CN110950594A - Environment-friendly concrete and preparation process thereof - Google Patents
Environment-friendly concrete and preparation process thereof Download PDFInfo
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- CN110950594A CN110950594A CN201910944320.5A CN201910944320A CN110950594A CN 110950594 A CN110950594 A CN 110950594A CN 201910944320 A CN201910944320 A CN 201910944320A CN 110950594 A CN110950594 A CN 110950594A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses environment-friendly concrete and a preparation process thereof, relates to the technical field of green concrete, and solves the problem that the overall structural strength of the concrete is greatly reduced because microcracks on the surfaces of concrete waste particles can be continuously expanded and communicated. The environment-friendly concrete comprises the following components in parts by weight: 180 portions of water and 240 portions of water; 400 portions of stone; 750 portions of medium sand and 850 portions of medium sand; portland cement 240-280 parts; 40-80 parts of fly ash; 90-110 parts of mineral powder; 120 portions and 160 portions of concrete waste; 3-5 parts of a water reducing agent; 2-3 parts of a retarder; 4-8 parts of an anti-permeability agent; 6-12 parts of a reinforcing agent; 4-9 parts of rock wool fiber; 10-16 parts of water-soluble fluorosilicone resin; 8-10 parts of isooctyl triethoxysilane. The environment-friendly concrete can keep good and stable structural strength in the application process, and cracks are not easy to generate on the surface.
Description
Technical Field
The invention relates to the technical field of green concrete, in particular to environment-friendly concrete and a preparation process thereof.
Background
The concrete is cement concrete which is prepared by mixing cement as a cementing material, sand and stone as aggregates, water, an additive and an admixture according to a certain proportion and stirring, and is also called ordinary concrete, and is widely applied to civil engineering.
The invention discloses a concrete waste concrete and a preparation method thereof in a Chinese patent with publication number CN104072039A, wherein the concrete waste concrete is prepared from the following raw materials in parts by weight: 40-50 parts of corundum powder, 6-8 parts of barium sulfate ultrafine powder, 50-80 parts of quartz sand, 10-15 parts of asphalt powder, 2-3 parts of 1, 6-hexamethylene diisocyanate, 3-5 parts of acrylic acid, 1-2 parts of sodium methallyl sulfonate, 1-2 parts of ammonium persulfate, 3-5 parts of pentadiene, 2-4 parts of polydiethylene glycol laurate, 160-180 parts of cement, 330-350 parts of broken stone, 180-220 parts of concrete waste, 300-330 parts of sand, a proper amount of water and 20-26 parts of an auxiliary agent; the auxiliary agent is prepared from the following raw materials in parts by weight: 5-6 parts of steel fiber, 2-3 parts of methacrylate, 2-3 parts of isophorone diisocyanate, 4-5 parts of bisphenol A epoxy resin, 3-4 parts of magnesium oxide, 4-5 parts of ethyl acrylate, 0.4-0.7 part of bupleurum oil, 1-2 parts of triethanolamine, 0.6-0.9 part of sodium hydroxide, 0.4-0.6 part of sodium tripolyphosphate, 0.5-0.8 part of styrylphenol polyoxyethylene ether, 0.1-0.2 part of ammonium persulfate, 0.1-0.2 part of potassium persulfate and 9-1 part of water.
In the above application, the concrete waste is used, so that energy is saved and environmental pollution is reduced; the waterproof performance of the concrete is improved by adding asphalt and a high-molecular reaction monomer through reaction; by using the auxiliary agent, the compression strength and the breaking strength of the concrete are increased, the fragrance of the concrete is increased, the antirust performance and the waterproof and anti-seepage performance are good, and the concrete has good water reducing performance, workability, plasticity and pumpability effect. However, after the concrete waste is eroded for a long time, the interior of the concrete waste becomes soft and porous, so that after the concrete waste is broken, a large number of micro cracks exist on the surface of the obtained particles, and after the concrete is subjected to the effects of load, temperature difference and the like, the micro cracks can be continuously expanded and communicated, so that the overall structural strength of the concrete is greatly reduced, and therefore, a new scheme needs to be provided to solve the problems.
Disclosure of Invention
Aiming at the problem that the overall structural strength of a concrete body is greatly reduced due to continuous expansion and communication of micro cracks on the surfaces of concrete waste particles in the prior art, the invention aims to provide environment-friendly concrete to solve the technical problem, and the environment-friendly concrete can keep good and stable structural strength in application and is not easy to generate cracks on the surfaces.
In order to achieve the first purpose, the invention provides the following technical scheme:
the environment-friendly concrete comprises the following components in parts by weight:
180 portions of water and 240 portions of water;
400 portions of stone;
750 portions of medium sand and 850 portions of medium sand;
portland cement 240-280 parts;
40-80 parts of fly ash;
90-110 parts of mineral powder;
120 portions and 160 portions of concrete waste;
3-5 parts of a water reducing agent;
2-3 parts of a retarder;
4-8 parts of an anti-permeability agent;
6-12 parts of a reinforcing agent;
4-9 parts of rock wool fiber;
10-16 parts of water-soluble fluorosilicone resin;
8-10 parts of isooctyl triethoxysilane.
By adopting the technical scheme, the concrete waste is obtained by blasting, recycling, crushing and screening the concrete building, so that the dismantled concrete building can be reused, a large amount of raw materials such as cement and gravel can be saved, the construction waste concrete waste is favorably treated, the environment is protected, and the economic benefit, the social benefit and the environmental benefit are remarkable. The fly ash is an artificial pozzolanic mixed material, has little or no hydraulic gelation property, and chemically reacts with calcium hydroxide or other alkaline earth metal hydroxides to generate a compound with the hydraulic gelation property, so that the environment-friendly concrete keeps good and stable structural strength. The mineral powder can effectively improve the compressive strength of the environment-friendly concrete, reduce the cost of the environment-friendly concrete, inhibit the reaction of alkali aggregate, reduce the hydration heat, reduce the early temperature cracks of the environment-friendly concrete structure, improve the compactness of the environment-friendly concrete, and has obvious effect on improving the anti-seepage and anti-erosion capabilities.
The alkoxy in the isooctyl triethoxysilane can be hydrolyzed and condensed to form a net-shaped membrane structure, and the membrane structures can be partially embedded in the microcracks on the surfaces of the concrete waste particles, so that the environment-friendly concrete has good structural strength. The water-soluble fluorosilicone resin has excellent thermal stability and weather resistance, can be combined with a membrane structure formed by isooctyl triethoxysilane, and is favorable for improving the overall toughness of the membrane structure, meanwhile, the rock wool fibers and the water-soluble fluorosilicone resin have good matching effect, and the water-soluble fluorosilicone resin can enable part of the rock wool fibers to be embedded in the membrane structure and embedded in micro cracks on the surfaces of concrete waste particles, so that the associativity between the concrete waste and other component raw materials is greatly improved, the environment-friendly concrete can keep good and stable structural strength in application, cracks are not easily generated on the surface, and the environment-friendly concrete has good application effect integrally.
Preferably, 5-8 parts by weight of a permeable crystallization material is added into the components of the environment-friendly concrete, the permeable crystallization material is a mixture of a sodium alkyl benzene sulfonate solution, sodium silicate and a methyl potassium silicate solution, and the weight part ratio of the sodium alkyl benzene sulfonate solution to the sodium silicate to the methyl potassium silicate solution is 1: (83-97): (10-15).
By adopting the technical scheme, the permeable crystallization material formed by mixing the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution is added, so that the interface bonding strength between the concrete waste and other component raw materials can be greatly improved, the compact degree between the micro-crack of the concrete waste and the cement is almost the same, and the integral structural strength of the environment-friendly concrete is improved. Meanwhile, the active chemical substances in the permeable crystalline material can react with calcium hydroxide in the concrete to be converted into calcium silicate with gelling property, and micro cracks on the surface of the concrete waste are filled, so that the environment-friendly concrete can still keep good and stable structural strength when being acted by external force, and cracks are not easily generated on the surface of the environment-friendly concrete.
Preferably, 4-9 parts by weight of functional additives are added into the components of the environment-friendly concrete, the functional additives are a mixture of manganese silicon slag and zirconium silicon slag, and the weight part ratio of the manganese silicon slag to the zirconium silicon slag is 1: (1.3-1.7).
By adopting the technical scheme, the functional auxiliary agent formed by mixing the manganese silica slag and the zirconium silica slag can improve the early strength of the environment-friendly concrete, improve the internal structure of the environment-friendly concrete, reduce crack development, and the functional auxiliary agent has good filling property, not only can be partially filled in micro cracks on the surface of concrete waste particles, but also can keep higher interface bonding strength with a membrane structure, can also improve the overall compactness of the environment-friendly concrete, reduce the total porosity of the environment-friendly concrete after setting and hardening, further greatly improve the overall structural strength of the concrete, and can not easily generate cracks in the actual application process, and keep good stability.
More preferably, the water reducing agent is any one of sodium lignosulfonate, sodium sulfite, tannin and sugar calcium.
By adopting the technical scheme, the sodium lignosulfonate, the sodium sulfite, the tannin and the calcium saccharate are good water reducing agents, have good dispersion effect on raw materials of each component of the environment-friendly concrete, can reduce unit water consumption, improve the fluidity of the environment-friendly concrete and improve the compactness of the environment-friendly concrete. Meanwhile, when a plurality of water reducing agents are mixed for use, the bleeding rate of the environment-friendly concrete can be reduced, the stability is good, and the structural strength is kept good and stable in the application process.
More preferably, the retarder is any one of sodium tripolyphosphate, sodium gluconate, sodium citrate and sodium lignosulfonate.
By adopting the technical scheme, the sodium tripolyphosphate, the sodium gluconate, the sodium citrate and the sodium lignosulfonate are good retarders which can generate unstable complexes in the environment-friendly concrete to generate a retarding effect, and the unstable complexes are automatically decomposed along with the progress of a hydration process, so that the hydration is continued to be normally carried out, and the later hydration of the cement is not influenced. The retarder can enable rock wool fibers, water-soluble fluorosilicone resin and isooctyl triethoxysilane to be fully compounded, and the overall quality of the environment-friendly concrete can be guaranteed.
More preferably, the anti-permeability agent is any one of polypropylene reticular fiber, calcium formate, calcium chloride and urea.
By adopting the technical scheme, the polypropylene reticular fiber, the calcium formate, the calcium chloride and the urea are good anti-permeability agents, so that the environment-friendly concrete has good anti-permeability capability on the premise of keeping good structural strength, and further, the environment-friendly concrete can keep good and stable interface bonding strength between the concrete waste and other component raw materials in the use process, and the stability of the environment-friendly concrete is enhanced.
More preferably, the reinforcing agent is one or a mixture of more of brucite fiber, aluminum silicate fiber, iron tailings, limestone and nano silicon carbide.
By adopting the technical scheme, the brucite fiber, the aluminum silicate fiber, the iron tailings, the limestone and the nano silicon carbide are good reinforcing agents, have good dispersibility in the environment-friendly concrete, and have good compatibility with raw materials of all components, so that the overall structural strength of the environment-friendly concrete after curing and forming is greatly improved, and the environment-friendly concrete has good high-temperature resistance, wear resistance and chemical corrosion resistance.
The second purpose of the invention is to provide a preparation process of environment-friendly concrete, and the environment-friendly concrete prepared by the process can keep good and stable structural strength in application and is not easy to generate cracks on the surface.
In order to achieve the second purpose, the invention provides the following technical scheme. The method comprises the following steps:
step one, stirring and drying concrete waste materials in a drying barrel in corresponding weight parts, controlling the temperature at 80-120 ℃, the time at 40-60 min and the stirring speed at 1000-1500 rpm, and screening and removing impurities to obtain dried concrete waste materials;
step two, drying, stirring and mixing the stones, the middlings, the fly ash, the Portland cement, the mineral powder and the reinforcing agent in corresponding parts by weight, controlling the temperature to be 80-120 ℃, the time to be 30-40min, and the stirring speed to be 600-900rpm, cooling, adding the dried concrete waste, and continuously stirring and mixing for 10-20min to obtain a mixture;
step three, uniformly mixing water, a water reducing agent, a retarder and an anti-permeability agent in corresponding parts by weight in a stirring barrel for 7-15min at the stirring speed of 400-600rpm, then adding rock wool fibers, water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continuously stirring for 10-20min to obtain a mixed solution;
and step four, pouring the mixture into the mixed solution for multiple times, and continuously stirring at the stirring speed of 800-1200rpm for 10-15min each time, so as to obtain the environment-friendly concrete.
Through adopting above-mentioned technical scheme, dry the stirring processing with the concrete waste material, can avoid it each other because moisture and adhesion are in the same place, and can drop the soft part on concrete waste material surface to get rid of through the screening, obtain the good stable concrete waste material of quality. The operation is favorable for fully mixing the raw materials of all the components, and the obtained environment-friendly concrete has higher compactness and good impermeability, and has good structural strength after being cured and molded. Meanwhile, the process for preparing the environment-friendly concrete is simple to operate, and can quickly and uniformly mix all components, so that the environment-friendly concrete has high production efficiency, and the overall quality can be guaranteed.
In summary, compared with the prior art, the invention has the following beneficial effects:
(1) isooctyl triethoxysilane, rock wool fiber and water-soluble fluorosilicone resin are added, and the components can have good compounding synergistic effect with each other, and then act on micro cracks on the surfaces of concrete waste particles, so that the binding property between the concrete waste and other component raw materials is greatly improved, and the environment-friendly concrete can keep good and stable structural strength in application, and the surface is not easy to generate cracks, so that the environment-friendly concrete has good application effect as a whole;
(2) the permeable crystallization material formed by mixing the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution is added, so that the interface bonding strength between the concrete waste and other component raw materials can be greatly improved, the environment-friendly concrete can still keep good and stable structural strength when being acted by external force, and the surface of the environment-friendly concrete is not easy to generate cracks;
(3) the functional auxiliary agent formed by mixing the manganese silicon slag and the zirconium silicon slag is added, so that the early strength of the environment-friendly concrete can be improved, the internal structure of the environment-friendly concrete is improved, crack development is reduced, higher interface bonding strength is kept between the functional auxiliary agent and a membrane structure, the overall compactness of the environment-friendly concrete can be improved, the overall structural strength of the concrete is greatly improved, cracks are not easily generated in the actual application process, and good stability can be kept.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: the environment-friendly concrete comprises the following components in parts by weight (kg) shown in Table 1 and is prepared by the following steps:
step one, stirring and drying the concrete waste materials in a drying barrel in corresponding weight parts, controlling the temperature at 100 ℃, the time at 50min and the stirring speed at 1250rpm, and screening and removing impurities to obtain dried concrete waste materials;
step two, drying, stirring and mixing the pebbles, the middlings, the fly ash, the Portland cement, the mineral powder and the brucite fibers in corresponding parts by weight, controlling the temperature at 100 ℃, the time at 35min and the stirring speed at 750rpm, cooling, adding the dried concrete waste, and continuously stirring and mixing for 15min to obtain a mixture;
step three, uniformly mixing water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 11min at a stirring speed of 500rpm, then adding rock wool fibers, water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continuously stirring for 15min to obtain a mixed solution;
and step four, pouring the mixture into the mixed solution for three times according to the equal mass, continuously stirring at the stirring speed of 1000rpm for 12.5min each time, and thus obtaining the environment-friendly concrete.
Example 2: the environment-friendly concrete comprises the following components in parts by weight (kg) shown in Table 1, and is different from example 1 in that the environment-friendly concrete is prepared by the following steps:
step one, stirring and drying the concrete waste materials in a drying barrel in a corresponding weight part, controlling the temperature at 80 ℃, the time at 60min and the stirring speed at 1000rpm, and screening and removing impurities to obtain dried concrete waste materials;
step two, drying, stirring and mixing the pebbles, the middlings, the fly ash, the Portland cement, the mineral powder and the brucite fibers in corresponding parts by weight, controlling the temperature at 80 ℃, the time at 40min and the stirring speed at 600rpm, cooling, adding the dried concrete waste, and continuously stirring and mixing for 10min to obtain a mixture;
step three, uniformly mixing water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 7min at a stirring speed of 600rpm, then adding rock wool fibers, water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continuously stirring for 10min to obtain a mixed solution;
and step four, pouring the mixture into the mixed solution for three times according to the equal mass, continuously stirring at the stirring speed of 800rpm for 15min each time, and thus obtaining the environment-friendly concrete.
Example 3: the environment-friendly concrete comprises the following components in parts by weight (kg) shown in Table 1, and is different from example 1 in that the environment-friendly concrete is prepared by the following steps:
step one, stirring and drying the concrete waste materials in a drying barrel in corresponding weight parts, controlling the temperature at 120 ℃, the time at 40min and the stirring speed at 1500rpm, and screening and removing impurities to obtain dried concrete waste materials;
step two, drying, stirring and mixing the pebbles, the middlings, the fly ash, the Portland cement, the mineral powder and the brucite fibers in corresponding parts by weight, controlling the temperature at 120 ℃, the time at 30min and the stirring speed at 900rpm, cooling, adding the dried concrete waste, and continuously stirring and mixing for 20min to obtain a mixture;
step three, uniformly mixing water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel at a stirring speed of 400rpm for 15min, then adding rock wool fibers, water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continuously stirring for 20min to obtain a mixed solution;
and step four, pouring the mixture into the mixed solution for three times in equal mass, and continuously stirring at the stirring speed of 1200rpm for 10min each time, thus obtaining the environment-friendly concrete.
Examples 4 to 8: an environment-friendly concrete is different from the concrete in example 1 in that the components and the corresponding parts by weight are shown in Table 1.
TABLE 1 Components and parts by weight of examples 1-8
Example 9: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that sodium lignosulfonate in the third step is replaced by sodium sulfite with equal mass.
Example 10: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that sodium lignosulfonate in the step three is replaced by tannin with equal mass.
Example 11: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that sodium lignosulfonate in the step three is replaced by equal-mass calcium saccharate.
Example 12: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that sodium tripolyphosphate in the step three is replaced by sodium gluconate with equal mass.
Example 13: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that sodium tripolyphosphate in the step three is replaced by sodium citrate with equal mass.
Example 14: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that sodium tripolyphosphate in the step three is replaced by sodium lignosulfonate with equal mass.
Example 15: an environment-friendly concrete is different from the concrete in the embodiment 1 in that calcium formate in the step three is replaced by polypropylene reticular fibers with equal mass.
Example 16: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that calcium formate in the third step is replaced by equal mass of urea.
Example 17: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that calcium formate in the step three is replaced by calcium chloride with equal mass.
Example 18: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that the brucite fibers in the step two are replaced by nano silicon carbide with equal mass.
Example 19: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that in the second step, 6 parts by weight of brucite fibers are replaced by 2 parts by weight of aluminum silicate fibers and 4 parts by weight of iron tailings.
Example 20: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that in the second step, 6 parts by weight of brucite fibers are replaced by 2 parts by weight of brucite fibers, 2 parts by weight of aluminum silicate fibers and 2 parts by weight of limestone.
Example 21: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times in equal mass, continuously stir at the stirring speed of 1200rpm for 10min, and then add the permeable crystallization material with the weight part ratio of 6.5, wherein the permeable crystallization material is 1: 90: and (3) stirring and uniformly mixing the mixture of the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution of 12.5 to obtain the environment-friendly concrete.
Example 22: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times in equal mass, continuously stir at the stirring speed of 1200rpm for 10min, and then add 8 parts by weight of permeable crystalline materials, wherein the permeable crystalline materials are prepared by mixing the following materials in a weight ratio of 1: 97: 15, stirring and uniformly mixing the mixture of the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution to obtain the environment-friendly concrete.
Example 23: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times according to equal mass, continuously stir at the stirring speed of 1200rpm for 10min, and then add 5-8 parts by weight of permeable crystalline materials, wherein the permeable crystalline materials are prepared by mixing the following materials in a weight ratio of 1: (83-97): (10-15) stirring and uniformly mixing the mixture of the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution to obtain the environment-friendly concrete.
Example 24: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times in equal mass, continuously stir at the stirring speed of 1200rpm for 10min, and then add the functional additives in 6.5 parts by weight, wherein the ratio of the functional additives in parts by weight is 1: 1.5, stirring and uniformly mixing the mixture of the manganese silicon slag and the zirconium silicon slag to obtain the environment-friendly concrete.
Example 25: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times in equal mass, continuously stir at the stirring speed of 1200rpm for 10min, and then add 4 parts by weight of functional additives, wherein the ratio of the functional additives is 1: 1.3, uniformly stirring and mixing the mixture of the manganese silicon slag and the zirconium silicon slag to obtain the environment-friendly concrete.
Example 26: the environment-friendly concrete is different from the environment-friendly concrete in embodiment 1 in that the step four is specifically set to pour the mixture into the mixed solution in three times in equal mass, continuously stir at a stirring speed of 1200rpm for 10min, and then add 9 parts by weight of functional additives, wherein the ratio of the functional additives is 1: 1.7, stirring and uniformly mixing the mixture of the manganese silicon slag and the zirconium silicon slag to obtain the environment-friendly concrete.
Comparative example 1: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that the step three is specifically set to uniformly mix water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 11min at a stirring speed of 500rpm, then add water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continue to stir for 15min to obtain a mixed solution.
Comparative example 2: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that the step three is specifically set to uniformly mix water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 11min at a stirring speed of 500rpm, then rock wool fiber and isooctyltriethoxysilane are added, and the mixture is continuously stirred for 15min to obtain a mixed solution.
Comparative example 3: the environment-friendly concrete is different from the environment-friendly concrete in the embodiment 1 in that the step three is specifically set to uniformly mix water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 11min at a stirring speed of 500rpm, then adding rock wool fiber and water-soluble fluorosilicone resin, and continuing to stir for 15min to obtain a mixed solution.
Comparative example 4: the environment-friendly concrete is different from the environment-friendly concrete in example 1 in that the step three is specifically set to uniformly mix water, sodium lignosulfonate, sodium tripolyphosphate and calcium formate in corresponding parts by weight in a stirring barrel for 11min at a stirring speed of 500rpm to obtain a mixed solution.
Performance testing
Test samples: the eco-friendly concretes obtained in examples 1 to 26 were used as test samples 1 to 26, and the eco-friendly concretes obtained in comparative examples 1 to 4 were used as control samples 1 to 4.
The test method comprises the following steps: the test samples 1-26 and the reference samples 1-4 are made into standard test blocks according to GB/T50080-2002 'common concrete mixture performance test method', a TYE-3000 computer full-automatic concrete press is adopted, the loading speed of 0.1MPa/s is taken, and the compressive strength of the standard test blocks in 7d, 14d and 28d of maintenance is measured.
And (3) test results: the test results of the test samples 1 to 26 and the control samples 1 to 4 are shown in Table 2. As can be seen from Table 2, the comparison of the test results of the test samples 1-8 and the comparison samples 1-3 shows that the structural strength of the environment-friendly concrete can be improved by adding the isooctyltriethoxysilane, the rock wool fiber and the water-soluble fluorosilicone resin, and the environmental-friendly concrete can play a good role in compounding and enhancing the effect when being mixed for use, thereby greatly improving the compressive strength of the environment-friendly concrete. The comparison of the test results of the test samples 9-20 and the test samples 1-8 can be used, the water reducing agent, the slow release agent, the reinforcing agent and the anti-permeability agent selected and used in the invention are all suitable for preparing the environment-friendly concrete, and the obtained environment-friendly concrete has good and stable compressive strength. The test results of the test samples 21-23, the test samples 24-26 and the test sample 1 are compared respectively to obtain the concrete, and the osmotic crystalline material formed by mixing the sodium alkyl benzene sulfonate solution, the sodium silicate and the methyl potassium silicate solution and the functional additive formed by mixing the manganese silicon slag and the zirconium silicon slag are added, so that the compressive strength of the environment-friendly concrete can be greatly improved, and the whole concrete has good quality.
TABLE 2 test results of test samples 1-26 and control samples 1-4
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The environment-friendly concrete is characterized by comprising the following components in parts by weight:
180 portions of water and 240 portions of water;
400 portions of stone;
750 portions of medium sand and 850 portions of medium sand;
portland cement 240-280 parts;
40-80 parts of fly ash;
90-110 parts of mineral powder;
120 portions and 160 portions of concrete waste;
3-5 parts of a water reducing agent;
2-3 parts of a retarder;
4-8 parts of an anti-permeability agent;
6-12 parts of a reinforcing agent;
4-9 parts of rock wool fiber;
10-16 parts of water-soluble fluorosilicone resin;
8-10 parts of isooctyl triethoxysilane.
2. The environment-friendly concrete according to claim 1, wherein 5-8 parts by weight of a permeable crystalline material is further added to the components of the environment-friendly concrete, the permeable crystalline material is a mixture of a sodium alkyl benzene sulfonate solution, sodium silicate and a methyl potassium silicate solution, and the weight ratio of the sodium alkyl benzene sulfonate solution to the sodium silicate to the methyl potassium silicate solution is 1: (83-97): (10-15).
3. The environment-friendly concrete according to claim 1, wherein 4-9 parts by weight of functional additives are further added into the components of the environment-friendly concrete, the functional additives are a mixture of manganese silica slag and zirconium silica slag, and the weight part ratio of the manganese silica slag to the zirconium silica slag is 1: (1.3-1.7).
4. The environment-friendly concrete according to claim 1, wherein the water reducing agent is any one of sodium lignosulfonate, sodium sulfite, tannin and calcium saccharate.
5. The environment-friendly concrete according to claim 1, wherein the retarder is any one of sodium tripolyphosphate, sodium gluconate, sodium citrate and sodium lignosulfonate.
6. The environment-friendly concrete according to claim 1, wherein the anti-permeability agent is any one of polypropylene mesh fibers, calcium formate, calcium chloride and urea.
7. The environment-friendly concrete as claimed in claim 1, wherein the reinforcing agent is selected from any one or more of brucite fiber, aluminum silicate fiber, iron tailings, limestone and nano silicon carbide.
8. The preparation process of the environment-friendly concrete according to claim 1, which comprises the following steps:
step one, stirring and drying concrete waste materials in a drying barrel in corresponding weight parts, controlling the temperature at 80-120 ℃, the time at 40-60 min and the stirring speed at 1000-1500 rpm, and screening and removing impurities to obtain dried concrete waste materials;
step two, drying, stirring and mixing the stones, the middlings, the fly ash, the Portland cement, the mineral powder and the reinforcing agent in corresponding parts by weight, controlling the temperature to be 80-120 ℃, the time to be 30-40min, and the stirring speed to be 600-900rpm, cooling, adding the dried concrete waste, and continuously stirring and mixing for 10-20min to obtain a mixture;
step three, uniformly mixing water, a water reducing agent, a retarder and an anti-permeability agent in corresponding parts by weight in a stirring barrel for 7-15min at the stirring speed of 400-600rpm, then adding rock wool fibers, water-soluble fluorosilicone resin and isooctyltriethoxysilane, and continuously stirring for 10-20min to obtain a mixed solution;
and step four, pouring the mixture into the mixed solution for multiple times, and continuously stirring at the stirring speed of 800-1200rpm for 10-15min each time, so as to obtain the environment-friendly concrete.
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