CN115536356A - Foam concrete assembled wallboard gap filler and preparation method thereof - Google Patents
Foam concrete assembled wallboard gap filler and preparation method thereof Download PDFInfo
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- CN115536356A CN115536356A CN202211220167.XA CN202211220167A CN115536356A CN 115536356 A CN115536356 A CN 115536356A CN 202211220167 A CN202211220167 A CN 202211220167A CN 115536356 A CN115536356 A CN 115536356A
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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
- C04B28/344—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 the phosphate binder being present in the starting composition solely as one or more phosphates
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00672—Pointing or jointing materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention belongs to the technical field of assembly type buildings, and discloses a foam concrete assembly type wallboard gap filler and a preparation method thereof. The foam concrete assembled wallboard gap filler is prepared from the following raw materials in parts by weight: 75 to 125 portions of cement, 0.075 to 0.625 portion of foaming agent, 0.75 to 6.25 portions of coagulant and 22.5 to 87.5 portions of water; the cement consists of 25 to 50 portions of Portland cement and 50 to 75 portions of magnesium potassium phosphate cement. The potassium magnesium phosphate cement foam concrete assembled wallboard gap filler provided by the invention has the advantages of good working performance, difficulty in collapse, convenience in construction, short condensation time, high early strength, excellent bonding performance, aging resistance, wear resistance, difficulty in shedding, good sealing performance and good waterproof performance, can effectively prevent water seepage of an outer wall, and is low in later maintenance cost. This can extend the life of the fabricated building.
Description
Technical Field
The invention relates to the technical field of assembly type buildings, in particular to a foam concrete assembly type wallboard gap filler and a preparation method thereof.
Background
At present, the prefabricated building has become the mainstream of building development, and the prefabricated building node is formed by splicing in a cast-in-place mode, and the short wall is mostly spliced, so horizontal and vertical splicing seams are easy to appear, and liquid flows into the wall along the splicing seams, so that the wall is affected with damp, falls off, and the steel bar is corroded, thereby causing potential safety hazards and shortening the service life of the building. Therefore, the joint filling material of the wallboard is of great importance to the performance and the service life of the fabricated building, and if the quality of the joint filling material is poor or the waterproof performance of joint filling sealing is poor, the joint filling agent is easy to damage and age, and the joint filling agent overflows, joints are filled and seeps water, so that the extra maintenance cost is increased, the structural performance is even affected, and the service life of the building is shortened.
With the deep application of the fabricated building, the problem of caulking and sealing of the fabricated building has attracted more and more attention. The patent CN106630921B discloses a novel high-performance pervious concrete cementing agent and a preparation method thereof, wherein magnesium ammonium phosphate cement and magnesium potassium phosphate cement are used as main materials, and a small amount of boric acid, polypropylene fiber and pigment are doped, and the invention provides a salt-freezing-resistant, wear-resistant and high-strength high-performance pervious concrete cementing agent. Patent CN107586051B discloses a high performance magnesium potassium phosphate cement which has good working performance, wear resistance and frost resistance, but the setting time is longer because of adding retarder. The product of the patent has poor heat insulation performance and cannot be used as an assembled wallboard gap filler.
Patent CN109574700B discloses a dispersed fiber foam concrete and a preparation method thereof, the modified fiber foam concrete prepared by the invention has excellent performances of light weight, high strength, high heat preservation and the like, but has the problems of easy cracking and water absorption of common foam concrete. CN112811858B discloses a full solid waste foam concrete and a preparation method thereof, the invention has simple preparation process, saves building material cost and can improve the comprehensive utilization rate of solid waste. The products of the above patents have long setting time, low early strength and poor adhesive property, and cannot be used for assembled wallboard joint mixtures.
Therefore, there is an urgent need to develop a new type of joint filling material for prefabricated wall panels, which has high early strength, small deformation, high bonding strength, good waterproof performance and good compatibility with the substrate.
Disclosure of Invention
The invention aims to provide a foam concrete assembly type wallboard gap filler and a preparation method thereof, and overcomes the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a foam concrete assembled wallboard gap filler which is prepared from the following raw materials in parts by mass:
75 to 125 portions of cement, 0.075 to 0.625 portion of foaming agent, 0.75 to 6.25 portions of coagulant and 22.5 to 87.5 portions of water;
the cement is prepared from the following raw materials in parts by mass:
25 to 50 parts of Portland cement and 50 to 75 parts of magnesium potassium phosphate cement.
Preferably, in the foam concrete fabricated wallboard gap filler, the JD-2 foaming agent is a vegetable protein foaming agent, the pH value of the JD-2 vegetable protein foaming agent is 6-8, the foam stabilizing time is greater than 4h, the subsidence distance of 1h is less than 9mm, and the bleeding amount of 1h is less than 67mL.
Preferably, in the above-mentioned foam concrete prefabricated wall panel caulking agent, the coagulant is water glass, and the modulus of the water glass is 1.2 to 2.4.
Preferably, in the above foam concrete fabricated wallboard gap filler, the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass:
10-15 parts of dipotassium hydrogen phosphate, 30-45 parts of magnesium oxide and 10-15 parts of silica fume;
the apparent density of the magnesium oxide is 3400-3600 kg/m 3 The average grain diameter is 35-45 mu m;
the apparent density of the silica fume is 2100 to 2300kg/m 3 Average grain diameter of 0.1-0.2 μm, and silicon dioxide content in the silica fume>90％。
The invention also provides a preparation method of the foam concrete assembled wallboard gap filler, which comprises the following steps:
(1) Dissolving an accelerator in a portion of the water to form an accelerator solution, and mixing the portland cement, magnesium potassium phosphate cement, and the accelerator solution to form a cement slurry;
(2) Mixing the foaming agent with the rest water to form foaming agent solution;
(3) Mixing the foaming agent solution with the cement slurry to obtain a foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is 1-2.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) The foam concrete assembled wallboard gap filler disclosed by the invention is quick in condensation, high in early strength, not easy to collapse, not easy to crack on the surface, good in water resistance and impermeability, and capable of effectively playing a building waterproof role and prolonging the building service life.
(2) The foam concrete assembled wallboard gap filler is a cement-based material, has a thermal expansion coefficient close to that of common concrete, has good compatibility and bonding performance with a concrete substrate, and has good volume stability with both potassium magnesium phosphate cement and foam concrete. Therefore, the joint mixture is connected with the wallboard, is not easy to crack and fall off, has good sealing property, waterproofness and aging resistance, and meets the requirement of the joint of the wallboard of the fabricated building.
(3) The joint mixture prepared by adopting the magnesium potassium phosphate cement can avoid cold and hot bridges, remarkably reduce the energy consumption of buildings, has better heat preservation performance than the joint mixture sold in the market and reduces the later maintenance cost.
Detailed Description
The invention provides a foam concrete assembled wallboard gap filler which is prepared from the following raw materials in parts by mass:
75 to 125 portions of cement, 0.075 to 0.625 portion of foaming agent, 0.75 to 6.25 portions of coagulant and 22.5 to 87.5 portions of water;
the cement is prepared from the following raw materials in parts by mass:
25 to 50 portions of Portland cement and 50 to 75 portions of magnesium potassium phosphate cement.
In the present invention, the mass part of the cement is preferably 75 to 125 parts, more preferably 75, 80, 85, 90, 95, 100, 105, 110, 115, 120 or 120 parts, and even more preferably 90, 95, 100, 105 or 110 parts.
In the present invention, the foaming agent is preferably 0.075 to 0.625 parts by mass, more preferably 0.075, 0.100, 0.200, 0.300, 0.400, 0.500, 0.600 or 0.625 parts by mass, and still more preferably 0.200, 0.300 or 0.400 parts by mass.
In the present invention, the mass part of the accelerator is preferably 0.75 to 6.25 parts, more preferably 0.75, 1, 2, 3, 4, 5, 6 or 6.25 parts, and even more preferably 3, 4 or 5 parts.
In the present invention, the mass part of the water is preferably 22.5 to 87.5 parts, more preferably 22.5, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 or 87.5 parts, and still more preferably 50, 55, 60 or 65 parts.
In the present invention, the portland cement in the cement is preferably p.o 42.5 portland cement, and the part by mass of the portland cement is preferably 25 to 50 parts, more preferably 25, 27, 30, 33, 35, 38, 40, 42, 45, 47, or 50 parts, and even more preferably 38, 40, 42, or 45 parts.
In the present invention, the mass part of the potassium magnesium phosphate cement in the cement is preferably 50 to 75 parts, more preferably 50, 52, 56, 58, 60, 64, 68, 72 or 75 parts, and even more preferably 60, 64, 68 or 72 parts.
In the invention, the foaming agent is JD-2 plant protein foaming agent, and the pH value of the JD-2 plant protein foaming agent is preferably 6-8, more preferably 6, 7 or 8, and more preferably 7; the foam stabilizing time is preferably >4h, more preferably >5h, more preferably >6h; the settling distance of 1h is preferably <9mm, more preferably 1, 2, 3, 4, 5, 6, 7 or 8mm; the bleeding volume for 1h is preferably <67mL, more preferably <65mL, more preferably 60, 61, 62, 63, 64 or 65mL.
In the present invention, the coagulant is preferably water glass, more preferably Na 2 O·3.3SiO 2 The sodium silicate is adjusted by NaOH, and the modulus of the sodium silicate after mold adjustment is preferably 1.2-2.4, more preferably 1.2, 1.4, 1.6, 1.8, 2.0, 2.2 or 2.4, and even more preferably 1.8, 2.0, 2.2 or 2.4.
In the invention, the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass:
10 to 15 parts of dipotassium hydrogen phosphate, 30 to 45 parts of magnesium oxide and 10 to 15 parts of silica fume.
In the present invention, the mass part of dipotassium hydrogen phosphate in the potassium magnesium phosphate cement is preferably 10 to 15 parts, more preferably 10, 11, 12, 13, 14 or 15 parts, and still more preferably 13, 14 or 15 parts.
In the present invention, the magnesium oxide is preferably present in the magnesium potassium phosphate cement in an amount of 30 to 45 parts by mass, more preferably 30, 32, 34, 36, 38, 40, 42, 43 or 45 parts by mass, and even more preferably 38, 40, 42 or 45 parts by mass.
In the present invention, the mass part of the silica fume in the potassium magnesium phosphate cement is preferably 10 to 15 parts, more preferably 10, 11, 12, 13, 14 or 15 parts, and still more preferably 13, 14 or 15 parts.
In the present invention, the apparent density of the magnesium oxide is preferably 3400 to 3600kg/m 3 More preferably 3400, 3430, 3450, 3470, 3500, 3550, 3580 or 3600kg/m 3 More preferably 3500, 3550, 3580 or 3600kg/m 3 (ii) a The average particle diameter is preferably 35 to 45 μm, more preferably 35, 36, 37, 38, 39, 40, 41, 42, 43, 44 or 45 μm, and still more preferably 40, 41, 42 or 43 μm.
In the present invention, the apparent density of the silica fume is preferably 2100 to 2300kg/m 3 More preferably 2100. 2120, 2150, 2170, 2200, 2230, 2250, 2280 or 2300kg/m 3 More preferably 2200, 2230, 2250 or 2280kg/m 3 (ii) a The average particle diameter is preferably 0.1 to 0.2. Mu.m, more preferably 0.1, 0.12, 0.14, 0.16, 0.18 or 0.2. Mu.m, and still more preferably 0.16, 0.18 or 0.2. Mu.m; the content of silicon dioxide in the silica fume is preferably>90%, more preferably 91, 92, 93, 94, 95, 96, 97, 98 or 99%, and still more preferably 93, 94 or 95%.
The invention also provides a preparation method of the foam concrete assembled wallboard gap filler, which comprises the following steps:
(1) Dissolving a set accelerator in a portion of the water to form a set accelerator solution, and mixing the portland cement, the magnesium potassium phosphate cement, and the set accelerator solution to form a cement slurry;
(2) Mixing the foaming agent with the rest part of water to form foaming agent solution;
(3) Mixing the foaming agent solution with the cement slurry to obtain a foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is preferably 1 to 2, more preferably 1.2 to 1.8, and more preferably 1.4.
In the invention, the specific process of mixing in the step (3) is as follows: firstly stirring for 60s at the rotation speed of 135-145 r/min and the revolution speed of 57-67 r/min, and then stirring for 120s at the rotation speed of 275-295 r/min and the revolution speed of 115-135 r/min.
In the invention, the concrete process of forming the cement paste is as follows: dissolving a coagulant in a portion of the water to form a coagulant solution, and mixing dipotassium hydrogen phosphate and the coagulant solution to form a mixed solution; after mixing the portland cement, magnesium oxide and silica fume, adding the mixed solution to form cement paste.
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The invention provides a foam concrete assembled wallboard gap filler which is prepared from the following raw materials in parts by mass:
100 parts of cement, 0.5 part of foaming agent, 5 parts of coagulant and 70 parts of water;
the cement is prepared from the following raw materials in parts by mass: 50 parts of P.O 42.5 portland cement and 50 parts of magnesium potassium phosphate cement;
the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass: 10 parts of dipotassium phosphate, 30 parts of magnesium oxide and 10 parts of silica fume;
the apparent density of the magnesium oxide is 3450kg/m 3 An average particle diameter of 37 μm; the apparent density of the silica fume is 2150kg/m 3 The average grain diameter is 0.12 μm, and the content of silicon dioxide in the silica fume is 92 percent; the foaming agent is a vegetable protein foaming agent, the pH value of the JD-2 vegetable protein foaming agent is 6, the foam stabilizing time is 4.1h, the sinking distance of 1h is 8.7mm, and the bleeding amount of 1h is 65mL; the coagulant is Na 2 O·3.3SiO 2 The modulus after NaOH mold adjustment is 1.2.
The preparation method of the foam concrete assembled wallboard gap filler comprises the following steps:
(1) Dissolving a coagulant in a portion of the water to form a coagulant solution, and mixing dipotassium hydrogen phosphate and the coagulant solution to form a mixed solution; mixing P.O 42.5 portland cement, magnesium oxide and silica fume, and adding the mixed solution to form cement paste;
(2) Mixing the foaming agent with the rest water to form foaming agent solution;
(3) Stirring the foaming agent solution and the cement paste for 60s under the conditions of rotation of 140r/min and revolution of 62r/min, and then stirring for 120s under the conditions of rotation of 285r/min and revolution of 125r/min to obtain the foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is 1.
And (3) carrying out performance test on the foam concrete assembled wallboard gap filler, wherein the specific test standard is as follows: the water resistance is determined by referring to JGJ51-2002 technical Specification of lightweight aggregate concrete, and the softening coefficient is used for representing the water resistance; according to relevant requirements in GB/T50082-2009 test method standards for long-term performance and durability of ordinary concrete, an RCM method is adopted to test the diffusion coefficient of chloride ions, and the diffusion coefficient is used for evaluating the impermeability of the cement-based material; the setting time of the concrete mixture is determined by referring to GB/T50080-2016 Standard of Performance test methods of common concrete mixtures; the drying shrinkage performance of the concrete is measured according to reference specification GB/T29417-2012 test method for drying shrinkage cracking performance of cement mortar and concrete; the dry density and compressive strength of the concrete are determined by referring to JC/T266-2011 foam concrete.
The softening coefficient was found to be 0.97; diffusion coefficient of chloride ion is 13.02X 10 -12 m 2 ·s -1 (ii) a The initial setting time is 16min, and the final setting time is 22min; drying shrinkage strain of 113.96X 10 -6 (ii) a Dry density of 357kg/m 3 (ii) a The compressive strength is 2.26MPa.
Example 2
The invention provides a foam concrete assembled wallboard gap filler which is prepared from the following raw materials in parts by mass:
100 parts of cement, 0.3 part of foaming agent, 3 parts of coagulant and 50 parts of water;
the cement is prepared from the following raw materials in parts by mass: 40 parts of P.O 42.5 Portland cement and 60 parts of potassium magnesium phosphate cement;
the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass: 15 parts of dipotassium phosphate, 30 parts of magnesium oxide and 15 parts of silica fume;
the apparent density of the magnesium oxide is 3500kg/m 3 The average particle size is 40 mu m; the apparent density of the silica fume is 2200kg/m 3 The average grain diameter is 0.15 μm, and the content of silicon dioxide in the silica fume is 94%; the foaming agent is a JD-2 plant protein foaming agent, the pH value of the JD-2 plant protein foaming agent is 7, the foam stabilizing time is 4.2h, the sinking distance of 1h is 8mm, and the bleeding amount of 1h is 64mL; the coagulant is Na 2 O·3.3SiO 2 The modulus after NaOH mold adjustment is 1.8.
The preparation method of the foam concrete assembled wallboard gap filler comprises the following steps:
(1) Dissolving a coagulant in a portion of the water to form a coagulant solution, and mixing dipotassium hydrogen phosphate and the coagulant solution to form a mixed solution; mixing P.O 42.5 portland cement, magnesium oxide and silica fume, and adding the mixed solution to form cement paste;
(2) Mixing the foaming agent with the rest water to form foaming agent solution;
(3) Stirring the foaming agent solution and the cement paste for 60s under the conditions of 135r/min rotation and 57r/min revolution, and then stirring for 120s under the conditions of 295r/min rotation and 135r/min revolution to obtain the foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is 1.
The performance test of the foam concrete assembled wallboard gap filler is carried out, and the specific standard of the test is consistent with that in the example 1.
The softening coefficient was found to be 0.94; diffusion coefficient of chloride ion is 10.21X 10 -12 m 2 ·s -1 (ii) a The initial setting time is 11min, and the final setting time is 15min; drying shrinkage strain of 101.78X 10 -6 (ii) a The dry density was 393kg/m 3 (ii) a The compressive strength is 3.87MPa.
Example 3
The invention provides a foam concrete assembled wallboard gap filler which is prepared from the following raw materials in parts by mass:
100 parts of cement, 0.1 part of foaming agent, 1 part of coagulant and 30 parts of water;
the cement is prepared from the following raw materials in parts by mass: 25 parts of P.O 42.5 Portland cement and 75 parts of potassium magnesium phosphate cement;
the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass: 15 parts of dipotassium phosphate, 45 parts of magnesium oxide and 15 parts of silica fume;
the magnesium oxide has an apparent density of 3550kg/m 3 The average particle size is 43 μm; the apparent density of the silica fume is 2250kg/m 3 The average grain diameter is 0.18 μm, and the content of silicon dioxide in the silica fume is 93 percent; the describedThe foaming agent is a JD-2 plant protein foaming agent, the pH value of the JD-2 plant protein foaming agent is 8, the foam stabilizing time is 4.4h, the subsidence distance of 1h is 7mm, and the bleeding amount of 1h is 61mL; the coagulant is Na 2 O·3.3SiO 2 The modulus after NaOH mold adjustment is 2.4.
The preparation method of the foam concrete assembly type wallboard gap filler comprises the following steps of:
(1) Dissolving a coagulant in a portion of the water to form a coagulant solution, and mixing dipotassium hydrogen phosphate and the coagulant solution to form a mixed solution; mixing P.O 42.5 portland cement, magnesium oxide and silica fume, and adding the mixed solution to form cement paste;
(2) Mixing the foaming agent with the rest part of water to form foaming agent solution;
(3) Stirring the foaming agent solution and the cement slurry for 60s under the conditions of rotation of 145r/min and revolution of 67r/min, and stirring for 120s under the conditions of rotation of 275r/min and revolution of 115r/min to obtain the foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is 2.
And (3) carrying out performance test on the foam concrete assembled wallboard gap filler, wherein the specific test standard is consistent with that in the example 1.
The softening coefficient was found to be 0.91; diffusion coefficient of chloride ion is 8.83X 10 -12 m 2 ·s -1 (ii) a The initial setting time is 5min, and the final setting time is 7min; drying shrinkage strain of 97.37X 10 -6 (ii) a The dry density was 432kg/m 3 (ii) a The compressive strength is 5.16MPa.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The foam concrete assembled wallboard gap filler is characterized by being prepared from the following raw materials in parts by mass:
75 to 125 portions of cement, 0.075 to 0.625 portion of foaming agent, 0.75 to 6.25 portions of coagulant and 22.5 to 87.5 portions of water;
the cement is prepared from the following raw materials in parts by mass:
25 to 50 portions of Portland cement and 50 to 75 portions of magnesium potassium phosphate cement.
2. The foam concrete assembled wallboard gap filler according to claim 1, wherein the foaming agent is a JD-2 plant protein foaming agent, the pH value of the JD-2 plant protein foaming agent is 6-8, the foam stabilizing time is >4h, the settlement distance of 1h is <9mm, and the bleeding amount of 1h is <67mL.
3. The foamed concrete fabricated wallboard caulk of claim 2, wherein the accelerator is water glass, and the modulus of the water glass is 1.2-2.4.
4. The foam concrete fabricated wallboard gap filler of claim 1 or 2, wherein the potassium magnesium phosphate cement is prepared from the following raw materials in parts by mass:
10-15 parts of dipotassium hydrogen phosphate, 30-45 parts of magnesium oxide and 10-15 parts of silica fume;
the apparent density of the magnesium oxide is 3400-3600 kg/m 3 The average grain diameter is 35-45 mu m;
the apparent density of the silica fume is 2100 to 2300kg/m 3 Average grain diameter of 0.1-0.2 μm, and the content of silicon dioxide in the silica fume>90％。
5. A process for preparing a foam concrete filled prefabricated wall panel joint mixture according to any one of claims 1 to 4, comprising the steps of:
(1) Dissolving an accelerator in a portion of the water to form an accelerator solution, and mixing the portland cement, magnesium potassium phosphate cement, and the accelerator solution to form a cement slurry;
(2) Mixing the foaming agent with the rest water to form foaming agent solution;
(3) Mixing the foaming agent solution with the cement slurry to obtain a foam concrete assembled wallboard gap filler;
the mass ratio of water in the step (1) to water in the step (2) is 1-2.
6. The method for preparing a foam concrete prefabricated wall panel caulking agent according to claim 5, wherein the mixing in the step (1) is stirring.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050049449A1 (en) * | 2003-08-25 | 2005-03-03 | Forrester Keith Edward | Method for chemiophysical stabilization of waste |
| CN105272138A (en) * | 2015-10-10 | 2016-01-27 | 同济大学 | Magnesium phosphate cement based rapid repair mortar and preparation method thereof |
| US20160347662A1 (en) * | 2014-02-04 | 2016-12-01 | Evan R. Daniels | Lightweight Thermal Insulating Cement Based Materials |
| CN113060991A (en) * | 2021-04-08 | 2021-07-02 | 武汉来道建材科技有限公司 | Light waterproof high-strength foam concrete and preparation method thereof |
| CN114873986A (en) * | 2022-06-23 | 2022-08-09 | 重庆永固新型建材有限公司 | Cement-based crack repair slurry and preparation method thereof |
-
2022
- 2022-10-08 CN CN202211220167.XA patent/CN115536356A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050049449A1 (en) * | 2003-08-25 | 2005-03-03 | Forrester Keith Edward | Method for chemiophysical stabilization of waste |
| US20160347662A1 (en) * | 2014-02-04 | 2016-12-01 | Evan R. Daniels | Lightweight Thermal Insulating Cement Based Materials |
| CN105272138A (en) * | 2015-10-10 | 2016-01-27 | 同济大学 | Magnesium phosphate cement based rapid repair mortar and preparation method thereof |
| CN113060991A (en) * | 2021-04-08 | 2021-07-02 | 武汉来道建材科技有限公司 | Light waterproof high-strength foam concrete and preparation method thereof |
| CN114873986A (en) * | 2022-06-23 | 2022-08-09 | 重庆永固新型建材有限公司 | Cement-based crack repair slurry and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| YUDONG XIE ET AL.: "Preliminary investigation of the hydration mechanism of MgO-SiO2-K2HPO4 cement", 《CONSTRUCTION AND BUILDING MATERIALS》, pages 1 - 8 * |
| 丁铸;孙晨;戴梦希;: "磷酸盐水泥砂浆作为锚固胶的性能研究", no. 02 * |
| 仝万亮: "矿物掺合料与硅酸盐水泥改性磷酸镁水泥的性能研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, pages 13 - 15 * |
| 顾华健: "大流动性磷酸钾镁水泥浆体设计及性能试验研究" * |
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