CN112390615A - Inorganic wall fixing material and preparation method thereof - Google Patents

Inorganic wall fixing material and preparation method thereof Download PDF

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Publication number
CN112390615A
CN112390615A CN202011293274.6A CN202011293274A CN112390615A CN 112390615 A CN112390615 A CN 112390615A CN 202011293274 A CN202011293274 A CN 202011293274A CN 112390615 A CN112390615 A CN 112390615A
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parts
fixing material
mixture
inorganic wall
inorganic
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CN202011293274.6A
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CN112390615B (en
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刘研研
王化
田兴友
李云
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Hefei Institutes of Physical Science of CAS
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Hefei Institutes of Physical Science of CAS
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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
    • C04B28/34—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 cold phosphate binders
    • 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
    • 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
    • C04B2111/29—Frost-thaw resistance
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires

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  • 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)
  • Finishing Walls (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses an inorganic wall fixing material and a preparation method thereof, wherein the inorganic wall fixing material comprises the following raw materials in parts by mass: 40-70 parts of metal oxide, 4-20 parts of borate, 7-15 parts of dihydric phosphate, 5-25 parts of fine sand stone, 5-25 parts of chopped fiber, 1-5 parts of carbonate and 1-5 parts of weak acid. The wall fixing material obtained by the invention can be applied to fixing different types of wall materials, and the tensile strengths of the inorganic material fixing foam insulation board, granite and marble after 7d are respectively 0.42MPa, 0.40MPa and 0.40 MPa.

Description

Inorganic wall fixing material and preparation method thereof
Technical Field
The invention relates to a wall fixing material and a preparation method thereof, in particular to an inorganic wall fixing material and a preparation method thereof.
Background
With the development of wall-bonded green buildings, great attention is paid to the research on wall-fixed green building materials. As a building product with wide application, the performance of the cement bonding mortar is continuously improved along with the development of modern building materials. The common cement mortar is a typical brittle material, and has low compressive strength, breaking strength and bonding property, poor toughness and easy cracking. In patent No. CN201810726247, a bonding mortar for exterior wall thermal insulation of a phenolic foam board is prepared from sulphoaluminate cement, quartz sand, zeolite powder, cellulose ether, a retarder and ethylene-vinyl acetate rubber powder. Cellulose ether, rubber powder and the like in the preparation scheme belong to organic raw materials, when sulphoaluminate cement is modified, the traditional wall fixing and bonding mortar is easy to crack under the influence of temperature during construction in cold seasons, and the condition that an external heat insulation board is torn due to cracking of the wall is also generated after construction. In addition, the setting time of the traditional wall fixing and bonding mortar is relatively long, the construction period is prolonged, and the construction cost is not reduced. Therefore, the research and development of a novel and purely inorganic wall fixing material are key work in the field of wall fixing.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an inorganic wall fixing material and a preparation method thereof. The inorganic wall fixing material has good compatibility with the wall, is green and environment-friendly, and is convenient and fast to construct.
The inorganic wall fixing material comprises the following raw materials in parts by weight:
40-70 parts of metal oxide, 4-20 parts of borate, 7-15 parts of dihydric phosphate, 5-25 parts of fine sand stone, 5-25 parts of chopped fiber, 1-5 parts of carbonate and 1-5 parts of weak acid.
The particle size of the metal oxide is 0.3-0.5mm, the particle size of the borate is 0.3mm, the particle size of the dihydric phosphate is 0.3mm, the particle size of the fine sand stone is 100 mu m, the length of the chopped fiber is 50 mu m, and the particle size of the carbonate is 0.3 mm.
Further, the metal oxide is one or a mixture of more than two of magnesium oxide and calcium oxide.
Further, the borate is sodium tetraborate.
Further, the dihydric phosphate is one or a mixture of more than two of sodium dihydrogen phosphate and ammonium dihydrogen phosphate.
Further, the chopped fibers are glass fibers.
Further, the carbonate is one or a mixture of more than two of calcium carbonate and magnesium carbonate.
Further, the weak acid is one or a mixture of two or more of citric acid, acetic acid, oxalic acid and phosphoric acid.
The preparation method of the inorganic wall fixing material comprises the following steps:
step 1: metal oxide, borate, dihydric phosphate, fine sand and chopped fiber are mixed according to the mass ratio of 40-70: 4-20: 7-15: 5-25: 5-25, and stirring for 3-5min at 40-60r/min to obtain a mixture A;
step 2: adding water into the mixture A, stirring for 18-22s, adding weak acid into the mixture A, and continuously stirring for 20-25s, wherein the mass ratio of the water to the weak acid to the mixture A is 10-16: 1-3: 61-155 to obtain intermediate product B;
and step 3: adding carbonate into the intermediate product B, and continuously stirring for 20-25s, wherein the weight ratio of the carbonate to the inorganic acid in the intermediate product B is 2:3, so as to obtain the inorganic wall fixing material. The obtained inorganic wall fixing material is placed on a bonding plate to be paved and put on a wall, the support frame is removed within 5min, and the tensile strength of the inorganic wall fixing material is tested after 7 d.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the invention takes the acid-base complexation of metal oxide and acid salt to generate crystallization hydration reaction as the theoretical basis, utilizes the reaction of metal oxide and phosphate to generate the gelled material with early strength, low temperature resistance and excellent bonding performance, simultaneously adds inorganic acid and carbonate, and utilizes the acid-base excitation principle to obtain different curing time, thereby obtaining the curing schemes of different plates.
Secondly, the prepared target product is used as a wall fixing material and detected by a third-party detection mechanism (Q/ZJZY07-2014), and the target product has excellent compatibility, durability, freezing prevention, crack prevention and environmental protection no matter the target product is a fixed heat-insulation foam board, granite and marble board. After the inorganic wall fixing material is maintained for 7 days at the temperature of 5-7 ℃ outdoors, the tensile strengths of the inorganic wall fixing material, the foam insulation board, the granite and the marble are respectively measured to be 0.42MPa, 0.40MPa and 0.40 MPa.
Thirdly, the construction time is short, the support can be removed within 5min after the plates are placed on the wall, and in addition, the inorganic wall fixing material can be used for bonding large-size plates to replace the traditional dry hanging construction mode with low efficiency and poor safety.
Drawings
FIG. 1 is a curing diagram of inorganic wall fixing material fixing plates of different sizes and materials at zero-below-zero-5-7 ℃ outdoors.
FIG. 2 is a diagram showing the tensile strength test of inorganic wall fixing material after being cured for 7 days at-5 to-7 ℃.
Fig. 3 is a fracture surface of the inorganic wall fixing material and the plate after the tensile test is finished, and the graph can show that the inorganic wall fixing material and the cement wall have good compatibility and fixing performance.
Detailed Description
Example 1:
1. respectively weighing 40 parts by weight of magnesium oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of sodium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fiber, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 1 part of oxalic acid into the mixture A, and continuously stirring for 20s to obtain an intermediate product B;
3. and adding 0.6 part of magnesium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 2min, and curing for 7d at-5-7 ℃ outdoors to obtain the inorganic wall fixing material with the tensile strength of 0.30 MPa.
Example 2:
1. respectively weighing 40 parts by weight of calcium metal oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of sodium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fibers, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 1 part of oxalic acid into the mixture A, and continuously stirring for 20s to obtain an intermediate product B;
3. and adding 0.6 part of magnesium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 5min, and curing for 7d at minus 5-7 ℃ outdoors to obtain the inorganic wall fixing material with the tensile strength of 0.15 MPa.
Example 3:
1. respectively weighing 40 parts by weight of metal magnesium oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of ammonium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fibers, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 1 part of oxalic acid into the mixture A, and continuously stirring for 20s to obtain an intermediate product B;
3. and adding 0.6 part of magnesium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 3min, and curing for 7d at-5-7 ℃ outdoors to obtain the inorganic wall fixing material with the tensile strength of 0.35 MPa.
Example 4:
1. respectively weighing 40 parts by weight of magnesium oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of sodium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fiber, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 1 part of oxalic acid into the mixture A, and continuously stirring for 20s to obtain an intermediate product B;
3. and adding 0.6 part of magnesium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 2min, and curing for 7d at-5-7 ℃ outdoors to obtain the inorganic wall fixing material with the tensile strength of 0.40 MPa.
Example 5:
1. respectively weighing 40 parts by weight of magnesium oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of sodium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fiber, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 1 part of citric acid into the mixture A, and continuously stirring for 25s to obtain an intermediate product B;
3. and adding 0.6 part of magnesium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 5min, and curing the marble plate at the outdoor temperature of-5 ℃ for 7d to obtain the inorganic wall fixing material with the tensile strength of 0.42 MPa.
Example 6:
1. respectively weighing 40 parts by weight of magnesium oxide, 4 parts by weight of sodium tetraborate, 7 parts by weight of sodium dihydrogen phosphate, 5 parts by weight of fine sand stone and 5 parts by weight of chopped fiber, mixing, and stirring for 3-5min at a stirring speed of 40-60r/min to obtain a mixture A;
2. adding 10 parts of water into the mixture A, stirring for 20s, adding 2 parts of oxalic acid into the mixture A, and continuously stirring for 20s to obtain an intermediate product B;
3. and adding 1.3 parts of calcium carbonate into the intermediate product B, continuously stirring for 25s to obtain an inorganic wall fixing material, placing the inorganic wall fixing material on a marble plate, paving and mounting the marble plate, removing the support frame within 5min, and curing the marble plate at the outdoor temperature of-5 ℃ for 7d to obtain the inorganic wall fixing material with the tensile strength of 0.40 MPa.
In examples 1 to 3, the effects of different metal oxides and phosphates on the strength of the inorganic wall fixing material for fixing marble and the removal time of the construction support are considered, and the bonding strength after 7 days and the removal time of the support during construction are as follows:
metal oxides Phosphate salts 7d bond strength Time of stent removal
Magnesium oxide Sodium dihydrogen phosphate 0.3MPa 2min
Calcium oxide Sodium dihydrogen phosphate 0.15MPa 5min
Magnesium oxide Ammonium dihydrogen phosphate 0.35MPa 3im
The magnesium oxide and the calcium oxide in the metal oxide have different fixing strength and time for the obtained wall fixing material, because the structure of the crystal hydrate generated by acid-base complexation reaction of the metal calcium oxide and the sodium dihydrogen phosphate is different from the structure of the crystal hydrate generated by acid-base complexation reaction of the magnesium oxide and the sodium dihydrogen phosphate, and the structure of the crystal hydrate generated by the calcium oxide is not compact enough and is easy to be influenced by the external environment, so that the structure is displaced, the fixing strength is reduced, and the coagulation time is long. In the process of preparing the inorganic wall fixing material, the ammonium dihydrogen phosphate and the sodium dihydrogen phosphate can provide an acidic environment for the inorganic wall fixing material, so that the metal oxide is dissolved, the metal ions can be resolved, conditions are provided for reaction, and the ammonium dihydrogen phosphate reacts with the metal ions to produce a crystalline hydrate, but other irritative ammonia gas is released in the reaction process, and the environment protection is not facilitated.
Examples 4-6 the effect of different stimulators on the strength of the inorganic wall fixing material to fix marble and the time for removing the construction scaffold was examined. The bonding strength after 7d and the removal time of the support frame during construction are as follows:
exciting agent 7d bond strength Time of stent removal
Magnesium carbonate + oxalic acid 0.40MPa 2min
Magnesium carbonate + citric acid 0.42MPa 3min
Calcium carbonate + oxalic acid 0.40MPa 5mim
Through different acid-base excitations, obtain different curing time's preparation scheme, inorganic wall body fixed material is different to granite board, marble panel, foam insulation board's tensile strength, and support removal time is different, this is because in the excitant-COOH complexes metal oxide at first in inorganic wall body solidified material's the formation process, forms unstable complex, and the formation of this complex greatly influences the concentration of metal ion in the liquid phase, thereby postpones the formation of crystallization hydrate, produces the retardation, thereby leads to support removal time to increase. Theoretically, 3-COOH exist in one citric acid molecule, 2-COOH exist in one oxalic acid molecule, but because the combination of magnesium carbonate and citric acid serving as an activator enables magnesium provided by the activator to participate in the generation of crystal hydrate, the number of hexahydrate is increased, and therefore the bonding and fixing strength is higher than that of the combination of calcium carbonate and oxalic acid. Calcium carbonate in the activator is more easily complexed with-COOH, so the removal time of the magnesium carbonate + oxalic acid combined stent is shorter than that of the calcium carbonate + oxalic acid combined stent.
It should be understood by those skilled in the art that the foregoing is only illustrative of several embodiments of the invention, and not of all embodiments. It should be noted that many variations and modifications are possible to those skilled in the art, and all variations and modifications that do not depart from the gist of the invention are intended to be within the scope of the invention as defined in the appended claims.

Claims (10)

1. An inorganic wall fixing material is characterized by comprising the following raw materials in parts by mass:
40-70 parts of metal oxide, 4-20 parts of borate, 7-15 parts of dihydric phosphate, 5-25 parts of fine sand stone, 5-25 parts of chopped fiber, 1-5 parts of carbonate and 1-5 parts of weak acid.
2. The inorganic wall-fixing material as claimed in claim 1, wherein:
the metal oxide is one or a mixture of more than two of magnesium oxide and calcium oxide.
3. The inorganic wall-fixing material as claimed in claim 1, wherein:
the borate is sodium tetraborate.
4. The inorganic wall-fixing material as claimed in claim 1, wherein:
the dihydric phosphate is one or a mixture of more than two of sodium dihydrogen phosphate and ammonium dihydrogen phosphate.
5. The inorganic wall-fixing material as claimed in claim 1, wherein:
the chopped fibers are glass fibers.
6. The inorganic wall-fixing material as claimed in claim 1, wherein:
the carbonate is one or a mixture of more than two of calcium carbonate and magnesium carbonate.
7. The inorganic wall-fixing material as claimed in claim 1, wherein:
the weak acid is one or a mixture of two or more of citric acid, acetic acid, oxalic acid and phosphoric acid.
8. A method for preparing the inorganic wall-fixing material as claimed in any one of claims 1 to 7, which comprises the steps of:
step 1: metal oxide, borate, dihydric phosphate, fine sand and chopped fiber are mixed according to the mass ratio of 40-70: 4-20: 7-15: 5-25: 5-25, and stirring for 3-5min at 40-60r/min to obtain a mixture A;
step 2: adding water into the mixture A, stirring for 18-22s, adding weak acid into the mixture A, and continuously stirring for 20-25s to obtain an intermediate product B;
and step 3: adding carbonate into the intermediate product B, and continuously stirring for 20-25s to obtain an inorganic wall fixing material; the obtained inorganic wall fixing material is placed on a bonding plate to be paved and put on a wall, the support frame is removed within 5min, and the tensile strength of the inorganic wall fixing material is tested after 7 d.
9. The method of claim 8, wherein:
in the step 2, the mass ratio of the water to the weak acid to the mixture A is 10-16: 1-3: 61-155.
10. The method of claim 8, wherein:
in step 3, the weight ratio of the carbonate to the inorganic acid in the intermediate product B is 2: 3.
CN202011293274.6A 2020-11-18 2020-11-18 Inorganic wall fixing material and preparation method thereof Active CN112390615B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103508690A (en) * 2013-09-17 2014-01-15 安徽循环经济技术工程院 Novel inorganic binding material capable of bonding various substances and preparation method of novel inorganic binding material
CN107418451A (en) * 2016-05-23 2017-12-01 伦慧东 Normal temperature cure aquation adhesive and preparation method based on inorganic phosphate
CN110143799A (en) * 2019-06-05 2019-08-20 中国科学院合肥物质科学研究院 Inorganic traffic marking material of road and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103508690A (en) * 2013-09-17 2014-01-15 安徽循环经济技术工程院 Novel inorganic binding material capable of bonding various substances and preparation method of novel inorganic binding material
CN107418451A (en) * 2016-05-23 2017-12-01 伦慧东 Normal temperature cure aquation adhesive and preparation method based on inorganic phosphate
CN110143799A (en) * 2019-06-05 2019-08-20 中国科学院合肥物质科学研究院 Inorganic traffic marking material of road and preparation method thereof

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