A binder dispersion and a construction material comprising the same

Abstract

The application discloses a binder dispersion and a building material comprising the same. The binder dispersion comprises a negatively charged monomer I and a positively charged monomer II; the monomer I comprises one or more of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, sodium acrylate, sodium p-styrenesulfonate or methacryloyl ethyl sulfobetaine; the monomer II comprises one or more of p-aminostyrene, methyl-acryloyloxyethyl trimethylammonium chloride, dimethylaminoethyl methacrylate or acryloyloxyethyl trimethylammonium chloride; and the molar ratio of the monomer I to the monomer II is 1-100:1-100. The binder dispersion provided by the application can replace traditional building binder cement, greatly reducing carbon emissions, and can fully play the strong fluidity and electrostatic interaction of the binder dispersion when the building material is prepared, so that the binder dispersion can be uniformly anchored in the interstitial gap of inorganic adhesive aggregates without external stirring, a strong adhesive force is generated, and the formed block material exhibits excellent mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of materials technology. More specifically, it relates to a binder dispersion and a building material comprising the same. Background Technology

[0002] Currently, cement is widely used in construction to bind solid particles such as river sand to prepare concrete building materials. However, cement production requires high-temperature sintering, resulting in high energy consumption and pollution. Producing one ton of cement requires 3.3 GJ of heat energy and generates 800 kg of CO2 emissions. Therefore, developing a new type of binder to replace cement and creating low-carbon, high-strength building materials that can be prepared under normal temperature and pressure conditions is crucial for reducing carbon emissions in the building materials sector. Although various technologies such as biomineralization and geopolymerization have been developed in recent years to bind solid particles and prepare bulk materials, these methods suffer from low mechanical strength and demanding bonding conditions. Therefore, developing novel bonding systems to produce high-strength building materials under low-carbon emission conditions remains a significant challenge. Summary of the Invention

[0003] Based on the above problems, the first objective of this invention is to provide a binder dispersion. This binder dispersion can replace traditional building adhesives such as cement, greatly reducing carbon emissions. Furthermore, the binder dispersion contains monomers with different charges, which allows for excellent electrostatic interactions within the dispersion.

[0004] The second objective of this invention is to provide a novel building material comprising the aforementioned binder dispersion. The building material provided by this invention exhibits excellent mechanical properties under the action of the binder dispersion, with a compressive strength reaching up to 160 MPa, far exceeding the highest national standard for ordinary bricks and concrete. More importantly, because the binder dispersion can generate intermolecular electrostatic interactions with negatively charged inorganic binder aggregates, it can dissipate external energy through the breaking of non-chemical bonds when subjected to external forces. Therefore, this building material can continue to withstand increased pressure after reaching its compressive strength without brittle fracture, making it a novel low-carbon, high-strength material with broad application prospects.

[0005] A third objective of this invention is to provide a method for preparing the building materials described above.

[0006] A fourth objective of this invention is to provide an application of the building materials described above in the preparation of low-carbon building materials.

[0007] To achieve the first objective mentioned above, the present invention adopts the following technical solution:

[0008] This invention discloses a binder dispersion comprising a negatively charged monomer I and a positively charged monomer II;

[0009] Wherein, monomer I includes one or more of acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, sodium acrylate, sodium p-styrenesulfonate or methacryloylethyl sulfobetaine;

[0010] The monomer II comprises one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride.

[0011] The molar ratio of monomer I to monomer II is 1-100:1-100.

[0012] In response to the national call for low-carbon and energy-saving development and the vigorous development of new building materials, this invention creatively proposes a novel binder dispersion that can replace traditional cement as a building adhesive. This binder dispersion contains two monomers with different charges. The strong fluidity and electrostatic interaction of these monomers allow them to be uniformly anchored within the interparticle spaces of equally charged inorganic binder aggregates without external stirring, fully wetting the particle surfaces and forming strong adhesion. Then, under the action of an initiator, an in-situ polymerization reaction is completed, causing the fluid binder dispersion to polymerize into a near-solid, highly viscous linear aggregate, forming regular blocks in a mold. This method enables the production of building materials... The material possesses high compressive strength and yield strength, with a maximum compressive strength of up to 160 MPa, far exceeding the highest national standard grade for ordinary bricks and concrete, exhibiting excellent mechanical properties. More importantly, due to the electrostatic interactions within the binder dispersion and between the binder dispersion and the inorganic binder aggregate, the final building material can dissipate energy through the breakage of non-chemical bonds when subjected to external forces. This allows the building material to continue to withstand pressure after reaching its compressive strength, while the surface of the building material only undergoes minor deformation without brittle fracture. Therefore, it is expected to be widely used in the preparation of new low-carbon high-strength materials.

[0013] The building material provided by this invention can fully utilize the strong fluidity and electrostatic interaction of the two monomers during formation, and uniformly anchor itself in the interparticle gaps of charged inorganic binder aggregate without the need for external stirring. It also fully wets the particle surface to form a strong adhesion, and then initiates an in-situ polymerization reaction to form a block material, further improving its compressive strength and yield strength, and exhibiting excellent mechanical properties.

[0014] Furthermore, the molar ratio of monomer I and monomer II can also be 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:20, 1:30, 1:50, 1:80, 1:100, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 20:1, 30:1, 50:1, 80:1, 100:1, 2:3, or 3:2, etc., as well as any range formed by any two ratios.

[0015] Furthermore, monomers I and II used in this invention can be freely combined according to the needs of actual applications, resulting in building materials with different mechanical properties. For example, monomer I is selected from acrylic acid, and monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride; preferably, monomer I is selected from 2-acrylamido-2-methylpropanesulfonic acid, and monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride; preferably, monomer I is selected from sodium p-styrene sulfonate, and monomer II is selected from ... The monomer I is selected from 2-acrylamido-2-methylpropanesulfonic acid, and the monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride; preferably, the monomer I is selected from methacryloylethylsulfobetaine, and the monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride, etc.

[0016] To improve the dispersibility and flowability of different charged monomers, a portion of solvent can be introduced into the binder dispersion to prepare monomer solutions or binder dispersion solutions with different concentration fractions. Another advantage of adding solvent is that different filling amounts of building materials can be obtained through subsequent drying and air-drying processes. This reduces the amount of binder dispersion required while meeting the mechanical performance requirements of the application scenario, thereby lowering production costs and reducing the weight of the building materials. The solvent includes, but is not limited to, one or more of water, ethanol, dichloromethane, acetone, or dimethyl sulfoxide. Typically, monomer I or monomer II can be formulated into a monomer solution with a mass fraction of 10-100 wt%.

[0017] Furthermore, the binder dispersion also includes an initiator. The type of initiator can be changed according to the initiation method. For example, a thermal initiator can be added when using a thermal initiation method, and a photoinitiator can be added when using a photoinitiation method. No specific limitation is made here. Exemplarily, the initiator includes, but is not limited to, one or more of inorganic peroxide initiators, organic peroxide initiators, or azo initiators.

[0018] Furthermore, the inorganic peroxide initiator includes, but is not limited to, ammonium persulfide and / or potassium persulfide;

[0019] The azo initiators include, but are not limited to, azobisisobutyronitrile and / or azobisisoheptanenitrile;

[0020] The organic peroxide initiators include, but are not limited to, one or more of benzoyl peroxide, isopropyl peroxide, dicumyl peroxide, or tert-butyl peroxide.

[0021] Furthermore, the total mass ratio of monomer I and monomer II to the initiator is 50:1 to 500:1.

[0022] To achieve the second objective mentioned above, the present invention adopts the following technical solution:

[0023] This invention discloses a copolymer-reinforced building material, the building material comprising inorganic binder aggregate.

[0024] as well as

[0025] Linear copolymers that act as binders within the interparticle spaces of inorganic binder aggregates;

[0026] The linear copolymer is obtained by in-situ polymerization of monomer I and monomer II in the binder dispersion as described above, initiated by an initiator.

[0027] The mass ratio of solids to inorganic binder aggregate in the binder dispersion is 0.04-0.40.

[0028] It should be noted that, in this invention, the solids in the binder dispersion refer to monomer I, monomer II and initiator, without considering the mass of the solvent.

[0029] Furthermore, the inorganic binder aggregate includes, but is not limited to, one or more of the following: quartz sand, sea sand, gold sand, yellow pearl sand, desert sand, coal slag, or construction waste particles.

[0030] Furthermore, the inorganic binder aggregate has a particle size of 50-5000 μm. For example, the quartz sand has a particle size of 100-200 μm; the sea sand has a particle size of 300-500 μm; the desert sand has a particle size of 60-250 μm; the golden sand has a particle size of 500-1000 μm; and the yellow pearl sand has a particle size of 2000-3000 μm.

[0031] To achieve the third objective mentioned above, the present invention adopts the following technical solution:

[0032] This invention discloses a method for preparing the building material described above, comprising the following steps:

[0033] (1) Mix monomer I and monomer II in a certain proportion, with or without adding solvent, and mix thoroughly to obtain a mixture;

[0034] (2) Deoxygenate the mixture, add the initiator after deoxygenation, and stir with a magnetic stirr for 15-60s until well mixed to obtain the binder dispersion;

[0035] (3) Fill the mold with inorganic binder aggregate and add the binder dispersion obtained in step (2) into the mold. The binder dispersion will penetrate into the interparticle gaps of the inorganic binder aggregate. Then, in-situ polymerization reaction will be carried out in a thermally initiated environment or a photoinitiated environment. After the reaction is completed, the building material is obtained.

[0036] Furthermore, when thermal initiation is selected as the initiation method, the thermal initiation conditions in step (3) are heating in an oven at 40-85℃ for 10-600 min;

[0037] When photoinitiation is selected as the initiation method, the photoinitiation conditions are irradiation with ultraviolet light at a wavelength of 320-395nm for 5-30 minutes.

[0038] Furthermore, if solvent was added in step (1), a drying process or natural air drying process needs to be added after the polymerization reaction to remove water from the building material and obtain a building material with internal pores.

[0039] The drying conditions are 40-80℃ for 20-60 hours; the natural air-drying conditions are room temperature air-drying for 3-20 days.

[0040] Furthermore, the deoxygenation methods include, but are not limited to, sonicating the solution for 10-60 minutes or purging the solution with nitrogen for 30-120 minutes. Those skilled in the art can use other conventional deoxygenation methods to replace it. After deoxygenation, all other steps are carried out under natural conditions, and there is no need to pay excessive attention to the control of oxygen.

[0041] To achieve the fourth objective mentioned above, the present invention adopts the following technical solution:

[0042] This invention discloses the application of building materials prepared using the building materials described above or the methods described above in the preparation of low-carbon building materials.

[0043] The beneficial effects of this invention are as follows:

[0044] The binder dispersion provided by this invention uses monomers I and II, which have electrostatic interactions, in the preparation of building materials. It can replace traditional building binders such as cement, greatly reducing carbon emissions. Monomers I and II are uniformly anchored in the interparticle gaps of inorganic binder aggregates under gravity, capillary force, and electrostatic interaction. Then, under the action of an initiator, an in-situ polymerization reaction occurs to obtain copolymer-reinforced building materials. This significantly improves the compressive strength and yield strength of the building materials. The compressive strength can reach up to 160 MPa, which is far higher than the highest national standard grade of ordinary bricks and concrete, exhibiting excellent mechanical properties. More importantly, because the binder dispersion can generate intermolecular electrostatic interactions with charged inorganic binder aggregates, it can dissipate external energy through the breaking of non-chemical bonds when subjected to external forces. Therefore, after reaching the compressive strength, the building material can continue to increase the pressure without brittle fracture. It is a new type of low-carbon, high-strength material with broad application prospects. Attached Figure Description

[0045] Figure 1 This invention illustrates the process for forming copolymer-reinforced building materials.

[0046] In this diagram, a shows the process by which the binder dispersion enters the interparticle gaps of the inorganic binder aggregate through gravity and capillary force, and undergoes an in-situ polymerization reaction to bond a large number of particles into blocks; b shows the electrostatic interaction within the binder dispersion and the electrostatic interaction between the binder dispersion and the charged inorganic binder aggregate.

[0047] Figure 2 The stress-strain curve of the building material prepared in Example 1 is shown.

[0048] Figure 3 The stress-strain curve of the building material prepared in Example 2 is shown.

[0049] Figure 4 The stress-strain curve of the building material prepared in Example 3 is shown.

[0050] Figure 5 The stress-strain curve of the building material prepared in Example 4 is shown.

[0051] Figure 6 The stress-strain curve of the building material prepared in Example 5 is shown.

[0052] Figure 7The stress-strain curve of the building material prepared in Example 6 is shown.

[0053] Figure 8 The stress-strain curve of the building material prepared in Example 7 is shown.

[0054] Figure 9 The stress-strain curve of the building material prepared in Example 8 is shown.

[0055] Figure 10 The stress-strain curves of the building material prepared in Comparative Example 1 are shown. Detailed Implementation

[0056] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further clarifies the invention. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0057] Example 1

[0058] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a total mass fraction of 90 wt%, and deoxygenate by ultrasonication for 15 min;

[0059] 2) Add quartz sand (100-200μm) to the silicone mold to fill it completely;

[0060] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to the total mass of the two monomers being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0061] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing quartz sand. The mass ratio of the solids in the binder dispersion to the quartz sand is 0.372. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors in the interparticle gaps of the quartz sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the quartz sand. No stirring is required during the entire addition process.

[0062] 5) Initiate in-situ polymerization of the mold containing the quartz sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0063] 6) After polymerization is complete, the binder dispersion binds the quartz sand to form blocks, which are then demolded and dried to obtain the final product.

[0064] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 2Its yield strength is 122MPa and its compressive strength is 160MPa. When the external force exceeds the compressive strength, the pressure can continue to increase and the building material will only deform without brittle fracture.

[0065] Example 2

[0066] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a mass fraction of 90 wt%, and deoxygenate by ultrasonication for 15 min;

[0067] 2) Add sea sand (300-500μm) to the silicone mold to fill it completely;

[0068] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to total monomer mass being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0069] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing sea sand. The mass ratio of the solids in the binder dispersion to the sea sand is 0.372. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the gaps between the sea sand particles. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the sea sand. No stirring is required during the entire process of adding the binder dispersion.

[0070] 5) Initiate in-situ polymerization of the mold containing the sea sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0071] 6) After polymerization is complete, the binder dispersion binds the sea sand to form blocks, which are then demolded and dried to obtain the final product.

[0072] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 3 Its yield strength is 122MPa and its compressive strength is 136MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0073] Example 3

[0074] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a mass fraction of 90 wt%, and deoxygenate by ultrasonication for 15 min;

[0075] 2) Add desert sand (60-250μm) to the silicone mold and fill the silicone mold completely;

[0076] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to total monomer mass being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0077] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing desert sand. The mass ratio of the solids in the binder dispersion to the desert sand is 0.372. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the interparticle gaps of the desert sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the desert sand. No stirring is required during the entire process of adding the binder dispersion.

[0078] 5) Initiate in-situ polymerization of the mold containing the desert sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0079] 6) After polymerization is complete, the binder dispersion binds the desert sand to form blocks, which are then demolded and dried to obtain the final product.

[0080] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 4 Its yield strength is 89 MPa and its compressive strength is 104 MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0081] Example 4

[0082] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a mass fraction of 90 wt%, and deoxygenate by ultrasonication for 15 min;

[0083] 2) Add gold sand (500-1000μm) to the silicone mold to fill it completely;

[0084] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to total monomer mass being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0085] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing gold sand. The mass ratio of the solids in the binder dispersion to the gold sand is 0.372. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the gaps between the gold sand particles. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the gold sand. No stirring is required during the entire process of adding the binder dispersion.

[0086] 5) Initiate in-situ polymerization of the mold containing the gold sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0087] 6) After polymerization is complete, the binder dispersion binds the gold sand to form blocks, which are then demolded and dried to obtain the final product.

[0088] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 5 Its yield strength is 120MPa and its compressive strength is 127MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0089] Example 5

[0090] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a mass fraction of 90 wt%, and deoxygenate by ultrasonication for 15 min;

[0091] 2) Add yellow pearl sand (2000-3000μm) to the silicone mold and fill the silicone mold completely;

[0092] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to total monomer mass being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0093] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing yellow pearl sand. The mass ratio of the solids in the binder dispersion to the yellow pearl sand is 0.372. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the gaps between the particles of yellow pearl sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the yellow pearl sand. No stirring is required during the entire process of adding the binder dispersion.

[0094] 5) Initiate in-situ polymerization of the mold containing the yellow pearl sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0095] 6) After polymerization is complete, the binder dispersion binds the yellow pearl sand to form blocks, which are then demolded and dried to obtain the final product.

[0096] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 6 Its yield strength is 91 MPa and its compressive strength is 99 MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0097] Example 6

[0098] 1) Add dimethylamine ethyl methacrylate and acrylic acid at a molar ratio of 2:3 to prepare a monomer aqueous solution with a total mass fraction of 50 wt%, and deoxygenate by ultrasonication for 15 min;

[0099] 2) Add quartz sand (100-200μm) to the silicone mold to fill it completely;

[0100] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to the total mass of the two monomers being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0101] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing quartz sand. The mass ratio of the solids in the binder dispersion to the quartz sand is 0.207. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the interparticle gaps of the quartz sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the quartz sand. No stirring is required during the entire process of adding the binder dispersion.

[0102] 5) Initiate in-situ polymerization of the mold containing the quartz sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0103] 6) After polymerization is complete, the binder dispersion binds the quartz sand to form blocks, which are then demolded and dried to obtain the final product.

[0104] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 7 Its yield strength is 65MPa and its compressive strength is 76MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0105] Example 7

[0106] 1) Add methacryloyloxyethyltrimethylammonium chloride and sodium acrylate in a molar ratio of 1:1 to prepare a monomer aqueous solution with a total mass fraction of 50 wt%, and deoxygenate by ultrasonication for 15 min;

[0107] 2) Add quartz sand (100-200μm) to the silicone mold to fill it completely;

[0108] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to the total mass of the two monomers being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0109] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing quartz sand. The mass ratio of the solids in the binder dispersion to the quartz sand is 0.189. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the interparticle gaps of the quartz sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the quartz sand. No stirring is required during the entire addition process.

[0110] 5) Initiate in-situ polymerization of the mold containing the quartz sand and binder dispersion from step 4) in a 60°C oven for 1 hour;

[0111] 6) After polymerization is complete, the binder dispersion binds the quartz sand to form blocks, which are then demolded and dried to obtain the final product.

[0112] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 8 Its yield strength is 41 MPa and its compressive strength is 54 MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0113] Example 8

[0114] 1) Acryloyloxyethyltrimethylammonium chloride and sodium p-styrenesulfonate were added in a molar ratio of 1:1 to prepare a monomer aqueous solution with a total mass fraction of 34.2 wt%, and ultrasonically deoxygenated for 15 min.

[0115] 2) Add quartz sand (100-200μm) to the silicone mold to fill it completely;

[0116] 3) Add azobisisobutyronitrile as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of the initiator to the total mass of the two monomers being 1:100. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0117] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing quartz sand. The mass ratio of the solids in the binder dispersion to the quartz sand is 0.135. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the interparticle gaps of the quartz sand. Simply press the mold firmly on a flat surface to prevent excessive binder dispersion from accumulating on the upper surface of the quartz sand. No stirring is required during the entire addition process.

[0118] 5) Initiate in-situ polymerization of the mold containing the quartz sand and binder dispersion from step 4) in a 60°C oven for 9 hours;

[0119] 6) After polymerization is complete, the binder dispersion binds the quartz sand to form blocks, which are then demolded and dried to obtain the final product.

[0120] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 9 Its yield strength is 14MPa and its compressive strength is 16MPa. When the external force exceeds the compressive strength, the pressure can continue to increase, and the building material will only deform without brittle fracture.

[0121] Comparative Example 1

[0122] 1) Acryloyloxyethyltrimethylammonium chloride and sodium acrylate were added in a molar ratio of 1:8 to prepare a monomer aqueous solution with a total mass fraction of 38.6 wt%.

[0123] 2) Add quartz sand (100-200μm) to the silicone mold to fill it completely;

[0124] 3) Add ammonium persulfate as an initiator to the monomer aqueous solution obtained in step 1), with the ratio of initiator to the total mass of the two monomers being 3:54. Stir with a magnetic stirrer for 15-60 seconds until well mixed to obtain the binder dispersion.

[0125] 4) Add the binder dispersion obtained in step 3) into a silicone mold containing quartz sand. The mass ratio of the solids in the binder dispersion to the quartz sand is 0.165. Under the interaction of gravity, capillary force and electrostatics, the binder dispersion penetrates downward and anchors into the gaps between the quartz sand particles. Then, compact and level the mold on a flat surface.

[0126] 5) Initiate in-situ polymerization of the mold containing the quartz sand and binder dispersion from step 4) in a 60°C oven for 6 hours;

[0127] 6) After polymerization is complete, the binder dispersion binds the quartz sand to form blocks, which are then demolded and dried to obtain the final product.

[0128] The obtained building materials were subjected to compression tests, and the stress-strain curves under compression were obtained. (See attached diagram) Figure 10 Its compressive strength is 25 MPa.

[0129] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A copolymer-reinforced building material, characterized in that, The building materials include inorganic binder aggregates. as well as Linear copolymers that act as binders within the interparticle spaces of inorganic binder aggregates; The linear copolymer is obtained by in-situ polymerization of monomers I and II in the binder dispersion initiated by an initiator; The mass ratio of solids to inorganic binder aggregate in the binder dispersion is 0.04-0.40; The monomer I is selected from one or more of acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, sodium acrylate, sodium p-styrenesulfonate, or methacryloylethyl sulfobetaine; The monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine methacrylate, or acryloyloxyethyltrimethylammonium chloride; The molar ratio of monomer I to monomer II is 1-100:1-100; The inorganic binder aggregate includes one or more of the following: quartz sand, sea sand, gold sand, yellow pearl sand, desert sand, coal slag, or construction waste particles.

2. The building material according to claim 1, characterized in that, The inorganic binder aggregate has a particle size of 50-5000 μm.

3. The building material according to claim 1, characterized in that, The monomer I is selected from acrylic acid, and the monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine ethyl methacrylate, or acryloyloxyethyltrimethylammonium chloride.

4. The building material according to claim 1, characterized in that, The monomer I is selected from 2-acrylamide-2-methylpropanesulfonic acid, and the monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine ethyl methacrylate, or acryloyloxyethyltrimethylammonium chloride.

5. The building material according to claim 1, characterized in that, The monomer I is selected from sodium p-styrene sulfonate, and the monomer II is selected from p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine ethyl methacrylate, or acryloyloxyethyltrimethylammonium chloride.

6. The building material according to claim 1, characterized in that, The monomer I is selected from methacryloylethyl sulfobetaine, and the monomer II is selected from one or more of p-aminostyrene, methacryloyloxyethyltrimethylammonium chloride, dimethylamine ethyl methacrylate, or acryloyloxyethyltrimethylammonium chloride.

7. The building material according to claim 1, characterized in that, The binder dispersion further includes an initiator; the initiator includes one or more of inorganic peroxide initiators, organic peroxide initiators, or azo initiators.

8. The building material according to claim 7, characterized in that, The organic peroxide initiator includes one or more of benzoyl peroxide, cumene hydroperoxide, and dicumene peroxide. The azo initiators include azobisisobutyronitrile and / or azobisisoheptanenitrile.

9. The building material according to claim 7, characterized in that, The total mass ratio of monomer I and monomer II to the initiator is 50:1 to 500:

1.

10. The building material according to claim 1, characterized in that, The binder dispersion further includes a solvent, which includes one or more of water, ethanol, dichloromethane, acetone, or dimethyl sulfoxide.

11. A method for preparing a building material as described in any one of claims 1-10, characterized in that, Includes the following steps: (1) Mix monomer I and monomer II in a certain proportion, with or without adding solvent, and mix thoroughly to obtain a mixture; (2) Deoxygenate the mixture, add the initiator after deoxygenation, and stir with a magnetic stirrer for 15-60s until it is mixed to obtain the binder dispersion; (3) Fill the mold with inorganic binder aggregate and add the binder dispersion obtained in step (2) into the mold. The binder dispersion will penetrate into the interparticle gaps of the inorganic binder aggregate. Then, in-situ polymerization reaction will be carried out in a thermally initiated environment or a photoinitiated environment. After the reaction is completed, the building material is obtained.

12. The preparation method according to claim 11, characterized in that, In step (3), the thermal initiation conditions are heating in an oven at 40-85℃ for 10-600 min; The photoinitiation conditions are irradiation with ultraviolet light at a wavelength of 320-395 nm for 5-30 minutes.

13. The preparation method according to claim 11, characterized in that, After step (3) is completed, a drying process or a natural air-drying process is also included; The drying conditions are 40-80℃ for 20-60 hours; the natural air-drying conditions are room temperature air-drying for 3-20 days.

14. The use of the building material as described in any one of claims 1-10 or the building material prepared by any one of claims 11-13 in the construction of buildings.

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