CN113698128B - Mortar additive, preparation method thereof and use method of mortar additive - Google Patents
Mortar additive, preparation method thereof and use method of mortar additive Download PDFInfo
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- CN113698128B CN113698128B CN202110947246.XA CN202110947246A CN113698128B CN 113698128 B CN113698128 B CN 113698128B CN 202110947246 A CN202110947246 A CN 202110947246A CN 113698128 B CN113698128 B CN 113698128B
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000654 additive Substances 0.000 title claims description 10
- 230000000996 additive effect Effects 0.000 title claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims abstract description 21
- 229930006000 Sucrose Natural products 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 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 11
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 11
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 11
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 11
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 42
- 239000002245 particle Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 14
- 229920005610 lignin Polymers 0.000 claims description 14
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 229920002401 polyacrylamide Polymers 0.000 description 5
- 230000008014 freezing Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 206010003549 asthenia Diseases 0.000 description 2
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 1
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011469 building brick Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008030 superplasticizer 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a mortar admixture, a preparation method thereof and a use method of the mortar admixture, wherein the mortar admixture comprises the following raw materials in parts by weight: 40-60 parts of sodium gluconate, 30-45 parts of white sugar, 7-12 parts of an air entraining agent, 1-3 parts of cellulose ether, 1-3 parts of a water retaining agent, 110-140 parts of a polycarboxylic acid water reducing agent and 4-6 parts of a carbon shielding agent, wherein the carbon shielding agent is sodium dodecyl benzene sulfonate. The carbon shielding agent is added to ensure that the carbon shielding agent is preferentially adsorbed by carbon pores in the fly ash, so that the air entraining agent is not easy to be continuously absorbed by the carbon pores, and the aim of improving the frost resistance of the mortar is fulfilled; the method has the advantage of further improving the frost resistance of the mortar; the application method of the mortar admixture has the advantages of simple operation and good mixing uniformity of the mortar and the mortar admixture.
Description
Technical Field
The invention relates to the technical field of mortar admixtures, in particular to a mortar admixture and a preparation method thereof as well as a use method of the mortar admixture.
Background
Mortar is a bonding substance used for building bricks on buildings, and is formed by adding water into sand and cementing materials according to a certain proportion, and is also called mortar or mortar. The mortar additive comprises components such as an air entraining agent, a water reducing agent and the like, and is an additive which is added into mortar and used for improving the performance of the mortar.
The inventor thinks that: as the mortar contains part of the fly ash and the carbon in the fly ash is easy to adsorb the air entraining agent in the mortar admixture, the air content of the mortar is reduced, and the frost resistance of the mortar is reduced.
Disclosure of Invention
The invention provides a mortar admixture, a preparation method thereof and a use method of the mortar admixture, so that carbon in fly ash is not easy to adsorb an air entraining agent, and the aim of improving the frost resistance of mortar is fulfilled.
In a first aspect, the present application provides a mortar admixture, which adopts the following technical scheme:
a mortar admixture comprises the following raw materials in parts by weight: 40-60 parts of sodium gluconate, 30-45 parts of white sugar, 7-12 parts of an air entraining agent, 1-3 parts of cellulose ether, 1-3 parts of a water retaining agent, 110-140 parts of a polycarboxylic acid water reducing agent and 4-6 parts of a carbon shielding agent, wherein the carbon shielding agent is sodium dodecyl benzene sulfonate.
By adopting the technical scheme, the carbon shielding agent is preferentially adsorbed by carbon pores in the fly ash due to the addition of the carbon shielding agent, so that the carbon pores are not easy to continuously absorb the air entraining agent, and the aim of improving the frost resistance of the mortar is fulfilled.
Optionally: the mortar admixture comprises the following raw materials in parts by weight: 50 parts of sodium gluconate, 40 parts of white sugar, 10 parts of sodium dodecyl sulfate, 2 parts of cellulose ether, 2 parts of a water-retaining agent, 120 parts of a polycarboxylic acid water reducing agent and 5 parts of a carbon shielding agent.
Optionally: the air entraining agent is sodium dodecyl sulfate.
By adopting the technical scheme, stable microbubbles are introduced into the mortar by adding the sodium dodecyl sulfate, so that the density of the wet mortar is reduced, and the constructability is better.
Optionally: the mortar admixture also comprises 7-10 parts by weight of lignin fiber.
By adopting the technical scheme, the addition of the lignin fiber improves the construction property of the mortar.
In a second aspect, the present application provides a method for preparing a mortar admixture, which adopts the following technical scheme:
a preparation method of a mortar admixture comprises the following steps: s1, adding sodium gluconate, white sugar, an air entraining agent, cellulose ether, a water retaining agent and a polycarboxylic acid water reducing agent into water, uniformly mixing to obtain a first mixture, and adding a carbon shielding agent into the water to obtain a second mixture;
s2, drying the first mixture to obtain a prefabricated object;
s3, spraying the second mixture onto the surface of the prefabricated object to obtain the mortar admixture, wherein the mass concentration of the carbon shielding agent in the second mixture is 10%.
Through adopting above-mentioned technical scheme, after the first mixture is dry, thereby the white sugar caking makes the prefabricate demonstrate the condition including the cladding of the rest components of white sugar with the mortar admixture, with the second mixture spraying to the prefabricate outside, thereby make the carbon shielding agent adhere to the white sugar outside, thereby make the staff put into the aquatic with the mortar admixture after, the carbon shielding agent preferentially gets into in the mortar, and contact with the charcoal in the fly ash, in order to shield the hole on carbon surface, and after the white sugar melts gradually, the rest components of mortar admixture are released, so that the rest components of mortar admixture get into in the mortar, thereby realize making the air entraining agent difficult by the carbon adsorption, with the purpose that improves mortar freezing resistance.
Optionally: and S2, specifically, the first mixture is subpackaged into a plurality of moulds and dried to obtain granular prefabricated objects.
By adopting the technical scheme, the granular prefabricated objects realize the purpose of uniformly mixing the mortar admixture and the mortar.
Optionally: the volume of the preform particles was 0.8cm3～1.5cm3。
By adopting the technical scheme, the volume of the prefabricated object is 0.8cm3～1.5cm3The white sugar has slow release effect on other components of the mortar admixture, and the mixing uniformity of the mortar admixture and the mortar is not easy to influence and is selectable: 7-10 parts of lignin fiber is added in the S3, and S3 is specifically that after the lignin fiber is adhered to the surface of the prefabricated object particles, the second mixture is sprayed on the surface of the prefabricated object particles.
By adopting the technical scheme, the lignin fibers are adhered to the surfaces of the prefabricated particles, so that after the mortar admixture is packaged by workers, the lignin fibers are coated on the outer sides of the mortar admixture particles, and the mortar admixture particles are not easily adhered together; on the other hand, the lignin fiber has better water absorption, so that the white sugar is not easy to absorb water and become sticky, and further the mortar admixture is not easy to stick together.
In a third aspect, the application provides a method for using a mortar admixture, which adopts the following technical scheme:
the use method of the mortar admixture comprises the following steps: a1, mixing the mortar with water to obtain a primary mixture; a2, introducing air into the primary mixture prepared in the A1; and A3, adding the mortar admixture into the preliminary mixture after the A2 treatment, and mixing to obtain the product.
By adopting the technical scheme, when the mortar admixture is used, the air is introduced into each material of the mortar mixed with water in advance by a worker, so that the mixing uniformity of each material of the mortar is improved, and the air introduced in advance increases the air quantity contacted with carbon particles in the fly ash, so that the air forms tiny bubbles on the surfaces of the carbon particles to prevent the air-entraining agent from entering pores of the carbon particles.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the carbon shielding agent is added, so that the carbon shielding agent is preferentially adsorbed by carbon pores in the fly ash, the carbon pores are difficult to continuously absorb the air entraining agent, and the aim of improving the frost resistance of the mortar is fulfilled;
2. according to the preparation method, the white sugar is coated on the outer sides of the air entraining agent and other raw materials, so that the slow release effect on the air entraining agent is achieved, the carbon shielding agent is combined with the carbon conveniently, and the purposes that the air entraining agent is not easily absorbed by carbon pores continuously and the frost resistance of the mortar is improved are further achieved;
3. the application method has the advantages of simple operation and good mixing uniformity of the mortar and the mortar admixture.
Detailed Description
The present invention will be described in further detail with reference to examples. The materials adopted in the embodiment of the application are all sold in the market, wherein the white sugar is industrial white sugar, the lauryl sodium sulfate is purchased from Henan Huashuo chemical products, Inc., the water-retaining agent is polyacrylamide, the molecular weight is 800-1200 ten thousand, and the water-retaining agent is purchased from North China Biotechnology, Inc. of Dongying; the polycarboxylate superplasticizer is purchased from Jinan Kangyue chemical technology Co., Ltd; the cellulose ether is purchased from Jining Sanshi Biotech limited, and is PHMC; lignin fiber was purchased from Gallery stroke-equalizing energy-saving technology, Inc.
Examples
Example 1
A preparation method of a mortar admixture comprises the following steps: s1, adding 40kg of sodium gluconate, 30kg of white sugar, 7kg of sodium dodecyl sulfate, 1kg of cellulose ether, 1kg of polyacrylamide and 110kg of polycarboxylic acid water reducer into water, uniformly mixing to obtain a first mixture, adding 4kg of sodium dodecyl benzene sulfonate into the water to obtain a second mixture, wherein the mass concentration of the sodium dodecyl benzene sulfonate in the second mixture is 10%;
s2, subpackaging the first mixture into a plurality of moulds, and drying to obtain granular prefabricated objects, wherein the volume of each prefabricated object is 1cm3(ii) a And S3, uniformly spraying the second mixture on the surfaces of the prefabricated particles to obtain the mortar admixture.
The use method of the mortar admixture comprises the following steps: a1, mixing the mortar with water to obtain a primary mixture; a2, introducing air into the primary mixture prepared by the A1, wherein the addition amount of the air is 0.5L/min; a3, adding the mortar admixture prepared in the embodiment into the primary mixture after the A2 treatment, and mixing to obtain the product.
In the embodiment, the mixing proportion of the mortar is designed according to the strength grade of M10: wherein the cement mixing amount is 224kg/m3The mixing amount of the fly ash is 56kg/m3The sand mixing amount is 1000kg/m3The water mixing amount is 200kg/m3The mixing amount of the air entraining agent in the mortar admixture is 0.1kg/m3Added to the preliminary mixture.
Examples 2 to 9
Examples 2-9 differ from example 1 in that: the material dosage and the prefabricated object volume are different, and the specific data are shown in the table 1.
Example 10
A preparation method of a mortar admixture comprises the following steps: s1, adding 50kg of sodium gluconate, 40kg of white sugar, 10kg of sodium dodecyl sulfate, 2kg of cellulose ether, 2kg of polyacrylamide and 120kg of polycarboxylic acid water reducer into water, uniformly mixing to obtain a first mixture, and adding 5kg of sodium dodecyl benzene sulfonate into the water to obtain a second mixture, wherein the mass concentration of the sodium dodecyl benzene sulfonate in the second mixture is 10%;
s2, subpackaging the first mixture into a plurality of moulds, and drying to obtain granular prefabricated objects, wherein the volume of each prefabricated object is 1cm3；
And S3, uniformly adhering 7kg of lignin fibers to the surfaces of the prefabricated particles, and uniformly spraying the second mixture to the surfaces of the prefabricated particles to obtain the mortar admixture.
The use method of the mortar admixture comprises the following steps: a1, mixing the mortar with water to obtain a primary mixture; a2, introducing air into the primary mixture prepared by the A1, wherein the addition amount of the air is 0.5L/min; a3, adding the mortar admixture prepared in the embodiment into the primary mixture after the A2 treatment, and mixing to obtain the product.
In the embodiment, the mixing proportion of the mortar is designed according to the strength grade of M10: wherein the cement mixing amount is 224kg/m3The mixing amount of the fly ash is 56kg/m3The sand mixing amount is 1000kg/m3The water mixing amount is 200kg/m3The mixing amount of the air entraining agent in the mortar admixture is 0.1kg/m3Added to the preliminary mixture.
Example 11
The present embodiment differs from embodiment 10 in that: the amount of lignin fibers was 9 kg.
Example 12
The present embodiment differs from embodiment 10 in that: the amount of lignin fibers was 10 kg.
Example 13
This example differs from example 1 in that: the preparation method of the mortar admixture comprises the following steps: s1, uniformly mixing 40kg of sodium gluconate, 30kg of white sugar, 7kg of sodium dodecyl sulfate, 1kg of cellulose ether, 1kg of polyacrylamide, 110kg of polycarboxylic acid water reducing agent and 4kg of dodecylbenzene sulfonic acid to obtain the mortar admixture.
Comparative example
Comparative example 1
A preparation method of a mortar admixture comprises the following steps: s1, adding 40kg of sodium gluconate, 30kg of white sugar, 7kg of sodium dodecyl sulfate, 1kg of cellulose ether, 1kg of polyacrylamide and 110kg of polycarboxylic acid water reducing agent into water, and uniformly mixing to obtain a first mixture;
s2, subpackaging the first mixture into a plurality of moulds, and drying to obtain a prefabricated object, wherein the volume of the prefabricated object is 1cm3And obtaining the mortar admixture.
The use method of the mortar admixture comprises the following steps: a1, mixing the mortar with water to obtain a primary mixture; a2, introducing air into the preliminary mixture prepared by the A1, wherein the adding amount of the air is 0.5L/min; a3, adding the mortar admixture prepared in the embodiment into the primary mixture after the A2 treatment, and mixing to obtain the product.
In the embodiment, the mixing proportion of the mortar is designed according to the strength grade of M10: wherein the cement mixing amount is 224kg/m3The mixing amount of the fly ash is 56kg/m3The sand mixing amount is 1000kg/m3The water mixing amount is 200kg/m3The mixing amount of the air entraining agent is 0.1kg/m3。
Performance test
Detection method
Examples 1-13 and comparative example 1 were tested for cubic compressive strength and freeze resistance after 15 cycles of freeze-thaw according to JGJ/70-2009, with the specific test results shown in Table 2.
Combining example 1 and comparative example 1 with table 2, it can be seen that the addition of sodium dodecylbenzenesulfonate, i.e., a carbon shielding agent, in example 1 effectively reduces the strength loss of the mortar test piece after freezing, as compared to comparative example 1, which may be due to: after being added, the sodium dodecyl benzene sulfonate is preferentially combined with pores of carbon in the fly ash, so that the carbon is not easy to adsorb an air entraining agent, and the aim of improving the frost resistance of a mortar test piece is fulfilled;
as can be seen by combining examples 5 to 9 with Table 2, when the volume of the preform is too large or too small, the mortar specimens each have a strength loss after freezing of 0.8 to 1.5cm as compared with the volume of the preform3The range is large.
By combining the example 4 and the example 10 and combining the table 2, it can be seen that, compared with the example 4, the addition of the lignin fiber in the example 10 improves the cubic compressive strength of the mortar test piece, and effectively reduces the strength loss of the mortar test piece after freezing.
By combining example 1 with example 13 and table 2, it can be seen that example 1, using the method of the present application, is effective in the loss of the post-freezing strength of the mortar test specimens, as compared to the direct mixing of the mortar admixture of example 13 with each of the materials, probably due to: according to the method, the white sugar is coated on the outer sides of other raw materials, so that the release of the air entraining agent is delayed, and the carbon shielding agent can be further combined with more carbon pores in the fly ash, so that the aim of improving the frost resistance of the test piece is further fulfilled.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (4)
1. The preparation method of the additive of the mortar containing the fly ash is characterized by comprising the following steps: the method comprises the following steps: s1, adding sodium gluconate, white sugar, an air entraining agent, cellulose ether, a water retaining agent and a polycarboxylic acid water reducing agent into water, uniformly mixing to obtain a first mixture, and adding a carbon shielding agent into the water to obtain a second mixture;
s2, drying the first mixture to obtain a prefabricated object;
s3, spraying the second mixture onto the surface of the prefabricated object to obtain the mortar admixture, wherein the mass concentration of the carbon shielding agent in the second mixture is 10%;
s2, the first mixture is subpackaged into a plurality of moulds and dried to obtain granular prefabricated partsThe particle volume of the preform is 0.8cm3～1.5cm3；
The mortar admixture comprises the following raw materials in parts by weight: 40-60 parts of sodium gluconate, 30-45 parts of white sugar, 7-12 parts of an air entraining agent, 1-3 parts of cellulose ether, 1-3 parts of a water retaining agent, 110-140 parts of a polycarboxylic acid water reducing agent and 4-6 parts of a carbon shielding agent, wherein the carbon shielding agent is sodium dodecyl benzene sulfonate.
2. The method for preparing the additive of the mortar containing the fly ash according to claim 1, wherein the method comprises the following steps: the air entraining agent is sodium dodecyl sulfate.
3. The method for preparing the additive of the mortar containing the fly ash according to claim 2, wherein: the mortar admixture comprises the following raw materials in parts by weight: 50 parts of sodium gluconate, 40 parts of white sugar, 10 parts of sodium dodecyl sulfate, 2 parts of cellulose ether, 2 parts of a water-retaining agent, 120 parts of a polycarboxylic acid water reducing agent and 5 parts of a carbon shielding agent.
4. The method for preparing the additive of the mortar containing the fly ash according to claim 1, wherein the method comprises the following steps: 7-10 parts by weight of lignin fiber is added into the S3, and S3 specifically comprises spraying the second mixture on the particle surface of the prefabricated object after the lignin fiber is adhered to the particle surface of the prefabricated object.
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| CN116639905B (en) * | 2023-06-27 | 2024-01-23 | 南京福盛新材料有限公司 | Additive for mortar and preparation method thereof |
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Denomination of invention: A mortar admixture and its preparation method, as well as the use method of mortar admixture Granted publication date: 20220624 Pledgee: Laiwu Shandong rural commercial bank Limited by Share Ltd. Pledgor: Shandong Baina Concrete Co.,Ltd. Registration number: Y2024980020459 |