CN110563392A - lightweight anti-bending concrete - Google Patents
lightweight anti-bending concrete Download PDFInfo
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- CN110563392A CN110563392A CN201910841982.XA CN201910841982A CN110563392A CN 110563392 A CN110563392 A CN 110563392A CN 201910841982 A CN201910841982 A CN 201910841982A CN 110563392 A CN110563392 A CN 110563392A
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- magnesium sulfate
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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
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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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- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The lightweight fracture-resistant concrete is characterized in that: the paint consists of the following components: 100-160 parts of water, 150-350 parts of cement, 150-230 parts of fine aggregate, 150-200 parts of modified hollow glass microsphere, 80-120 parts of magnesium sulfate whisker, 80-100 parts of unsaturated polyester resin, 2-5 parts of initiator, 10-30 parts of foaming agent and 5-15 parts of water reducer. The beneficial effect is that the problems of high specific gravity, high water absorption rate and no fracture resistance of the existing lightweight concrete are solved.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to concrete, in particular to lightweight anti-bending concrete.
Background
Along with the upgrading of industry, manufacturing enterprises have higher and higher requirements on production environment, clean rooms become necessary conditions for producing high-end products, and at present, glass magnesium boards made of glass fibers, rock wool and the like are mainly adopted for manufacturing the clean rooms, so that the materials are high in strength, fireproof and low in price. However, the glass fiber and rock wool produced after the glass magnesium board is manufactured and scrapped in the later period are difficult to recover, which causes great influence on the environment, and along with the prolonging of the service life, the rock wool and the like can absorb water and expand, which causes the deformation of the clean room, and further can not meet the requirement of cleanness.
The invention patent of application No. 201611184952.9 discloses a lightweight foamed concrete, which is prepared from portland cement, fly ash, melamine water reducing agent, coagulant and composite foaming agent, wherein the adopted foaming agent has good foam stabilizing effect, but the density reduction range is small. The invention patent of application No. 201810407121.6 discloses a light foamed composite concrete wallboard, which has the characteristics of light weight, high strength, excellent shock resistance and earthquake resistance, but the compressive strength is still less than 6MPa, and the water absorption rate is higher.
Disclosure of Invention
The invention mainly aims to provide lightweight anti-bending concrete, which solves the problems of high specific gravity and water absorption rate and non-bending resistance of the conventional lightweight concrete.
In order to achieve the technical effects, the invention adopts the following technical scheme:
The lightweight fracture-resistant concrete consists of the following components: 100-160 parts of water, 150-350 parts of cement, 150-230 parts of fine aggregate, 150-200 parts of modified hollow glass microsphere, 80-120 parts of magnesium sulfate whisker, 80-100 parts of unsaturated polyester resin, 2-5 parts of initiator, 10-30 parts of foaming agent and 5-15 parts of water reducer.
The modified hollow glass microspheres are silane modified hollow glass microspheres with the diameter of 30-50 microns, reduce the specific gravity of concrete, insulate heat, have good bonding property with unsaturated polyester resin thereof, and improve the compressive strength.
The magnesium sulfate whisker is basic magnesium sulfate whisker, has the diameter of 200-300 meshes, contains crystal water, has a flame retardant effect, is in a fiber structure, and synergistically enhances the flexural resistance of concrete with the modified hollow glass beads.
The viscosity of the unsaturated polyester resin is 0.3-0.4 Pa.S, crosslinking can be generated, the water absorption of the inorganic filler is reduced, the strength of concrete is enhanced, and the wall body is prevented from cracking during drilling and other processing.
The initiator is azodicyano valeric acid to crosslink unsaturated polyester resin to form stereo network structure.
the foaming agent is sodium dodecyl benzene sulfonate, and the water reducing agent is sodium methylene dimethyl dinaphthalene sulfonate.
The invention also provides a method for preparing the lightweight fracture-resistant concrete, which comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass microspheres, the magnesium sulfate whiskers and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
the invention has the beneficial effects that:
(1) The invention adopts the modified hollow glass beads, which not only can reduce the specific gravity of concrete, but also can enhance the compression resistance and the heat insulation performance.
(2) The basic magnesium sulfate whisker is used as filling, and can form a multidimensional structure with hollow glass beads in a synergistic manner, so that the fracture resistance is enhanced, and the flame retardance is improved.
(3) the unsaturated polyester resin is introduced, so that inorganic filler can be wrapped, the water absorption is reduced, the support is formed through crosslinking, the wall body is prevented from cracking during processing such as drilling, and the deformation and the expansion of concrete are reduced.
Detailed Description
For further understanding of the present invention, the following embodiments are provided to illustrate the technical solutions of the present invention in detail, and the scope of the present invention is not limited by the following embodiments.
Example 1
The lightweight fracture-resistant concrete consists of the following components: 100 parts of water, 150 parts of cement, 150 parts of fine aggregate, 150 parts of silane modified hollow glass microsphere, 80 parts of magnesium sulfate whisker, 80 parts of unsaturated polyester resin, 2 parts of azodicyano valeric acid, 10 parts of sodium dodecyl benzene sulfonate and 5 parts of methylene dimethyl dinaphthyl sodium sulfonate.
Wherein the diameter of the silane modified hollow glass bead is 30 μm.
The magnesium sulfate whisker is basic magnesium sulfate whisker with the diameter of 200 meshes.
The viscosity of the unsaturated polyester resin was 0.3 pa.s.
The method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass microspheres, the magnesium sulfate whiskers and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Example 2
the lightweight fracture-resistant concrete consists of the following components: 160 parts of water, 350 parts of cement, 230 parts of fine aggregate, 200 parts of silane modified hollow glass microspheres, 120 parts of magnesium sulfate whiskers, 100 parts of unsaturated polyester resin, 5 parts of azodicyano valeric acid, 30 parts of sodium dodecyl benzene sulfonate and 15 parts of methylene dimethyl dinaphthalene sodium sulfonate.
Wherein the diameter of the silane modified hollow glass bead is 50 μm.
The magnesium sulfate whisker is basic magnesium sulfate whisker with the diameter of 300 meshes.
The viscosity of the unsaturated polyester resin was 0.4 pa.s.
the method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass microspheres, the magnesium sulfate whiskers and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) and (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Example 3
The lightweight fracture-resistant concrete consists of the following components: 130 parts of water, 200 parts of cement, 200 parts of fine aggregate, 180 parts of silane modified hollow glass microsphere, 100 parts of magnesium sulfate whisker, 90 parts of unsaturated polyester resin, 4 parts of azodicyano valeric acid, 20 parts of sodium dodecyl benzene sulfonate and 12 parts of methylene dimethyl dinaphthyl sodium sulfonate.
Wherein the hollow glass microballoons are silane modified, and the diameter is 40 mu m.
The magnesium sulfate whisker is basic magnesium sulfate whisker with the diameter of 280 meshes.
The viscosity of the unsaturated polyester resin was 0.35 Pa.S.
The method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass microspheres, the magnesium sulfate whiskers and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Comparative example 1
the lightweight fracture-resistant concrete consists of the following components: 100 parts of water, 150 parts of cement, 150 parts of fine aggregate, 80 parts of magnesium sulfate whisker, 80 parts of unsaturated polyester resin, 2 parts of azodicyano valeric acid, 10 parts of sodium dodecyl benzene sulfonate and 5 parts of methylene dimethyl dinaphthyl sodium sulfonate.
The magnesium sulfate whisker is basic magnesium sulfate whisker with the diameter of 200 meshes.
The viscosity of the unsaturated polyester resin was 0.3 pa.s.
The method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) Accurately metering each component, uniformly mixing the magnesium sulfate whisker and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Comparative example 2
The lightweight fracture-resistant concrete consists of the following components: 100 parts of water, 150 parts of cement, 150 parts of fine aggregate, 150 parts of silane modified hollow glass microsphere, 80 parts of unsaturated polyester resin, 2 parts of azodicyano valeric acid, 10 parts of sodium dodecyl benzene sulfonate and 5 parts of methylene dimethyl dinaphthyl sodium sulfonate.
wherein the diameter of the silane modified hollow glass bead is 30 μm.
The viscosity of the unsaturated polyester resin was 0.3 pa.s.
The method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass beads and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture.
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Comparative example 3
The lightweight fracture-resistant concrete consists of the following components: 100 parts of water, 150 parts of cement, 150 parts of fine aggregate, 150 parts of silane modified hollow glass microsphere, 80 parts of magnesium sulfate whisker, 10 parts of sodium dodecyl benzene sulfonate and 5 parts of methylene dimethyl dinaphthyl sodium sulfonate.
Wherein the modified hollow glass bead is silane modified hollow glass bead with the diameter of 30 μm.
The magnesium sulfate whisker is basic magnesium sulfate whisker with the diameter of 200 meshes.
The method for preparing the lightweight fracture-resistant concrete comprises the following steps:
(1) accurately measuring each component, fully mixing the modified hollow glass microspheres and the magnesium sulfate whiskers with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight anti-bending concrete.
The materials obtained in examples and comparative examples were subjected to a performance test, and the results are shown in table 1.
TABLE 1
As can be seen from Table 1, the performances of the concrete in the examples are obviously higher than those of the comparative examples, and when the silane modified hollow glass microspheres are not added in the comparative example 1, the performances of the concrete are reduced, wherein the compressive strength and the flexural strength are obviously reduced, and the shrinkage rate and the thermal conductivity coefficient are obviously improved; in comparative example 2, magnesium sulfate crystals are not added, so that the compressive strength and the flexural strength are obviously reduced; in comparative example 3, the unsaturated polyester resin and the initiator are eliminated, so that the compressive strength and the flexural strength are obviously reduced, and the water absorption rate and the shrinkage rate are obviously improved.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution methods fall within the scope of the present invention.
Claims (7)
1. The lightweight fracture-resistant concrete is characterized in that: the paint consists of the following components: 100-160 parts of water, 150-350 parts of cement, 150-230 parts of fine aggregate, 150-200 parts of modified hollow glass microsphere, 80-120 parts of magnesium sulfate whisker, 80-100 parts of unsaturated polyester resin, 2-5 parts of initiator, 10-30 parts of foaming agent and 5-15 parts of water reducer.
2. The lightweight fracture-resistant concrete as claimed in claim 1, wherein: the modified hollow glass bead is a silane modified hollow glass bead with the diameter of 30-50 mu m.
3. The lightweight fracture-resistant concrete as claimed in claim 1, wherein: the magnesium sulfate whisker is a basic magnesium sulfate whisker, and the diameter of the magnesium sulfate whisker is 200-300 meshes.
4. the lightweight fracture-resistant concrete as claimed in claim 1, wherein: the viscosity of the unsaturated polyester resin is 0.3-0.4 Pa.S.
5. The lightweight fracture-resistant concrete as claimed in claim 1, wherein: the initiator is azodicyano valeric acid.
6. The lightweight fracture-resistant concrete as claimed in claim 1, wherein: the foaming agent is sodium dodecyl benzene sulfonate, and the water reducing agent is sodium methylene dimethyl dinaphthalene sulfonate.
7. The preparation method of the lightweight fracture-resistant concrete according to claim 1, characterized in that: the method comprises the following steps:
(1) Accurately metering each component, uniformly mixing the modified hollow glass microspheres, the magnesium sulfate whiskers and the unsaturated polyester resin, adding an initiator, and further mixing to obtain a mixture;
(2) And (2) fully mixing the mixture obtained in the step (1) with water, cement, fine aggregate, a water reducing agent and a foaming agent, and further pouring and curing to obtain the lightweight flexural concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841982.XA CN110563392A (en) | 2019-09-06 | 2019-09-06 | lightweight anti-bending concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841982.XA CN110563392A (en) | 2019-09-06 | 2019-09-06 | lightweight anti-bending concrete |
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| CN110563392A true CN110563392A (en) | 2019-12-13 |
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| CN201910841982.XA Pending CN110563392A (en) | 2019-09-06 | 2019-09-06 | lightweight anti-bending concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111848061A (en) * | 2020-05-28 | 2020-10-30 | 山西省交通科技研发有限公司 | Concrete repair dry-mixed mortar used in corrosion-freeze-thaw coupling environment and preparation method thereof |
| CN113233847A (en) * | 2021-06-24 | 2021-08-10 | 杭州申华混凝土有限公司 | Lightweight concrete and preparation method thereof |
| CN114751770A (en) * | 2022-03-23 | 2022-07-15 | 国网江苏省电力有限公司南通市通州区供电分公司 | Material for processing prefabricated foundation of ring main unit and preparation method thereof |
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| CN111848061A (en) * | 2020-05-28 | 2020-10-30 | 山西省交通科技研发有限公司 | Concrete repair dry-mixed mortar used in corrosion-freeze-thaw coupling environment and preparation method thereof |
| CN113233847A (en) * | 2021-06-24 | 2021-08-10 | 杭州申华混凝土有限公司 | Lightweight concrete and preparation method thereof |
| CN114751770A (en) * | 2022-03-23 | 2022-07-15 | 国网江苏省电力有限公司南通市通州区供电分公司 | Material for processing prefabricated foundation of ring main unit and preparation method thereof |
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Application publication date: 20191213 |