CN113880515A - Preparation method of waste glass mortar and waste glass mortar - Google Patents

Preparation method of waste glass mortar and waste glass mortar Download PDF

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Publication number
CN113880515A
CN113880515A CN202111157341.6A CN202111157341A CN113880515A CN 113880515 A CN113880515 A CN 113880515A CN 202111157341 A CN202111157341 A CN 202111157341A CN 113880515 A CN113880515 A CN 113880515A
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Prior art keywords
mortar
waste glass
glass
glass powder
waste
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CN202111157341.6A
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Inventor
周钰鑫
王楷焘
靳丁帅男
施佳汇
岳龙
王晟
周鸣
钱金龙
王海洲
朱一楠
池其斌
戴云春
浦凡
杨宇航
马驭荣
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Nanjing Institute of Technology
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Nanjing Institute of Technology
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    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

The invention provides a preparation method of waste glass mortar and the waste glass mortar, and the method comprises the following steps: (1) mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing with the waste glass powder, and putting the mixture into a high-pressure kettle for hydrothermal treatment; putting the activated glass powder into a thermostat for drying, and grinding the glass powder into micro powder of 75-300 mu m; (2) pouring the activated and ground glass powder, common Portland cement and standard sand into a stirrer for mixing and stirring, then adding water, and continuing stirring to obtain the physical-chemical-hydrothermal combined activated waste glass mortar; the common Portland cement, standard sand, glass powder and Na2SO4And the mass ratio of the mixed alkali to the water is 1: (1.575-2.025): (0.225-0.675): (0-0.06): (0-0.06): 0.47. prepared by the schemeThe waste glass mortar has good compressive strength and flexural strength, the expansion rate of the mortar is lower than a standard threshold value, the waste glass is recycled, and the environment-friendly significance is great. The invention has reasonable design, simple operation and strong practicability.

Description

Preparation method of waste glass mortar and waste glass mortar
The technical field is as follows:
the invention belongs to the technical field of concrete, and particularly relates to a preparation method of waste glass mortar and the waste glass mortar.
Background art:
the waste glass refers to glass materials such as glass, glass products, glass fibers and the like which are not used or are discarded, the natural degradation time of the waste glass after being used as waste garbage for landfill treatment is as long as 4000 years, and the non-degradable characteristic can cause serious environmental pollution. The main component of the glass is silicon dioxide, and the glass has a certain volcanic ash activity, so that the glass can be added into concrete as a potential auxiliary cementing material to realize resource utilization of waste glass, and has great significance for environmental protection. In recent years, more and more students research waste glass concrete, but the difference of factors such as color, particle size and mixing amount of waste glass can influence the mechanical property and expansion risk (alkali-aggregate reaction) of concrete, so that the method has great scientific research significance for further research of waste glass concrete.
The waste glass has certain volcanic ash characteristics, can be used as a cement substitute material, and improves the mechanical properties of concrete. However, the silica tetrahedron structure of the glass is stable, and the volcanic ash activity is not easy to be excited, so that an activation method needs to be found to fully exert the auxiliary gelation effect. But at the same time the glass activity is controlled, which would otherwise result in excessive detrimental swelling. The physical activation is mainly that waste glass is ball-milled to a certain particle size range through mechanical force, active substances are released, and glass powder in the certain particle size range can well inhibit ASR expansion. The chemical activation is mainly to add an activator into a cement system, but the mixing amount of the glass powder and the chemical agent needs to be controlled well, the glass powder cannot be sufficiently excited by too little chemical agent, and if the mixing amount is too much, the excessive ASR expansion is caused. Therefore, a suitable activation method is required to prepare concrete with excellent performance. According to the invention, a chemical reagent is mixed into mortar to activate waste glass powder, so that waste glass mortar activated by physical-chemical-hydrothermal combination is generated.
The invention content is as follows:
the invention aims to provide a preparation method of waste glass mortar and the waste glass mortar, aiming at the defects of the prior art, the method selects waste white spirit bottles of a waste recovery station, ball-mills the waste white spirit bottles into micro powder with the particle size of 75-300 mu m, and designs different proportions to replace standard sand after activation so as to research and explore the influence of physical-chemical-hydrothermal combined activation on the activity of waste glass and the mechanical strength of mortar.
The invention adopts the following technical scheme:
a preparation method of waste glass mortar comprises the following steps:
s1 activation of glass powder: mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with the waste glass powder, and putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder after drying;
s2, preparation of waste glass mortar: and (4) pouring the glass powder activated and ground in the step (S1), ordinary portland cement and standard sand into a stirrer for mixing and stirring, then adding water, and continuing stirring to obtain the physical-chemical-hydrothermal combined activated waste glass mortar.
Further, the ordinary portland cement, standard sand, glass powder and Na2SO4And the mass ratio of the mixed alkali to the water is 1: (1.575-2.025): (0.225-0.675): (0-0.06): (0-0.06): 0.47.
further, the mixed alkali is a mixture of sodium hydroxide and calcium hydroxide, and the mixing ratio of the sodium hydroxide to the calcium hydroxide is 1: 1.
Further, in S1, the average particle size of the activated and ground glass powder is 75 to 300 μm.
Further, in S1, the hydrothermal treatment conditions were: the hydrothermal treatment time is 2 hours at 126 ℃ and 0.143 MPa.
Further, in S2, mixing and stirring the activated and ground glass powder, ordinary portland cement and standard sand in a stirrer for 200-300 seconds; and (4) continuously stirring for 400-500 seconds after adding water.
Further, after the preparation of the waste glass mortar is finished, a cubic axis compressive strength test, a bending strength test and an ASR reaction expansion rate test are carried out.
Further, the compression strength test produced the mortar into test pieces of 50mm by 50mm, the bending strength test produced the mortar into test pieces of 40mm by 160mm, and the expansion rate test produced the mortar into test pieces of 25mm by 280 mm.
The invention also provides the waste glass mortar prepared by the preparation method.
The invention has the beneficial effects that:
1. at present, most of waste glass is mainly treated by landfill, and serious environmental pollution is caused due to nondegradable glass. The main component of the glass is silicon dioxide, and the glass has a certain degree of volcanic ash activity, so that the glass can be added into concrete as a potential auxiliary cementing material to realize resource utilization of waste glass, and has great significance for environmental protection;
2. the invention provides a suitable mortar preparation method; the silica tetrahedron structure of the glass is stable, and the volcanic ash activity is not easy to excite, so that the activity of the glass can not be fully exerted. However, after the active substances are released, the activity of the waste glass is not controlled, and excessive harmful expansion can be generated by the alkali aggregate reaction, which is also one of important restriction factors for popularizing the application of the waste glass concrete. Therefore, a proper mortar preparation method is explored, the activity of the waste glass can be fully exerted, the expansion caused by ASR reaction can be inhibited, the important scientific research significance is achieved, and the application of the waste glass concrete can be popularized;
3. in the preparation process of the physical-chemical-hydrothermal combined activated waste glass mortar, a plurality of activation modes are adopted, and the composite activation overcomes the defect of a single activation mode, integrates the advantages of the various activation modes, has better effect and prepares the mortar with excellent performance.
Description of the drawings:
FIG. 1 is an SEM image of a glass frit according to the present invention;
FIG. 2 is a failure mode diagram of the mechanical test in example 4 of the present invention;
FIG. 3 is a sectional view of a fracture resistance test in example 4 of the present invention;
FIG. 4 is an SEM image of the waste glass mortar of example 4 of the present invention.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 2.025 parts; glass powder: 0.225 parts; na (Na)2SO4: 0.02 part; mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0.02 part; water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps:
s1, activating glass powder: mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with waste glass powder, putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder, wherein the hydrothermal treatment conditions are as follows: the hydrothermal treatment time is 2 hours at the temperature of 126 ℃ and the pressure of 0.143 MPa; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder (the average particle size is 75 mu m) after drying;
s2, preparation of waste glass mortar: and pouring the glass powder activated and ground in the step S1, ordinary portland cement and standard sand into a stirrer to be mixed and stirred for 200 seconds, then adding water, and continuing stirring for 400 seconds to obtain the physical-chemical-hydrothermal jointly activated waste glass mortar.
Example 2
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 2.025 parts; glass powder: 0.225 parts; na (Na)2SO4: 0.02 part; mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0.02 part; water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps (without hydrothermal treatment):
s1, mixing the ordinary Portland cement, the standard sand and the glass powder according to a proportion, stirring for 200 seconds, and uniformly mixing to obtain a dry material component A;
s2, mixing Na2SO4Uniformly mixing the mixed alkali and water according to a proportion to obtain a mixed solution B;
and S3, pouring the dry material component A prepared in the S1 into the mixed solution B prepared in the S2, stirring for 400-500 seconds, and uniformly mixing to obtain the waste glass mortar activated by the physical-chemical combination.
Example 3
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 2.025 parts; glass powder: 0.225 parts; na (Na)2SO4: 0 part of (C); mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0 part of (C); water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps:
s1, activating glass powder: mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with waste glass powder, putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder, wherein the hydrothermal treatment conditions are as follows: the hydrothermal treatment time is 2 hours at the temperature of 126 ℃ and the pressure of 0.143 MPa; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder (the average particle size is 75 mu m) after drying;
s2, preparation of waste glass mortar: and pouring the glass powder activated and ground in the step S1, ordinary portland cement and standard sand into a stirrer to be mixed and stirred for 200 seconds, then adding water, and continuing stirring for 400 seconds to obtain the physical-chemical-hydrothermal jointly activated waste glass mortar.
Example 4
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 1.575 parts; glass powder: 0.675 part; na (Na)2SO4: 0.02 part; mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0.02 part; water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps:
s1, activating glass powder: mixing the raw materialsAlkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with waste glass powder, putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder, wherein the hydrothermal treatment conditions are as follows: the hydrothermal treatment time is 2 hours at the temperature of 126 ℃ and the pressure of 0.143 MPa; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder (the average particle size is 75 mu m) after drying;
s2, preparation of waste glass mortar: and pouring the glass powder activated and ground in the step S1, ordinary portland cement and standard sand into a stirrer to be mixed and stirred for 200 seconds, then adding water, and continuing stirring for 400 seconds to obtain the physical-chemical-hydrothermal jointly activated waste glass mortar.
Example 5
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 1.575 parts; glass powder: 0.675 part; na (Na)2SO4: 0.02 part; mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0.02 part; water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps (without hydrothermal treatment):
s1, mixing the ordinary Portland cement, the standard sand and the glass powder according to a proportion, stirring for 200 seconds, and uniformly mixing to obtain a dry material component A;
s2, mixing Na2SO4Uniformly mixing the mixed alkali and water according to a proportion to obtain a mixed solution B;
and S3, pouring the dry material component A prepared in the S1 into the mixed solution B prepared in the S2, stirring for 400-500 seconds, and uniformly mixing to obtain the waste glass mortar activated by the physical-chemical combination.
Example 6
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 1.575 parts; glass powder: 0.675 part; na (Na)2SO4: 0 part of (C); mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0 part of (C); water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps:
s1, activating glass powder: mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with waste glass powder, putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder, wherein the hydrothermal treatment conditions are as follows: the hydrothermal treatment time is 2 hours at the temperature of 126 ℃ and the pressure of 0.143 MPa; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder (the average particle size is 75 mu m) after drying;
s2, preparation of waste glass mortar: and pouring the glass powder activated and ground in the step S1, ordinary portland cement and standard sand into a stirrer to be mixed and stirred for 200 seconds, then adding water, and continuing stirring for 400 seconds to obtain the physical-chemical-hydrothermal jointly activated waste glass mortar.
Example 7
The embodiment of the invention provides waste glass mortar which comprises the following components in parts by weight: ordinary portland cement: 1 part; standard sand: 2.205 parts; glass powder: 0.225 parts; na (Na)2SO4: 0.02 part; mixed base (sodium hydroxide: calcium hydroxide ═ 1: 1): 0.02 part; water: 0.47 part.
The preparation method of the waste glass mortar comprises the following steps:
s1, activating glass powder: mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with waste glass powder, putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder, wherein the hydrothermal treatment conditions are as follows: the hydrothermal treatment time is 2 hours at the temperature of 126 ℃ and the pressure of 0.143 MPa; putting the activated glass powder into a thermostat at 80 ℃ for drying, and grinding the glass powder into micro powder (the average particle size is 300 mu m) after drying;
s2, preparation of waste glass mortar: and pouring the glass powder activated and ground in the step S1, ordinary portland cement and standard sand into a stirrer to be mixed and stirred for 200 seconds, then adding water, and continuing stirring for 400 seconds to obtain the physical-chemical-hydrothermal jointly activated waste glass mortar.
Comparative example
The comparative mortar comprises the following components in percentage by weight: 1 part of ordinary Portland cement, 2.25 parts of standard sand and 0.47 part of water are mixed and stirred uniformly.
Test example 1
The waste glass mortar prepared in examples 1 to 7 was subjected to a compression test.
The waste glass mortar is made into a test block with the thickness of 50mm by 50mm,
refer to the standard of ordinary concrete mechanical property test method (GB/T50081-200):
Figure BDA0003288777480000061
in the formula:
Fcc-concrete test block compressive strength (MPa);
f, breaking load (N) of the test piece;
a-test piece pressure-bearing area (mm)2)。
The test procedure was as follows:
(1) the test piece is placed in front of the testing machine, and the surface of the test piece, the upper bearing plate surface and the lower bearing plate surface are wiped clean.
(2) And (3) placing the test piece on a lower pressing plate or a base plate of the testing machine by taking the side surface of the test piece during molding as a pressure-bearing surface, wherein the center of the test piece is aligned with the center of the lower pressing plate of the testing machine.
(3) And starting the testing machine, wherein the surface of the test piece is uniformly contacted with the upper and lower bearing plates or the steel base plate.
(4) The test process is continuously and uniformly loaded, and the loading speed is 0.5 Mpa/s.
Test example 2
The mortar prepared in examples 1 to 7 and comparative example was subjected to a bending test:
the waste glass mortar is made into a test block of 40mm by 160mm,
refer to the standard of ordinary concrete mechanical property test method (GB/T50081-200):
Figure BDA0003288777480000071
in the formula:
ftthe bending strength (Mpa) of the concrete test block is accurate to 0.1 Mpa;
f, breaking load (N) of the test piece;
l-span (mm) between supports;
b-the specimen cross-sectional width (mm);
h-the height (mm) of the section of the test piece.
The span is 160mm, and the section width and the section height of the test piece are 40 mm.
Test example 3
The mortar prepared in examples 1 to 7 and the comparative example is subjected to a rapid expansion rate test by a mortar-in-stick method:
the waste glass mortar is made into a test piece with 25mm by 280mm,
according to the "railroad industry standard of the people's republic of China" (TB/T2922.5-2002):
the length expansion rates of the test piece in different ages are obtained by periodically measuring the length of the test piece:
Figure BDA0003288777480000072
in the formula:
εtexpansion (%) of the test piece to the nearest 0.01% at age 14 d;
Lx-length of specimen at age 14d (mm);
l-length of specimen at 0d age (mm);
Δ -the length (mm) of the stylus.
The results of the compression test, the bending test and the expansion rate test of the waste glass mortar prepared in the embodiments 1 to 7 of the invention and the comparative example are shown in table 1.
TABLE 1
Figure BDA0003288777480000073
Figure BDA0003288777480000081
As can be seen from Table 1, the mortar obtained in example 4, which is the most excellent in overall strength and durability, has a 28d compressive strength of 36.50MPaMPa and a fracture morphology shown in FIG. 2; the bending strength is 9.72MPa, and the failure mode is shown in figure 3; the expansion rate was 0.0611%. From the test results, the compressive and flexural strengths of the mortar sample examples were increased over those of test example 1, and the expansion rate of the mortar was also below the specification threshold. As can be seen from the attached figure 1, more flocculent gelled substances are generated on the surfaces of the glass powder particles after the physical-chemical-hydrothermal combined excitation, which indicates that the glass powder is effectively activated, so that the compression and bending strength of the mortar is improved.
In comparison with the test data of example 1 and example 7, in the case of the same amount of chemical agent and both of them are subjected to hydrothermal treatment, the bending and compression strength of the mortar is improved and the expansion rate is reduced by adding 75 μm glass powder compared with 300. mu.m glass powder. The method shows that the waste glass is ball-milled to a certain particle size range, so that more active substances can be released, the specific surface area is increased, the secondary hydration reaction is promoted, the compressive strength of the mortar is improved, and the alkali aggregate reaction is inhibited.
Compared with the test data of the example 1 and the example 2, the test data of the example 4 and the test data of the example 5, under the condition that the mixing amount of the chemical agent is the same, the ASR reaction expansion rate of the mortar can be effectively reduced by carrying out the hydrothermal treatment. In comparison with the test data of example 1 and example 3, and in example 4 and example 6, when the hydrothermal treatment is carried out, the compressive and flexural strength of the mortar is improved by adding the chemical agent, because the silicic acid gel film formed by the reaction on the glass surface gradually thickens along with the progress of the reaction under the condition of insufficient alkali content, the reaction is prevented from further proceeding, the activity of the glass powder is not fully released, and the compressive and flexural strength of the mortar is reduced.
Compared with the experimental data of the example 1 and the example 4, the experimental data of the example 2 and the example 5, under the condition that the same amount of the chemical agent is added and the hydrothermal treatment is carried out, the replacement amount of the glass powder is increased, the breaking and compression strength of the mortar is improved, and the expansion rate is improved but is lower than the standard threshold value. This indicates that the chemical agent can be added in an appropriate amount to fully exert the activity of the glass frit without causing excessive alkali-aggregate reaction.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention, it should be noted that, for those skilled in the art, several modifications and decorations without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims (9)

1. The preparation method of the waste glass mortar is characterized by comprising the following steps:
s1, activating glass powder:
mixing alkali with Na2SO4Uniformly mixing, then uniformly mixing the glass powder with the waste glass powder, and putting the mixture into a high-pressure kettle for hydrothermal treatment to complete the activation of the glass powder; putting the activated glass powder into a thermostat for drying, and grinding the glass powder into micro powder after drying;
s2, preparation of waste glass mortar:
and (4) pouring the glass powder activated and ground in the step (S1), ordinary portland cement and standard sand into a stirrer for mixing and stirring, then adding water, and continuing stirring to obtain the physical-chemical-hydrothermal combined activated waste glass mortar.
2. The method for preparing waste glass mortar according to claim 1, wherein the ordinary portland cement, standard sand, glass frit, Na2SO4And the mass ratio of the mixed alkali to the water is 1: (1.575-2.025):
(0.225～0.675)：(0～0.06)：(0～0.06)：0.47。
3. the method for preparing a waste glass mortar according to claim 2, wherein the mixed alkali is a mixture of sodium hydroxide and calcium hydroxide, and the mixing ratio of the sodium hydroxide to the calcium hydroxide is 1: 1.
4. The method for producing waste glass mortar according to claim 1, wherein in S1, the average particle size of the activated and ground glass frit is 75 to 300 μm.
5. The method for producing a waste glass mortar according to claim 1, wherein in S1, the hydrothermal treatment conditions are: the hydrothermal treatment time is 2 hours at 126 ℃ and 0.143 MPa.
6. The preparation method of the waste glass mortar according to claim 1, wherein in S2, the activated and ground glass powder, ordinary portland cement and standard sand are mixed and stirred in a stirrer for 200-300 seconds; and (4) continuously stirring for 400-500 seconds after adding water.
7. The method for producing a waste glass mortar as claimed in claim 1, wherein after the production of the waste glass mortar is completed, a cubic axial compressive strength test, a bending strength test and an ASR reaction expansion ratio test are performed.
8. The method for preparing a waste glass mortar according to claim 7, wherein the compression strength test makes the mortar into test pieces of 50mm x 50mm, the bending strength test makes the mortar into test pieces of 40mm x 160mm, and the expansion ratio test makes the mortar into test pieces of 25mm x 280 mm.
9. A waste glass mortar produced by the production method according to any one of claims 1 to 8.
CN202111157341.6A 2021-09-30 2021-09-30 Preparation method of waste glass mortar and waste glass mortar Withdrawn CN113880515A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114853401A (en) * 2022-04-19 2022-08-05 深圳市锦昊辉实业发展有限公司 Preparation method of glass powder concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114853401A (en) * 2022-04-19 2022-08-05 深圳市锦昊辉实业发展有限公司 Preparation method of glass powder concrete

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Application publication date: 20220104