CN106747081A - Cementitious capillary waterproofing material - Google Patents

Cementitious capillary waterproofing material Download PDF

Info

Publication number
CN106747081A
CN106747081A CN201611125889.1A CN201611125889A CN106747081A CN 106747081 A CN106747081 A CN 106747081A CN 201611125889 A CN201611125889 A CN 201611125889A CN 106747081 A CN106747081 A CN 106747081A
Authority
CN
China
Prior art keywords
parts
zeolite
complex catalyst
cement
cementitious capillary
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.)
Granted
Application number
CN201611125889.1A
Other languages
Chinese (zh)
Other versions
CN106747081B (en
Inventor
胡景波
陈土兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JINHUA XINSHENG ZEOLITE DEVELOPMENT Co Ltd
Original Assignee
JINHUA XINSHENG ZEOLITE DEVELOPMENT Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JINHUA XINSHENG ZEOLITE DEVELOPMENT Co Ltd filed Critical JINHUA XINSHENG ZEOLITE DEVELOPMENT Co Ltd
Priority to CN201611125889.1A priority Critical patent/CN106747081B/en
Publication of CN106747081A publication Critical patent/CN106747081A/en
Application granted granted Critical
Publication of CN106747081B publication Critical patent/CN106747081B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use 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
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/047Zeolites
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/10Coating or impregnating
    • C04B20/1051Organo-metallic compounds; Organo-silicon compounds, e.g. bentone
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/60Agents for protection against chemical, physical or biological attack
    • C04B2103/65Water proofers or repellants
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/27Water resistance, i.e. waterproof or water-repellent materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

A kind of cementitious capillary waterproofing material, belongs to building material technical field.It is characterized in that:The waterproof material is mixed by the component of following weight proportion:56~62 parts of cement, 27 parts~33 parts of quartz sand, 7~11 parts of complex catalyst, 1~3 part of zeolite waterproofing agent;Described complex catalyst mixed and modified is formed by the component of following weight proportion:87~75 parts of zeolite powder, 5~10 parts of lithium metasilicate, 5~10 parts of gluconate, 3~5 parts of isobutyl triethoxy silane.The present invention is because only use cement, quartz sand, complex catalyst, four kinds of Matter Compositions of zeolite waterproofing agent, and four kinds of Matter Composition prices are all very limited, so low manufacture cost, easily promotes;In addition, water resistance is greatly improved;Also either composition is constituted, is used for, and can meet the related request of national green environment-friendly building materials product.

Description

Cementitious capillary waterproofing material
Technical field
The invention belongs to building material technical field, and in particular to a kind of cementitious capillary waterproofing material.
Background technology
As concrete is largely used in construction, the durability deficiency problem of concrete structure increasingly causes people Attention, the infiltration of its reclaimed water is to cause concrete deterioration, reduces the major reason of its durability, therefore, it is necessary to coagulation Soil carries out water-proofing treatment to avoid concrete from producing deterioration, improve its durability." permeable crystalline waterproofing material " abbreviation CCCW (Cementitious Capillary Crystalline Waterproofing Materials), as a kind of novel rigid Waterproof material, can preferably solve the problems, such as concrete water-permeating, it in 20th century the eighties entered in the way of SMD core master batches Enter China market, because its price, be not easy to promote at home.It is this there has been proposed many " cement-base infiltration crystallization types The technical scheme of waterproof material ", such as notification number:CN 101830674A " a kind of cementitious capillary waterproofing material ", bulletin Number:CN 102786275A " cementitious capillary waterproofing material ", notification number:CN 101074355B " cement-based penetrant knots Crystal formation waterproof material and preparation method thereof ", notification number:A kind of CN 104355584A " cement-base infiltration crystallization type buildings waterproof materials The technical schemes such as material ".These many technical schemes have a common and respective advantage, common advantage be price be all far below into " cementitious capillary waterproofing material " of mouth, but there is also common shortcoming, that is, the Matter Composition sample number for constituting is more, so Its price is reduced again has any problem;In addition, the performance of its waterproof still has gap with " the cement-base infiltration crystallization type water-proof material " of import.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, there is provided a kind of cementitious capillary waterproofing material, The Matter Composition that it is constituted is simple, and several Matter Composition prices are low, so the waterproof material low manufacture cost of composition, easily pushes away Extensively;In addition, water resistance is greatly improved;Further, either composition is constituted, is used for, and can meet national green The related request of environment-friendly building materials product.
Above-mentioned goal of the invention is achieved through the following technical solutions, a kind of cementitious capillary waterproofing material, It is characterized by:The waterproof material is mixed by the component of following weight proportion:56~62 parts of cement, 27 parts of quartz sand~ 33 parts, 7~11 parts of complex catalyst, 1~3 part of zeolite waterproofing agent;Described complex catalyst by following weight proportion component It is mixed and modified to form:87~75 parts of zeolite powder, 5~10 parts of lithium metasilicate, 5~10 parts of gluconate, isobutyl triethoxy silane 3~5 parts.
Preferably, described zeolite waterproofing agent is modified zeolite, aliphatic acid, the surface-modified treatment of silane Composite Milk again Rubber powder, cellulose ether are formed.
Preferably, described gluconate be one kind in calcium gluconae, sodium gluconate, magnesium gluconate or More than two kinds.
Beneficial effects of the present invention are as follows:Because this waterproof material is only prevented with cement, quartz sand, complex catalyst, zeolite Four kinds of Matter Compositions of aqua, and four kinds of Matter Composition prices are all very limited, so low manufacture cost, easily promotes;And four kinds of things Zeolite waterproofing agent in matter composition, with grade natural zeolite high as primary raw material, using its distinctive adsorptivity, ion exchange Property, acid resistance, alkali resistance, by the way that activation, roasting, surface be modified etc., series of process processes forms, and is to collect closely knit, bleed, hate The water-proofing anticracking such as water, secondary crystallization, microdilatancy, decrement mechanism is in the multifunctional mortar of one.Its water-proof mechanism:Modified treatment Zeolite crystallite afterwards can improve the uniformity of cement mixture, workability, promote hydrated cementitious and form hydrophobic adsorption layer and not Dissolubility colloidal substance, filling concrete capillary slit prevents water translocation, reduces water absorption, improves hydrophobicity and impermeability.Due to Zeolite is rich in SiO2, activity A12O3And various trace elements, the hydration reaction of continuous uniform can be carried out with cement, generation has The calcium sulphoaluminate of micro-expansibility is entringite, can play a part of compensation and shrink;Due to the zeolite through silane surface modified treatment, The surface tension of Behavior of Hardened Cement Paste can be significantly reduced, reduces the negative pressure produced after cement pore dehydration, so as to reduce the dry of Behavior of Hardened Cement Paste Contracting.Activated silica and activated aluminum in zeolite, can participate in Binder Materials hydration and hardening, generate hydrated calcium silicate and calcium aluminate, increase Gelled product, improvement gathers materials cementing with Binder Materials, increases density, improves compression strength.Simultaneously can also be with hydrated cementitious There is secondary response in the calcium hydroxide and gypsum for producing afterwards, generation hydrophobicity crystalline material blocks pore, seam, further improves Density and crack self-healing.The special porous rack-like structure of zeolite and pozzolanic activity, moreover it is possible to reduce hydration heat of cement and Suppress alkali-aggregate reaction, make waterproof effect that there are long-time stability.Cementitious capillary waterproofing material of the invention is adopted With complexing-precipitation reaction mechanism, the chemism that can be complexed with calcium ion is there is in cementitious capillary waterproofing material Material-complex catalyst, under the collective effect of concentration and pressure differential, complex catalyst is penetrated into concrete by carrier of water Portion, when by calcium hydroxide high concentration region, with the calcium ion complexing that ionizes out in concrete, forms soluble in water unstable Calcium complex.Complex compound spreads with water in concrete pore, runs into activity unhydrated cement, cement gel body higher Deng active chemistry will be replaced by more stable silicate, aluminate etc., and crystallization, precipitation reaction occur, so as to by hydrogen-oxygen Change calcium and be converted into the crystalline compounds with some strength, be filled in crack and capillary porosity in concrete.And activity chemistry Material then becomes free radical again, and continuation is internally migrated with water.When concrete is in drying regime, it is situated between due to lacking diffusion Matter, active material is in " dormancy " state, and when there is water to penetrate into, active material will be activated once again, and catalysis occurs new crystallization Reaction, makes structurally waterproof.Therefore, such material has permanent waterproof characteristic.
Description more than shows that the present invention can be summarized as follows with the difference of prior art:
Complex catalyst is different.The present invention using natural zeolite physicochemical property, mainly adsorptivity and ion exchangeable is by silicon Sour lithium, gluconate, isobutyl triethoxy silane absorption wrap up zeolite microparticles surface, structure in zeolite nanoaperture Into core component complex catalyst.
The compositing formula of material is different.The most basic material composition of cement based penetration crystallization type water proofing paint is by silicate Cement, catalyst, quartz sand, silicon ash, siliceous miberal powder, water-loss reducer composition.But because its early stage impermeability pressure is not high, and crystallize Process time is more long, in order to coating hardening can meet water-tight requirement after improving the early stage impermeability of material and constructing, only Waterproof requirement could be accelerated by combination of materials technology, therefore this technology has been further added by zeolite on the basis of existing conventional techniques Waterproofing agent component, significantly improves the early stage impermeability and water proofing property of material.The present invention is not only suitable for concrete structure upstream face First waterproof, waterproofing and leakage-stopping is administered after being also suitable for concrete structure back side.
Because above-mentioned reason, this waterproof material has as described above than general cement-base infiltration crystallization:Increased The performance advantages such as closely knit, bleed, hydrophobic, secondary crystallization, microdilatancy, decrement, make water resistance be greatly improved, can with enter " cementitious capillary waterproofing material " of mouth compares favourably.Further, either composition is constituted, is used for the present invention, is all accorded with Close radionuclide limitation and the requirement of ammonia burst size standard, national Drinking Water product use requirement, national green environmental protection are built The related requests such as material product use requirement.
Brief description of the drawings
Fig. 1:The Indexes Comparison table of embodiment of the present invention product and same kind of products at abroad.
Specific embodiment
Below in conjunction with Fig. 1, the invention will be further described, a kind of cementitious capillary waterproofing material, the waterproof Material is mixed by the component of following weight proportion:59 parts of cement, 30 parts of quartz sand, 9 parts of complex catalyst, zeolite waterproofing agent 2 parts;Described complex catalyst mixed and modified is formed by the component of following weight proportion:80 parts of zeolite powder, 7 parts of lithium metasilicate, Portugal 7 parts of grape sugar lime, 5 parts of isobutyl triethoxy silane;Described zeolite waterproofing agent is modified zeolite, aliphatic acid, silane through table Composite Milk rubber powder, cellulose ether are formed face modification again;Described gluconate is calcium gluconae.

Claims (3)

1. a kind of cementitious capillary waterproofing material, it is characterised in that:The waterproof material by following weight proportion group Divide and mix:56~62 parts of cement, 27 parts~33 parts of quartz sand, 7~11 parts of complex catalyst, 1~3 part of zeolite waterproofing agent; Described complex catalyst mixed and modified is formed by the component of following weight proportion:87~75 parts of zeolite powder, lithium metasilicate 5~10 Part, 5~10 parts of gluconate, 3~5 parts of isobutyl triethoxy silane.
2. cementitious capillary waterproofing material according to claim 1, it is characterised in that:Described zeolite waterproofing agent For modified zeolite, aliphatic acid, Composite Milk rubber powder, cellulose ether are formed the surface-modified treatment of silane again.
3. cementitious capillary waterproofing material according to claim 1 and 2, it is characterised in that:Described glucose Hydrochlorate is one or two or more kinds in calcium gluconae, sodium gluconate, magnesium gluconate.
CN201611125889.1A 2016-12-09 2016-12-09 Cementitious capillary waterproofing material Active CN106747081B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611125889.1A CN106747081B (en) 2016-12-09 2016-12-09 Cementitious capillary waterproofing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611125889.1A CN106747081B (en) 2016-12-09 2016-12-09 Cementitious capillary waterproofing material

Publications (2)

Publication Number Publication Date
CN106747081A true CN106747081A (en) 2017-05-31
CN106747081B CN106747081B (en) 2019-09-10

Family

ID=58877592

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611125889.1A Active CN106747081B (en) 2016-12-09 2016-12-09 Cementitious capillary waterproofing material

Country Status (1)

Country Link
CN (1) CN106747081B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109704661A (en) * 2019-03-04 2019-05-03 上海会当防水材料有限公司 A kind of cement based penetration crystallization type water proofing paint
CN111574879A (en) * 2020-05-26 2020-08-25 安徽工业大学 Semi-dry desulfurization ash-based interior wall putty powder without oxidation treatment and preparation method thereof
CN112142437A (en) * 2020-09-14 2020-12-29 安徽朗凯奇防水科技股份有限公司 Cement-based capillary crystalline waterproof material and preparation method thereof
CN114685093A (en) * 2022-04-27 2022-07-01 长沙标朗住工科技有限公司 Wall-repairing paste and preparation method and application thereof
CN117003507A (en) * 2023-08-07 2023-11-07 贵州钰琦盛达实业有限公司 High-efficiency waterproof polysilicone permeable crystallization type waterproof coating

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130496A (en) * 1997-10-30 1999-05-18 Kubota Corp Production of water repellent ceramic based building material
CN101117280A (en) * 2007-05-10 2008-02-06 陈土兴 Sand pulp concrete waterproof agent and method for making same
CN101830674B (en) * 2010-05-12 2012-02-08 中国建筑材料科学研究总院苏州防水研究院 Cementitious capillary crystalline waterproof material
CN104402289A (en) * 2014-11-26 2015-03-11 金华市欣生沸石开发有限公司 Zeolite cement mortar waterproof agent and preparation method thereof
CN104844079A (en) * 2015-04-03 2015-08-19 杭州泰正建材有限公司 Cement-based capillary crystalline waterproof material and preparation method thereof
CN104961415A (en) * 2015-06-10 2015-10-07 金华市欣生沸石开发有限公司 Concrete crack resistance silicon waterproof agent
CN105272065A (en) * 2015-11-18 2016-01-27 南阳理工学院 Cement-based permeable crystallization type waterproof material for buildings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11130496A (en) * 1997-10-30 1999-05-18 Kubota Corp Production of water repellent ceramic based building material
CN101117280A (en) * 2007-05-10 2008-02-06 陈土兴 Sand pulp concrete waterproof agent and method for making same
CN101830674B (en) * 2010-05-12 2012-02-08 中国建筑材料科学研究总院苏州防水研究院 Cementitious capillary crystalline waterproof material
CN104402289A (en) * 2014-11-26 2015-03-11 金华市欣生沸石开发有限公司 Zeolite cement mortar waterproof agent and preparation method thereof
CN104844079A (en) * 2015-04-03 2015-08-19 杭州泰正建材有限公司 Cement-based capillary crystalline waterproof material and preparation method thereof
CN104961415A (en) * 2015-06-10 2015-10-07 金华市欣生沸石开发有限公司 Concrete crack resistance silicon waterproof agent
CN105272065A (en) * 2015-11-18 2016-01-27 南阳理工学院 Cement-based permeable crystallization type waterproof material for buildings

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109704661A (en) * 2019-03-04 2019-05-03 上海会当防水材料有限公司 A kind of cement based penetration crystallization type water proofing paint
CN111574879A (en) * 2020-05-26 2020-08-25 安徽工业大学 Semi-dry desulfurization ash-based interior wall putty powder without oxidation treatment and preparation method thereof
CN112142437A (en) * 2020-09-14 2020-12-29 安徽朗凯奇防水科技股份有限公司 Cement-based capillary crystalline waterproof material and preparation method thereof
CN112142437B (en) * 2020-09-14 2022-03-18 安徽朗凯奇防水科技股份有限公司 Cement-based capillary crystalline waterproof material and preparation method thereof
CN114685093A (en) * 2022-04-27 2022-07-01 长沙标朗住工科技有限公司 Wall-repairing paste and preparation method and application thereof
CN117003507A (en) * 2023-08-07 2023-11-07 贵州钰琦盛达实业有限公司 High-efficiency waterproof polysilicone permeable crystallization type waterproof coating
CN117003507B (en) * 2023-08-07 2023-12-29 贵州钰琦盛达实业有限公司 High-efficiency waterproof polysilicone permeable crystallization type waterproof coating

Also Published As

Publication number Publication date
CN106747081B (en) 2019-09-10

Similar Documents

Publication Publication Date Title
CN106747081B (en) Cementitious capillary waterproofing material
CN101439955B (en) Preparation of 06 grade gypsum based autoclave-free aerated concrete building blocks
CN101581131B (en) Non-autoclaved aerated concrete building block and manufacturing method
CN110981374A (en) Cement-based capillary crystalline building waterproof material and preparation method thereof
CN112408926A (en) Anti-cracking recycled concrete and preparation method thereof
CN112194440B (en) Alkali-resistant and anti-permeability waterproof slurry and construction process thereof
CN110550901A (en) Cement-based capillary crystalline waterproof coating
CN112723807B (en) Seawater-mixed underwater undispersed concrete and preparation method thereof
CN215975567U (en) Phosphogypsum microsphere aggregate for cement mortar
CN106966628B (en) A kind of slow-release Quadrafos curing agent and preparation method thereof and its preparing the application in waterglass cured product
CN101830674B (en) Cementitious capillary crystalline waterproof material
CN114804785A (en) Design method for efficient carbon fixation cement-based material self-layering structure
CN112830728B (en) Self-maintenance permeable crystallization material for secondary grouting of shield, preparation method and application
CN112142437B (en) Cement-based capillary crystalline waterproof material and preparation method thereof
CN115160801A (en) Enhanced organic silicon microcapsule gypsum waterproof emulsion and preparation method and application thereof
CN110668770B (en) Preparation method of environment-friendly building heat-insulating material
CN110615651B (en) Environment-friendly building heat-insulating material
CN112279551A (en) Preparation method of anti-cracking additive for concrete
CN113200705A (en) Preparation method of four-arm anti-permeability compacting agent
CN113429145A (en) Method for preparing cement-based wet-mixed mortar aggregate by modifying phosphogypsum and mortar
CN110981402A (en) High-strength stone-like brick and preparation method thereof
CN117003507B (en) High-efficiency waterproof polysilicone permeable crystallization type waterproof coating
CN112573882B (en) Photocatalytic cement mortar containing boron, carbon and nitrogen and preparation method thereof
CN114163200B (en) Efficient inorganic rigid waterproof coating and using method thereof
CN112250475B (en) Inorganic concrete sealing curing agent and preparation method and application thereof

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
GR01 Patent grant
GR01 Patent grant