Dry putty powder and fast-drying putty thereof

Abstract

A dry putty powder comprising 45wt% to 50wt% of a fiber cement sheet dust comprising silica with a particle size distribution in a range of 50 mµ to 75 mµ, a plurality of cellulose fibers with a length in a range of 0.5 mm to 4.0 mm, and Portland cement with a particle size distribution in a range of 53 mµ to 75 mµ, 5wt% to 10wt% silica aerogel, 5wt% to 10wt% of metakaolin, 4wt% to 10wt% ethylene vinyl acetate, and 10wt% to 40wt% of white cement, wherein all percentages by weight are based on a total weight of the dry putty powder, such that a fast-drying putty obtained by adding water to the dry putty powder shows a drying time in a range of 10 minutes to 15 minutes after coating on a substrate.

Description

REF-1404-02-001DRY PUTTY POWDER AND FAST-DRYING PUTTY THEREOF CROSS REFERENCE TO REEATED APPEICATION

[0001] The present disclosure application claims priority from pending IR Patent Application Serial No 140350140003008721, filed on March 16, 2025, entitled “Dry Putty Powder Based on Powder Waste from Cutting and Processing Cement Fiber Sheets With A Faster Drying Time”, which is incorporated by reference herein in its entirety.TECHNICAL FIELD

[0002] The present disclosure is generally related to an exemplary dry putty powder for coating on an exemplary substrate, and more particularly to an exemplary dry putty powder based on an exemplary fiber cement sheet dust and an exemplary fast-drying putty thereof for coating on an exemplary substrate with an exemplary drying time less than 15 minutes.BACKGROUND

[0003] A Putty powder is a commonly used material in the construction and building repair industry, primarily utilized for a surface preparation by filling and smoothing uneven areas. It is widely applied to address cracks, seams, and surface imperfections on walls and ceilings, ensuring a uniform and level substrate. This preparation is essential for achieving optimal results in subsequent applications such as painting, wallpaper installation, and other decorative finishes. Its versatility and ease of application make it an essential component in construction, renovation, and maintenance processes.

[0004] On the other hand, conventional putty powders used in construction and repair applications present several challenges due to their component materials. A primary issue is an extended drying time of an applied putty on surfaces. In order to achieve a smooth finish, the putty typically must be applied in two layers, each with a thickness of approximately 1REF-1404-02-001millimeter. The curing process and strength development of each layer takes over 24 hours, resulting in increased preparation time and delays in project timelines.

[0005] Additionally, a formation of a necessary crystalline structure in the putty is highly dependent on ambient humidity conditions. When conditions are not optimal, this structure fails to form correctly, which compromises the putty’s strength and makes it more susceptible to cracking and surface damage. This issue becomes particularly pronounced when the surface is too dry or too moist, which can detrimentally affect the final quality of the coating.

[0006] Furthermore, the presence of calcium hydroxide in the conventional putty powders poses significant health and safety risks. When reacting with moisture, calcium hydroxide forms lime, which can be harmful to users, causing respiratory issues, skin irritation, and other health hazards. These above-mentioned limitations highlight a need for an improved putty composition that addresses these drying time, environmental sensitivity, and safety concerns while offering better performance and efficiency in surface preparation.

[0007] Therefore, herein a cost-effective, safe, and easy-to-use dry putty powder is developed that can provide a fast drying putty with a drying time less than 15 minutes and enhanced strength.SUMMARY

[0008] This summary is intended to provide an overview of the subject matter of the present disclosure, and is not intended to identify essential elements or key elements of the subject matter, nor is it intended to be used to determine the scope of the claimed implementations. Its sole purpose is to present some concepts of one or more exemplary aspects in a simplified form as a prelude to the more detailed description that is presented later. The proper scope of the present disclosure may be ascertained from the claims set forth below in view of the detailed description below and the drawings.REF-1404-02-001

[0009] One or more exemplary embodiments describe an exemplary dry putty powder for coating on a substrate. Exemplary dry putty powder may comprise an exemplary fiber cement sheet waste, an exemplary silica aerogel, an exemplary metakaolin, an exemplary ethylene-vinyl acetate, and an exemplary white cement.

[0010] In an exemplary embodiment, exemplary fiber cement sheet waste content may be in a range of 45wt% to 50wt% in accordance with an exemplary total weight of exemplary dry putty powder. In an exemplary embodiment, exemplary fiber cement sheet waste may comprise a fiber cement sheet dust. In one or more exemplary embodiments, exemplary fiber cement sheet waste may comprises an exemplary silicon compound, an exemplary plurality of cellulose fibers, and an exemplary Portland cement. In some exemplary embodiments, exemplary silicone compound may comprise silicon dioxide. In one or more exemplary embodiments, exemplary fiber cement sheet waste may comprise an exemplary fiber cement sheet dust that exemplary fiber cement sheet dust may comprise an exemplary silica with an exemplary particle size distribution in an exemplary range of 50 mp to 75 mp, an exemplary plurality of cellulose fibers with an exemplary length in a range of 0.5 mm to 4.0 mm, and an exemplary Portland cement with an exemplary particle size distribution in an exemplary range of 53 mp to 75 mp. In one or more exemplary embodiments, exemplary fiber cement sheet dust may comprise 40wt% to 45%wt% exemplary silica, 10wt% to 15%wt exemplary plurality of cellulose fibers, and 40wt% to 60%wt exemplary Portland cement in accordance with an exemplary total weight of exemplary fiber cement sheet dust. In an exemplary embodiment, an exemplary average particle size of exemplary fiber cement sheet dust may be less than 75 mp, more particularly in an exemplary range of 50 mp to 75 mp.

[0011] In an exemplary embodiment, an exemplary silica aerogel content may be in an exemplary range of 5wt% to 10wt% in accordance with an exemplary total weight of exemplary dry putty powder. In an exemplary embodiment, an exemplary metakaolin content may be in aREF-1404-02-001range of 5wt% to 10wt% in accordance with an exemplary total weight of exemplary dry putty powder. In an exemplary embodiment, an exemplary ethylene- vinyl acetate content may be in an exemplary range of 4wt% to 10wt% in accordance with an exemplary total weight of exemplary dry putty powder. In an exemplary embodiment, an exemplary white cement content may be in range of 10wt% to 40wt% in accordance with an exemplary total weight of exemplary dry putty powder.

[0012] Furthermore, One or more exemplary embodiments describe an exemplary fastdrying putty produced by adding an exemplary water to exemplary dry putty powder in an exemplary weight ratio (water: dry putty powder) of 1:1, 2:1, or 3:1. In an exemplary embodiment, an exemplary drying time of exemplary fast-drying putty after coating on an exemplary substrate may be in an exemplary range of 10 minutes to 15 minutes. In one or more exemplary embodiments, exemplary fast-drying putty may have an exemplary fast-drying putty adhesion strength more than 1.5 MPa, more particularly in an exemplary range of 1.5 MPa to 3 MPa, an exemplary water retention capacity of 99%, an exemplary pendulum hardness of 145 seconds, and an exemplary pH in an exemplary range of 10 to 12.

[0013] This Summary may introduce a number of concepts in a simplified format; the concepts are further disclosed within the “Detailed Description” section. This Summary is not intended to configure essential / key features of the claimed subject matter, nor is intended to limit the scope of the claimed subject matter.DETAILED DESCRIPTION

[0014] In the following detailed description, numerous specific details are set forth by way of examples to provide a thorough understanding of the relevant teachings related to the exemplary embodiments. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures,REF-1404-02-001components, and / or circuitry have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings.

[0015] The following detailed description is presented to enable a person skilled in the art to make and use the methods and devices disclosed in one or more exemplary embodiments of the present disclosure. For purposes of explanation, specific nomenclature is set forth to provide a thorough understanding of the present disclosure. However, it will be apparent to one skilled in the art that these specific details are not required to practice the disclosed exemplary embodiments. Descriptions of specific exemplary embodiments are provided only as representative examples. Various modifications to the exemplary implementations will be plain to one skilled in the art, and the general principles defined herein may be applied to other implementations and applications without departing from the scope of the present disclosure. The present disclosure is not intended to be limited to the implementations shown, but is to be accorded the widest possible scope consistent with the principles and features disclosed herein.

[0016] Disclosed herein is an exemplary dry putty powder for coating on an exemplary substrate. In an exemplary embodiment, an exemplary dry putty powder may be comprise an exemplary fiber cement sheet dust with an exemplary average particle size of 50 pm to 75pm. In an exemplary embodiment, "fiber cement sheet dust" may refer to a byproduct produced during the cutting, drilling, sanding, or grinding of a plurality of fiber cement sheets, comprising a mixture of materials, including cement, silica, and cellulose fibers. An exemplary dry putty powder containing an exemplary fiber cement sheet dust may have advantages such as an exemplary fast drying time, an exemplary enhanced strength, and an exemplary environmental-friendly use.

[0017] In an exemplary embodiment, an exemplary dry putty powder may comprise an exemplary fiber cement sheet waste, an exemplary silica aerogel, an exemplary metakaolin, an exemplary ethylene vinyl acetate, and an exemplary white cement. In one or more exemplaryREF-1404-02-001embodiments, exemplary dry putty powder may have an exemplary average particle size less than 75 mp, more particularly in a range of 50 mp to 75 mp.

[0018] In further details with exemplary dry putty powder composition, exemplary dry putty powder may comprise an exemplary fiber cement sheet waste. “Fiber cement sheet waste” may refer to a discarded material generated during a production, cutting, and / or processing of a plurality fiber cement sheets with an exemplary average particle size less than 100 mp. In an exemplary embodiment, exemplary fiber cement sheet waste may comprise an exemplary silicon compound, an exemplary plurality of cellulose fibers, and an exemplary Portland cement. In one or more exemplary embodiments, exemplary fiber cement sheet may have an exemplary average particle size less than 75 mp, more particularly in an exemplary range of 50 mp to 75 mp. In one or more exemplary embodiments, exemplary silicon compound may comprise an exemplary silicon dioxide, an exemplary micro silicon dioxide, an exemplary nano silicon dioxide, and / or an exemplary combination thereof. “Silicon dioxide” and / or “silica” may refer to a compound composed of silicon and oxygen with a chemical structure of SiO2which is a versatile material commonly found in nature as quartz and used extensively in industries as a reinforcing filler due to its structural and thermal properties. In a particular exemplary embodiment, exemplary silicon compound may comprise silicon dioxide with an exemplary particle size distribution in an exemplary range of 50 mp to 75 mp. In an exemplary embodiment, exemplary fiber cement sheet waste content may be in an exemplary range of 45wt% to 50wt% in accordance with an exemplary total weight of exemplary dry putty powder.

[0019] In an exemplary embodiment, exemplary fiber cement sheet waste may comprise an exemplary fiber cement sheet dust. “Fiber cement sheet dust” may refer to a fine particulate matter generated during a cutting, sanding, and / or processing of a plurality of fiber cement sheets. In one or more exemplary embodiments, exemplary fiber cement sheet dust mayREF-1404-02-001comprise silicon dioxide with an exemplary particle size distribution in an exemplary range of 50 mp to 75 mp, an exemplary plurality of cellulose fibers with an exemplary length in an exemplary range of 0.5 mm to 4.0 mm, and an exemplary Portland cement with an exemplary particle size distribution in an exemplary range of 53 mp to 75 mp. In one or more exemplary embodiments, an exemplary silica content, an exemplary cellulose fibers content, and an exemplary Portland cement content may be in an exemplary range of 40wt% to 45%wt%, 10wt% to 15%wt, and 40wt% to 60%wt, respectively, in accordance with an exemplary total weight of exemplary fiber cement sheet dust. In one or more exemplary embodiments, an exemplary average particle size of exemplary fiber cement sheet dust may be less than 75, more particularly in an exemplary range of 50 mp to 75 mp.

[0020] In further details with exemplary dry putty powder composition, exemplary dry putty powder may comprise an exemplary silica aerogel. “Silica aerogel” may refer to a highly porous, lightweight material made from a silica gel through a process that removes the liquid content, resulting in a solid with extremely low density and high surface area, which exhibits excellent water absorption properties due to its large internal surface and porosity. In one or more exemplary embodiments, an exemplary silica aerogel content may be adjusted in an exemplary range of 5wt% to 10wt% in accordance with an exemplary total weight of exemplary dry putty powder. The incorporation of exemplary silica aerogel into exemplary dry putty powder may lead to a reduction in an exemplary total weight of exemplary dry putty powder, enhancing crack resistance, reduced water permeability of an exemplary produced putty from exemplary dry putty after coating on an exemplary substrate, and improve an exemplary putty fire resistance. In one or more exemplary embodiments, exemplary silica aerogel may have an exemplary particle size less than 100 nm.

[0021] In further details with exemplary dry putty powder composition, exemplary dry putty powder may comprise an exemplary metakaolin. “Metakaolin” may refer to aREF-1404-02-001dehydroxylated form of kaolin obtained through a thermal process of heating kaolinite that can acts as a filler as well as a pozzolanic material to enhance the mechanical properties of a putty. In an exemplary embodiment, an exemplary metakaolin content may be adjusted in an exemplary range of 5wt% to 10wt% in accordance with exemplary total weight of exemplary dry putty powder. The incorporation of exemplary metakaolin into exemplary dry putty powder may result in increased strength, improved adhesive bonding, enhanced stability, and reduced shrinkage and permeability of an exemplary final putty. In one or more exemplary embodiments, kaolinite, calcium chloride, nano silica, micro silica, and / or an exemplary combination thereof may be used as an exemplary substitute for exemplary metakaolin and / or in combination with exemplary metakaolin in exemplar dry putty powder.

[0022] In further details with exemplary dry putty powder composition, exemplary dry putty powder may comprise an exemplary metakaolin exemplary ethylene-vinyl acetate. “Ethylene-vinyl acetate”, “EVA”, and / or “poly(ethylene-vinyl acetate)” , “PEVA” may refer to a copolymer of ethylene and vinyl acetate with a molecular weight in a range of 100-150 g / mol and a weight content of ethylene in a range of 10-40% by weight in accordance with a total weight of the EVA copolymer. In an exemplary embodiment, an exemplary EVA content may be in an exemplary range of 4wt% to 10wt% in accordance with exemplary total weight of exemplary dry putty powder.

[0023] Furthermore, in further details with exemplary dry putty powder composition, exemplary dry putty powder may comprise an exemplary white cement. In an exemplary embodiment, exemplary white cement content may be in an exemplary range of 10wt% to 40wt% in accordance with exemplary total weight of exemplary dry putty powder.

[0024] In one or more exemplary embodiments, exemplary dry putty powder may further comprise an exemplary pigment. An exemplary pigment content may be varied based on an exemplary desired lightness level or an exemplary desired darkness level of an exemplar puttyREF-1404-02-001color produced from exemplary dry putty powder. In one or more exemplary embodiments, exemplary pigment content may be adjusted in an exemplary range of 3wt% to 5wt% in accordance with exemplary total weight of exemplary dry putty powder.

[0025] In an exemplary embodiment, exemplary dry putty powder according to one or more exemplary embodiments of the present disclosure may have an exemplary water absorption capacity of 3%. Furthermore, in one or more exemplary embodiments, exemplary dry putty powder may have an exemplary density in an exemplary range of 1.13 g / cm3to 1.40 g / cm3.

[0026] In an exemplary embodiment, an exemplary fast-drying putty may be obtained by adding an exemplary water to disclosed exemplary dry putty powder in one or more exemplary embodiments of the present disclosure. In one or more exemplary embodiments, exemplary water may be added to exemplary dry putty powder with an exemplary desired weight ratio (water to dry putty powder) in accordance with exemplary application of exemplary fast-drying putty as well as an exemplary desired putty adhesion and mechanical properties. In an exemplary embodiment, an exemplary weight ratio of water to dry putty powder (water: dry putty powder) may be 1 : 1 , 2: 1 , or 3 : 1.

[0027] In one or more exemplary embodiment, exemplary fast-drying putty may have an exemplary drying time in an exemplary range of 10 minutes to 15 minutes after coating on an exemplary substrate. “Substrate” may refer to a surface of a construction made of, for example, but is not limited to, a plaster, a fiber cement sheet, a cement board, etc. In one or more exemplary embodiments, an exemplary pH of exemplary fast-drying putty may be in an exemplary range of 10 to 12. Additionally, in one or more exemplary embodiments, exemplary fast-drying putty may have an exemplary adhesion strength more than 1.5 MPa, more particularly in an exemplary range of 1.5MPa to 3.0 MPa. Furthermore, in one or more exemplary embodiments, an exemplary water retention capacity of exemplary fast-drying puttyREF-1404-02-001may be 99%. In addition, exemplary fast-drying putty may have an exemplary pendulum hardness of 145 seconds.EXAMPLES

[0028] Hereinafter, one or more exemplary embodiments will be described in further detail with reference to examples. It will be obvious to a person having ordinary skill in the art that these examples may be for illustrative purposes only and are not to be interpreted to limit the scope of the present disclosure.Example 1: Preparation of A Dry Putty Powder and A Fast-Drying Putty Thereof

[0029] In this example, exemplary dry putty powder was prepared based on one or more exemplary embodiments of the present disclosure. To preparation of 100 g of exemplary dry putty powder, 45-50 g of an exemplary fiber cement sheet dust comprising an exemplary silica with an exemplary particle size distribution of 50-75 mp, an exemplary plurality of cellulose fibers with an exemplary length of 0.5- 4.0 mm, and an exemplary Portland cement with an exemplary particle size distribution of 53-75 mp was mixed to 5-10 g silica aerogel nanoparticles, 5-10 g metakaolin, 4-10 g ethylene vinyl acetate, and 10-40g white cement.

[0030] Furthermore, to preparation of an exemplary fast-drying putty, 200 ml water was added to 100 g of exemplary produced dry putty powder in an exemplary container and stirring for a time duration of about 5-10 minutes at a room temperature. Exemplary prepared fastdrying putty is stable for more than 3 hours and less than 24 hours and can be coated on an exemplary substrate.Example 2: Characterization of Dry Putty Powder and Fast-Drying Putty Thereof

[0031] In this example, an exemplary plurality of physical properties of exemplary produced dry putty powder as well as exemplary produced fast-drying putty in “Example 1” were evaluated and listed in Table.l.Table.l: Physical Properties and Particle size of Exemplary Dry Putty Powder and Exemplary Fast-Drying PuttyREF-1404-02-001

[0032] Exemplary results set forth in Table 1 indicate exemplary dry putty powder have a milky color, an exemplary average particle size of 55 pm, and an exemplary density of 1.13-1.40 g / cm3. Furthermore, exemplary dry putty powder shows an exemplary water absorption capacity about 3%. In addition, exemplary fast-drying putty indicates an exemplary pH level in a range of 10 to 12.

[0033] Additionally, to evaluate an exemplary putty drying time, exemplary produced fast-drying putty in “Example 1” was coated on an exemplary substrate and exemplary putty drying time is monitored. Exemplary result illustrates that exemplary coated fast-drying putty was dried in an exemplary drying time of 10 minutes to 15 minutes under standard conditions. After passing exemplary putty drying time, if needed, an exemplary second layer of exemplary fast-drying putty can be coated on exemplary dried coated fast-drying putty.

[0034] Furthermore, exemplary produced fast-drying putty in “Example 1” can remain stable at an exemplary room temperature (25°C) for over 3 hours and up to 24 hours. It retains exemplary fast-drying putty’s applicability on various surfaces, making exemplary fast-drying putty suitable for efficient and rapid finishing work.

[0035] In addition, to investigate en exemplary adhesion strength of exemplary produce fast-drying putty in “Example 1”, an exemplary adhesion test was conducted in accordance with ASTM D4541 using a PosiTest AT-M device from DeFelsko. In exemplary adhesion test, an exemplary smooth section of exemplary dried coated fast-drying putty was selected and attached to an exemplary loading fixture of the device utilizing an exemplary adhesive,REF-1404-02-001followed by an exemplary curing period of 24 hours, and exemplary adhesion test was performed continuously at an exemplary loading rate of less than 1 MPa / s. Exemplary results indicate that an exemplary adhesion strength of exemplary produce fast-drying putty is about 3 MPa, which is three times higher than an exemplary conventional putty (Table. 2)Table.2: Adhesion Strength of Exemplary Produced Fast-Drying Putty

[0036] Additionally, an exemplary pendulum hardness of exemplary coated fast-drying putty on exemplary substrate was investigated using a Persoz pendulum according to ASTM D4366. Exemplary pendulum hardness was measured by observing a damping of exemplary Persoz pendulum’s swing across an exemplary surface of exemplary coated fast-drying putty on exemplary substrate and exemplary result was recorded in seconds, which directly correlate to exemplary pendulum hardness. Exemplary result indicates that exemplary coated fast-drying putty on exemplary substrate has a hardness of 145 seconds.

[0037] Furthermore, mechanical properties of exemplary produced fast-drying putty in “Example 1” was evaluated by tensile and compression mechanical tests. Table.3 below shows exemplary results of tensile and compression mechanical tests of exemplary produced fastdrying putty.Table.3: Mechanical Properties of Exemplary Produced Fast-Drying Putty

[0038] Exemplary results presented in Table 3 demonstrate that exemplary producec fast-drying putty exhibits an exemplary tensile strength of 1.2 MPa, an exemplary elongation at break of 1.3%, and an exemplary compression strength of 15 MPa, all of which contribute to exemplary fast-drying putty’s high performance and suitability for use as a putty.REF-1404-02-001

[0039] While the foregoing has described what are considered to be the best mode and / or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and that the teachings may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all applications, modifications and variations that fall within the true scope of the present teachings.

[0040] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, including in the claims that follow, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0041] The scope of protection is limited solely by the claims that now follow. That scope is intended and should be interpreted to be as broad as is consistent with the ordinary meaning of the language that is used in the claims when interpreted in light of this specification and the prosecution history that follows and to encompass all structural and functional equivalents. Notwithstanding, none of the claims are intended to embrace subject matter that fails to satisfy the requirement of Sections 101, 102, or 103 of the Patent Act, nor should they be interpreted in such a way. Any unintended embracement of such subject matter is hereby disclaimed.

[0042] Except as stated immediately above, nothing that has been stated or illustrated is intended or should be interpreted to cause a dedication of any component, step, feature, object, benefit, advantage, or equivalent to the public, regardless of whether it is or is not recited in the claims.

[0043] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study except where specific meanings have otherwise been setREF-1404-02-001forth herein. Relational terms such as first and second and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions. An element proceeded by “a” or “an” does not, without further constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0044] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0045] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study, except where specific meanings have otherwise been set forth herein. Relational terms such as “first” and “second” and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions.

[0046] The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it may be seen that various features are grouped together in various implementations. This is for purposes of streamlining the disclosure, and is not to be interpreted as reflecting an intention that the claimed implementations require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed implementation. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separately claimed subject matter.REF-1404-02-001While various implementations have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more implementations and implementations are possible that are within the scope of the implementations. Any feature of any implementation may be used in combination with or substituted for any other feature or element in any other implementation unless specifically restricted. Therefore, it will be understood that any of the features shown and / or discussed in the present disclosure may be implemented together in any suitable combination. Accordingly, the implementations are not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.

Claims

REF-1404-02-001What is claimed is:

1. A dry putty powder comprising:45wt% to 50wt% of a fiber cement sheet dust comprising silica with a particle size distribution in a range of 50 mp to 75 mp, a plurality of cellulose fibers with a length in a range of 0.5 mm to 4.0 mm, and Portland cement with a particle size distribution in a range of 53 mp to 75 mp;5wt% to 10wt% silica aerogel;5wt% to 10wt% of metakaolin;4wt% to 10wt% ethylene vinyl acetate; and10wt% to 40wt% of white cement, wherein all percentages by weight are based on a total weight of the dry putty powder,wherein a putty drying time obtained by the dry putty powder is in a range of 10 minutes to 15 minutes after coating on a substrate.

2. The dry putty powder comprising:a fiber cement sheet waste;silica aerogel;metakaolin;ethylene vinyl acetate; andwhite cement.

3. The dry putty powder of claim 2, wherein the fiber cement sheet waste is a fiber cement sheet dust.Ref- 1402-02-77014. The dry putty powder of claim 2, wherein the fiber cement sheet waste comprises a silicon compound, a plurality of cellulose fibers, and Portland cement.

5. The dry putty powder of claim 4, wherein the silicon compound is silicon dioxide.

6. The dry putty powder of claim 2, wherein the fiber cement sheet waste comprise a fiber cement sheet dust comprising silica with a particle size distribution in a range of 50 mp to 75 mp, a plurality of cellulose fibers with a length in a range of 0.5 mm to 4.0 mm, and Portland cement with a particle size distribution in a range of 53 mp to 75 mp.

7. The dry putty of claim 6, wherein the fiber cement sheet dust comprises 40wt% to 45%wt% silica, 10wt% to 15%wt cellulose fibers, and 40wt% to 60%wt Portland cement in accordance with a total weight of the fiber cement sheet dust.

8. The dry powder of claim 7, wherein an average particle size of the fiber cement sheet dust is less than 75 mp, more particularly in a range of 50 mp to 75 mp.

9. The dry powder of claim 2 or 4, wherein a fiber cement sheet waste content is in a range of 45wt% to 50wt% in accordance with a total weight of the dry putty powder.

10. The dry putty powder of claim 2, wherein a silica aerogel content is in a range of 5wt% to 10wt% in accordance with a total weight of the dry putty powder.

11. The dry putty powder of claim 2, wherein a metakaolin content is in a range of 5wt% to 10wt% in accordance with a total weight of the dry putty powder.

12. The dry putty powder of claim 2, wherein an ethylene-vinyl acetate content is in a range of 4wt% to 10wt% in accordance with a total weight of the dry putty powder.

13. The dry putty powder of claim 2, wherein a white cement content is in range of 10wt% to 40wt% in accordance with a total weight of the dry putty powder.Ref- 1402-02-770114. The dry putty powder of any one of claims 1 to 13, wherein an average particle size of the dry putty powder is less than 75 mp, more particularly in a range of 50 mp to 75 mp.

15. The dry putty powder of any one of claims 1 to 14, further comprising a pigment wherein a pigment content is in a range of 3%wt to 5%wt in accordance with a total weigh to the dry putty powder16. A fast-drying putty obtainable by adding a water to a dry putty powder of any one of claim 1 to 15, wherein a weight ratio of water to the dry putty powder is 1: 1, 2: 1, or 3: 1.

17. The putty of claim 16, wherein a putty drying time is in a range of 10 minutes to 15 minutes after coating on a substrate.

19. The fast-drying putty of claim 16, wherein a putty adhesion strength is more than 1.5 MPa, more particularly in a range of 1.5 MPa to 3.0 MPa.

20. The fast-drying putty of claim 16, wherein a water retention capacity of the putty is 99%.

21. The fast-drying putty of claim 16, wherein a putty pendulum hardness is 145 seconds.

22. The fast-drying putty of claim 16, wherein a pH of the putty is in a range of 10 to 12.

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