CN109928693A - A kind of cracking resistance regeneration concrete resistant to high temperature - Google Patents
A kind of cracking resistance regeneration concrete resistant to high temperature Download PDFInfo
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- CN109928693A CN109928693A CN201711345707.6A CN201711345707A CN109928693A CN 109928693 A CN109928693 A CN 109928693A CN 201711345707 A CN201711345707 A CN 201711345707A CN 109928693 A CN109928693 A CN 109928693A
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Abstract
The invention discloses a kind of cracking resistance regeneration concretes resistant to high temperature, it is made of cementitious material, coarse aggregate, fine aggregate, additive, natural river sand and water, each material weight number used is as follows in the cracking resistance regeneration concrete resistant to high temperature: 365~450 parts of cementitious material, 800~1300 parts of coarse aggregate, 70~260 parts of fine aggregate, 6~9 parts of additive, natural 450~820 parts of river sand, 100~255 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.3~0.42.A kind of cracking resistance regeneration concrete resistant to high temperature of the invention, can rationally utilize building material, improve cracking resistance regeneration concrete crack resistance resistant to high temperature, the problems such as high temperature resistance is poor in the prior art.
Description
Technical field
The present invention relates to technical field of concrete, in particular to a kind of cracking resistance regeneration concrete resistant to high temperature.
Background technique
Recycled concrete is that it is thick to be mixed to form regeneration according to a certain percentage by after the classification of discarded concrete crushing washing
Aggregate partly or entirely replaces the technology of natural aggregate concrete batching.The technology can solve discarded concrete land occupation and
The problem of processing, reduce pollution and it is energy saving.But there is certain defects for regenerated coarse aggregate, as caused by shattering process
Damage, biggish porosity remain cement base, compared with high water absorbing capacity etc..Due to these defects, cause regenerated coarse aggregate high temperature resistant,
Cracking resistance is poor, and is used for the non-structural fields such as bed course and the production greening brick of laying road more, limits its application canal
Road.
The energy co-ordination in concrete substrate of rubber, silicon powder and steel fibre, forms confounding effect, and common improvement regeneration mixes
Solidifying soil nature energy, makes it have outstanding resistance to compression, bending performance, is suitable for current all kinds of concrete works.Rubber steel fiber reinforced siliceous concrete
Regenerated coarse aggregate concrete not only has material source extensive, moreover it is possible to which the application range for expanding regenerated coarse aggregate improves resource
Efficiency is recycled, reduce environmental pollution problem.
Summary of the invention
The purpose of the present invention is to provide a kind of cracking resistance regeneration concretes resistant to high temperature, can rationally utilize building material,
Improve cracking resistance regeneration concrete crack resistance resistant to high temperature, high temperature resistance difference problem in the prior art.
To achieve the above object, the present invention provides a kind of cracking resistance regeneration concretes resistant to high temperature, by cementitious material, thick bone
Material, fine aggregate, additive, natural river sand and water form, each material weight used in the cracking resistance regeneration concrete resistant to high temperature
It is as follows to measure number:
365~450 parts of cementitious material
800~1300 parts of coarse aggregate
70~260 parts of fine aggregate
6~9 parts of additive
450~820 parts of natural river sand
100~255 parts of regenerating and modifying silicone rubber particles
Water-cement ratio 0.3~0.42.
Preferably, in above-mentioned technical proposal, the additive is made of the raw material of following parts by weight: polycarboxylic-acid diminishing
40~50 parts of agent, 8~10 parts of cellulose graft chitosan, 5~8 parts of silane coupling agent, 3~5 parts of polyvinylpyrrolidone, carbonization
3~5 parts of silicon, 3~5 parts of hollow glass micropearl, 5~8 parts of coated with silica titanium dioxide, 5~8 parts of lime, triethanolamine 2
Part, 5~8 parts of defoaming agent.
Preferably, in above-mentioned technical proposal, the defoaming agent by parts by weight be 3~5 parts fatty acid amide, 4~7 parts
Silicone emulsion, 8~10 parts of Siloxane-Oxyalkylene Copolymers and 3~5 parts of dodecyl sodium sulfate compositions.
Preferably, in above-mentioned technical proposal, the regeneration silicone rubber particles are by broken by pretreated discarded silicon rubber
100~200 parts of piece, activity CaCO is added310~15 parts, 7~10 parts of containing hydrogen silicone oil, 8~15 parts of acrylic resin, activating agent 3
~5 parts, 3~5 parts of triethanolamine, 7~10 parts of titanium complex of isostearic acid isopropyl alcohol ester are uniformly mixed, are put into de-airing mixer
150~300 parts of deionized water are added afterwards, 8~12min is stirred with 800~1200r/min, bubble removing is removed, is heated to 55~65
DEG C, 30~40min is kept, being delivered in double screw extruder after being heated, melting through effective pore size filter is 200~300 mesh
Filter filter out impurity and obtain melt, melt spues from head sheet stock hole or billot hole, and cooling, pelletizing is made；
Wherein, heating temperature is 80 DEG C~150 DEG C, and 210~250 DEG C of melting temperature, the gas vent absolute pressure of extruder is
140Pa, when pelletizing, are cut into multi-panel shape particle, and partial size is 1mm~2.5mm.
Preferably, in above-mentioned technical proposal, the cementitious material is made of the raw material of following parts by weight: cement 200~420
Part, 30~150 parts of admixture；Wherein, the admixture includes the raw material of following parts by weight: 20~80 parts of flyash, slag powders
30~90 parts, 20~50 parts of prodan.
Preferably, in above-mentioned technical proposal, the slag powders are by 20~80 parts of S95 slag powders and 10~50 parts of modification
S95 slag powders composition.
Preferably, in above-mentioned technical proposal, the modified S 95 slag with parts by weight be 43 parts new steel steel-making slag powder, 8 parts
Half water desulfurization stone and 8 parts of Carbon fibe be mixed evenly, be put into together with 61 parts of S95 slag powders concentration be 5.6 ×
10-3In the sodium dodecyl sulfate solution of mol/L, 50~60 DEG C are heated to, 28~36h is stirred to react, takes filter residue, it is dry to perseverance
It remakes.
Preferably, in above-mentioned technical proposal, the coarse aggregate is by 400~700 parts of the natural aggregate of following parts by weight, people
300~600 parts and 200~500 parts of the recycled aggregate compositions that gather materials are made, the partial size of the natural aggregate is 5~25mm, described artificial
The partial size to gather materials is 4.7~18mm, and the recycled aggregate partial size is 6~12mm.
Preferably, in above-mentioned technical proposal, the coarse aggregate is by 400~700 parts of the natural aggregate of following parts by weight, people
300~600 parts and 200~500 parts of the recycled aggregate compositions that gather materials are made, the partial size of the natural aggregate is 5~25mm, described artificial
The partial size to gather materials is 4.7~18mm, and the recycled aggregate partial size is 6~12mm.
Preferably, in above-mentioned technical proposal, the partial size of the nature river sand is 0.075~4.0mm.
Preferably, in above-mentioned technical proposal, the fine aggregate is that partial size is 2mm~4mm.
Compared with prior art, the invention has the following beneficial effects:
1, the present invention joined building wastes and the discarded silicon such as part construction waste concrete, useless brick in concrete formulation
Rubber plastic, waste concrete and useless brick are recycled, and are turned waste into wealth, are reduced costs, and have good economy and ring
Protect benefit.
2, suitable additive and regenerating and modifying silicone rubber particles are added, recycled aggregate Replacement rate is rationally selected, improve cracking resistance
Shock resistance, deformation resistance and the cracking resistance of regeneration concrete resistant to high temperature improve cracking resistance regeneration concrete resistant to high temperature
Heat-resisting quantity.
3, incorporating modified modified S 95 slag powders have increased the high intensity, high tenacity and superhigh temperature resistant of Carbon fibe newly, and
It is reacted in dodecyl sodium sulfate so that part is carbon fiber modified at charcoal dodecyl active matter, improves modified S 95 mine
The activity of ground-slag is conducive to reduce the early stage of concrete and the generation in temperature rise crack for changing its mobility when concrete, thus
Further increase the crack resistance of concrete.
Specific embodiment
Below with reference to embodiment, specific embodiments of the present invention will be described in detail, it is to be understood that of the invention
Protection scope is not limited by the specific implementation.Unless otherwise explicitly stated, otherwise in the whole instruction and right
In claim, the term " include " or its transformations will be understood as be include stated element or
Component part, and do not exclude other elements or other components.
Mix-design:
Cracking resistance of the invention regeneration concrete resistant to high temperature is made of the raw material of following parts by weight:
365~450 parts of cementitious material, 800~1300 parts of coarse aggregate, 70~260 parts of fine aggregate, 6~9 parts of additive, from
Right 450~820 parts of river sand, 100~255 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.3~0.42.
The sorting table of concrete raw material of the invention:
The sorting table of 1 concrete raw material of table
Wherein,
1. the preparation of defoaming agent:
Fatty acid amide that defoaming agent is 3~5 parts by parts by weight, 4~7 parts of silicone emulsions, 8~10 parts it is polyether-modified poly-
Siloxanes and 3~5 parts of dodecyl sodium sulfate compositions.
The preparation method of defoaming agent: first fatty acid amide, Siloxane-Oxyalkylene Copolymers and dodecyl sodium sulfate are mixed
Uniformly, 1.5~2 times of ionized water is added and stirs 3~5min addition silicone emulsion, 2~3min of stirring is made used in the present invention
Defoaming agent.
2. the preparation of additive:
Additive is made of the raw material of following parts by weight: 40~50 parts of poly carboxylic acid series water reducer, cellulose graft shell is poly-
8~10 parts of sugar, 5~8 parts of silane coupling agent, 3~5 parts of polyvinylpyrrolidone, 3~5 parts of silicon carbide, hollow glass micropearl 3~5
Part, 5~8 parts of coated with silica titanium dioxide, 5~8 parts of lime, 2 parts of triethanolamine, 5~8 parts of defoaming agent.
The preparation method of additive is: by powdered cellulose graft chitosan, silane coupling agent, polyvinylpyrrolidine
Ketone, silicon carbide, hollow glass micropearl, coated with silica titanium dioxide and lime part are uniformly mixed, and package spare, as coagulation
Native additive solid component, poly carboxylic acid series water reducer, triethanolamine and defoaming agent are individually packed；
3. the preparation of grain regenerating and modifying silicone rubber particles:
Regeneration silicone rubber particles are that activity is added by passing through pretreated 100~200 parts of discarded silicon rubber fragment
CaCO310~15 parts, 7~10 parts of containing hydrogen silicone oil, 8~15 parts of acrylic resin, 3~5 parts of activating agent, 3~5 parts of triethanolamine,
It 7~10 parts of titanium complex of isostearic acid isopropyl alcohol ester, is uniformly mixed, deionized water 150~300 is added after being put into de-airing mixer
Part, 8~12min is stirred with 800~1200r/min, removes bubble removing, is heated to 55~65 DEG C, 30~40min is kept, is delivered to
Impurity is filtered out by the filter that effective pore size filter is 200~300 mesh after being heated, melting in double screw extruder to be melted
Body, melt spue from head sheet stock hole or billot hole, and cooling, pelletizing is made；
Wherein, heating temperature is 80 DEG C~150 DEG C, and 210~250 DEG C of melting temperature, the gas vent absolute pressure of extruder is
140Pa, when pelletizing, are cut into multi-panel shape particle, and partial size is 1mm~2.5mm.
Silicon rubber is uniformly mixed with containing hydrogen silicone oil, acrylic resin, activating agent and triethanolamine, it is different in isostearic acid
It under the emulsification of propyl alcohol ester titanium complex, is formed using water as dispersed phase, liquid silicone rubber is the lotion point of continuous phase
Scattered mode, dispersion size is small, using heating, solidifying, dehydration under vacuum state, so that modified silicon rubber has sponge
Characteristic, but due to active CaCO3The viscosity of itself and the acrylic resin of thermoplastic have preferable physical mechanical property, resistance to
Hou Xing, chemical-resistant and excellent water resistance to improve silicon rubber fragment plastic density, while improving tensile strength, improve
Rigidity, stiffness, and then improve impact resistance and toughness, thus using modified silicon rubber as concrete materials in use, it is uniform
The abscess of dispersion, the characteristics of aperture is small, density is controllable and damping, shock resistance, heat-barrier material, and thin regeneration silicone rubber particles
Incorporation reduce the intercommunicating pore in mortar, thereby reduce the evaporation of moisture in mortar, reduce shrinkage stress, be conducive to mention
High material impact strength, heatproof intensity and cracking resistance.
4. the preparation of modified S 95 slag powders
It is that 43 parts of new steel steel-making slag powder, 8 parts of half water desulfurization stone and 8 parts of Carbon fibe are mixed with parts by weight
Even, it is 5.6 × 10 that concentration is put into together with 61 parts of S95 slag powders-3In the sodium dodecyl sulfate solution of mol/L, heating
To 50~60 DEG C, it is stirred to react 28~36h, takes filter residue, it is dry to constant weight, modified S 95 slag powders are made.
Using new steel steel slag part, the modifying agent of half water desulfurization stone and Carbon fibe as S95 slag powders, exist to S95 slag powders
It is modified in sodium dodecyl sulfate solution, modified S95 slag powders have increased the high intensity of Carbon fibe, high tenacity and resistance to newly
Superelevation warm nature, and react in dodecyl sodium sulfate so that part is carbon fiber modified at charcoal dodecyl active matter, it mentions
The activity of modified S 95 slag powders is risen, rubber powder is thinner, and mixed and modified S95 slag powders and naturally husky average grain diameter are smaller, then
Bigger with the draw ratio of mixed sand, draw ratio is bigger, and the globality of concrete is better, and concrete tensile strength also increases accordingly,
Thus the anti-early-age crack ability of concrete improves, and modified S 95 slag powders are used to change its mobility when concrete and be conducive to
The early stage of concrete and the generation in temperature rise crack are reduced, to further increase the crack resistance of concrete.
4 embodiment description of test of cracking resistance of the invention regeneration concrete resistant to high temperature point, while for used in more preferable verifying
It is reasonable using building material by designing suitable raw material proportioning, it is mixed that verifying improves the regeneration resistant to high temperature of cracking resistance in the prior art
The problem of solidifying soil impact strength, heatproof intensity and cracking resistance difference.
Embodiment 1
Concrete formulation is as follows: 384 parts of cementitious material, 1022 parts of coarse aggregate, 74 parts of fine aggregate, 6.2 parts of additive, natural
458 parts of river sand, 125 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.32.Wherein, 234 parts of cement, flyash in cementitious material
37 parts, 44 parts of S95 slag powders, prodan 36 and 33 parts of modified S 95 slag powders；352 parts of artificial aggregate in coarse aggregate, naturally
Rubble 421, recycled aggregate 249.
Preparation method is: will first mix cementitious material and water, and add additive after uniform, and add after stirring 32s
Enter artificial aggregate, natural rubble, recycled aggregate, then stirs 20min.
Embodiment 2
Concrete formulation is as follows: 389 parts of cementitious material, 986 parts of coarse aggregate, 86 parts of fine aggregate, 6.5 parts of additive, natural
534 parts of river sand, 162 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.34.Wherein, 254 parts of cement, flyash in cementitious material
54 parts, 46 parts of S95 slag powders, prodan 35 and 25 parts of modified S 95 slag powders；352 parts of artificial aggregate in coarse aggregate, naturally
Rubble 421, recycled aggregate 249.
Preparation method is: will first mix cementitious material and water, and add additive after uniform, and add after stirring 25s
Enter artificial aggregate, natural rubble, recycled aggregate, then stirs 32min.
Embodiment 3
Concrete formulation is as follows: 408 parts of cementitious material, 1204 parts of coarse aggregate, 95 parts of fine aggregate, 6.8 parts of additive, natural
631 parts of river sand, 175 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.37.Wherein, 254 parts of cement, flyash in cementitious material
38 parts, 48 parts of S95 slag powders, prodan 37 and 31 parts of modified S 95 slag powders；352 parts of artificial aggregate in coarse aggregate, naturally
Rubble 421, recycled aggregate 249.
Preparation method is: will first mix cementitious material and water, and add additive after uniform, and add after stirring 40s
Enter artificial aggregate, natural rubble, recycled aggregate, then stirs 25min.
Embodiment 4
Concrete formulation is as follows: 423 parts of cementitious material, 1287 parts of coarse aggregate, and 235 parts of fine aggregate, 7.0 parts of additive, from
Right 785 parts of river sand, 206 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.41.Wherein, 304 parts of cement, fine coal in cementitious material
22 parts of ash, 30 parts of S95 slag powders, prodan 25 and 42 parts of modified S 95 slag powders；321 parts of artificial aggregate, day in coarse aggregate
Right 612 parts of rubble, 354 parts of recycled aggregate.
Preparation method is: will first mix cementitious material and water, and add additive after uniform, and add after stirring 60s
Enter artificial aggregate, natural rubble, recycled aggregate, then stirs 10min.
Embodiment 5
Concrete formulation is as follows: 374 parts of cementitious material, 986 parts of coarse aggregate, 148 parts of fine aggregate, 7.0 parts of additive, natural
506 parts of river sand, 235 parts of regenerating and modifying silicone rubber particles, water-cement ratio 0.42.Wherein, 245 parts of cement, flyash in cementitious material
45 parts, 36 parts of S95 slag powders and 48 parts of modified S 95 slag powders；321 parts of artificial aggregate in coarse aggregate, 612 parts of natural rubble,
354 parts of recycled aggregate.
Preparation method is: will first mix cementitious material and water, and add additive after uniform, and add after stirring 76s
Enter artificial aggregate, natural rubble, recycled aggregate, then stirs 12min.
To using manufacturing experimently with when preparation method than embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5
Each 10 pieces of progress combination property analysis of style:
The combination property analysis of 2 comparative example 1 of table, embodiment 2, embodiment 3, embodiment 4 and embodiment 5
From embodiment 1, embodiment 2, embodiment 3, embodiment 4 and the embodiment 5 in table 2, in 5 kinds of differences of the invention
In concrete, concrete of the invention is obtained, compared with normal concrete, by China " concrete admixture standard GB8076-
1997 " it is detected with " concrete for hydraulic structure testing regulations ", mean intensity is (29.1+28.6+ when intensity of the invention (MPa) 7d
Mean compressive strength ratio (%) is when mean intensity is 35.68MPa, 7d when 28.3+27.6+27.3)/5=28.18MPa, 28d
103.4%, mass loss rate ratio when 28d mean compressive strength ratio (%) is 105.78,200 DEG C, 400 DEG C, 600 DEG C, 800 DEG C
(%) is respectively 0.56,2.21,3.17,6.57, and everyway is higher than standard, the various performance parameters of concrete of the invention
It is excellent.
Further, using embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5 with when preparation method
Each 5 pieces of style of trial-production, treadmill test sample dimensions 600mm × 600mm × 63mm.Test specimen is covered with plastic film immediately after pouring
Lid, keeping environment temperature is (20 ± 2) DEG C, is removed plastic film after relative humidity (60 ± 5) %, 2h, with wind speed 4.5m/s
Electric fan blows mortar surface.Record test specimen cracking time, crack quantity, fracture length and width.Since pouring, record is extremely
36h, according to record as a result, evaluating test specimen crack resistance, such as table 3.
3 test specimen crack resistance assay table of table
It being shown from the test result of table 3, the time in appearance crack of the invention is average, and in 7.18h, distress in concrete is tiny,
Only 0.234mm, naked eyes are all difficult to see that.Average area of cracks is 1.19mm2/ root, the slit number of per unit
For 5.636/m2, total area of cracks on per unit is 7.566mm2/m2, crack resistance opinion rating is 1 grade, table
The cracking resistance of bright concrete of the invention is significant.
In conclusion the present invention joined the building wastes such as part construction waste concrete, useless brick in concrete formulation
With discarded silicon rubber plastics, waste concrete and useless brick are recycled, and are turned waste into wealth, are reduced costs, and are had good
Economical and environmentally friendly benefit.Suitable additive and regenerating and modifying silicone rubber particles are added, recycled aggregate Replacement rate is rationally selected, is improved
Shock resistance, deformation resistance and the cracking resistance of cracking resistance regeneration concrete resistant to high temperature improve cracking resistance regeneration coagulation resistant to high temperature
The heat-resisting quantity of soil.Incorporating modified modified S 95 slag powders have increased the high intensity, high tenacity and superhigh temperature resistant of Carbon fibe newly,
And reacted in dodecyl sodium sulfate so that part is carbon fiber modified at charcoal dodecyl active matter, improve modification
The activity of S95 slag powders is conducive to reduce the early stage of concrete and the generation in temperature rise crack for changing its mobility when concrete,
To further increase the crack resistance of concrete.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of cracking resistance regeneration concrete resistant to high temperature, which is characterized in that by cementitious material, coarse aggregate, fine aggregate, additive,
Natural river sand and water form, and each material weight number used is as follows in the cracking resistance regeneration concrete resistant to high temperature:
365~450 parts of cementitious material
800~1300 parts of coarse aggregate
70~260 parts of fine aggregate
6~9 parts of additive
450~820 parts of natural river sand
100~255 parts of regenerating and modifying silicone rubber particles
Water-cement ratio 0.3~0.42.
2. cracking resistance regeneration concrete resistant to high temperature according to claim 1, which is characterized in that the additive is by following heavy
The raw material for measuring number forms: 40~50 parts of poly carboxylic acid series water reducer, 8~10 parts of cellulose graft chitosan, silane coupling agent 5~
8 parts, 3~5 parts of polyvinylpyrrolidone, 3~5 parts of silicon carbide, 3~5 parts of hollow glass micropearl, coated with silica titanium dioxide
5~8 parts, 5~8 parts of lime, 2 parts of triethanolamine, 5~8 parts of defoaming agent.
3. cracking resistance regeneration concrete resistant to high temperature according to claim 2, which is characterized in that the defoaming agent is by parts by weight
Fatty acid amide, 4~7 parts of silicone emulsions, 8~10 parts of Siloxane-Oxyalkylene Copolymers and 3~5 parts of dodecanes that number is 3~5 parts
Base sodium sulfonate composition.
4. cracking resistance regeneration concrete resistant to high temperature according to claim 1, which is characterized in that the regeneration silicone rubber particles
It is that activity CaCO is added by passing through pretreated 100~200 parts of discarded silicon rubber fragment310~15 parts, containing hydrogen silicone oil 7~10
Part, 8~15 parts of acrylic resin, 3~5 parts of activating agent, 3~5 parts of triethanolamine, isostearic acid isopropyl alcohol ester titanium complex 7~
10 parts, be uniformly mixed, be put into after de-airing mixer and be added 150~300 parts of deionized water, with 800~1200r/min stirring 8~
12min removes bubble removing, is heated to 55~65 DEG C, keeps 30~40min, is delivered in double screw extruder logical after being heated, melting
It crosses the filter that effective pore size filter is 200~300 mesh to filter out impurity and obtain melt, melt is spat from head sheet stock hole or billot hole
Out, cooling, pelletizing is made.
5. cracking resistance regeneration concrete resistant to high temperature according to claim 1, which is characterized in that the cementitious material is by following
The raw material of parts by weight forms: 200~420 parts of cement, 30~150 parts of admixture；Wherein, the admixture includes following parts by weight
Raw material: 20~80 parts of flyash, 30~90 parts of slag powders, 20~50 parts of prodan.
6. cracking resistance regeneration concrete resistant to high temperature according to claim 4, which is characterized in that the slag powders are by 20~80
The S95 slag powders of part and 10~50 parts of modified S 95 slag powders composition.
7. cracking resistance regeneration concrete resistant to high temperature according to claim 5, which is characterized in that the modified S 95 slag with
Parts by weight are that 43 parts of new steel steel-making slag powder, 8 parts of half water desulfurization stone and 8 parts of Carbon fibe are mixed evenly, with 61 parts
It is 5.6 × 10 that S95 slag powders are put into concentration together-3In the sodium dodecyl sulfate solution of mol/L, 50~60 DEG C are heated to,
It is stirred to react 28~36h, takes filter residue, it is dry obtained to constant weight.
8. concrete according to claim 1, characterized in that the coarse aggregate by following parts by weight natural aggregate
400~700 parts, 300~600 parts of artificial aggregate and 200~500 parts of recycled aggregate compositions, the partial size of the natural aggregate is 5~
25mm, the partial size of the artificial aggregate are 4.7~18mm, and the recycled aggregate partial size is 6~12mm.
9. concrete according to claim 1, characterized in that the partial size of the nature river sand is 0.075~4.0mm.
10. concrete according to claim 1, characterized in that the fine aggregate is that partial size is 2mm~4mm.
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| CN113060979A (en) * | 2021-03-26 | 2021-07-02 | 上海宝田新型建材有限公司 | Corrosion-resistant high-strength cementing material prepared by modifying steelmaking wastes |
| CN114773791A (en) * | 2022-04-29 | 2022-07-22 | 湖北工业大学 | Self-monitoring type concrete repair material and preparation and application methods thereof |
| CN114773791B (en) * | 2022-04-29 | 2023-07-21 | 湖北工业大学 | Self-monitoring type repairing material for concrete and preparation and application methods thereof |
| CN116354679A (en) * | 2023-06-02 | 2023-06-30 | 石家庄铁道大学 | Strain hardening type recycled coarse aggregate concrete and preparation method thereof |
| CN116354679B (en) * | 2023-06-02 | 2023-07-25 | 石家庄铁道大学 | Strain hardening type recycled coarse aggregate concrete and preparation method thereof |
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