CN102731010B - Reinforced premix mortar moisture-retention thickening agent and preparation method thereof - Google Patents
Reinforced premix mortar moisture-retention thickening agent and preparation method thereof Download PDFInfo
- Publication number
- CN102731010B CN102731010B CN201210259102.6A CN201210259102A CN102731010B CN 102731010 B CN102731010 B CN 102731010B CN 201210259102 A CN201210259102 A CN 201210259102A CN 102731010 B CN102731010 B CN 102731010B
- Authority
- CN
- China
- Prior art keywords
- preparation
- premixing mortar
- water
- mortar
- flyash
- 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.)
- Active
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a reinforced premix mortar moisture-retention thickening agent and a preparation method thereof. The reinforced premix mortar moisture-retention thickening agent is prepared from montmorillonite, kaolin, halloysite, attapulgite clay, fly ash, other admixtures, surfactant and modifier. The preparation method adopts a double grinding method and comprises the following steps: carrying out drying pretreatment on the raw materials; pregrinding the surfactant and the montmorillonite; and carrying out secondary grinding on the other raw materials and the primary grinding raw materials according to parts by mass, thereby obtaining the reinforced premix mortar moisture-retention thickening agent. The invention can obviously improve the workability and water retention property of mortar, greatly lower the cement consumption and effectively enhance the cost performance of the mortar.
Description
Technical field
The present invention relates to a kind of mortar water-retaining admixture, especially relate to a kind of enhancement type premixing mortar water-retaining admixture, the invention still further relates to the preparation method of this enhancement type premixing mortar water-retaining admixture.
Background technology
Premixing mortar develops rapidly the whole nation, makes the correlation technique of premixing mortar seem more and more important.Compared with traditional mortar compounding process, one of technological core of premixing mortar is grout additive, and it has determined quality, cost and the use properties of mortar.Also can say, whether premixing mortar has the market competitiveness, and its core depends on the use of grout additive.
At present, the additive that the enterprise of the common premixing mortar of domestic production is used mainly comprises cellulose ethers, digestion lime powder class and the water-keeping thickening material take non-lime inorganic materials as carrier.Wherein, cellulose ethers result of use is better, but because its price is high, and in mortar, volume is few in addition, and measure control difficulty is large, is difficult to be uniformly dispersed in the time of mix and blend, therefore causes that premixing mortar cost is high, quality of production control difficulty is large; Digestion lime powder class admixture is substantially limited or eliminates due to its pollution to environment and difficult quality control; Water-keeping thickening material because its price is low, be easy to aborning control and more and more obtain the attention of mortar manufacturing enterprise, this material is take non-lime inorganic materials as carrier, not moisture-sensitive, in the time of batching, be easy to control, in mortar, can effectively improve serviceability and the water retention property of mortar.Domestic developed mortar water-keeping thickening material is mostly to mix with inorganic powder material preparation as compound in ether of cellulose, starch ethers, polyvinyl alcohol or redispersable latex powder conventional grout additive at present, does not form a kind of new mortar densification material.
In fact,, as common premixing mortar, its principal feature is that consumption is large, price is low, quality index is to meet water-retentivity and workability as main, therefore should be able to meet price lower for its additive, should not exceed that existing sand cutting slurry is too many, volume is unsuitable too low, should be more than 2%; In addition can improve in addition denseness and the water-retentivity of premixing mortar will get well, and can meet construction requirement, and intensity, impermeability, cohesiveness can reach standard-required.
The application Given this present invention a kind of enhancement type premixing mortar water-retaining admixture, this thickening material is admixture methyl cellulose ether, starch ethers and redispersable latex powder not, take inorganic materials as main, be exclusively used in common premixing mortar, not only can obviously improve workability and the water-retentivity of mortar, can also significantly reduce cement consumption, effectively improve the cost performance of mortar.
summary of the invention
Technical problem to be solved by this invention is enhancement type premixing mortar water-retaining admixture, not only can obviously improve workability and the water-retentivity of mortar, can also significantly reduce cement consumption, effectively improves the cost performance of mortar.
Another technical problem to be solved by this invention is to provide the preparation method of above-mentioned enhancement type premixing mortar water-retaining admixture.
The technical solution adopted for the present invention to solve the technical problems:
A preparation method for enhancement type premixing mortar water-retaining admixture, comprises the steps:
(1) polynite, kaolin, halloysite, attapulgite clay, flyash are dried to pre-treatment;
(2) tensio-active agent and polynite are ground after pre-mixing in proportion in grinding machine;
(3) kaolin, halloysite, attapulgite clay, flyash and other blended materials and properties-correcting agent after material step (2) being ground and step (1) are dried add grinding machine to carry out regrind by following mass fraction, obtain described enhancement type premixing mortar water-retaining admixture; The mass fraction of each raw material is as follows:
Polynite 20～90
Kaolin 0～30
Halloysite 0～30
Attapulgite clay 0～50
Flyash 5～30
Other blended materials 1～10
Tensio-active agent 0.1～1
Properties-correcting agent 0.2～5.
Further optimize, the mass fraction of described each raw material is:
Polynite 20～90
Kaolin 5～30
Halloysite 5～30
Attapulgite clay 5～50
Flyash 5～30
Other blended materials 1～10
Tensio-active agent 0.1～1
Properties-correcting agent 0.2～5.
Further, described tensio-active agent comprises one or more in stearic acid, sodium lignosulfonate, calcium lignin sulphonate, Sodium dodecylbenzene sulfonate, dioctyl sodium sulfosuccinate (A Luosuo-OT), Sodium glycocholate, hexadecyl brometo de amonio, octadecyl bromination ammonium.
Further other described blended materials are one or more in slag, volcanic ash, flatiron slag or flyash.
Further described properties-correcting agent comprises one or more in zinc oxide, sodium sulfate, glucose, tartrate, Whitfield's ointment.
The described grinding of further step (2) makes polynite and promoting agent can reach best mixing and react; The described regrind of step (3) meets: the water-retaining admixture making is applied in premixing mortar, and more than slurry consistency reaches 90mm, water retention reaches more than 94%.
The described milling time of further step (2) is 5min; The described regrind time of step (3) is 5min～4h.
Further described various raw materials are less than 0.5% entering the weight percent content of moisture content before grinding machine.
The present invention also provides the enhancement type premixing mortar being made by above-mentioned preparation method water-retaining admixture.
Compared with prior art, tool of the present invention has the following advantages and beneficial effect:
1. the present invention is with wilkinite, kaolin, attapulgite clay, halloysite, the inorganic powder materials such as flyash are main body, compound with tensio-active agent, utilize tensio-active agent to strengthen dispersiveness and the water-retentivity of inorganic powder, in conjunction with properties-correcting agent, can obviously improve the water retention property of premixing mortar, improve its workability, inorganic powder material after modification is simultaneously filled in the hole of mortar, can with hydrolysis product of cement generation bonding, can increase the degree of compactness of mortar slurry, improve the intensity of mortar, thereby effectively reduce the cement consumption in mortar, save premixing mortar production cost.
2. the mortar water-retaining admixture of the present invention preparation is applicable to various premixing mortar production devices, thickening material can be well with mortar in other component compatibility, can in premixing mortar, be uniformly dispersed.
3. the premixing mortar quality that product configuration of the present invention becomes complies with the national standard requirements.
4. the premixing mortar additive method that prepared by the present invention is simple.
embodiment
Below in conjunction with example, enforcement of the present invention is described further, but enforcement of the present invention and protection domain are not limited to this.
embodiment 1
Table 1 is the composition of raw materials (mass fraction) that the present invention prepares enhancement type premixing mortar water-retaining admixture.
Table 1
| ? | 1# | 2# | 3# | 4# | 5# | 6# |
| Polynite | 50 | 50 | 50 | 60 | 60 | 90 |
| Kaolin | 30 | 20 | 10 | 0 | 0 | 5 |
| Halloysite | 0 | 20 | 20 | 30 | 20 | 5 |
| Flyash | 10 | 10 | 20 | 10 | 5 | 5 |
| Slag | 10 | 0 | 0 | 0 | 5 | 5 |
| Sodium lignosulfonate | 0.5 | 1.0 | 1.0 | 1.0 | 0.5 | 0 |
| Sodium dodecylbenzene sulfonate | 0.1 | 0.1 | 0 | 0 | 0 | 0.1 |
| Sodium sulfate | 4 | 4 | 4 | 4 | 4 | 0 |
| Whitfield's ointment | 3 | 3 | 3 | 3 | 3 | 0 |
| Glucose | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
Its concrete preparation method, comprises the steps:
(1) raw material is carried out to pre-treatment, comprise polynite, kaolin, halloysite, flyash, slag are dried.
Described raw material is less than 0.5% entering the weight percent content of moisture content before grinding machine.
(2) tensio-active agent is ground after pre-mixing in proportion with covering holder soil in grinding machine, milling time is 5min.
(3) material above-mentioned raw materials and step (2) being ground adds grinding machine to carry out regrind by said ratio, and milling time is 10min.Grind and obtain described enhancement type premixing mortar water-retaining admixture.
The water-retaining admixture obtaining is added in premixing mortar, and cement is the general silicon 42.5R cement that Guangzhou stone well cement company produces, and sand is medium sand, northern rivers sand, and flyash is secondary ash.Mortar mix ratio is in Table 2(mass percent).
Table 2
| ? | Sand | Cement | Flyash | Densification powder |
| Per-cent % | 77.8 | 12.8 | 6.4 | 3 |
Prepared premixing mortar is detected by GB/T25181-2010 " premixing mortar ", and water consumption is 16% of mortar quality.Its result is as table 3.
Table 3
embodiment 2
Table 4 is composition of raw materials (mass fraction) that the present invention prepares enhancement type premixing mortar water-retaining admixture.
Table 4
| ? | 1# | 2# | 3# | 4# | 5# | 6# |
| Polynite | 80 | 80 | 80 | 80 | 80 | 80 |
| Attapulgite clay | 5 | 5 | 5 | 5 | 5 | 5 |
| Halloysite | 5 | 5 | 5 | 5 | 5 | 5 |
| Flyash | 5 | 5 | 5 | 5 | 5 | 5 |
| Slag | 5 | 5 | 5 | 5 | 5 | 5 |
| Sodium lignosulfonate | 0.1 | 0.1 | 0 | 0 | 0 | 0 |
| Sodium dodecylbenzene sulfonate | 0 | 0 | 0.1 | 0.1 | 0.1 | 0.1 |
| Sodium sulfate | 3 | 0 | 1 | 2 | 3 | 3 |
| Whitfield's ointment | 0 | 0 | 0.3 | 0.3 | 0.3 | 0.3 |
| Zinc oxide | 0 | 0 | 1 | 1 | 1 | 1 |
Its concrete preparation method, comprises the steps:
(1) raw material is carried out to pre-treatment, comprise polynite, attapulgite clay, halloysite, flyash, slag are dried.
Described raw material is less than 0.5% entering the weight percent content of moisture content before grinding machine.
(2) tensio-active agent is ground after pre-mixing in proportion with covering holder soil in grinding machine, milling time is 5min.
(3) material above-mentioned raw materials and step (2) being ground adds grinding machine to carry out regrind by said ratio, and as required, milling time is 40min.Grind and obtain described enhancement type premixing mortar water-retaining admixture.
The water-retaining admixture obtaining is added in premixing mortar, and cement is the general silicon 42.5R cement that Guangzhou stone well cement company produces, and sand is medium sand, northern rivers sand, and flyash is secondary ash.Mortar mix ratio is in Table 5(mass percent).
Table 5
| ? | Sand | Cement | Flyash | Densification powder |
| Per-cent % | 76.8 | 12.8 | 6.4 | 4 |
Prepared premixing mortar is detected by GB/T25181-2010 " premixing mortar ", and water consumption is 16% of mortar quality.Its result is as table 6.
Table 6
embodiment 3
Table 7 is composition of raw materials (mass fraction) that the present invention prepares enhancement type premixing mortar water-retaining admixture.
Table 7
| ? | 1# | 2# | 3# | 4# | 5# | 6# |
| Polynite | 80 | 80 | 80 | 50 | 50 | 50 |
| Attapulgite clay | 10 | 10 | 10 | 0 | 0 | 0 |
| Halloysite | 0 | 0 | 0 | 20 | 20 | 20 |
| Kaolin | 0 | 0 | 0 | 10 | 10 | 10 |
| Flyash | 5 | 5 | 5 | 10 | 10 | 10 |
| Slag | 5 | 5 | 5 | 10 | 10 | 10 |
| Hexadecyl brometo de amonio | 0 | 0.1 | 0.5 | 0 | 0.1 | 0.5 |
| Dioctyl sodium sulfosuccinate | 0.1 | 0 | 0.1 | 0.1 | 0.1 | 0.1 |
| Sodium sulfate | 3 | 0 | 1 | 2 | 3 | 3 |
| Whitfield's ointment | 0 | 0 | 0.3 | 0.3 | 0.3 | 0.3 |
| Tartrate | 1 | 1 | 1 | 1 | 1 | 1 |
Its concrete preparation method, comprises the steps:
(1) raw material is carried out to pre-treatment, comprise polynite, kaolin, attapulgite clay, halloysite, flyash, slag are dried.
Described raw material is less than 0.5% entering the weight percent content of moisture content before grinding machine.
(2) tensio-active agent is ground after pre-mixing in proportion with covering holder soil in grinding machine, milling time is 5min.
(3) material above-mentioned raw materials and step (2) being ground adds grinding machine to carry out regrind by said ratio, and as required, milling time is 1h.Grind and obtain described enhancement type premixing mortar water-retaining admixture.
The water-retaining admixture obtaining is added in premixing mortar, and cement is the general silicon 42.5R cement that Guangzhou stone well cement company produces, and sand is medium sand, northern rivers sand, and flyash is secondary ash.Mortar mix ratio is in Table 8(mass percent).
Table 8
| ? | Sand | Cement | Flyash | Densification powder |
| Per-cent % | 76.8 | 12.8 | 6.4 | 4 |
Prepared premixing mortar is detected by GB/T25181-2010 " premixing mortar ", and water consumption is 16% of mortar quality.Its result is as table 9.
Table 9
Claims (5)
1. a preparation method for enhancement type premixing mortar water-retaining admixture, is characterized in that comprising the steps:
(1) polynite, kaolin, halloysite, attapulgite clay, flyash are dried to pre-treatment;
(2) tensio-active agent and polynite are ground after pre-mixing in proportion in grinding machine;
(3) kaolin, halloysite, attapulgite clay, flyash and other blended materials and properties-correcting agent after material step (2) being ground and step (1) are dried add grinding machine to carry out regrind by following mass fraction, obtain described enhancement type premixing mortar water-retaining admixture; The mass fraction of each raw material is as follows:
Polynite 20～90
Kaolin 0～30
Halloysite 0～30
Attapulgite clay 0～50
Flyash 5～30
Other blended materials 1～10
Tensio-active agent 0.1～1
Properties-correcting agent 0.2～5;
Described tensio-active agent comprises one or more in Sodium dodecylbenzene sulfonate, dioctyl sodium sulfosuccinate (A Luosuo-OT), Sodium glycocholate; Described properties-correcting agent comprises one or more in zinc oxide, sodium sulfate, glucose, tartrate, Whitfield's ointment; Other described blended materials are one or more in slag, volcanic ash, flatiron slag or flyash; Described various raw material is less than 0.5% entering the weight percent content of moisture content before grinding machine.
2. the preparation method of enhancement type premixing mortar water-retaining admixture according to claim 1, is characterized in that the mass fraction of described each raw material is:
Polynite 20～90
Kaolin 5～30
Halloysite 5～30
Attapulgite clay 5～50
Flyash 5～30
Other blended materials 1～10
Tensio-active agent 0.1～1
Properties-correcting agent 0.2～5.
3. the preparation method of enhancement type premixing mortar water-retaining admixture according to claim 1 and 2, is characterized in that the described grinding of step (2) makes polynite and tensio-active agent can reach best mixing and react; The described regrind of step (3) meets: the water-retaining admixture making is applied in premixing mortar, and more than slurry consistency reaches 90mm, water retention reaches more than 94%.
4. the preparation method of enhancement type premixing mortar water-retaining admixture according to claim 1 and 2, is characterized in that the described milling time of step (2) is 5min; The described regrind time of step (3) is 5min～4h.
5. the enhancement type premixing mortar water-retaining admixture being made by preparation method claimed in claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259102.6A CN102731010B (en) | 2012-07-25 | 2012-07-25 | Reinforced premix mortar moisture-retention thickening agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259102.6A CN102731010B (en) | 2012-07-25 | 2012-07-25 | Reinforced premix mortar moisture-retention thickening agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102731010A CN102731010A (en) | 2012-10-17 |
| CN102731010B true CN102731010B (en) | 2014-06-04 |
Family
ID=46987407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210259102.6A Active CN102731010B (en) | 2012-07-25 | 2012-07-25 | Reinforced premix mortar moisture-retention thickening agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102731010B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591582B (en) * | 2014-02-23 | 2016-11-30 | 山东永远住宅工业化科技有限公司 | A kind of preparation method of the cement intensifier that can improve cement products intensity |
| CN105130367B (en) * | 2015-07-13 | 2017-10-10 | 汇彩涂料（上海）股份有限公司 | A kind of sand wall-like builds stone-like coating |
| CN105271860A (en) * | 2015-11-03 | 2016-01-27 | 浙江工业大学 | Resource utilization method of foam concrete plate residues |
| CN105985056A (en) * | 2016-01-18 | 2016-10-05 | 明光市飞洲新材料有限公司 | Nano crystal whisker water retention thickener for dry mixed mortar and preparation method of thickener |
| CN106045409A (en) * | 2016-05-25 | 2016-10-26 | 象州县科学技术局 | Method for producing prefabricated member of concrete ditch by using steel slag |
| CN106045424A (en) * | 2016-05-25 | 2016-10-26 | 象州县科学技术局 | Method for producing prefabricated member of concrete ditch by using construction waste |
| CN106045423A (en) * | 2016-05-25 | 2016-10-26 | 象州县科学技术局 | Method for producing prefabricated member of concrete ditch by using coal gangue |
| CN106220088A (en) * | 2016-07-25 | 2016-12-14 | 陈荣立 | Utilize the method that mineral hot furnace slag produces concrete gool prefabricated component |
| CN107235654A (en) * | 2017-06-27 | 2017-10-10 | 常州奕轩纺织品有限公司 | A kind of mortar water-retaining admixture and preparation method thereof |
| CN108503264B (en) * | 2018-04-16 | 2020-07-10 | 柳晶科技集团(常州)股份有限公司 | Cement thickener prepared from industrial solid wastes |
| CN108911571A (en) * | 2018-08-27 | 2018-11-30 | 四川聚力建材科技有限公司 | A kind of additional agent prescription and preparation method for Machine-blasting mortar |
| CN109180061A (en) * | 2018-09-20 | 2019-01-11 | 翟琳 | A kind of premixing mortar water-retaining admixture |
| CN109516710B (en) * | 2019-01-22 | 2022-08-23 | 上海市政工程设计研究总院（集团）有限公司 | Preparation method of ultrahigh-performance concrete rheological stabilizer |
| CN109678380B (en) * | 2019-01-22 | 2022-08-23 | 上海市政工程设计研究总院（集团）有限公司 | Ultrahigh-performance concrete rheological stabilizer |
| CN110028281A (en) * | 2019-03-07 | 2019-07-19 | 常州华光建材科技有限公司 | A kind of water proof type premixing mortar |
| CN115490475B (en) * | 2022-09-19 | 2023-09-15 | 江苏金海宁新型建材科技有限公司 | Water permeable concrete resistant to ubiquity and alkalization and preparation method thereof |
| CN117682793A (en) * | 2023-12-06 | 2024-03-12 | 淮北旭日新材料股份有限公司 | Wet-mixed mortar additive, preparation method and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092984A (en) * | 2010-12-13 | 2011-06-15 | 安吉中瑞膨润土化工有限公司 | Energy-saving environmental-protection thickener for mortar preblending and dry-mixing |
-
2012
- 2012-07-25 CN CN201210259102.6A patent/CN102731010B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092984A (en) * | 2010-12-13 | 2011-06-15 | 安吉中瑞膨润土化工有限公司 | Energy-saving environmental-protection thickener for mortar preblending and dry-mixing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102731010A (en) | 2012-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102731010B (en) | Reinforced premix mortar moisture-retention thickening agent and preparation method thereof | |
| CN103102125B (en) | Manufactured sand underwater dispersion resistant concrete and preparation method thereof | |
| CN108530001A (en) | A kind of white wall facing mortar prepared by carbide slag | |
| CN102093006B (en) | Fly ash dry-mixed mortar | |
| CN101182139A (en) | Masonry cement having higher strength and water retention | |
| CN101549984B (en) | Calcination-free desulfurized gypsum dry mixed mortar | |
| CN105777040A (en) | Novel ceramic tile adhesive and preparation method thereof | |
| CN102199024B (en) | Dry-mixed masonry mortar for industrial dust | |
| CN106220013B (en) | A kind of Desulphurization-flyash complex mineral blending material and preparation method thereof | |
| CN103435287B (en) | The reinforcement of concrete flyash composite blending material and preparation method thereof | |
| CN104844081A (en) | Concrete using granite powder as major mineral admixture | |
| CN102627426B (en) | Slag-coal ash compound solid exciter and preparation method thereof | |
| CN104556875B (en) | Use aggregate chips and the wet-mixing motar of CHARACTERISTICS OF TAILINGS SAND preparation | |
| CN104446113A (en) | High-performance polycarboxylate water reducer | |
| CN106747090A (en) | A kind of modification dolomite powder base mineral admixture and preparation method thereof | |
| CN108424030A (en) | A kind of collapse protection type Concrete strength agent and its preparation method and application | |
| CN104496327A (en) | Wet-mixed masonry mortar prepared by adopting aggregate chips | |
| CN103693924B (en) | A kind of dry-mixed plastering mortar and using method thereof being mixed with Bayer process red mud | |
| CN104496330A (en) | Wet-mixing masonry mortar prepared by adopting stone chip and tailing sand | |
| CN103396158A (en) | Antibacterial molybdenum mill tailings aerated concrete block and preparation method thereof | |
| CN101786826B (en) | Ready-mixed mortar thickening plasticity-maintaining agent | |
| CN111908825A (en) | Early strength type nano mineral admixture for concrete and preparation method thereof | |
| CN101913813A (en) | Wall plastering and building solidifying material | |
| CN103771801B (en) | A kind of be mixed with Bayer process red mud be dry mixed ground mortar and using method thereof | |
| CN106431065B (en) | A kind of flyash modified dose and its modified low-quality flyash activity admixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190611 Address after: 510160 No. 6, Tangqian Xinjie, Nanan Road, Liwan District, Guangzhou City, Guangdong Province Co-patentee after: South China University of Technology Patentee after: Guangdong Guangye Testing Co., Ltd. Co-patentee after: Guangdong Building Material Research Institute Address before: 510160 No. 6, Tangqian Xinjie, Nanan Road, Liwan District, Guangzhou City, Guangdong Province Co-patentee before: South China University of Technology Patentee before: Guangdong Building Material Research Institute |