CN103121814B - Lightweight concrete and preparation method and applications thereof - Google Patents

Lightweight concrete and preparation method and applications thereof Download PDF

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Publication number
CN103121814B
CN103121814B CN201310057101.8A CN201310057101A CN103121814B CN 103121814 B CN103121814 B CN 103121814B CN 201310057101 A CN201310057101 A CN 201310057101A CN 103121814 B CN103121814 B CN 103121814B
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parts
water
cement
concrete
polymer emulsion
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CN201310057101.8A
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CN103121814A (en
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董健苗
吴辉琴
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广西工学院
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Abstract

The invention discloses a lightweight concrete and a preparation method and applications thereof. The lightweight concrete is composed of raw materials such as cement, industrial waste residues, lightweight aggregates, a water reducing agent, water, an exciting agent and a polymer emulsion. The preparation method comprises the steps of carrying out surface treatment, mixing and stirring and the like on the raw materials. The lightweight concrete prepared by using the method disclosed by the invention can be used for being prepared into lightweight concrete blocks, because lightweight aggregates subjected to surface treatment and industrial waste residues subjected to activation are adopted in the production process of the lightweight concrete disclosed by the invention, and a specific polymer emulsion composed of a curing agent and resins is added, lightweight concrete blocks have the advantages of high strength and high toughness, and the weights of the lightweight concrete blocks are also reduced. In addition, the lightweight concrete disclosed by the invention also has the advantages of simple preparation method, convenience for operation, easiness for promotion and application.

Description

A kind of light weight concrete and preparation method thereof and application
Technical field
The present invention relates to a kind of light weight concrete and preparation method thereof and application.
Background technology
The normal concrete using in construction market at present and concrete segment ubiquity are from the defect such as great, folding strength is low, poor toughness, heat insulation effect are poor; Some lightweight concrete building blocks, as air-entrained concrete building block, to exist ultimate compression strength low, folding strength is lower, the defects such as poor toughness, their crimping is than (or splitting pressure ratio) all can not the be up to state standards requirement of the unified technical specifications > > of < < materials for wall application (GB50574-2010).
In the concrete and concrete segment of selling on market now, there are no the product that has added polymer emulsion, and in existing disclosed patent, there are the polyvinyl acetate of employing and polyacrylic ester as polymer emulsion, to make the report of concrete segment, it is destroyed that but polyvinyl acetate is easy under strong alkali environment, unstable, and cement based is the material that alkalescence is very strong, so should not adopt polyvinyl acetate as cement-based material, although another kind of polymer emulsion polyacrylic ester can form good luster and water-fast film, have bonding firm, incrust, at room temperature pliable and tough and flexible, the advantage of good weatherability, but its tensile strength is not high, still can not meet user to the high-tensile requirement of concrete segment.
The application is mainly by changing the proportioning of concrete material, aglite is carried out to surface modification, particularly added the polymer emulsion of new composition, reduced concrete gravity, improve by a relatively large margin anti-folding and the ultimate compression strength of concrete and concrete segment, make concrete segment meet the requirement of doubling pressure ratio in standard (GB50574-2010).
Summary of the invention
The technical problem to be solved in the present invention is: provide that a kind of intensity is higher, toughness is better, lightweight light weight concrete and preparation method thereof and application.
The technical scheme solving the problems of the technologies described above is: a kind of light weight concrete, it is comprised of following raw material, be by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~37 part of aglite, 0.3~0.8 part of polymer emulsion.
Described industrial residue is flyash and slag powders; Described water reducer is naphthalene water reducer; Described exciting agent is water glass or sodium sulfate; Described aglite is granular polystyrene or haydite, and described polymer emulsion is by solidifying agent and resin by weight for 1:4 takes and mixes, and described solidifying agent is T-31 solidifying agent, and described resin is epoxy resin.
Further technical scheme of the present invention is: a kind of light weight concrete, it is comprised of following raw material, be by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~3 part of granular polystyrene, 0.3~0.8 part of polymer emulsion.
Further technical scheme of the present invention is: a kind of light weight concrete, and it is comprised of following raw material, is by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 10~37 parts of haydites, 0.3~0.8 part of polymer emulsion.
Another technical scheme of the present invention is: a kind of preparation method of light weight concrete, comprises the steps:
A. take by ratio of weight and the number of copies 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~37 part of aglite, 0.3~0.8 part of polymer emulsion;
B. the aglite taking in steps A is carried out to surface treatment;
C. the polymer emulsion taking in steps A, exciting agent, water reducer dispersing and dissolving are obtained to mixture I in water, in mixture I, pour surface-treated aglite in cement, industrial residue and the step B taking in steps A into, stir and obtain a kind of light weight concrete;
Wherein, described industrial residue is flyash and slag powders; Described water reducer is naphthalene water reducer; Described exciting agent is water glass or sodium sulfate; Described aglite is granular polystyrene or haydite, and described polymer emulsion is by solidifying agent and resin by weight for 1:4 takes and mixes, and described solidifying agent is T-31 solidifying agent, and described resin is epoxy resin.
Described aglite is granular polystyrene, the concrete operation step of step B is: with the trolamine trolamine aqueous solution that obtains soluble in water of granular polystyrene quality 6%, the trolamine aqueous solution is sprayed to granular polystyrene surface uniformly, add again and granular polystyrene can be wrapped up to cement completely, stir, complete and make shell; Wherein, the consumption of preparing the required water of the trolamine aqueous solution is for can be completely moistening by granular polystyrene surface.
Described aglite is haydite, and the concrete operation step of step B is: the cement paste that is 0.4 by haydite and water cement ratio stirs, and completes and makes shell, and the consumption of described cement paste is for wrapping up haydite completely.
In described steps A, take by ratio of weight and the number of copies 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~3 part of granular polystyrene, 0.3~0.8 part of polymer emulsion.
In described steps A, take by ratio of weight and the number of copies 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 10~37 parts of haydites, 0.3~0.8 part of polymer emulsion.
Another technical scheme of the present invention is: a kind of application of light weight concrete, this concrete is for the preparation of lightweight concrete building block.
Owing to adopting technique scheme, a kind of light weight concrete of the present invention and preparation method thereof and application have following beneficial effect:
1. intensity is high, toughness is high:
Aglite and polymer emulsion in the concrete that the present invention is prepared into and concrete segment, have been added, in preparation method of the present invention, aglite is carried out to surface modification, to improve the interfacial adhesion between itself and cement, the concrete being prepared into the present invention is prepared into concrete segment, and intensity is high; And the exciting agent adding in the present invention has the effect of stimulating activity to industrial residue, also improved the intensity of concrete segment; In the stirring moulding process of concrete segment, added polymer emulsion, for improving folding strength and the ultimate compression strength of concrete segment, improved the crimping ratio of concrete segment, improved the toughness of concrete segment, thereby be conducive to improve structural seismic performance.
The experiment proved that: aglite, after surface modification, is compared with check sample, concrete and concrete segment ultimate compression strength improve can reach 20~60%, and folding strength improves can reach 20~40%; Add after polymer emulsion, concrete segment folding strength raising 50~60%, ultimate compression strength can improve 20~40%.
2. lightweight:
The present invention is on the basis of normal concrete and concrete segment, with surface treated aglite, replaces the stone (coarse aggregate) in concrete, has alleviated the weight of concrete and concrete segment, and its dry apparent density is at 1000 ~ 1300 kg/m 3left and right, thus the especially deadweight of Highrise buildings of buildings reduced, reduce building cost.
3. good heat insulating:
Concrete of the present invention and concrete segment are owing to adding surface treated aglite, and its heat-insulating property is significantly improved than normal concrete and concrete segment, thereby is conducive to building energy conservation.
4. preparation method of the present invention is simple, easy to operate, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1: the preparation method's of a kind of light weight concrete of the embodiment of the present invention one process flow sheet.
Fig. 2: the preparation method's of a kind of light weight concrete of the embodiment of the present invention seven process flow sheet.
embodiment:
Embodiment mono-:
A kind of light weight concrete, it is comprised of following raw material, be by ratio of weight and the number of copies: 50 parts of cement, 25 parts, flyash, 25 parts of slag powders, 2 parts of naphthalene water reducers, 4 parts, sodium sulfate, 40 parts, water, 0.8 part of granular polystyrene, 0.3 part of polymer emulsion, described polymer emulsion by T-31 solidifying agent and epoxy resin by weight taking and mix for 1:4; This concrete preparation method comprises the following steps:
A. by proportioning, take cement, flyash, slag powders, naphthalene water reducer, sodium sulfate, water, granular polystyrene, polymer emulsion;
B. the granular polystyrene taking in steps A is carried out to surface treatment: with the trolamine trolamine aqueous solution that obtains soluble in water of granular polystyrene quality 6%, with watering can, the trolamine aqueous solution is sprayed to granular polystyrene surface uniformly, add again and granular polystyrene can be wrapped up to cement completely, stir, complete and make shell; Wherein, the consumption of preparing the required water of the trolamine aqueous solution is for can be completely moistening by granular polystyrene surface;
C. the polymer emulsion taking in steps A, water glass, naphthalene water reducer dispersing and dissolving are obtained to mixture I in water, in mixture I, pour surface-treated granular polystyrene in cement, flyash, slag powders and the step B taking in steps A into, stir and obtain a kind of light weight concrete.
Embodiment bis-~embodiment six: a kind of light weight concrete, raw material and the parts by weight of this light weight concrete refer to table one, and its preparation method is identical with embodiment mono-.
Table one:
Embodiment seven:
A kind of light weight concrete, it is comprised of following raw material, be by ratio of weight and the number of copies: 50 parts of cement, 25 parts of slag powders, 25 parts, flyash, 40 parts, water, 2 parts of naphthalene water reducers, 4 parts of water glass, 10 parts of haydites, 0.3 part of polymer emulsion, described polymer emulsion by T-31 solidifying agent and epoxy resin by weight taking and mix for 1:4; This concrete preparation method comprises the following steps:
A. by proportioning, take cement, slag powders, flyash, water, naphthalene water reducer, water glass, haydite, polymer emulsion;
B. the haydite taking in steps A is carried out to surface treatment: the cement paste that is 0.4 by haydite and water cement ratio stirs, and completes and makes shell, and the consumption of described cement paste is for wrapping up haydite completely;
C. the polymer emulsion taking in steps A, water glass, naphthalene water reducer dispersing and dissolving are obtained to mixture I in water, in mixture I, pour surface-treated haydite in cement, slag powders, flyash and the step B taking in steps A into, stir and obtain a kind of light weight concrete.
Embodiment eight~embodiment 12: a kind of light weight concrete, raw material and the parts by weight of this light weight concrete refer to table two, and its preparation method is identical with embodiment seven.
Table two:
Embodiment 13: the application of a kind of light weight concrete of the present invention, and the light weight concrete being prepared into the present invention is prepared into lightweight concrete building block, and the preparation method of this lightweight concrete building block comprises the steps:
D. light weight concrete the present invention being prepared is poured in mould (being of a size of 240 * 115 * 53mm), vibratory compaction;
E.24 hour after, step D is carried out to the demoulding;
F. the lightweight concrete building block after the demoulding obtaining in step e being positioned over to temperature is 20 ± 2 ℃, and humidity is in more than 95% standard curing room, to carry out maintenance, and maintenance 28 days obtains the concrete segment of high-strength light high tenacity.
The ultimate compression strength of the lightweight concrete building block that the present invention makes is that 3.5~10MPa, folding strength are about 0. 5 ~ 2.0 MPa left and right.
As a kind of conversion of embodiment 13, light weight concrete of the present invention can also be for the preparation of lightweight insulating concrete plate.

Claims (3)

1. a light weight concrete, it is characterized in that: it is comprised of following raw material, be by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~37 part of aglite, 0.3~0.8 part of polymer emulsion, wherein, described industrial residue is flyash and slag powders; Described water reducer is naphthalene water reducer; Described exciting agent is water glass or sodium sulfate; Described aglite is granular polystyrene or haydite, and described polymer emulsion is by solidifying agent and resin by weight for 1:4 takes and mixes, and described solidifying agent is T-31 solidifying agent, and described resin is epoxy resin; This light weight concrete is prepared from by following method:
A. take by ratio of weight and the number of copies 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~37 part of aglite, 0.3~0.8 part of polymer emulsion;
B. the aglite taking in steps A is carried out to surface treatment:
When described aglite is granular polystyrene, the trolamine trolamine aqueous solution that obtains soluble in water by granular polystyrene quality 6%, is sprayed at granular polystyrene surface uniformly by the trolamine aqueous solution, then adds and granular polystyrene can be wrapped up to cement completely, stir, complete and make shell; Wherein, the consumption of preparing the required water of the trolamine aqueous solution is for can be completely moistening by granular polystyrene surface;
When described aglite is haydite, the concrete operation step of step B is: the cement paste that is 0.4 by haydite and water cement ratio stirs, and completes and makes shell, and the consumption of described cement paste is for wrapping up haydite completely;
C. the polymer emulsion taking in steps A, exciting agent, water reducer dispersing and dissolving are obtained to mixture I in water, in mixture I, pour surface-treated aglite in cement, industrial residue and the step B taking in steps A into, stir and obtain a kind of light weight concrete.
2. a kind of light weight concrete according to claim 1, it is characterized in that: it is comprised of following raw material, be by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 0.8~3 part of granular polystyrene, 0.3~0.8 part of polymer emulsion.
3. a kind of light weight concrete according to claim 1, it is characterized in that: it is comprised of following raw material, be by ratio of weight and the number of copies: 50~70 parts of cement, 30~50 parts of industrial residues, 2~5 parts of water reducers, 0.9~4 part of exciting agent, 40~50 parts, water, 10~37 parts of haydites, 0.3~0.8 part of polymer emulsion.
CN201310057101.8A 2013-02-22 2013-02-22 Lightweight concrete and preparation method and applications thereof CN103121814B (en)

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CN102659369A (en) * 2012-05-18 2012-09-12 山西省交通科学研究院 Epoxy emulsion modified quick repair mortar for concrete roads and bridges and preparation method for mortar

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Publication number Priority date Publication date Assignee Title
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CN1530501A (en) * 2003-03-10 2004-09-22 张英保 Light cast-in-situs concrete wallboard
CN102659369A (en) * 2012-05-18 2012-09-12 山西省交通科学研究院 Epoxy emulsion modified quick repair mortar for concrete roads and bridges and preparation method for mortar

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