CN112142390A - Cement stabilizing layer material prepared from construction waste and preparation method thereof - Google Patents
Cement stabilizing layer material prepared from construction waste and preparation method thereof Download PDFInfo
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- CN112142390A CN112142390A CN202010995903.3A CN202010995903A CN112142390A CN 112142390 A CN112142390 A CN 112142390A CN 202010995903 A CN202010995903 A CN 202010995903A CN 112142390 A CN112142390 A CN 112142390A
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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
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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
Abstract
The application discloses utilize cement stable layer material of building rubbish preparation, its raw materials include according to parts by weight: 60-70 parts of coarse aggregate, 50-70 parts of fine aggregate, 10-20 parts of fly ash, 4-8 parts of cement, 6-10 parts of cement additive A, 8-12 parts of cement additive B, 1-3 parts of cement additive C and 1-3 parts of water. The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste. The invention takes the construction waste crushed aggregate as the main material, takes the fly ash, the cement additive A, the cement additive B and the cement additive C as the additives, and the tensile strength and the stress of the material for the cement stabilizing layer are improved under the action of the additives, so that the cement stabilizing layer has excellent mechanical property and thermal property, and the mechanical stability of the cement stabilizing layer can be effectively improved when the cement stabilizing layer is applied to the cement stabilizing layer.
Description
Technical Field
The invention belongs to the technical field of materials for cement stabilizing layers, and particularly relates to a cement stabilizing layer material prepared from construction waste and a preparation method thereof.
Background
The cement stabilized macadam layer is a cement stabilized macadam layer for short, namely cement is adopted to solidify graded macadam, and the cement stabilized macadam layer is compacted and maintained. The water-stable mixing proportion is preliminarily prepared in a laboratory to determine the cement mixing amount and the coarse-fine aggregate proportion and also determine the maximum dry density. The water-stable stirring station can be adopted for mixing when the amount is large.
The water-stable material consists mainly of aggregate and mortar volumes. The aggregate is graded crushed stone, the mortar volume comprises water and a cementing material, and the cementing material consists of cement and a mixed material.
However, most aggregate of the current stable water layer on the market adopts mine crushed stones as raw materials, and construction waste is usually discarded as waste or used for landfill, which causes resource waste, and the stable water layer on the market has poor mechanical property and thermal property when in use, which shortens service life, so that the problem in the prior art needs to be solved by developing a cement stable layer material prepared from construction waste urgently.
Disclosure of Invention
The invention aims to provide a cement stabilizing layer material prepared by utilizing construction waste and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a cement stabilizing layer material prepared from construction waste comprises the following raw materials in parts by weight: 60-70 parts of coarse aggregate, 50-70 parts of fine aggregate, 10-20 parts of fly ash, 4-8 parts of cement, 6-10 parts of cement additive A, 8-12 parts of cement additive B, 1-3 parts of cement additive C and 1-3 parts of water.
Preferably, the cement auxiliary C comprises the following raw materials in parts by weight: 4-8 parts of rice bran wax, 2-5 parts of palm wax, 3-6 parts of corn starch, 5-15 parts of deionized water, 2-5 parts of 3-5% sodium hydroxide solution, 4-8 parts of 3-5% epoxy chloropropane, 2-4 parts of sodium dodecyl benzene sulfonate, 3-6 parts of triethanolamine, 1-4 parts of potassium persulfate, 3-6 parts of ammonium persulfate, 1-5 parts of o-phenylphenol and 3-6 parts of hydroxypropyl methacrylate.
Preferably, the cement auxiliary agent C is prepared by the following process: uniformly mixing rice bran wax, palm wax, corn starch and deionized water, adding 3-5 mass percent of sodium hydroxide solution and 3-5 mass percent of epoxy chloropropane, uniformly mixing, heating to 80-100 ℃, preserving heat for 1-3h, then adding sodium dodecyl benzene sulfonate and triethanolamine, uniformly mixing, heating to 90-110 ℃, preserving heat for 1-3h, then cooling to 60-70 ℃, then adding potassium persulfate, ammonium persulfate, o-phenylphenol and hydroxypropyl methacrylate, uniformly mixing, heating to 80-90 ℃, preserving heat for 0.5-1.5h, cooling to 30-40 ℃, and cooling to room temperature to obtain the cement additive C.
Preferably, the cement aid A is prepared according to the following process: adding 20-30 parts of talcum powder into 100 parts of water according to parts by weight, stirring and heating to 65-75 ℃ at the rotating speed of 100 plus materials at 250r/min, preserving heat for 20-40min, dropwise adding 30-50 parts of citric acid solution for 40-60min, stirring and reacting at the rotating speed of 200 plus materials at 350r/min for 3-5h, filtering and drying to obtain the cement additive A.
Preferably, the cement auxiliary agent B is prepared according to the following process: adding 10-15 parts of nano silicon dioxide into 26-40 parts of toluene according to parts by weight, performing ultrasonic dispersion for 50-60min, adding 3-5 parts of silane coupling agent, performing ultrasonic treatment for 10-15min, heating to 80-85 ℃, performing heat preservation and stirring for 8-10h, cooling, centrifuging, and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 25-40 parts of toluene, heating to 70-75 ℃, and introducing N2Dropwise adding 10-18 parts of ammonium persulfate aqueous solution for 50-60min, then adding 60-80 parts of styrene, adjusting the temperature to 70-75 ℃, keeping the temperature, stirring for 10-15h, carrying out suction filtration, drying, extracting for 10-12h with methanol at 68-75 ℃, extracting for 35-45h with acetone, and drying to obtain the cement additive B.
Preferably, the coarse aggregate is construction waste crushed aggregate obtained by processing a two-stage impact crusher or hammer crusher, the crushing value of the construction waste crushed aggregate is less than or equal to 26%, the needle flake content is less than or equal to 15%, the dust content below 0.075mm is less than or equal to 1.2%, and the soft stone content is less than or equal to 3%; the fine aggregate is natural sand.
Preferably, the gradation range of the mixture formed by mixing the coarse aggregate and the fine aggregate is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste, which comprises the following steps: the coarse aggregate, the fine aggregate and the fly ash are uniformly mixed, dried for 4-8h at the temperature of 120-plus 140 ℃, then crushed into particles of 30-40 meshes, then the cement additive A, the cement additive B, the cement additive C and water are added and uniformly mixed, the temperature is raised to 160 ℃ plus 120 plus, the temperature is kept for 20-40min, the mixture is stirred for 20-40min at the rotating speed of 2500r/min plus 1500 plus, and the mixture is cooled to room temperature to obtain the cement stable layer material prepared by utilizing the construction waste.
The invention has the following beneficial effects:
the cement stabilizing layer material prepared by utilizing the construction wastes is prepared by taking the construction wastes as a main material and taking the fly ash, the cement additive A, the cement additive B and the cement additive C as additives, the tensile strength and the stress of the material for the stabilizing layer are improved under the action of the additives, the cement stabilizing layer material has excellent mechanical property and thermal property, and the mechanical stability of the cement stabilizing layer when the cement stabilizing layer material is applied to the cement stabilizing layer can be effectively improved.
Wherein, the cement additive A has good dispersibility in the cement stabilizing layer material prepared by utilizing the construction waste, the particles of the cement additive A play a role of stress concentration, the strength of the cement additive A is improved by matching with kaolin, the cement additive A can play a role of cross-linking points, when the cement additive A is acted by external force, the cement additive A can radiate energy and absorb external energy, simultaneously, because the uniformly distributed particles can move together with the cement stabilizing layer material prepared by utilizing the construction waste, the tensile property of the cement stabilizing layer material prepared by utilizing the construction waste can be enhanced, the citric acid and the surface of the talcum powder have chemical bonding, the bonding leads the compatibility between the talcum powder and the cement stabilizing layer material body prepared by utilizing the construction waste to be increased, and further improves the impact, tensile property and processing fluidity of the cement stabilizing layer material prepared by utilizing the construction waste, plays a role in toughening and strengthening; in the cement additive B, the nano silicon dioxide has a relatively high dielectric constant, and a silicon dioxide layer can be formed on the surface of the cement stabilizing layer material prepared from the construction wastes after the nano silicon dioxide is filled into the cement stabilizing layer material prepared from the construction wastes, so that a good dielectric effect is achieved, the field intensity breakdown strength of the cement stabilizing layer material prepared from the construction wastes is obviously enhanced, the crystallinity of the cement stabilizing layer material prepared from the construction wastes is improved by adding the cement additive B, the crystallization of the cement stabilizing layer material prepared from the construction wastes is promoted by the modified nano silicon dioxide, out-phase nucleation occurs, the crystal form of the cement stabilizing layer material prepared from the construction wastes is changed, and the mechanical property and the thermal property of the cement stabilizing layer material.
The method comprises the steps of uniformly mixing rice bran wax, palm wax, corn starch and deionized water, adding a sodium hydroxide solution and epoxy chloropropane, uniformly mixing, heating, preserving heat, adding sodium dodecyl benzene sulfonate and triethanolamine, uniformly mixing, heating, preserving heat, cooling, adding potassium persulfate, ammonium persulfate, o-phenyl phenol and hydroxypropyl methacrylate, uniformly mixing, heating, preserving heat, cooling to room temperature to obtain the compound fertilizer, wherein the compound fertilizer is prepared by utilizing the viscosity of the rice bran wax, the palm wax and the corn starch under the alkaline action, adding the epoxy chloropropane to introduce chlorine atoms, realizing the combination with the o-phenyl phenol and the hydroxypropyl methacrylate under the initiation action of the potassium persulfate and the ammonium persulfate, utilizing the unsaturated bonds of the rice bran wax, the palm wax and the corn starch and the unsaturated bonds of the o-phenyl phenol and the hydroxypropyl methacrylate under the grafting action of a silane coupling agent KH-570, the cement stabilizing layer material realizes effective combination with the main material, and further improves the forming effect of the cement stabilizing layer material.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
In an embodiment, the cement stabilizing layer material prepared from the construction waste comprises the following raw materials in parts by weight: 60-70 parts of coarse aggregate, 50-70 parts of fine aggregate, 10-20 parts of fly ash, 4-8 parts of cement, 6-10 parts of cement additive A, 8-12 parts of cement additive B, 1-3 parts of cement additive C and 1-3 parts of water.
The coarse aggregate is a construction waste crushed aggregate obtained by processing a two-stage impact type or hammer type crusher, the crushing value of the construction waste crushed aggregate is less than or equal to 26 percent, the needle flake content is less than or equal to 15 percent, the dust content below 0.075mm is less than or equal to 1.2 percent, and the soft stone content is less than or equal to 3 percent; the fine aggregate is natural sand.
The gradation range of the mixture formed by mixing the coarse aggregate and the fine aggregate is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
The cement additive C is prepared by the following process: uniformly mixing 4-8 parts of rice bran wax, 2-5 parts of palm wax, 3-6 parts of corn starch and 5-15 parts of deionized water according to parts by weight, then adding 2-5 parts of 3-5% sodium hydroxide solution and 4-8 parts of 3-5% epoxy chloropropane by weight, uniformly mixing, heating to 80-100 ℃, keeping the temperature for 1-3 hours, then adding 2-4 parts of sodium dodecyl benzene sulfonate and 3-6 parts of triethanolamine, uniformly mixing, heating to 90-110 ℃, keeping the temperature for 1-3 hours, then cooling to 60-70 ℃, then adding 1-4 parts of potassium persulfate, 3-6 parts of ammonium persulfate, 1-5 parts of o-phenylphenol and 3-6 parts of hydroxypropyl methacrylate, uniformly mixing, heating to 80-90 ℃, keeping the temperature for 0.5 to 1.5 hours, cooling to 30 to 40 ℃, and cooling to room temperature to obtain the cement additive C.
The cement additive A is prepared according to the following process: adding 20-30 parts of talcum powder into 100 parts of water according to parts by weight, stirring and heating to 65-75 ℃ at the rotating speed of 100 plus materials at 250r/min, preserving heat for 20-40min, dropwise adding 30-50 parts of citric acid solution for 40-60min, stirring and reacting at the rotating speed of 200 plus materials at 350r/min for 3-5h, filtering and drying to obtain the cement additive A.
The cement additive B is prepared according to the following process: adding 10-15 parts of nano silicon dioxide into 26-40 parts of toluene according to parts by weight, performing ultrasonic dispersion for 50-60min, adding 3-5 parts of silane coupling agent, performing ultrasonic treatment for 10-15min, heating to 80-85 ℃, performing heat preservation and stirring for 8-10h, cooling, centrifuging, and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 25-40 parts of toluene, heating to 70-75 ℃, and introducing N2Dropwise adding 10-18 parts of ammonium persulfate aqueous solution for 50-60min, then adding 60-80 parts of styrene, adjusting the temperature to 70-75 ℃, keeping the temperature, stirring for 10-15h, carrying out suction filtration, drying, extracting for 10-12h with methanol at 68-75 ℃, extracting for 35-45h with acetone, and drying to obtain the cement additive B.
The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste, which comprises the following steps: the coarse aggregate, the fine aggregate and the fly ash are uniformly mixed, dried for 4-8h at the temperature of 120-plus 140 ℃, then crushed into particles of 30-40 meshes, then the cement additive A, the cement additive B, the cement additive C and water are added and uniformly mixed, the temperature is raised to 160 ℃ plus 120 plus, the temperature is kept for 20-40min, the mixture is stirred for 20-40min at the rotating speed of 2500r/min plus 1500 plus, and the mixture is cooled to room temperature to obtain the cement stable layer material prepared by utilizing the construction waste.
Example 1
A cement stabilizing layer material prepared from construction waste comprises the following raw materials in parts by weight: 65 parts of coarse aggregate, 60 parts of fine aggregate, 15 parts of fly ash, 6 parts of cement, 8 parts of cement additive A, 10 parts of cement additive B, 2 parts of cement additive C and 2 parts of water.
The coarse aggregate is a construction waste crushed aggregate obtained by processing a two-stage impact type or hammer type crusher, the crushing value of the construction waste crushed aggregate is less than or equal to 26 percent, the needle flake content is less than or equal to 15 percent, the dust content below 0.075mm is less than or equal to 1.2 percent, and the soft stone content is less than or equal to 3 percent; the fine aggregate is natural sand.
The gradation range of the mixture formed by mixing the coarse aggregate and the fine aggregate is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
The cement additive C is prepared by the following process: uniformly mixing 6 parts of rice bran wax, 3.5 parts of palm wax, 4.5 parts of corn starch and 10 parts of deionized water in parts by weight, adding 3.5 parts of 4% sodium hydroxide solution in mass fraction and 6 parts of 4% epoxy chloropropane in mass fraction, uniformly mixing, heating to 90 ℃, preserving heat for 2 hours, adding 3 parts of sodium dodecyl benzene sulfonate and 4.5 parts of triethanolamine, uniformly mixing, heating to 100 ℃, preserving heat for 2 hours, cooling to 65 ℃, adding 2.5 parts of potassium persulfate, 4.5 parts of ammonium persulfate, 3 parts of o-phenylphenol and 4.5 parts of hydroxypropyl methacrylate, uniformly mixing, heating to 85 ℃, preserving heat for 1 hour, cooling to 35 ℃, and cooling to room temperature to obtain the cement aid C.
The cement additive A is prepared according to the following process: adding 25 parts of talcum powder into 100 parts of water according to parts by weight, stirring and heating to 70 ℃ at the rotating speed of 150r/min, preserving heat for 30min, dropwise adding 40 parts of citric acid solution for 50min, stirring and reacting for 4h at the rotating speed of 300r/min, wherein the mass fraction of citric acid in the citric acid solution is 13 wt%, filtering and drying to obtain the cement additive A.
The cement additive B is prepared according to the following process: adding 13 parts by weight of nano silicon dioxide into 35 parts by weight of toluene, performing ultrasonic dispersion for 55min, adding 4 parts by weight of silane coupling agent, performing ultrasonic treatment for 13min, heating to 83 ℃, performing heat preservation and stirring for 9h, cooling, centrifuging and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 30 parts of toluene, heating to 72 ℃, and introducing N2And (2) dropwise adding 14 parts of ammonium persulfate aqueous solution for 55min, then adding 70 parts of styrene, adjusting the temperature to 73 ℃, keeping the temperature and stirring for 13h, performing suction filtration and drying, extracting for 11h by using methanol at the temperature of 70 ℃, extracting for 40h by using acetone, and drying to obtain the cement additive B.
The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste, which comprises the following steps: uniformly mixing coarse aggregates, fine aggregates and fly ash, drying at 130 ℃ for 6h, then crushing into particles of 35 meshes, then adding a cement aid A, a cement aid B, a cement aid C and water, uniformly mixing, heating to 140 ℃, keeping the temperature for 30min, stirring at the rotating speed of 2000r/min for 30min, and cooling to room temperature to obtain the cement stabilizing layer material prepared by utilizing the construction waste.
Example 2
A cement stabilizing layer material prepared from construction waste comprises the following raw materials in parts by weight: 60 parts of coarse aggregate, 70 parts of fine aggregate, 10 parts of fly ash, 8 parts of cement, 6 parts of cement additive A, 12 parts of cement additive B, 1 parts of cement additive C and 3 parts of water.
The coarse aggregate is a construction waste crushed aggregate obtained by processing a two-stage impact type or hammer type crusher, the crushing value of the construction waste crushed aggregate is less than or equal to 26 percent, the needle flake content is less than or equal to 15 percent, the dust content below 0.075mm is less than or equal to 1.2 percent, and the soft stone content is less than or equal to 3 percent; the fine aggregate is natural sand.
The gradation range of the mixture formed by mixing the coarse aggregate and the fine aggregate is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
The cement additive C is prepared by the following process: uniformly mixing 4 parts of rice bran wax, 5 parts of palm wax, 3 parts of corn starch and 15 parts of deionized water according to parts by weight, then adding 2 parts of a 5% sodium hydroxide solution and 4 parts of 5% epoxy chloropropane by weight, uniformly mixing, heating to 80 ℃, preserving heat for 3 hours, then adding 2 parts of sodium dodecyl benzene sulfonate and 6 parts of triethanolamine, uniformly mixing, heating to 90 ℃, preserving heat for 3 hours, then cooling to 60 ℃, then adding 4 parts of potassium persulfate, 3 parts of ammonium persulfate, 5 parts of o-phenylphenol and 3 parts of hydroxypropyl methacrylate, uniformly mixing, heating to 90 ℃, preserving heat for 0.5 hours, cooling to 40 ℃, and cooling to room temperature to obtain the cement additive C.
The cement additive A is prepared according to the following process: adding 20 parts by weight of talcum powder into 100 parts by weight of water, stirring and heating to 65 ℃ at the rotating speed of 250r/min, preserving heat for 40min, dropwise adding 30 parts by weight of citric acid solution for 60min, stirring and reacting for 3h at the rotating speed of 350r/min, and filtering and drying to obtain the cement additive A, wherein the mass fraction of citric acid in the citric acid solution is 10 wt%.
The cement additive B is prepared according to the following process: adding 10 parts by weight of nano silicon dioxide into 40 parts by weight of toluene, performing ultrasonic dispersion for 50min, adding 5 parts by weight of silane coupling agent, performing ultrasonic treatment for 10min, heating to 85 ℃, performing heat preservation and stirring for 8h, cooling, centrifuging and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 40 parts of toluene, heating to 70 ℃, and introducing N2And dropwise adding 18 parts of ammonium persulfate aqueous solution for 50min, then adding 80 parts of styrene, adjusting the temperature to 70 ℃, keeping the temperature and stirring for 15h, performing suction filtration and drying, extracting for 12h by using methanol at 68 ℃, extracting for 35h by using acetone, and drying to obtain the cement additive B.
The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste, which comprises the following steps: uniformly mixing coarse aggregates, fine aggregates and fly ash, drying at 120 ℃ for 8h, then crushing into 30-mesh particles, then adding a cement aid A, a cement aid B, a cement aid C and water, uniformly mixing, heating to 160 ℃, keeping the temperature for 20min, stirring at the rotating speed of 2500r/min for 20min, and cooling to room temperature to obtain the cement stabilizing layer material prepared by utilizing the construction waste.
Example 3
A cement stabilizing layer material prepared from construction waste comprises the following raw materials in parts by weight: 70 parts of coarse aggregate, 50 parts of fine aggregate, 20 parts of fly ash, 4 parts of cement, 10 parts of cement additive A, 8 parts of cement additive B, 3 parts of cement additive C and 1 part of water.
The coarse aggregate is a construction waste crushed aggregate obtained by processing a two-stage impact type or hammer type crusher, the crushing value of the construction waste crushed aggregate is less than or equal to 26 percent, the needle flake content is less than or equal to 15 percent, the dust content below 0.075mm is less than or equal to 1.2 percent, and the soft stone content is less than or equal to 3 percent; the fine aggregate is natural sand.
The gradation range of the mixture formed by mixing the coarse aggregate and the fine aggregate is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
The cement additive C is prepared by the following process: uniformly mixing 8 parts of rice bran wax, 2 parts of palm wax, 6 parts of corn starch and 5 parts of deionized water according to parts by weight, then adding 5 parts of 3% sodium hydroxide solution by mass and 8 parts of 3% epoxy chloropropane by mass, uniformly mixing, heating to 100 ℃, preserving heat for 1 hour, then adding 4 parts of sodium dodecyl benzene sulfonate and 3 parts of triethanolamine, uniformly mixing, heating to 110 ℃, preserving heat for 1 hour, then cooling to 70 ℃, then adding 1 part of potassium persulfate, 6 parts of ammonium persulfate, 1 part of o-phenylphenol and 6 parts of hydroxypropyl methacrylate, uniformly mixing, heating to 80 ℃, preserving heat for 1.5 hours, cooling to 30 ℃, and cooling to room temperature to obtain the cement additive C.
The cement additive A is prepared according to the following process: adding 30 parts of talcum powder into 100 parts of water according to parts by weight, stirring and heating to 75 ℃ at the rotating speed of 100r/min, preserving heat for 20min, dropwise adding 50 parts of citric acid solution for 40min, stirring and reacting for 5h at the rotating speed of 200r/min, wherein the mass fraction of citric acid in the citric acid solution is 15 wt%, and filtering and drying to obtain the cement additive A.
The cement additive B is prepared according to the following process: adding 15 parts by weight of nano silicon dioxide into 26 parts by weight of toluene, performing ultrasonic dispersion for 60min, adding 3 parts by weight of silane coupling agent, performing ultrasonic treatment for 15min, heating to 80 ℃, performing heat preservation and stirring for 10h, cooling, and performingCentrifuging and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 25 parts of toluene, heating to 75 ℃, and introducing N2And dropwise adding 10 parts of ammonium persulfate aqueous solution for 60min, then adding 60 parts of styrene, adjusting the temperature to 75 ℃, keeping the temperature and stirring for 10h, performing suction filtration and drying, extracting for 10h by using methanol at 75 ℃, extracting for 45h by using acetone, and drying to obtain the cement additive B.
The invention also provides a preparation method of the cement stabilizing layer material prepared by utilizing the construction waste, which comprises the following steps: uniformly mixing the coarse aggregate, the fine aggregate and the fly ash, drying at 140 ℃ for 4h, then crushing into 40-mesh particles, then adding the cement aid A, the cement aid B, the cement aid C and water, uniformly mixing, heating to 120 ℃, keeping the temperature for 40min, stirring at the rotating speed of 1500r/min for 40min, and cooling to room temperature to obtain the cement stabilizing layer material prepared by utilizing the construction waste.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (8)
1. A cement stabilizing layer material prepared by utilizing construction waste is characterized by comprising the following raw materials in parts by weight: 60-70 parts of coarse aggregate, 50-70 parts of fine aggregate, 10-20 parts of fly ash, 4-8 parts of cement, 6-10 parts of cement additive A, 8-12 parts of cement additive B, 1-3 parts of cement additive C and 1-3 parts of water.
2. The cement stabilizing layer material prepared by utilizing the construction waste as claimed in claim 1, wherein the cement additive C comprises the following raw materials in parts by weight: 4-8 parts of rice bran wax, 2-5 parts of palm wax, 3-6 parts of corn starch, 5-15 parts of deionized water, 2-5 parts of 3-5% sodium hydroxide solution, 4-8 parts of 3-5% epoxy chloropropane, 2-4 parts of sodium dodecyl benzene sulfonate, 3-6 parts of triethanolamine, 1-4 parts of potassium persulfate, 3-6 parts of ammonium persulfate, 1-5 parts of o-phenylphenol and 3-6 parts of hydroxypropyl methacrylate.
3. The cement stabilizing layer material prepared by using the construction waste as claimed in claim 2, wherein the cement additive C is prepared by the following process: uniformly mixing rice bran wax, palm wax, corn starch and deionized water, adding 3-5 mass percent of sodium hydroxide solution and 3-5 mass percent of epoxy chloropropane, uniformly mixing, heating to 80-100 ℃, preserving heat for 1-3h, then adding sodium dodecyl benzene sulfonate and triethanolamine, uniformly mixing, heating to 90-110 ℃, preserving heat for 1-3h, then cooling to 60-70 ℃, then adding potassium persulfate, ammonium persulfate, o-phenylphenol and hydroxypropyl methacrylate, uniformly mixing, heating to 80-90 ℃, preserving heat for 0.5-1.5h, cooling to 30-40 ℃, and cooling to room temperature to obtain the cement additive C.
4. The cement stabilizing layer material prepared by using the construction waste as set forth in claim 1, wherein the cement aid a is prepared according to the following process: adding 20-30 parts of talcum powder into 100 parts of water according to parts by weight, stirring and heating to 65-75 ℃ at the rotating speed of 100 plus materials at 250r/min, preserving heat for 20-40min, dropwise adding 30-50 parts of citric acid solution for 40-60min, stirring and reacting at the rotating speed of 200 plus materials at 350r/min for 3-5h, filtering and drying to obtain the cement additive A.
5. The cement stabilizing layer material prepared by using the construction waste as claimed in claim 4, wherein the cement additive B is prepared by the following process: adding 10-15 parts of nano silicon dioxide into 26-40 parts of toluene according to parts by weight, performing ultrasonic dispersion for 50-60min, adding 3-5 parts of silane coupling agent, performing ultrasonic treatment for 10-15min, heating to 80-85 ℃, performing heat preservation and stirring for 8-10h, cooling, centrifuging, and drying to obtain intermediate nano silicon dioxide; adding the intermediate nano silicon dioxide into 25-40 parts of toluene, heating to 70-75 ℃, and introducing N2Dripping 10-18 parts of ammonium persulfate aqueous solution for 50-60min, then adding 60-80 parts of styrene,adjusting the temperature to 70-75 ℃, keeping the temperature and stirring for 10-15h, performing suction filtration and drying, extracting for 10-12h by using methanol at 68-75 ℃, extracting for 35-45h by using acetone, and drying to obtain the cement additive B.
6. The cement stabilizing layer material prepared from the construction wastes according to claim 1, wherein the coarse aggregates are construction waste crushed aggregates processed by a two-stage impact crusher or hammer crusher, the crushing value of the construction waste crushed aggregates is less than or equal to 26%, the needle flake content is less than or equal to 15%, the dust content below 0.075mm is less than or equal to 1.2%, and the soft stone content is less than or equal to 3%; the fine aggregate is natural sand.
7. The cement stabilizing layer material prepared by utilizing the construction wastes according to the claim 6, wherein the gradation range of the mixture formed by mixing the coarse aggregates and the fine aggregates is as follows: 100 wt% through a 31.5mm square mesh sieve, 95-100 wt% through a 26.5mm square mesh sieve, 75-85 wt% through a 19.0mm square mesh sieve, 66-77 wt% through a 16.0mm square mesh sieve, 46-58 wt% through a 9.5mm square mesh sieve, 28-38 wt% through a 4.75mm square mesh sieve, 20-28 wt% through a 2.36mm square mesh sieve, 11-19 wt% through a 1.18mm square mesh sieve, 8-15 wt% through a 0.6mm square mesh sieve, 5-11 wt% through a 0.3mm square mesh sieve, 3-8 wt% through a 0.15mm square mesh sieve, and 0-5 wt% through a 0.075mm square mesh sieve.
8. A method for preparing a cement stabilizing layer material prepared by using construction waste according to any one of claims 1 to 7, which is characterized by comprising the following steps: the coarse aggregate, the fine aggregate and the fly ash are uniformly mixed, dried for 4-8h at the temperature of 120-plus 140 ℃, then crushed into particles of 30-40 meshes, then the cement additive A, the cement additive B, the cement additive C and water are added and uniformly mixed, the temperature is raised to 160 ℃ plus 120 plus, the temperature is kept for 20-40min, the mixture is stirred for 20-40min at the rotating speed of 2500r/min plus 1500 plus, and the mixture is cooled to room temperature to obtain the cement stable layer material prepared by utilizing the construction waste.
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