CN111943557A - Composite dry-mixed mortar additive and preparation method thereof - Google Patents
Composite dry-mixed mortar additive and preparation method thereof Download PDFInfo
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- CN111943557A CN111943557A CN202010674840.1A CN202010674840A CN111943557A CN 111943557 A CN111943557 A CN 111943557A CN 202010674840 A CN202010674840 A CN 202010674840A CN 111943557 A CN111943557 A CN 111943557A
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- mixed mortar
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Classifications
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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
- 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
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/383—Whiskers
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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
- C04B22/16—Acids or salts thereof containing phosphorus in the anion, e.g. phosphates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/003—Phosphorus-containing compounds
Abstract
The invention relates to a composite dry-mixed mortar admixture which comprises the following components in parts by weight: 100 parts of flocculant, 220 parts of redispersible latex powder 180, 13-15 parts of whisker, 45-55 parts of water reducing agent, 1-2 parts of air entraining agent, 10-15 parts of sodium hexametaphosphate, 8-10 parts of hydroxyethylidene diphosphonic acid and 122 parts of carrier 117; also relates to a preparation method of the composite dry-mixed mortar additive. The whiskers in the composite dry-mixed mortar admixture are beneficial to improving the sag resistance of the dry-mixed mortar admixture and improving the tensile bonding strength of the plastering mortar after hardening; the hydroxyethylidene diphosphonic acid has the functions of thickening, water retention and the like, and can effectively avoid the phenomena of layering and bleeding of dry-mixed mortar mixtures; the sodium hexametaphosphate has better compatibility with a dry-mixed mortar cement system, and can effectively prolong the setting time of a mortar mixture.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a composite dry-mixed mortar additive and a preparation method thereof.
Background
The ready-mixed mortar is a novel building material developed along with the scientific and technological progress and the civilized construction requirement of the building industry in recent years, has the advantages of high product quality, complete varieties, high production efficiency, convenient use, little environmental pollution, convenient civilized construction and the like, and accords with the development direction of the modernization of the building industry greatly promoted in China at present. The popularization and the use of the ready-mixed mortar are favorable for promoting the use of bulk cement, can greatly utilize industrial byproducts such as fly ash, slag and the like, and is an important technical means for ensuring the quality of construction engineering, improving the modernization level of building construction, realizing the comprehensive utilization of resources and promoting civilized construction.
The ready-mixed mortar can be divided into wet-mixed mortar and dry-mixed mortar, and compared with the wet-mixed mortar, the dry-mixed mortar can be used at any time after being mixed, so that the use is more flexible and convenient, and the ready-mixed mortar is widely popularized in some areas of China. However, in popularization and application, the mortar mixture often has the conditions of bleeding, too short setting time, insufficient compressive strength and the like.
Disclosure of Invention
The invention aims to provide a composite dry-mixed mortar admixture, which can solve the problems of bleeding, too short setting time and insufficient compressive strength of a dry-mixed mortar admixture after the conventional dry-mixed mortar admixture is added.
Therefore, the technical scheme adopted by the invention is that the composite dry-mixed mortar admixture comprises the following components in parts by weight: 100 parts of flocculant, 220 parts of redispersible latex powder 180, 13-15 parts of whisker, 45-55 parts of water reducing agent, 1-2 parts of air entraining agent, 10-15 parts of sodium hexametaphosphate, 8-10 parts of hydroxyethylidene diphosphonic acid and 122 parts of carrier 117.
Preferably: the flocculant is polyoxyethylene or polyacrylamide. Polyethylene oxide or polyacrylamide is easily dissolved, and contributes to improving the early workability of the dry-mixed mortar mixture.
Preferably: the water reducing agent is lignosulfonate.
Preferably: the air entraining agent is sodium dodecyl sulfate, sodium dodecyl benzene sulfonate or triterpenoid saponin.
Preferably: the carrier is limestone powder, silica powder or zeolite powder. Limestone powder, silica powder or zeolite powder is used as a carrier of each functional component of the composite dry-mixed mortar admixture, and each functional component can be effectively dispersed under the condition of full stirring and mixing, so that the uniformity and stability of the composite dry-mixed mortar admixture are improved, and the composite dry-mixed mortar admixture is beneficial to drying and storage.
Meanwhile, the invention also provides a preparation method of the composite dry-mixed mortar admixture, which comprises the following steps:
s1: respectively weighing the crystal whiskers and the carrier, and putting the crystal whiskers and the carrier into a stirrer to be stirred until the crystal whiskers and the carrier are uniformly mixed;
s2: respectively weighing the flocculating agent, the redispersible latex powder, the air entraining agent, the sodium hexametaphosphate and the hydroxyethylidene diphosphonic acid, and putting the materials into a stirrer in sequence to be stirred with the existing mixture until the materials are uniformly mixed;
s3: weighing the water reducing agent, putting the water reducing agent into a stirrer, and stirring the mixture and the existing mixture until the mixture is uniformly mixed to obtain the composite dry-mixed mortar additive.
Preferably: the mixers in the step S1, the step S2 and the step S3 adopt a gravity-free mixer.
The invention has the beneficial effects that:
(1) the whiskers are beneficial to improving the anti-sagging property of the dry-mixed mortar mixture, reducing the material loss, improving the labor efficiency and improving the tensile bonding strength of the hardened plastering mortar;
(2) the hydroxyethylidene diphosphonic acid has the functions of thickening, water retention and the like, can effectively avoid the phenomena of layering and bleeding of the dry-mixed mortar mixture, can also improve the later workability of the dry-mixed mortar mixture, and can prolong the operable time of the mortar mixture;
(3) the sodium hexametaphosphate has better compatibility with a dry-mixed mortar cement system, and can effectively prolong the setting time of the mortar mixture so as to accurately control the operable time of the mortar mixture.
Detailed Description
The present invention is further illustrated by the following examples.
Example 1
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 180 parts of redispersible latex powder, 13 parts of whisker, 45 parts of lignosulfonate, 1 part of sodium dodecyl sulfate, 10 parts of sodium hexametaphosphate, 8 parts of hydroxyethylidene diphosphonic acid and 117 parts of limestone powder, and the components are prepared according to the following steps:
step 1, respectively weighing 13 parts of whiskers and 117 parts of limestone powder, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 180 parts of redispersible latex powder, 1 part of sodium dodecyl sulfate, 10 parts of sodium hexametaphosphate and 8 parts of hydroxyethylidene diphosphonic acid, and sequentially putting the weighed materials into a gravity-free mixer to be stirred with the existing mixture until the materials are uniformly mixed;
and 3, weighing 45 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 2
A composite dry-mixed mortar additive and a preparation method thereof are disclosed, which comprises the following components in parts by weight: 100 parts of polyoxyethylene, 220 parts of redispersible latex powder, 15 parts of whisker, 55 parts of lignosulfonate, 2 parts of sodium dodecyl sulfate, 15 parts of sodium hexametaphosphate, 10 parts of hydroxyethylidene diphosphonic acid and 122 parts of limestone powder, and the components are prepared according to the following steps:
step 1, weighing 15 parts of whiskers and 122 parts of limestone powder respectively, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 220 parts of redispersible latex powder, 2 parts of sodium dodecyl sulfate, 15 parts of sodium hexametaphosphate and 10 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 55 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 3
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of limestone powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of limestone powder, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 4
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyacrylamide, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of limestone powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of limestone powder, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyacrylamide, 200 parts of redispersible latex powder, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 5
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of sodium dodecyl benzene sulfonate, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of limestone powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of limestone powder, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 2 parts of sodium dodecyl benzene sulfonate, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, and sequentially putting the weighed materials into a gravity-free mixer to be stirred with the existing mixture until the materials are uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 6
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of triterpenoid saponin, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of limestone powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of limestone powder, and putting the whiskers and the limestone powder into a gravity-free mixer to stir until the whiskers and the limestone powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 2 parts of triterpenoid saponin, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 7
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of silicon powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of silicon powder, and putting into a gravity-free mixer to stir until the whiskers and the silicon powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
Example 8
A composite dry-mixed mortar admixture is composed of the following components in parts by weight: 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 14 parts of whisker, 50 parts of lignosulfonate, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate, 9 parts of hydroxyethylidene diphosphonic acid and 120 parts of zeolite powder, and the components are prepared according to the following steps:
step 1, respectively weighing 14 parts of whiskers and 120 parts of zeolite powder, and putting into a gravity-free mixer to stir until the whiskers and the zeolite powder are uniformly mixed;
step 2, respectively weighing 100 parts of polyoxyethylene, 200 parts of redispersible latex powder, 2 parts of sodium dodecyl sulfate, 13 parts of sodium hexametaphosphate and 9 parts of hydroxyethylidene diphosphonic acid, sequentially putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed;
and 3, weighing 50 parts of lignosulfonate, putting into a gravity-free mixer, and stirring with the existing mixture until the mixture is uniformly mixed.
The composite dry-mixed mortar admixture prepared in the above examples 1 to 8 was blended into cement mortar according to the national current standard JG/T426-2013 plastering mortar plasticizer to prepare dry-mixed plastering mortar, and the performance test was carried out, and the obtained results are shown in Table 1.
TABLE 1
The composite dry-mixed mortar admixtures obtained in examples 1 to 8 were mixed with cement, sand and water to prepare dry-mixed plastering mortar according to the national current standard JG/T164-2004 masonry mortar plasticizer, and the performance thereof was examined, and the results are shown in Table 2.
TABLE 2
The composite dry-mixed mortar admixtures obtained in examples 1 to 8 were obtained from tables 1 and 2, and the dry-mixed plastering mortar and the dry-mixed masonry mortar prepared according to JG/T426-2013 plastering mortar plasticizer and JG/T164-2004 masonry mortar plasticizer both met the standards.
Claims (7)
1. The compound dry-mixed mortar admixture is characterized by comprising the following components in parts by weight: 100 parts of flocculant, 220 parts of redispersible latex powder 180, 13-15 parts of whisker, 45-55 parts of water reducing agent, 1-2 parts of air entraining agent, 10-15 parts of sodium hexametaphosphate, 8-10 parts of hydroxyethylidene diphosphonic acid and 122 parts of carrier 117.
2. The compound dry-mixed mortar admixture according to claim 1, which is characterized in that: the flocculant is polyoxyethylene or polyacrylamide.
3. The compound dry-mixed mortar admixture according to claim 1, which is characterized in that: the water reducing agent is lignosulfonate.
4. The compound dry-mixed mortar admixture according to claim 1, which is characterized in that: the air entraining agent is sodium dodecyl sulfate, sodium dodecyl benzene sulfonate or triterpenoid saponin.
5. The compound dry-mixed mortar admixture and the preparation method thereof according to claim 1, wherein the admixture is characterized in that: the carrier is limestone powder, silica powder or zeolite powder.
6. The preparation method of the composite dry-mixed mortar admixture is characterized by comprising the following steps:
s1: respectively weighing the crystal whiskers and the carrier, and putting the crystal whiskers and the carrier into a stirrer to be stirred until the crystal whiskers and the carrier are uniformly mixed;
s2: respectively weighing the flocculating agent, the redispersible latex powder, the air entraining agent, the sodium hexametaphosphate and the hydroxyethylidene diphosphonic acid, and putting the materials into a stirrer in sequence to be stirred with the existing mixture until the materials are uniformly mixed;
s3: weighing the water reducing agent, putting the water reducing agent into a stirrer, and stirring the mixture and the existing mixture until the mixture is uniformly mixed to obtain the composite dry-mixed mortar additive.
7. The preparation method of the compound dry-mixed mortar admixture according to claim 6, which is characterized by comprising the following steps: the mixers in the step S1, the step S2 and the step S3 adopt a gravity-free mixer.
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| CN202010674840.1A CN111943557A (en) | 2020-07-14 | 2020-07-14 | Composite dry-mixed mortar additive and preparation method thereof |
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| CN202010674840.1A CN111943557A (en) | 2020-07-14 | 2020-07-14 | Composite dry-mixed mortar additive and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955968A (en) * | 2021-10-09 | 2022-01-21 | 河南漏行天下工程技术有限公司 | Underwater undispersed grouting material |
| CN115872659A (en) * | 2022-12-27 | 2023-03-31 | 沈阳泰丰特种混凝土有限公司 | Additive for prolonging opening time of ready-mixed mortar and mortar preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN107352845A (en) * | 2017-08-25 | 2017-11-17 | 河南胜泽建筑保温工程有限公司 | A kind of additive for motar |
| CN107973544A (en) * | 2017-12-11 | 2018-05-01 | 苏州弗克技术股份有限公司 | The special steady modeling agent of Machine-made Sand plastering mortar |
-
2020
- 2020-07-14 CN CN202010674840.1A patent/CN111943557A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN107352845A (en) * | 2017-08-25 | 2017-11-17 | 河南胜泽建筑保温工程有限公司 | A kind of additive for motar |
| CN107973544A (en) * | 2017-12-11 | 2018-05-01 | 苏州弗克技术股份有限公司 | The special steady modeling agent of Machine-made Sand plastering mortar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955968A (en) * | 2021-10-09 | 2022-01-21 | 河南漏行天下工程技术有限公司 | Underwater undispersed grouting material |
| CN115872659A (en) * | 2022-12-27 | 2023-03-31 | 沈阳泰丰特种混凝土有限公司 | Additive for prolonging opening time of ready-mixed mortar and mortar preparation method |
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