CN115974489A - Masonry mortar with good volume stability - Google Patents
Masonry mortar with good volume stability Download PDFInfo
- Publication number
- CN115974489A CN115974489A CN202211728984.6A CN202211728984A CN115974489A CN 115974489 A CN115974489 A CN 115974489A CN 202211728984 A CN202211728984 A CN 202211728984A CN 115974489 A CN115974489 A CN 115974489A
- Authority
- CN
- China
- Prior art keywords
- recycled aggregate
- parts
- masonry mortar
- volume stability
- fly ash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 45
- 239000010881 fly ash Substances 0.000 claims abstract description 30
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 16
- XYRAEZLPSATLHH-UHFFFAOYSA-N trisodium methoxy(trioxido)silane Chemical compound [Na+].[Na+].[Na+].CO[Si]([O-])([O-])[O-] XYRAEZLPSATLHH-UHFFFAOYSA-N 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 13
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 239000011398 Portland cement Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 8
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 8
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 8
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group 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 claims description 8
- 229920005646 polycarboxylate Polymers 0.000 claims description 8
- 239000001509 sodium citrate Substances 0.000 claims description 8
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical group O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 4
- CAQWNKXTMBFBGI-UHFFFAOYSA-N C.[Na] Chemical compound C.[Na] CAQWNKXTMBFBGI-UHFFFAOYSA-N 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- -1 C-S-H and the like Chemical class 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses masonry mortar with good volume stability, which comprises, by weight, 100-120 parts of cement, 65-75 parts of fly ash, 800-900 parts of sand, 30-50 parts of modified recycled aggregate and 10-15 parts of an additive; the modified recycled aggregate is prepared by sequentially modifying recycled aggregate with a composite slurry of a sodium methylsilicate solution, fly ash and silica fume. The masonry mortar prepared by the invention has good volume stability and excellent mechanical property.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to masonry mortar with good volume stability.
Background
With the development of modern construction techniques, construction mortar used in engineering is also being developed. The traditional building mortar is mixed on site, but the quality cannot be effectively controlled, and the requirement of the modern building industry is difficult to meet. The dry-mixed mortar has the advantages of high product quality, environmental protection, convenient transportation and construction, and is widely applied. The dry-mixed mortar is also called dry-mixed mortar or dry-mixed mortar, mainly comprises materials such as a cementing material, a fine aggregate, a mineral admixture, an additive and the like, is dried, weighed and uniformly stirred in a production plant, is bagged or transported in bulk to a construction site, is added with water and stirred according to the specification to be directly used as a mortar product, and is most commonly and generally applied as dry-mixed masonry mortar.
With the rapid development of economy in China in recent years, the development and construction of various municipal facilities and various buildings are accelerated, which puts higher requirements on the production efficiency and the product quality of building materials, a lot of natural resources are inevitably consumed in the building and dismantling process of the buildings, a lot of building wastes are generated, and the consumption of energy and the emission of the building wastes inevitably cause severe environmental problems, so that practical and effective methods and measures are adopted to better recycle the building wastes, and the problems become widely concerned by various social circles. How to apply the construction waste to the preparation of the mortar to reduce the preparation cost of the mortar becomes a research focus of the mortar.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the masonry mortar with good volume stability is provided, and the masonry mortar has good volume stability, good mechanical property and low preparation cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the masonry mortar with good volume stability comprises, by weight, 100-120 parts of cement, 65-75 parts of fly ash, 800-900 parts of sand, 30-50 parts of modified recycled aggregate and 10-15 parts of an additive;
the modified recycled aggregate is prepared by sequentially modifying recycled aggregate with a sodium methylsilicate solution and a composite slurry of fly ash and silica fume.
Preferably, the preparation method of the modified recycled aggregate comprises the following steps:
cleaning and drying the recycled aggregate, adding the recycled aggregate into a sodium methyl silicate solution for soaking treatment, taking out the recycled aggregate, soaking the recycled aggregate into the composite slurry of the fly ash and the silica fume again, and finally drying to obtain the modified recycled aggregate.
Preferably, the concentration of the sodium methyl silicate solution is 4-6wt%; the composite slurry of fly ash and silica fume has the fly ash concentration of 8-10wt% and silica fume concentration of 5-7wt%.
Preferably, the soaking time in the methyl sodium silicate solution is 20-30h, and the soaking time in the composite slurry of the fly ash and the silica fume is 20-30h.
Preferably, in the technical scheme, the cement is P.042.5 ordinary portland cement, the particle size of the fly ash is 40-50 μm, and the sand is machine-made sand with a fineness modulus of 2.8.
Preferably, the additive is a mixture of a water reducing agent, a thickening agent and a retarder in a mass ratio of 1.
Preferably, in the above technical solution, the water reducing agent is a polycarboxylate water reducing agent.
Preferably, the thickener is hydroxypropyl methylcellulose.
Preferably, the retarder is sodium citrate.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, the recycled aggregate is added into the mortar matrix, so that the preparation cost of the mortar is effectively reduced. In order to improve the performance of the recycled aggregate, the recycled aggregate is soaked by adopting a sodium methyl silicate solution, the sodium methyl silicate has better waterproof performance, and partial micro cracks of the recycled aggregate can be effectively sealed by bonding, permeating and filling, so that the water absorption of the recycled aggregate is reduced, and the mechanical property of the recycled aggregate is improved to a certain extent. In order to better improve the performance of the recycled aggregate, the recycled aggregate modified by the sodium methyl silicate is added into the composite slurry of the fly ash and the silica fume, so that the fly ash and the silica fume are attached to the surface of the recycled aggregate, when the cement is hydrated, the fly ash on the surface of the recycled aggregate participates in secondary hydration reaction to generate compounds such as C-S-H and the like, and pores between the recycled aggregate and the mortar are directly filled, so that the density of the mortar is improved, the combination between the recycled aggregate and the mortar is increased, the shrinkage of the mortar is reduced, and the strength of the mortar is improved.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Example 1
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 4wt% sodium methyl silicate solution, soaking for 20h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 8wt% of fly ash and 5wt% of silica fume again, treating for 20h, and finally drying at 80 ℃ to prepare modified recycled aggregate;
100 parts of P.042.5 ordinary portland cement, 65 parts of fly ash, 800-900 parts of machine-made sand, 30 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
Example 2
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 6wt% sodium methyl silicate solution, soaking for 30h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 10wt% of fly ash and 7wt% of silica fume again, treating for 30h, and finally drying at 90 ℃ to prepare modified recycled aggregate;
100 parts of P.042.5 ordinary portland cement, 65 parts of fly ash, 800-900 parts of machine-made sand, 30 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
Example 3
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 4.5wt% sodium methyl silicate solution, soaking for 22h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 8.5wt% of fly ash and 5.5wt% of silica fume again, treating for 22h, and drying at 80 ℃ to prepare modified recycled aggregate;
100 parts of P.042.5 ordinary portland cement, 66 parts of fly ash, 800 parts of machine-made sand, 31 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
Example 4
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 5wt% sodium methyl silicate solution, soaking for 24h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 9wt% of fly ash and 6wt% of silica fume again, treating for 24h, and finally drying at 85 ℃ to prepare modified recycled aggregate;
105 parts of P.042.5 ordinary portland cement, 67 parts of fly ash, 800 parts of machine-made sand, 31 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
Example 5
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 5.5wt% sodium methyl silicate solution, soaking for 26h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 9.5wt% of fly ash and 6.5wt% of silica fume again, treating for 22h, and finally drying at 85 ℃ to prepare modified recycled aggregate;
100 parts of P.042.5 ordinary portland cement, 68 parts of fly ash, 800 parts of machine-made sand, 33 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
Example 6
Cleaning and drying 100g of recycled aggregate, adding the recycled aggregate into 500ml of 5wt% sodium methyl silicate solution, soaking for 28h, taking out the recycled aggregate, soaking into 500ml of composite slurry containing 9wt% of fly ash and 6wt% of silica fume again, treating for 28h, and finally drying at 80 ℃ to prepare modified recycled aggregate;
100 parts of P.042.5 ordinary portland cement, 66 parts of fly ash, 800 parts of machine-made sand, 32 parts of modified recycled aggregate, 3 parts of polycarboxylate water reducing agent, 4 parts of hydroxypropyl methyl cellulose and 3 parts of sodium citrate are mixed by weight to prepare the masonry mortar.
The prepared masonry mortar and water are mixed, the water-cement ratio is controlled to be 0.30, and a performance test method of the mortar refers to JGJ/T70-2009 building mortar basic performance test method standard. The test results are shown in table 1.
TABLE 1
From the test results, the masonry mortar modified by the recycled aggregate has the advantages of good water retention property, small shrinkage, good volume stability and good mechanical property.
Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (9)
1. The masonry mortar with good volume stability is characterized by comprising, by weight, 100-120 parts of cement, 65-75 parts of fly ash, 800-900 parts of sand, 30-50 parts of modified recycled aggregate and 10-15 parts of an additive;
the modified recycled aggregate is prepared by sequentially modifying recycled aggregate with a sodium methylsilicate solution and a composite slurry of fly ash and silica fume.
2. A masonry mortar with good volume stability according to claim 1, wherein the preparation method of the modified recycled aggregate comprises the following steps:
cleaning and drying the recycled aggregate, adding the recycled aggregate into a sodium methyl silicate solution for soaking treatment, taking out the recycled aggregate, soaking the recycled aggregate into the composite slurry of the fly ash and the silica fume again, and finally drying to obtain the modified recycled aggregate.
3. A masonry mortar with good volume stability according to claim 2, characterized in that the concentration of sodium methyl silicate solution is 4-6wt%; the composite slurry of fly ash and silica fume has the concentration of 8-10wt% and the concentration of 5-7wt% of silica fume.
4. A masonry mortar with good volume stability according to claim 2, characterized in that the soaking time in the methyl sodium silicate solution is 20-30h, and the soaking time in the composite slurry of fly ash and silica fume is 20-30h.
5. A masonry mortar with good volume stability as claimed in claim 1, characterized in that said cement is P042.5 ordinary portland cement, said fly ash has a particle size of 40-50 μm, and said sand is machine-made sand with a fineness modulus of 3.8.
6. The masonry mortar with good volume stability according to claim 1, wherein the additive is a mixture of a water reducing agent, a thickening agent and a retarder in a mass ratio of 1.
7. A masonry mortar with good volume stability according to claim 6 characterised in that the water reducer is a polycarboxylate water reducer.
8. A masonry mortar with good volume stability according to claim 6 characterised in that the thickener is hydroxypropylmethylcellulose.
9. A masonry mortar with good volume stability according to claim 6 wherein the retarder is sodium citrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211728984.6A CN115974489A (en) | 2022-12-30 | 2022-12-30 | Masonry mortar with good volume stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211728984.6A CN115974489A (en) | 2022-12-30 | 2022-12-30 | Masonry mortar with good volume stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115974489A true CN115974489A (en) | 2023-04-18 |
Family
ID=85966431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211728984.6A Pending CN115974489A (en) | 2022-12-30 | 2022-12-30 | Masonry mortar with good volume stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115974489A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
| CN111732395A (en) * | 2020-07-22 | 2020-10-02 | 佛山市交通科技有限公司 | Waste concrete-based regenerated dry powder masonry mortar and preparation method thereof |
| CN112608093A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | Dry-mixed plastering mortar prepared from recycled aggregate and preparation method thereof |
| CN112608052A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | Dry-mixed masonry mortar prepared from recycled aggregate and preparation method thereof |
| CN114591049A (en) * | 2022-03-29 | 2022-06-07 | 武昌理工学院 | Method for preparing green mortar by using construction waste |
| CN114988798A (en) * | 2022-05-30 | 2022-09-02 | 东南大学 | Masonry mortar prepared from recycled brick aggregate and preparation method thereof |
-
2022
- 2022-12-30 CN CN202211728984.6A patent/CN115974489A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007438A (en) * | 2016-05-24 | 2016-10-12 | 湖南大学 | Treatment method of volcanic-ash-paste-reinforced recycled concrete aggregate |
| CN111732395A (en) * | 2020-07-22 | 2020-10-02 | 佛山市交通科技有限公司 | Waste concrete-based regenerated dry powder masonry mortar and preparation method thereof |
| CN112608093A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | Dry-mixed plastering mortar prepared from recycled aggregate and preparation method thereof |
| CN112608052A (en) * | 2020-07-28 | 2021-04-06 | 厦门天润锦龙建材有限公司 | Dry-mixed masonry mortar prepared from recycled aggregate and preparation method thereof |
| CN114591049A (en) * | 2022-03-29 | 2022-06-07 | 武昌理工学院 | Method for preparing green mortar by using construction waste |
| CN114988798A (en) * | 2022-05-30 | 2022-09-02 | 东南大学 | Masonry mortar prepared from recycled brick aggregate and preparation method thereof |
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