Novel masonry material for secondary structure fabricated construction and preparation method of novel masonry material

Abstract

The invention belongs to the field of secondary structure masonry construction, and discloses a secondary structure fabricated construction novel masonry material and a preparation method thereof, the secondary structure fabricated construction novel masonry material comprises the following components: 400 kg / m < 3 > of ordinary Portland cement, 100 kg / m < 3 > of fly ash, 150 kg / m < 3 > of superfine slag powder, 50 kg / m < 3 > of expanded ceramsite, 10 L / m < 3 > of a microbial liquid, 1000 kg / m < 3 > of coarse aggregate, 600 kg / m < 3 > of an auxiliary material, 180 L / m < 3 > of water, and a water reducing agent accounting for 1.5% of the weight of cement; the concrete is prepared from green materials such as the coal ash, the superfine slag powder and the recycled concrete coarse aggregate, consumption of natural resources is reduced while the production cost is reduced, centralized production and one-time forming are achieved in a factory, and the construction quality and construction safety are guaranteed; and flexible adjustment can be carried out according to different environment conditions, so that stable performance of the secondary structure in different environments is ensured.

Description

Technical Field

[0001] The invention belongs to the field of secondary structure masonry construction, and in particular, relates to a new type of masonry material for secondary structure assembly construction and a preparation method thereof. Background Art

[0002] Secondary structure masonry refers to the process of constructing the structural part of a building that mainly bears secondary loads through masonry technology; secondary structure usually includes walls, columns, beams, etc., which are used to support the primary structure (such as main beams, main columns or floor slabs); secondary structure generally does not bear the main structural load, but its stability and strength are still crucial to the safety and durability of the entire building;

[0003] However, traditional secondary structures are constructed by workers on site through masonry construction, which requires a large number of workers and causes redundant waste of resources during the construction process. The masonry materials used have single performance and the green and environmental protection effect is not ideal. Summary of the invention

[0004] The object of the present invention is to provide a new type of masonry material for secondary structure assembly construction and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A new type of masonry material for secondary structure assembly construction, the proportion of which includes: ordinary Portland cement 400kg / m 3 、Fly ash 100kg / m 3 , slag powder 150kg / m 3 , Expanded ceramsite 50kg / m 3 、Microbial liquid 10L / m 3 , coarse aggregate 1000kg / m 3 、Auxiliary materials 600kg / m 3 、Water 180L / m 3 , water reducing agent 1.5% cement weight (6kg / m 3 ).

[0007] kg / m 3 and L / m 3 The interpretation is: every 1m 3 The content of each component in the masonry materials.

[0008] The preparation method of the masonry material comprises the following steps:

[0009] S1. Prepare the materials according to the proportions, and mix the coarse aggregate, slag powder, and expanded ceramsite with the microbial solution respectively;

[0010] S2. Put the solid materials into the mixer according to the designed proportion for dry mixing to ensure that the ingredients are evenly distributed;

[0011] S3. Gradually add water and water reducing agent to the dry mixture and continue stirring until the mixture reaches a uniform wet state.

[0012] Preferably, the microbial liquid comprises two types of mixed bacteria, namely a mixed bacteria of calcium precipitating bacteria and silicate bacteria and a mixed bacteria of lactic acid bacteria and yeast.

[0013] The calcium precipitating bacteria here refer to bacteria that can induce the precipitation of calcium carbonate. Such bacteria are widely present in nature. Through specific biochemical reactions, they can combine calcium ions dissolved in water with carbonate ions to generate water-insoluble calcium carbonate precipitates, such as Bacillus.

[0014] Preferably, the coarse aggregate is recycled concrete with a particle size of 5 to 20 mm.

[0015] Preferably, the mixing operation in step S1 is: mixing the mixed bacteria of calcium precipitating bacteria and silicate bacteria with coarse aggregate, and mixing the mixed bacteria of lactic acid bacteria and yeast with slag powder and expanded ceramsite.

[0016] Preferably, the auxiliary material is EPS particles with a particle size of 0.075-5 mm, and is mixed with 5%-20% volcanic ash and 1%-3% thermal insulation agent.

[0017] Preferably, the auxiliary material is iron ore with a particle size of 5 to 20 mm, and is mixed with 0.6% polypropylene fiber and 1% to 3% foaming agent.

[0018] Preferably, the auxiliary material is a mixture of UHPC and silica fume, and 1% to 2% of antifreeze agent is added.

[0019] The subsequent operation of the masonry material is: pouring the prepared masonry material into a mold to form a secondary structural component, transporting the formed secondary structural component to the construction site, and connecting and fixing the secondary structural component using a quick connection technology.

[0020] Preferably, the primary-molded secondary structural component is tested to ensure that the compressive strength of the structural component is ≥20 MPa, the thermal conductivity is ≤0.1 W / (m·K), and the water absorption is ≤10%.

[0021] Preferably, after the secondary structural components are connected and fixed by using a quick connection technology, gap filling materials are used to process the gaps between the secondary structural components.

[0022] Beneficial effects of the present invention:

[0023] The present invention prepares concrete using green materials such as fly ash, slag powder and recycled concrete coarse aggregate, thereby reducing production costs and the consumption of natural resources. The concrete is then centrally produced in a factory and formed in one step, thereby ensuring construction quality and safety, reducing resource loss during the construction process, saving human resources and reducing project costs.

[0024] The present invention mixes a mixture of calcium precipitating bacteria and silicate bacteria with coarse aggregate before mixing concrete, thereby improving the bonding between the aggregate and the cement matrix, and activating the mixture when tiny cracks appear on the surface or inside of the concrete to produce calcium carbonate to fill the cracks. Then, the mixture of lactic acid bacteria and yeast is mixed with slag powder and expanded ceramsite to enhance the strength and crack resistance of the concrete. The slag powder is evenly distributed in the concrete by utilizing the advantage that the pores between the aggregates can be filled, thereby fully exerting its effect.

[0025] The present invention can flexibly adjust the secondary structure according to different environmental conditions by adjusting the concrete mix ratio and selecting materials, so as to ensure the stable performance of the assembled secondary structure in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 The present invention is a flow chart of the preparation method. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, 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.

[0029] The preparation method flow chart of the present invention is as follows Figure 1 shown.

[0030] Embodiment 1

[0031] This embodiment provides a new type of masonry material for secondary structure assembly construction, the composition ratio includes: ordinary Portland cement 400kg / m 3 、Fly ash 100kg / m 3 , slag powder 150kg / m 3 , Expanded ceramsite 50kg / m 3 、Microbial liquid 10L / m 3 , coarse aggregate 1000kg / m 3 、Auxiliary materials 600kg / m 3 、Water 180L / m3 , water reducing agent 1.5% cement weight.

[0032] Specifically, the preparation steps of masonry materials are as follows:

[0033] S1. Prepare the materials according to the proportions, and mix the coarse aggregate, slag powder, and expanded ceramsite with the microbial solution respectively;

[0034] S2. Put the solid materials into the mixer according to the designed proportion for dry mixing to ensure that the ingredients are evenly distributed;

[0035] S3. Gradually add water and water reducing agent to the dry mixture and continue stirring until the mixture reaches a uniform wet state.

[0036] Specifically, the microbial liquid includes two types of mixed bacteria, namely, a mixed bacteria of Bacillus and silicate bacteria and a mixed bacteria of lactic acid bacteria and yeast.

[0037] Specifically, the coarse aggregate is recycled concrete with a particle size of 5 to 20 mm. The mixing operation in step S1 is: mixing a mixture of calcium precipitating bacteria and silicate bacteria with the coarse aggregate, and mixing a mixture of lactic acid bacteria and yeast with slag powder and expanded ceramsite.

[0038] Specifically, the auxiliary material is EPS particles with a particle size of 0.075-5 mm, and 5%-20% of volcanic ash and 1%-3% of thermal insulation agent are mixed in.

[0039] After the masonry materials are prepared, they are poured into the mold to form secondary structural components at one time, and the formed secondary structural components are transported to the construction site, and the components are connected and fixed using quick connection technology; after the secondary structural components are connected and fixed using the quick connection technology, the gaps between the secondary structural components are processed using caulking materials.

[0040] The primary formed secondary structural components are tested, and the compressive strength of the structural components is ≥20MPa, the thermal conductivity is ≤0.1W / (m·K), and the water absorption is ≤10%.

[0041] Embodiment 2

[0042] This embodiment provides a new type of masonry material for secondary structure assembly construction, the composition ratio includes: ordinary Portland cement 400kg / m 3 、Fly ash 100kg / m 3 , slag powder 150kg / m 3 , Expanded ceramsite 50kg / m 3 、Microbial liquid 10L / m 3 , coarse aggregate 1000kg / m 3 、Auxiliary materials 600kg / m 3 、Water 180L / m3 , water reducing agent 1.5% cement weight.

[0043] Specifically, the preparation steps of masonry materials are as follows:

[0044] S1. Prepare the materials according to the proportions, and mix the coarse aggregate, slag powder, and expanded ceramsite with the microbial solution respectively;

[0045] S2. Put the solid materials into the mixer according to the designed proportion for dry mixing to ensure that the ingredients are evenly distributed;

[0046] S3. Gradually add water and water reducing agent to the dry mixture and continue stirring until the mixture reaches a uniform wet state.

[0047] Specifically, the microbial liquid includes two types of mixed bacteria, namely, a mixed bacteria of Bacillus and silicate bacteria and a mixed bacteria of lactic acid bacteria and yeast.

[0048] Specifically, the coarse aggregate is recycled concrete with a particle size of 5 to 20 mm. The mixing operation in step S1 is: mixing a mixture of calcium precipitating bacteria and silicate bacteria with the coarse aggregate, and mixing a mixture of lactic acid bacteria and yeast with slag powder and expanded ceramsite.

[0049] Specifically, the auxiliary material is iron ore with a particle size of 5 to 20 mm, and 0.6% of polypropylene fiber and 1% to 3% of foaming agent are mixed in at the same time.

[0050] After the masonry materials are prepared, they are poured into the mold to form secondary structural components at one time, and the formed secondary structural components are transported to the construction site, and the components are connected and fixed using quick connection technology; after the secondary structural components are connected and fixed using the quick connection technology, the gaps between the secondary structural components are processed using caulking materials.

[0051] The primary formed secondary structural components are tested, and the compressive strength of the structural components is ≥20MPa, the thermal conductivity is ≤0.1W / (m·K), and the water absorption is ≤10%.

[0052] Embodiment 3

[0053] This embodiment provides a new type of masonry material for secondary structure assembly construction, the composition ratio includes: ordinary Portland cement 400kg / m 3 、Fly ash 100kg / m 3 , slag powder 150kg / m 3 , Expanded ceramsite 50kg / m 3 、Microbial liquid 10L / m 3 , coarse aggregate 1000kg / m 3 、Auxiliary materials 600kg / m 3 、Water 180L / m 3, water reducing agent 1.5% cement weight.

[0054] Specifically, the preparation steps of masonry materials are as follows:

[0055] S1. Prepare the materials according to the proportions, and mix the coarse aggregate, slag powder, and expanded ceramsite with the microbial solution respectively;

[0056] S2. Put the solid materials into the mixer according to the designed proportion for dry mixing to ensure that the ingredients are evenly distributed;

[0057] S3. Gradually add water and water reducing agent to the dry mixture and continue stirring until the mixture reaches a uniform wet state.

[0058] Specifically, the microbial liquid includes two types of mixed bacteria, namely, a mixed bacteria of Bacillus and silicate bacteria and a mixed bacteria of lactic acid bacteria and yeast.

[0059] Specifically, the coarse aggregate is recycled concrete with a particle size of 5 to 20 mm. The mixing operation in step S1 is: mixing a mixture of calcium precipitating bacteria and silicate bacteria with the coarse aggregate, and mixing a mixture of lactic acid bacteria and yeast with slag powder and expanded ceramsite.

[0060] Specifically, the auxiliary material is a mixture of UHPC and silica fume, and 1% to 2% of antifreeze agent is added.

[0061] After the masonry materials are prepared, they are poured into the mold to form secondary structural components at one time, and the formed secondary structural components are transported to the construction site, and the components are connected and fixed using quick connection technology; after the secondary structural components are connected and fixed using the quick connection technology, the gaps between the secondary structural components are processed using caulking materials.

[0062] The primary formed secondary structural components are tested, and the compressive strength of the structural components is ≥20MPa, the thermal conductivity is ≤0.1W / (m·K), and the water absorption is ≤10%.

[0063] From the above, it can be seen that by mixing the mixture of calcium precipitating bacteria and silicate bacteria with coarse aggregate before mixing and preparing concrete, the coarse aggregate will act as a carrier to adsorb the mixed bacteria in the body, and the calcium precipitating bacteria in the mixed bacteria will promote the precipitation of calcium carbonate, improve the adhesion between the aggregate and the cement matrix when mixed, and form a biofilm on the surface of the coarse aggregate particles, thereby enhancing the strength and self-healing ability of the concrete. The silicate bacteria in the mixed bacteria will enhance the compressive strength of the concrete through biomineralization, and will be activated when tiny cracks appear on the surface or inside of the concrete, producing calcium carbonate to fill the cracks and restore the strength and density of the concrete. Improve the utilization effect of recycled concrete, then mix the mixed bacteria of lactic acid bacteria and yeast with slag powder and expanded ceramsite, wherein lactic acid bacteria will produce lactic acid during the fermentation process, thereby promoting the dissolution and precipitation of calcium, further enhancing the strength of concrete, and yeast will produce gas through metabolism, promoting the improvement of the pore structure of concrete, enhancing the crack resistance of concrete, and the mixed bacteria can grow in the tiny pores in slag powder and expanded ceramsite to form a rich microbial community, and then use the advantage of slag powder to fill the pores between aggregates, evenly distributed in the concrete, so as to fully play its role;

[0064] By using EPS particles to replace part of the traditional aggregate, the density of concrete can be effectively reduced. Combined with the added volcanic ash and thermal insulation agent, the thermal conductivity of concrete can be reduced, and the strength and thermal insulation properties can be improved.

[0065] Green materials such as fly ash, slag powder and recycled concrete coarse aggregate are used to prepare concrete, which reduces production costs and the consumption of natural resources. Concrete is then produced in a centralized manner in the factory and formed in one step to ensure the consistency of all secondary structural components, construction quality and safety, while reducing resource loss during the construction process, saving human resources, reducing project costs and improving construction efficiency.

[0066] The present invention is applied to secondary structure masonry construction scenarios. Through pre-assembly production in the factory, the standardization and quality of the secondary structure can be guaranteed, while reducing costs and avoiding waste of resources. By adjusting the secondary structure materials, it can be made more green and environmentally friendly, and can be flexibly adjusted according to different environmental conditions.

[0067] The above specific implementation method part specifically introduces the analytical method involved in the present invention. It should be noted that the above introduction is only to help those skilled in the art better understand the method and ideas of the present invention, rather than limiting the relevant content. Without departing from the principle of the present invention, those skilled in the art may also make appropriate adjustments or modifications to the present invention, and the above adjustments and modifications shall also fall within the scope of protection of the present invention.

Claims

1. A new type of masonry material for secondary structure assembly construction, characterized in that: The mix composition includes: ordinary Portland cement 400kg / m 3 、Fly ash 100kg / m 3 , slag powder 150kg / m 3 , Expanded ceramsite 50kg / m 3 、Microbial liquid 10L / m 3 , coarse aggregate 1000kg / m 3 、Auxiliary materials 600kg / m 3 、Water 180L / m 3 , water reducing agent 6kg / m 3 .

2. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 1, characterized in that: The following steps are involved: S1. Prepare the materials according to the proportions, and mix the coarse aggregate, slag powder, and expanded ceramsite with the microbial solution respectively; S2. Put the solid materials into the mixer according to the designed proportion for dry mixing to ensure that the ingredients are evenly distributed; S3. Gradually add water and water reducing agent to the dry mixture and continue stirring until the mixture reaches a uniform wet state.

3. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The microbial liquid comprises two types of mixed bacteria, namely, a mixed bacteria of calcium precipitating bacteria and silicate bacteria and a mixed bacteria of lactic acid bacteria and yeast.

4. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The coarse aggregate is recycled concrete with a particle size of 5 to 20 mm.

5. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 3, characterized in that: The mixing operation in step S1 is: mixing the mixed bacteria of calcium precipitating bacteria and silicate bacteria with coarse aggregate, and mixing the mixed bacteria of lactic acid bacteria and yeast with slag powder and expanded ceramsite.

6. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The auxiliary material is EPS particles with a particle size of 0.075-5 mm, and 5%-20% of volcanic ash and 1%-3% of thermal insulation agent are mixed in.

7. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The auxiliary material is iron ore with a particle size of 5 to 20 mm, and is mixed with 0.6% polypropylene fiber and 1% to 3% foaming agent.

8. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The auxiliary material is a mixture of UHPC and silica fume, and 1% to 2% of antifreeze agent is added.

9. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 2, characterized in that: The subsequent operation of the masonry material is: pouring the prepared masonry material into a mold to form a secondary structural component, transporting the formed secondary structural component to the construction site, and connecting and fixing the secondary structural component using a quick connection technology.

10. The method for preparing a new type of masonry material for secondary structure assembly construction according to claim 9, characterized in that: After the secondary structural components are connected and fixed by using the quick connection technology, the gaps between the secondary structural components are processed by using a caulking material.

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