Inorganic artificial stone waste slurry-based artificial aggregate, and preparation method and application thereof

Abstract

The application discloses a kind of based on inorganic artificial stone waste slurry artificial aggregate and its preparation method and application, the artificial aggregate includes the following weight fraction raw material components: cement 18~27 parts, filler 3~17 parts, fine sand 45~65 parts, thickening agent 0.05~0.4 parts, wet waste 12~28 parts and water reducing agent 0.1~3 parts.The artificial aggregate of the application is excellent in performance, and good in decorative property.

Description

Technical Field

[0001] This invention belongs to the field of industrial waste resource utilization, specifically relating to an artificial aggregate based on inorganic artificial stone waste slurry, its preparation method and application. Background Technology

[0002] my country's stone industry generates a large amount of stone waste slurry during stone cutting and processing. Inorganic artificial stone produces a significant amount of muddy water (water + stone powder) during cutting, grinding, and polishing. Currently, the common treatment method involves multi-stage sedimentation followed by filter pressing to form wet stone waste blocks. These blocks primarily consist of minerals such as calcium hydroxide, calcium carbonate, and silicon dioxide, as well as corresponding acid salts produced during the multi-stage sedimentation process through inorganic acid treatment. The wet waste blocks are then further dried and ball-milled to obtain usable stone powder. While this method allows for the reuse of stone waste slurry, it requires multiple steps including sedimentation, filtration, drying, and ball milling, consuming substantial energy and exhibiting low production efficiency.

[0003] Inorganic artificial stone possesses unique decorative properties due to its diverse colors, textures, and aggregates. However, its aggregates are mostly natural precious stones and other distinctive silicate and carbonate minerals, making their price difficult to control and their supply channels unstable. Furthermore, the inherent impurities and instability of the aggregates themselves can cause cracks during production, significantly impacting the aesthetic appeal of the inorganic artificial stone slabs. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an artificial aggregate based on inorganic artificial stone waste slurry, which can increase the diversity of artificial aggregates, reduce the production cost of inorganic artificial stone, increase production efficiency, and greatly reduce the energy consumption required for this step by eliminating the need for drying and crushing wet waste blocks, thus fundamentally reducing environmental pollution.

[0005] The present invention also proposes a method for preparing the above-mentioned artificial aggregate.

[0006] This invention also proposes an inorganic artificial stone.

[0007] The present invention also proposes a method for preparing the above-mentioned inorganic artificial stone.

[0008] According to a first aspect of the present invention, an artificial aggregate based on inorganic artificial stone waste slurry is provided, characterized in that the raw materials for preparing the artificial aggregate comprise the following components in parts by weight:

[0009] The ingredients are: 18-27 parts cement, 3-17 parts filler, 45-65 parts fine sand, 0.05-0.4 parts thickener, 12-28 parts wet waste, and 0.1-3 parts water-reducing agent.

[0010] In some embodiments of the present invention, the raw materials for preparing the artificial aggregate include the following components in parts by weight: 18-22 parts cement, 5-15 parts filler, 45-55 parts fine sand, 0.2-0.4 parts thickener, 15-25 parts wet waste, and 1-2 parts water-reducing agent.

[0011] In some preferred embodiments of the present invention, the raw materials for preparing the artificial aggregate include the following components in parts by weight: 19.14 parts cement, 10.77 parts filler, 48.96 parts fine sand, 0.3 parts thickener, 19.59 parts wet waste and 1.23 parts water-reducing agent.

[0012] In some embodiments of the present invention, the raw materials for preparing the artificial aggregate also include pigments and water.

[0013] In some preferred embodiments of the present invention, the pigment is 1 to 2 parts by weight.

[0014] In some more preferred embodiments of the present invention, the pigment is 1.5 parts by weight.

[0015] In some preferred embodiments of the present invention, the water is 1 to 2 parts by weight.

[0016] In some more preferred embodiments of the present invention, the water comprises 1.5 parts by weight.

[0017] In some embodiments of the present invention, the wet waste includes blocky waste obtained by carbon dioxide aeration and briquetting of inorganic artificial stone slurry.

[0018] In some preferred embodiments of the present invention, the moisture content of the wet waste is 35% to 45%.

[0019] In some more preferred embodiments of the present invention, the moisture content of the wet waste is 38% to 42%.

[0020] In some embodiments of the present invention, the particle size D50 of the powder in the wet waste is 7-12 μm.

[0021] In some preferred embodiments of the present invention, the particle size D50 of the powder in the wet waste is 8 to 11 μm.

[0022] In some more preferred embodiments of the present invention, the particle size D50 of the powder in the wet waste is 9 to 10 μm.

[0023] In some more preferred embodiments of the present invention, the particle size D50 of the powder in the wet waste is 9.6 μm.

[0024] In some embodiments of the present invention, the particle size D90 of the powder in the wet waste is 20-30 μm.

[0025] In some preferred embodiments of the present invention, the particle size D90 of the wet waste is 23-26 μm.

[0026] In some more preferred embodiments of the present invention, the powder particle size D90 of the wet waste is 24.7 μm.

[0027] In some embodiments of the present invention, the blue light whiteness of the wet waste is 80-90.

[0028] In some preferred embodiments of the present invention, the blue light whiteness of the wet waste is 82 to 88.

[0029] In some more preferred embodiments of the present invention, the blue light whiteness of the wet waste is 84.

[0030] In some embodiments of the present invention, the cement includes at least one of ordinary silicate cement, slag silicate cement, pozzolanic silicate cement, fly ash silicate cement, and white silicate cement.

[0031] In some preferred embodiments of the present invention, the cement is white silicate cement.

[0032] In some more preferred embodiments of the present invention, the cement is 52.5 white silicate cement.

[0033] In some embodiments of the present invention, the filler includes at least one selected from kaolin, metakaolin, calcium carbonate powder, and quartz powder.

[0034] In some preferred embodiments of the present invention, the filler is calcium carbonate powder.

[0035] In some more preferred embodiments of the present invention, the particle size of the calcium carbonate powder is 150-250 mesh.

[0036] In some more preferred embodiments of the present invention, the particle size of the calcium carbonate powder is 180-220 mesh.

[0037] In some more preferred embodiments of the present invention, the calcium carbonate powder has a particle size of 200 mesh.

[0038] In some embodiments of the present invention, the fine sand includes calcium carbonate sand.

[0039] In some preferred embodiments of the present invention, the particle size of the calcium carbonate sand is 80-100 mesh.

[0040] In some more preferred embodiments of the present invention, the particle size of the calcium carbonate sand is 85-95 mesh.

[0041] In some more preferred embodiments of the present invention, the calcium carbonate sand has a particle size of 90 mesh.

[0042] In some embodiments of the present invention, the thickener includes at least one of polyacrylamide and cellulose ether.

[0043] In some preferred embodiments of the present invention, the thickener is a cellulose ether.

[0044] In some more preferred embodiments of the present invention, the cellulose ether is hydroxypropyl methylcellulose ether.

[0045] In some embodiments of the present invention, the water-reducing agent includes at least one of polycarboxylate water-reducing agent, lignosulfonate water-reducing agent, naphthalenesulfonate water-reducing agent, aminosulfonate water-reducing agent, and fatty acid water-reducing agent.

[0046] In some preferred embodiments of the present invention, the water-reducing agent is a polycarboxylate water-reducing agent.

[0047] In some embodiments of the present invention, the pigment includes at least one of organic pigments and inorganic pigments.

[0048] In some preferred embodiments of the present invention, the organic pigment includes pigment carbon black.

[0049] In some preferred embodiments of the present invention, the amount of the organic pigment used does not exceed 2% of the total mass of the raw materials used in preparation.

[0050] In some more preferred embodiments of the present invention, the amount of the organic pigment used does not exceed 1% of the total mass of the raw materials used in preparation.

[0051] In some preferred embodiments of the present invention, the inorganic pigment includes at least one of iron yellow, iron red, iron black, and titanium dioxide.

[0052] According to a second aspect of the present invention, a method for preparing the artificial aggregate described in the first aspect of the present invention is provided, the method comprising the following steps:

[0053] S1: Weigh cement, filler, fine sand, thickener, wet waste, water-reducing agent, water and pigment according to the proportion of each raw material group, and mix them evenly to obtain a mixture;

[0054] S2: Shape the mixture described in step S1, and after natural curing, crush it to obtain artificial aggregate.

[0055] In some embodiments of the present invention, the aeration device used in the carbon dioxide aeration technology includes a swirling aerator.

[0056] In some preferred embodiments of the present invention, the number of vortex aerators is 28 to 36.

[0057] In some more preferred embodiments of the present invention, the number of swirling aerators is 30 to 34.

[0058] In some more preferred embodiments of the present invention, the number of swirling aerators is 32.

[0059] In some preferred embodiments of the present invention, the aeration area of ​​the vortex aerator is 0.5–3 m². 2 / indivual.

[0060] In some more preferred embodiments of the present invention, the aeration area of ​​the vortex aerator is 1-2 m². 2 / indivual.

[0061] In some preferred embodiments of the present invention, the aeration rate of a single aerator is 15 to 25 L / min when preparing wet waste.

[0062] In some more preferred embodiments of the present invention, the aeration rate of a single aerator is 20 L / min during the preparation of wet waste.

[0063] In some embodiments of the present invention, the pressure of the briquetting process is 0.4 to 1 MPa.

[0064] In some preferred embodiments of the present invention, the pressure of the pressing process is 0.6 MPa. In some embodiments of the present invention, the pressing process takes 10 to 25 minutes.

[0065] In some preferred embodiments of the present invention, the pressing time is 15 to 20 minutes.

[0066] In some embodiments of the present invention, the natural curing time is 5 to 10 days.

[0067] In some preferred embodiments of the present invention, the natural curing time is 7 to 8 days.

[0068] In some more preferred embodiments of the present invention, the natural curing time is 7 days.

[0069] In some embodiments of the present invention, step S1 includes: first weighing wet waste, water-reducing agent, pigment and water according to the proportion, and mixing them to obtain slurry B; then weighing cement, filler and thickener according to the proportion, and mixing them to obtain main material A; and mixing slurry B and main material A to obtain a mixture.

[0070] In some preferred embodiments of the present invention, the slurry B can be treated by spreading, spraying, etc., as needed, so that the final formed aggregate has a natural stone texture.

[0071] In some preferred embodiments of the present invention, the texturing or spraying treatment involves using a manual or automatic texturing machine to sprinkle 20% of slurry B onto a mixture obtained by adding only 80% slurry B, thereby ultimately creating a texture.

[0072] In some embodiments of the present invention, the molding method in step S2 includes vacuum pressing molding and vibration molding.

[0073] In some preferred embodiments of the present invention, the molding method described in step S2 is vacuum pressing molding.

[0074] In some more preferred embodiments of the present invention, the pressure of the vacuum pressing is 250-300t.

[0075] In some more preferred embodiments of the present invention, the pressure of the vacuum pressing is 300t.

[0076] In some more preferred embodiments of the present invention, the vacuum pressing time is 40 to 80 seconds.

[0077] In some preferred embodiments of the present invention, the vacuum pressing time is 60 seconds.

[0078] In some embodiments of the present invention, step S2 further includes a step of screening after crushing.

[0079] In some preferred embodiments of the present invention, the particle size of the sieved material is 0.5 to 18 mm.

[0080] In some more preferred embodiments of the present invention, the particle size of the sieve is 0.65 to 15 mm.

[0081] According to a third aspect of the present invention, an inorganic artificial stone is provided, wherein the filler aggregate used in the inorganic artificial stone is the artificial aggregate described in the first aspect of the present invention and / or the artificial aggregate prepared by the preparation method described in the second aspect of the present invention.

[0082] In some embodiments of the present invention, the raw materials for preparing the inorganic artificial stone include the following components: white silicate cement, metakaolin, silica fume, calcium powder, aggregate, emulsion, water-reducing agent and nucleating agent.

[0083] In some preferred embodiments of the present invention, the white silicate cement is 52.5 white silicate cement.

[0084] In some preferred embodiments of the present invention, the calcium powder comprises quartz powder of 300-350 mesh and ultrafine calcium powder of 1800-2200 mesh.

[0085] In some more preferred embodiments of the present invention, the particle size of the quartz powder is 320 mesh.

[0086] In some more preferred embodiments of the present invention, the particle size of the ultrafine calcium powder is 2000 mesh.

[0087] In some preferred embodiments of the present invention, the particle size of the metakaolin is 2000 mesh.

[0088] In some preferred embodiments of the present invention, the particle size of the silica fume is 2000 mesh.

[0089] In some preferred embodiments of the present invention, the emulsion includes at least one of styrene-butadiene emulsion, acrylic emulsion, styrene-acrylic emulsion, and EVA emulsion.

[0090] In some more preferred embodiments of the present invention, the emulsion is a styrene-butadiene emulsion.

[0091] In some preferred embodiments of the present invention, the water-reducing agent includes at least one of polycarboxylate water-reducing agent, lignosulfonate water-reducing agent, naphthalenesulfonate water-reducing agent, aminosulfonate water-reducing agent, and fatty acid water-reducing agent.

[0092] In some more preferred embodiments of the present invention, the water-reducing agent is a polycarboxylate water-reducing agent.

[0093] In some more preferred embodiments of the present invention, the water-reducing agent is an early-strength polycarboxylate water-reducing agent.

[0094] In some preferred embodiments of the present invention, the nucleating agent is nano-CSH gel.

[0095] In some embodiments of the present invention, the raw materials for preparing the inorganic artificial stone also include water.

[0096] In some embodiments of the present invention, the inorganic artificial stone has a flexural strength ≥10MPa as tested according to industry standard JC / T 507-2022.

[0097] In some preferred embodiments of the present invention, the inorganic artificial stone has a flexural strength ≥12MPa as tested according to industry standard JC / T 507-2022.

[0098] In some embodiments of the present invention, the compressive strength of the inorganic artificial stone, as tested according to industry standard JC / T 507-2022, is ≥60MPa.

[0099] In some preferred embodiments of the present invention, the compressive strength of the inorganic artificial stone, as tested according to industry standard JC / T 507-2022, is ≥69MPa.

[0100] In some embodiments of the present invention, the inorganic artificial stone, tested according to industry standard JC / T 507-2022, has a water absorption rate of <10‰.

[0101] In some preferred embodiments of the present invention, the inorganic artificial stone has a water absorption rate of <8‰ as tested according to industry standard JC / T 507-2022.

[0102] According to a fourth aspect of the present invention, a method for preparing the inorganic artificial stone described in the third aspect of the present invention is provided, the method comprising the following steps:

[0103] A1: Pour white cement, ultrafine calcium powder, metakaolin, silica fume and calcium powder into a powder hopper and mix them beforehand to obtain a mixed powder;

[0104] A2: Add the aggregate and water to the mixed powder in two batches and mix them. During the mixing process, add the emulsion, water-reducing agent and crystal nucleating agent and continue mixing.

[0105] A3: Pour the mixture after stirring into a mold and vacuum it to set the shape;

[0106] A4: Move the concrete blocks into the curing workshop, insert temperature probes into the surface and sides of the blocks, monitor the temperature changes of the blocks in real time through the concrete wireless temperature measurement system, and insulate the blocks.

[0107] A5: After the square material has completely solidified, remove the mold, cut it into blocks, and polish it to obtain the final product.

[0108] The present invention has at least the following beneficial effects:

[0109] (1) In addition to reducing water content, the water-reducing agent used in this invention can also disperse wet waste. Simple mechanical dispersing cannot completely homogenize blocky waste, while the use of water-reducing agent can improve the uniformity of wet waste, thereby improving the stability and uniformity of artificial aggregates produced later.

[0110] (2) The artificial aggregate prepared by the present invention has excellent performance. The compressive strength of the inorganic artificial stone prepared by the artificial aggregate in the present invention can reach 70MPa. This scheme has certain guidance on the artificial aggregate preparation technology and can be applied to more fields of high-quality utilization of artificial stone waste.

[0111] (3) The present invention avoids problems such as uneven mixing and poor workability of the molded product by mixing the main material and slurry separately; the present invention also improves the ornamental value of inorganic artificial stone slabs by using treatments such as sprinkling and spraying to give the prepared special aggregates special colors and textures.

[0112] (4) This invention uses carbon dioxide aeration technology to acidify inorganic artificial stone waste slurry. While reducing the pH of the waste slurry, it can react to produce light reactive calcium carbonate with stable whiteness and particle size. Its composition is stable and it is suitable for continuous production of inorganic artificial aggregates by disposing of large quantities of waste slurry.

[0113] (5) The present invention uses inorganic artificial stone waste slurry as raw material for recycling and utilization, and does not require subsequent drying and grinding of wet waste, which reduces the energy consumption required for heating during the drying and grinding process, fundamentally reducing environmental pollution and making it low-carbon and environmentally friendly. Attached Figure Description

[0114] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0115] Figure 1 This is a particle size distribution diagram of the wet waste obtained in Example 1 of the present invention, as tested in the test examples of the present invention. Detailed Implementation

[0116] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0117] Example 1

[0118] This embodiment prepares an artificial aggregate based on inorganic artificial stone waste slurry. The preparation process specifically includes the following steps:

[0119] 1) Acidification treatment of waste slurry using carbon dioxide aeration technology to obtain wet waste: 32 vortex aerators are arranged in the wastewater sedimentation system containing inorganic artificial stone waste slurry. Carbon dioxide is introduced into the bottom of the sedimentation tank using the vortex aerators. The coverage area of ​​a single vortex aerator is approximately 1m². 2The aeration rate of a single aerator is maintained at 20L / min for continuous aeration; after acidification treatment, the waste slurry is pressed out into blocky waste through a filter press to obtain wet waste.

[0120] 2) Weigh the raw materials according to the following parts by weight: 19.14 parts of 52.5 white silicate cement, 10.77 parts of 200-mesh calcium carbonate powder, 19.59 parts of wet waste, 48.96 parts of 90-mesh calcium carbonate sand, 1.23 parts of polycarboxylate superplasticizer (Hongqiang, polycarboxylate-based early-strength superplasticizer), 0.3 parts of 60RT-6000 hydroxypropyl methylcellulose ether, 1.5 parts of titanium dioxide, and 1.5 parts of water;

[0121] 3) Mix the wet waste material, polycarboxylate superplasticizer, titanium dioxide and water weighed in step 2) evenly to obtain a slurry;

[0122] 4) Mix the 52.5 white silicate cement, calcium carbonate sand, calcium carbonate powder, and hydroxypropyl methylcellulose ether weighed in step 2) evenly to obtain the main material;

[0123] 5) Add the slurry from step 3) to the main material from step 4) and mix evenly to obtain a mixture; use an automatic texturer to sprinkle 20% of the slurry onto the mixture obtained by mixing only 80% of the slurry to create texture; vacuum press the mixture into shape, and allow it to cure naturally for 7 days (7-8 days is acceptable). Then crush and screen it to obtain an 8-mesh particle size, thus obtaining artificial aggregate based on inorganic artificial stone waste slurry.

[0124] Example 2

[0125] This embodiment prepares an artificial aggregate based on inorganic artificial stone waste slurry. The only difference between this preparation method and that of Example 1 is that titanium dioxide is replaced with an equal mass of iron oxide.

[0126] Example 3

[0127] This embodiment prepares an artificial aggregate based on inorganic artificial stone waste slurry. The only difference between this preparation method and that of Example 1 is that titanium dioxide is replaced with an equal mass of iron oxide.

[0128] Example 4

[0129] This embodiment prepares an artificial aggregate based on inorganic artificial stone waste slurry. The only difference between this preparation method and that of Example 1 is that titanium dioxide is replaced with an equal mass of iron black.

[0130] Example 5

[0131] This embodiment prepares an artificial aggregate based on inorganic artificial stone waste slurry. The only difference between this preparation method and that of Example 1 is that 1.5 parts by weight of titanium dioxide is replaced with 1 part by weight of pigment carbon black.

[0132] Test case

[0133] This experiment tested the particle size distribution of the wet waste material described in step 1) of Example 1 and the physicochemical properties of the artificial aggregate provided in Example 1. It also tested the mechanical properties of the inorganic artificial stone slabs prepared using the artificial aggregates obtained in Examples 1-5. The specific test steps and results are as follows:

[0134] 1. Particle size parameter testing of wet waste:

[0135] The particle size distribution of the wet waste obtained in step 1) of Example 1 was tested using an Omec LS-POP(9) laser particle size analyzer. The results are shown in Table 1 and Table 2. Figure 1 As shown.

[0136] Table 1. Particle size distribution of wet waste

[0137]

[0138] From Table 1 and Figure 1 It can be seen that the particle size D50 of the wet waste prepared by this method is 9.6 μm and the D90 is 24.7 μm. The above results show that the wet waste prepared by this method has uniform particles and very small particle size. Using this waste to prepare artificial aggregate can improve the stability and uniformity of artificial aggregate.

[0139] 2. Physicochemical property tests of the artificial aggregate provided in Example 1:

[0140] According to the test method of national standard GB / T 14685-2011, the physical and chemical properties of the artificial aggregate obtained in Example 1 were tested. The maximum crushing value was 9.7% and the water absorption rate was 1.6%. The artificial aggregate provided by this scheme meets the Class I aggregate standard.

[0141] 3. Mechanical property testing of inorganic artificial stone slabs prepared using the artificial aggregates obtained in Examples 1-5:

[0142] 1) Preparation of inorganic artificial stone slabs for the control group:

[0143] ① The raw materials were weighed according to the following weight percentages: 23.2% of 52.5 white silicate cement, 3.3% of 2000-mesh ultrafine calcium powder, 1.6% of metakaolin, 1.6% of silica fume, 3.3% of 320-mesh quartz powder, and 67% of natural aggregates. Five different types of natural aggregates with the same particle size were selected here, and parallel control groups 1 to 5 with the same preparation method were set up. The natural aggregates used in control groups 1 to 5 were respectively coin flower, jade rabbit beige, Hubei gray jade, Han white jade, and Saanna.

[0144] ② Pour the above-mentioned white cement, ultrafine calcium powder, metakaolin, silica fume, and quartz powder into the powder hopper and mix for 5 minutes. Then, pour the mixed powder and 2 / 3 of the natural aggregate through a sieve into the mixer and mix for 2 minutes. Next, add styrene-butadiene emulsion (at a dosage of 2% of the total powder weight) and mix for 2 minutes. Then, add 2% of the total powder weight of water and 4% of the total powder weight of polycarboxylate early-strength water-reducing agent and mix for 3 minutes. Then, add 4% of the total powder weight of 5℃-10℃ cool water and 3‰ of the total powder weight of nano CSH gel and continue to mix for 5 minutes.

[0145] ③ Pour the mixture into the mold, evacuate for 3 minutes (vacuum degree -0.095MPa), vibrate slightly for 30 seconds at a frequency of 500Hz, then increase the frequency to 2000Hz and vibrate for 60 seconds to complete the molding process.

[0146] ④ Move the material into the curing workshop, insert temperature probes into the surface and sides of the block, and transmit the temperature to the computer control system via wireless signal to monitor the temperature changes at the monitoring points in real time.

[0147] ⑤ Cover the surface of the square material with a thin film. If the highest temperature of the square material exceeds 60°C, cool it down by spraying cold water around the mold and on the surface. When the production temperature of the square material is below 15°C, use a thick canvas to cover the surface for insulation.

[0148] ⑥ After 2 days, the mold was removed and the material was placed in the curing room for 7 days. The square material was then cut into 20mm thick slabs using a gang saw, and then polished to 2000 mesh using a polishing machine to obtain the inorganic artificial stone slabs of the control group.

[0149] 2) Preparation of inorganic artificial stone slabs for the experimental group (i.e., slabs containing the artificial aggregates obtained in Examples 1-5):

[0150] The only difference between its preparation method and the control group is that the natural aggregate is completely or partially replaced with the artificial aggregate prepared in Examples 1 to 5, and the percentage of artificial aggregate in the total aggregate weight is 30%, 60% and 100%, respectively.

[0151] 3) The physicochemical properties of the inorganic artificial stone slabs prepared in steps 1) and 2) were tested according to the industry standard JC / T 507-2022 "Terrazzo for Building Decoration". The results are shown in Tables 2 to 4.

[0152] Table 2. 7-day flexural strength (MPa) of inorganic artificial stone slabs

[0153]

[0154]

[0155] Table 3. 7-day compressive strength (MPa) of inorganic artificial stone slabs

[0156]

[0157] Table 4. Average water absorption rate (%) of inorganic artificial stone slabs

[0158]

[0159] As shown in Tables 2-4, compared to the control group, the artificial aggregate prepared by this method yielded inorganic artificial stone slabs with excellent mechanical properties. The flexural strength reached 15 MPa, with a general flexural strength ≥12 MPa, and the compressive strength reached 70 MPa, with a general compressive strength ≥60 MPa. Simultaneously, the water absorption rate of this slab was <8‰. These results demonstrate that the artificial aggregate provided by this method possesses excellent mechanical properties in addition to its superior aesthetic appeal, making it suitable for widespread use in practical production applications.

[0160] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. An inorganic artificial stone waste slurry-based artificial aggregate, characterized by, The preparation raw materials of the artificial aggregate comprise the following components in parts by weight: cement 18-27 parts, filler 3-17 parts, fine sand 45-65 parts, thickening agent 0.05-0.4 parts, wet waste 12-28 parts, and water reducing agent 0.1-3 parts; the wet waste comprises block-shaped waste prepared by carbon dioxide aeration compaction of inorganic artificial stone waste slurry; the moisture content of the wet waste is 35-45%; the powder particle size D50 in the wet waste is 7-12 μm, and D90 is 20-30 μm; the artificial aggregate is prepared by a preparation method comprising the following steps: S1: cement, filler, fine sand, thickening agent, wet waste, water reducing agent, water, and pigment are weighed according to the allocation ratio of each raw material component, uniformly stirred, and then a mixture is obtained; S2: the mixture in step S1 is formed, crushed after natural curing, and then an artificial aggregate is obtained.

2. Artificial aggregate according to claim 1, characterized in that The cement comprises at least one of ordinary Portland cement, slag Portland cement, pozzolanic Portland cement, fly ash Portland cement, and white Portland cement.

3. Artificial aggregate according to claim 1, characterized in that The filler comprises at least one of kaolin, metakaolin, calcium carbonate powder, and quartz powder.

4. Artificial aggregate according to claim 1, characterized in that The thickening agent comprises at least one of polyacrylamide and cellulose ether; and / or, the water reducing agent comprises at least one of polycarboxylic acid water reducing agent, lignosulfonate water reducing agent, naphthalenesulfonate water reducing agent, aminosulfonate water reducing agent, and fatty acid water reducing agent.

5. Artificial aggregate according to claim 1, characterized in that The preparation raw materials of the artificial aggregate further comprise pigment and water.

6. Artificial aggregate according to claim 5, characterized in that The pigment comprises at least one of organic pigment and inorganic pigment.

7. Artificial aggregate according to claim 6, characterized in that The organic pigment comprises pigment carbon black.

8. Artificial aggregate according to claim 6, characterized in that The inorganic pigment comprises at least one of iron yellow, iron red, iron black, and titanium white powder.

9. Artificial aggregate according to claim 1, characterized in that The time of the natural curing is 5-10 days.

10. An inorganic agglomerate stone, characterized by The filling aggregate used by the inorganic artificial stone is the artificial aggregate according to any one of claims 1-9. The preparation raw materials of the inorganic artificial stone further comprise the following components: white Portland cement, metakaolin, silica fume, calcium powder, emulsion, water reducing agent, and crystal nucleus agent.

11. A method of producing the inorganic agglomerated stone according to claim 10, characterized in that, The preparation method comprises the following steps: A1: white Portland cement, ultra-fine calcium powder, metakaolin, silica fume, and calcium powder are poured into a powder tank and pre-mixed and stirred to obtain mixed powder; A2: the artificial aggregate and water are added into the mixed powder in two batches for mixing and stirring, and the emulsion, water reducing agent, and crystal nucleus agent are added for continuous stirring during the stirring process; A3: the mixture after stirring is poured into a mold, vacuum is extracted, and shaping is completed; A4: the square material is moved into a curing workshop, a temperature probe is inserted into the surface and side edge of the square material, the temperature change of the square material is monitored in real time through a concrete wireless temperature measurement system, and the square material is kept warm; A5: after the square material is completely solidified, the mold is removed, the square material is cut and polished to obtain the final product.

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