CN112811932A - High-stability foam for foam concrete and preparation method thereof - Google Patents

High-stability foam for foam concrete and preparation method thereof Download PDF

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Publication number
CN112811932A
CN112811932A CN202110046052.2A CN202110046052A CN112811932A CN 112811932 A CN112811932 A CN 112811932A CN 202110046052 A CN202110046052 A CN 202110046052A CN 112811932 A CN112811932 A CN 112811932A
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CN
China
Prior art keywords
foam
foam concrete
stone powder
stability
wet
Prior art date
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Pending
Application number
CN202110046052.2A
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Chinese (zh)
Inventor
谭洪波
李光焰
邓秀峰
郑正旗
张俊杰
马保国
李相国
蹇守卫
黄健
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CN202110046052.2A priority Critical patent/CN112811932A/en
Publication of CN112811932A publication Critical patent/CN112811932A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • C04B38/106Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40Porous or lightweight materials

Abstract

The invention relates to a high-stability foam for foam concrete and a preparation method thereof, wherein the high-stability foam comprises the following raw material components in percentage by mass: 2 to 8 percent of wet-milled nano stone powder, 0.7 to 1 percent of foaming agent, 0.3 to 0.5 percent of thickening agent and the balance of water. Compared with the common foam, the high-stability foam provided by the invention has the advantages that the distance reduction can be improved by 20-51.1mm, the bleeding rate can be reduced by 43.9-81.5%, the instability of the foam concrete can be effectively solved, and the collapse of the foam concrete during construction can be reduced.

Description

High-stability foam for foam concrete and preparation method thereof
Technical Field
The invention belongs to the technical field of concrete using organic materials as effective components, and relates to high-stability foam for foam concrete and a preparation method thereof.
Background
The foam concrete is widely applied to the fields of road backfill, heat preservation and insulation roofs, inner partition walls and the like due to the characteristics of light weight and durability, but the foam concrete also has some defects inevitably: poor foam stability, low strength, inferior heat preservation property to organic heat preservation materials, high water absorption, larger self-contraction and the like. The instability of the foam concrete is caused by the instability of the foam, and the foam concrete is easy to collapse when being prepared into the ultra-low density foam concrete and is difficult to construct and apply in engineering. Therefore, it is important to prepare a fine, uniform and stable foam for reducing the instability of the foamed concrete and improving the strength.
The stone powder is solid waste in the production and processing process of stone, the average utilization rate of natural stone in China is only about 35%, and the stone processing can generate 20-30% of waste materials including leftover materials, waste stone powder and the like. Waste slurry generated by processing natural stone is discharged into rivers, and solid wastes are accumulated, so that land resources are greatly wasted. The effective utilization and treatment of these stone dust wastes have become an urgent problem to be solved in various stone industries.
The invention provides a high-stability foam prepared by utilizing wet-milled nano stone powder, which is prepared by mixing the wet-milled nano stone powder, sodium dodecyl sulfate, a thickening agent and water as main raw materials to prepare a foaming agent solution and preparing the high-stability foam under the action of a high-speed stirrer.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-stability foam for foam concrete and a preparation method thereof, aiming at the defects in the prior art, the foam has the advantages that the settlement distance can be improved by 20-51.1mm compared with the common foam, the bleeding rate can be reduced by 43.9-81.5%, the foam has higher stability, the comprehensive performance of the foam concrete is improved, and the application range of the foam concrete is expanded.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the high-stability foam for the foam concrete comprises the following raw material components in percentage by mass: 2-8% of wet-milled nano stone powder, 0.7-1% of foaming agent, 0.3-0.5% of thickening agent and the balance of water;
the preparation method of the wet-milled nano stone powder comprises the following steps: stone powder, water and a polycarboxylic acid water reducing agent are mixed according to the mass ratio of the stone powder: water: polycarboxylic acid water reducing agent 1: 2-3: weighing at a ratio of 0.004-0.01, pouring into a wet grinder, and mixing the materials with stone powder 3-4 times in mass and gradation of 10 mm: 8 mm: 5 mm: 3mm ═ 1: 4: 4: the zirconia grinding body of 1 is added into a wet grinding machine, ground for 120-150min at the speed of 400-450r/min, and sieved to obtain the wet grinding nano stone powder with the D50 of 200-300 nm.
According to the scheme, the foaming agent is sodium dodecyl sulfate, and the foaming times are more than 20 times.
According to the scheme, the thickening agent is hydroxypropyl methyl cellulose and welan gum according to the mass ratio of 1: 0.5-2 of the mixture.
According to the scheme, the stone powder is marble powder, and the specific surface area is more than or equal to 400m2Perkg. The wet-milled nano stone powder has high hydrophilicity, is easy to be adsorbed on the surface of foam liquid, and improves the stability of foam
According to the scheme, the water reducing rate of the polycarboxylate superplasticizer in the cement paste is more than 25%, and the fluidity is more than or equal to 200 mm.
The invention also comprises a preparation method of the high-stability foam for the foam concrete, which comprises the following steps:
1) weighing the raw material components in proportion for later use;
2) mixing wet-milled nano stone powder and water, uniformly dispersing by using ultrasonic waves, adding a thickening agent, uniformly stirring, adding a foaming agent, uniformly dispersing by using ultrasonic waves to obtain a foaming agent solution, and adding the foaming agent solution into a high-speed stirrer to stir to obtain high-stability foam.
According to the scheme, the stirring speed in the high-speed stirrer in the step 2) is 2000-2500r/min, and the stirring time is 60-90 s.
The invention also comprises the application of the high-stability foam in the aspect of foam concrete, wherein the high-stability foam and cement paste are mixed according to the volume ratio of 1: 0.58 to 0.71, stirring evenly and curing to obtain the foam concrete.
According to the scheme, the maintenance conditions are as follows: maintaining at relative humidity of more than 50% and temperature of 20 + -1 deg.C for 7 days.
According to the invention, the nano stone powder particles prepared by wet grinding are combined with the foaming agent sodium dodecyl sulfate and the thickening agent, so that the surface tension of a foam liquid film can be improved, the gas diffusion in foam is inhibited, the liquid loss in the foam liquid film is blocked, and the power of bubble shrinkage is reduced, thereby achieving the effect of improving the foam stability.
The invention has the beneficial effects that: 1. compared with the common foam, the high-stability foam provided by the invention has the advantages that the distance reduction can be improved by 20-51.1mm, the bleeding rate can be reduced by 43.9-81.5%, the instability of the foam concrete can be effectively solved, and the collapse of the foam concrete during construction can be reduced; 2. the method can improve the utilization of solid wastes such as stone powder and the like, reduce the cost, and has simple preparation steps and easy realization.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail with reference to the following examples.
The stone powder used in the embodiment of the invention has a specific surface area of 420m2Perkg of marble powder, the water reducing rate of the used polycarboxylate superplasticizer is 26.3 percent, the solid content is more than or equal to 92 percent, the fluidity is more than or equal to 200mm, the used foaming agent is sodium dodecyl sulfate, the foaming times are 20 times, the purity is 98.5 percent, and the used welan gum is purchased from Shandong Jingxin Biotech limited, and the viscosity is 1500-.
Examples 1 to 8 and comparative example 1
The preparation method of the high-stability foam comprises the following steps:
the stone powder comprises the following components in percentage by mass: water: polycarboxylic acid water reducing agent 1: 2-3: 0.004-0.01 to weigh the raw materials and pour the raw materials into a wet grinding tank, and then the raw materials with the mass 3-4 times of stone powder and the gradation of 10mm are mixed: 8 mm: 5 mm: 3mm ═ 1: 4: 4: adding the zirconium oxide grinding body of 1 into a wet grinding tank, sealing and fixing, then starting a wet grinder, grinding for 120min at the speed of 400r/min, and filtering to obtain wet grinding nano stone powder with the D50 of 200 and 300nm, wherein the proportion of the wet grinding nano stone powder is shown in table 1, and three stone powders are recorded as A, B and C.
TABLE 1 Wet-milling nanometer stone powder compounding ratio
The ratio design and performance evaluation of the foaming agent solution are shown in Table 2, and the specific implementation modes of the examples 1 to 8 are as follows: according to the proportion of the foaming agent solution in the table 2, the wet-milled nano stone powder and water are mixed in parts and are dispersed for 30min by using ultrasonic waves, then the thickening agent in parts is added into the mixture and is stirred for 30min by using magnetic force, then the foaming agent in parts is added into the mixture and is dispersed for 10min by using ultrasonic waves, so that the foaming agent solution is obtained, finally the prepared foaming agent solution is transferred into a high-speed stirrer, the foaming agent solution is stirred at the rotating speed of 2400r/min for 60s, and the high-stability foam is prepared. The specific embodiment of comparative example 1 is: according to the proportion of the foaming agent solution in the table 2, the thickening agent and water are mixed and stirred for 30min by magnetic force, and then the foaming agent is added and dispersed for 10min by ultrasonic to prepare the foaming agent solution. And finally, transferring the prepared foaming agent solution into a high-speed stirrer, stirring the foaming agent solution at the rotating speed of 2400r/min, and stirring for 60s to obtain the reference foam. The settlement distance and the bleeding rate of the foam are measured by a foam settlement distance measuring instrument according to the national standard JG/T266-.
TABLE 2 materials proportioning design (parts by mass)
The evaluation of the properties of the foam samples of examples 1 to 8 and comparative example 1 is shown in Table 3.
Table 3 evaluation of the properties of the examples
As can be seen from the performance evaluation data of each foam sample in table 3, it is known from examples 2 and 3 that the introduction of the thickener may result in a slight increase in foam density, and in addition, the wet-milled nano stone powder incorporation may result in an increase in the 1h settling distance of the foam and a decrease in the 1h bleeding rate, wherein examples 1 to 8 may increase the 1h settling distance by 20 to 51.1mm and the bleeding rate may be decreased by 43.9 to 81.5% as compared to comparative example 1, and when the casting depth of the foam concrete reaches 1000mm, the density ratio of the bottom portion to the top portion is from 1: 1.21 to 1: 1.01, except for comparative example 1, none of examples 1-8 suffered collapse, indicating that wet milling of the nano-stone powder particles improved the foam stability.

Claims (9)

1. The high-stability foam for the foam concrete is characterized by comprising the following raw material components in percentage by mass: 2-8% of wet-milled nano stone powder, 0.7-1% of foaming agent, 0.3-0.5% of thickening agent and the balance of water;
the preparation method of the wet-milled nano stone powder comprises the following steps: stone powder, water and a polycarboxylic acid water reducing agent are mixed according to the mass ratio of the stone powder: water: polycarboxylic acid water reducing agent 1: 2-3: weighing at a ratio of 0.004-0.01, pouring into a wet grinder, and mixing the materials with stone powder 3-4 times in mass and gradation of 10 mm: 8 mm: 5 mm: 3mm ═ 1: 4: 4: the zirconia grinding body of 1 is added into a wet grinding machine, ground for 120-150min at the speed of 400-450r/min, and sieved to obtain the wet grinding nano stone powder with the D50 of 200-300 nm.
2. The highly stable foam for foam concrete according to claim 1, wherein the foaming agent is sodium lauryl sulfate, and the expansion ratio is 20 or more.
3. The high-stability foam for foam concrete according to claim 1, wherein the thickener is hydroxypropyl methylcellulose and welan gum in a mass ratio of 1: 0.5-2 of the mixture.
4. The highly stable foam for foam concrete according to claim 1, wherein said stone powder is marble powder having a specific surface area of not less than 400m2/Kg。
5. The highly stable foam for foam concrete according to claim 1, wherein the polycarboxylic acid water reducing agent has a water reducing rate of 25% or more in a cement paste and a fluidity of 200mm or more.
6. A method for preparing a highly stable foam for foam concrete according to any one of claims 1 to 5, comprising the following steps:
1) weighing the raw material components in proportion for later use;
2) mixing wet-milled nano stone powder and water, uniformly dispersing by using ultrasonic waves, adding a thickening agent, uniformly stirring, adding a foaming agent, uniformly dispersing by using ultrasonic waves to obtain a foaming agent solution, and adding the foaming agent solution into a high-speed stirrer to stir to obtain high-stability foam.
7. The method for preparing highly stable foam for foam concrete according to claim 6, wherein the rotation speed of the high-speed mixer in the step 2) is 2000-2500r/min, and the mixing time is 60-90 s.
8. Use of a high stability foam for foam concrete according to any one of claims 1 to 5 in foam concrete, wherein the high stability foam is mixed with a cement paste in a volume ratio of 1: 0.58 to 0.71, stirring evenly and curing to obtain the foam concrete.
9. The use of the highly stable foam for foam concrete according to claim 8 for foam concrete, wherein the curing conditions are: maintaining at relative humidity of more than 50% and temperature of 20 + -1 deg.C for 7 days.
CN202110046052.2A 2021-01-14 2021-01-14 High-stability foam for foam concrete and preparation method thereof Pending CN112811932A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754371A (en) * 2021-08-30 2021-12-07 广东盛瑞科技股份有限公司 Foamed light soil with high stone powder content and preparation method thereof
CN113896450A (en) * 2021-09-22 2022-01-07 西安理工大学 Powder foaming agent for preparing cement-based foam material and preparation method thereof
CN114105537A (en) * 2021-11-29 2022-03-01 湖北工业大学 Method for preparing copper tailing foam concrete by wet grinding foaming
CN114538837A (en) * 2022-03-22 2022-05-27 郁登科 Foam concrete formula and production process
CN113754371B (en) * 2021-08-30 2022-10-21 广东盛瑞科技股份有限公司 Foamed light soil with high stone powder content and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106588116A (en) * 2016-12-31 2017-04-26 南京友西科技股份有限公司 Nano silicon dioxide/lauryl alcohol modified compound foaming agent and preparation method
CN107117852A (en) * 2017-03-24 2017-09-01 句容宜发建材科技有限公司 Foam concrete nanometer foaming agent and its building block and its manufacture method
EP3225607A1 (en) * 2016-03-30 2017-10-04 Ipsiis Process for the preparation of solid porous mineral foams and their uses
US20170321026A1 (en) * 2016-05-05 2017-11-09 Nano And Advanced Materials Institute Limited Foam formulation and method of preparing solid porous materials with same
CN110304847A (en) * 2019-04-11 2019-10-08 武汉理工大学 A kind of wet-milling carbide slag exciting agent and its preparation method and application
US20200157406A1 (en) * 2018-11-19 2020-05-21 China University Of Petroleum-Beijing Ultra-dry three-phase flue gas foam for oil-gas fields and preparation method thereof
CN111960856A (en) * 2020-08-27 2020-11-20 陈谓清 Heat-insulating sound-insulating concrete and preparation method and construction method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3225607A1 (en) * 2016-03-30 2017-10-04 Ipsiis Process for the preparation of solid porous mineral foams and their uses
US20170321026A1 (en) * 2016-05-05 2017-11-09 Nano And Advanced Materials Institute Limited Foam formulation and method of preparing solid porous materials with same
CN106588116A (en) * 2016-12-31 2017-04-26 南京友西科技股份有限公司 Nano silicon dioxide/lauryl alcohol modified compound foaming agent and preparation method
CN107117852A (en) * 2017-03-24 2017-09-01 句容宜发建材科技有限公司 Foam concrete nanometer foaming agent and its building block and its manufacture method
US20200157406A1 (en) * 2018-11-19 2020-05-21 China University Of Petroleum-Beijing Ultra-dry three-phase flue gas foam for oil-gas fields and preparation method thereof
CN110304847A (en) * 2019-04-11 2019-10-08 武汉理工大学 A kind of wet-milling carbide slag exciting agent and its preparation method and application
CN111960856A (en) * 2020-08-27 2020-11-20 陈谓清 Heat-insulating sound-insulating concrete and preparation method and construction method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754371A (en) * 2021-08-30 2021-12-07 广东盛瑞科技股份有限公司 Foamed light soil with high stone powder content and preparation method thereof
CN113754371B (en) * 2021-08-30 2022-10-21 广东盛瑞科技股份有限公司 Foamed light soil with high stone powder content and preparation method thereof
CN113896450A (en) * 2021-09-22 2022-01-07 西安理工大学 Powder foaming agent for preparing cement-based foam material and preparation method thereof
CN114105537A (en) * 2021-11-29 2022-03-01 湖北工业大学 Method for preparing copper tailing foam concrete by wet grinding foaming
CN114105537B (en) * 2021-11-29 2022-06-21 湖北工业大学 Method for preparing copper tailing foam concrete by wet grinding foaming
CN114538837A (en) * 2022-03-22 2022-05-27 郁登科 Foam concrete formula and production process

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