CN111410471A - Large-flow-state high-strength lightweight aggregate concrete and preparation method thereof - Google Patents
Large-flow-state high-strength lightweight aggregate concrete and preparation method thereof Download PDFInfo
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- CN111410471A CN111410471A CN201911122734.6A CN201911122734A CN111410471A CN 111410471 A CN111410471 A CN 111410471A CN 201911122734 A CN201911122734 A CN 201911122734A CN 111410471 A CN111410471 A CN 111410471A
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
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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
- C04B2111/00008—Obtaining or using nanotechnology related materials
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a large flow state high strength lightweight aggregate concrete and a preparation method thereof, wherein the lightweight aggregate concrete comprises: dipping the lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water; the impregnated lightweight aggregate is modified by impregnation through impregnation liquid, and the impregnation liquid is mixed slurry of high polymer resin and superfine cement; the cementing material comprises cement, nano glass powder and superfine mineral powder. The preparation method comprises the following steps: preparing the impregnated lightweight aggregate: soaking the lightweight aggregate in the impregnation liquid for a preset time to perform enhancement modification to obtain an impregnated lightweight aggregate; preparing lightweight aggregate concrete: and mixing and stirring the impregnated lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water to obtain the lightweight aggregate concrete. The invention has the characteristics of good fluidity, long-term maintenance of working performance, difficult floating of lightweight aggregate, high compressive strength and small shrinkage creep, and can be used for structures with damping requirements in simply supported box girders, large-span bridges and difficult mountainous areas.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to high-flow-state high-strength lightweight aggregate concrete and a preparation method thereof.
Background
In order to meet the rapid development of economy and society in China and the requirement of people on convenient travel, railways, particularly high-speed railways, are developed vigorously in recent years. In order to reduce the land for railway construction, the high-speed railway in China generally adopts a construction mode of replacing roads with bridges, and the span of the bridge is gradually increased, at present, the construction of the high-speed railway bridge in China advances from a 32m simple box girder to a 40m span simple box girder, and after the span of the bridge is increased to 40m, the pier column construction cost can be reduced by 20%, the occupied land of the bridge is saved by 20%, and the technical economy of increasing the span of the bridge is very obvious. However, after the span of the bridge is increased, the self weight of the bridge is increased in the same proportion, which brings great difficulty to site construction transportation and bridge structure design; for this reason, a light-weight and high-strength material must be used to reduce the self weight of the structure. The concrete is used as a building material with the largest bridge construction consumption, and the influence of the weight change on the self weight of the bridge structure is the largest; in addition, after the dead weight of the bridge structure is reduced, the anti-seismic performance of the bridge structure is correspondingly improved, so that the adoption of a large-flow-state light high-strength concrete preparation technology is a main technical approach for realizing the increase of the bridge span.
The lightweight aggregate concrete has a density of less than 1950kg/m3The concrete is prepared by adopting the lightweight aggregate with lighter volume weight, and the lightweight aggregate concrete has the characteristics of heat preservation, fire resistance, sound insulation, good earthquake resistance and the like besides the capacity weight reduction, has incomparable performance compared with the common concrete, and has good social effectBenefit, economic benefit and environmental benefit. At present, the most applied lightweight aggregate concrete is the lightweight aggregate concrete with the strength grade below C50, and the lightweight aggregate in the large-flow concrete is easy to float upwards, so the application of the high-strength pumping concrete with the large-flow state and the strength exceeding C60 is less. The water-cement ratio of the large-flow-state high-strength lightweight aggregate concrete is relatively low, the lightweight aggregate is easy to absorb water, so that the working performance is difficult to maintain, meanwhile, the problem of upward floating of the lightweight aggregate after the fluidity is increased is particularly obvious, and in the pumping process, the upward floating of the lightweight aggregate can cause the increase of the pump pressure and easily cause the pipe blockage phenomenon; in addition, the lightweight aggregate concrete generally has a large shrinkage and creep, and its brittleness gradually increases with an increase in strength, and it is difficult to satisfy the requirements of a bridge structure.
For the difficult problem that the working performance of concrete is difficult to maintain, the prior art mainly adopts an aggregate soaking mode, but the saturation degree is usually difficult to control by soaking, and the light aggregate which is not saturated by water still absorbs water when the concrete is mixed, so that the working performance is reduced; in addition, in the case of porous lightweight aggregate, once water absorption is saturated, the strength of the lightweight aggregate is reduced, and it is difficult to prepare high-strength lightweight aggregate concrete.
For the technical problem of inhibiting the floating of the lightweight aggregate, the prior art mainly adds thickening components such as cellulose ether and high molecular polymer fiber, but the thickening components not only cause the reduction of the strength and the fluidity of the concrete and increase the shrinkage creep, but also generally need to increase the water consumption when adding the thickening components, which is very unfavorable for preparing the high-strength lightweight aggregate concrete by using the concrete;
for the technical problem of preparing the high-strength lightweight aggregate, because the strength of the lightweight aggregate is reduced, the prior art mainly adopts a lower water-cement ratio and a higher cement consumption to improve the strength of slurry, the prepared lightweight aggregate concrete has poorer working performance, and in addition, the high consumption of the cementing material can also increase the shrinkage creep of the concrete.
Disclosure of Invention
Aiming at the problems of difficult maintenance of working performance, easy floating of lightweight aggregate and large shrinkage creep of the existing lightweight aggregate concrete, the invention provides the large-flow-state high-strength lightweight aggregate concrete and the preparation method thereof, which have the characteristics of good fluidity, long-term maintenance of working performance, difficult floating of lightweight aggregate, high compressive strength and small shrinkage creep, and can be used for simply supported box girders, large-span bridges and structures with shock absorption requirements in hard mountainous areas.
In order to achieve the above object, a first object of the present invention is to provide a high-flow high-strength lightweight aggregate concrete, comprising: dipping the lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water;
the impregnated lightweight aggregate is modified by impregnation through an impregnation liquid, and the impregnation liquid is mixed slurry of high polymer resin and superfine cement;
the cementing material comprises cement, nano glass powder and superfine mineral powder.
As a further improvement of the invention, the impregnated lightweight aggregate is 500-650 parts by weight, the fine aggregate is 640-800 parts by weight, the cementing material is 480-580 parts by weight, the water reducing agent is 5-8 parts by weight, and the water is 145-200 parts by weight.
As a further improvement of the invention, the prepared lightweight aggregate concrete has the volume weight of 1800kg/m3～1950kg/m3。
As a further improvement of the invention, the lightweight aggregate comprises one or more of shale ceramsite and fly ash ceramsite;
the lightweight aggregate had a bulk density of 700kg/m before impregnation3～800kg/m3The cylinder pressure strength of the ceramsite is 4MPa to 5MPa, and the 1d water absorption of the ceramsite is 6 percent to 9 percent;
after impregnation, the cylinder pressure strength of the impregnated lightweight aggregate is 9MPa to 12MPa, and the 1d water absorption is 0.3 percent to 0.6 percent.
As a further improvement of the invention, in the impregnation liquid,
the high polymer resin comprises one of epoxy resin, polyurethane resin and acrylic resin, and the viscosity of the high polymer resin is 50-100 mPa.s;
the superfine cement accounts for 5-25% of the total weight of the impregnation liquid, and is superfine portland cement with the particle size of 0.1-20 μm.
As a further improvement of the invention, the fine aggregate comprises one or more of river sand and machine-made sand, and the fineness modulus of the river sand is 2.1-2.3.
As a further improvement of the invention, in the cement,
the cement comprises one or more of P.O42.5 cement or P.O52.5 cement;
the nano glass powder accounts for 10-30% of the total weight of the cementing material, and the particle size of the nano glass powder is 10-100 nm;
the superfine mineral powder accounts for 10-20% of the total weight of the cementing material, and the particle size of the superfine mineral powder is 0.5-20 μm.
As a further improvement of the invention, the water reducing agent is a polycarboxylic acid water reducing agent.
The second purpose of the invention is to provide a preparation method of the high-flow-state high-strength lightweight aggregate concrete, which comprises the following steps:
preparing the impregnated lightweight aggregate:
soaking the lightweight aggregate in a soaking solution for a preset time to perform enhancement modification to obtain the soaked lightweight aggregate; wherein the impregnation liquid is a mixed slurry of polymer resin and superfine cement;
preparing lightweight aggregate concrete:
mixing and stirring the impregnated lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water to obtain lightweight aggregate concrete; wherein the cementing material comprises cement, nano glass powder and superfine mineral powder.
As a further improvement of the invention, the soaking time is 1.5-2.5 h.
Compared with the prior art, the invention has the beneficial effects that:
1. light weight and high strength: the light aggregate is modified by the impregnating solution, the strength of the light aggregate is improved, and light high-strength light aggregate concrete is prepared;
2. large flow state and good working performance: the impregnating solution is used for plugging holes in the lightweight aggregate, the water absorption of the lightweight aggregate is greatly reduced, and the impregnated lightweight aggregate is used for preparing the large-flow-state lightweight aggregate concrete;
3. the lightweight aggregate is not easy to float upwards: after the lightweight aggregate is impregnated, part of the impregnated lightweight aggregate can be adhered into a whole, the upward floating resistance of the lightweight aggregate is increased, and the lightweight aggregate is difficult to float upwards in large-flow concrete;
4. low shrinkage creep performance: after the inner holes of the impregnated lightweight aggregate are blocked by the impregnating solution, the water absorption is reduced, and the shrinkage creep is reduced;
5. excellent anti-freezing performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a large-flow-state high-strength lightweight aggregate concrete and a preparation method thereof, aiming at realizing the characteristics of light weight, high strength, large fluidity, long-term maintenance of working performance, difficult floating of lightweight aggregate and small shrinkage and creep.
Starting from the modification of the lightweight aggregate, the invention adopts the impregnating solution consisting of low-viscosity polymer resin and superfine cement to reinforce and modify the lightweight aggregate; the modification process comprises the following steps: the impregnating solution is immersed into the lightweight aggregate to block holes which are easy to absorb water of the lightweight aggregate, and a coating layer is formed on the surface of the lightweight aggregate; after the impregnation liquid is hardened, the strength of the lightweight aggregate can be improved, so that the strength of the lightweight aggregate concrete is further improved, and the problems that the working performance is difficult to maintain and the strength of the lightweight aggregate is low due to the fact that the lightweight aggregate is easy to absorb water are solved. The high-strength and high-toughness lightweight aggregate concrete can be prepared by mixing the modified impregnated lightweight aggregate with the fine aggregate, the cementing material and the like, and the lightweight aggregate is not easy to absorb water in the later period, so that the shrinkage creep of the lightweight aggregate concrete is reduced; in addition, after the lightweight aggregate is impregnated, partial lightweight aggregates are adhered together, and the lightweight aggregates adhered together in the large-flow concrete are not easy to float upwards. The lightweight aggregate concrete prepared by the invention has the characteristics of large flow state, good working performance maintenance, difficult floating of the lightweight aggregate, high compressive strength and small shrinkage creep, and is suitable for bridge structures and building structures with pumping requirements.
The invention is described in further detail below:
the invention provides a large flow state high strength lightweight aggregate concrete, comprising: dipping the lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water; the impregnated lightweight aggregate is obtained by impregnating the lightweight aggregate with an impregnating solution, wherein the impregnating solution is a mixed slurry of polymer resin and superfine cement; the cementing material comprises cement, nano glass powder and superfine mineral powder.
The addition amount of the components is as follows: according to the weight parts, the impregnated lightweight aggregate is 500-650 parts, the fine aggregate is 640-800 parts, the cementing material is 480-580 parts, the water reducing agent is 5-8 parts, and the water is 145-200 parts; further, taking each side of lightweight aggregate concrete as an example, the lightweight aggregate in each side of lightweight aggregate concrete is 500 kg-650 kg, the fine aggregate is 700 kg-800 kg, the cementing material is 480 kg-580 kg, the water reducing agent is 5 kg-8 kg, the water consumption is 150 kg-200 kg, and the volume weight of the prepared lightweight aggregate concrete is 1800kg/m3～1950kg/m3。
Specifically, the method comprises the following steps:
the lightweight aggregate adopted by the impregnated lightweight aggregate comprises one or more of shale ceramsite and fly ash ceramsite; the polymer resin in the impregnation liquid comprises one of epoxy resin, polyurethane resin and acrylic resin, and the viscosity of the polymer resin is 50-100 mPa.s; the superfine cement in the impregnating solution accounts for 5-25 percent of the total weight of the impregnating solution, preferably 5-10 percent, and the grain diameter is 0.1-20 mu m. Wherein the lightweight aggregate has a bulk density of 700kg/m before impregnation3～800kg/m3The cylinder pressure strength of the ceramsite is 4MPa to 5MPa, and the 1d water absorption of the ceramsite is 6 percent to 9 percent; after impregnation, the cylinder pressure strength of the impregnated lightweight aggregate is 9MPa to 12MPa, and the 1d water absorption is 0.3 percent to 0.6 percent.
The fine aggregate comprises one or more of river sand and machine-made sand, and the fineness modulus of the river sand is 2.1-2.3.
The cement in the cementing material comprises one or more of P.O42.5 cement or P.O52.5 cement, superfine mineral powder in the cementing material accounts for 10-20% of the total weight of the cementing material, the grain diameter of the superfine mineral powder is 0.5-20 μm, nano glass powder in the cementing material accounts for 10-30% of the total weight of the cementing material, the silicon dioxide content of the nano glass powder is more than 99%, and the grain diameter is 10-100 nm.
The water reducing agent is a polycarboxylate water reducing agent, the solid content of the water reducing agent is 40%, and the water reducing rate is 35%.
The invention also provides a preparation method of the high-flow-state high-strength lightweight aggregate concrete, which comprises the following steps:
s1, preparing the impregnated lightweight aggregate:
soaking the lightweight aggregate in the impregnation liquid for a preset time to perform enhancement modification to obtain an impregnated lightweight aggregate; wherein, the impregnation liquid is a mixed slurry of polymer resin and superfine cement, and the soaking time is 1.5-2.5 h, preferably 2 h.
S2, preparing lightweight aggregate concrete:
and mixing and stirring the impregnated lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water to obtain the lightweight aggregate concrete.
Further, in the preparation process, the raw materials and the mixture ratio of the components in the lightweight aggregate concrete are properly selected.
The working mechanism of the invention is as follows:
the existing lightweight aggregate is usually a porous material, the strength of the lightweight aggregate is relatively low, the water absorption rate is large, the lightweight aggregate is impregnated by fully utilizing an impregnating solution consisting of low-viscosity polymer resin and superfine cement, slurry is impregnated into holes in the lightweight aggregate, the polymer resin and the cement are subjected to composite reaction, condensation and hardening to block the holes of the lightweight aggregate, the water absorption rate of the lightweight aggregate is reduced, the cylinder pressure strength of the lightweight aggregate is greatly improved after the lightweight aggregate is dried, and the strength of the lightweight aggregate is increased along with the increase of the using amount of the superfine cement; the nano glass powder and the superfine mineral powder are compounded to improve the slurry strength, and in addition, the water consumption of the concrete is reduced and the working performance of the concrete is kept by utilizing the hydrophobicity of the nano glass powder.
The large-flow-state high-strength lightweight aggregate concrete prepared by the invention has the following properties:
the density of the lightweight aggregate concrete is less than or equal to 1900kg/m3The machine-out slump is 180-200 mm, the machine-out slump for 1h is 160-180 mm, the compressive strength of the 28d concrete is more than or equal to 65MPa, the elastic modulus of the 28d concrete is 31-34 GPa, the drying shrinkage of the 56d concrete is less than or equal to 400 mu, the creep strain of the 56d concrete is 0.6mm/m, and the dynamic elastic modulus retention rate of 300 times of freeze-thaw cycle is more than or equal to 75 percent.
The following examples demonstrate the above properties:
the following 3 examples are listed to test and illustrate the specific mixture ratio and addition amount of each component, and the addition amount in the corresponding range of each component can achieve the above performance based on the working mechanism of each component in the application in the same way, so that the specific mixture ratio and addition amount are not listed here.
Example 1
The lightweight aggregate is soaked in the mixed solution of low-viscosity polymer resin and superfine cement, the dosage of the superfine cement is 5 percent, the soaking time is 2 hours, the drying time is 4 hours, the adopted ceramsite is shale ceramsite, the water absorption rate of the ceramsite 1d is 6.8 percent, and the cylinder pressure strength is 5 MPa.
The formula of the lightweight aggregate concrete prepared based on the modified shale ceramisite is shown in table 1.
TABLE 1
Table 1 the effect of the formulation is shown in table 2.
TABLE 2
Example 2
The lightweight aggregate is soaked in the mixed liquid of low-viscosity polymer resin and superfine cement, the dosage of the superfine cement is 8 percent, the soaking time is 2 hours, the hot air drying is carried out for 4 hours, the adopted ceramsite is shale ceramsite, the 1d water absorption rate of the ceramsite is 6.8 percent, and the cylinder pressure strength is 5 MPa.
The formula of the lightweight aggregate concrete prepared based on the modified shale ceramisite is shown in table 3.
TABLE 3
Table 3 the effect of the formulation is shown in table 4.
TABLE 4
Example 3
The lightweight aggregate is soaked in the mixed solution of low-viscosity polymer resin and superfine cement, the dosage of the superfine cement is 10 percent, the soaking time is 2 hours, the hot air drying is carried out for 4 hours, the adopted ceramsite is shale ceramsite, the water absorption rate of the ceramsite 1d is 6.8 percent, and the cylinder pressure strength is 5 MPa.
The formula of the lightweight aggregate concrete prepared based on the modified shale ceramisite is shown in table 5.
TABLE 5
Table 5 the effect of the formulation is shown in table 6.
TABLE 6
It can be seen from the examples 1-3 that, in the invention, the lightweight aggregate is impregnated by the slurry composed of the low-viscosity polymer resin and the superfine cement, so that the water absorption rate of the lightweight aggregate can be reduced, the cylinder compressive strength of the lightweight aggregate is improved, the water consumption of the concrete can be reduced, the water-cement ratio is reduced, the slurry strength is improved, and the lightweight aggregate concrete with large flow state, high working performance retention, difficult floating of the lightweight aggregate, high compressive strength, low shrinkage creep and high durability can be obtained by matching the superfine mineral powder, the water reducing agent, the fine aggregate and water.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The high-flow-state high-strength lightweight aggregate concrete is characterized by comprising the following components in percentage by weight: dipping the lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water;
the impregnated lightweight aggregate is modified by impregnation through an impregnation liquid, and the impregnation liquid is mixed slurry of high polymer resin and superfine cement;
the cementing material comprises cement, nano glass powder and superfine mineral powder.
2. The high flow state high strength lightweight aggregate concrete according to claim 1, characterized in that the impregnated lightweight aggregate is 500 to 650 parts by weight, the fine aggregate is 640 to 800 parts by weight, the cementitious material is 480 to 580 parts by weight, the water reducing agent is 5 to 8 parts by weight, and the water is 145 to 200 parts by weight.
3. The high flow state high strength lightweight aggregate concrete according to claim 2, wherein the weight of the prepared lightweight aggregate concrete is 1800kg/m3～1950kg/m3。
4. The high flow state high strength lightweight aggregate concrete according to claim 1, wherein the lightweight aggregate comprises one or more of shale ceramisite and fly ash ceramisite;
the lightweight aggregate had a bulk density of 700kg/m before impregnation3～800kg/m3The cylinder pressure strength of the ceramsite is 4MPa to 5MPa, and the 1d water absorption of the ceramsite is 6 percent to 9 percent;
after impregnation, the cylinder pressure strength of the impregnated lightweight aggregate is 9MPa to 12MPa, and the 1d water absorption is 0.3 percent to 0.6 percent.
5. The high flow state high strength lightweight aggregate concrete according to claim 1, wherein in said impregnation liquid,
the high polymer resin comprises one of epoxy resin, polyurethane resin and acrylic resin, and the viscosity of the high polymer resin is 50-100 mPa.s;
the superfine cement accounts for 5-25% of the total weight of the impregnation liquid, and is superfine portland cement with the particle size of 0.1-20 μm.
6. The high flow state high strength lightweight aggregate concrete according to claim 1, wherein the fine aggregate comprises one or more of river sand and machine-made sand, and the fineness modulus of the river sand is 2.1-2.3.
7. The high flow state high strength lightweight aggregate concrete according to claim 1, wherein in said cement,
the cement comprises one or more of P.O42.5 cement or P.O52.5 cement;
the nano glass powder accounts for 10-30% of the total weight of the cementing material, and the particle size of the nano glass powder is 10-100 nm;
the superfine mineral powder accounts for 10-20% of the total weight of the cementing material, and the particle size of the superfine mineral powder is 0.5-20 μm.
8. The high flow regime, high strength and lightweight aggregate concrete of claim 1, wherein the water reducer is a polycarboxylic acid water reducer.
9. A method for preparing a high fluid high strength lightweight aggregate concrete according to any one of claims 1 to 8, which comprises:
preparing the impregnated lightweight aggregate:
soaking the lightweight aggregate in a soaking solution for a preset time to perform enhancement modification to obtain the soaked lightweight aggregate; wherein the impregnation liquid is a mixed slurry of polymer resin and superfine cement;
preparing lightweight aggregate concrete:
mixing and stirring the impregnated lightweight aggregate, the fine aggregate, the cementing material, the water reducing agent and water to obtain lightweight aggregate concrete; wherein the cementing material comprises cement, nano glass powder and superfine mineral powder.
10. The method of claim 9, wherein the soaking time is 1.5 to 2.5 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979192A (en) * | 2021-02-19 | 2021-06-18 | 建华建材（中国）有限公司 | Preparation method of lightweight aggregate |
| CN113248180A (en) * | 2021-04-12 | 2021-08-13 | 广西军泰建材有限公司 | Aggregate regulator for concrete and preparation method thereof |
| CN113845351A (en) * | 2021-10-28 | 2021-12-28 | 上海靓固生态环境科技股份有限公司 | Colored permeable pavement material and preparation process thereof |
| CN115477513A (en) * | 2022-09-14 | 2022-12-16 | 重庆中吉达环保科技有限公司 | High-strength lightweight aggregate concrete and preparation method thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003277118A (en) * | 2002-03-19 | 2003-10-02 | Building Research Institute | Fiber deposited aggregate and fiber reinforced concrete using this fiber deposited aggregate |
| CN1491917A (en) * | 2003-08-22 | 2004-04-28 | 武汉理工大学 | Process for preparing high-strength light aggregate concrete |
| CN101935175A (en) * | 2009-06-30 | 2011-01-05 | 中冶建筑研究总院有限公司 | Surface modification method of rubber aggregate for high-fluidity cement-based material |
| CN103723988A (en) * | 2013-12-09 | 2014-04-16 | 广西大学 | Light and high strength aerated concrete prepared with glass powder and preparation method thereof |
| CN103880311A (en) * | 2014-03-19 | 2014-06-25 | 南华大学 | Preparation method of cement mortar |
| CN105036657A (en) * | 2015-07-29 | 2015-11-11 | 国网智能电网研究院 | High-strength lightweight aggregate concrete and preparation method thereof |
| US10150701B2 (en) * | 2014-07-01 | 2018-12-11 | Aquasmart Enterprises, Llc | Coated-fine-aggregate, concrete composition and method |
| CN109456002A (en) * | 2018-12-08 | 2019-03-12 | 曙光装配式建筑科技（浙江）有限公司 | A kind of High Strength Regenerated Concrete and preparation method thereof |
| CN110041006A (en) * | 2019-06-03 | 2019-07-23 | 青岛中建富兴商砼有限公司 | A kind of high pumping LC15 haydite concrete and preparation method thereof |
| CN110156397A (en) * | 2019-05-07 | 2019-08-23 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of high-strength and high ductility Self-leveling lightweight aggregate concrete and its preparation method |
| CN110316989A (en) * | 2019-07-11 | 2019-10-11 | 济南大学 | Concrete coarse aggregate of carbon fiber and preparation method thereof is wrapped up in outside a kind of |
-
2019
- 2019-11-16 CN CN201911122734.6A patent/CN111410471B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003277118A (en) * | 2002-03-19 | 2003-10-02 | Building Research Institute | Fiber deposited aggregate and fiber reinforced concrete using this fiber deposited aggregate |
| CN1491917A (en) * | 2003-08-22 | 2004-04-28 | 武汉理工大学 | Process for preparing high-strength light aggregate concrete |
| CN1203023C (en) * | 2003-08-22 | 2005-05-25 | 武汉理工大学 | Process for preparing high-strength light aggregate concrete |
| CN101935175A (en) * | 2009-06-30 | 2011-01-05 | 中冶建筑研究总院有限公司 | Surface modification method of rubber aggregate for high-fluidity cement-based material |
| CN103723988A (en) * | 2013-12-09 | 2014-04-16 | 广西大学 | Light and high strength aerated concrete prepared with glass powder and preparation method thereof |
| CN103880311A (en) * | 2014-03-19 | 2014-06-25 | 南华大学 | Preparation method of cement mortar |
| US10150701B2 (en) * | 2014-07-01 | 2018-12-11 | Aquasmart Enterprises, Llc | Coated-fine-aggregate, concrete composition and method |
| CN105036657A (en) * | 2015-07-29 | 2015-11-11 | 国网智能电网研究院 | High-strength lightweight aggregate concrete and preparation method thereof |
| CN109456002A (en) * | 2018-12-08 | 2019-03-12 | 曙光装配式建筑科技（浙江）有限公司 | A kind of High Strength Regenerated Concrete and preparation method thereof |
| CN110156397A (en) * | 2019-05-07 | 2019-08-23 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of high-strength and high ductility Self-leveling lightweight aggregate concrete and its preparation method |
| CN110041006A (en) * | 2019-06-03 | 2019-07-23 | 青岛中建富兴商砼有限公司 | A kind of high pumping LC15 haydite concrete and preparation method thereof |
| CN110316989A (en) * | 2019-07-11 | 2019-10-11 | 济南大学 | Concrete coarse aggregate of carbon fiber and preparation method thereof is wrapped up in outside a kind of |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979192A (en) * | 2021-02-19 | 2021-06-18 | 建华建材（中国）有限公司 | Preparation method of lightweight aggregate |
| CN113248180A (en) * | 2021-04-12 | 2021-08-13 | 广西军泰建材有限公司 | Aggregate regulator for concrete and preparation method thereof |
| CN113845351A (en) * | 2021-10-28 | 2021-12-28 | 上海靓固生态环境科技股份有限公司 | Colored permeable pavement material and preparation process thereof |
| CN115477513A (en) * | 2022-09-14 | 2022-12-16 | 重庆中吉达环保科技有限公司 | High-strength lightweight aggregate concrete and preparation method thereof |
| CN115477513B (en) * | 2022-09-14 | 2023-08-04 | 重庆中吉达环保科技有限公司 | High-strength lightweight aggregate concrete and preparation method thereof |
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