CN114014595B - Sleeve grouting material containing white marble waste residue for connecting steel bars and preparation method thereof - Google Patents
Sleeve grouting material containing white marble waste residue for connecting steel bars and preparation method thereof Download PDFInfo
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- CN114014595B CN114014595B CN202111271430.3A CN202111271430A CN114014595B CN 114014595 B CN114014595 B CN 114014595B CN 202111271430 A CN202111271430 A CN 202111271430A CN 114014595 B CN114014595 B CN 114014595B
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- white marble
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a sleeve grouting material containing white marble waste residue for connecting steel bars and a preparation method thereof, wherein the sleeve grouting material mainly comprises the following components in parts by weight: 60-80 parts of cement, 10-20 parts of active mineral admixture, 20-100 parts of white marble waste residue, 5-15 parts of MgO, 0.01-0.04 part of plastic expanding agent, 0.5-4.0 parts of water reducing agent and 0.05-0.3 part of defoaming agent. According to the invention, the white marble solid waste is adopted to completely replace natural sand and quartz sand, and the component proportion is designed and optimized, so that the prepared sleeve grouting material has the characteristics of no bleeding, good fluidity, standard early strength and vertical expansion rate, high strength, micro-expansion of later volume and the like, the cost of the grouting material is reduced, the reutilization of solid waste resources is realized, the waste is changed into valuable, the pollution of the white marble waste residue to the environment is reduced, and the defects of the prior art are overcome.
Description
Technical Field
The invention relates to the technical field of concrete grouting material preparation, in particular to a sleeve grouting material containing white marble waste residue for connecting steel bars and a preparation method thereof.
Background
The sleeve grouting material for connecting the steel bars is a cement-based grouting material compounded by cement, fine aggregate and various additives, has the characteristics of low viscosity, good fluidity, high strength, micro-expansion and no shrinkage and the like, and has the performance indexes shown in table 1:
TABLE 1 Performance index of Normal temperature Sleeve grouting Material
The sleeve grouting material for connecting the steel bars is generally used for connecting prefabricated concrete members such as prefabricated frame columns and shear walls of prefabricated houses, industrialized houses and the like with foundations, secondarily grouting large equipment foundations, bolt grouting high-rise steel structure column bases and the like.
The fine aggregate for preparing the grouting material is generally natural sand or quartz sand, and the natural sand and the quartz sand are nonrenewable natural resources in a short period of time, the supply amount is in shortage day by day and the price is high, with the rising of the cost of building materials, according to market research, the market price of the quartz sand is 800-1000 yuan/ton, the market price of river sand is 120-150 yuan/ton, and the market price of mountain sand is 120-150 yuan/ton, the cost of the grouting material is high due to the adoption of the natural sand or the quartz sand, the profit of enterprises is gradually reduced, the search for cheap substitutes of the natural sand and the quartz sand is a method capable of effectively reducing the material cost, the existing research is mainly focused on the use of mineral waste materials to reduce the use of the natural sand and the quartz sand, however, the performance of the grouting material is unstable due to the introduction of the mineral waste materials, and only the substitution of partial natural sand and the quartz sand can be realized, and the cost reduction is not obvious, so how to reduce the material cost of the grouting material is a technical problem to be solved by technicians at present.
Chinese patent CN113213857A discloses a high-performance iron tailing sand sleeve grouting material for an assembly type building, which comprises cement, fine aggregate, mineral admixture, a water reducing agent and gypsum, wherein the fine aggregate comprises natural sand and iron tailing sand, so that the iron tailing sand replaces part of the natural sand, the material cost is reduced, and the solid waste utilization is realized. This patent, while using iron tailings to replace a portion of the natural sand, still does not get rid of the use of natural sand and also requires the use of more expensive gypsum material, which is not a preferred embodiment.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the invention provides the sleeve grouting material containing the white marble waste residue for connecting the steel bars and the preparation method thereof.
The technical scheme adopted by the invention is as follows: the sleeve grouting material containing white marble waste residue for connecting the steel bars is characterized by mainly comprising the following components in parts by weight: 60-80 parts of cement, 10-20 parts of active mineral admixture, 20-100 parts of white marble waste residue, 5-15 parts of MgO, 0.01-0.04 part of plastic expanding agent, 0.5-4.0 parts of water reducing agent and 0.05-0.3 part of defoaming agent.
According to the invention, the industrial waste white marble waste residue is used as a main raw material and completely replaces natural sand and quartz sand, the price of the white marble waste residue is about 50 yuan/ton and is far lower than the prices of the quartz sand, river sand and mountain sand, the material cost is greatly reduced, high added value utilization of the white marble waste residue is realized, a new way is provided for utilization of the white marble waste residue, various performances of the prepared sleeve grouting material reach standard requirements by designing and optimizing the component distribution ratio, and the sleeve grouting material has market competitiveness compared with similar products and is more economical for the traditional sleeve grouting material.
Specifically, when the white marble waste residues are used as the main raw material, the calcium sulphoaluminate expanding agent, the calcium oxide expanding agent and the calcium sulphoaluminate-calcium oxide expanding agent have a rapid hydration reaction in the hydration system, so that the sleeve grouting material is prematurely coagulated and hardened, the loss of the fluidity of the grouting material is rapid, and the fluidity of the grouting material is not up to the standard. Meanwhile, the Han Bai Yuzha selected by the invention is mainly prepared from waste residues formed in the process of Han white jade mining and processing, and is obtained by drying and screening, and is not subjected to special treatment of crushing granulation and shape modification like artificial sand and quartz sand. Therefore, compared with natural sand and quartz sand, the white marble waste residue has more needle-shaped particles, the mechanical engagement effect among the particles in the prepared sleeve grouting material is large, the internal friction resistance is enhanced, and the slurry fluidity is reduced. When the calcium sulphoaluminate expanding agent, the calcium oxide expanding agent, the calcium sulphoaluminate-calcium oxide expanding agent and the white marble waste residue are matched for use, the superposition of the negative effect on the fluidity of the sleeve grouting material can cause the fluidity of the sleeve grouting material to be reduced and the fluidity loss to be rapidly increased, and the requirements of regulation and use cannot be met. In addition, the conventional expansion agents such as the calcium sulphoaluminate expansion agent, the calcium oxide expansion agent and the calcium sulphoaluminate-calcium oxide expansion agent have large early expansion amount and small later expansion amount, so that the later expansion and deformation of the sleeve grouting material are small in contribution, the large early expansion amount is easily offset by the plastic deformation of the sleeve grouting material, the deformation contribution to the plastic stage of the grouting material is very limited, and the calcium sulphoaluminate expansion agent, the calcium oxide expansion agent, the calcium sulphoaluminate-calcium oxide expansion agent and the plastic expansion agent have poor coordination and compatibility, so that the early vertical expansion rate of the sleeve grouting material cannot reach the standard.
In order to overcome the above-mentioned disadvantagesThe defects of the conventional expanding agent are obtained through experimental research, and the MgO powder is used as an expanding component, so that the adverse effects of large fluidity loss of the sleeve grouting material, weakening of the effect of the plastic expanding agent and reduction of the strength of the sleeve grouting material caused by the conventional calcium sulphoaluminate expanding agent and calcium oxide expanding agent can be avoided. The MgO powder is prepared by calcining magnesite or dolomite at 800-1300 deg.C, grinding to obtain powder, and hydrating to form Mg (OH) 2 The volume expansion is generated, the structure is compact, the hydration reaction is slow, the competition for water is relatively weak, the expansion delaying characteristic is realized, the expansion process is slow, the characteristic of a plastic expanding agent is just matched, and the negative effect superposition on the fluidity when the traditional expanding agent and the white marble waste residue are used simultaneously is avoided. Therefore, when the MgO powder is applied to the sleeve grouting material containing the white marble waste residues, the influence of the fluidity loss of the grouting material is small, the MgO powder has better coordination and compatibility with the plastic expanding agent, and the efficiency of the plastic expanding agent can be fully exerted. Meanwhile, the MgO powder has a large later expansion effect on the sleeve grouting material due to the self characteristics, and the strength development influence of the grouting material is small.
Further, the particle size of the white marble waste residue is 20-40 meshes.
Further, the active mineral admixture is one or more of fly ash, mineral powder and limestone powder.
Further, the water-to-glue ratio of the sleeve grouting material is 0.20-0.24, and the sand-to-glue ratio is 1.0-1.2.
Furthermore, the MgO is MgO powder, the sieve residue of the MgO powder with the fineness of 1.18mm is less than or equal to 0.5 percent, or the specific surface area of the MgO powder is more than or equal to 200m 2 /kg。
Further, the water reducing agent is powder and can be composed of one or more of a naphthalene water reducing agent, an aminosulfonic acid water reducing agent and a polycarboxylic acid water reducing agent.
Further, the defoaming agent is preferably a silicone defoaming agent; the plastic swelling agent is preferably a plastic swelling agent which has the grain diameter of 3-5 mu m and takes the Aloes soil mineral as the main material. The plastic expanding agent is yellow powder in appearance, is prepared by grinding aluminum rock soil minerals serving as main materials in a nitrogen atmosphere and in the presence of carbon and calcium oxide after sintering at a high temperature of about 1700 ℃, is mainly used for enabling the sleeve grouting material to generate volume micro-expansion in a plastic stage, and has the expansion principle that gas is slowly generated by reaction with water in an alkaline environment in the plastic stage of cement paste to enable the cement paste to generate plastic expansion.
The invention also comprises a preparation method of the sleeve grouting material containing white marble waste residue for connecting the steel bars, which comprises the following steps:
s1, drying the collected white marble waste residues, and crushing and screening to obtain white marble waste residue particles with the particle size of 20-40 meshes for later use;
s2, weighing other components according to the design amount, and then adding a certain amount of water to mix and stir the components uniformly to obtain the sleeve grouting material.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: according to the invention, the white marble solid waste is adopted to completely replace natural sand and quartz sand, and the component proportion is designed and optimized, so that the prepared sleeve grouting material has the characteristics of no bleeding, good fluidity, standard early strength and vertical expansion rate, high strength, micro-expansion of later volume and the like, the cost of the grouting material is reduced, the reutilization of solid waste resources is realized, the waste is changed into valuable, the pollution of the white marble waste residue to the environment is reduced, and the defects of the prior art are overcome.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The sleeve grouting material containing white marble waste residue for connecting the steel bars is characterized by mainly comprising the following components in parts by weight: 60-80 parts of cement, 10-20 parts of active mineral admixture, 20-100 parts of white marble waste residue, 5-15 parts of MgO, 0.01-0.04 part of plastic expanding agent, 0.5-4.0 parts of water reducing agent and 0.05-0.3 part of defoaming agent.
Wherein the particle size of the white marble waste residue is 20-40 meshes,the MgO is sieve residue with fineness of 1.18mm is less than or equal to 0.5 percent, or the specific surface area of the MgO powder is more than or equal to 200m 2 The plastic expanding agent is preferably a plastic expanding agent which takes the Aloes soil mineral as a main material, the water reducing agent is preferably powder which is composed of one or more of a naphthalene water reducing agent, an aminosulfonic acid water reducing agent and a polycarboxylic acid water reducing agent, and the defoaming agent is preferably an organic silicon defoaming agent.
The preparation method of the sleeve grouting material comprises the following steps:
s1, drying the collected white marble waste residues, and crushing and screening to obtain white marble waste residue particles with the particle size of 20-40 meshes for later use;
s2, weighing other components according to the design amount, and then adding a certain amount of water to mix and stir the components uniformly to obtain the sleeve grouting material.
In order to better illustrate and explain the innovative points of the present invention, the following examples are listed in table 1, and the test results are shown in table 2:
table 1 part of the mixing ratio parameters of the sleeve grouting material examples
In the table: s is a calcium sulphoaluminate expanding agent, C is a calcium oxide expanding agent, and SC is a calcium sulphoaluminate-calcium oxide expanding agent.
Table 2 examples 1-5 major properties of the sleeve grout
As can be seen from table 2, it is,
(1) The sleeve grouting material is obtained by comparing the examples 1 and 2, when no MgO powder is added, the strength value and the fluidity of the sleeve grouting material at each specified time meet the standard requirements, and the vertical expansion rate reaches the standard, but the 28d self-drying shrinkage is 0.22%, and the 28d self-drying shrinkage does not meet the specified requirement that the 28d self-drying shrinkage is less than or equal to 0.045%. When 5.0 percent of MgO is added, the strength, the fluidity and the vertical expansion rate of the sleeve grouting material fluctuate within a normal range, the difference is not large, but the volume expansion generated after the MgO is hydrated offsets the shrinkage generated by the self-drying action of the slurry, and the slurry is subjected to 28d self-drying to generate 0.018 percent volume micro-expansion, thereby meeting the standard requirement on 28d self-drying shrinkage.
(2) By comparing the embodiment 2 with the embodiments 3 to 5, when the swelling agents are the traditional swelling agents such as calcium sulphoaluminate swelling agent, calcium oxide swelling agent and calcium sulphoaluminate-calcium oxide swelling agent, the traditional swelling agents react quickly after meeting water, the setting and hardening of the sleeve grouting material are accelerated, although the strength of the sleeve grouting material 1d is improved, the loss of the fluidity of the grouting material is quicker, the fluidity of the sleeve grouting material is not up to the standard within 3h, the coordination compatibility with the plastic swelling agent is poor, and the vertical expansion rate of the sleeve grouting material is not up to the standard. Secondly, the conventional expanding agent needs a large amount of water for reaction, competes for water with the hydration reaction of cement and other cementing materials, influences the hydration of the cement and other cementing materials in the sleeve grouting material with lower water-cement ratio, and causes the reduction of the strength of the sleeve grouting materials 3d and 28d to different degrees. Finally, the conventional expanding agent reacts quickly with water, the early expansion amount is large, the expansion speed is high, but the expansion amount generated in the early stage is easily offset by the plastic deformation of the sleeve grouting material, the contribution to the expansion deformation in the plastic stage of the grouting material is very limited, and the expansion amount of the expanding agent after being released quickly in the early stage contributes little to the later-stage shrinkage deformation of the compensation sleeve grouting material, and compared with the embodiment 2, the 28d self-drying shrinkage of the embodiments 3-5 is increased in different degrees.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The sleeve grouting material containing white marble waste residue for connecting the steel bars is characterized by mainly comprising the following components in parts by weight: 60-80 parts of cement, 10-20 parts of active mineral admixture, 20-100 parts of white marble waste residue, 5-15 parts of MgO, 0.01-0.04 part of plastic expanding agent, 0.5-4.0 parts of water reducing agent and 0.05-0.3 part of defoaming agent; the active mineral admixture is one or more of fly ash, mineral powder and limestone powder; the defoaming agent is a silicone defoaming agent, and the plastic expanding agent is a plastic expanding agent with the grain diameter of 3-5 mu m and taking the aluminum rock soil mineral as a main material.
2. The sleeve grouting material for reinforcing steel bar connection containing white marble waste as claimed in claim 1, wherein the particle size of the white marble waste is 20-40 mesh.
3. The sleeve grouting material containing white marble waste residue for reinforcing steel bar connection of claim 1, wherein the water-to-glue ratio of the sleeve grouting material is 0.20-0.24, and the sand-to-glue ratio is 1.0-1.2.
4. The sleeve grouting material for reinforcing steel bar connection containing white marble residues as claimed in claim 1, wherein the MgO is MgO powder with a fineness of 1.18mm and a screen residue of 0.5% or less, or the specific surface area of the MgO powder is more than or equal to 200m 2 /kg。
5. The sleeve grouting material containing white marble waste residue for reinforcing steel bar connection of claim 1, wherein the water reducing agent is powder, and the water reducing agent is one or more of naphthalene water reducing agent, sulfamic acid water reducing agent and polycarboxylic acid water reducing agent.
6. The method for preparing the sleeve grouting material containing white marble waste residue for connecting the steel bars as claimed in any one of claims 1 to 5, comprising the following steps:
s1, drying the collected white marble waste residues, and crushing and screening to obtain white marble waste residue particles with the particle size of 20-40 meshes for later use;
s2, weighing other components according to the design amount, and then adding a certain amount of water to mix and stir the components uniformly to obtain the sleeve grouting material.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466986A (en) * | 2013-09-02 | 2013-12-25 | 苏州科技学院 | Composite expanding agent for cement-based non-shrinkage grouting material |
| CN104402345A (en) * | 2014-11-28 | 2015-03-11 | 中建商品混凝土成都有限公司 | High fluidization micro expansive high-strength grouting material |
| CN111848035A (en) * | 2020-07-20 | 2020-10-30 | 中建西部建设新材料科技有限公司 | Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof |
| CN111960790A (en) * | 2020-08-25 | 2020-11-20 | 雅安正兴汉白玉股份有限公司 | White marble waste slag used as environment-friendly material, coating, plate and building roadbed material and preparation method thereof |
| CN113061012A (en) * | 2021-04-21 | 2021-07-02 | 雅安正兴汉白玉股份有限公司 | Novel composite green building material |
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2021
- 2021-10-29 CN CN202111271430.3A patent/CN114014595B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466986A (en) * | 2013-09-02 | 2013-12-25 | 苏州科技学院 | Composite expanding agent for cement-based non-shrinkage grouting material |
| CN104402345A (en) * | 2014-11-28 | 2015-03-11 | 中建商品混凝土成都有限公司 | High fluidization micro expansive high-strength grouting material |
| CN111848035A (en) * | 2020-07-20 | 2020-10-30 | 中建西部建设新材料科技有限公司 | Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof |
| CN111960790A (en) * | 2020-08-25 | 2020-11-20 | 雅安正兴汉白玉股份有限公司 | White marble waste slag used as environment-friendly material, coating, plate and building roadbed material and preparation method thereof |
| CN113061012A (en) * | 2021-04-21 | 2021-07-02 | 雅安正兴汉白玉股份有限公司 | Novel composite green building material |
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