Carbon-free solid waste-based eco-cementitious material and method of manufacturing the same

Abstract

The application discloses a kind of carbon-free solid waste-based ecological gel materials, and all the main materials are made of bulk industrial solid waste.The application uses the following technical scheme, a kind of carbon-free solid waste-based ecological gel material for ground surface layer and its manufacturing method, the mass ratio is as follows: steel slag powder 20~40 parts, slag powder 15~45 parts, fly ash 10~25 parts, desulfurization powder 30~50 parts, silica ash 3~8 parts, additive agent leveling agent 0.5 parts, retarder 0.6 parts, defoaming agent 0.2 parts, water retaining agent 0.1 parts, dispersible glue powder 1 part.The above-mentioned material is mixed in dry powder mixing machine and packed in packaging bag, and then directly injected into the ground after stirring with water on site.

Description

Technical Field

[0001] This invention relates to the field of flooring materials technology, specifically to a carbon-free solid waste-based ecological cementitious material and its manufacturing method. Background Technology

[0002] Currently, most floor leveling materials contain volatile organic compounds (VOCs) or are made with high-energy-consuming and high-carbon-emission cementitious materials. These VOCs not only pollute indoor air and cause a decline in air quality, but also pose a great threat to human health. Furthermore, the use of cement-based flooring materials causes significant damage to the original ecological environment of limestone and other minerals during cement production, while also consuming large amounts of electricity and coal. Each ton of cement produced generates approximately 0.75 tons of carbon dioxide emissions, making it a leading contributor to carbon emissions from industrial production. This serious environmental culprit must be curbed, or low-energy-consuming and low-emission raw materials should be used as cementing materials.

[0004] While some similar products made from desulfurized gypsum have emerged in the existing technology, they have significant shortcomings in terms of industrial solid waste utilization rate and performance. The patent described in this invention fully considers how to maximize the utilization of these large quantities of solid waste, as well as the economic and technical indicators and performance of various applications, and the ecological status of green building materials throughout their entire life cycle, thereby aiming for a sustainable, green, and low-carbon building materials industry with the goal of producing carbon-free ecological cementitious materials. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a lightweight, environmentally friendly, carbon-free solid waste-based ecological cementitious material that is made entirely from industrial solid waste with zero carbon emissions, without the use of cement, in response to the above-mentioned technical situation.

[0006] Another technical problem to be solved by the present invention is to provide the above-mentioned carbon-free solid waste-based ecological cementitious material and its manufacturing method, in view of the above-mentioned technical status.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a carbon-free solid waste-based ecological cementitious material and its manufacturing method, characterized in that the carbon-free solid waste-based ecological cementitious material comprises the following components by mass: 25-50 parts of steel slag powder 10-15 parts of desulfurization powder 20-60 parts of slag powder Activator 3%~8%, Retarder 0.1%~0.3%, Defoamer 0.1%~0.2%, Cellulose 0.02%~0.05%, 1%~2% adhesive powder; Preferably, the carbon-free solid waste-based eco-friendly cementitious material comprises the following components by mass: Steel slag powder 20%~30%, Slag powder 25%~50%, Desulfurization powder 20%~30%, Nano-silica 3%~10%.

[0008] A carbon-free solid waste-based eco-friendly cementitious material and its manufacturing method, characterized by comprising the following steps: First, put 25-50 parts of slag powder, 20%-30% of desulfurization powder, 20-30 parts of steel slag powder, and 15-25 parts of fly ash into a dry powder mixer at 0-40℃ until the moisture content is below 3%. Then add 0.1%-0.2% polycarboxylate superplasticizer, 0.1%-0.3% retarder, 0.1%-0.2% defoamer, 0.02%-0.05% cellulose, and 1%-2% adhesive powder and other additives. Stir for 5 minutes and then stop. Then put it into a packaging bag.

[0009] Compared with the prior art, the advantages of the present invention are as follows: (1) Industrial solid waste materials including slag powder, steel slag powder, and desulfurization powder are used. Because the molecular particles of the above solid waste materials have a larger specific surface area and stronger activity than traditional cementitious materials, they are easier to accelerate and fully react during the hydration reaction. In addition, because these minerals contain a large amount of silicon, aluminum, iron, and calcium oxides, they form a variety of crystal structures that interact and overlap, forming a complex interface structure that makes the bonding force between the surfaces tighter and stronger. The exquisite microstructure makes it less prone to early cracking. (2) This technology also uses the addition of desulfurization powder. Calcium sulfate, being an acid, undergoes dehydration and solidification in the air, which differs from the cross-linking reaction of the aforementioned alkaline metal oxides during hydration. In terms of reaction time and process sequence, it is more suitable for controlling two variables. During hydration, it is easier to achieve high-temperature staggered peak control in terms of chemical heat time, so that the material does not generate concentrated heat during use, resulting in excessively high temperatures and defects such as cracks. (3) Another feature of this technology is that it uses all industrial solid waste for mixing, which greatly saves the cementitious materials that consume a lot of energy and emit a lot of carbon dioxide. It has great practical significance in promoting technological progress, improving climate change and human environment, and saving costs for production enterprises as a result of sustainable development. (4) Another feature of this technology is that, due to the use of industrial solid waste with different components, the waterproof performance, compressive strength and wear resistance are greatly improved compared with the use of a single desulfurization powder product. This is especially prominent when used as a surface floor, and it has the characteristics of a high-performance floor paving material. (5) In this technical formula, the added nano silica is used as a fine filler, which effectively improves the performance, strength, toughness and wear resistance of the self-leveling floor. Detailed Implementation

[0010] The present invention will be further described in detail below with reference to the embodiments. Implementation Cases

[0011] Example 1: The manufacturing method of the carbon-free solid waste-based eco-cementing material in this embodiment includes the following steps: (1) After the moisture content of slag powder, steel slag powder, fly ash, and desulfurization powder solid waste is below 3%, put them into the dry powder mixing machine. Then, add the additives, water-reducing agent, retarder, defoamer, water-retaining agent, dispersant, dispersible PVA powder, and nano silica in sequence and mix for 5 minutes until uniform. (2) Place the well-stirred mixture into a packaging bag using packaging equipment for later use; (3) Place the finished product in the packaging bag into a bucket container with 28% of the designed amount of water, and then add the powder while stirring with a high-speed mixer for 1-2 minutes to form a slurry. (4) Clean the site where the floor needs to be laid and apply the floor interface agent. After it is completely dry, spread it on the ground and use a defoaming tool to roll and remove excess air bubbles. After 24 hours, a flat and clean base floor can be presented, which can be used to lay carpets and flooring, or it can be used directly as the final floor layer.

[0012] Example 2: In this embodiment, the carbon-free solid waste-based eco-friendly cementitious material is manufactured, wherein the carbon-free solid waste-based eco-friendly cementitious material comprises the following components by mass: Solid waste-based mineral composition: 20 parts of steel slag powder 25 parts of slag powder 30 parts of desulfurization powder 18 parts fly ash 3 parts nano silica fume; Added auxiliary components: 0.5 parts plasticizer 0.7 parts of retarder, 0.6 parts of defoamer 1 part dispersible colloid powder, 0.01 parts cellulose; The manufacturing method of the carbon-free solid waste-based eco-cementing material in this example includes the following steps: (1) When the moisture content of slag powder, steel slag powder, desulfurization powder, fly ash, and silica fume solid waste reaches less than 3%, put them into the dry powder mixing machine, and add the additives, plasticizers, retarders, defoamers, water-retaining agents, and dispersible adhesive powder in sequence, and mix for 5 minutes until uniform. (2) Place the well-mixed dry mixture into a packaging bag using packaging equipment for later use; (3) Place the finished product from the packaging bag into a bucket container according to the designed water-to-material ratio of 28%, and add the powder while stirring with a high-speed mixer for 1-2 minutes to form a slurry. (4) Clean the site where the base floor needs to be laid and apply the ground interface agent. After it is completely dry, spread it on the ground and use a defoaming tool to roll it to remove air bubbles. After 24 hours, a flat and clean base floor can be presented, which can be used to lay carpets, flooring, or directly as the final decorative floor layer.

[0013] Example 3: The manufacturing process of the carbon-free solid waste-based eco-cementing material in this embodiment: The carbon-free solid waste-based eco-friendly cementitious material comprises the following components by mass: Solid waste-based mineral composition: 20 parts of steel slag powder 30 parts of slag powder 35 parts of desulfurization powder 20 parts fly ash 5 parts nano silica fume; Added auxiliary components: 0.6 parts plasticizer 0.5 parts of retarder, 0.7 parts defoamer 0.1 parts water-retaining agent, 1.5 parts of dispersible adhesive powder; The manufacturing method of the carbon-free solid waste-based eco-cementing material in this example includes the following steps: (1) When the moisture content of slag powder, steel slag powder, desulfurization powder, fly ash, and silica fume solid waste reaches less than 3%, put them into the dry powder mixing machine, and add the additives, plasticizers, retarders, defoamers, water-retaining agents, and dispersible adhesive powder in sequence, and mix for 5 minutes until uniform. (2) Place the well-mixed dry mixture into a packaging bag using packaging equipment for later use; (3) Place the finished product from the packaging bag into a bucket container according to the designed water-to-material ratio of 28%, and add the powder while stirring with a high-speed mixer for 1-2 minutes to form a slurry. (4) Clean the site where the base floor needs to be laid and apply the ground interface agent. After it is completely dry, spread it on the ground and use a defoaming tool to roll it to remove air bubbles. After 24 hours, a flat and clean base floor can be presented, which can be used to lay carpets, flooring, or directly as the final decorative floor layer.

[0014] Example 4 The manufacturing process of the carbon-free solid waste-based eco-cementing material in this embodiment: The carbon-free solid waste-based eco-friendly cementitious material comprises the following components by mass: Solid waste-based mineral composition: 30 parts of steel slag powder 20 parts of slag powder 40 parts of desulfurization powder 15 parts fly ash 8 parts of nano-silica ash; Added auxiliary components: 0.6 parts plasticizer 0.4 parts of retarder, 0.7 parts defoamer 0.1 parts water-retaining agent, 2 parts dispersible adhesive powder; The manufacturing method of the carbon-free solid waste-based eco-cementing material in this example includes the following steps: (1) When the moisture content of slag powder, steel slag powder, desulfurization powder, fly ash, and silica fume solid waste reaches less than 3%, put them into the dry powder mixing machine, and add the additives, plasticizers, retarders, defoamers, water-retaining agents, and dispersible adhesive powder in sequence, and mix for 5 minutes until uniform. (2) Place the well-mixed dry mixture into a packaging bag using packaging equipment for later use; (3) Place the finished product from the packaging bag into a bucket container according to the designed water-to-material ratio of 28%, and add the powder while stirring with a high-speed mixer for 1-2 minutes to form a slurry. (4) Clean the site where the base floor needs to be laid and apply the ground interface agent. After it is completely dry, spread it on the ground and use a defoaming tool to roll it to remove air bubbles. After 24 hours, a flat and clean base floor can be presented, which can be used to lay carpets, flooring, or directly as the final decorative floor layer.

[0015] The performance of the carbon-free solid waste-based eco-cementing material in the above embodiments was tested, and the test results are shown in Table 1.

[0016] According to the tests conducted on JC / T985-2001 cement-based self-leveling mortar for flooring and JC / T1023-2021 gypsum-based self-leveling mortar, its physical and mechanical properties meet the various values ​​of the industry standards.

[0017] Table 1: The numerical values ​​corresponding to different proportions of addition in the material performance Example 1 Example 2 Example 3 Example 4 24-hour pressure resistance / MPa ≥6.5 ≥7.6 ≥8.8 ≥9.6 24-hour flexural strength / MPa ≥2.4 ≥2.6 ≥3.1 ≥3.4 28-day pressure resistance / MPa ≥22 ≥26 ≥28 ≥36 28-day flexural strength / MPa ≥6.5 ≥7.6 ≥7.8 ≥8.8 Flowability / mm ≥142 ≥145 ≥148 ≥150 Bond strength / MPa ≥1.0 ≥1.1 ≥1.2 ≥1.3 Abrasion resistance b / g ≤0.5 ≤0.5 ≤0.45 ≤0.4 .

[0018] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A carbon-free solid waste-based eco-gel material and its manufacturing method, characterized in that... Its weight ratio is as follows: 25-50 parts slag powder, 10-20 parts steel slag powder, 20-30 parts desulfurization powder, 15-25 parts fly ash, 0.1%-0.2% plasticizer, 0.15%-0.3% retarder, 0.2%-0.3% defoamer, 0.02%-0.05% cellulose, and 1%-3% dispersible colloid powder; Its manufacturing process is as follows: Add cementitious materials, carbon fiber, and various additives to a dry-mixed mortar mixer in sequence and mix for 5 minutes. After mixing, the mixture is bagged and weighed using a metering and packaging machine to a weight of 25 kg ± 0.3 kg.

2. The carbon-free solid waste-based ecological gel material and its manufacturing method according to claim 2, characterized in that... The raw materials, by weight, include: 25-50 parts slag powder, 10-20 parts steel slag powder, 20-30 parts desulfurization powder, 15-25 parts fly ash, 0.1%-0.2% plasticizer, 0.15%-0.2% retarder, 0.2%-0.3% defoamer, 0.02%-0.03% cellulose, and 1%-3% dispersible colloid powder.

3. The carbon-free solid waste-based ecological gel material and its manufacturing method according to claim 3, characterized in that... The plasticizer mentioned is a polyhydroxy acid water-reducing agent.

4. The carbon-free solid waste-based ecological gel material and its manufacturing method according to claim 1, characterized in that... The retarder mentioned is tartaric acid.

5. The carbon-free solid waste-based eco-gel material and its manufacturing method according to claim 5, characterized in that... The fly ash quality is Grade 1 fly ash.

6. The carbon-free solid waste-based eco-gel material and its manufacturing method according to claim 6, characterized in that... The specific surface area of ​​steel slag powder is greater than 500 m² / kg.