CN103113056B - Mortar and preparation method thereof - Google Patents
Mortar and preparation method thereof Download PDFInfo
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- CN103113056B CN103113056B CN201310052151.7A CN201310052151A CN103113056B CN 103113056 B CN103113056 B CN 103113056B CN 201310052151 A CN201310052151 A CN 201310052151A CN 103113056 B CN103113056 B CN 103113056B
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Abstract
The invention relates to the technical field of a construction material, particularly a mortar and a preparation method thereof. The mortar comprises the following components in percentage by weight: 8%-19.4% of cement, 20%-25% of natural sand, 60%-70% of tailing and waste rock, 0.03%-0.05% of cellulose ether, 0.04%-0.1% of water reducing agent, 0.01%-0.05% of rheologic assistant and 0.5%-1% of expanding agent. The invention can effectively solve the problem of self drying shrinkage of the existing mortar, lowers the water demand for mortar, and enhances the workability, thereby ensuring the close connection between the wall and the concrete component, enhancing the water resistance and impermeability of the mortar, improving the durability of the premix mortar, and reducing the conditions of cracking, hollowing and the like. Since the additives are low in price, the cost is greatly lowered as compared with the existing premix mortar with latex powder and polymer additives.
Description
technical field:
What the present invention relates to is a kind of building material technical field, specifically, relates to a kind of mortar and preparation method thereof.
background technology:
Along with the fast development of China Metallurgical Industry, the quantity discharged of mine tailing and barren rock increases year by year.China mine tailing accumulation store up more than 12,000,000,000 tons, year quantum of output reach 1,500,000,000 tons, account for more than 50% of whole world mine tailing quantum of output, and the comprehensive utilization ratio of mine tailing only has 16%.Open-cast stripping ratio is generally 3:1, and therefore annual barren rock generation is 3-5 times of mine tailing.Most mine tailing and barren rock are not yet fully utilized.The mine tailing stored up in a large number and barren rock be land occupation, waste resource not only, contaminate environment, and has serious potential safety hazard.On the other hand, China all produces various mortar at the natural sandstone of consumption more than 10,000,000,000 tons every year.And natural sand is a kind of local resources, its quality has obvious change with the difference in region, the dry-mixed mortar quality fluctuation prepared with natural sand is also very large, natural sand is a kind of storage limited resources simultaneously, along with the fast development of urbanization, the consumption of sand constantly increases, and natural sand resource faces exhaustion, and therefore development replaces natural sandstone to produce mortar with more mine tailings, barren rock and the new technology creating economic worth more and more comes into one's own.A kind of mortar adopting the mine tailing of iron tailings and barren rock to produce of the prior art, it adopts the mine tailing of cement, iron tailings and barren rock, flyash and a large amount of water to stir and forms, there is following shortcoming in described mortar: due to mine tailing and barren rock particle uneven, powder content is high, cause that mortar water requirement is large, workability is poor, shrink the problems such as large, net result is for easily causing the situations such as cracking hollowing.
summary of the invention:
The technical problem to be solved in the present invention is, provide that a kind of water requirement is less, workability better, shrink less, namely not easily cause mortar of the situations such as cracking hollowing and preparation method thereof.
For solving the problems of the technologies described above, the present invention adopts so a kind of mortar: the component comprising following weight percent, cement 8%-19.4%, natural sand 20%-25%, mine tailing and barren rock 60%-70%, ether of cellulose 0.03-0.05%, water reducer 0.04%-0.1%, auxiliary rheological agents 0.01%-0.05%, swelling agent 0.5%-1%.
As preferably, described cement to be strength grade be 42.5 cement, to ensure the strength property of this premixing mortar.
As preferably another, described natural sand is fineness modulus 2.3-2.8, and apparent density is greater than 2500 kilograms every cubic metre, the natural sand that silt content is less than 1.0%, thus mortar is stirred, to ensure the strength property of this premixing mortar.
As preferably another, described mine tailing and barren rock are fineness modulus 2.0-3.0, mine tailing and barren rock that less than 0.15 millimeter particle is less than 20%, reduce water-content needed for mortar.
As preferably another, described Mierocrystalline cellulose is the Mierocrystalline cellulose of viscosity 60,000-10 ten thousand, nontoxic, has good water-retentivity.
As preferably another, described water reducer is naphthalenesulfonate water reducer, and its water-reducing rate is 15%-20%, has very strong dissemination to cement particle.
As preferably another, described auxiliary rheological agents is OC level auxiliary rheological agents, improves the rheological of mortar.
As preferably another, described swelling agent is UEA swelling agent, reduces alkalescence, optimizes the performance of cement products, improves weather resistance, makes to have more stable swelling property, and the aquation compensating mortar is shunk, and the pore after mortar water evaporates shrinks.
For solving the problems of the technologies described above, the preparation method of a kind of like this mortar that the present invention adopts, it comprises the steps:
1), by after natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute;
2), after the natural sand fragmentation that is admitted to crusher after drying to vibratory screening apparatus, repeating step 1);
3), by after mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively;
4), be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3);
5), by ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, measuring chute is sent into;
6), cement is sent into measuring chute;
7), in measuring chute, weigh each component according to following weight percent, cement 8%-19.4%, natural sand 20%-25%, mine tailing and barren rock 60%-70%, admixture 0.5%-1.2%, the component after weighing is sent into agravic blender entirely;
8), stir after send into bin, then carry out next step packaging or be in bulkly transported to user.
Preferred as above-mentioned preparation method, the drying in described step 1, step 2, step 3 and step 4 all refers to be dried to water ratio below 0.5%, reaches best water content, reaches the standard of producing dry-mixed mortar.
The present invention is compared with mortar of the prior art, have the following advantages: the problem that effectively can solve self dry shrinkage of existing mortar, mortar water requirement reduces, improve workability, thus ensure mortar and body of wall and concrete member compact siro spinning technology, improve mortar waterproof impervious characteristic, promote the weather resistance of premixing mortar, not easily cause the situations such as cracking hollowing; Above-mentioned additive is cheap, and compared with the premixing mortar of existing interpolation latex powder, emulsion base polymer additive, cost significantly reduces.
The present invention is compared with method for preparing mortar of the prior art; have the following advantages: for premixing mortar enterprise solves the technical problem utilizing mining wastes to manufacture dry-mixed mortar; reduce costs; for the mining wastes of chronic pollution environment opens purposes; become and give up as protecting; decrease the exploitation to natural sand, benefit again resources and environment protection.
embodiment:
Below in conjunction with specific embodiment, the invention will be further described.
A kind of mortar of the present invention, comprise the component of following weight percent, cement 8%-19.4%, natural sand 20%-25%, mine tailing and barren rock 60%-70%, ether of cellulose 0.03-0.05%, water reducer 0.04%-0.1%, auxiliary rheological agents 0.01%-0.05%, swelling agent 0.5%-1%, for each raw material, in detail, described cement to be strength grade be 42.5 cement.Described cement is silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland fly ash cement or composite Portland cement, described natural sand is fineness modulus 2.3-2.8, apparent density is greater than 2500 kilograms every cubic metre, the natural sand that silt content is less than 1.0%, more particularly, described natural sand is medium sand, presses different varieties volume in manufacture dry-mixed mortar between 20 ~ 25%; Described mine tailing and barren rock are fineness modulus 2.0-3.0, mine tailing and barren rock that less than 0.15 millimeter particle is less than 20%, press different varieties, strength grade volume in manufacture dry-mixed mortar between 60 ~ 70%; Described Mierocrystalline cellulose is the Mierocrystalline cellulose of viscosity 60,000-10 ten thousand, is one or both in methyl cellulose ether and hydroxypropyl methyl cellulose ether.Described water reducer is naphthalenesulfonate water reducer, and its water-reducing rate is 15%-20%.Described auxiliary rheological agents is OC level auxiliary rheological agents.Described swelling agent is UEA swelling agent.The preparation method of a kind of mortar of the present invention, it comprises the steps: 1), by after natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute, 2), after the natural sand fragmentation that is admitted to crusher after drying to vibratory screening apparatus, repeating step 1), 3), by after mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively, 4), be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3), 5), by ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, measuring chute is sent into, 6), cement is sent into measuring chute, 7), in measuring chute, each component is weighed according to following weight percent, cement 8%-19.4%, natural sand 20%-25%, mine tailing and barren rock 60%-70%, admixture 0.5%-1.2%, in detail, when additive usage in mortar is 0.5%, such as 1000 kilograms of mortars, wherein additive usage is 5 kilograms, well-behaved in material proportion various in admixture by the method for step 5: ether of cellulose 0.21 kilogram, water reducer 0.42 kilogram, auxiliary rheological agents 0.21 kilogram, swelling agent 4.16 kilograms, by that analogy, admixture is pre-blended into total additive usage by step 5, be 0.5%-1.2% by the admixture per-cent that different varieties mortar is total, component after weighing is sent into agravic blender entirely, 8), stir after send into bin, then carry out next step packaging.Wherein, the drying in described step 1, step 2, step 3 and step 4 all refers to be dried to water ratio below 0.5%.
embodiment one
After natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute; Be admitted to after drying to vibratory screening apparatus after the natural sand fragmentation of crusher, repeating step 1); After mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively; Be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3); By ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, send into measuring chute; Cement is sent into measuring chute; In measuring chute, each component is weighed according to following weight percent, cement 18%, natural sand 21%, mine tailing and barren rock 60%, the wherein mine tailing of the mine tailing of 1.2 millimeters-4.5 millimeters and the mine tailing of barren rock 10%, 0.3 millimeter-1.2 millimeters and barren rock 40%, 0 millimeter-0.3 millimeter and barren rock 10%, admixture 1%, that is, the component after weighing is sent into agravic blender entirely; Send into bin after stirring, then carry out next step packaging, this product is dry-mixed plastering mortar, and denseness is 90-100, and amount of water is 17%-19%, and shrinking percentage is 0.12%, cohesive strength 0.38 MPa, and 28 days ultimate compression strength is 22.5 MPas.
embodiment two
After natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute; Be admitted to after drying to vibratory screening apparatus after the natural sand fragmentation of crusher, repeating step 1); After mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively; Be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3); By ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, send into measuring chute; Cement is sent into measuring chute; In measuring chute, each component is weighed according to following weight percent, cement 10%, natural sand 20%, mine tailing and barren rock 68.8%, the wherein mine tailing of the mine tailing of 1.2 millimeters to 4.5 millimeters and the mine tailing of barren rock 8.8%, 0.3 millimeter-1.2 millimeters and barren rock 45%, 0 millimeter-0.3 millimeter and barren rock 15%, admixture 1.2%, sends into agravic blender entirely by the component after weighing; Send into bin after stirring, then carry out next step packaging.This product is dry-mixed masonry mortar, and denseness is 70-80, and amount of water is 14%-16%, and shrinking percentage is 0.15%, 28 days ultimate compression strength is 7.9 MPas.
embodiment three
After natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute; Be admitted to after drying to vibratory screening apparatus after the natural sand fragmentation of crusher, repeating step 1); After mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively; Be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3); By ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, send into measuring chute; Cement is sent into measuring chute; In measuring chute, each component is weighed according to following weight percent, cement 13%, natural sand 25%, mine tailing and barren rock 61%, the wherein mine tailing of the mine tailing of 1.2 millimeters-4.5 millimeters and the mine tailing of barren rock 10%, 0.3 millimeter-1.2 millimeters and barren rock 40%, 0 millimeter-0.3 millimeter and barren rock 11%, admixture 1.0%, sends into agravic blender entirely by the component after weighing; Send into bin after stirring, then carry out next step packaging.This product is dry-mixed masonry mortar, and denseness is 70-80, and amount of water is 14%-16%, and shrinking percentage is 0.12%, 28 days ultimate compression strength is 12.9 MPas.
embodiment four
After natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute; Be admitted to after drying to vibratory screening apparatus after the natural sand fragmentation of crusher, repeating step 1); After mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively; Be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3); By ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, send into measuring chute; Cement is sent into measuring chute; In measuring chute, each component is weighed according to following weight percent, cement 15%, natural sand 24%, mine tailing and barren rock 60%, the wherein mine tailing of the mine tailing of 1.2 millimeters-4.5 millimeters and the mine tailing of barren rock 10%, 0.3 millimeter-1.2 millimeters and barren rock 40%, 0 millimeter-0.3 millimeter and barren rock 10%, admixture 1.0%, sends into agravic blender entirely by the component after weighing; Send into bin after stirring, then carry out next step packaging.This product is dry-mixed masonry mortar, and denseness is 70-80, and amount of water is 14%-16%, and shrinking percentage is 0.13%, 28 days ultimate compression strength is 17.1 MPas.
embodiment five
After natural sand drying, through vibratory screening apparatus, if natural sand particle diameter is more than or equal to the particle of 4.5mm, then send into crusher, if natural sand particle diameter is less than the particle of 4.5mm, then send into measuring chute; Be admitted to after drying to vibratory screening apparatus after the natural sand fragmentation of crusher, repeating step 1); After mine tailing and barren rock drying, through vibratory screening apparatus, if the particle diameter of mine tailing and barren rock is more than or equal to the particle of 4.5mm, then send into crusher, if mine tailing and barren rock particle diameter are less than the particle of 4.5mm, then sending into sieve apparatus, is Three Estate according to the screening of particle diameter difference, the mine tailing of to be particle diameter be respectively 1.2 millimeters-4.5 millimeters, 0.3 millimeter-1.2 millimeters and 0 millimeter-0.3 millimeter and barren rock, send into measuring chute respectively; Be admitted to after drying to vibratory screening apparatus after the mine tailing of crusher and barren rock fragmentation, repeating step 3); By ether of cellulose, water reducer, auxiliary rheological agents, swelling agent 0.05:0.1:0.05:1 pre-mixing formation admixture in mass ratio, send into measuring chute; Cement is sent into measuring chute; In measuring chute, each component is weighed according to following weight percent, cement 14%, natural sand 23%, mine tailing and barren rock 62%, the wherein mine tailing of the mine tailing of 1.2 millimeters-4.5 millimeters and the mine tailing of barren rock 12%, 0.3 millimeter-1.2 millimeters and barren rock 40%, 0 millimeter-0.3 millimeter and barren rock 10%, admixture 1%, sends into agravic blender entirely by the component after weighing; Send into bin after stirring, then carry out next step packaging.This product is dry-mixed plastering mortar, and denseness is 90-100, and amount of water is 17%-19%, and shrinking percentage is 0.1%, cohesive strength 0.25 MPa, and 28 days ultimate compression strength is 12.3 MPas.
Claims (8)
1. a mortar, is characterized in that, comprises the component of following weight percent, cement 8%-19.4%, natural sand 20%-25%, mine tailing and barren rock 60%-70%, ether of cellulose 0.03-0.05%, water reducer 0.04%-0.1%, auxiliary rheological agents 0.01%-0.05%, swelling agent 0.5%-1%.
2. a kind of mortar according to claim 1, is characterized in that, described cement to be strength grade be 42.5 cement.
3. a kind of mortar according to claim 1, is characterized in that, described natural sand is fineness modulus 2.3-2.8, and apparent density is greater than 2500 kilograms every cubic metre, the natural sand that silt content is less than 1.0%.
4. a kind of mortar according to claim 1, is characterized in that, described mine tailing and barren rock are fineness modulus 2.0-3.0, mine tailing and barren rock that less than 0.15 millimeter particle is less than 20%.
5. a kind of mortar according to claim 1, is characterized in that, described ether of cellulose is the ether of cellulose of viscosity 60,000-10 ten thousand.
6. a kind of mortar according to claim 1, is characterized in that, described water reducer is naphthalenesulfonate water reducer, and its water-reducing rate is 15%-20%.
7. a kind of mortar according to claim 1, is characterized in that, described auxiliary rheological agents is OC level auxiliary rheological agents.
8. a kind of mortar according to claim 1, is characterized in that, described swelling agent is UEA swelling agent.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319119A (en) * | 2013-06-05 | 2013-09-25 | 绍兴益生砂浆有限公司 | Novel dry-mixed ground mortar |
| CN103319120A (en) * | 2013-06-05 | 2013-09-25 | 绍兴益生砂浆有限公司 | Machine-made dry-mixed plaster mortar suitable for mechanized spraying |
| CN104529341A (en) * | 2014-11-26 | 2015-04-22 | 芜湖中民科技建材有限公司 | Dry-mixed masonry mortar, and preparation method and application thereof |
| CN104529265A (en) * | 2014-11-26 | 2015-04-22 | 芜湖中民科技建材有限公司 | Dry-mixed wear-resistant mortar, and preparation method and application thereof |
| CN104926215A (en) * | 2015-06-02 | 2015-09-23 | 马鞍山南山开发公司 | Method for producing premixed dry-mixed mortar from iron tailings |
| CN105294011A (en) * | 2015-11-21 | 2016-02-03 | 诸暨市兆山天峰干混砂浆有限公司 | Dry mixed ground mortar for effectively solving dusting and peeling of ground and preparation method for dry mixed ground mortar |
| CN105601198A (en) * | 2015-12-21 | 2016-05-25 | 鞍山三冶建筑工程有限公司 | Dry-mixed mortar for staple shaft masonry and preparation method thereof |
| CN106116332A (en) * | 2016-06-21 | 2016-11-16 | 浙江共创建材科技有限公司 | A kind of motar utilizing garbage to produce |
| CN113061001A (en) * | 2021-05-20 | 2021-07-02 | 四川善盛宏林科技有限公司 | Masonry mortar production process |
| CN114292058B (en) * | 2021-12-06 | 2022-11-25 | 华润水泥技术研发有限公司 | Tungsten tailing sand exterior wall putty and preparation method thereof |
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| CN101560083A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Dry powder mortar of mine tailings |
| CN101857397A (en) * | 2009-04-10 | 2010-10-13 | 同济大学 | Method for preparing dry-mixed mortar from construction waste fine aggregate |
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| CN101857397A (en) * | 2009-04-10 | 2010-10-13 | 同济大学 | Method for preparing dry-mixed mortar from construction waste fine aggregate |
| CN101560083A (en) * | 2009-06-02 | 2009-10-21 | 河北科技大学 | Dry powder mortar of mine tailings |
| CN102503309A (en) * | 2011-11-07 | 2012-06-20 | 西南交通大学 | Self-compacting concrete mixture for plate-type ballastless track of railway |
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Address after: Jiaxing City, Zhejiang Province, Tongxiang City, 314511 North Gate Chongfu three West Ramp Bridge Applicant after: Tongxiang Zhengchang New Material Co., Ltd. Address before: Jiaxing City, Zhejiang province 314511 North Gate Chongfu three West Ramp Bridge Applicant before: Tongxiang Zhengchang New Material Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Jiaxing City, Zhejiang Province, Tongxiang City, 314511 North Gate Chongfu three West Ramp Bridge Patentee after: Zhejiang Zhengchang New Material Co., Ltd Address before: Jiaxing City, Zhejiang Province, Tongxiang City, 314511 North Gate Chongfu three West Ramp Bridge Patentee before: TONGXIANG ZHENGCHANG NEW MATERIAL Co.,Ltd. |