CN114455923A - Cement mortar with anti-permeation function for reinforcing polymer structure - Google Patents
Cement mortar with anti-permeation function for reinforcing polymer structure Download PDFInfo
- Publication number
- CN114455923A CN114455923A CN202210317721.XA CN202210317721A CN114455923A CN 114455923 A CN114455923 A CN 114455923A CN 202210317721 A CN202210317721 A CN 202210317721A CN 114455923 A CN114455923 A CN 114455923A
- Authority
- CN
- China
- Prior art keywords
- parts
- cement mortar
- composite material
- reinforcing
- cement
- 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
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 41
- 239000011083 cement mortar Substances 0.000 title claims abstract description 36
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 24
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 59
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000010457 zeolite Substances 0.000 claims abstract description 59
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 44
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 44
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 44
- 239000002131 composite material Substances 0.000 claims abstract description 39
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims abstract description 36
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000004471 Glycine Substances 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910001051 Magnalium Inorganic materials 0.000 claims abstract description 11
- 238000011065 in-situ storage Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 28
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 22
- 239000007864 aqueous solution Substances 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 16
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 15
- 235000010344 sodium nitrate Nutrition 0.000 claims description 11
- 239000004317 sodium nitrate Substances 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000003487 anti-permeability effect Effects 0.000 abstract description 7
- 239000004570 mortar (masonry) Substances 0.000 description 15
- 239000011148 porous material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011433 polymer cement mortar Substances 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229920000891 common polymer Polymers 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 nitrate ions Chemical class 0.000 description 1
- 239000006179 pH buffering agent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 230000002195 synergetic effect Effects 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses cement mortar with an anti-permeation function for reinforcing a polymer structure, which comprises the following components in parts by weight: 30-50 parts of cement, 60-100 parts of sand, 1-2 parts of polymer powder, 3-5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.1-0.5 part of glycine, 0.01-0.03 part of triethanolamine and 20-30 parts of water; the magnalium hydrotalcite/zeolite composite material is a composite material formed by taking zeolite powder as a base material and growing magnalium hydrotalcite materials on the surface in situ. The cement mortar for reinforcing the polymer structure not only has good mechanical property, but also has good anti-permeability performance.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to cement mortar with an anti-permeation function for reinforcing a polymer structure.
Background
It is known that any building structure itself has a certain service life, and once the service life is exceeded, the material aging or damage can have a great influence on the safety, durability and applicability of the building structure, so that the building structure needs to be reinforced regularly. The common polymer modified mortar not only has the characteristics of high strength, good durability, good ageing resistance and the like of cement-based materials, but also has higher bonding strength, good toughness, good impact resistance and the like. Polymer cement mortar is widely used in the reinforcement of building structural members.
The polymer cement mortar is an organic-inorganic composite material formed by mixing cement and polymer serving as a cementing material together with sand and water, and has special properties. The mortar has good impermeability, crack resistance and high compressive and flexural strength, and has good cohesiveness with concrete, mainly because the polymer plays an important role in a cement mortar matrix, the polymer can form a space net structure in the matrix and fill the pores between the cement mortar and sand, thereby improving the strength of the cement mortar and improving the toughness of common cement mortar. The existing polymer cement mortar needs to add a large amount of polymer to fully exert the performance, and the anti-permeability performance, the mechanical property and the like of the mortar need to be further improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the cement mortar with the anti-permeability function for reinforcing the polymer structure is provided, and the cement mortar not only has good mechanical property, but also has good anti-permeability performance.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
30-50 parts of cement, 60-100 parts of sand, 1-2 parts of polymer powder, 3-5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.1-0.5 part of glycine, 0.01-0.03 part of triethanolamine and 20-30 parts of water;
the magnalium hydrotalcite/zeolite composite material is a composite material formed by taking zeolite powder as a base material and growing magnalium hydrotalcite materials on the surface in situ.
Preferably, the cement is P II52.5R Portland cement with a bulk density of 700kg/m3The average grain diameter is less than or equal to 160 mu m; the sand is natural river sand, and the fineness modulus is 2.8.
Preferably, the polymer powder is one or a mixture of two of styrene-acrylic polymer and ethylene-vinyl acetate copolymer.
In order to better solve the technical problems, the invention also provides the following technical scheme:
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
mixing zeolite powder and deionized water to prepare a dispersion liquid, adding sodium nitrate, continuously stirring, dropwise adding a mixed aqueous solution consisting of magnesium nitrate and aluminum nitrate at a certain speed under vigorous stirring, dropwise adding a sodium hydroxide solution to adjust the pH value of the solution, continuously stirring after the dropwise adding is finished, centrifuging, re-dispersing the solid obtained by centrifuging, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnesium-aluminum hydrotalcite/zeolite composite material.
Preferably, the zeolite powder is LTA type zeolite powder, the average particle size of the LTA type zeolite powder is 1mm, and the specific surface area of the LTA type zeolite powder is 11-12m2/g。
Preferably, in the above technical solution, the mass ratio of the zeolite powder to the sodium nitrate is 1: (0.7-0.9).
Preferably, the mass concentrations of magnesium nitrate and aluminum nitrate in the mixed aqueous solution are respectively 0.006-0.008g/ml and 0.008-0.01g/ml, and the mass ratio of the mixed aqueous solution to the zeolite powder is (190-200): 1.
preferably, the dropping speed of the mixed aqueous solution is 55-60 ml/h.
Preferably, the concentration of the sodium hydroxide solution is 1mol/L, and the pH of the solution is adjusted to 8-9.
Preferably, the time for continuing the stirring treatment is 1-2h, and the stirring speed is 3000-.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the cement mortar with the anti-permeation function for reinforcing the polymer structure comprises cement, sand, polymer powder, a magnesium aluminum hydrotalcite/zeolite composite material, glycine, triethanolamine and water, wherein after the polymer is added into the cement mortar, a formed flexible reticular glue film structure can effectively improve the bonding performance of a cement cementing material and aggregate, and effectively improve the strength and the anti-permeation performance of the cement mortar. The magnesium-aluminum hydrotalcite/zeolite composite material with a proper amount is added into the cement mortar, so that the dispersibility is good, the mortar pores can be effectively filled in the cement hydration process, the compactness of the mortar is improved, and the anti-permeability performance of the mortar is further improved. Triethanolamine and glycine are used as ion complexing agents and can be added into cement for hydration reaction, but the types of ions of the triethanolamine and the glycine are different and can be mutually compensated; the triethanolamine is a high-quality ion complexing agent for high-calcium ion complexing, and the glycine can also be used as a pH buffering agent to adjust the action environment, so that the complexing environment of the triethanolamine is ensured to the maximum extent. The triethanolamine and the glycine are matched with each other, so that the generation and the expansion of pores and microcracks can be effectively prevented, and the durability of the cement mortar is further improved. In addition, the triethanolamine and the glycine can effectively promote the hydration of cement, form CH and C-S-H gel, refine pores, and improve the density of a cement matrix, thereby increasing the anti-permeability performance of cement mortar.
When the magnalium hydrotalcite/zeolite composite material is prepared, in order to insert nitrate ions into the interlayer of the hydrotalcite material, a certain amount of sodium nitrate is firstly added into the zeolite dispersion liquid, then mixed metal ion solution is added at a certain speed, then sodium hydroxide solution is added for precipitation, and the precipitated magnalium hydrotalcite material is stacked on the surface of zeolite, so that the magnalium hydrotalcite/zeolite composite material has high dispersibility and large specific surface area, can effectively fill the pores of mortar, and improves the anti-permeability performance of the mortar.
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
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
45 parts of cement, 88 parts of sand, 2 parts of styrene-acrylic polymer, 4 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.5 part of glycine, 0.03 part of triethanolamine and 20 parts of water;
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2The/g LTA zeolite powder was mixed with 100ml deionized water to prepare a dispersionThen 0.7g of sodium nitrate is added to continue stirring for 30min, 190ml of mixed aqueous solution consisting of magnesium nitrate and aluminum nitrate is dropwise added at the speed of 60ml/h under vigorous stirring, the mass concentrations of the magnesium nitrate and the aluminum nitrate in the mixed aqueous solution are respectively 0.006g/ml and 0.008g/ml, then 1mol/L of sodium hydroxide solution is dropwise added to adjust the pH value of the solution to 8-9, stirring treatment is continued at the rotating speed of 3000 rpm for 1h after dropwise addition is finished, then centrifugation is carried out, the solid obtained by centrifugation is re-dispersed, the operation is repeated for 2-3 times, and finally the solid is dried to prepare the magnalium hydrotalcite/zeolite composite material.
Example 2
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
46 parts of cement, 90 parts of sand, 2 parts of styrene-acrylic polymer, 5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.5 part of glycine, 0.02 part of triethanolamine and 22 parts of water;
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2Mixing LTA type zeolite powder per gram with 100ml of deionized water to prepare a dispersion liquid, adding 0.9g of sodium nitrate, continuously stirring for 30min, dropwise adding 200ml of a mixed aqueous solution consisting of magnesium nitrate and aluminum nitrate at the speed of 60ml/h under vigorous stirring, wherein the mass concentrations of the magnesium nitrate and the aluminum nitrate in the mixed aqueous solution are 0.008g/ml and 0.01g/ml respectively, dropwise adding 1mol/L of sodium hydroxide solution to adjust the pH of the solution to 8-9, continuously stirring at the rotating speed of 5000 r/min for 2h after dropwise adding is finished, centrifuging, re-dispersing the centrifuged solid, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnesium aluminum hydrotalcite/zeolite composite material.
Example 3
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
47 parts of cement, 90 parts of sand, 1.8 parts of styrene-acrylic polymer, 4.5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.4 part of glycine, 0.03 part of triethanolamine and 30 parts of water;
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2Mixing LTA type zeolite powder per gram with 100ml of deionized water to prepare a dispersion liquid, adding 0.8g of sodium nitrate, continuously stirring for 30min, dropwise adding 200ml of a mixed aqueous solution consisting of magnesium nitrate and aluminum nitrate at the speed of 60ml/h under vigorous stirring, wherein the mass concentrations of the magnesium nitrate and the aluminum nitrate in the mixed aqueous solution are 0.006g/ml and 0.01g/ml respectively, dropwise adding 1mol/L of sodium hydroxide solution to adjust the pH of the solution to 8-9, continuously stirring at the rotating speed of 4000 rpm after dropwise adding for 1.5h, centrifuging, re-dispersing the solid obtained by centrifuging, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnesium aluminum hydrotalcite/zeolite composite material.
Example 4
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
45 parts of cement, 90 parts of sand, 2 parts of styrene-acrylic polymer, 4.5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.5 part of glycine, 0.03 part of triethanolamine and 20 parts of water;
the preparation method of the magnesium-aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2Mixing LTA type zeolite powder per gram with 100ml of deionized water to prepare a dispersion, adding 0.85g of sodium nitrate, continuously stirring for 30min, dropwise adding a mixed aqueous solution consisting of 195ml of magnesium nitrate and aluminum nitrate at the speed of 60ml/h under vigorous stirring, wherein the mass concentrations of the magnesium nitrate and the aluminum nitrate in the mixed aqueous solution are 0.007g/ml and 0.009g/ml respectively, dropwise adding a sodium hydroxide solution with the concentration of 1mol/L to adjust the pH of the solution to 8-9, continuously stirring for 1h at the rotating speed of 4500 rpm after dropwise adding, centrifuging, re-dispersing the centrifuged solid, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnesium aluminum hydrotalcite/zeolite composite material.
Example 5
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
46 parts of cement, 88 parts of sand, 1.5 parts of ethylene-vinyl acetate copolymer, 4.5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.5 part of glycine, 0.03 part of triethanolamine and 20 parts of water;
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2Mixing LTA type zeolite powder per gram with 100ml of deionized water to prepare a dispersion liquid, adding 0.75g of sodium nitrate, continuously stirring for 30min, then dropwise adding a mixed aqueous solution consisting of 195L of magnesium nitrate and aluminum nitrate at the speed of 60ml/h under vigorous stirring, wherein the mass concentrations of the magnesium nitrate and the aluminum nitrate in the mixed aqueous solution are 0.007g/ml and 0.009g/ml respectively, then dropwise adding a sodium hydroxide solution at the concentration of 1mol/L to adjust the pH of the solution to 8-9, continuously stirring at the rotating speed of 4500 r/min for 2h after dropwise adding is finished, then centrifuging, re-dispersing the solid obtained by centrifuging, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnalium hydrotalcite/zeolite composite material.
Example 6
The cement mortar with the anti-permeation function for reinforcing the polymer structure comprises the following components in parts by weight:
45 parts of cement, 90 parts of sand, 2 parts of ethylene-vinyl acetate copolymer, 4.5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.45 part of glycine, 0.03 part of triethanolamine and 20 parts of water;
the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
1g of a polymer having an average particle diameter of 1mm and a specific surface area of 11.5m2Mixing LTA type zeolite powder per gram with deionized water 100ml to obtain dispersion, adding sodium nitrate 0.8g, stirring for 30min, adding mixed water solution of magnesium nitrate 195ml and aluminum nitrate 0.008g/ml and 0.01g/ml while stirring vigorously at 60ml/h, adding sodium hydroxide 1mol/L to adjust pH to 8-9, and adding waterAnd after the addition is finished, continuously stirring at the rotating speed of 4500 rpm for 2 hours, then centrifuging, re-dispersing the solid obtained by centrifuging, repeating the process for 2-3 times, and finally drying the solid to obtain the magnesium-aluminum hydrotalcite/zeolite composite material.
Comparative example 1
Magnesium aluminum hydrotalcite material was added instead of magnesium aluminum hydrotalcite zeolite composite material, and other conditions were the same as in example 6.
Comparative example 2
The conditions were otherwise the same as in example 6, without the addition of triethanolamine.
Comparative example 3
Glycine was not added, and other conditions were the same as in example 6.
The properties of the mortars in the above examples and comparative examples were tested, and the test methods and test results are shown below.
The mortar impermeability is tested according to the impermeability performance method specified in JGJ/T70-2009 Standard test method for basic performance of building mortar, the mortar strength is tested according to GB/T17671-1999 method for testing cement mortar strength, and the test results are shown in Table 1.
TABLE 1
From the test results, compared with the pure magnesium-aluminum hydrotalcite material, the magnesium-aluminum hydrotalcite/zeolite composite material added in the invention can effectively improve the strength and the impermeability of the mortar to a certain extent, mainly because the magnesium-aluminum hydrotalcite/zeolite composite material has good dispersibility and large specific surface area, can effectively fill the pores of the mortar and increase the compactness of the mortar, and the test shows that the specific surface area of the pure magnesium-aluminum hydrotalcite material is 15.7m2The specific surface area of the magnesium aluminum hydrotalcite/zeolite composite material is as high as 142.1m2(iv) g. Compared with single addition of glycine or single addition of triethanolamine, the synergistic addition of glycine and triethanolamine can better improve the performance of cement mortar.
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 (10)
1. The cement mortar with the anti-permeation function for reinforcing the polymer structure is characterized by comprising the following components in parts by weight:
30-50 parts of cement, 60-100 parts of sand, 1-2 parts of polymer powder, 3-5 parts of magnesium aluminum hydrotalcite/zeolite composite material, 0.1-0.5 part of glycine, 0.01-0.03 part of triethanolamine and 20-30 parts of water;
the magnalium hydrotalcite/zeolite composite material is a composite material formed by taking zeolite powder as a base material and growing magnalium hydrotalcite materials on the surface in situ.
2. The cement mortar for reinforcing polymer structures having permeation resistant function according to claim 1, wherein the cement is P II52.5R portland cement having a bulk density of 700kg/m3The average grain diameter is less than or equal to 160 mu m; the sand is natural river sand, and the fineness modulus is 2.8.
3. The cement mortar for reinforcing polymer structures having permeation resistant function according to claim 1, wherein the polymer powder is one or a mixture of two of styrene-acrylic polymer and ethylene-vinyl acetate copolymer.
4. The cement mortar for reinforcing polymer structure with permeation resistant function according to claim 1, wherein the preparation method of the magnesium aluminum hydrotalcite/zeolite composite material comprises the following steps:
mixing zeolite powder and deionized water to prepare a dispersion liquid, adding sodium nitrate, continuously stirring, dropwise adding a mixed aqueous solution consisting of magnesium nitrate and aluminum nitrate at a certain speed under vigorous stirring, dropwise adding a sodium hydroxide solution to adjust the pH value of the solution, continuously stirring after the dropwise adding is finished, centrifuging, re-dispersing the solid obtained by centrifuging, repeating the steps for 2-3 times, and finally drying the solid to prepare the magnesium-aluminum hydrotalcite/zeolite composite material.
5. The cement mortar for reinforcing polymer structure having permeation resistant function according to claim 4, wherein the zeolite powder is LTA type zeolite powder having an average particle size of 1mm and a specific surface area of 11 to 12m2/g。
6. The cement mortar for reinforcing a polymer structure having a permeation resistant function according to claim 4, wherein the mass ratio of the zeolite powder to sodium nitrate is 1: (0.7-0.9).
7. The cement mortar with permeation resistance for reinforcing polymer structure as claimed in claim 4, wherein the mass concentrations of magnesium nitrate and aluminum nitrate in the mixed aqueous solution are 0.006-0.008g/ml and 0.008-0.01g/ml, respectively, and the mass ratio of the mixed aqueous solution to zeolite powder is (190-200): 1.
8. the cement mortar for reinforcing polymer structures having permeation resistant function according to claim 4, wherein the dropping speed of the mixed aqueous solution is 55 to 60 ml/h.
9. The cement mortar for reinforcing polymer structures having permeation resistant function according to claim 4, wherein the concentration of the sodium hydroxide solution is 1mol/L, and the pH of the solution is adjusted to 8 to 9.
10. The cement mortar for reinforcing polymer structure with permeation resistant function according to claim 4, wherein the time for the continuous stirring treatment is 1-2h, and the stirring rotation speed is 3000-5000 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210317721.XA CN114455923A (en) | 2022-03-29 | 2022-03-29 | Cement mortar with anti-permeation function for reinforcing polymer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210317721.XA CN114455923A (en) | 2022-03-29 | 2022-03-29 | Cement mortar with anti-permeation function for reinforcing polymer structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114455923A true CN114455923A (en) | 2022-05-10 |
Family
ID=81418360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210317721.XA Pending CN114455923A (en) | 2022-03-29 | 2022-03-29 | Cement mortar with anti-permeation function for reinforcing polymer structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114455923A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857416A (en) * | 2010-06-13 | 2010-10-13 | 中国建筑材料科学研究总院 | Polymer emulsion modified rapid repair mortar and preparation method thereof |
| CN107935432A (en) * | 2017-11-28 | 2018-04-20 | 湖北腾辰科技股份有限公司 | A kind of new organic-inorganic acid synthesis alkali-free quick-coagulant and preparation method thereof |
| CN111892341A (en) * | 2020-08-12 | 2020-11-06 | 黄志芳 | Corrosion-resistant composite cement and preparation process thereof |
| CN112777959A (en) * | 2021-01-06 | 2021-05-11 | 北京建筑材料科学研究总院有限公司 | Modified hydrotalcite and preparation method and application thereof |
-
2022
- 2022-03-29 CN CN202210317721.XA patent/CN114455923A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857416A (en) * | 2010-06-13 | 2010-10-13 | 中国建筑材料科学研究总院 | Polymer emulsion modified rapid repair mortar and preparation method thereof |
| CN107935432A (en) * | 2017-11-28 | 2018-04-20 | 湖北腾辰科技股份有限公司 | A kind of new organic-inorganic acid synthesis alkali-free quick-coagulant and preparation method thereof |
| CN111892341A (en) * | 2020-08-12 | 2020-11-06 | 黄志芳 | Corrosion-resistant composite cement and preparation process thereof |
| CN112777959A (en) * | 2021-01-06 | 2021-05-11 | 北京建筑材料科学研究总院有限公司 | Modified hydrotalcite and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈正 主编: "《土木工程材料》", 30 April 2020, 机械工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2931056T3 (en) | Accelerator additive for hydraulic compositions | |
| EP2334615A2 (en) | Composition containing a hydraulic and/or pozzolan material | |
| CN111807779B (en) | High-strength waterproof soil consolidation agent | |
| CN112279590A (en) | Sulfate erosion resistant concrete and preparation method thereof | |
| CN115806407A (en) | Calcium oxide filler for aerated bricks and production process thereof | |
| CN114455923A (en) | Cement mortar with anti-permeation function for reinforcing polymer structure | |
| CN115536307B (en) | Admixture for high-permeability-resistance marine concrete and preparation method thereof | |
| CN1223235A (en) | Improved processing additives for hydraulic cements | |
| CN114920890B (en) | Viscosity-reducing additive and preparation method and application thereof | |
| CN113429134B (en) | Method for adjusting fluidity and setting time of chemically-activated cementing material system | |
| CN112745083B (en) | Barite weight-balance concrete and preparation method thereof | |
| CN110171940B (en) | Coral sand admixture and preparation method and application thereof | |
| CN112521042B (en) | Additive for improving strength and corrosion resistance of concrete and preparation method thereof | |
| CN115159924A (en) | Underwater undispersed concrete and preparation method thereof | |
| CN106966643A (en) | Jacking concrete filled steel tube and preparation method thereof | |
| CN109704632A (en) | A kind of concrete anti-seepage antimitotic agent and preparation method thereof | |
| CN114956712B (en) | LC40 full-light pumping ceramsite concrete and preparation method thereof | |
| CN115594435B (en) | Modified lignin dispersing agent material and preparation method and application thereof | |
| RU2729634C2 (en) | Dry construction mixture | |
| CN108558242B (en) | Cement for underwater engineering | |
| CN115259740A (en) | Additive for light ceramsite concrete and preparation method thereof | |
| WO2003018505A2 (en) | Admixture for cementitious compositions and process for preparation thereof | |
| CN111646765B (en) | Crack-resistant mortar with few pores and preparation method thereof | |
| CN117819894A (en) | Preparation method and application of anti-cracking impervious waterproof concrete | |
| RU2319721C2 (en) | Polymer-cement grouting mortar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220829 Address after: 317000 Dayang wukong'ao village, Linhai City, Taizhou City, Zhejiang Province Applicant after: Linhai Zhongxin new building materials Co.,Ltd. Address before: 317000 wukong'ao village, Dayang office, Linhai City, Taizhou City, Zhejiang Province Applicant before: ZHEJIANG ZHONGXIN NEW BUILDING MATERIALS Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220510 |
|
| RJ01 | Rejection of invention patent application after publication |