High-performance concrete prepared from muck and production process of high-performance concrete

Abstract

The invention discloses high-performance concrete prepared from muck and a production process of the high-performance concrete, and relates to the technical field of concrete. The high-performance concrete prepared from the muck is characterized in that the high-performance concrete is prepared from cement, the muck, an active agent and water; wherein the weight part ratio of the cement to the muck to the active agent to the water is # imgabs0 #; wherein the # imgabs 1 # is the weight of the muck in unit volume, the # imgabs 2 # is the weight of the cement filled in the void volume of the muck, the # imgabs 3 # is the weight of the active agent filled in the void volume of the cement, and the # imgabs 4 # is the weight of the water determined based on the specific surface areas of the muck, the cement and the active agent. The concrete mix proportion is calculated by adopting a void volume filling method of unit volume; the submicron or nano-scale inorganic filling material is used for compacting pores and playing a role in rolling ball sliding among particles, so that the working performance of the concrete is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete, and in particular to a method of preparing high-performance concrete by utilizing slag and a production process thereof. Background Art

[0002] Concrete is one of the most important civil engineering materials in contemporary times and an important building material, which is widely used in the fields of construction, roads, bridges, etc. In the traditional sense, concrete refers to a general term for engineering composite materials in which aggregates are bonded into a whole by cementitious materials. It refers to an artificial stone material that is prepared in a certain proportion using cementitious materials, coarse aggregates, fine aggregates, water, and admixtures and additives added when necessary, and is evenly stirred, compacted, and hardened.

[0003] Concrete is a gel paste and aggregate that is thrown and dispersed during mixing, and evenly distributed and reorganized under the action of gravity. The cementitious material reacts with water to form a gel to fill the gaps between the aggregates, but the aggregates often hinder the cementitious slurry from evenly and fully filling the gaps. The current concrete mix design method is to calculate by volume weight percentage method on the premise that the mixture meets the construction fluidity and workability and the strength and durability of the mixture after solidification and reaching a certain age. In addition, the aggregate strength, crushing index and grading relationship need to be considered when using concrete materials. The coarse aggregate and fine aggregate selected in the existing aggregates all have clear particle sizes.

[0004] The above method cannot be used for weakly weathered, strongly weathered, fully weathered rocks and various types of abandoned soil, that is, the abandoned soil cannot be used for the preparation of concrete. In order to protect the environment and improve the utilization rate of resources, the present invention proposes a mix ratio theory and production process for the production of slag concrete. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a method for preparing high-performance concrete using slag and a production process thereof, which solves at least one technical problem raised in the background technology.

[0006] (II) Technical solution In order to achieve the above object, the technical solution adopted by the present invention is: A first aspect provides a method for preparing high-performance concrete using slag, wherein the high-performance concrete comprises cement, slag, an active agent and water; The weight ratio of cement, slag, active agent and water is: ; in, is the weight of unit volume of soil, is the weight of cement filled in the void volume of the slag, is the weight of the active agent filled in the void volume of cement, The weight of water is determined based on the specific surface areas of the soil, cement and active agent used.

[0007] Preferably, the void volume of the muck is filled with cement by weight Calculated according to the following formula: ; Among them, the formula is the unit void volume of the slag soil; is the bulk density of cement.

[0008] Preferably, the void volume per unit of the muck Calculated according to the following formula: ; in, The percentage of the slag particle size; is the particle size of the slag; is the type of soil particle size, i=1,2,3,4·········n1.

[0009] Preferably, the unit volume of the soil bulk density Calculated according to the following formula: ; in is the soil moisture content, It is the bulk density of soil.

[0010] Preferably, the void volume of the cement is filled with an active agent by weight Calculated according to the following formula: ; in is the void volume in the cement dosage, is the bulk density of the active agent.

[0011] Preferably, the void volume in the amount of mud is calculated according to the following formula: ; in, ; Cement particles; is the percentage content of cement particle size; is the cement particle size type, i=1,2,3,4········· .

[0012] Preferably, the weight of water is determined based on the specific surface area of ​​the soil, cement and active agent used. The specific method is: ; The required amount of water for packaging; Bulk density of soil; is the moisture content of soil.

[0013] Priority, required package water Calculated according to the following formula: ; in is the total surface area of ​​all particles; is the average thickness of the water film on the surface; is the specific gravity of water; Summary of all particles Calculated according to the following formula: ; in is the surface area of ​​the soil; The surface area of ​​cement used to fill voids in the soil; The surface area of ​​the active agent used to fill the voids in the cement.

[0014] Priority, ; ; ; in, is the type of active agent, i=1,2,3,4········· ; is the particle size of the active agent; is the percentage content of active agent; is the void volume in the cement dosage; is the unit void volume of soil.

[0015] Preferably, the slag includes strongly weathered rock and fully weathered rock, and its particle size is below mm level.

[0016] Preferably, the active agent is a mixture of one or more of magmatic rock powder, sedimentary stone powder, metamorphic rock powder, loess, clay, silt, kaolin, metakaolin, fly ash, and silica fume.

[0017] In a second aspect, a production process for preparing high performance concrete using slag is also provided, wherein the production process comprises the following steps: Step S1: Determine the type of soil and measure the bulk density of the soil used , soil moisture content , the particle size of the slag, and determine the particle size of different slag And percentage content ; Determine cement type and measure cement bulk density , cement particles, and determine the different cement particle sizes And percentage content ; Determine the type of surfactant and measure the bulk density of the surfactant , particle size of the surfactant, and particle diameter of different surfactants And the percentage content is ; Step S2: Calculate according to the void volume filling theory: Unit volume weight of soil , assuming that the void volume in the unit slag is filled with cement, then the weight of cement required in the unit volume of slag is is the void volume per unit volume of soil and The product of the cement bulk density; Assuming that the void volume of cement is filled with active agent, the weight of active agent required is is the void volume in the cement dosage Bulk density of active agent The product of Calculate the specific surface area of ​​the used slag, cement and active agent. According to the calculated specific surface area, set the amount of water required for all solid particle surfaces to be covered by water molecules with a diameter of 1 to 20 nm. The density of water is 1 kg / dm 3 Calculate the weight of water ; Step S3: Mix cement, slag, active agent and water in the following weight ratio: , prepare raw material components, and add the above components to the stirring device in sequence, and adopt coupled stirring of eccentric stirring, vibration stirring and negative pressure stirring; Among them, the stirring speed is 1500-2500 rpm, and stirring is carried out for 3-5 minutes; then the vacuum negative pressure switch in the stirring tank is turned on, and eccentric stirring and vibration stirring are performed while vacuuming and the stirring speed is ensured, and the vacuum pressure gauge is controlled to 0.01-0.09Mpa, and stirring is stopped after 3-5 minutes.

[0018] (III) Beneficial effects The present invention provides a method for preparing high-performance concrete using slag and a production process thereof, which has the following beneficial effects compared with the prior art: (1) The present invention uses cement cementitious materials and materials such as slag, water, etc. through a special mixing method to form slag concrete that meets the working performance, physical and chemical properties, durability and mechanical properties of concrete in use. Slag concrete no longer requires yellow sand and crushed stone, but slag including various types of strongly weathered rocks and fully weathered rocks can be used as particles to form concrete. The concrete mix ratio is calculated by using the void volume filling method per unit volume; submicron or nanometer inorganic filling materials are used to compact the pores and act as a "ball" sliding between particles to improve the working performance of concrete.

[0019] (2) The coupled mixing process of eccentric mixing, vibration mixing and negative pressure mixing can more evenly disperse and couple the cementitious mixture of dense concrete, improve the durability, mechanical properties and other indicators of concrete, and effectively overcome the quality defects of concrete.

[0020] (3) The inorganic active agent is a mixture of one or more of submicron or nano-scale magmatic rock powder, sedimentary stone powder, metamorphic rock powder, loess, clay, silt, kaolin, metakaolin, fly ash, silica fume, attapulgite, calcined bauxite, and calcined gypsum powder to form "balls" that improve working performance and micro-expansion chemical reactions that prevent volume shrinkage during curing to form a solidifying bonding filler. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in combination with specific implementation methods: In the first aspect, the embodiment of the present invention provides a high-performance concrete prepared by using slag soil, which uses cement glue, slag soil, water and other materials through mixing and stirring to form slag soil concrete that meets the working performance, physical and chemical properties, durability and mechanical properties of concrete in use. Slag soil concrete no longer requires yellow sand and gravel. Slag soil uses various types of abandoned soil, including various types of strongly weathered rocks and fully weathered rocks, which can be used as granular materials to form concrete. Specifically, the high-performance concrete includes cement, slag soil, activator and water; The weight ratio of cement, slag, active agent and water is: ; in, is the weight of unit volume of soil, is the weight of cement filled in the void volume of the slag, is the weight of the active agent filled in the void volume of cement, The weight of water is determined based on the specific surface areas of the soil, cement and active agent used.

[0023] Specifically, the calculation method of the mix ratio of the above concrete components is as follows: (1) Muck refers to various types of abandoned soil, including various types of strongly weathered rocks and fully weathered rocks. Its particle size is below mm level, or even below um level. The mix design adopts the void volume filling method calculation theory.

[0024] (2) First, measure the bulk density of the soil used. ; Then measure the particle size of the slag and check the diameter of different particles And percentage content , the void volume per unit volume of soil is calculated by the difference between the unit volume and the volume calculated by the particle diameter Similarly, the void volumes of cement and active agent can be calculated using the same method.

[0025] (3) Then measure the cement bulk density , cement particle diameter And the percentage of each particle size .

[0026] (4) The active agent is a mixture of one or more of submicron or nano-scale magmatic rock powder, sedimentary stone powder, metamorphic rock powder, loess, clay, silt, kaolin, metakaolin, fly ash, silica fume, attapulgite, calcined bauxite, and calcined gypsum powder to form an easy-flowing gelled "ball", which can react with cement under the action of water to form a micro-expansion solidified filler, and its bulk density is measured. , particle diameter And the percentage of each particle size . Calculated according to the void volume filling theory: ①Unit volume weight of slag Assuming that the void volume in the unit slag is filled with cement, the weight of cement required in the unit volume of slag is is the void volume per unit volume of soil Cement density The product of ② The weight of cement calculated theoretically based on the void volume of soil per unit volume , and cement bulk density , cement particle diameter And the percentage of each particle size , the cement void volume in the unit volume of soil void filling cement can be calculated ; ③According to the void volume filling theory, the void volume of cement The medium is filled with submicron or nanometer inorganic admixtures, and the theoretical weight of submicron or nanometer inorganic active agents is is the void volume of the cement Density of active agent The product of .

[0027] (5) To ensure the working effect of the "ball bearing", the nano- or submicron-level inorganic active agent can be adjusted to the theoretical calculated weight according to the working performance test results. 1.0-2.5 times of.

[0028] (6) Calculate the specific surface area of ​​the used slag, cement and surfactant. Based on the calculated specific surface area, assume that the surface of all solid particles is covered by water molecules with a diameter of 1 to 20 nm. The density of water is 1 kg / dm 3 calculate.

[0029] (7) By stirring, the weight of the above nano to submicron inorganic active agent is adjusted on the basis of ensuring the slump of 100-150mm and meeting the strength and durability requirements. and water consumption .

[0030] (8) Mixing ratio of cement, slag, active agent and water per unit void volume: ; Furthermore, the above mix ratio calculation formula is as follows: The weight of cement filled in the void volume of the muck Calculated according to the following formula: ; Among them, the formula is the unit void volume of the slag soil; is the bulk density of cement.

[0031] Unit void volume of soil Calculated according to the following formula: ; in, The percentage of the slag particle size; is the particle size of the slag; is the type of soil particle size, i=1,2,3,4·········n1.

[0032] Unit volume soil bulk density Calculated according to the following formula: ; in is the soil moisture content, It is the bulk density of soil.

[0033] The weight of the active agent filled in the void volume of the cement Calculated according to the following formula: ; in is the void volume in the cement dosage, is the bulk density of the active agent.

[0034] The void volume in the mud dosage is calculated according to the following formula: ; in, ; Cement particles; is the percentage content of cement particle size; is the cement particle size type, i=1,2,3,4········· .

[0035] The weight of water is determined based on the specific surface area of ​​the soil, cement and active agent used. The specific method is: ; The required amount of water for packaging; Bulk density of soil; is the moisture content of soil.

[0036] Required water volume Calculated according to the following formula: ; in is the total surface area of ​​all particles; is the average thickness of the water film on the surface; is the bulk density of water; Summary of all particles Calculated according to the following formula: ; in is the surface area of ​​the soil; The surface area of ​​cement used to fill voids in the soil; The surface area of ​​the active agent used to fill the voids in the cement.

[0037] in: ; ; ; in, is the type of active agent, i=1,2,3,4········· ; is the particle diameter of the active agent; is the percentage content of active agent; is the void volume in the cement dosage; is the unit void volume of soil.

[0038] Furthermore, the production process comprises the following steps: Step S1: Determine the type of soil and measure the bulk density of the soil used , soil moisture content , the particle size of the slag, and determine the particle size of different slag And percentage content ; Determine cement type and measure cement bulk density , cement particles, and determine the different cement particle sizes And percentage content ; Determine the type of surfactant and measure the bulk density of the surfactant , particle size of the surfactant, and particle diameter of different surfactants And the percentage content is ; Step S2: Calculate according to the void volume filling theory: Unit volume weight of soil , assuming that the void volume in the unit slag is filled with cement, then the weight of cement required in the unit volume of slag is is the void volume per unit volume of soil and The product of the cement bulk density; Assuming that the void volume of cement is filled with active agent, the weight of active agent required is is the void volume in the cement dosage Bulk density of active agent The product of Calculate the specific surface area of ​​the used slag, cement and active agent. According to the calculated specific surface area, set the amount of water required for all solid particle surfaces to be covered by water molecules with a diameter of 1 to 20 nm. The density of water is 1 kg / dm 3 Calculate the weight of water ; Step S3: Mix cement, slag, active agent and water in the following weight ratio: , prepare raw material components, and add the above components to the stirring device in sequence, and adopt coupled stirring of eccentric stirring, vibration stirring and negative pressure stirring; Among them, the stirring speed is 1500-2500 rpm, and stirring is carried out for 3-5 minutes; then the vacuum negative pressure switch in the stirring tank is turned on, and eccentric stirring and vibration stirring are performed while vacuuming and the stirring speed is ensured, and the vacuum pressure gauge is controlled to 0.01-0.09Mpa, and stirring is stopped after 3-5 minutes.

[0039] The embodiment of the present invention proposes a theoretical calculation method for the mix ratio of the dense filling of the "void volume" of the granular mixture, which is applicable to the mix ratio design of various aggregates and slag, which will make the concrete more dense, and will significantly improve the durability and mechanical indicators of the concrete. The calculation method adopted in the embodiment of the present invention is calculated according to the particle size distribution of different materials, which can optimize the particle grading, fill the gaps between larger particles in the concrete, make the solid particles form a tighter stack, improve the pore structure, and improve the packing density of the concrete. The displaced filling water is converted into free water, and the thickness of the lubrication layer on the surface of the solid particles is increased.

[0040] The mixing of concrete in the embodiment of the present invention adopts a coupled mixing process of eccentric mixing, vibration mixing and negative pressure mixing, which can more evenly disperse and couple the dense gelled mixture.

[0041] The embodiment of the present invention uses small-diameter nano and submicron additives during stirring and dispersion, which can firstly fill the porosity of the mixture and secondly play the role of "lubricating" the tiny spheres in the mixture, thereby facilitating the fluidity and less water seepage of the concrete cementitious mixture and improving the working performance of the concrete.

[0042] The embodiment of the present invention adopts the method of stirring and vacuuming to greatly reduce the gap distance between concrete particles, reduce the bubbles inside the concrete, and increase the durability and mechanical properties of the concrete.

[0043] Further, detailed embodiments are provided for specific description: Taking tunnel slag as an example, the tunnel slag soil is taken, the soil type is rock soil formed by strongly weathered rock, the cement uses commercially available silicate cement with a strength grade of 42.5r, and kaolin is used as the nano to submicron material active agent.

[0044] Embodiment 1: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 169kg of water were added into the mixing tank in sequence. The mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes, and the vacuum negative pressure was turned on. The vacuum degree was maintained at -0.01Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0045] Embodiment 2: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 169kg of water were added into the mixing tank in sequence. Then, the mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes. The vacuum negative pressure was turned on, and the vacuum degree was maintained at -0.02Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0046] Embodiment 3: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 169kg of water were added into the mixing tank in sequence. The mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes, and the vacuum negative pressure was turned on. The vacuum degree was maintained at -0.03Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0047] Embodiment 4: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 169kg of water were added into the mixing tank in sequence. Then, the mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes. The vacuum negative pressure was turned on, and the vacuum degree was maintained at -0.04Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0048] Comparative Example 1: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 169kg of water were added into the mixing tank in sequence. After eccentric vibration stirring at 1500 rpm for 5 minutes, the concrete was poured out for curing.

[0049] Comparative Example 2: According to the "void volume" dense filling theory calculation formula, 1848kg of tunnel debris and 313kg of cement were weighed, and the above mixture and 160kg of water were added into the mixing tank in sequence. After eccentric vibration stirring at 1500 rpm for 5 minutes, the concrete was poured out for curing.

[0050] Comparative Example 3: According to the "void volume" dense filling theory calculation formula, 1848kg of copper mine waste soil, 321kg of cement, and 29kg of nano to submicron kaolin were weighed, and the above mixture and 173kg of water were added into the mixing tank in sequence. The mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes, and the vacuum negative pressure was turned on. The vacuum degree was maintained at -0.03Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0051] Comparative Example 4: According to the "void volume" dense filling theory calculation formula, 1848kg of mountain soil, 364kg of cement, and 31kg of nano to submicron kaolin were weighed, and the above mixture and 171kg of water were added into the mixing tank in sequence. Then, the mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes, and the vacuum negative pressure was turned on. The vacuum degree was maintained at -0.03Mpa and stirring was continued for 3 minutes. After the vacuum pressure was released, the concrete was poured out for curing.

[0052] Comparative Example 5: Comparative Example 5 is compared with the void volume method, that is, compared with the above Examples 1-4, using the traditional concrete calculation method, using waste soil instead of gravel and sand weight, According to the conventional concrete mix ratio, crushed stone and sand were replaced by waste soil, 1599kg of tunnel debris, 313kg of cement, and 24kg of nano to submicron kaolin were weighed, and the above mixture and 110kg of water were added into the mixing tank in sequence. After eccentric vibration stirring at 1500 rpm for 5 minutes, the concrete was poured out for curing.

[0053] Comparative Example 6: Compared with Comparative Example 5, the negative pressure is increased; The mix ratio was calculated according to conventional concrete, with crushed stone and sand replaced by waste soil. 1599kg of tunnel slag, 313kg of cement, and 24kg of nano to submicron kaolin were weighed. The above mixture and 110kg of water were added into the mixing tank in sequence. The mixture was eccentrically vibrated and stirred at a speed of 1500 rpm for 5 minutes. The vacuum negative pressure was turned on, and the vacuum degree was maintained at -0.01Mpa and stirring was continued for 3 minutes. After the vacuum was released, the concrete was poured out for curing.

[0054] The concrete produced in the above examples and comparative examples was subjected to performance testing using the standard for testing the physical and mechanical properties of concrete (GB / T 50081-2019). The test results are shown in the following table:

[0055] Note: “ / ” in the above table means not detected or no intensity.

[0056] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high performance concrete prepared by using slag, characterized in that: The high performance concrete comprises cement, slag, active agent and water; The weight ratio of cement, slag, active agent and water is: ; in, is the weight of unit volume of soil, is the weight of cement filled in the void volume of the slag, is the weight of the active agent filled in the void volume of cement, The weight of water is determined based on the specific surface areas of the soil, cement and active agent used.

2. The high performance concrete prepared by using slag according to claim 1 is characterized in that: The weight of cement filled in the void volume of the muck Calculated according to the following formula: ； Among them, the formula is the unit void volume of the slag soil; is the bulk density of cement.

3. The high performance concrete prepared by using slag according to claim 2 is characterized in that: Unit void volume of soil Calculated according to the following formula: ； in, The percentage of the slag particle size; is the particle size of the slag; is the type of soil particle size, i=1,2,3,4·········n1.

4. The high performance concrete prepared by using slag according to claim 1 is characterized in that: Unit volume soil bulk density Calculated according to the following formula: ； in is the soil moisture content, It is the bulk density of soil.

5. The high performance concrete prepared by using slag according to claim 1 is characterized in that: The weight of the active agent filled in the void volume of the cement Calculated according to the following formula: ； in is the void volume in the cement dosage, is the bulk density of the active agent.

6. The high performance concrete prepared by using slag according to claim 5 is characterized in that: The void volume in the mud dosage is calculated according to the following formula: ； in, ; Cement particles; is the percentage content of cement particle size; is the cement particle size type, i=1,2,3,4········· .

7. The high performance concrete prepared by using slag according to claim 1 is characterized in that: The weight of water is determined based on the specific surface area of ​​the soil, cement and active agent used. The specific method is: ； The required amount of water for packaging; Bulk density of soil; is the moisture content of soil.

8. The high performance concrete prepared by using slag according to claim 7 is characterized in that: Required water volume Calculated according to the following formula: ； in is the total surface area of ​​all particles; is the average thickness of the water film on the surface; is the bulk density of water; Summary of all particles Calculated according to the following formula: ； in is the surface area of ​​the soil; The surface area of ​​cement used to fill voids in the soil; The surface area of ​​the active agent used to fill the voids in the cement.

9. The high performance concrete prepared by using slag according to claim 8 is characterized in that: ； ； ； in, is the type of active agent, i=1,2,3,4········· ; is the particle diameter of the active agent; is the percentage content of active agent; is the void volume in the cement dosage; is the unit void volume of soil.

10. The high performance concrete prepared by using slag according to any one of claims 1 to 9, characterized in that: The slag includes strongly weathered rock and fully weathered rock, and its particle size is below mm level.

11. The high performance concrete prepared by using slag according to any one of claims 1 to 9, characterized in that: The active agent is a mixture of one or more of magmatic rock powder, sedimentary stone powder, metamorphic rock powder, loess, clay, silt, kaolin, metakaolin, fly ash and silica fume.

12. The production process for preparing high performance concrete using slag according to any one of claims 1 to 11, characterized in that: The production process comprises the following steps: Step S1: Determine the type of soil and measure the bulk density of the soil used , soil moisture content , the particle size of the slag, and determine the particle size of different slag And percentage content ; Determine cement type and measure cement bulk density , cement particles, and determine the different cement particle sizes And percentage content ; Determine the type of surfactant and measure the bulk density of the surfactant , particle size of the surfactant, and particle diameter of different surfactants And the percentage content is ; Step S2: Calculate according to the void volume filling theory: Unit volume weight of soil , assuming that the void volume in the unit slag is filled with cement, then the weight of cement required in the unit volume of slag is is the void volume per unit volume of soil and The product of the cement bulk density; Assuming that the void volume of cement is filled with active agent, the weight of active agent required is is the void volume in the cement dosage Bulk density of active agent The product of Calculate the specific surface area of ​​the used slag, cement and active agent. According to the calculated specific surface area, set the amount of water required for all solid particle surfaces to be covered by water molecules with a diameter of 1 to 20 nm. The density of water is 1 kg / dm 3 Calculate the weight of water ; Step S3: Mix cement, slag, active agent and water in the following weight ratio: , prepare raw material components, and add the above components to the stirring device in sequence, and adopt coupled stirring of eccentric stirring, vibration stirring and negative pressure stirring; Among them, the stirring speed is 1500-2500 rpm, and stirring is carried out for 3-5 minutes; then the vacuum negative pressure switch in the stirring tank is turned on, and eccentric stirring and vibration stirring are performed while vacuuming to ensure the stirring speed, and the vacuum pressure gauge is controlled to 0.01-0.09Mpa, and stirring is stopped after 3-5 minutes.

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