CN113248192A - Recycled fine aggregate wet-mixed mortar and preparation method thereof - Google Patents
Recycled fine aggregate wet-mixed mortar and preparation method thereof Download PDFInfo
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- CN113248192A CN113248192A CN202110739961.4A CN202110739961A CN113248192A CN 113248192 A CN113248192 A CN 113248192A CN 202110739961 A CN202110739961 A CN 202110739961A CN 113248192 A CN113248192 A CN 113248192A
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- fine aggregate
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 122
- 238000002360 preparation method Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004033 plastic Substances 0.000 claims abstract description 24
- 239000003381 stabilizer Substances 0.000 claims abstract description 24
- -1 polypropylene Polymers 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 12
- 239000004743 Polypropylene Substances 0.000 claims abstract description 12
- 239000004917 carbon fiber Substances 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920001155 polypropylene Polymers 0.000 claims abstract description 12
- 239000012615 aggregate Substances 0.000 claims description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 18
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 18
- 229930006000 Sucrose Natural products 0.000 claims description 18
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 11
- BAERPNBPLZWCES-UHFFFAOYSA-N (2-hydroxy-1-phosphonoethyl)phosphonic acid Chemical compound OCC(P(O)(O)=O)P(O)(O)=O BAERPNBPLZWCES-UHFFFAOYSA-N 0.000 claims description 9
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 9
- 108010020346 Polyglutamic Acid Proteins 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 9
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 9
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 9
- 229920002643 polyglutamic acid Polymers 0.000 claims description 9
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 9
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 9
- 239000005720 sucrose Substances 0.000 claims description 9
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 8
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 8
- 229960003237 betaine Drugs 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 3
- PHTQWCKDNZKARW-UHFFFAOYSA-N isoamylol Chemical compound CC(C)CCO PHTQWCKDNZKARW-UHFFFAOYSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 abstract description 7
- 230000000996 additive effect Effects 0.000 abstract description 6
- 239000002910 solid waste Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- QVDTXNVYSHVCGW-ONEGZZNKSA-N isopentenol Chemical compound CC(C)\C=C\O QVDTXNVYSHVCGW-ONEGZZNKSA-N 0.000 description 7
- UEIPQWHMZNTISW-UHFFFAOYSA-N CC(OP(O)(O1)=O)OP1(OC(O)=O)=O Chemical compound CC(OP(O)(O1)=O)OP1(OC(O)=O)=O UEIPQWHMZNTISW-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a recycled fine aggregate wet-mixed mortar and a preparation method thereof, wherein the wet-mixed mortar comprises the following components in parts by weight: 8-10 parts of cement, 3-4 parts of fly ash, 75-78 parts of recycled fine aggregate, 0.3-0.5 part of a plastic stabilizer for recycled fine aggregate mortar, 5-15 parts of ceramic powder, 0.45-0.55 part of a mortar regulator, 10-11 parts of water, 0.4-0.8 part of polypropylene fiber and 0.2-0.4 part of carbon fiber, wherein the particle size of the recycled fine aggregate is less than 3.5mm, and the fineness modulus is 2.1-2.3; by adopting the special production process of the recycled fine aggregate and the additive for the recycled fine aggregate wet-mixed mortar, the invention can ensure that the working performance of the recycled fine aggregate wet-mixed mortar is good and the technical indexes such as strength, shrinkage and the like meet the requirements of related standards, reduce the risks of cracking and hollowing of the mortar, improve the utilization rate of the building solid waste and the waste concrete and greatly save resources.
Description
Technical Field
The invention belongs to the technical field of wet-mixed mortar, and particularly relates to recycled fine aggregate wet-mixed mortar and a preparation method thereof.
Background
With the development of the building industry, the ready-mixed mortar is well popularized and used, the ready-mixed mortar comprises dry-mixed mortar and wet-mixed mortar, the dry-mixed mortar is prepared by uniformly mixing dried fine aggregate, a cementing material and a powder additive according to a certain proportion, transporting the mixture to a specified place and then adding water for stirring, and the wet-mixed mortar is similar to commercial concrete, needs to be mixed into a finished product at a stirring station, then is transported to a specified storage container, and can be directly taken and used when needed. Compared with dry-mixed mortar, the wet-mixed mortar can ensure stable quality, avoids secondary stirring and noise and dust pollution of construction sites, has more leeway for selecting materials, saves drying cost, has stable quality, long open time and lower overall cost compared with dry-mixed mortar, and is more and more favored by construction enterprises. Generally, wet-mixed mortar consists of cement, fly ash, natural sand, an additive and water, wherein sand accounts for a relatively large proportion in the mortar, and has great influence on the working performance and strength of the wet-mixed mortar, but with the acceleration of the urbanization process in recent years, the high-quality river sand resource is gradually in short supply, and the search for a substitute material of fine aggregate river sand is urgent.
The recycled fine aggregate is produced by using building solid waste and waste concrete and using a sand making machine, compared with natural sand, the recycled fine aggregate has irregular appearance, more edges and corners and high water absorption rate, so that the mortar has poor water retention, high powder and mud content and high adsorption capacity to additives, thereby influencing the working performance and strength of the mortar and increasing the risks of cracking and hollowing of the mortar.
Disclosure of Invention
The invention aims to provide a recycled fine aggregate wet-mixed mortar and a preparation method thereof, and aims to solve the problems that the recycled fine aggregate is produced by adopting building solid waste and waste concrete and using a sand making machine, and compared with natural sand, the recycled fine aggregate has irregular appearance, more edges and corners and large water absorption rate, so that the mortar has poor water retention property and large powder and mud content, and the working performance and strength of the mortar are influenced due to large adsorption capacity of an additive, and the risk of cracking and hollowing of the mortar is increased.
In order to achieve the purpose, the invention provides the following technical scheme: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 8-10 parts of cement, 3-4 parts of fly ash, 75-78 parts of recycled fine aggregate, 0.3-0.5 part of plastic stabilizer for recycled fine aggregate mortar, 5-15 parts of ceramic powder, 0.45-0.55 part of mortar regulator and 10-11 parts of water.
Preferably, 0.4 to 0.8 part of polypropylene fiber and 0.2 to 0.4 part of carbon fiber
Preferably, the particle size of the recycled fine aggregate is less than 3.5mm, and the fineness modulus is 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isoamylol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate and water.
Preferably, the plastic stabilizer for recycled fine aggregate mortar further comprises: hydroxyethylidene diphosphonic acid, sucrose, maleimidoalkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate and water.
Preferably, the mortar conditioner further comprises HEDP and sodium tripolyphosphate.
A preparation method of recycled fine aggregate wet-mixed mortar comprises the following steps:
a. performing secondary ball milling on the recycled fine aggregate through a sand making machine to obtain particles without edges and corners;
b. putting the weighed recycled fine aggregate, cement, fly ash, ceramic powder, polypropylene fiber and carbon fiber into a stirrer, and stirring for 15-20 s to obtain a dry mortar mixture;
c. mixing the weighed plastic stabilizer and mortar regulator for the recycled fine aggregate mortar with 60-70% of water, pouring the mixture into the dry mortar mixture obtained in the step b, and stirring for 15-20 s to obtain a mixture;
d. and c, adding the rest water into the mixture obtained in the step c, and stirring for 15-20 s to obtain uniform wet-mixed mortar.
Preferably, the plastic stabilizer and the mortar conditioner in the step c are mixed with 65% of water and stirred for 15 s.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the special production process of the recycled fine aggregate and the additive for the recycled fine aggregate wet-mixed mortar, the invention can ensure that the working performance of the recycled fine aggregate wet-mixed mortar is good and the technical indexes such as strength, shrinkage and the like meet the requirements of related standards, reduce the risks of cracking and hollowing of the mortar, improve the utilization rate of the building solid waste and the waste concrete and greatly save resources.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 8 parts of cement, 3 parts of fly ash, 75 parts of recycled fine aggregate, 0.30 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.45 part of mortar regulator, 10 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
A preparation method of recycled fine aggregate wet-mixed mortar comprises the following steps:
step 1: carrying out secondary ball milling on the recycled fine aggregate through a sand making machine to obtain particles without edges and corners
Step 2: putting the precisely weighed recycled fine aggregate, cement, fly ash, ceramic powder, polypropylene fiber and carbon fiber into a stirrer for mixing and stirring 15 to obtain a dry mortar mixture;
and step 3: mixing the accurately weighed plastic stabilizer and mortar regulator for the recycled fine aggregate mortar with 65% of water, pouring the mixture into the dry mortar mixture obtained in the step 1, and stirring for 15s to obtain a mixture;
and 4, step 4: and (4) adding the rest water into the mixture obtained in the step (3), and stirring for 15s to obtain uniform wet-mixed mortar.
Example 2:
the invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 8 parts of cement, 4 parts of fly ash, 76 parts of recycled fine aggregate, 0.30 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.45 part of mortar regulator, 11 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
Example 2 the procedure was the same as in example 1.
Example 3:
the invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 9 parts of cement, 3 parts of fly ash, 77 parts of recycled fine aggregate, 0.40 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.45 part of mortar regulator, 10 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
Example 3 the procedure was the same as in example 2.
Example 4:
the invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 9 parts of cement, 4 parts of fly ash, 77 parts of recycled fine aggregate, 0.4 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.55 part of mortar regulator, 11 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
Example 4 the procedure was the same as in example 3.
Example 5:
the invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 10 parts of cement, 3 parts of fly ash, 78 parts of recycled fine aggregate, 0.50 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.55 part of mortar regulator, 10 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
Example 5 the procedure was the same as in example 4.
Example 6:
the invention provides a technical scheme that: the recycled fine aggregate wet-mixed mortar comprises the following components in parts by weight: 10 parts of cement, 4 parts of fly ash, 78 parts of recycled fine aggregate, 0.50 part of plastic stabilizer for recycled fine aggregate mortar, 5 parts of ceramic powder, 0.55 part of mortar regulator, 11 parts of water, 0.5 part of polypropylene fiber, 0.2 part of carbon fiber, and the recycled fine aggregate with the particle size of less than 3.5mm and the fineness modulus of 2.1-2.3.
Preferably, the plastic stabilizer for recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, water, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
Preferably, the mortar regulator comprises white sugar, sodium tripolyphosphate, HEDP (carboxy ethylidene diphosphate), sodium tripolyphosphate and water.
Example 6 the procedure was the same as in example 5.
The performance data of the recycled fine aggregate wet-mixed mortar of the examples 1 to 6 are detected according to the national standard GBT25181-2019 pre-mixed mortar and the industrial standard JGJ/T70-2009 building mortar basic performance test method standard, and are shown as the first table:
watch 1
Data for table one show: various performance indexes of the recycled fine aggregate wet-mixed mortar meet the technical requirements of national standard GBT25181-2019 'ready-mixed mortar', so that the recycled fine aggregate wet-mixed mortar not only provides a wet-mixed mortar product with excellent quality and good working performance for construction engineering projects, but also can reduce the land occupation of building solid wastes and waste concrete.
The total stirring time of the wet-mixed mortar is 45-60 s, the adopted fly ash is II-grade fly ash for construction engineering, the particle size of the regenerated fine aggregate is less than 3.5mm, the fineness modulus is 2.1-2.3, the plasticizer for the regenerated fine aggregate mortar is composed of hydroxymethyl cellulose ether, isopentenol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate, hydroxyethylidene diphosphonic acid, sucrose, maleimide alkyl acid, polyglutamic acid and octadecyl di-mortar regulator which is composed of white sugar, HEDP5, sodium gluconate, sodium tripolyphosphate and water, the mortar coagulation time can be properly delayed, the plasticity of the mortar is prolonged under the combined action of the plasticizer for the regenerated fine aggregate mortar, the service life is prolonged, and the good working performance and the good strength of the regenerated fine aggregate wet-mixed mortar can be ensured by adopting a special regenerated fine aggregate production process and an additive for the regenerated fine aggregate wet-mixed mortar, The technical indexes such as shrinkage rate and the like meet the requirements of related standards, the risks of mortar cracking and hollowing are reduced, the utilization rate of building solid waste and waste concrete can be improved, and resources are greatly saved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The recycled fine aggregate wet-mixed mortar is characterized in that: the wet-mixed mortar comprises the following components in parts by weight: 8-10 parts of cement, 3-4 parts of fly ash, 75-78 parts of recycled fine aggregate, 0.3-0.5 part of plastic stabilizer for recycled fine aggregate mortar, 5-15 parts of ceramic powder, 0.45-0.55 part of mortar regulator and 10-11 parts of water.
2. The recycled fine aggregate wet-mixed mortar of claim 1, wherein: the wet-mixed mortar further comprises the following components in parts by weight: 0.4-0.8 part of polypropylene fiber and 0.2-0.4 part of carbon fiber.
3. The recycled fine aggregate wet-mixed mortar of claim 1, wherein: the particle size of the recycled fine aggregate is less than 3.5mm, and the fineness modulus is 2.1-2.3.
4. The recycled fine aggregate wet-mixed mortar of claim 1, wherein: the plastic stabilizer for the recycled fine aggregate mortar comprises: hydroxymethyl cellulose ether, isoamylol polyoxyethylene ether, unsaturated carboxylic acid, hydroxypropyl acrylate and water.
5. The recycled fine aggregate wet-mixed mortar of claim 4, wherein: the plastic stabilizer for the recycled fine aggregate mortar also comprises: hydroxyethylidene diphosphonic acid, sucrose, maleimidoalkyl acid, polyglutamic acid and octadecyl dihydroxyethyl betaine.
6. The recycled fine aggregate wet-mixed mortar of claim 1, wherein: the mortar regulator comprises white sugar, sodium tripolyphosphate and water.
7. The recycled fine aggregate wet-mixed mortar of claim 6, wherein: the mortar regulator also comprises HEDP and sodium tripolyphosphate.
8. The method for preparing a recycled fine aggregate wet-mixed mortar according to any one of claims 1 to 7, wherein: the method comprises the following steps:
a. performing secondary ball milling on the recycled fine aggregate through a sand making machine to obtain particles without edges and corners;
b. putting the weighed recycled fine aggregate, cement, fly ash, ceramic powder, polypropylene fiber and carbon fiber into a stirrer, and stirring for 15-20 s to obtain a dry mortar mixture;
c. mixing the weighed plastic stabilizer and mortar regulator for the recycled fine aggregate mortar with 60-70% of water, pouring the mixture into the dry mortar mixture obtained in the step b, and stirring for 15-20 s to obtain a mixture;
d. and c, adding the rest water into the mixture obtained in the step c, and stirring for 15-20 s to obtain uniform wet-mixed mortar.
9. The method for preparing recycled fine aggregate wet-mixed mortar according to claim 8, wherein the method comprises the following steps: and c, mixing the plastic stabilizer and the mortar regulator with 65% of water, and stirring for 15 s.
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| CN105948653A (en) * | 2016-05-10 | 2016-09-21 | 厦门天润锦龙建材有限公司 | Recycled wet-mixed mortar and preparation method thereof |
| CN110117173A (en) * | 2019-04-30 | 2019-08-13 | 中建材中岩科技有限公司 | A kind of mixed sand wet mixing mortar and preparation method thereof |
| CN111187026A (en) * | 2020-01-14 | 2020-05-22 | 云南森博混凝土外加剂有限公司 | Machine-made sand wet-mixed mortar additive and preparation method thereof |
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2021
- 2021-06-30 CN CN202110739961.4A patent/CN113248192A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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