CN112479649A - Granite waste residue powder and silica fume synergistic modified recycled aggregate concrete and preparation method thereof - Google Patents
Granite waste residue powder and silica fume synergistic modified recycled aggregate concrete and preparation method thereof Download PDFInfo
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- CN112479649A CN112479649A CN202011297157.7A CN202011297157A CN112479649A CN 112479649 A CN112479649 A CN 112479649A CN 202011297157 A CN202011297157 A CN 202011297157A CN 112479649 A CN112479649 A CN 112479649A
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a modified recycled aggregate concrete with granite waste residue powder and silica fume and a preparation method thereof. The modified recycled aggregate concrete with the cooperation of granite waste residue powder and silica fume is prepared from the following raw materials in parts by weight: 26-38 parts of granite waste residue powder, 7-13 parts of silica fume, 167-195 parts of cement, 474-595 parts of recycled concrete coarse aggregate, 291-375 parts of fine aggregate, 78-102 parts of water and 1.89-2.13 parts of water reducing agent, wherein the water-cement ratio is 0.37-0.45. The invention utilizes industrial and building solid waste as all components, has high utilization rate, is green and environment-friendly, and saves resources. Compared with the traditional recycled aggregate concrete, the strength of the prepared modified recycled aggregate concrete is obviously improved, the performances such as durability, workability and the like are improved, and in addition, partial performances of the prepared modified recycled aggregate concrete are higher than those of the common concrete.
Description
Technical Field
The invention relates to the technical field of building engineering materials, in particular to modified recycled aggregate concrete with granite waste residue powder and silica fume and a preparation method thereof.
Background
At present, the annual production total amount of granite ore resources in China is at the top of the world, a large amount of granite waste materials and waste slag powder can be generated in the mining and processing of granite ores, wherein the granite waste materials still have certain bulk density due to not being raw materials, and can be processed into mosaic materials, small stone materials and the like, but the granite waste slag powder is not high in direct utilization degree, most of the granite waste slag powder is randomly stacked or buried, only a few of the granite waste slag powder is used as silicate raw materials or concrete admixtures and the like, part of purification processes are complex, mass production cannot be achieved, and the resource regeneration utilization rate is low.
With the development of urban construction in China, the yield of cement increases day by day, about 1.3t limestone ore is consumed for producing 1t cement on average, the national cumulative cement yield is increased by 6.1 percent in 2019 according to data of national statistical bureau, and the emission of CO _2 generated in the cement production process reaches more than 10 hundred million t. The limestone total resource in China is in shortage at present, and the carbon emission needs to be strictly controlled. The development of materials capable of replacing cement is one of effective solutions for relieving resource shortage and controlling carbon emission.
Meanwhile, under urban construction, a large amount of construction waste is generated, and the components of the construction waste are also complex. In addition, the demand of the building industry for gravels is high, but the total amount of natural resources is continuously reduced, the intensification degree of the mining industry is low, the deep processing capacity is insufficient, and the waste is serious. At present, the construction waste utilization technology mainly comprises the step of crushing waste concrete into recycled aggregate serving as a raw material of the concrete, but compared with natural aggregate, mortar is adhered to the surface of the recycled aggregate, and the defects of more edges and corners of particles, rough surface, high porosity, high water absorption and the like are caused. The prior art is mostly physical strengthening and chemical strengthening. The physical strengthening technology is secondary particle shaping, the treated concrete can reach the national I-type aggregate standard, but a large number of cracks with certain sizes are generated inside the crushing process, and the prepared concrete has a weak interface transition area, is easy to damage and greatly reduces the strength. The chemical strengthening technology adopts acid liquor or cement paste and the like to carry out dipping and spraying treatment on the recycled aggregate, can improve the strength of the recycled concrete to a certain extent, but has insignificant improvement effect and less practical application.
In the conventional solid waste recycling technology, the inherent property of resources is considered, and meanwhile, the solid waste is effectively recycled, and common regenerated products are granite stone powder admixture, recycled aggregate concrete and the like, for example, in the prior patent No. 201610783058.7, the modified granite stone powder admixture and the preparation method thereof modify granite stone powder by using an inorganic modifier and a grinding aid, so that the activity is improved and the modified granite stone powder admixture is more suitable for being used as an admixture of cement; according to the existing technology for activating and regenerating cement by waste concrete with patent number 200510136624.7, the waste concrete is crushed and sorted, and then regenerated cement is prepared by heat treatment, machinery, chemical activation by adding auxiliary materials and other technologies, various parameters are strictly controlled in the preparation process, and the process flow is complex. And the reinforced recycled aggregate of the waste concrete of the construction waste with the prior patent number of 201620455206.8, the aggregate is treated by using a water glass solution and a polyvinyl alcohol solution, a strengthening layer, a bonding layer and a cement shell are formed on the surface of the aggregate, the compressive strength of the prepared concrete is averagely improved by 28-35 percent, but the cost is higher.
The inquiry results show that at present, the solid waste is mostly recycled, the problems of abandonment and resource waste of part of granite waste slag powder and waste concrete can be solved, but the process means is dispersed, systematization is insufficient, and the process is more complicated, and secondary resource waste and environmental pollution are inevitably caused in the utilization process. Aiming at the problems, the modified recycled aggregate concrete prepared by combining the granite waste residue powder and the silica fume and the preparation method thereof are provided, and a method is provided for comprehensive utilization of various inorganic solid wastes and exerting the synergistic effect of each component.
Disclosure of Invention
The invention aims to provide a modified recycled aggregate concrete with granite waste residue powder and silica fume and a preparation method thereof, which solve at least part of problems in the background technology.
In order to achieve the purpose, according to one aspect of the invention, the modified recycled aggregate concrete with the granite waste residue powder and the silica fume is prepared from 26-38 parts by weight, 7-13 parts by weight, 167-195 parts by weight, 474-595 parts by weight, 291-375 parts by weight, 78-102 parts by weight and 1.89-2.13 parts by weight of granite waste residue powder, cement, recycled coarse aggregate, sand, water and a water reducing agent according to a corresponding proportion, wherein the water-cement ratio is 0.37-0.45.
According to one embodiment of the invention, the granite waste residue powder comprises granite abrasive material and polishing powder.
According to one embodiment of the invention, wherein the cement is P.052.5 Portland cement with a specific surface area of 300m or more2The screen residue of a square-hole screen with the size of 80 mu m is not more than 10 percent and the ignition loss is not more than 5 percent.
According to one embodiment of the present invention, wherein the SiO of the silica fume2The content is more than or equal to 92 percent, the particle size is 0.1-0.2 mu m, and the specific surface area is 24-28 m2/g。
According to an embodiment of the invention, the water reducing agent is a polycarboxylic acid liquid water reducing agent, the pH value is 6-8, and the density is 1.07-1.11 g/ml.
According to one embodiment of the invention, the fine aggregate is river sand, the particle size distribution is 1.18-4.75 mm, the continuous size fraction is realized, and the grading is good.
According to one embodiment of the invention, the recycled coarse aggregate is obtained by crushing and sorting waste concrete, the particle size distribution is 4.75-31.5 mm, the continuous particle size is obtained, and the grading is good.
According to another aspect of the present invention, there is provided a method for preparing the modified recycled aggregate concrete, comprising:
(a) pretreatment of granite waste slag powder: placing the granite waste residue powder into a stirring tank, stirring, washing with water, and removing sand to obtain granite waste residue powder with particle size of below 100 μm;
(b) weighing the raw materials: weighing the following raw materials, 26-38 parts of granite waste residue powder, 7-13 parts of silica fume, 167-195 parts of cement, 474-595 parts of recycled coarse aggregate, 291-375 parts of fine aggregate, 78-102 parts of water and 1.89-2.13 parts of a water reducing agent;
(c) stirring: mixing the weighed granite waste residue powder and silica fume, pouring the mixture and the recycled coarse aggregate into a stirrer, uniformly stirring, pouring cement and fine aggregate into the stirrer for dry stirring, finally adding a mixed solution of a water reducing agent and water, and stirring to obtain the uniformly mixed modified recycled aggregate concrete.
Compared with the prior art, the invention has the beneficial effects that:
(1) the waste residue powder of granite contains more than 70% of SiO2And Al2O3CaO, etc., SiO of silica fume2The content is more than or equal to 92 percent, the granite waste residue powder can be mixed with silica fume in equal amount to replace cement after treatment, so that reasonable utilization of granite processing waste is realized while cement is saved and carbon emission is reduced;
(2) the recycled coarse aggregate, the granite waste residue powder and the silica fume mixture are stirred together, so that the micro cracks and surface pores of the recycled coarse aggregate can be effectively filled, and the performances of the recycled aggregate, such as strength, water absorption, crushing index and the like, are improved, so that the performances of the prepared concrete, such as compressive strength, durability and the like, are improved;
(3) considering the synergistic comprehensive utilization of two solid wastes of granite waste slag powder and waste concrete, after the granite waste slag powder and silica fume are synergistic, the performance of the recycled aggregate is improved while replacing part of cement, and the synergistic effect of each component is exerted through a simple treatment process;
(4) compared with the traditional recycled aggregate concrete, the strength of the prepared modified recycled aggregate concrete is obviously improved, and the performances such as durability, workability and the like of the modified recycled aggregate concrete are improved;
(5) the simple process can solve the problems of the abandonment of part of granite waste slag powder and waste concrete and the resource waste, and reduce the environmental pollution.
Drawings
FIG. 1 is a flow chart of the preparation of a modified recycled aggregate concrete of granite waste residue powder in cooperation with silica fume according to one embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
Example 1
A modified recycled aggregate concrete with granite waste residue powder and silica fume is composed of the following raw materials in parts by weight: 30 parts of granite waste residue powder, 10 parts of silica fume, 180 parts of cement, 530 parts of recycled coarse aggregate, 340 parts of sand, 100 parts of water and 2.10 parts of water reducing agent, wherein the water-cement ratio is 0.45.
The cement is P.052.5 ordinary Portland cement with a specific surface area of 320m2Per kg, the residue on a 80 mu m square-hole sieve is 7 percent, and the loss on ignition is 3.5 percent.
SiO of the silica fume293 percent of the total weight, the grain diameter of 0.1 to 0.2 mu m, and the specific surface area of 26m2/g。
The water reducing agent is a polycarboxylic acid liquid water reducing agent, the PH value is 7, and the density is 1.10 g/ml.
The fine aggregate is river sand, the particle size distribution is 1.18-4.35 mm, the continuous particle size is achieved, and the gradation is good.
The modified recycled aggregate concrete with the granite waste residue powder and the silica fume comprises the following steps:
(a) pretreatment of granite waste slag powder: placing the granite waste residue powder into a stirring tank, stirring, washing with water, and removing sand to obtain granite waste residue powder with particle size of below 100 μm;
(b) weighing the raw materials: weighing raw materials of granite waste residue powder, silica fume, cement, recycled coarse aggregate, fine aggregate, water and a water reducing agent according to parts by weight;
(c) stirring: mixing the weighed granite waste residue powder and silica fume, pouring the mixture and the recycled coarse aggregate into a stirrer, stirring for 50-60s, pouring cement and fine aggregate into the stirrer, dry-stirring for 50-60s, finally adding a mixed solution of a water reducing agent and water, and stirring for 100-120s to obtain the uniformly mixed modified recycled aggregate concrete.
(d) Molding: and (c) pouring the mixture obtained in the step (c) into a mould for vibration pressing and forming, demoulding to obtain formed concrete, performing steam curing in a steam curing room at the temperature of 50-70 ℃ for 10-24 hours, and performing curing in a natural curing room, wherein the standard curing period is 7 days and 28 days, so as to obtain the recycled aggregate concrete.
After the curing age is reached, according to the specified method of GB50164 concrete quality control Standard, a test block is taken out for a compression test, and the 28d compression strength and the 7d compression strength of the modified recycled aggregate concrete of the granite waste residue powder and the silica fume are 45.6MPa and 33.8MPa respectively.
Example 2
A modified recycled aggregate concrete with granite waste residue powder and silica fume is composed of the following raw materials in parts by weight: 35 parts of granite waste residue powder, 12 parts of silica fume, 185 parts of cement, 550 parts of recycled coarse aggregate, 330 parts of sand, 100 parts of water and 2.13 parts of water reducing agent, wherein the water-cement ratio is 0.43.
The cement is P.052.5 ordinary Portland cement with a specific surface area of 320m2Per kg, the residue on a 80 mu m square-hole sieve is 7 percent, and the loss on ignition is 3.5 percent.
SiO of the silica fume293 percent of the total weight, the grain diameter of 0.1 to 0.2 mu m, and the specific surface area of 26m2/g。
The water reducing agent is a polycarboxylic acid liquid water reducing agent, the PH value is 7, and the density is 1.10 g/ml.
The fine aggregate is river sand, the particle size distribution is 1.18-4.35 mm, the continuous particle size is achieved, and the gradation is good.
The modified recycled aggregate concrete with the granite waste residue powder and the silica fume comprises the following steps:
(a) pretreatment of granite waste slag powder: placing the granite waste residue powder into a stirring tank, stirring, washing with water, and removing sand to obtain granite waste residue powder with particle size of below 100 μm;
(b) weighing the raw materials: weighing raw materials of granite waste residue powder, silica fume, cement, recycled coarse aggregate, fine aggregate, water and a water reducing agent according to parts by weight;
(c) stirring: mixing the weighed granite waste residue powder and silica fume, pouring the mixture and the recycled coarse aggregate into a stirrer, stirring for 50-60s, pouring cement and fine aggregate into the stirrer, dry-stirring for 50-60s, finally adding a mixed solution of a water reducing agent and water, and stirring for 100-120s to obtain the uniformly mixed modified recycled aggregate concrete.
(d) Molding: and (d) pouring the mixture obtained in the step (d) into a mould for vibration pressing and forming, demoulding to obtain formed concrete, performing steam curing in a steam curing room at the temperature of 50-70 ℃ for 10-24 hours, and performing curing in a natural curing room, wherein the standard curing period is 7 days and 28 days, so as to obtain the recycled aggregate concrete.
After the curing age is reached, according to the specified method of GB50164 concrete quality control Standard, a test block is taken out for a compression test, and the 28d compression strength and the 7d compression strength of the modified recycled aggregate concrete of the granite waste residue powder and the silica fume are 47.2MPa and 35.2MPa respectively.
Example 3
A modified recycled aggregate concrete with granite waste residue powder and silica fume is composed of the following raw materials in parts by weight: 26 parts of granite waste residue powder, 8 parts of silica fume, 190 parts of cement, 500 parts of recycled coarse aggregate, 320 parts of sand, 85 parts of water and 1.95 parts of water reducing agent, wherein the water-cement ratio is 0.38.
The cement is P.052.5 ordinary Portland cement with a specific surface area of 320m2Per kg, the residue on a 80 mu m square-hole sieve is 7 percent, and the loss on ignition is 3.5 percent.
SiO of the silica fume293 percent of the total weight, the grain diameter of 0.1 to 0.2 mu m, and the specific surface area of 26m2/g。
The water reducing agent is a polycarboxylic acid liquid water reducing agent, the PH value is 7, and the density is 1.10 g/ml.
The fine aggregate is river sand, the particle size distribution is 1.18-4.35 mm, the continuous particle size is achieved, and the gradation is good.
The modified recycled aggregate concrete with the granite waste residue powder and the silica fume comprises the following steps:
(a) pretreatment of granite waste slag powder: placing the granite waste residue powder into a stirring tank, stirring, washing with water, and removing sand to obtain granite waste residue powder with particle size of below 100 μm;
(b) weighing the raw materials: weighing raw materials of granite waste residue powder, silica fume, cement, recycled coarse aggregate, fine aggregate, water and a water reducing agent according to parts by weight;
(c) stirring: mixing the weighed granite waste residue powder and silica fume, pouring the mixture and the recycled coarse aggregate into a stirrer, stirring for 50-60s, pouring cement and fine aggregate into the stirrer, dry-stirring for 50-60s, finally adding a mixed solution of a water reducing agent and water, and stirring for 100-120s to obtain the uniformly mixed modified recycled aggregate concrete.
(d) Molding: and (d) pouring the mixture obtained in the step (d) into a mould for vibration pressing and forming, demoulding to obtain formed concrete, performing steam curing in a steam curing room at the temperature of 50-70 ℃ for 10-24 hours, and performing curing in a natural curing room, wherein the standard curing period is 7 days and 28 days, so as to obtain the recycled aggregate concrete.
After the curing age is reached, according to the specified method of GB50164 concrete quality control Standard, a test block is taken out for a compression test, and the 28d compression strength and the 7d compression strength of the modified recycled aggregate concrete of the granite waste residue powder and the silica fume are 51.3MPa and 41.5MPa respectively.
The above embodiments are only for illustrating the preferred embodiments of the present application, and do not limit the scope of the present application, and those skilled in the art should make general changes and substitutions within the scope of the present application.
Claims (8)
1. A modified recycled aggregate concrete of granite waste residue powder and silica fume is characterized in that: the concrete comprises 26-38 parts by weight of granite waste residue powder, 7-13 parts by weight of silica fume, 167-195 parts by weight of cement, 474-595 parts by weight of sand, 291-375 parts by weight of water, 78-102 parts by weight of cement and 1.89-2.13 parts by weight of water-cement ratio of 0.37-0.45.
2. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: the granite waste slag powder comprises granite abrasive material and polishing powder.
3. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: the cement is P.052.5 ordinary Portland cement, and the specific surface area is more than or equal to 300m2The screen residue of a square-hole screen with the size of 80 mu m is not more than 10 percent and the ignition loss is not more than 5 percent.
4. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: SiO of the silica fume2The content is more than or equal to 92 percent, the particle size is 0.1-0.2 mu m, and the specific surface area is 24-28 m2/g。
5. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: the water reducing agent is a polycarboxylic acid liquid water reducing agent, the PH value is 6-8, and the density is 1.07-1.11 g/ml.
6. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: the fine aggregate is river sand, the particle size distribution is 1.18-4.75 mm, the continuous particle size is achieved, and the gradation is good.
7. The modified recycled aggregate concrete of the granite waste residue powder and the silica fume, which is disclosed by claim 1, is characterized in that: the recycled coarse aggregate is obtained by crushing and sorting waste concrete, the particle size distribution is 4.75-31.5 mm, the continuous particle size is achieved, and the gradation is good.
8. A preparation method of a modified recycled aggregate concrete by using the granite waste residue powder and the silica fume as described in any one of claims 1 to 7, is characterized by comprising the following steps:
(a) pretreatment of granite waste slag powder: placing the granite waste residue powder into a stirring tank, stirring, washing with water, and removing sand to obtain granite waste residue powder with particle size of below 100 μm;
(b) weighing the raw materials: weighing the following raw materials, 26-38 parts of granite waste residue powder, 7-13 parts of silica fume, 167-195 parts of cement, 474-595 parts of recycled coarse aggregate, 291-375 parts of fine aggregate, 78-102 parts of water and 1.89-2.13 parts of a water reducing agent;
(c) stirring: mixing the weighed granite waste residue powder and silica fume, pouring the mixture and the recycled coarse aggregate into a stirrer, uniformly stirring, pouring cement and fine aggregate into the stirrer for dry stirring, finally adding a mixed solution of a water reducing agent and water, and stirring to obtain the uniformly mixed modified recycled aggregate concrete.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113248202A (en) * | 2021-05-17 | 2021-08-13 | 北华大学 | Cement-based recycled concrete |
| CN115124298A (en) * | 2022-04-18 | 2022-09-30 | 同济大学 | High-strength recycled aggregate concrete prepared from waste stone powder and preparation method thereof |
| CN116023097A (en) * | 2022-12-30 | 2023-04-28 | 西北核技术研究所 | Concrete for underground engineering construction by using granite tunneling hole slag as aggregate and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274648A (en) * | 2013-06-20 | 2013-09-04 | 福州大学 | Granite stone powder doped high-strength concrete tubular pile and production method thereof |
| CN105236841A (en) * | 2015-08-25 | 2016-01-13 | 合诚工程咨询股份有限公司 | Reactive powder concrete doped with granite powder and preparation method thereof |
| CN105819779A (en) * | 2016-03-23 | 2016-08-03 | 沈阳大学 | Grade-C60 high-strength recycled concrete and preparation method thereof |
-
2020
- 2020-11-18 CN CN202011297157.7A patent/CN112479649A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274648A (en) * | 2013-06-20 | 2013-09-04 | 福州大学 | Granite stone powder doped high-strength concrete tubular pile and production method thereof |
| CN105236841A (en) * | 2015-08-25 | 2016-01-13 | 合诚工程咨询股份有限公司 | Reactive powder concrete doped with granite powder and preparation method thereof |
| CN105819779A (en) * | 2016-03-23 | 2016-08-03 | 沈阳大学 | Grade-C60 high-strength recycled concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 林燕妮: "花岗岩石粉复合矿物掺合料对再生混凝土工作性和强度影响", 《福建建材》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113248202A (en) * | 2021-05-17 | 2021-08-13 | 北华大学 | Cement-based recycled concrete |
| CN115124298A (en) * | 2022-04-18 | 2022-09-30 | 同济大学 | High-strength recycled aggregate concrete prepared from waste stone powder and preparation method thereof |
| CN116023097A (en) * | 2022-12-30 | 2023-04-28 | 西北核技术研究所 | Concrete for underground engineering construction by using granite tunneling hole slag as aggregate and preparation method thereof |
| CN116023097B (en) * | 2022-12-30 | 2024-06-21 | 西北核技术研究所 | Concrete for underground engineering construction by using granite tunneling hole slag as aggregate and preparation method thereof |
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Application publication date: 20210312 |