Lightweight foamed building material and preparation method thereof

Abstract

The invention discloses a light foaming building material and a preparation method thereof, and belongs to the technical field of building materials. The building material is prepared from the following components in parts by weight: 30 to 39 parts of waste brick and tile fine aggregate, 26 to 35 parts of solid waste-based sulphoaluminate cement, 23 to 30 parts of concrete fine aggregate, 7 to 12 parts of waste glass powder, 9 to 14 parts of waste glass fiber reinforced plastic fiber, 0.55 to 1.15 parts of air entraining agent, 1.05 to 3.15 parts of foam stabilizer and 0.2 to 0.35 part of water reducing agent, wherein the foam stabilizer comprises nano silicon dioxide and modified silicon resin polyether emulsion. The light foaming building material has good crack resistance and high strength while having low dry density, and the application of the light foaming building material is improved.

Description

Technical Field

[0001] The invention relates to a lightweight foamed building material and a preparation method thereof, belonging to the technical field of building materials. Background Art

[0002] In the field of building materials, foamed building materials are a kind of foamed concrete, which well reflects the energy-saving effect of building materials. For example, in construction projects such as building roof insulation, building exterior wall insulation, indoor floor heating insulation, building exterior insulation and composite interior wall insulation and sound insulation, foamed building materials with light weight and heat insulation are widely used. However, the existing foamed concrete has the following main disadvantages: 1) After the foamed concrete wall material is poured, it will shrink during the hardening process, resulting in a reduction in volume, cracks, and more cracking; 2) Due to the poor stability of the internal structure of the foamed concrete, the strength of the foamed concrete is affected and the strength requirements of the wall material cannot be met. Summary of the invention

[0003] In order to solve at least one problem existing in the above-mentioned prior art, the present invention provides a lightweight foamed building material and a preparation method thereof. The lightweight foamed building material has good crack resistance and high strength while having a low dry density, thereby improving the application of the lightweight foamed building material.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a lightweight foamed building material, comprising the following raw materials, calculated by weight: 30 to 39 parts of waste brick and tile fine aggregate, 26 to 35 parts of solid waste-based sulfoaluminate cement, 23 to 30 parts of concrete fine aggregate, 7 to 12 parts of waste glass powder, 9 to 14 parts of waste glass fiber reinforced plastic fiber, 0.55 to 1.15 parts of air entraining agent, 1.05 to 3.15 parts of foam stabilizer and 0.2 to 0.35 parts of water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion.

[0005] Preferably, the weight of the waste glass powder accounts for 13.2-17.4% of the sum of the weight of the waste brick and tile fine aggregate and the concrete fine aggregate.

[0006] Preferably, the weight of waste glass fiber reinforced plastics accounts for 11.3-13.5% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulphoaluminate cement and concrete fine aggregate.

[0007] Preferably, the weight of the foam stabilizer accounts for 1.3-3.1% of the sum of the weight of the waste brick and tile fine aggregate and the solid waste-based sulphoaluminate cement and concrete fine aggregate.

[0008] Preferably, the weight of the air entraining agent accounts for 30-71.5% of the weight of the foam stabilizer.

[0009] Preferably, the air entraining agent is one of sodium rosin acid salt, polyrosin glycerol ester or sodium alkylbenzene sulfonate.

[0010] Preferably, the foam stabilizer consists of nano silicon dioxide and modified silicone resin polyether emulsion.

[0011] Preferably, in the foam stabilizer, the mass ratio of nano-silicon dioxide to modified silicone resin polyether emulsion is 18 to 22:1, preferably 20:1.

[0012] Preferably, the water reducer is a polycarboxylate water reducer or a naphthalene water reducer.

[0013] Preferably, the density of the lightweight foamed building material is 410-460 kg / m 3 .

[0014] The present invention provides a method for preparing a lightweight foamed building material, comprising the following preparation steps:

[0015] (1) firstly crushing the waste glass fiber reinforced plastic fiber into a diameter of 1 to 2.5 mm, and then mixing with waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder, foam stabilizer nano-silicon dioxide and water reducer, and stirring evenly to obtain a mixed solid powder;

[0016] (2) mixing an air entraining agent, a foam stabilizer modified silicone resin polyether emulsion and deionized water to obtain a foaming liquid material;

[0017] (3) mixing the mixed solid powder material and the foaming liquid material, stirring to obtain a foam slurry;

[0018] (4) The foam slurry is injection molded, cured in a standard curing room until solidified, then demoulded, and then cured to a target age to obtain a lightweight foamed building material.

[0019] Preferably, the stirring rate of step (3) is 1500-1800 rpm, and the stirring time is 2-3 min.

[0020] Preferably, the amount of deionized water added is 1.5 to 2.5 times the weight of the mixed solid powder.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention uses waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder and waste glass fiber as raw materials to realize the resource utilization of waste solid materials, and has the characteristics of simple process, green energy saving and environmental friendliness;

[0023] 2. The present invention uses waste glass powder and waste glass fiber reinforced plastics to form a compound system with waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, and concrete fine aggregate, which significantly improves the mechanical properties and crack resistance of lightweight foamed building materials;

[0024] 3. The present invention uses the interaction between the foam stabilizer and the air entraining agent to reduce the density of the lightweight foamed building material while improving the strength and crack resistance of the lightweight foamed building material;

[0025] 4. The foam stabilizer used in the present invention includes nano-silicon dioxide and modified silicone resin polyether emulsion. The nano-silicon dioxide and the modified silicone resin polyether emulsion work synergistically to reduce the density of the lightweight foamed building material and improve the structural stability of the lightweight foamed building material, so that the lightweight foamed building material has excellent and stable strength. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions in the implementation of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer.

[0027] Example 1

[0028] A lightweight foamed building material, comprising the following raw materials, measured by weight: 30 parts of waste brick and tile fine aggregate, 26 parts of solid waste-based sulphoaluminate cement, 23 parts of concrete fine aggregate, 7 parts of waste glass powder, 9 parts of waste glass fiber reinforced plastic fiber, 0.55 parts of sodium rosin acid air entraining agent, 1.05 parts of foam stabilizer and 0.2 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0029] The preparation process is as follows:

[0030] (1) firstly crushing the above-mentioned waste glass fiber reinforced plastic fibers by weight into a diameter of 1 to 2.5 mm, and then mixing with the above-mentioned waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder, nano-silica and polycarboxylate water reducer by weight, stirring evenly to obtain a mixed solid powder;

[0031] (2) mixing the above-mentioned parts by weight of sodium rosin acid and modified silicone resin polyether emulsion with 145 parts of deionized water to obtain a foaming liquid material;

[0032] (3) mixing the mixed solid powder and the foaming liquid, stirring at a stirring rate of 1500 rpm for 2 min to obtain a foam slurry;

[0033] (4) injection molding the foam slurry, curing it in a standard curing room until solidification, then demoulding it, and then continuing to cure it to a target age to obtain a lightweight foamed building material;

[0034] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 13.2% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.4% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 1.3% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 52.4% of the weight of foam stabilizer.

[0035] Example 2

[0036] A lightweight foamed building material, comprising the following raw materials, measured by weight: 35 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 26.5 parts of concrete fine aggregate, 9.5 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic fiber, 0.85 parts of sodium rosin acid air entraining agent, 2.2 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 20:1;

[0037] The preparation process is as follows:

[0038] (1) firstly crushing the above-mentioned waste glass fiber reinforced plastic fibers by weight into a diameter of 1 to 2.5 mm, and then mixing with the above-mentioned waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder, nano-silica and polycarboxylate water reducer by weight, stirring evenly to obtain a mixed solid powder;

[0039] (2) mixing the above-mentioned parts by weight of sodium rosin acid and modified silicone resin polyether emulsion with 230 parts by weight of deionized water to obtain a foaming liquid material;

[0040] (3) mixing the mixed solid powder and the foaming liquid, stirring at a stirring rate of 1650 rpm for 2.5 min to obtain a foam slurry;

[0041] (4) injection molding the foam slurry, curing it in a standard curing room until solidification, then demoulding it, and then continuing to cure it to a target age to obtain a lightweight foamed building material;

[0042] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 15.4% of the sum of the weights of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic accounts for 12% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement, and concrete fine aggregate; the weight of the foam stabilizer accounts for 2.4% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement, and concrete fine aggregate; the weight of the air-entraining agent accounts for 38.6% of the weight of the foam stabilizer.

[0043] Example 3

[0044] A lightweight foamed building material, comprising the following raw materials, by weight: 39 parts of waste brick and tile fine aggregate, 35 parts of solid waste-based sulfoaluminate cement, 30 parts of concrete fine aggregate, 12 parts of waste glass powder, 14 parts of waste glass fiber reinforced plastic, 1.15 parts of sodium rosinate air-entraining agent, 3.15 parts of foam stabilizer, and 0.35 parts of polycarboxylate water reducer; wherein, the foam stabilizer comprises nano-silica and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0045] The preparation method process is as follows:

[0046] (1) First, crush the waste glass fiber reinforced plastic of the above weight parts to a diameter length of 1 - 2.5 mm, and then mix it with the waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement, concrete fine aggregate, waste glass powder, nano-silica, and polycarboxylate water reducer of the above weight parts, and stir evenly to obtain a mixed solid powder material;

[0047] (2) Mix the sodium rosinate and modified silicone resin polyether emulsion of the above weight parts with 330 parts of deionized water to obtain a foaming liquid material;

[0048] (3) Mix the above mixed solid powder material and foaming liquid material, and stir at a stirring rate of 1800 rpm for 3 minutes to obtain a foam slurry;

[0049] (4) Inject the above foam slurry into a mold, cure it in a standard curing room until it solidifies, then perform demolding treatment, and then continue to cure it to the target age to obtain a lightweight foamed building material;

[0050] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 13.2% of the sum of the weights of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic accounts for 11.4% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement, and concrete fine aggregate; the weight of the foam stabilizer accounts for 1.3% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement, and concrete fine aggregate; the weight of the air-entraining agent accounts for 52.4% of the weight of the foam stabilizer.

[0051] Example 4

[0052] A lightweight foamed building material, comprising the following raw materials, measured by weight: 33 parts of waste brick and tile fine aggregate, 34 parts of solid waste-based sulphoaluminate cement, 26 parts of concrete fine aggregate, 10 parts of waste glass powder, 12.2 parts of waste glass fiber reinforced plastic fiber, 0.8 parts of sodium rosin acid air entraining agent, 2.6 parts of foam stabilizer and 0.3 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0053] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0054] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 13.1% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 30.8% of the weight of foam stabilizer.

[0055] Example 5

[0056] A lightweight foamed building material, comprising the following raw materials, measured by weight: 37 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulphoaluminate cement, 28 parts of concrete fine aggregate, 11 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic fiber, 1.05 parts of sodium rosin acid air entraining agent, 1.47 parts of foam stabilizer and 0.25 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0057] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0058] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 1.6% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 71.4% of the weight of foam stabilizer.

[0059] Example 6

[0060] A lightweight foamed building material, comprising the following raw materials, measured by weight: 32 parts of waste brick and tile fine aggregate, 33 parts of solid waste-based sulphoaluminate cement, 25 parts of concrete fine aggregate, 9.5 parts of waste glass powder, 10.5 parts of waste glass fiber reinforced plastic fiber, 0.9 parts of polyrosin glycerol ester air entraining agent, 2 parts of foam stabilizer and 0.28 parts of polycarboxylic acid water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 18:1;

[0061] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0062] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.7% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.7% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 45% of the weight of foam stabilizer.

[0063] Example 7

[0064] A lightweight foamed building material, comprising the following raw materials, measured by weight: 36 parts of waste brick and tile fine aggregate, 27 parts of solid waste-based sulphoaluminate cement, 23 parts of concrete fine aggregate, 10 parts of waste glass powder, 13 parts of waste glass fiber reinforced plastic fiber, 1 part of sodium alkylbenzene sulfonate air entraining agent, 1.8 parts of foam stabilizer and 0.32 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 22:1;

[0065] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0066] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 15.1% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.1% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 55.6% of the weight of foam stabilizer.

[0067] Example 8

[0068] A lightweight foamed building material, comprising the following raw materials, by weight: 35 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 26.5 parts of concrete fine aggregate, 8 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic, 0.85 part of sodium rosinate air-entraining agent, 2.2 parts of foam stabilizer and 0.28 part of polycarboxylate water reducer; wherein, the foam stabilizer comprises nano-silica and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0069] The preparation process is the same as that of Example 2, wherein the addition amount of deionized water is 2 times the weight of the mixed solid powder materials;

[0070] In the lightweight foamed building material of this example, the weight of the waste glass powder accounts for 13% of the sum of the weights of the waste brick and tile fine aggregate and the concrete fine aggregate; the weight of the waste glass fiber reinforced plastic accounts for 12% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the foam stabilizer accounts for 2.4% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the air-entraining agent accounts for 38.6% of the weight of the foam stabilizer.

[0071] Example 9

[0072] A lightweight foamed building material, comprising the following raw materials, by weight: 34 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 26 parts of concrete fine aggregate, 11 parts of waste glass powder, 10.5 parts of waste glass fiber reinforced plastic, 0.85 part of sodium rosinate air-entraining agent, 2.2 parts of foam stabilizer and 0.28 part of polycarboxylate water reducer; wherein, the foam stabilizer comprises nano-silica and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0073] The preparation process is the same as that of Example 2, wherein the addition amount of deionized water is 2 times the weight of the mixed solid powder materials;

[0074] In the lightweight foamed building material of this example, the weight of the waste glass powder accounts for 18.3% of the sum of the weights of the waste brick and tile fine aggregate and the concrete fine aggregate; the weight of the waste glass fiber reinforced plastic accounts for 11.7% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the foam stabilizer accounts for 2.4% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the air-entraining agent accounts for 38.6% of the weight of the foam stabilizer.

[0075] Example 10

[0076] A lightweight foamed building material, comprising the following raw materials, measured by weight: 35 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 26.5 parts of concrete fine aggregate, 9.5 parts of waste glass powder, 10 parts of waste glass fiber reinforced plastic fiber, 0.85 parts of sodium rosin acid air entraining agent, 2.2 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0077] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0078] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 15.4% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 10.9% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.4% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 38.6% of the weight of foam stabilizer.

[0079] Embodiment 11

[0080] A lightweight foamed building material, comprising the following raw materials, measured by weight: 32 parts of waste brick and tile fine aggregate, 33 parts of solid waste-based sulphoaluminate cement, 29 parts of concrete fine aggregate, 10 parts of waste glass powder, 13 parts of waste glass fiber reinforced plastic fiber, 0.85 parts of polyrosin glycerol ester air entraining agent, 2.2 parts of foam stabilizer and 0.28 parts of polycarboxylic acid water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 20:1;

[0081] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0082] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.4% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 13.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.3% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 38.6% of the weight of foam stabilizer.

[0083] Example 12

[0084] A lightweight foamed building material, comprising the following raw materials, measured by weight: 35 parts of waste brick and tile fine aggregate, 31 parts of solid waste-based sulphoaluminate cement, 26 parts of concrete fine aggregate, 8.5 parts of waste glass powder, 11.5 parts of waste glass fiber reinforced plastic fiber, 0.75 parts of polyrosin glycerol ester air entraining agent, 1.1 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 20:1;

[0085] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0086] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 13.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 12.5% ​​of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 1.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 68.2% of the weight of foam stabilizer.

[0087] Embodiment 13

[0088] A lightweight foamed building material, comprising the following raw materials, measured by weight: 335 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 28 parts of concrete fine aggregate, 9 parts of waste glass powder, 12 parts of waste glass fiber reinforced plastic fiber, 0.9 parts of sodium rosin acid air entraining agent, 3 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 20:1;

[0089] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0090] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 14.8% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 13.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 3.3% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 30% of the weight of foam stabilizer.

[0091] Embodiment 14

[0092] A lightweight foamed building material, comprising the following raw materials, measured by weight: 33 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulfoaluminate cement, 24 parts of concrete fine aggregate, 9.5 parts of waste glass powder, 11.2 parts of waste glass fiber reinforced plastic fiber, 0.65 parts of sodium alkylbenzene sulfonate air entraining agent, 2.2 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0093] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0094] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.7% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 13.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 2.6% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 29.5% of the weight of foam stabilizer.

[0095] Embodiment 15

[0096] A lightweight foamed building material, comprising the following raw materials, measured by weight: 36 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulfoaluminate cement, 25 parts of concrete fine aggregate, 8.7 parts of waste glass powder, 10.8 parts of waste glass fiber reinforced plastic fiber, 0.97 parts of sodium alkylbenzene sulfonate air entraining agent, 1.35 parts of foam stabilizer and 0.28 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0097] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0098] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 14.3% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 12.1% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 51.% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 71.9% of the weight of foam stabilizer.

[0099] Example 16

[0100] A lightweight foamed building material, comprising the following raw materials, measured by weight: 39 parts of waste brick and tile fine aggregate, 33 parts of solid waste-based sulphoaluminate cement, 30 parts of concrete fine aggregate, 9 parts of waste glass powder, 10 parts of waste glass fiber reinforced plastic fiber, 0.95 parts of sodium rosin acid air entraining agent, 1.25 parts of foam stabilizer and 0.32 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0101] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0102] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 13% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 9.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 1.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 76% of the weight of foam stabilizer.

[0103] Embodiment 17

[0104] A lightweight foamed building material, comprising the following raw materials, measured by weight: 32 parts of waste brick and tile fine aggregate, 26 parts of solid waste-based sulphoaluminate cement, 24 parts of concrete fine aggregate, 12 parts of waste glass powder, 14 parts of waste glass fiber reinforced plastic fiber, 0.7 parts of sodium rosin acid air entraining agent, 2.65 parts of foam stabilizer and 0.25 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0105] The preparation process is the same as that of Example 2, wherein the amount of deionized water added is twice the weight of the mixed solid powder;

[0106] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 21.4% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 17.1% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 3.2% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 26.4% of the weight of foam stabilizer.

[0107] Comparative Example 1

[0108] A lightweight foamed building material, comprising the following raw materials, by weight: 33 parts of waste brick and tile fine aggregate, 34 parts of solid waste-based sulphoaluminate cement, 26 parts of concrete fine aggregate, 10 parts of waste glass powder, 0.8 part of sodium rosinate air-entraining agent, 2.6 parts of foam stabilizer and 0.3 part of polycarboxylate water reducer; wherein, the foam stabilizer comprises nano-silica and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0109] The lightweight foamed building material of this comparative example does not contain waste glass fiber reinforced plastic;

[0110] The preparation method process is as follows: (1) Mix the waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder, nano-silica and polycarboxylate water reducer in the above weight parts, and stir evenly to obtain a mixed solid powder; the remaining steps are exactly the same as those in Example 4;

[0111] In the lightweight foamed building material of this example, the weight of the waste glass powder accounts for 16.9% of the sum of the weights of the waste brick and tile fine aggregate and the concrete fine aggregate; the weight of the foam stabilizer accounts for 2.8% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the air-entraining agent accounts for 30.8% of the weight of the foam stabilizer.

[0112] Comparative Example 2

[0113] A lightweight foamed building material, comprising the following raw materials, by weight: 35 parts of waste brick and tile fine aggregate, 30 parts of solid waste-based sulphoaluminate cement, 26.5 parts of concrete fine aggregate, 11 parts of waste glass fiber reinforced plastic, 0.85 part of sodium rosinate air-entraining agent, 2.2 parts of foam stabilizer and 0.28 part of polycarboxylate water reducer; wherein, the foam stabilizer comprises nano-silica and modified silicone resin polyether emulsion and the mass ratio is 20:1;

[0114] The lightweight foamed building material of this comparative example does not contain waste glass powder;

[0115] The preparation method process is as follows: (1) First, crush the waste glass fiber reinforced plastic in the above weight parts to a diameter of 1 - 2.5 mm, and then mix it with the waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, nano-silica and polycarboxylate water reducer in the above weight parts, and stir evenly to obtain a mixed solid powder; the remaining steps are exactly the same as those in Example 2;

[0116] In the lightweight foamed building material of this comparative example, the weight of the waste glass fiber reinforced plastic accounts for 12% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the foam stabilizer accounts for 2.4% of the sum of the weights of the waste brick and tile fine aggregate, the solid waste-based sulphoaluminate cement and the concrete fine aggregate; the weight of the air-entraining agent accounts for 38.6% of the weight of the foam stabilizer.

[0117] Comparative Example 3

[0118] A lightweight foamed building material, comprising the following raw materials, measured by weight: 36 parts of waste brick and tile fine aggregate, 27 parts of solid waste-based sulphoaluminate cement, 23 parts of concrete fine aggregate, 1 part of sodium alkylbenzene sulfonate air entraining agent, 1.8 parts of foam stabilizer and 0.32 parts of polycarboxylate water reducer; wherein the foam stabilizer comprises nano-silicon dioxide and modified silicone resin polyether emulsion in a mass ratio of 22:1;

[0119] The lightweight foamed building material of this comparative example does not contain waste glass fiber reinforced plastic fibers and waste glass powder;

[0120] The preparation method is as follows: (1) mixing the above-mentioned waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, nano-silica and polycarboxylate water reducer in parts by weight, stirring evenly to obtain a mixed solid powder; the remaining steps are exactly the same as those in Example 7;

[0121] In the lightweight foamed building material of this comparative example, the weight of the foam stabilizer accounts for 2.1% of the sum of the weight of the waste brick and tile fine aggregate and the solid waste-based sulphoaluminate cement and concrete fine aggregate; the weight of the air entraining agent accounts for 55.6% of the weight of the foam stabilizer.

[0122] Comparative Example 4

[0123] A lightweight foamed building material, comprising the following raw materials, measured by weight: 37 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulphoaluminate cement, 28 parts of concrete fine aggregate, 11 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic fiber, 1.05 parts of sodium rosin acid air entraining agent and 0.25 parts of polycarboxylate water reducer;

[0124] The lightweight foamed building material of this comparative example does not contain a foam stabilizer;

[0125] The preparation process is the same as that of Example 5, except that nano-silicon dioxide is not added in step (1), and modified silicone resin polyether emulsion is not added in step (2);

[0126] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the total weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.8% of the total weight of waste brick and tile fine aggregate and solid waste-based sulphoaluminate cement and concrete fine aggregate.

[0127] Comparative Example 5

[0128] A lightweight foamed building material, comprising the following raw materials, measured by weight: 37 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulphoaluminate cement, 28 parts of concrete fine aggregate, 11 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic fiber, 1.05 parts of sodium rosin acid air entraining agent, 1.47 parts of foam stabilizer and 0.25 parts of polycarboxylate water reducer; wherein the foam stabilizer is only nano-silicon dioxide;

[0129] The preparation process is the same as that of Example 5, except that the modified silicone resin polyether emulsion is not added in step (2);

[0130] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 1.5% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 71.4% of the weight of foam stabilizer.

[0131] Comparative Example 6

[0132] A lightweight foamed building material, comprising the following raw materials, measured by weight: 37 parts of waste brick and tile fine aggregate, 28 parts of solid waste-based sulphoaluminate cement, 28 parts of concrete fine aggregate, 11 parts of waste glass powder, 11 parts of waste glass fiber reinforced plastic fiber, 1.05 parts of sodium rosin acid air entraining agent, 0.07 parts of foam stabilizer and 0.25 parts of polycarboxylate water reducer; wherein the foam stabilizer is only modified silicone resin polyether emulsion;

[0133] The preparation process is the same as that of Example 5, except that nano-silicon dioxide is not added in step (1);

[0134] In the lightweight foamed building material of this embodiment, the weight of waste glass powder accounts for 16.9% of the sum of the weight of waste brick and tile fine aggregate and concrete fine aggregate; the weight of waste glass fiber reinforced plastic fiber accounts for 11.8% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of foam stabilizer accounts for 0.07% of the sum of the weight of waste brick and tile fine aggregate and solid waste-based sulfoaluminate cement and concrete fine aggregate; the weight of air entraining agent accounts for 1500% of the weight of foam stabilizer.

[0135] Comparative Example 7

[0136] A lightweight foamed building material is the same as Example 7, except that sodium dodecyl sulfonate air-entraining agent is used instead of sodium alkylbenzene sulfonate air-entraining agent, and the rest is exactly the same.

[0137] Comparative Example 8

[0138] A lightweight foamed building material is the same as Example 2, except that the stirring rate in step (3) is 50 rpm, and the rest is exactly the same.

[0139] Comparative Example 9

[0140] A lightweight foamed building material is the same as Example 2, except that the stirring rate in step (3) is 2000 rpm, and the rest is exactly the same.

[0141] Performance Testing

[0142] The lightweight foamed building materials prepared in Examples 1 to 17 and Comparative Examples 1 to 9 were tested for density and 28d compressive strength according to JC / T2357-2016 "Test Method for Performance of Foamed Concrete Products", and the anti-cracking performance was evaluated according to JGJ / T317-2014 "Technical Code for Prevention and Control of Cracks in Construction Engineering". The results are shown in Table 1.

[0143] Table 1 Performance

[0144]

[0145] It can be seen from Table 1 above that the composite system formed by the waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder and waste glass fiber reinforced plastic fiber as raw materials in the present invention significantly improves the compressive strength and crack resistance of the lightweight foamed building material. At the same time, the foam stabilizer and the air entraining agent interact with each other, so that the lightweight foamed building material has a lower density without reducing its mechanical properties and crack resistance.

[0146] Compared with Example 4, Comparative Example 1 lacks waste glass fiber reinforced plastic fibers, the density of the lightweight foamed building material increases, and the internal structure and volume stability of the lightweight foamed building material deteriorate, thereby reducing its compressive strength and crack resistance, affecting its durability and performance, and is not conducive to the application of lightweight foamed building materials.

[0147] Compared with Example 2, Comparative Example 2 lacks waste glass powder, and the density of the lightweight foamed building material also increases. At the same time, the performance of the interface transition zone of the lightweight foamed building material decreases, resulting in damage to the overall performance of the material, and reduced compressive strength and crack resistance.

[0148] Compared with Example 7, Comparative Example 3 lacks waste fiberglass fibers and waste glass powder, and the density of the lightweight foamed building materials is also greatly increased. The internal structure, volume and interface transition zone performance of the lightweight foamed building materials are deteriorated, which greatly reduces the compressive strength and crack resistance of the material, resulting in reduced applicability of the lightweight foamed building materials.

[0149] Compared with Example 5, Comparative Example 4 does not contain a foam stabilizer, Comparative Example 5 only uses nano-silica, and Comparative Example 6 only uses a modified silicone resin polyether emulsion, all of which are not conducive to the development of the pore structure of the material, resulting in poor interfacial properties and foam stabilization effect of the lightweight foamed building material, thereby reducing the overall performance of the lightweight foamed building material.

[0150] Compared with Example 7, Comparative Example 7 uses sodium dodecyl sulfate as an air-entraining agent, but its adsorption on the surface of fine bone powder and cement particles is poor, which is not conducive to the stable existence of air bubbles in the material, resulting in many cracks or a large crack area in the lightweight foamed building material.

[0151] Compared with Example 2, too slow stirring rate in Comparative Example 8 and too fast stirring rate in Comparative Example 9 will both affect the overall performance of the lightweight foamed building material. Too slow stirring rate makes the stability of the foam slurry poor, unable to improve the internal structure uniformity of the matrix, and there are phenomena of internal defects and stress concentration, reducing the density, compressive strength and crack resistance of the lightweight foamed building material; although too high stirring rate can improve the uniformity and stability of the slurry, it may also lead to the bursting of bubbles and the generation of micro-cracks, thereby reducing the strength and crack resistance of the concrete.

[0152] In addition, in the compound system of the present invention: the weight of waste glass powder accounts for 13.2 - 17.4% of the sum of the weights of waste brick and tile fine aggregate and concrete fine aggregate, the weight of waste glass fiber reinforced plastic accounts for 11.3 - 13.5% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement and concrete fine aggregate, the weight of the foam stabilizer accounts for 1.3 - 3.1% of the sum of the weights of waste brick and tile fine aggregate, solid waste-based sulfoaluminate cement and concrete fine aggregate, and the weight of the air-entraining agent accounts for 30 - 71.5% of the weight of the foam stabilizer. At this time, the performance of the lightweight foamed building material is more excellent.

[0153] In summary, the lightweight foamed building material prepared by the present invention has good crack resistance and high strength while having a low dry density, improving the application of the lightweight foamed building material.

[0154] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit and basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0155] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A lightweight foamed building material, characterized in that: The invention comprises the following raw materials, calculated in parts by weight: 30-39 parts of waste brick and tile fine aggregate, 26-35 parts of solid waste-based sulphoaluminate cement, 23-30 parts of concrete fine aggregate, 7-12 parts of waste glass powder, 9-14 parts of waste glass fiber reinforced plastics, 0.55-1.15 parts of air entraining agent, 1.05-3.15 parts of foam stabilizer and 0.2-0.35 parts of water reducing agent; wherein the foam stabilizer comprises nano silicon dioxide and modified silicone resin polyether emulsion.

2. The lightweight foamed building material according to claim 1, wherein the weight of the waste glass powder accounts for 13.2-17.4% of the sum of the weight of the waste brick and tile fine aggregate and the concrete fine aggregate.

3. A lightweight foamed building material according to claim 2, wherein the weight of the waste glass fiber reinforced plastics accounts for 11.3-13.5% of the sum of the weight of waste brick and tile fine aggregates and solid waste-based sulphoaluminate cement and concrete fine aggregates.

4. A lightweight foamed building material according to claim 3, wherein the weight of the foam stabilizer accounts for 1.3-3.1% of the sum of the weight of the waste brick and tile fine aggregate and the solid waste-based sulphoaluminate cement and concrete fine aggregate.

5. The lightweight foamed building material according to claim 4, wherein the weight of the air entraining agent accounts for 30-71.5% of the weight of the foam stabilizer. 6 . The lightweight foamed building material according to claim 1 , wherein the air entraining agent is one of sodium rosin acid salt, polyrosin glycerol ester or sodium alkylbenzene sulfonate.

7. A lightweight foamed building material and a preparation method thereof according to claim 1, characterized in that: In the foam stabilizer, the mass ratio of the nano silicon dioxide to the modified silicone resin polyether emulsion is 18-22:

1.

8. The lightweight foamed building material according to claim 1, characterized in that: The water reducer is a polycarboxylate water reducer or a naphthalene water reducer.

9. A method for preparing the lightweight foamed building material according to claim 1, characterized in that: The method comprises the following preparation steps: (1) firstly crushing the waste glass fiber reinforced plastic fiber into a diameter of 1 to 2.5 mm, and then mixing with waste brick and tile fine aggregate, solid waste-based sulphoaluminate cement, concrete fine aggregate, waste glass powder, foam stabilizer nano-silicon dioxide and water reducer, and stirring evenly to obtain a mixed solid powder; (2) mixing an air entraining agent, a foam stabilizer modified silicone resin polyether emulsion and deionized water to obtain a foaming liquid material; (3) mixing the mixed solid powder material and the foaming liquid material, stirring to obtain a foam slurry; (4) The foam slurry is injection molded, cured in a standard curing room until solidified, then demoulded, and then cured to a target age to obtain a lightweight foamed building material.

10. The method for preparing a lightweight foamed building material according to claim 9, characterized in that: The stirring rate of step (3) is 1500-1800 rpm, and the stirring time is 2-3 min.

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