CN218812956U - UHPC stone-like building material structure - Google Patents
UHPC stone-like building material structure Download PDFInfo
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Abstract
The utility model provides a UHPC imitative stone building materials structure, including surface course and basal layer, the surface course is located the basal layer top, the surface course is formed by the thick liquids spraying solidification of two kinds at least colours, the surface course has two kinds of colours at least respectively with a plurality of protruding spots of spraying thick liquids colour unanimity, protruding spot random distribution forms the unevenness surface. Compared with the prior art, the UHPC stone-like building material structure prepared by the method has the advantages of concave-convex stereoscopic impression, natural stone texture impression and strong decorative effect; the hardness is high, and the wear-resisting and anti-skidding effects are achieved; and the construction process is simple and the operation is convenient.
Description
Technical Field
The utility model belongs to the building materials field, concretely relates to imitative stone building materials structure of UHPC.
Background
With the development of times and society, the requirements of people on pavement materials are higher and higher, single concrete pavements and asphalt pavements do not meet the increasing life culture requirements of people, and the pavement materials have to be developed in diversification, individuation and functionalization and can embody the aesthetic property and decorative effect.
The stone-like pavement building material is a pavement paving structure for imitating natural stone patterns, colors, textures and appearances, has no radioactive pollution of natural stones, avoids color difference of the natural stones and keeps the textures of the natural stones. Not only can beautify the pavement, but also saves the high cost of adopting the natural stone.
UHPC (Ultra-high Performance Concrete) Ultra-high Performance Concrete is special Concrete with Ultra-high strength, ultra-low water absorption, ultra-high durability and erosion resistance, and if the UHPC material can be made into a stone-like material, the market application range of the UHPC material can be greatly expanded. The stone-like effect of the prior stone-like pavement building material is not real, and the color transition is not natural. Secondly, because of the limit of bearing capacity, the plate with large area size can not be made, and the paving period of the plate is long.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a novel UHPC stone-like building material structure which has concave-convex stereoscopic impression and natural stone texture sense and strong decorative effect; the hardness is high, and the wear-resisting and anti-skidding effects are achieved; and the construction process is simple and the operation is convenient.
The method is realized by the following technical scheme:
a UHPC stone-like building material structure comprises a surface layer and a base layer, wherein the surface layer is positioned above the base layer and is formed by spraying and curing slurry of at least two colors, the surface layer is provided with a plurality of convex spots of at least two colors, the colors of the convex spots are respectively consistent with the colors of the sprayed slurry, and the convex spots are randomly scattered to form an uneven surface.
Furthermore, the average height difference between the highest point and the lowest point on the surface of the surface layer is 0.3-3mm, the diameter of the convex spots is 2-30mm, the surface layer has concave-convex feeling, and the stone imitation effect is vivid.
Furthermore, the surface layer is also provided with a plurality of blended color spots formed by cross blending of the slurries with different colors, so that the surface layer has the effect of imitating stone texture.
Further, the proportion of the color block area of the first color on the surface layer to the total surface area of the surface layer is 25-70%, wherein the first color is a main color preset according to design requirements, and the color block area of the first color is the area of the surface layer exposed to the slurry of the first color after being sprayed and cured.
Furthermore, the total area of the fused color spots accounts for 25-70% of the total area of the surface layer.
Furthermore, the surface layer is also doped with color aggregate particles, the particle size of the color aggregate particles is 0.3-3mm, and the proportion of the color aggregate particles is 5-35%.
Specifically, the color aggregate particles are solid particle raw materials, and the solid particle raw materials are one or more than two of quartz sand, ceramic sand, carborundum or ore sand.
Further, the thickness of the surface layer is 1-30mm, and the surface layer with the thickness of 1-30mm can have enough bearing capacity.
Further, the combustion performance grade of the surface layer is grade A, the abrasion resistance is larger than 1.5, the combustion performance grade is tested according to a GB8624-2012 test method, and the abrasion resistance is tested according to a GB/T16925-1997 test method.
Specifically, the foundation layer is a prefabricated cement-based product or a road cement-based foundation layer.
The utility model discloses compare with conventional imitative stone road surface structure and have following advantage:
1. the color transition between the surface layer color points and the color points is natural, and the texture of the natural stone is presented; the grains of the surface layer have concave-convex stereoscopic impression and strong decorative effect;
2. the hardness is high, and the wear-resisting and anti-skidding effects are achieved;
3. construction is convenient, and the construction period is short.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a structural appearance diagram of a UHPC stone-like building material prepared in example 1;
FIG. 2 is a perspective view of a UHPC stone-like building material prepared in example 1.
Reference numerals:
1-a first color; 2-a second color; 3-fusing the color spots; 4-surface layer; 5-base layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The gel material in the utility model refers to the sum of cement and admixture;
the water-gel ratio in the utility model refers to the ratio of water to gel material.
The utility model discloses a foundation layer can be various cement-based goods such as concrete, the concrete that permeates water, ultra high performance concrete or road cement-based basic unit.
The slurries used in the following examples and comparative examples comprise the following components:
the slurry comprises a gel material, aggregate, pigment and an auxiliary agent, wherein the pigment used in each slurry is different; the gel material comprises 25-50 parts of cement and 7-35 parts of admixture by weight; 25-50 parts of aggregate; the auxiliary agent comprises at least one of a thickening agent, a water reducing agent, a reinforced emulsion, a retarder and a foaming agent;
wherein the pigment is 0-1 wt% of the gel material, the assistant is 0.01-1.5 wt% of the gel material, and the water-gel ratio is 0.14-0.25.
The pigment is selected from titanium dioxide, iron oxide red, iron yellow, chromium oxide green, prussian blue, carbon black inorganic pigment, and at least two of phthalocyanine red, phthalocyanine blue, benzidine yellow and hansa yellow organic pigment.
Example 1
Referring to fig. 1 and 2, the UHPC stone-like building material structure comprises a surface layer 4 and a base layer 5, wherein the surface layer 4 is positioned above the base layer 5, the surface layer 4 is formed by spraying and curing slurry of a first color 1 and a second color 2, and the surface layer 4 is provided with a plurality of convex spots of the first color 1 and the second color 2, and the convex spots are randomly scattered to form an uneven surface.
The average height difference between the highest point and the lowest point on the surface of the surface layer 4 is 0.3-3mm, and the diameter of the convex spots is 2-30mm, so that the surface layer 4 has concave-convex feeling and vivid stone imitation effect.
The surface layer 4 is also provided with a plurality of blended color spots 3 formed by cross blending of the slurries of the first color 1 and the second color 2, the proportion of the total area of the blended color spots 3 to the total area of the surface layer is 30%, so that the surface layer 4 has the effect of imitating stone texture, wherein the first color 1 is white, and the second color 2 is black.
The proportion of the area of the color block of the first color 1 on the surface layer 4 to the total area of the surface layer 4 is 25%, wherein the first color 1 is a main color predetermined according to design requirements, the main color is white in the embodiment, and the area of the color block of the first color 1 is the area of the surface layer 4 exposed on the surface after the slurry of the first color 1 is sprayed and cured.
The surface layer 4 is also doped with color aggregate particles, the particle size of the color aggregate particles is 1-2mm, the proportion is 5-35%, the color aggregate particles are solid particle raw materials, and the solid particle raw materials are one or more than two of quartz sand, ceramic sand, carborundum or ore sand. In other embodiments, the particle size of the color aggregate particles can be between 0.3-1mm and 2-3mm, and the particle size range is selected to be small, so that the stone-like surface can present a fine and smooth effect; the grain size range is large, and the roughness effect can be presented. However, the excessively small particle size can cause the particles to be completely mixed with the slurry, and the particle effect cannot be achieved; if the particle size is too large, the particle size is too large to exhibit the stone-like effect.
The thickness of the surface layer 4 is 15mm, and the surface layer can provide enough bearing capacity for the road surface. In other embodiments, facing layer 4 may also be 1mm, 10mm, 20mm, 30mm, etc.
The combustion performance grade of the surface layer 4 is grade A, the abrasion resistance is more than 1.5, the combustion performance grade is tested according to the GB8624-2012 test method, and the abrasion resistance is tested according to the GB/T169925-1997 test method.
The convex spots of the surface layer 4 are formed by spraying and curing white and black slurry, and each slurry comprises the following components:
the mortar comprises a gel material, aggregates, pigments and an auxiliary agent, wherein the pigments used in each slurry are different;
based on the weight portion of the raw materials,
the gel material comprises 30 parts of cement and 10 parts of admixture;
30 parts of aggregate;
the auxiliary agent comprises a thickening agent, a water reducing agent, a reinforced emulsion, a retarder and a foaming agent;
wherein the pigment is 1% by weight of the gel material, the thickener is 0.2% by weight of the gel material, the water reducing agent is 0.2% by weight of the gel material, the retarder is 0.1% by weight of the gel material, the foaming agent is 0.1% by weight of the gel material, and the water-gel ratio is 0.15.
The UHPC stone-like building material structure is prepared by the following steps:
1) Preparing materials:
according to the weight portion, 30 portions of cement, 10 portions of admixture and 30 portions of aggregate, 1 portion of pigment is gel material, 0.2 portion of thickening agent is gel material, 0.2 portion of water reducing agent is gel material, 0.1 portion of retarder is gel material, 0.1 portion of foaming agent is gel material, and water is prepared according to the water-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium pigment, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
3) Spraying: putting the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer 5 into a dot shape or a granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer 5 into a dot or granular state; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer 5 can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface, and finishing.
After the steps are finished, appearance observation is carried out, and as shown in figures 1 and 2, the stone imitation effect is uniform and natural, and the surface has a concave-convex stereoscopic impression.
Example 2
A UHPC stone-like building material structure comprises a surface layer and a base layer, wherein the surface layer is positioned above the base layer and is formed by spraying and curing slurry of three colors, namely a first color, a second color and a third color, the surface layer is provided with a plurality of convex spots with the same color as the sprayed slurry, and the convex spots are randomly dispersed to form an uneven surface.
The average height difference between the highest point and the lowest point on the surface of the surface layer is 0.3-3mm, the diameter of the convex spots is 2-30mm, the surface layer has concave-convex feeling, and the stone imitation effect is vivid.
The surface layer is also provided with a plurality of fused color spots formed by the crossed fusion of the three slurries with different colors, the total area of the fused color spots accounts for 30 percent of the total area of the surface layer, so that the surface layer has the effect of imitating stone texture, wherein the first color is yellow, the second color is black, and the third color is red.
The proportion of the area of the color block of the first color on the surface layer to the total area of the surface layer is 30%, wherein the first color is a main color predetermined according to design requirements, the main color is yellow in the embodiment, and the area of the color block of the first color is the area of the surface layer exposed by the slurry of the first color sprayed and cured.
The surface layer is also doped with color aggregate particles, the particle size of the color aggregate particles is 0.3-1mm, the proportion is 25%, the color aggregate particles are solid particle raw materials, and the solid particle raw materials are one or more than two of quartz sand, ceramic sand, carborundum or ore sand. In other embodiments, the particle size of the color aggregate particles can be between 1-2mm and 2-3mm, and the particle size range is selected to be small, so that the stone-like surface can present a fine and smooth effect; the grain size range is large, and the roughness effect can be presented. However, the excessively small particle size can cause the particles to be completely mixed with the slurry, and the particle effect cannot be achieved; if the particle size is too large, the particles are too large to exhibit a stone-like effect.
The surface course thickness is 10mm, can provide sufficient bearing capacity for the road surface. In other embodiments, facing layer 4 may also be 1mm, 15mm, 20mm, 30mm, etc. thick.
The combustion performance grade of the surface layer is grade A, the abrasion resistance is more than 1.5, the combustion performance grade is tested according to the GB8624-2012 test method, and the abrasion resistance is tested according to the GB/T169925-1997 test method.
The convex spots of the surface layer are formed by spraying and curing three colors of slurry, and each slurry comprises the following components:
the slurry comprises a gel material, aggregate, pigment and an auxiliary agent, wherein the pigment used in each slurry is different;
based on the weight portion, the weight portion of the material,
the gel material comprises 30 parts of cement and 10 parts of admixture;
30 parts of aggregate;
the auxiliary agent comprises a thickening agent, a water reducing agent, a reinforced emulsion, a retarder and a foaming agent;
wherein the pigment is 0-1% by weight of the gel material, the thickener is 0.01-0.5% by weight of the gel material, the water reducing agent is 0.05-0.5% by weight of the gel material, the retarder is 0.01-0.1% by weight of the gel material, the foaming agent is 0.03-0.3% by weight of the gel material, and the water-gel ratio is 0.14-0.25.
The UHPC stone-like building material structure is prepared by the following steps:
1) Preparing materials:
according to the weight portion, the cement is 30 portions, the admixture is 10 portions, the aggregate is 30 portions, the pigment is 1% of the gel material, the thickening agent is 0.2% of the gel material, the water reducing agent is 0.2% of the gel material, the retarder is 0.1% of the gel material, the foaming agent is 0.1% of the gel material, and the water is prepared according to the water-to-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, iron oxide yellow, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the viscosity of 180 mm;
placing the weighed cement, the admixture, the aggregate, the phthalocyanine red, the auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 180 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry C with the fluidity of 180 mm;
3) Spraying: loading the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.6MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.6MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry C into a multifunctional spraying machine, adjusting the air pressure to be 0.6MPa, and directly and uniformly spraying the UHPC slurry C on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: and naturally maintaining for 1-3 days, and then grinding and polishing the surface of the stone to finish the stone, namely the UHPC stone-like effect.
Comparative example 1
1) Preparing materials:
the cement mortar comprises, by weight, 40 parts of cement, 30 parts of aggregate, 1% of pigment, 0.2% of thickening agent, 0.2% of water reducing agent, 0.1% of retarder and 0.1% of foaming agent, wherein the pigment is gel material, the thickening agent is 0.2% of gel material, the water reducing agent is 0.2% of gel material, the retarder is 0.1% of gel material, and the foaming agent is 0.1% of gel material, and the water is prepared according to the water-to-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, the admixture, the aggregate, the titanium pigment, the auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the viscosity of 150 mm;
placing the weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the viscosity of 150 mm;
3) Spraying: putting the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface of the steel plate, and finishing.
After the steps are finished, appearance observation is carried out, the stone imitation effect is uniform and natural, and the surface has a concave-convex stereoscopic impression.
Comparative example 2
1) Preparing materials:
according to the weight portion, the cement is 30 portions, the admixture is 10 portions, the aggregate is 30 portions, the pigment is 1 portion of the gel material, the thickening agent is 0.2 portion of the gel material, the water reducing agent is 0.2 portion of the gel material, the retarder is 0.1 portion of the gel material, the foaming agent is 0.1 portion of the gel material, and the water is prepared according to the water-to-gel ratio of 0.3.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium dioxide, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
3) Spraying: putting the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface of the steel plate, and finishing.
And (3) appearance observation is carried out after the steps are finished, and due to the fact that the water-to-glue ratio is too large, the slurry becomes very thin, the slurries with different colors can be completely fused into one color, a stone imitation effect cannot be formed, and the surface has no three-dimensional concave-convex feeling.
Comparative example 3
1) Preparing materials:
according to parts by weight, 30 parts of cement, 10 parts of admixture and 30 parts of aggregate, 1% of pigment of the gel material, 0.2% of thickening agent of the gel material, 0.2% of water reducing agent of the gel material, 0.1% of retarder of the gel material, 0.1% of foaming agent of the gel material and prepared water according to the water-to-gel ratio of 0.1.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium pigment, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
3) Spraying: loading the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.42MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface, and finishing.
And (4) carrying out appearance observation after the steps are finished, wherein the water-glue ratio is too small, the slurry is thick, and the finally presented stone-like effect is uneven, unnatural, has no color transition and has a concave-convex stereoscopic impression on the surface.
Comparative example 4
1) Preparing materials:
according to the weight portion, the cement is 30 portions, the admixture is 10 portions, the aggregate is 30 portions, the pigment is 1% of the gel material, the thickening agent is 0.2% of the gel material, the water reducing agent is 0.2% of the gel material, the retarder is 0.1% of the gel material, the foaming agent is 0.1% of the gel material, and the water is prepared according to the water-to-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium pigment, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
3) Spraying: pouring the UHPC slurry A and the UHPC slurry B into a foundation layer; the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface of the steel plate, and finishing.
After the steps are finished, appearance observation is carried out, and due to the fact that the slurry is directly cast and molded on the base layer, the stone imitation effect is uneven, the surface layer is relatively flat, and the concave-convex stereoscopic impression is avoided.
Comparative example 5
The UHPC stone-like building material structure is prepared by the following steps:
1) Preparing materials:
according to parts by weight, 30 parts of cement, 10 parts of admixture and 30 parts of aggregate, 1% of pigment of the gel material, 0.2% of thickening agent of the gel material, 0.2% of water reducing agent of the gel material, 0.1% of retarder of the gel material, 0.1% of foaming agent of the gel material and prepared water according to the water-to-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium pigment, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
3) Spraying: putting the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 1MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 1MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface of the steel plate, and finishing.
And (4) carrying out appearance observation after the steps are finished, wherein the final appearance of the surface layer is free from stone imitation effect due to overhigh spraying air pressure in the spraying step, the surface is relatively flat, and the concave-convex stereoscopic impression is weakened.
Comparative example 6
The UHPC stone-like building material structure is prepared by the following steps:
1) Preparing materials:
according to the weight portion, the cement is 30 portions, the admixture is 10 portions, the aggregate is 30 portions, the pigment is 1% of the gel material, the thickening agent is 0.2% of the gel material, the water reducing agent is 0.2% of the gel material, the retarder is 0.1% of the gel material, the foaming agent is 0.1% of the gel material, and the water is prepared according to the water-to-gel ratio of 0.15.
2) Preparing slurry:
placing the weighed cement, admixture, aggregate, titanium pigment, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry A with the fluidity of 150 mm;
placing weighed cement, admixture, aggregate, carbon black, auxiliary agent and water in a stirrer to be stirred to form UHPC slurry B with the fluidity of 150 mm;
3) Spraying: putting the UHPC slurry A into a multifunctional spraying machine, adjusting the air pressure to be 0.1MPa, and directly and uniformly spraying the UHPC slurry A on the constructed base layer to be in a dot or granular shape; putting the UHPC slurry B into a multifunctional spraying machine, adjusting the air pressure to be 0.1MPa, and directly and uniformly spraying the UHPC slurry B on the constructed base layer to be in a dot or granular shape; the sprayed spots or particles are solidified to form convex spots and particle spots;
the foundation layer can be concrete, pervious concrete, ultra-high performance concrete and other various cement-based products.
4) Curing and post-treatment: naturally curing for 1-3 days, grinding and polishing the surface, and finishing.
And (4) carrying out appearance observation after the steps are finished, wherein the spraying air pressure used in the spraying step is too low, so that the appearance finally presented by the surface layer has no color transition, poor stone imitation effect, unnaturalness and concave-convex stereoscopic impression.
Comparative example 7
The simulated stone UHPC board is prepared by the following steps:
1) Preparation of a component A: adding 30 parts of portland cement, 15 parts of fly ash, 10 parts of mineral powder, 45 parts of quartz sand, 0.75% of titanium dioxide powder by weight of cement, 0.25% of iron oxide yellow by weight of cement, 0.3% of rubber powder by weight of cement and 0.5% of polycarboxylic acid polymer by weight of cement into a stirring pot, stirring for 1min, then adding 7 parts of water, continuously stirring for 10min, and stirring into 0.1-20mm continuous graded semi-dry concrete particles to prepare a component A;
b, preparation of a component: adding 15 parts of portland cement, 8 parts of fly ash, 4 parts of mineral powder, 22 parts of quartz sand, iron oxide red accounting for 0.25% of the weight of the cement, iron yellow accounting for 0.75% of the weight of the cement, rubber powder accounting for 0.3% of the weight of the cement and polycarboxylic acid polymer accounting for 0.5% of the weight of the cement into a stirring pot, performing dry stirring for 1min, then adding 3.5 parts of water, continuously stirring for 10min, and stirring into 0.1-20mm continuous graded semi-dry-mixed concrete particles to prepare a component B;
2) Mixing the component A and the component B prepared in the step 1 in a ratio of 1:5, pouring the mixture into the same stirring pot for 30s, and uniformly mixing to obtain a mixed material;
3) Conveying the mixed material obtained in the step 2) to a distribution box of a block forming device, filling the mixed material into a mold cavity, then continuously injecting the component A prepared in the step 1 into a central area of the mold, wherein the using amount of the injected component A is 20% of the weight of the component B, the vibration frequency is set to 3000 times/minute, the pressing pressure is 15MPa, pressing is carried out for 5s, the block forming device is started, and the mixed material in the mold cavity is vibrated and hydraulically pressed to prepare a 15mm plate;
4) And maintaining at normal temperature for 3 days, grinding and polishing the prepared plate, and finishing to obtain the UHPC plate.
And (5) carrying out appearance observation after the steps are completed. Because the processes are different, the pressing process is adopted in the comparative example 7, and the surface of the prepared plate has no concave-convex stone-like stereoscopic impression; since the raw materials are stirred into a semi-dry concrete particle state, and the raw materials are stirred into slurry in the embodiment 1, the color blending degree of the embodiment 1 is higher than that of the comparative example 7, and the color boundary is not obvious.
The anti-bending performance, the anti-skid performance and the wear resistance of the materials of the examples 1-2 and the comparative examples 1-6 are tested, and the anti-bending performance of the facing layer material is tested according to the standard GB/T17671-1999 method for testing the strength of cement mortar; testing the anti-skid performance according to GB 28635-2012 concrete pavement bricks; polishing the surface layer into a fine and smooth surface, and testing the wear resistance according to the standard GB/T16925-1997 test method for the wear resistance of concrete and products thereof; according to a standard GBT17657-2013 'test method for physicochemical properties of artificial boards and veneered artificial boards', performing an impact resistance test, and observing whether cracks appear on the surface of a test piece; and carrying out the observation of stone-like effect of appearance, and the result is shown in table 1.
TABLE 1 test results
As can be seen from Table 1, the gel materials of comparative example 1 are all cements without admixture, and the flexural, abrasion and impact properties of comparative example 1 are inferior to those of example 1. The water-to-glue ratio of comparative examples 2 and 3 is too large or too small, resulting in far inferior fracture resistance, wear resistance and impact resistance to example 1, and too large, resulting in no stone-like effect, relatively flat surface and no concave-convex stereoscopic impression; the water-to-glue ratio is too small, so that the stone imitation effect is not uniform, and the unnatural color has no transition. Compared with the spraying process used in the example 1, the process of the comparative example 4 which adopts the direct pouring molding process has uneven stone imitation effect, relatively flat surface and no concave-convex stereoscopic impression. The spraying air pressure of the comparative examples 5 and 6 is too high or too low, and the spraying air pressure is too high, so that the stone imitation effect is avoided, the surface is relatively flat, and the concave-convex stereoscopic impression is reduced; if the spraying air pressure is too low, the color is not transited, and the stone imitation effect is poor and unnatural.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A UHPC stone-like building material structure is characterized by comprising a surface layer and a base layer, wherein the surface layer is positioned above the base layer and is formed by spraying and curing slurry of at least two colors, the surface layer is provided with a plurality of convex spots of at least two colors, the colors of the convex spots are respectively consistent with the colors of the sprayed slurry, and the convex spots are randomly scattered to form an uneven surface.
2. A UHPC stone-like building material structure according to claim 1, wherein the average height difference between the highest point and the lowest point of the surface of the facing layer is 0.3-3mm, and the diameter of the spots is 2-30mm.
3. The UHPC stone-like building material structure of claim 1, wherein a proportion of a color patch area of a first color on the facing layer to a total area of the facing layer is 25-70%, wherein the first color is a predetermined main color, and the color patch area of the first color is an area of the facing layer where the slurry of the first color is spray-cured and exposed to the surface.
4. A UHPC stone-like building material structure according to claim 1, wherein the facing thickness is 1-30mm.
5. A UHPC stone-like building material structure according to claim 1, wherein the base layer is a prefabricated cement-based product or a road cement-based base layer.
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