CN116768566A - Premixed plastering mortar made of waste glass fiber reinforced plastics and preparation method thereof - Google Patents
Premixed plastering mortar made of waste glass fiber reinforced plastics and preparation method thereof Download PDFInfo
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- CN116768566A CN116768566A CN202310691513.0A CN202310691513A CN116768566A CN 116768566 A CN116768566 A CN 116768566A CN 202310691513 A CN202310691513 A CN 202310691513A CN 116768566 A CN116768566 A CN 116768566A
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- glass fiber
- fiber reinforced
- waste glass
- reinforced plastic
- plastering mortar
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- 239000011152 fibreglass Substances 0.000 title claims abstract description 223
- 239000002699 waste material Substances 0.000 title claims abstract description 201
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 101
- 239000000843 powder Substances 0.000 claims abstract description 85
- 239000002245 particle Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000004576 sand Substances 0.000 claims abstract description 38
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 35
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 239000004816 latex Substances 0.000 claims abstract description 21
- 229920000126 latex Polymers 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 15
- 239000011707 mineral Substances 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000006378 damage Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000004014 plasticizer Substances 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 230000018109 developmental process Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005007 epoxy-phenolic resin Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 235000021190 leftovers Nutrition 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions 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
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a waste glass fiber reinforced plastic premixed plastering mortar and a preparation method thereof, wherein the plastering mortar comprises ordinary Portland cement, fly ash, mineral powder, a water reducing agent, water and a waste glass fiber reinforced plastic reclaimed material, and the waste glass fiber reinforced plastic reclaimed material comprises waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers. The invention uses the waste glass fiber reinforced plastic reclaimed materials to replace latex powder, polyvinyl alcohol fiber and natural sand in the plastering mortar formula in the prior art completely or partially, instead of adding the waste glass fiber reinforced plastic reclaimed materials as a new component into the plastering mortar formula, compared with the technology of directly adding the waste glass fiber reinforced plastic into the formula in the prior art, the invention can greatly reduce the use proportion of natural materials and chemicals in the plastering mortar formula in the prior art, can consume a large amount of waste glass fiber reinforced plastic, has more cost advantage, and satisfies the national sustainable development strategy and double carbon strategy while recycling the waste glass fiber reinforced plastic.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a ready-mixed plastering mortar made of waste glass fiber reinforced plastics and a preparation method thereof.
Background
Glass fiber reinforced plastics, referred to as FRP, fiber reinforced plastics, generally refer to reinforced plastics with glass fibers reinforced with an unsaturated polyester, epoxy resin and phenolic resin matrix, with glass fibers or products thereof as reinforcing materials, referred to as glass fiber reinforced plastics, or referred to as glass fiber reinforced plastics, unlike toughened glass.
Over the past few decades, there has been an increase in the yield and consumption of glass fibre reinforced plastics in the fields of construction, automotive and aeronautics, etc. Glass fiber reinforced plastic has the advantages of easy installation, low maintenance cost, corrosion resistance and the like, but continuous production and use of glass fiber reinforced plastic generates a large amount of glass fiber reinforced plastic waste, and the recyclability of production waste and scrapped products becomes an important and alarming problem.
In recent years, glass fiber reinforced plastic storage tanks and pipelines of large factories gradually approach the design life, and waste glass fiber reinforced plastic is continuously generated. The waste glass fiber reinforced plastic is used as industrial solid waste to be treated safely and environmentally. Due to the lack of a resource utilization way, the temporary storage is only available at present, so that a large amount of space is occupied, and the temporary storage is also a waste of resources. At the same time, the demand for ready-mixed mortar in modern building construction is increasing. In view of the common problems faced by the two, on one hand, the high price of raw materials and the high preparation cost of the ready mixed mortar seriously affect the wide application of the ready mixed mortar, and the search for cheap raw materials for preparing the ready mixed mortar is one of the keys for solving the cost problem of the ready mixed mortar. On the other hand, with the development of the market for glass fiber reinforced plastic products, the production of glass fiber reinforced plastic products leads to the discharge of a large amount of glass fiber reinforced plastic waste. The glass fiber reinforced plastic waste is difficult to treat, and the development of the glass fiber reinforced plastic composite industry is restricted by the underdeveloped recycling technology.
Along with the acceleration of the urban development process of China and the rapid promotion of new rural town construction, the building industry is also vigorously developed, and the use amount of masonry mortar and plastering mortar in the building material field is increasingly increased. However, the production and management of the existing building mortar are mostly extensive, and the huge waste of resources and energy sources seriously reduces the reserve amounts of natural raw materials, latex powder and aggregates, which can influence the development speed of the building industry in China. Therefore, the search for suitable, partial or complete replacement of natural aggregate for preparing building mortar has become one of the problems to be solved in the building material field. The development of the Chinese building industry has been in history for many years, the number of house construction is increased year by year, the use amount of various novel wall materials is also increased day by day, and the requirements of people on the functions of the materials are also higher. Thus, new requirements are also placed on the required mortar properties. The traditional mortar has fewer types, the quality of the product in the production process can not be ensured, and the performance can not completely meet the requirements of modern houses and other factors, so that the use of the traditional mortar has potential safety hazards. The common ready-mixed mortar can meet the requirements of modern buildings more ideally, and the production technology is more mature through the experimental application of partial cities in China. However, the difference between the domestic common ready mixed mortar level and developed countries is still large, so that the research on the common ready mixed mortar is increased and popularized.
Glass reinforced plastic composites are widely used in many industries due to their excellent mechanical and durability properties. This means that the amount of glass fibre reinforced plastic waste produced during production, processing and retirement is increasing and needs to be treated in time. Common glass reinforced plastic composites are often thermoset, non-biodegradable, and pose a significant environmental threat if not properly handled at the end of their useful life.
In view of the fact that the waste glass fiber reinforced plastic after physical crushing mainly comprises powder and short fibers, the waste glass fiber reinforced plastic powder and the short fibers are added into mortar as an aggregate, a large amount of waste glass fiber reinforced plastic can be consumed, the comprehensive performance of the ready-mixed mortar is expected to be enhanced, the cost advantage is further achieved, and a new way for recycling the glass fiber reinforced plastic waste is explored. Solves the problem that glass fiber reinforced plastic is difficult to comprehensively utilize, provides technical support for preparing high-performance ready-mixed mortar at low cost, and provides a new direction for the resource application of the glass fiber reinforced plastic.
CN 106478019A discloses an adhesive mortar reinforced by waste glass fiber reinforced plastics, which comprises the following components in parts by weight: 100 parts of cement, 194-291 parts of river sand, 6-9 parts of waste glass fiber reinforced plastic powder, 2-6 parts of modified epoxy natural rubber, 0.61-0.83 part of water-retaining agent and 3-12 parts of waste glass fiber reinforced plastic fiber, and the technical scheme is defined by the following steps: the waste glass fiber reinforced plastic powder is obtained by crushing, dedusting and collecting thermosetting waste glass fiber reinforced plastic, and the length is less than or equal to 1mm or 1-3 mm. Therefore, although the technical scheme discloses that the waste glass fiber reinforced plastic can be applied to the preparation of the adhesive mortar, the waste glass fiber reinforced plastic powder with the length less than or equal to 1mm or 1-3 mm is required to be used, the requirements on the treatment process of most waste glass fiber reinforced plastic are higher, and the treatment difficulty of the process is increased in an intangible way. In addition, special modified epoxy natural rubber is needed, and the manufacturing cost of the adhesive mortar is not reduced.
CN 115626793A discloses a mortar additive containing waste glass fiber reinforced plastic powder and a preparation method thereof, which is characterized by comprising the following raw materials in percentage by weight: 1-8% of cellulose ether, 1-9% of retarder, 2-3% of lubricant, 3-7% of air entraining agent and 40-80% of glass fiber reinforced plastic powder. The technical scheme specifically discloses that the glass fiber reinforced plastic powder is obtained by cleaning, manually crushing and screening collected glass fiber reinforced plastic leftovers and glass fiber reinforced plastic wastes, the particle size of the glass fiber reinforced plastic powder is 0-0.3mm, and the glass fiber reinforced plastic powder can only be used, so that the processing difficulty of the process is increased if glass fiber reinforced plastic fibers are made into powder again. And in the examples, a mortar volume weight of 1750kg/m is disclosed 3 The compressive strength in 7 days is 5.3MPa, the flexural strength is 2.5MPa,mortar fluidity 21.4%. Therefore, the technical scheme recycles the waste glass fiber reinforced plastics, but the compressive strength and the flexural strength of the prepared mortar are lower, and the performance requirements of the building mortar cannot be met.
CN 106478019A discloses a regenerated glass fiber reinforced plastic anti-cracking thermal insulation mortar and preparation and construction methods thereof, wherein the mortar raw materials are divided into three groups according to parts by weight, the first group comprises 0.64-0.96 part of cement, 0.16-0.24 part of regenerated glass fiber reinforced plastic powder, 0.08-0.12 part of mineral powder, 0.16-0.24 part of fly ash, 0.064-0.096 part of alkali aggregate inhibitor, 0.002-0.003 part of cellulose ether, 1.44-2.16 parts of river sand and 0.256-0.384 part of water; the second group is cement 0.8-1.2 weight portions, lightweight aggregate 0.064-0.096 weight portions, regenerated glass fiber reinforced plastic particles 0.064-0.096 weight portions and water 0.8-1.2 weight portions; the third group is cement 0.8-1.2 parts, regenerated glass fiber reinforced plastic fiber 0.04-0.06 parts, dispersant 0.04-0.06 parts, polyvinyl alcohol powder 0.008-0.012 parts, river sand 0.8-1.2 parts, water reducer 0.004-0.006 parts and water 0.32-0.48 parts; the three groups of raw materials are respectively prepared into an adhesive layer, an insulating layer and an anti-cracking layer. However, the technical proposal can only independently apply the glass fiber reinforced plastic powder, the fiber and the particle in the process for preparing the mortar, and the mortar component also uses more additive components such as lightweight aggregate, alkali aggregate inhibitor, polyvinyl alcohol powder, dispersing agent and the like, and the performance parameters of each component are definitely limited, and the method does not replace the functions of the components, increases the treatment difficulty and the limitation of the regeneration process and does not reduce the treatment cost.
Based on the above-mentioned prior art, there is a technical problem in the prior art that the waste glass fiber reinforced plastics cannot be fully recycled.
Disclosure of Invention
In order to solve the technical problems, the invention utilizes the waste glass fiber reinforced plastics to fully or partially replace latex powder, polyvinyl alcohol fiber (PVA fiber) and natural sand in the plastering mortar formula in the prior art, reduces the use proportion of the latex powder, the polyvinyl alcohol fiber (PVA fiber) and the natural sand in the plastering mortar formula in the prior art, fully recycles the waste glass fiber reinforced plastics and meets the national sustainable development strategy and the double carbon strategy at the same time, namely the invention provides the pre-mixed plastering mortar made of the waste glass fiber reinforced plastics, the plastering mortar comprises the components of common silicate cement, fly ash, mineral powder, a water reducer, water and waste glass fiber reinforced plastics reclaimed materials, the waste glass fiber reinforced plastics reclaimed materials comprise waste glass fiber reinforced plastics particles, waste glass fiber reinforced plastics powder and waste glass fiber reinforced plastics reclaimed materials,
wherein the volume weight of the waste glass fiber reinforced plastic pre-mixed plastering mortar is 1.2-2.0kg/m 3 The adhesive strength is 0.9-1.3Mpa in 28 days, the compressive strength is 30-50MPa in 28 days, the flexural strength is 5-8MPa in 28 days, and the fluidity index expansion value is 10-20cm.
Further, the plastering mortar comprises the following components in percentage by mass:
100 parts of ordinary Portland cement; 30-50 parts of fly ash; 30-50 parts of mineral powder; 6-8 parts of water reducer; 40-70 parts of water; 53-115 parts of waste glass fiber reinforced plastic reclaimed materials, wherein 50-100 parts of waste glass fiber reinforced plastic particles, 2-10 parts of waste glass fiber reinforced plastic powder and 1-5 parts of waste glass fiber reinforced plastic fibers.
Further, the plastering mortar also comprises the following components in percentage by mass: 0-8 parts of latex powder, 1.5-4 parts of PVA fiber and 150-230 parts of natural sand.
Further, the waste glass fiber reinforced plastic particles are used for replacing natural sand with equal mass, and the replaced mass accounts for 20-50% of the mass of the whole natural sand;
the waste glass fiber reinforced plastic powder is used for replacing the latex powder with equal mass, and the replaced mass accounts for 25-100% of the mass of the whole latex powder;
the waste glass fiber reinforced plastic fibers are used for replacing PVA fibers with equal mass, and the replaced mass accounts for 20-50% of the mass of the whole PVA fibers;
the waste glass fiber reinforced plastic reclaimed material is used for reducing the use proportion of natural sand, latex powder and PVA fiber in the plastering slurry formula in the prior art.
Further, the particle size of the waste glass fiber reinforced plastic particles is 1.18-0.25mm, and the density is 0.9-1.5g/cm 3 The fineness modulus is 1.9-3.2;
the particle size of the waste glass fiber reinforced plastic powder is 100-400 meshes;
the waste glass fiber reinforced plastic fibers are in a fiber bundle shape, the diameters of the waste glass fiber reinforced plastic fibers are 0.5-0.8mm, the lengths of the waste glass fiber reinforced plastic fibers are 11-15mm, and the long fiber ratio is 15-25.
The invention also provides a preparation method of the waste glass fiber reinforced plastic ready-mixed plastering mortar, which comprises the following steps:
s1: the waste glass fiber reinforced plastic reclaimed materials are crushed, then are reclaimed and screened, and are subjected to cutting, crushing and screening according to the destruction mechanism of waste glass fiber reinforced plastic materials to respectively obtain waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers;
s2: weighing the components in the plastering mortar according to the mass ratio, mixing the components except the water and the water reducing agent together, and uniformly stirring at normal temperature to obtain a mixture A; mixing water and a water reducing agent to obtain a mixture B, wherein the plastering mortar comprises one or more of ordinary Portland cement, fly ash, mineral powder, a water reducing agent, water, a waste glass fiber reinforced plastic reclaimed material, latex powder, PVA fibers and natural sand;
s3: adding the mixture B into the mixture A, and stirring at normal temperature to obtain a mixture C;
s4: and vibrating the mixture C, and obtaining the plastering mortar after the vibration is finished.
Further, in the step S1, the waste glass fiber reinforced plastic reclaimed material is waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers are respectively obtained by cutting, crushing and screening the waste glass fiber reinforced plastic through a glass fiber reinforced plastic shredder or a hammer crusher, the waste glass fiber reinforced plastic particles and the waste glass fiber reinforced plastic powder are screened through different particle sizes, and the waste glass fiber reinforced plastic fibers are fibers positioned above a screen after the waste glass fiber reinforced plastic particles and the waste glass fiber reinforced plastic powder are screened;
wherein the particle size of the waste glass fiber reinforced plastic particles is 1.18-0.25mm, and the density is 0.9-1.5g/cm 3 The fineness modulus is 1.9-3.2;
the particle size of the waste glass fiber reinforced plastic powder is 100-400 meshes;
the waste glass fiber reinforced plastic fibers are in a fiber bundle shape, the diameters of the waste glass fiber reinforced plastic fibers are 0.5-0.8mm, the lengths of the waste glass fiber reinforced plastic fibers are 11-15mm, and the long fiber ratio is 15-25.
Further, the plastering mortar further comprises one or more of mortar plastic regulator and cellulose ether water-retaining agent.
Further, in the step S2, the ordinary portland cement is general cement, and the code is PO; the fly ash is class II fly ash; the mineral powder is S95 grade mineral powder; the water reducer is a polycarboxylate water reducer; the emulsion powder is redispersible emulsion powder; the PVA fibers are polyvinyl alcohol fibers; the natural sand is one or more of river sand, lake sand, sea sand and mountain sand.
Further, the water reducing rate of the water reducing agent is 20%.
Further, the operation method of stirring and vibrating in the steps S3 and S4 is the same as the operation method of stirring and vibrating in the cement mortar strength test method ISO method (GB/T17671-2021).
The invention has the beneficial effects that:
1. the invention uses the recycled waste glass fiber reinforced plastic material to replace the latex powder, polyvinyl alcohol fiber (PVA fiber) and natural sand in the plastering mortar formula in the prior art, rather than adding the recycled waste glass fiber reinforced plastic material as a new component into the plastering mortar formula, thus compared with the technology of directly adding the waste glass fiber reinforced plastic material into the formula in the prior art, the invention can greatly reduce the use proportion of natural materials (natural sand) and chemicals (latex powder and PVA fiber) in the plastering mortar formula in the prior art, consume a large amount of waste glass fiber reinforced plastic, has more cost advantage, and meets the national sustainable development strategy and double carbon strategy while recycling the waste glass fiber reinforced plastic;
2. the waste glass fiber reinforced plastic particles in the waste glass fiber reinforced plastic ready-mixed plastering mortar are used for replacing natural sand with equal mass, and the replaced mass accounts for 20-50% of the mass of the whole natural sand; the waste glass fiber reinforced plastic powder is used for replacing the latex powder with equal mass, and the replaced mass accounts for 25-100% of the mass of the whole latex powder; the waste glass fiber reinforced plastic fiber is used for replacing PVA fiber with equal mass, the replaced mass accounts for 20-50% of the mass of the whole PVA fiber, and the waste glass fiber reinforced plastic particles, the waste glass fiber reinforced plastic powder and the waste glass fiber in the crushed waste glass fiber reinforced plastic reclaimed material are used simultaneously in the same formula, so that the crushing of the waste glass fiber reinforced plastic is shortenedThe process time is saved, the whole process steps are saved, and the volume weight of the finally obtained ready-mixed plastering mortar made of the waste glass fiber reinforced plastic is 1.2-2.0kg/m 3 The plastering mortar disclosed by the invention has the advantages that the original performances of the plastering mortar in the prior art are maintained, and the waste glass fiber reinforced plastic reclaimed materials are used for completely or partially replacing latex powder, polyvinyl alcohol fiber (PVA fiber) and natural sand in the plastering mortar formula in the prior art, so that the cost for preparing the high-performance ready-mixed plastering mortar is greatly reduced;
3. the invention solves the problem that the waste glass fiber reinforced plastic is difficult to comprehensively utilize, provides technical support for preparing the high-performance ready-mixed plastering mortar at low cost, and provides a new direction for the resource application of the waste glass fiber reinforced plastic.
Detailed Description
Example 1
The embodiment provides a preparation method of waste glass fiber reinforced plastic ready-mixed plastering mortar, which comprises the following steps:
s1: the waste glass fiber reinforced plastic reclaimed materials are crushed, then are reclaimed and screened, and are subjected to cutting, crushing and screening according to the destruction mechanism of waste glass fiber reinforced plastic materials to respectively obtain waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers;
s2: weighing the components in the plastering mortar according to the mass ratio, mixing the components except the water and the water reducing agent together, and uniformly stirring at normal temperature to obtain a mixture A; mixing water and a water reducing agent to obtain a mixture B, wherein the plastering mortar comprises the components of ordinary Portland cement, fly ash, mineral powder, the water reducing agent, water, waste glass fiber reinforced plastic reclaimed materials, latex powder, PVA fibers and natural sand;
s3: adding the mixture B into the mixture A, and stirring at normal temperature to obtain a mixture C;
s4: and vibrating the mixture C, and obtaining the plastering mortar after the vibration is finished.
The operation method of stirring and vibrating in the steps S3 and S4 is the same as the operation method of stirring and vibrating in the cement mortar intensity test method ISO method (GB/T17671-2021).
The step S1 is that the waste glass fiber reinforced plastic reclaimed materials are primarily crushed by a glass fiber reinforced plastic shredder to obtain crushed waste glass fiber reinforced plastic reclaimed materials, the crushed waste glass fiber reinforced plastic reclaimed materials are screened by a square-hole screen with the diameter of 1.18-0.25mm to obtain waste glass fiber reinforced plastic particles, the waste glass fiber reinforced plastic powder is screened by a screen with the diameter of 100 (150 mu m) to 400 mu (38 mu m), and the rest is waste glass fiber reinforced plastic fibers;
wherein the particle size of the waste glass fiber reinforced plastic particles is 1.18-0.25mm, and the density is 1.378g/cm 3 The fineness modulus is 2.2,
the particle size of the waste glass fiber reinforced plastic powder is 100-400 meshes;
the waste glass fiber reinforced plastic fibers are in a fiber bundle shape, the diameters of the waste glass fiber reinforced plastic fibers are 0.532-0.735mm, the lengths of the waste glass fiber reinforced plastic fibers are 11.01-13.25mm, and the long fiber ratio is 15.89-22.63;
the specific test is based on the following:
(1) Density calculation of waste glass fiber reinforced plastic particles
Taking 20.0g of waste glass fiber reinforced plastic particles, putting the waste glass fiber reinforced plastic particles into a 100ml measuring cylinder containing 50ml of purified water, and reading the water level scale of 64.5ml in the measuring cylinder when the waste glass fiber reinforced plastic particles are completely precipitated, so that the volume of the weighed waste glass fiber reinforced plastic particles is 14.5cm 3 The density of the waste glass fiber reinforced plastic particles is calculated to be equal to 1.378g/cm according to a density calculation formula rho=m/v 3 。
(2) Calculation of fineness modulus of waste glass fiber reinforced plastic particles
A500 g sample of waste glass fiber reinforced plastic particles is weighed, the waste glass fiber reinforced plastic particles are screened from coarse to fine in sequence by a set of standard sieves with nominal diameters of 5mm, 2.50mm, 1.25mm, 630 mu m, 315 mu m and 160 mu m, the mass mi of the particles on each sieve is weighed according to national standard GB/T14684-2022 building sand, and the fractional screen residue A1, A2, A3, A4, A5, A6 (mi/500) and the accumulated screen residue A1, A2, A3, A4, A5 and A6 on each sieve are calculated. And measuring and calculating the obtained waste glass fiber reinforced plastic particles to obtain the apparent density fineness modulus of the particles which is 2.2.
The fineness modulus calculation formula is as follows: μf= [ (a2+a3+a4+a5+a6) -5A1 ]/(100-A1).
(3) Diameter measurement of waste glass fiber reinforced plastic fibers
10 groups of waste glass fiber reinforced plastic fibers are randomly extracted from the waste glass fiber reinforced plastic fibers to serve as samples, the diameter of each group of waste glass fiber reinforced plastic fibers is measured by using a spiral micrometer, the average value of the diameters is 0.6651mm, and specific measurement results are shown in table 1:
TABLE 1
(4) Fiber length measurement of waste glass fiber reinforced plastic fibers
The fiber length of each group of waste glass fiber reinforced plastic fibers in the sample (3) is measured by a vernier caliper, the average value of the fiber lengths of the waste glass fiber reinforced plastic fibers is calculated to be 12.04mm, and the specific measurement results are shown in table 2:
TABLE 2
(5) Calculation of length-to-fiber ratio of waste glass fiber reinforced plastic fibers
According to the calculation formula of the long fiber ratio of the waste glass fiber reinforced plastic fibers: long fiber ratio = length/diameter, and the results of tables 1 and 2 are combined, the long fiber ratio of each group of waste glass fiber reinforced plastic fibers is calculated, the average value of the long fiber ratio is 18.297, and the specific calculation results are shown in table 3:
TABLE 3 Table 3
In the step S2, the ordinary Portland cement is general cement, and the code number is PO; the fly ash is class II fly ash; the mineral powder is S95 grade mineral powder; the water reducer is a polycarboxylate water reducer, and the water reducing rate is 20%; the emulsion powder is redispersible emulsion powder; the PVA fibers are polyvinyl alcohol fibers; the natural sand is one or more of river sand, lake sand, sea sand and mountain sand.
The operation method of stirring and vibrating in the steps S3 and S4 is the same as the operation method of stirring and vibrating in the cement mortar intensity test method ISO method (GB/T17671-2021).
In this example, the blending ratios of the components of the plastering mortar are shown in table 4.
The performance parameters of the plastering mortar prepared according to the components and the mixing ratio of table 4 are shown in table 5.
Examples 2 to 6
In examples 2 to 6, the preparation method of the waste glass fiber reinforced plastic ready-mixed plastering mortar is the same as that of example 1, and the parameters of the recycled waste glass fiber reinforced plastic are the same as those of example 1, except that the mixing ratio of each component for preparing the plastering mortar is different, the mixing ratio is shown in Table 4, and the performance parameters of the plastering mortar prepared according to the components and the mixing ratio of Table 4 are shown in Table 5.
Comparative example 1
The preparation method of the plastering mortar in this comparative example is the same as in example 1, except that the waste glass fiber reinforced plastic reclaimed material is not used in this comparative example, and the plastering mortar is prepared entirely using the formulation of the prior art, wherein the formulation ratio of each component of the prepared plastering mortar is shown in table 4, and the performance parameters of the plastering mortar prepared according to the components and the formulation ratio of table 4 are shown in table 5.
TABLE 4 mixing ratio (kg/m) 3 )
Wherein examples 1 to 6 use the waste glass fiber reinforced plastic particles for replacing natural sand with equal mass, and the sum of the mixing ratio of the natural sand and the waste glass fiber reinforced plastic particles is 675kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The waste glass fiber reinforced plastic powder is used for replacing emulsion powder with equal mass, and the addition of the mixing ratio of the emulsion powder and the waste glass fiber reinforced plastic powder is 22.5kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The waste glass fiber reinforced plastic fiber is used for replacing PVA fiber with equal mass, and the sum of the mixing ratio of the PVA fiber and the waste glass fiber reinforced plastic fiber is 10kg/m 3 Namely, the waste glass fiber reinforced plastic reclaimed material is used for reducing the use proportion of natural sand, latex powder and PVA fiber in the plastering slurry formula in the prior art.
TABLE 5
In summary, the plastering mortar of the invention uses the recycled waste glass fiber reinforced plastic material to fully or partially replace latex powder, polyvinyl alcohol fiber (PVA fiber) and natural sand in the plastering mortar formula in the prior art on the basis of maintaining the original performance of the plastering mortar in the prior art, can consume a large amount of waste glass fiber reinforced plastic, has more cost advantage, and meets the national sustainable development strategy and double carbon strategy while recycling the waste glass fiber reinforced plastic.
It will be understood that the invention is not limited to what has been shown in the above description, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A ready-mixed plastering mortar made of waste glass fiber reinforced plastics is characterized in that the plastering mortar comprises ordinary Portland cement, fly ash, mineral powder, a water reducing agent, water and a waste glass fiber reinforced plastic reclaimed material, wherein the waste glass fiber reinforced plastic reclaimed material comprises waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers,
wherein the volume weight of the waste glass fiber reinforced plastic pre-mixed plastering mortar is 1.2-2.0kg/m 3 The adhesive strength is 0.9-1.3Mpa in 28 days, the compressive strength is 30-50MPa in 28 days, the flexural strength is 5-8MPa in 28 days, and the fluidity index expansion value is 10-20cm.
2. The ready-mixed plastering mortar made of waste glass fiber reinforced plastics according to claim 1, wherein the plastering mortar comprises the following components in percentage by mass:
100 parts of ordinary Portland cement; 30-50 parts of fly ash; 30-50 parts of mineral powder; 6-8 parts of water reducer; 40-70 parts of water; 53-115 parts of waste glass fiber reinforced plastic reclaimed materials, wherein 50-100 parts of waste glass fiber reinforced plastic particles, 2-10 parts of waste glass fiber reinforced plastic powder and 1-5 parts of waste glass fiber reinforced plastic fibers.
3. The ready-mixed plastering mortar made of waste glass fiber reinforced plastics according to claim 1, wherein the plastering mortar further comprises the following components and corresponding mass proportions: 0-8 parts of latex powder, 1.5-4 parts of PVA fiber and 150-230 parts of natural sand.
4. A ready-mixed plastering mortar made of waste glass fiber reinforced plastics according to claim 3, wherein the waste glass fiber reinforced plastics particles are used for replacing natural sand with equal mass, and the replaced mass accounts for 20-50% of the mass of the whole natural sand;
the waste glass fiber reinforced plastic powder is used for replacing the latex powder with equal mass, and the replaced mass accounts for 25-100% of the mass of the whole latex powder;
the waste glass fiber reinforced plastic fiber is used for replacing PVA fiber with equal mass, and the replaced mass accounts for 20-50% of the mass of the whole PVA fiber.
5. The ready-mixed plastering mortar made of waste glass fiber reinforced plastic according to claim 4, wherein the particle size of the waste glass fiber reinforced plastic particles is 1.18-0.25mm and the density is 0.9-1.5g/cm 3 The fineness modulus is 1.9-3.2;
the particle size of the waste glass fiber reinforced plastic powder is 100-400 meshes;
the waste glass fiber reinforced plastic fibers are in a fiber bundle shape, the diameters of the waste glass fiber reinforced plastic fibers are 0.5-0.8mm, the lengths of the waste glass fiber reinforced plastic fibers are 11-15mm, and the long fiber ratio is 15-25.
6. A method for preparing the ready-mixed plastering mortar made of waste glass fiber reinforced plastics according to any one of claims 1 to 5, comprising the following steps:
s1: the waste glass fiber reinforced plastic reclaimed materials are crushed, then are reclaimed and screened, and are subjected to cutting, crushing and screening according to the destruction mechanism of waste glass fiber reinforced plastic materials to respectively obtain waste glass fiber reinforced plastic particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers;
s2: weighing the components in the plastering mortar according to the mass ratio, mixing the components except the water and the water reducing agent together, and uniformly stirring at normal temperature to obtain a mixture A; mixing water and a water reducing agent to obtain a mixture B, wherein the plastering mortar comprises one or more of ordinary Portland cement, fly ash, mineral powder, a water reducing agent, water, a waste glass fiber reinforced plastic reclaimed material, latex powder, PVA fibers and natural sand;
s3: adding the mixture B into the mixture A, and stirring at normal temperature to obtain a mixture C;
s4: and vibrating the mixture C, and obtaining the plastering mortar after the vibration is finished.
7. The method for preparing the ready-mixed plastering mortar made of the waste glass fiber reinforced plastics according to claim 6, wherein in the step S1, the waste glass fiber reinforced plastics reclaimed materials are waste glass fiber reinforced plastics particles, waste glass fiber reinforced plastic powder and waste glass fiber reinforced plastic fibers which are obtained by cutting, crushing and screening the waste glass fiber reinforced plastics through a glass fiber reinforced plastics shredder or a hammer crusher respectively, the waste glass fiber reinforced plastics particles and the waste glass fiber reinforced plastic powder are screened through the difference of particle sizes, and the waste glass fiber reinforced plastic fibers are fibers positioned above a screen after the waste glass fiber reinforced plastic particles and the waste glass fiber reinforced plastic powder are screened;
wherein the particle size of the waste glass fiber reinforced plastic particles is 1.18-0.25mm, and the density is 0.9-1.5g/cm 3 The fineness modulus is 1.9-3.2;
the particle size of the waste glass fiber reinforced plastic powder is 100-400 meshes;
the waste glass fiber reinforced plastic fibers are in a fiber bundle shape, the diameters of the waste glass fiber reinforced plastic fibers are 0.5-0.8mm, the lengths of the waste glass fiber reinforced plastic fibers are 11-15mm, and the long fiber ratio is 15-25.
8. The method for preparing the ready-mixed plastering mortar made of the waste glass fiber reinforced plastics according to claim 7, wherein the plastering mortar further comprises one or more of a mortar plasticizer and a cellulose ether water-retaining agent.
9. The method for preparing the ready-mixed plastering mortar made of the waste glass fiber reinforced plastics according to claim 6, wherein the ordinary portland cement in the step S2 is general cement, and the code number is PO; the fly ash is class II fly ash; the mineral powder is S95 grade mineral powder; the water reducer is a polycarboxylate water reducer; the emulsion powder is redispersible emulsion powder; the PVA fibers are polyvinyl alcohol fibers; the natural sand is one or more of river sand, lake sand, sea sand and mountain sand.
10. The method for preparing the ready-mixed plastering mortar made of the waste glass fiber reinforced plastic according to claim 9, wherein the water reducing rate of the water reducing agent is 20%.
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