CN115677263A - Preparation method of composite dry-mixed mortar additive - Google Patents
Preparation method of composite dry-mixed mortar additive Download PDFInfo
- Publication number
- CN115677263A CN115677263A CN202211499100.4A CN202211499100A CN115677263A CN 115677263 A CN115677263 A CN 115677263A CN 202211499100 A CN202211499100 A CN 202211499100A CN 115677263 A CN115677263 A CN 115677263A
- Authority
- CN
- China
- Prior art keywords
- preparation
- mixed mortar
- dry
- mortar
- mortar additive
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a preparation method of a composite dry-mixed mortar additive, which comprises the following steps: the composite material is prepared by compounding fly ash serving as a carrier and a thickening agent, a tackifier, an air entraining agent, a retarder and an early strength agent serving as raw materials. The dry-mixed mortar additive disclosed by the invention is simple in preparation method, good in stability and small in mixing amount, and can effectively improve the water retention rate and cohesiveness of mortar, and improve the strength of the mortar and the adhesive force with a base layer, so that the phenomena of cracking and hollowing of a wall surface are prevented.
Description
Technical Field
The invention relates to the technical field of dry-mixed mortar additives, in particular to a preparation method of a composite dry-mixed mortar additive.
Background
With the acceleration of the urbanization process in China and the vigorous development of the building land industry, the requirement on the building quality is higher and higher. The construction method is influenced by various factors such as construction technology, material quality, construction habits and the like, the construction form of China is more than that of multiple floors and high floors, and the construction structure is mainly cast-in-place concrete, a frame structure and a brick-concrete structure. The characteristics of the building structure in China determine that the wall in China has large masonry quantity, poor wall surface flatness and large plastering quantity. Therefore, the amount of the mortar used in the construction site industry is very large, but many construction sites still adopt self-mixing mortar, and the mortar has various problems of hollowing, cracking and the like due to random mixing ratio. The dry powder mortar is produced industrially, raw materials and the mixing ratio are strictly controlled, the raw materials are preferably selected, the metering is accurate, the stirring is uniform, and the stable and reliable quality of the mortar can be ensured. The improvement of the building quality requirement guides the conversion of the traditional mortar to the dry powder mortar.
The dry-mixed mortar additive is an important means for improving the quality of dry-mixed mortar. The dry-mixed mortar additive is a material for adjusting the performance of mortar, and can improve the workability and the water retention rate of the mortar and increase the strength when added into the mortar. Common additives include water retention agents, pour point control agents, water reducing agents, and binders. The invention relates to a composite additive prepared based on the characteristics of the existing dry-mixed mortar, which can improve the water retention rate and cohesiveness of the mortar, and increase the strength of the mortar and the adhesive force with a base layer, thereby preventing the phenomena of wall surface cracking and hollowing.
Disclosure of Invention
The invention aims to provide a preparation method of a composite dry-mixed mortar additive.
The technical problem of the invention is mainly solved by the following technical scheme:
a composite dry-mixed mortar additive is prepared from powdered coal ash as carrier, thickening agent, tackifier, air entraining agent, retarder and early strength agent through mixing in dry-powder mixer.
Preferably, the raw materials are as follows by mass:
make up to 100% with fly ash.
Preferably, the thickener is hydroxypropyl methyl cellulose with the viscosity of 20 ten thousand, xanthan gum and polyvinyl alcohol, and the mass ratio of the hydroxypropyl methyl cellulose to the xanthan gum to the polyvinyl alcohol is 1.
Preferably, the tackifier is redispersible rubber powder, and the main component is an ethylene-vinyl acetate copolymer.
Preferably, the air entraining agent is one or a mixture of two of sodium dodecyl sulfate and alpha-sodium alkenyl sulfonate.
Preferably, the retarder is one or two of sucrose and sodium gluconate.
Preferably, the early strength agent is one or a mixture of sodium sulfate, aluminum sulfate and calcium formate.
The specific application method of the invention is as follows: the additive is added into the dry powder mortar according to the conventional method, and the mixing amount is generally 0.03-0.06% (based on the total mass of the dry powder mortar).
The invention provides a composite dry powder mortar additive, which is characterized in that: various thickening raw materials are innovatively used as the main raw materials of the thickening agent, and the thickening agent, the air entraining agent, the retarder and the early strength agent are added, and the optimal proportion is prepared to prepare the dry powder mortar additive. The detection proves that the mortar meets the requirements of JC/T2380-2016 additive for plastering mortar.
The composite dry powder mortar additive provided by the invention is low in mixing amount, generally only needs 0.03%, and is stable in performance and good in adaptability.
The invention has the beneficial effects that: the composite dry powder mortar additive provided by the invention has the advantages of high water retention rate, strong adhesive force, good cohesiveness and low consistency loss rate, and can improve the strength of mortar and the adhesive force with a base layer, thereby effectively preventing wall surface from cracking and hollowing.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments.
A composite dry-mixed mortar additive is prepared from powdered coal ash as carrier, thickening agent, viscosity increaser, air entraining agent, retarder and early strength agent through mixing in dry-powder mixer.
The raw materials comprise the following components in percentage by mass:
make up to 100% with fly ash.
Wherein: the thickener mainly plays a role in thickening and water retention, is applied to hydroxypropyl methyl cellulose with the viscosity of 20 ten thousand, xanthan gum and polyvinyl alcohol, has long water retention and thickening performances, and achieves the best effect through the combined action of the three raw materials, so that the workability of mortar is improved, and the bleeding of waterproof mortar is prevented.
The tackifier is mainly redispersible rubber powder which is an ethylene-vinyl acetate copolymer and has the functions of improving the adhesive force of the mortar and a base layer, preventing the mortar from hollowing and improving the ageing resistance.
The air entraining agent is used for controlling the volume weight of the mortar, when the volume weight of the mortar is too heavy, the mortar is easy to fall off and slide down to form hollows when the mortar is not bonded, and when the volume weight is too low, the strength is insufficient.
The retarder is mainly characterized in that the sucrose and the sodium gluconate are used for delaying cement hydration and adjusting mortar bonding time, after the mortar is mixed, construction needs a period of time, the mortar dries too fast, and the mortar is easy to crack after being painted on a wall. Or the mortar which is not yet painted is too dry, and constructors can add extra water and stir the mortar, so that the water-cement ratio is increased, and the strength of the mortar is reduced.
The early strength agent mainly aims at low construction environment temperature and slow cement hydration, and the early strength agent is required to be added to accelerate the cement hydration and improve the early strength.
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Examples 1 to 6 are composite dry mortar additives, and the raw material formulations thereof are shown in table 1.
Table 1 examples 1-6 raw material formulations
| Examples | Thickening agent | Tackifier | Air entraining agent | Retarder | Early strength agent | Fly ash |
| 1 | 40％ | 5％ | 5％ | 10％ | 30％ | 10％ |
| 2 | 0 | 5％ | 5％ | 10％ | 30％ | 50％ |
| 3 | 40％ | 0 | 5％ | 10％ | 30％ | 15％ |
| 4 | 40％ | 5％ | 0 | 10％ | 30％ | 15％ |
| 5 | 40％ | 5％ | 5％ | 0 | 30％ | 20％ |
| 6 | 40％ | 5％ | 5％ | 10％ | 0 | 40％ |
| Blank space | 0 | 0 | 0 | 0 | 0 | 100％ |
Application test example
The composite dry mortar additive prepared according to the ingredients in the table 1 is tested according to indexes in JC/T2380-2016 plastering mortar additive and GB/T25181-2016 ready-mixed mortar, and the test results are shown in the table 2.
Table 2 composite dry mortar additive performance test results
It can be seen from the examples that the addition of a thickener significantly improves the water retention of the mortar, whereas the absence of such a thickener would be below the 88% water retention required by the standard. Although the bonding strength is higher than 0.5 of the standard, the adhesion promoter can be addedGreatly improving the binding power. The volume weight standard requires that the volume weight should be more than 1800kg/m 3 In practical application, if the volume weight is too heavy, the concrete is easy to slide down, so that the probability of hollowing is high in the case of improper construction in the embodiment 4 and blank spaces. The strength of the mortar can be influenced by adding the air entraining agent, but the standard requirement can be met as long as the dosage is proper. The addition of the retarder can obviously prolong the bonding time, and the dosage of the retarder can be adjusted according to the site construction environment.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A preparation method of a composite dry-mixed mortar additive is characterized in that fly ash is used as a carrier, and a thickening agent, a tackifier, an air entraining agent, a retarder and an early strength admixture are used as raw materials and are compounded in a dry powder mixer to obtain the composite dry-mixed mortar additive.
2. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the raw materials comprise the following components in percentage by mass:
make up to 100% with fly ash.
3. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the thickener is 20 ten thousand viscosity hydroxypropyl methyl cellulose, xanthan gum and polyvinyl alcohol, and the mass ratio of the three components is 1.
4. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the tackifier is redispersible rubber powder and the main component is a copolymer of ethylene and vinyl acetate.
5. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the air entraining agent is one or two of sodium dodecyl sulfate and sodium alpha-alkenyl sulfonate.
6. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the retarder is one or two of sucrose and sodium gluconate.
7. The preparation method of the compound dry-mixed mortar additive according to claim 1, wherein the early strength agent is one or more of sodium sulfate, aluminum sulfate and calcium formate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211499100.4A CN115677263A (en) | 2022-11-28 | 2022-11-28 | Preparation method of composite dry-mixed mortar additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211499100.4A CN115677263A (en) | 2022-11-28 | 2022-11-28 | Preparation method of composite dry-mixed mortar additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115677263A true CN115677263A (en) | 2023-02-03 |
Family
ID=85056234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211499100.4A Pending CN115677263A (en) | 2022-11-28 | 2022-11-28 | Preparation method of composite dry-mixed mortar additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115677263A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK200401839A (en) * | 2004-11-25 | 2006-05-26 | 4K Beton As | Concrete and mortar additives, methods for making this and partly using it, and concrete or mortar containing this |
| WO2008091184A1 (en) * | 2007-02-22 | 2008-07-31 | Maxit Group Ab | A method for processing mortar and a mortar additive composition |
| CN107311511A (en) * | 2017-08-25 | 2017-11-03 | 河南胜泽建筑保温工程有限公司 | A kind of anti-crack building grout additive and preparation method thereof |
| CN108516753A (en) * | 2018-06-25 | 2018-09-11 | 武汉德毅环保新材料有限公司 | A kind of additives for Dry-Mixed Mortar and dry-mixed mortar and preparation method |
| CN109748555A (en) * | 2019-03-11 | 2019-05-14 | 曹爱贞 | A kind of dry-mixed mortar of suitable automatic arc spraying |
| CN112479628A (en) * | 2020-12-15 | 2021-03-12 | 广东龙湖科技股份有限公司 | Building mortar additive and plastering mortar containing same |
-
2022
- 2022-11-28 CN CN202211499100.4A patent/CN115677263A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK200401839A (en) * | 2004-11-25 | 2006-05-26 | 4K Beton As | Concrete and mortar additives, methods for making this and partly using it, and concrete or mortar containing this |
| WO2008091184A1 (en) * | 2007-02-22 | 2008-07-31 | Maxit Group Ab | A method for processing mortar and a mortar additive composition |
| CN107311511A (en) * | 2017-08-25 | 2017-11-03 | 河南胜泽建筑保温工程有限公司 | A kind of anti-crack building grout additive and preparation method thereof |
| CN108516753A (en) * | 2018-06-25 | 2018-09-11 | 武汉德毅环保新材料有限公司 | A kind of additives for Dry-Mixed Mortar and dry-mixed mortar and preparation method |
| CN109748555A (en) * | 2019-03-11 | 2019-05-14 | 曹爱贞 | A kind of dry-mixed mortar of suitable automatic arc spraying |
| CN112479628A (en) * | 2020-12-15 | 2021-03-12 | 广东龙湖科技股份有限公司 | Building mortar additive and plastering mortar containing same |
Non-Patent Citations (1)
| Title |
|---|
| 徐志芳;卢迪芬;: "用于干粉砂浆中的添加剂", 广东建材, no. 12, pages 32 - 35 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7588635B2 (en) | Hydraulic composition | |
| CN102924014B (en) | Binding mortar with light weight and high droop resistance and preparation and use methods | |
| CN103553418B (en) | A kind of premixing mortar water-retention thixotropic agent and preparation method thereof | |
| CN111606676B (en) | High-water-retention gypsum self-leveling material and preparation method thereof | |
| CN103864337A (en) | Mortar plasticizer | |
| CN102180632A (en) | Ground floor plastering gypsum | |
| CN113213866B (en) | Gypsum self-leveling material | |
| CN108609971A (en) | A kind of cement base ceramic tile adhesive and the composition for being used to prepare the adhesive | |
| CN109206108A (en) | A kind of scratch coat gypsum and preparation method thereof | |
| CN107954669A (en) | A kind of grouting material and preparation method thereof | |
| CN101234864A (en) | Building plastering mortar additive | |
| CN110590216A (en) | Permeable concrete liquid reinforcing agent and preparation method and use method thereof | |
| CN105130364A (en) | Non-cement ceramic tile adhesive | |
| CN115677263A (en) | Preparation method of composite dry-mixed mortar additive | |
| CN103771801A (en) | Dry-mixed ground mortar doped with bayer process red mud and application method thereof | |
| RU2364576C1 (en) | Complex modifying additive for construction mortar and method for production of construction mortar | |
| CN111995287A (en) | Composite additive for sprayed concrete, preparation method thereof and concrete composition | |
| CN116514446A (en) | Cement-based material water consumption sensitivity regulating agent | |
| CN111039622A (en) | Rapid-setting self-leveling mortar | |
| CN112028535A (en) | Mortar glue for building mortar | |
| CN112479628B (en) | Building mortar additive and plastering mortar containing same | |
| CN101367634B (en) | Method of preparing mortar additive, mortar additive and method for preparing mortar by employing the same | |
| CN117447169B (en) | Ceramic large plate bonding mortar and preparation method thereof | |
| CN112159161A (en) | Ground cement-based semi-self-leveling mortar and preparation method thereof | |
| CN105330198A (en) | Composition with water reduction function suitable for gypsum materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |