CN110922106B - Building waste recycled aggregate masonry mortar and preparation method thereof - Google Patents
Building waste recycled aggregate masonry mortar and preparation method thereof Download PDFInfo
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- CN110922106B CN110922106B CN201911131600.0A CN201911131600A CN110922106B CN 110922106 B CN110922106 B CN 110922106B CN 201911131600 A CN201911131600 A CN 201911131600A CN 110922106 B CN110922106 B CN 110922106B
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- powder
- waste
- cellulose ether
- dimethylolpropionic acid
- triethanolamine
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 53
- 239000002699 waste material Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 88
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 68
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 67
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000004576 sand Substances 0.000 claims abstract description 41
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 40
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Tris Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 34
- 229920005610 lignin Polymers 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000004575 stone Substances 0.000 claims abstract description 26
- 229920000126 Latex Polymers 0.000 claims abstract description 23
- 239000004816 latex Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims description 48
- 238000000227 grinding Methods 0.000 claims description 45
- 239000010878 waste rock Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- VUKAUDKDFVSVFT-UHFFFAOYSA-N 2-[6-[4,5-bis(2-hydroxypropoxy)-2-(2-hydroxypropoxymethyl)-6-methoxyoxan-3-yl]oxy-4,5-dimethoxy-2-(methoxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)-5-methoxyoxane-3,4-diol Chemical compound COC1C(OC)C(OC2C(C(O)C(OC)C(CO)O2)O)C(COC)OC1OC1C(COCC(C)O)OC(OC)C(OCC(C)O)C1OCC(C)O VUKAUDKDFVSVFT-UHFFFAOYSA-N 0.000 claims description 4
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 4
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 4
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 4
- 239000010438 granite Substances 0.000 claims description 3
- 239000004579 marble Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 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
- 239000000463 material Substances 0.000 abstract description 18
- 239000012467 final product Substances 0.000 abstract description 8
- 239000004566 building material Substances 0.000 abstract description 2
- 239000000839 emulsion Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 16
- 206010016807 Fluid retention Diseases 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 235000015450 Tilia cordata Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000000126 substance Substances 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
Abstract
The invention is suitable for the technical field of building materials, and provides building garbage recycled aggregate masonry mortar and a preparation method thereof, wherein the building garbage recycled aggregate masonry mortar comprises the following components in percentage by weight: 2-5% of medium sand; 18-25% of cement; 8-15% of waste stone powder; 0.1-0.5% of dimethylolpropionic acid; 0.1-0.5% of triethanolamine; 1-3% of ethylene glycol; 1-2% of cellulose ether; 0.5-1% of lignin calcium sulfate; 1-1.5% of latex powder; the rest is water. According to the invention, the waste stone powder, the dimethylolpropionic acid, the triethanolamine, the glycol, the cellulose ether, the lignin calcium sulfate and the emulsion powder are added into the main materials of the sand and the cement in a specific ratio to jointly form the cementing material, so that the natural river sand resource is saved, the cost is reduced, meanwhile, the hardness, the crack resistance and the toughness of the mortar are improved, the final product has good workability and operability, the ground is high in leveling strength and strong in binding force, and the quality requirements of the building industry are met.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to building waste recycled aggregate masonry mortar and a preparation method thereof.
Background
Mortars are cementitious substances used in the construction of bricks and are generally formed by the addition of water to a certain proportion of sand and a cementitious material (cement, lime paste, clay, etc.), also known as mortar. With the development of society, the constant innovation of building mortar materials and construction technology, mortar plays roles of bonding, lining, protection and decoration in a thin layer in the building industry, so that the mortar is increasingly widely applied to building and decoration engineering.
However, as the engineering quality, environmental protection requirements and civilized construction requirements are continuously improved, the disadvantages and limitations of mortar use are more and more prominent. At present, the building mortar material on the market is full of mineral and various in variety, but most of the building mortar material adopts natural river sand, the natural river sand is in shortage of resources, and the ecological environment is easily damaged by sand collection; meanwhile, the existing mortar material has poor stability and poor fluidity in the use process, mortar is easy to crack, and has the common defects of ground sanding, ground hollowing, ground cracks, ground peeling and the like, and meanwhile, the mortar material has the problems of poor dispersibility, poor water retention, long setting time, poor heat resistance and water resistance and the like, and cannot meet the quality requirements of the building industry.
Therefore, the problems of easy cracking, poor fluidity, poor water retention, long setting time and the like generally exist in the conventional mortar material.
Disclosure of Invention
The embodiment of the invention provides building waste recycled aggregate masonry mortar, and aims to solve the problems of easy cracking, poor fluidity, poor water retention, long setting time and the like of the conventional mortar material.
The embodiment of the invention is realized in such a way that the building garbage recycled aggregate masonry mortar comprises the following components in percentage by weight:
2-5% of medium sand; 18-25% of cement; 8-15% of waste stone powder; 0.1-0.5% of dimethylolpropionic acid; 0.1-0.5% of triethanolamine; 1-3% of ethylene glycol; 1-2% of cellulose ether; 0.5-1% of lignin calcium sulfate; 1-1.5% of latex powder; the rest is water.
The embodiment of the invention also provides a preparation method of the building garbage recycled aggregate masonry mortar, which comprises the following steps:
weighing the following raw materials in percentage by weight:
2-5% of medium sand, 18-25% of cement, 8-15% of waste stone powder, 0.1-0.5% of dimethylolpropionic acid, 0.1-0.5% of triethanolamine, 1-3% of ethylene glycol, 1-2% of cellulose ether, 0.5-1% of lignin calcium sulfate, 1-1.5% of latex powder and the balance of water;
in an alkaline environment, placing the cellulose ether and the lignin calcium sulfate in a water bath at the temperature of 40-50 ℃, stirring for 0.5-1 h, and cooling to room temperature to obtain a first mixture;
mixing the dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution;
adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 80-120 ℃ for 1-3 hours to obtain a second mixture;
grinding the cement, adding the triethanolamine and the ethylene glycol in the grinding process, adding the second mixture after grinding for 0.5-1 h, and continuously grinding for 0.5-1 h to obtain a third mixture;
and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
In the embodiment of the invention, the components of waste stone powder, dimethylolpropionic acid, triethanolamine, glycol, cellulose ether, lignin calcium sulfate and emulsion powder in a specific ratio are added into the main materials of sand and cement to jointly form the gelled mortar material, so that the natural river sand resource is saved, the cost is reduced, and meanwhile, the hardness, the crack resistance and the toughness of the mortar are improved, so that the final product has good workability and operability, the ground is high in leveling strength, the cohesive force is strong, and the quality requirement of the building industry is met.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the building waste recycled aggregate masonry mortar provided by the embodiment of the invention, the components of waste stone powder, dimethylolpropionic acid, triethanolamine, glycol, cellulose ether, lignin calcium sulfate and latex powder in a specific ratio are added into the main material sand and cement to jointly form a cementing material, so that the natural river sand resource is saved, the cost is reduced, meanwhile, the hardness, the crack resistance and the toughness of the mortar are improved, the final product has good workability and operability, the large ground leveling strength and the strong binding power are realized, and the quality requirements of the building industry are met.
The waste stone powder is one or two of waste marble powder and waste granite powder, and the particle size ranges from 20 to 50 micrometers (the components and the weight ratio of the waste stone powder used in the embodiment of the invention are waste marble powder and waste granite powder are 1: 1). Aiming at the protection of natural resources, the ecology is not damaged, and the concept of changing waste into valuable is realized, in order to solve the problems that the natural river sand is difficult to collect sand and the adverse effect of seriously damaging the ecological balance is caused, and the environment can be better protected, the invention can omit the components of the natural river sand by adding the waste stone powder, and is beneficial to resource utilization, energy conservation and environmental protection. However, in the actual research and development process, the waste rock powder treated by the dimethylolpropionic acid solution is more beneficial to improving the water retention of the mortar.
Wherein, the main material sand, namely the medium sand, is continuous grade machine-made sand, the content of stone powder is 8-15%, and the mesh number is less than or equal to 80 meshes.
Wherein, the main material cement is ordinary portland cement, and the grade strength is 32.5. Researches show that the treatment of triethanolamine and ethylene glycol with a specific weight ratio of 3:20 in the cement grinding process can achieve a good grinding aid effect, and is beneficial to improving the overall compressive strength and the freezing resistance of the product.
The cellulose ether is selected from one of methyl cellulose ether and hydroxypropyl methyl cellulose ether, and more preferably hydroxypropyl methyl cellulose ether (the cellulose ether used in the embodiment of the invention is hydroxypropyl methyl cellulose ether). The cellulose ether and the lignin calcium sulfate in a weight ratio of 2:1 are subjected to water-bath heating and mixing treatment in an alkaline environment, so that the cellulose ether and the lignin calcium sulfate are easy to disperse in a mortar system, and the water retention and the tensile bonding strength of a final product are directly influenced.
In the embodiment of the invention, the preparation method of the building garbage recycled aggregate masonry mortar comprises the following steps:
weighing the following raw materials in percentage by weight:
2-5% of medium sand, 18-25% of cement, 8-15% of waste stone powder, 0.1-0.5% of dimethylolpropionic acid, 0.1-0.5% of triethanolamine, 1-3% of ethylene glycol, 1-2% of cellulose ether, 0.5-1% of lignin calcium sulfate, 1-1.5% of latex powder and the balance of water;
in an alkaline environment (with a pH value of 8-11), placing the cellulose ether and the lignin calcium sulfate in a water bath at a temperature of 40-50 ℃, stirring for 0.5-1 h, and cooling to room temperature to obtain a first mixture;
mixing the dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution;
adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 80-120 ℃ for 1-3 hours to obtain a second mixture;
grinding the cement, adding the triethanolamine and the ethylene glycol in the grinding process, adding the second mixture after grinding for 0.5-1 h, and continuously grinding for 0.5-1 h to obtain a third mixture;
and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
In a preferred embodiment of the present invention, the step of adding the dimethylolpropionic acid solution to the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at a temperature of 80 to 120 ℃ for 1 to 3 hours to obtain a second mixture specifically includes:
and adding the dimethylolpropionic acid solution into the waste rock powder, putting the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 100 ℃ for 2 hours to obtain a second mixture.
In a preferred embodiment of the present invention, the step of grinding the cement, adding the triethanolamine and the ethylene glycol during the grinding process, grinding for 0.5 to 1 hour, adding the second mixture, and further grinding for 0.5 to 1 hour to obtain a third mixture specifically includes:
and grinding the cement, adding the triethanolamine and the ethylene glycol in the grinding process, grinding for 0.5h, adding the second mixture, and continuously grinding for 0.5h to obtain a third mixture.
The technical effects of the construction waste recycled aggregate masonry mortar of the present invention will be further described below with reference to specific examples.
Example 1
The building waste recycled aggregate masonry mortar comprises the following components in percentage by weight:
2% of medium sand; 25% of cement; 10 percent of waste stone powder; dimethylolpropionic acid 0.2%; 0.2 percent of triethanolamine; 1% of ethylene glycol; 1.2% of cellulose ether; 0.7 percent of lignin calcium sulfate; 1.5 percent of latex powder; 58.2 percent of water.
Weighing the raw materials according to the weight percentage; under an alkaline environment, placing cellulose ether and lignin calcium sulfate in a water bath at 40 ℃, stirring for 0.5h, and cooling to room temperature to obtain a first mixture; mixing dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution; adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 80 ℃ for 1 hour to obtain a second mixture; grinding the cement, adding triethanolamine and ethylene glycol in the grinding process, grinding for 0.5h, adding the second mixture, and continuously grinding for 0.5h to obtain a third mixture; and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
Example 2
The building waste recycled aggregate masonry mortar comprises the following components in percentage by weight:
4.7 percent of medium sand; 19.4% of cement; 10.7 percent of waste stone powder; dimethylolpropionic acid 0.3%; 0.4 percent of triethanolamine; 3% of ethylene glycol; 2% of cellulose ether; 1% of lignin calcium sulfate; 1% of latex powder; 57.5 percent of water.
Weighing the raw materials according to the weight percentage; under an alkaline environment, placing cellulose ether and lignin calcium sulfate in a water bath at 50 ℃, stirring for 1h, and cooling to room temperature to obtain a first mixture; mixing dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution; adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 120 ℃ for 3 hours to obtain a second mixture; grinding the cement, adding triethanolamine and ethylene glycol in the grinding process, grinding for 1h, adding the second mixture, and continuously grinding for 1h to obtain a third mixture; and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
Example 3
The building waste recycled aggregate masonry mortar comprises the following components in percentage by weight:
3% of medium sand; 20.5 percent of cement; 10.5 percent of waste stone powder; dimethylolpropionic acid 0.2%; 0.2 percent of triethanolamine; 1.5 percent of ethylene glycol; 1.3% of cellulose ether; 0.6 percent of lignin calcium sulfate; 1.1 percent of latex powder; and (5) 61.1% of water.
Weighing the raw materials according to the weight percentage; in an alkaline environment, placing cellulose ether and lignin calcium sulfate in a water bath at 45 ℃, stirring for 0.5h, and cooling to room temperature to obtain a first mixture; mixing dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution; adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 90 ℃ for 2 hours to obtain a second mixture; grinding the cement, adding triethanolamine and ethylene glycol in the grinding process, grinding for 0.5h, adding the second mixture, and continuously grinding for 0.5h to obtain a third mixture; and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
Example 4
The building waste recycled aggregate masonry mortar comprises the following components in percentage by weight:
4% of medium sand; 22.8 percent of cement; waste stone powder 12.4%; dimethylolpropionic acid 0.4%; 0.4 percent of triethanolamine; 2.5 percent of ethylene glycol; 1.7% of cellulose ether; 0.9 percent of lignin calcium sulfate; 1.4 percent of latex powder; and (5) water.
Weighing the raw materials according to the weight percentage; under an alkaline environment, placing cellulose ether and lignin calcium sulfate in a water bath at 50 ℃, stirring for 1h, and cooling to room temperature to obtain a first mixture; mixing dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution; adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 110 ℃ for 3 hours to obtain a second mixture; grinding the cement, adding triethanolamine and ethylene glycol in the grinding process, grinding for 1h, adding the second mixture, and continuously grinding for 0.5h to obtain a third mixture; and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
Example 5
The building waste recycled aggregate masonry mortar comprises the following components in percentage by weight:
3.5 percent of medium sand; 21.5 percent of cement; 11.5 percent of waste stone powder; dimethylolpropionic acid 0.3%; 0.3 percent of triethanolamine; 2% of ethylene glycol; 1.5% of cellulose ether; 0.75 percent of lignin calcium sulfate; 1.25 percent of latex powder; 57.4 percent of water.
Weighing the raw materials according to the weight percentage; in an alkaline environment, placing cellulose ether and lignin calcium sulfate in a water bath at 45 ℃, stirring for 0.5h, and cooling to room temperature to obtain a first mixture; mixing dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution; adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 100 ℃ for 2 hours to obtain a second mixture; grinding the cement, adding triethanolamine and ethylene glycol in the grinding process, grinding for 0.5h, adding the second mixture, and continuously grinding for 0.5h to obtain a third mixture; and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
The invention takes performance indexes tested by similar products at home and abroad and practical application requirements thereof as reference values, particularly indexes such as water retention rate, frost resistance, compressive strength and the like of the products as basis, and specially prepares enterprise standard Q/ZDF 004-. The construction waste recycled aggregate masonry mortar prepared in the above examples 1 to 5 was tested for water retention, setting time, consistency loss, tensile bond strength, frost resistance and compressive strength according to the enterprise standard, and the test results are shown in table 1:
TABLE 1
In summary, as can be seen from the detection results in table 1, the cellulose modified mortar prepared in embodiments 1 to 5 of the present invention has the properties of water retention, setting time, consistency loss, tensile bond strength, frost resistance, compressive strength, etc. all meeting the technical requirements, and simultaneously has good fluidity and higher water retention compared with the mortar on the market, and simultaneously improves the hardness, crack resistance and toughness of the mortar, so that the final product has good workability and operability, realizes large ground leveling strength and strong adhesion, and meets the quality requirements of the building industry.
In addition, a large number of experiments show that the proportioning content of triethanolamine and ethylene glycol has a relatively obvious influence on the product performance when the triethanolamine and the ethylene glycol are treated in the cement grinding process, in order to research the optimal proportioning content, on the basis of the above optimal performance example 5, the invention correspondingly adjusts the weight percentage content of the triethanolamine to be 0, 0.05%, 0.6% and 1.0% in sequence, correspondingly increases or decreases the water content, and keeps the content of the other components unchanged, carries out comparative examples 1 to 4, and tests the water retention rate, the setting time, the consistency loss rate, the tensile bonding strength, the frost resistance and the compressive strength of the construction waste recycled aggregate masonry mortar prepared by the comparative examples 1 to 4 according to the enterprise standards, wherein the test results are shown in table 2:
TABLE 2
In summary, from the test results in table 2, it can be seen that when triethanolamine and ethylene glycol are treated in the cement grinding process, the proportioning content of triethanolamine and ethylene glycol has an obvious influence on the overall compressive strength and freezing resistance of the product, and when the triethanolamine content is too high or too low (including the case where triethanolamine is not added), the freezing resistance and the compression resistance of the prepared building waste recycled aggregate masonry mortar cannot meet the technical requirements of the product, and the optimal proportioning ratio of triethanolamine and ethylene glycol is determined to be 3: 20; namely, the triethanolamine and the ethylene glycol in a specific weight ratio of 3:20 can play a good grinding-aiding effect in the cement grinding process, and are beneficial to improving the overall compressive strength and the freezing resistance of the product, because the weight ratio is beneficial to improving the fineness of the cement and concentrating the particle size distribution.
In addition, a large number of experiments show that the cellulose ether and the lignin calcium sulfate in a specific weight ratio are subjected to water-bath heating and mixing treatment in an alkaline environment, so that the cellulose ether and the lignin calcium sulfate are easy to disperse in a mortar system, and the water retention and the tensile bonding strength of a final product are directly influenced; specifically, see the test results of comparative examples 5 to 7 shown in table 3, wherein the comparative examples 5 to 7 are respectively based on example 5, the weight percentages of the cellulose ether are adjusted to 0%, 0.5% and 3% in sequence, the moisture content is adaptively increased or decreased and modified, the other components and the content are not changed, the water retention rate and the tensile bond strength of the construction waste recycled aggregate masonry mortar prepared according to the comparative examples 5 to 7 are tested according to the enterprise standards, and the test results are shown in table 3:
TABLE 3
In summary, from the test results in table 3, the proportion content of cellulose ether and calcium sulfate lignin has a direct influence on the overall water retention rate and tensile bond strength of the product, when the content of cellulose ether is too high or too low (including the case where no cellulose ether is added), the water retention rate and tensile bond strength of the prepared building waste recycled aggregate masonry mortar cannot meet the technical requirements of the product, and the optimal weight proportion ratio of cellulose ether to calcium sulfate lignin is determined to be 2: 1; the cellulose ether and the lignin calcium sulfate in a specific weight ratio of 2:1 are subjected to water-bath heating and mixing treatment in an alkaline environment, so that the cellulose ether and the lignin calcium sulfate are easy to disperse in a mortar system, and the water retention and the tensile bonding strength of a final product are directly influenced.
In summary, the construction waste recycled aggregate masonry mortar provided by the embodiment of the invention is prepared by adding waste stone powder, dimethylolpropionic acid, triethanolamine, ethylene glycol, cellulose ether, lignin calcium sulfate and latex powder components in a specific ratio into main material sand and cement to jointly form a cementing material, so that natural river sand resources are saved, the cost is reduced, meanwhile, the hardness, the crack resistance and the toughness of the mortar are improved, the final product has good workability and operability, the large ground leveling strength and the strong binding power are realized, and the quality requirements of the construction industry are met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The building waste recycled aggregate masonry mortar is characterized by comprising the following components in percentage by weight:
2-5% of medium sand; 18-25% of cement; 8-15% of waste stone powder; 0.1-0.5% of dimethylolpropionic acid; 0.1-0.5% of triethanolamine; 1-3% of ethylene glycol; 1-2% of cellulose ether; 0.5-1% of lignin calcium sulfate; 1-1.5% of latex powder; the rest components are water;
the weight ratio of the triethanolamine to the ethylene glycol is 3:20, the medium sand is continuous-grade machine-made sand, the stone powder content is 8-15%, the mesh number is less than or equal to 80 meshes, the waste stone powder is one or two of waste marble powder and waste granite powder, the particle size is 20-50 mu m, and the cellulose ether is one of methyl cellulose ether and hydroxypropyl methyl cellulose ether; the preparation method of the building garbage recycled aggregate masonry mortar comprises the following steps:
weighing the following raw materials in percentage by weight:
2-5% of medium sand, 18-25% of cement, 8-15% of waste stone powder, 0.1-0.5% of dimethylolpropionic acid, 0.1-0.5% of triethanolamine, 1-3% of ethylene glycol, 1-2% of cellulose ether, 0.5-1% of lignin calcium sulfate, 1-1.5% of latex powder and the balance of water;
in an alkaline environment, placing the cellulose ether and the lignin calcium sulfate in a water bath at the temperature of 40-50 ℃, stirring for 0.5-1 h, and cooling to room temperature to obtain a first mixture;
mixing the dimethylolpropionic acid with water to prepare a dimethylolpropionic acid solution;
adding the dimethylolpropionic acid solution into the waste rock powder, placing the waste rock powder into a reaction kettle, and stirring the waste rock powder at the temperature of 80-120 ℃ for 1-3 hours to obtain a second mixture;
grinding the cement, adding the triethanolamine and the ethylene glycol in the grinding process, adding the second mixture after grinding for 0.5-1 h, and continuously grinding for 0.5-1 h to obtain a third mixture;
and adding the medium sand and the latex powder into the third mixture, and fully stirring and mixing to obtain the product.
2. The construction waste recycled aggregate masonry mortar of claim 1, comprising the following components in percentage by weight:
3-4% of medium sand; 20-23% of cement; 10-13% of waste stone powder; 0.2-0.4% of dimethylolpropionic acid; 0.2-0.4% of triethanolamine; 1.5-2.5% of ethylene glycol; 1.3-1.7% of cellulose ether; 0.6-0.9% of lignin calcium sulfate; 1.1-1.4% of latex powder; the rest is water.
3. The construction waste recycled aggregate masonry mortar of claim 1, comprising the following components in percentage by weight:
3.5 percent of medium sand; 21.5 percent of cement; 11.5 percent of waste stone powder; dimethylolpropionic acid 0.3%; 0.3 percent of triethanolamine; 2% of ethylene glycol; 1.5% of cellulose ether; 0.75 percent of lignin calcium sulfate; 1.25 percent of latex powder; the rest is water.
4. The construction waste recycled aggregate masonry mortar of claim 1, wherein the weight ratio of cellulose ether to lignin calcium sulfate is 2: 1.
5. The construction waste recycled aggregate masonry mortar of claim 1, wherein the preparation of the second mixture specifically comprises: adding dimethylolpropionic acid solution into the waste stone powder, placing the waste stone powder into a reaction kettle, and stirring the waste stone powder for 2 hours at the temperature of 100 ℃ to obtain a second mixture.
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