water reducing agent, which comprises a liquid mixing box (101), wherein a PH value neutralizing piece is arranged on the liquid mixing box (101).
3. The preparation method of the concrete water reducing agent according to claim 2, characterized by comprising the following steps: the PH value neutralizing piece adjusts the PH value in the liquid mixing box (101) through sliding.
4. The preparation method of the concrete water reducing agent according to claim 2 or 3, characterized by comprising the following steps: the PH value neutralizing piece adjusts the PH value in the liquid mixing box (101) through vertical sliding.
5. The preparation method of the concrete water reducing agent according to claim 4, characterized by comprising the following steps: the water reducing agent preparation device further comprises rubber cylinders (102), a pouring box (201) and vertical holes (203), wherein the left side and the right side of the liquid mixing box (101) are respectively provided with one rubber cylinder (102), each rubber cylinder (102) is vertically connected with the pouring box (201) in a sliding mode, and the pouring box (201) is provided with two vertical holes (203).
6. The preparation method of the concrete water reducing agent according to claim 5, characterized by comprising the following steps: the water reducing agent preparation device further comprises a bottom cover (301) and a circular tube (306), the lower side of the pouring box (201) is open, the lower side of the pouring box (201) is connected with the bottom cover (301), and the circular tube (306) is arranged on the bottom cover (301).
7. The preparation method of the concrete water reducing agent according to claim 6, characterized in that: the water reducing agent preparation device further comprises a screw seat (303), the bottom cover (301) is provided with the screw seat (303), the screw seat (303) is connected with a screw in a threaded mode, and the screw is connected to the inverted box (201).
8. The preparation method of the concrete water reducing agent according to claim 7, characterized in that: the water reducing agent preparation device further comprises a baffle (302) and a bottom strip (304), the middle of the bottom strip (304) is connected to the circular tube (306) in a sliding mode, the two ends of the bottom strip (304) are connected with the baffle (302), the baffle (302) is connected to the bottom cover (301) in a sliding mode, and the two baffles (302) on the bottom strip (304) are respectively blocked on two vertical holes (203) in the two inverted boxes (201).
9. The preparation method of the concrete water reducing agent according to claim 8, characterized by comprising the following steps: the water reducing agent preparation device further comprises a sliding groove (204), the front side and the rear side of the interior of the inverted box (201) are respectively provided with the sliding groove (204), and two baffle plates (302) corresponding to the sliding grooves (204) are respectively connected to the two sliding grooves (204) in a sliding manner.
10. The preparation method of the concrete water reducing agent according to claim 9, characterized by comprising the following steps: the water reducing agent preparation device further comprises a cylinder (305) and a pressing screw (307), the cylinder (305) is arranged on the pressing screw (307), the cylinder (305) is connected to the circular tube (306) in a sliding mode, and the pressing screw (307) is connected to the cylinder (305) in a threaded mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368453.XA CN113024145A (en) | 2021-04-06 | 2021-04-06 | Preparation method of concrete water reducing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110368453.XA CN113024145A (en) | 2021-04-06 | 2021-04-06 | Preparation method of concrete water reducing agent |
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| CN113024145A true CN113024145A (en) | 2021-06-25 |
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| CN202110368453.XA Withdrawn CN113024145A (en) | 2021-04-06 | 2021-04-06 | Preparation method of concrete water reducing agent |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910988A (en) * | 2018-09-07 | 2018-11-30 | 刘湘静 | A kind of sewage treatment equipment with neutralization |
| KR101940768B1 (en) * | 2018-02-23 | 2019-04-10 | (주)한국대상안전 | Primer composition for repairing concrete |
| CN210545120U (en) * | 2019-07-22 | 2020-05-19 | 新疆玉鑫蕊科技开发有限责任公司 | Neutralization apparatus is used in water-reducing agent production |
| CN112125563A (en) * | 2020-09-24 | 2020-12-25 | 张百顺 | Production method of concrete water reducing agent |
| CN112191215A (en) * | 2020-09-30 | 2021-01-08 | 蔡柳娟 | Preparation process of high-efficiency concrete water reducing agent and concrete water reducing agent |
-
2021
- 2021-04-06 CN CN202110368453.XA patent/CN113024145A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101940768B1 (en) * | 2018-02-23 | 2019-04-10 | (주)한국대상안전 | Primer composition for repairing concrete |
| CN108910988A (en) * | 2018-09-07 | 2018-11-30 | 刘湘静 | A kind of sewage treatment equipment with neutralization |
| CN210545120U (en) * | 2019-07-22 | 2020-05-19 | 新疆玉鑫蕊科技开发有限责任公司 | Neutralization apparatus is used in water-reducing agent production |
| CN112125563A (en) * | 2020-09-24 | 2020-12-25 | 张百顺 | Production method of concrete water reducing agent |
| CN112191215A (en) * | 2020-09-30 | 2021-01-08 | 蔡柳娟 | Preparation process of high-efficiency concrete water reducing agent and concrete water reducing agent |
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Application publication date: 20210625 |