CN114988798A - Masonry mortar prepared from recycled brick aggregate and preparation method thereof - Google Patents
Masonry mortar prepared from recycled brick aggregate and preparation method thereof Download PDFInfo
- Publication number
- CN114988798A CN114988798A CN202210597151.4A CN202210597151A CN114988798A CN 114988798 A CN114988798 A CN 114988798A CN 202210597151 A CN202210597151 A CN 202210597151A CN 114988798 A CN114988798 A CN 114988798A
- Authority
- CN
- China
- Prior art keywords
- recycled brick
- masonry mortar
- raw material
- brick aggregate
- parts
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Links
- 239000011449 brick Substances 0.000 title claims abstract description 70
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 52
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 239000004568 cement Substances 0.000 claims abstract description 27
- 239000004576 sand Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 8
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 8
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 4
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 claims description 2
- 239000011398 Portland cement Substances 0.000 claims description 2
- 229920000609 methyl cellulose Polymers 0.000 claims description 2
- 239000001923 methylcellulose Substances 0.000 claims description 2
- 235000010981 methylcellulose Nutrition 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000004927 clay Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010998 test method 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
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses masonry mortar prepared by using recycled brick aggregate, which is prepared from the following raw materials: 110-200 parts of cement, 0-90 parts of fly ash, 560-720 parts of river sand, 80-240 parts of recycled brick aggregate and 0.1-1 part of water-retaining thickener by mass percent. The preparation method comprises the following steps: uniformly stirring cement, fly ash and river sand, and marking as a raw material A; adding the water-retaining thickener into water, and fully stirring to obtain a raw material B; adding the raw material B into the raw material A, and stirring uniformly to obtain a raw material C; and adding the recycled brick aggregate into the raw material C, and uniformly stirring to obtain the masonry mortar containing the recycled brick aggregate. The masonry mortar prepared by using the recycled brick aggregate can reduce the pollution of the waste clay bricks to the environment, save natural resources and reduce the production cost of the masonry mortar, and meanwhile, the prepared masonry mortar has high water retention rate and compressive strength and has remarkable environmental, economic and social benefits.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to masonry mortar prepared by using recycled brick aggregate and a preparation method thereof.
Background
The masonry mortar is used for masonry of bricks, stones, building blocks and other blocks, plays roles of bonding, padding and force transmission, and is one of main engineering materials in current building construction. River sand is one of important raw materials for preparing masonry mortar, but with the continuous promotion of infrastructure construction, a large amount of river sand resources are rapidly consumed, so that the river sand resources are increasingly scarce, and the sustainable development of the mortar industry is seriously restricted. Therefore, the requirement for the development of green masonry mortar is increasingly urgent by seeking a substitute material for river sand.
With the continuous advance in the urbanization process, the demolition of old buildings generates a great deal of construction waste. About half of the construction waste is waste clay bricks. At present, the treatment of the waste clay bricks is mainly buried, so that not only is the resource utilization not realized, but also a large amount of valuable land resources are occupied, the soil, the water body and the atmosphere are polluted, and the environment is seriously influenced. Therefore, the resource utilization of the waste clay bricks is imperative and urgent.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide masonry mortar prepared by using recycled brick aggregate, solve the problem that river sand resources are increasingly scarce in the existing masonry mortar preparation, and realize resource utilization of waste clay bricks.
The technical scheme is as follows: the masonry mortar prepared by utilizing the recycled brick aggregate comprises the following raw materials in parts by weight: 110-200 parts of cement, 0-90 parts of fly ash, 560-720 parts of river sand, 80-240 parts of recycled brick aggregate and 0.1-1 part of water-retaining thickener.
Further, the cement is ordinary portland cement meeting the requirements of the current standard GB 175.
Further, the fly ash meets the requirements of the current standard GB/T1596.
Furthermore, the fineness modulus of the river sand is 2.3-3.0, the mud content is less than or equal to 2.0%, and the mud block content is less than or equal to 1.0%.
Further, the water-retaining thickener is any one of hydroxypropyl methyl cellulose ether, methyl cellulose ether or hydroxyethyl methyl cellulose ether.
Furthermore, the particle size of the aggregate of the recycled brick is less than 4.75 mm, the fineness modulus is 2.3-3.3, the content of particles smaller than 75 micrometers is less than or equal to 15%, the consistency loss rate of the masonry mortar is too high due to too high micro powder content, and the setting time is too short.
The invention also provides a preparation method of the masonry mortar prepared by utilizing the recycled brick aggregate, which comprises the following steps:
step 1, stirring cement, fly ash and river sand for 1 minute, and marking as a raw material A;
step 2, adding the water-retaining thickener into water, and fully stirring to obtain a raw material B;
step 3, adding the raw material B into the raw material A, and stirring to obtain mortar without recycled brick aggregate, which is marked as a raw material C;
and 4, adding the recycled brick aggregate into the raw material C, and stirring to obtain the masonry mortar containing the recycled brick aggregate.
Further, in the step 3, the stirring time is 2-3 min.
Further, in the step 4, the stirring time is 2-3 min.
The technical principle is as follows: the recycled brick aggregate has porous surface and high water absorption rate, and can improve the water retention rate of the masonry mortar. The micro powder in the recycled brick aggregate has volcanic ash activity and can react with hydration product calcium hydroxide of cement to generate calcium silicate hydrate gel. In addition, the high water absorption of the recycled brick aggregate can also reduce the effective water cement ratio in the cement paste. Thus, the use of recycled brick aggregate enables the microstructure of the cement paste to be optimized. The recycled brick aggregate has a porous surface, and cement paste can enter a gap of the aggregate to enhance an interface transition area between the recycled brick aggregate and the cement paste. Therefore, the recycled brick aggregate with proper mixing amount can improve the water retention rate and the compressive strength of the masonry mortar.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
(1) the waste clay brick is used as the fine aggregate, and the characteristics of porosity and high water absorption of the recycled brick aggregate are utilized, so that the water retention rate of the masonry mortar can be improved.
(2) The recycled brick aggregate is used as the fine aggregate, and the microstructure of cement paste and an interface transition region can be improved by utilizing the porous property, high water absorption and volcanic ash activity of micro powder of the recycled brick aggregate, so that the compressive strength of the masonry mortar is improved.
(3) The recycled brick aggregate is used for partially replacing river sand, so that the consumption of natural resources is reduced, the resource utilization of construction waste is realized, the occupation of land resources and the pollution to the environment are avoided, and the method has good economic benefit and environmental benefit.
(4) The masonry mortar prepared by the invention has excellent performance, the water retention rate and the compressive strength of the masonry mortar are higher than the requirements of GB/T25181-2019 premixed mortar, and other performances also meet the standard requirements.
(5) The masonry mortar prepared by the method is low in production cost and simple in process, can be directly produced as dry-mixed masonry mortar, and is suitable for large-scale popularization and use.
Detailed Description
The technical solution of the present invention is further explained below.
Comparative example 1
The masonry mortar does not contain recycled brick aggregate and has the strength grade of M5, and comprises the following components: 110 portions of cement, 90 portions of fly ash, 800 portions of river sand and 0.16 portion of water-retaining thickener.
Stirring P.O 42.5 cement, secondary fly ash and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; and adding the raw material B into the raw material A, stirring for 4 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar without the recycled brick aggregate.
Comparative example 2
The masonry mortar does not contain recycled brick aggregate and has the strength grade of M10, and comprises the following components: 140 parts of cement, 60 parts of fly ash, 800 parts of river sand and 0.16 part of water-retaining thickener.
Stirring P.O 42.5 cement, secondary fly ash and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; and adding the raw material B into the raw material A, stirring for 4 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar without the recycled brick aggregate.
Comparative example 3
The masonry mortar does not contain recycled brick aggregate and has the strength grade of M20, and comprises the following components: 200 parts of cement, 800 parts of river sand and 0.16 part of water-retaining thickener.
Stirring P.O 42.5 cement and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; and adding the raw material B into the raw material A, stirring for 4 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar without the recycled brick aggregate.
Example 1
The masonry mortar with the strength grade of M5 prepared by utilizing the recycled brick aggregate comprises the following components: 110 parts of cement, 90 parts of fly ash, 560 parts of river sand, 240 parts of recycled brick aggregate and 0.16 part of water-retaining thickener.
Stirring P.O 42.5 cement, secondary fly ash and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; adding the raw material B into the raw material A, and stirring for 2 minutes to obtain mortar without recycled brick aggregates, and marking as a raw material C; and adding the recycled brick aggregate into the raw material C, stirring for 2 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar containing the recycled brick aggregate.
Example 2
The masonry mortar with the strength grade of M10 prepared by utilizing the recycled brick aggregate comprises the following components: 140 parts of cement, 60 parts of fly ash, 560 parts of river sand, 240 parts of recycled brick aggregate and 0.16 part of water-retaining thickener.
Stirring P.O 42.5 cement, secondary fly ash and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; adding the raw material B into the raw material A, and stirring for 2 minutes to obtain mortar without recycled brick aggregates, and marking as a raw material C; and adding the recycled brick aggregate into the raw material C, stirring for 2 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar containing the recycled brick aggregate.
Example 3
The masonry mortar with the strength grade of M20, which is prepared by utilizing recycled brick aggregate, comprises the following components: 200 parts of cement, 560 parts of river sand, 240 parts of recycled brick aggregate and 0.16 part of water-retaining thickener.
Stirring P.O 42.5 cement and river sand with fineness modulus of 2.4 for 1 minute, and marking as a raw material A; adding hydroxypropyl methyl cellulose ether into water, and fully stirring to obtain a raw material B; adding the raw material B into the raw material A, and stirring for 2 minutes to obtain mortar without recycled brick aggregates, and marking as a raw material C; adding the recycled brick aggregate into the raw material C, stirring for 2 minutes, and controlling the consistency of the mortar to be 75 +/-5 mm by adjusting the water consumption to obtain the masonry mortar containing the recycled brick aggregate.
The water retention rate and 28-day compressive strength of the masonry mortar are tested according to the test methods of national standard GB/T25181 and 2019 premixed mortar and industrial standard JGJ/T70-2009 basic performance test method standard of building mortar. The test results are shown in Table 1.
TABLE 1 Water Retention and compressive Strength of masonry mortar
| Sample (I) | Water retention rate/%) | 28 day compressive strength/MPa |
| Comparative example 1 | 88.92 | 8.56 |
| Comparative example 2 | 89.30 | 14.37 |
| Comparative example 3 | 90.55 | 21.05 |
| Example 1 | 89.82 | 11.95 |
| Example 2 | 91.12 | 16.66 |
| Example 3 | 92.65 | 22.49 |
From the test results of comparative example 1 and example 1, comparative example 2 and example 2, and comparative example 3 and example 3, it is known that the use of a recycled brick aggregate instead of a part of river sand can improve the water retention and 28-day compressive strength of the masonry mortar.
Claims (9)
1. The masonry mortar prepared by utilizing the recycled brick aggregate is characterized by comprising the following raw materials in parts by weight: 110-200 parts of cement, 0-90 parts of fly ash, 560-720 parts of river sand, 80-240 parts of recycled brick aggregate and 0.1-1 part of water-retaining thickener.
2. A masonry mortar prepared using recycled brick aggregate according to claim 1, characterized in that said cement is ordinary portland cement meeting the current standard GB 175.
3. The masonry mortar prepared by using recycled brick aggregate according to claim 1, wherein the fly ash is fly ash satisfying the current standard GB/T1596.
4. The masonry mortar prepared by using the recycled brick aggregate according to claim 1, wherein the fineness modulus of the river sand is 2.3-3.0, the mud content is less than or equal to 2.0%, and the mud block content is less than or equal to 1.0%.
5. A masonry mortar prepared using recycled brick aggregate according to claim 1, wherein the water retention thickener is any one of hydroxypropyl methyl cellulose ether, methyl cellulose ether or hydroxyethyl methyl cellulose ether.
6. The masonry mortar prepared by using the recycled brick aggregate according to claim 1, wherein the recycled brick aggregate has a particle size of less than 4.75 mm, a fineness modulus of 2.3-3.3 and a particle content of less than 75 microns of less than or equal to 15%.
7. A method for preparing a masonry mortar prepared using recycled brick aggregate according to claim 1, comprising the steps of:
step 1, stirring cement, fly ash and river sand for 1 minute, and marking as a raw material A;
step 2, adding the water-retaining thickener into water, and fully stirring to obtain a raw material B;
step 3, adding the raw material B into the raw material A, and stirring to obtain mortar without recycled brick aggregates, and marking as a raw material C;
and 4, adding the recycled brick aggregate into the raw material C, and stirring to obtain the masonry mortar containing the recycled brick aggregate.
8. The method for preparing masonry mortar prepared from recycled brick aggregates according to claim 7, wherein in step 3, the stirring time is 2-3 min.
9. The method for preparing masonry mortar using recycled brick aggregate according to claim 7, wherein the stirring time in step 4 is 2-3 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210597151.4A CN114988798A (en) | 2022-05-30 | 2022-05-30 | Masonry mortar prepared from recycled brick aggregate and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210597151.4A CN114988798A (en) | 2022-05-30 | 2022-05-30 | Masonry mortar prepared from recycled brick aggregate and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114988798A true CN114988798A (en) | 2022-09-02 |
Family
ID=83029511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210597151.4A Pending CN114988798A (en) | 2022-05-30 | 2022-05-30 | Masonry mortar prepared from recycled brick aggregate and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114988798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974489A (en) * | 2022-12-30 | 2023-04-18 | 临海市忠信新型建材有限公司 | Masonry mortar with good volume stability |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343160A (en) * | 2007-07-13 | 2009-01-14 | 杨德志 | Concrete regeneration aggregate industrial mortar |
| CN108191352A (en) * | 2018-03-14 | 2018-06-22 | 南京富源资源利用有限公司 | The light masonry mortar prepared using discarded clay brick |
| CN114031340A (en) * | 2021-11-30 | 2022-02-11 | 东南大学 | Plastering mortar containing recycled aggregate of waste clay brick |
-
2022
- 2022-05-30 CN CN202210597151.4A patent/CN114988798A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343160A (en) * | 2007-07-13 | 2009-01-14 | 杨德志 | Concrete regeneration aggregate industrial mortar |
| CN108191352A (en) * | 2018-03-14 | 2018-06-22 | 南京富源资源利用有限公司 | The light masonry mortar prepared using discarded clay brick |
| CN114031340A (en) * | 2021-11-30 | 2022-02-11 | 东南大学 | Plastering mortar containing recycled aggregate of waste clay brick |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974489A (en) * | 2022-12-30 | 2023-04-18 | 临海市忠信新型建材有限公司 | Masonry mortar with good volume stability |
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Application publication date: 20220902 |
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