CN109354462A - recycled concrete - Google Patents
recycled concrete Download PDFInfo
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- CN109354462A CN109354462A CN201811459348.1A CN201811459348A CN109354462A CN 109354462 A CN109354462 A CN 109354462A CN 201811459348 A CN201811459348 A CN 201811459348A CN 109354462 A CN109354462 A CN 109354462A
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- regeneration concrete
- regenerated
- concrete
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- 239000004567 concrete Substances 0.000 title claims abstract description 159
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 39
- 239000011398 Portland cement Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 238000002425 crystallisation Methods 0.000 claims abstract description 22
- 230000008025 crystallization Effects 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 230000035515 penetration Effects 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 20
- 230000008929 regeneration Effects 0.000 claims description 128
- 238000011069 regeneration method Methods 0.000 claims description 128
- 229920000126 latex Polymers 0.000 claims description 30
- 229910021487 silica fume Inorganic materials 0.000 claims description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 238000004078 waterproofing Methods 0.000 claims description 24
- 239000010881 fly ash Substances 0.000 claims description 23
- 239000004575 stone Substances 0.000 claims description 21
- 206010024796 Logorrhoea Diseases 0.000 claims description 19
- 239000011449 brick Substances 0.000 claims description 19
- 235000019353 potassium silicate Nutrition 0.000 claims description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000012745 toughening agent Substances 0.000 claims description 9
- 239000004566 building material Substances 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000839 emulsion Substances 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000012466 permeate Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 31
- 238000000465 moulding Methods 0.000 description 24
- 230000000740 bleeding effect Effects 0.000 description 23
- 238000003756 stirring Methods 0.000 description 23
- 230000006835 compression Effects 0.000 description 22
- 238000007906 compression Methods 0.000 description 22
- 238000005336 cracking Methods 0.000 description 17
- 239000004568 cement Substances 0.000 description 16
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 15
- 238000002955 isolation Methods 0.000 description 10
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 10
- 230000002708 enhancing effect Effects 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000004819 silanols Chemical class 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of building materials, and provides recycled concrete aiming at the problem of weak durability of recycled aggregate, which comprises the following components in parts by weight: 4.5-6 parts of water; 15-20 parts of Portland cement; 1.5-2 parts of a water reducing agent; 60-80 parts of regenerated coarse aggregate, wherein the regenerated coarse aggregate is a mixture of broken masonry, waste concrete blocks and natural aggregate; 37.5-50 parts of regenerated fine aggregate, wherein the regenerated fine aggregate is a mixture of medium sand and industrial waste residues; 1.5-2 parts of CM-DPS deep penetration crystallization sealing waterproof agent; 10.5-14 parts of rubber emulsion; 3-4 parts of a silane coupling agent. The CM-DPS deep penetration crystallization sealing waterproof agent is added, so that the hardness and compactness of the regenerated coarse aggregate and the regenerated fine aggregate are favorably enhanced, the waterproof agent permeates into cracks of the regenerated coarse aggregate and the regenerated fine aggregate, the crack strength of the regenerated coarse aggregate and the regenerated fine aggregate is favorably strengthened, the durability of the regenerated concrete is favorably enhanced, and the compressive strength of the regenerated concrete is strengthened.
Description
Technical field
The present invention relates to the field of building materials, more specifically, it relates to a kind of regeneration concrete.
Background technique
Regeneration concrete refers to discarded concrete block after broken, cleaning, classification, is compounded by a certain percentage with grade
It closes, partly or entirely replaces the natural aggregates such as sandstone, add the novel concrete that cement, water etc. are formulated.
But due to waste and old concrete in shattering process by biggish external force, gathering materials, inside is easy to appear
A large amount of fine slight cracks, cause the porosity of regenerated aggregate to increase, so that regenerated aggregate is easy during mixing
Water suction so that the water absorption rate and rate of water absorption of regenerated aggregate increase, and then leads to the apparent density of regenerated aggregate and accumulates close
Degree reduces, so that the endurance quality of regeneration concrete dies down, still there is improved space.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of regeneration concrete, having is reduced again
The advantages of giving birth to the water absorption rate to gather materials, the endurance quality for enhancing regeneration concrete, being not easily susceptible to cracking.
To achieve the above object, the present invention provides the following technical scheme that
A kind of regeneration concrete, the component including following mass fraction:
4.5-6 parts of water；
15-20 parts of portland cement；
1.5-2 parts of water-reducing agent；
60-80 parts of recycled coarse aggregate, the recycled coarse aggregate is the mixture of garrulous bricks and stones, waste concrete block, natural aggregate；
37.5-50 parts of recycled fine aggregate, the recycled fine aggregate is the mixture of middle sand and industrial residue；
Waterproofing agent 1.5-2 parts of sealing of the crystallization of CM-DPS depth of penetration；
10.5-14 parts of rubber latex；
3-4 parts of silane coupling agent.
By adopting the above technical scheme, by the way that CM-DPS depth of penetration crystallization sealing waterproofing agent is added, be conducive to enhancing regeneration
The hardness and compactness of coarse aggregate and recycled fine aggregate, waterproofing agent penetrate into splitting to recycled coarse aggregate and recycled fine aggregate
In seam, be conducive to the intensity of reinforcement recycled coarse aggregate and recycled fine aggregate, so that recycled coarse aggregate and regeneration
The apparent density of fine aggregate improves, and then is conducive to enhance the endurance quality of regeneration concrete, so that the resistance to compression of regeneration concrete
Enhanced strength, so that being not easily susceptible to cracking after regeneration concrete molding；Meanwhile CM-DPS depth of penetration crystallization sealing waterproofing agent is nothing
Color, tasteless, nontoxic green product are conducive to the environmental-protecting performance for improving regeneration concrete；By the way that rubber latex is added, have
Conducive to the toughness of enhancing regeneration concrete, so that the compression strength of regeneration concrete enhances, so that after regeneration concrete molding not
It is easy cracking；By addition silane coupling agent, be conducive to improve the compatibility of the organic matter and inorganic filler in regeneration concrete,
So that rubber latex is dispersed more uniform in regeneration concrete, preferably play a role to be conducive to rubber latex, together
When the bleeding rate of regeneration concrete is reduced so that regeneration concrete be not easy to occur during being stirred bleeding or
The phenomenon that isolation；Meanwhile silane coupling agent need to first hydrolyze to form silanol in coupling process, meanwhile, portland cement surface can
Can absorbed portion water, form silicone hydroxyl, the polarity of the silanol hydrolyzed to form due to silane coupling agent is extremely strong, hydrogen easy to form
Key, therefore, the hydroxyl on different silanols are easy mutual dehydrating condensation, meanwhile, the hydroxyl on silanol is also easy to and silicate cement
The silicone hydroxyl dehydrating condensation on mud surface, and silane coupling agent is coupled with rubber latex simultaneously, thus be conducive to the extension of strand,
Be conducive to the formation of cross-linked network, so that the compression strength of regeneration concrete enhances, so that after regeneration concrete molding not
It is easy cracking, is conducive to extend the service life of regeneration concrete, meanwhile, also help each component mixing in regeneration concrete
It is uniformly dispersed, reduces regeneration concrete and occur the phenomenon that bleeding or isolation during being stirred；In addition, according to phase patibhaga-nimitta
Dissolubility, portland cement and silane coupling agent contain element silicon, are conducive to the phase for improving portland cement and silane coupling agent
Capacitive advantageously reduces the bleeding rate of regeneration concrete, makes so that portland cement is easier to be blended uniformly with silane coupling agent
It obtains regeneration concrete and is not easy bleeding or segregation phenomenon occur during mixing.
The present invention is further arranged to: the mass percent that the natural aggregate accounts for recycled coarse aggregate is 50%-80%.
It by adopting the above technical scheme, is setting for 50%-80% by the mass percent that natural aggregate accounts for recycled coarse aggregate
It sets, is conducive to the intensity for improving recycled coarse aggregate, to be conducive to improve regeneration concrete intensity after molding, reduce because of brickbat
Stone, waste concrete block intensity it is too low and the case where cause the intensity of regeneration concrete not meet standard requirements, be conducive to improve
The compression strength of regeneration concrete, so that being not easily susceptible to cracking after regeneration concrete molding.
The present invention is further arranged to: the industrial residue is flyash.
By adopting the above technical scheme, it is the setting of flyash by industrial residue, is conducive to rationally utilize resource, reduces powder
Pollution of the coal ash to atmosphere and environment；Meanwhile flyash being added in regeneration concrete and is conducive to save cement and fine aggregate, make
Handy discharge reduction, while the workability for improving regeneration concrete mixture is also helped, so that the bleeding rate of regeneration concrete
Decline reduces the phenomenon that regeneration concrete is easy to appear bleeding or isolation during being stirred.
The present invention is further arranged to: the partial size of the recycled fine aggregate is 0-5mm.
By adopting the above technical scheme, the setting for being 0-5mm by the partial size of recycled fine aggregate is conducive to improve regeneration coagulation
Make recycled fine aggregate be easier to be uniformly mixed with the other components in regeneration concrete while the compression strength of soil, has
Conducive to the bleeding rate for reducing regeneration concrete, so that the compression strength performance and bleeding performance of regeneration concrete are more suitable for
Actual production and application.
The present invention is further arranged to: further include the component of following mass fraction:
1.5-2 parts of toughener.
By adopting the above technical scheme, by the way that toughener is added, be conducive to the toughness for enhancing rubber latex, so that regeneration coagulation
The compression strength enhancing of soil is conducive to enhance the resistance to of regeneration concrete so that being not easily susceptible to cracking after regeneration concrete molding
Long property.
The present invention is further arranged to: further include the component of following mass fraction:
7.5-10 parts of SILICA FUME.
By adopting the above technical scheme, by the way that SILICA FUME is added, there is high-intensitive characteristic using SILICA FUME, so that regeneration is mixed
The compression strength for coagulating soil improves, so that be not easily susceptible to cracking after regeneration concrete molding, meanwhile, the main component of SILICA FUME is dioxy
SiClx, silica surface are generally easy there are the stronger hydroxyl of polarity, hydrogen bond easy to form without hydrophobic treatment, thus two
The hydroxyl of silicon oxide surface is easy the hydroxyl on the silanol hydrolyzed to form with silane coupling agent and the hydroxyl on portland cement surface
Dehydration condensation, which occurs, for base makes score so that SILICA FUME is tied with silane coupling agent and portland cement
Subchain is longer, is conducive to the formation of cross-linked network, so that regeneration concrete compression strength enhancing after molding, so that regeneration
It is not easily susceptible to cracking after concrete formation；In addition, silica is also easy to occur with the hydrated product calcium hydroxide of portland cement
Secondary reaction of hydration forms gelled product, improves the microstructure of slurry, improve regeneration concrete formed body mechanical property and
Durability.
The present invention is further arranged to: the partial size of the SILICA FUME is 800-1500 mesh.
By adopting the above technical scheme, it is the setting of 800-1500 mesh by the partial size of SILICA FUME, is conducive to SILICA FUME filling
The crack of hole and recycled coarse aggregate and recycled fine aggregate between cement granules is conducive to the filing effect for improving SILICA FUME,
So that the compression strength and durability of recycled coarse aggregate and recycled fine aggregate improve；Meanwhile SILICA FUME is unformed spherical particle,
Be conducive to improve the rheological property of regeneration concrete.
The present invention is further arranged to: further include the component of following mass fraction:
7.5-10 parts of water glass solution.
By adopting the above technical scheme, by the way that water glass solution is added, using water glass solution and recycled coarse aggregate and again
The cement-hydrate filling recycled coarse aggregate on raw fine aggregate surface and hole and the crack of recycled fine aggregate, are conducive to improve again
The apparent density of raw coarse aggregate and recycled fine aggregate, so that the compression strength and durability of recycled coarse aggregate and recycled fine aggregate
It improves, so that being not easily susceptible to cracking after regeneration concrete molding, is conducive to extend the service life of regeneration concrete.
Regeneration concrete of the invention is using made of following preparation method:
(1) portland cement is added in cement mixer and stirs；
(2) it is molten that water, water-reducing agent, rubber latex, silane coupling agent, toughener, SILICA FUME, waterglass are added while stirring
Liquid obtains pre-composition after mixing evenly；
(3) it is deep that garrulous bricks and stones, waste concrete block, natural aggregate, middle sand, flyash, CM-DPS are added in sandstone blender
Degree penetrant crystalline sealing waterproofing agent simultaneously stirs, and obtains regenerated aggregate after mixing evenly；
(4) pre-composition and regenerated aggregate are added in concrete mixer and stirs, stirs evenly and is formed after conserving
Regeneration concrete.
In conclusion the invention has the following advantages:
1. being conducive to enhance recycled coarse aggregate and regeneration being thin by the way that CM-DPS depth of penetration crystallization sealing waterproofing agent is added
The hardness and compactness gathered materials, waterproofing agent are penetrated into the crack of recycled coarse aggregate and recycled fine aggregate, are conducive to reinforcement
The intensity of recycled coarse aggregate and recycled fine aggregate, to be conducive to enhance the endurance quality of regeneration concrete, so that again
The compression strength of growing concrete enhances；
2. being conducive to the toughness for enhancing regeneration concrete, so that the pressure resistance of regeneration concrete by the way that rubber latex is added
Degree enhancing, so that being not easily susceptible to cracking after regeneration concrete molding；
3. being conducive to improve the compatible of the organic matter and inorganic filler in regeneration concrete by the way that silane coupling agent is added
Property, so that rubber latex is dispersed more uniform in regeneration concrete, so that regeneration concrete is in the mistake being stirred
It is not easy the phenomenon that bleeding or isolation occur in journey；
4. silane coupling agent in coupling process, need to first hydrolyze to form silanol, easy to form since the polarity of silanol is extremely strong
Hydrogen bond, the hydroxyl on different silanols are easy mutual dehydrating condensation, meanwhile, the hydroxyl on silanol is also easy to and portland cement table
The silicone hydroxyl dehydrating condensation in face, and silane coupling agent is coupled with rubber latex simultaneously, to be conducive to the extension of strand, favorably
In the formation of cross-linked network, so that the compression strength of regeneration concrete enhances, so that being not easy after regeneration concrete molding
Cracking, meanwhile, it reduces regeneration concrete and occurs the phenomenon that bleeding or isolation during being stirred；
5. according to similar intermiscibility, portland cement and silane coupling agent contain element silicon so that portland cement with
Silane coupling agent is easier to be blended uniformly, so that regeneration concrete is not easy bleeding or isolation occur during mixing
Phenomenon.
Specific embodiment
With reference to embodiments, invention is further described in detail.
In following embodiment, portland cement uses the Wa stone P.O42.5 portland cement of Wuhan Yangluo cement plant production.
In following embodiment, water-reducing agent is subtracted using the put forth energy model HPWR model Q8011 of building materials Co., Ltd of Shaanxi
Aqua.
In following embodiment, rubber latex uses the trade mark of Zhengzhou Xin Ke chemical products Co., Ltd for the rubber of SW-02
Lotion.
In following embodiment, silane coupling agent uses the silicon of the model 174 of Dongguan City Ding Hai plastic cement Chemical Co., Ltd.
Alkane coupling agent kh-570.
In following embodiment, toughener uses the increasing of the model DH-C002 of Dongguan City Ding Hai plastic cement Chemical Co., Ltd.
Tough dose.
In following embodiment, water glass solution use the article No. of Jinan Duan Xing Chemical Industry Science Co., Ltd for 053 broken glass
Glass solution.
Embodiment 1
A kind of regeneration concrete, the component including following mass fraction:
Water 4.5kg；Portland cement 15kg；Water-reducing agent 1.5kg；Recycled coarse aggregate 60kg, in which: garrulous bricks and stones 15kg, give up
Concrete block 15kg, natural aggregate 30kg；Recycled fine aggregate 37.5kg, in which: middle sand 18.75kg, flyash 18.75kg；CM-
DPS depth of penetration crystallization sealing waterproofing agent 1.5kg；Rubber latex 10.5kg；Silane coupling agent 3kg.
In the present embodiment, the partial size of recycled fine aggregate is 0.1mm.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, portland cement 15kg is added, is carried out with the revolving speed of 200r/min
Stirring；
(2) water 4.5kg, water-reducing agent 1.5kg, rubber latex 10.5kg, silane coupling agent 3kg, stirring are added while stirring
After uniformly, pre-composition is obtained；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 15kg, waste concrete block 15kg, natural aggregate is added
30kg, middle sand 18.75kg, flyash 18.75kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.5kg, with 200r/min's
Revolving speed is stirred, and obtains regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Embodiment 2
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
10.5kg, waste concrete block 14kg, natural aggregate 45.5kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash
21.5kg；CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg；Rubber latex 12.25kg；Silane coupling agent 3.5kg.
In the present embodiment, the partial size of recycled fine aggregate is 2.5mm.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) water 5.25kg, water-reducing agent 1.75kg, rubber latex 12.25kg, silane coupling agent 3.5kg are added while stirring,
After mixing evenly, pre-composition is obtained；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 10.5kg, waste concrete block 14kg, natural aggregate is added
45.5kg, middle sand 21.5kg, flyash 21.5kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg, with 200r/min
Revolving speed be stirred, obtain regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Embodiment 3
A kind of regeneration concrete, the component including following mass fraction:
Water 6kg；Portland cement 20kg；Water-reducing agent 2kg；Recycled coarse aggregate 80kg, in which: garrulous bricks and stones 8kg, waste concrete
Block 8kg, natural aggregate 64kg；Recycled fine aggregate 50kg, in which: middle sand 25kg, flyash 25kg；The crystallization of CM-DPS depth of penetration
Seal waterproofing agent 2kg；Rubber latex 14kg；Silane coupling agent 4kg.
In the present embodiment, the partial size of recycled fine aggregate is 5mm.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, portland cement 20kg is added, is carried out with the revolving speed of 200r/min
Stirring；
(2) water 6kg, water-reducing agent 2kg, rubber latex 14kg, silane coupling agent 4kg are added while stirring, after mixing evenly,
Obtain pre-composition；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 8kg, waste concrete block 8kg, natural aggregate is added
64kg, middle sand 25kg, flyash 25kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 2kg, are carried out with the revolving speed of 200r/min
Stirring, obtains regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Embodiment 4
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
10.5kg, waste concrete block 14kg, natural aggregate 45.5kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash
21.5kg；CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg；Rubber latex 12.25kg；Silane coupling agent 3.5kg；Increase
Tough dose of 1.5kg；SILICA FUME 7.5kg；Water glass solution 7.5kg.
In the present embodiment, the partial size of recycled fine aggregate is 0.1mm.
In the present embodiment, it for the partial size of J-1018 is 800 that SILICA FUME, which uses the article No. of Shanghai Xian Bang Chemical Co., Ltd.,
Purpose SILICA FUME.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) while stirring be added water 5.25kg, water-reducing agent 1.75kg, rubber latex 12.25kg, silane coupling agent 3.5kg,
Toughener 1.5kg, SILICA FUME 7.5kg, water glass solution 7.5kg obtain pre-composition after mixing evenly；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 10.5kg, waste concrete block 14kg, natural aggregate is added
45.5kg, middle sand 21.5kg, flyash 21.5kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg, with 200r/min
Revolving speed be stirred, obtain regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Embodiment 5
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
10.5kg, waste concrete block 14kg, natural aggregate 45.5kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash
21.5kg；CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg；Rubber latex 12.25kg；Silane coupling agent 3.5kg；Increase
Tough dose of 1.75kg；SILICA FUME 8.75kg；Water glass solution 8.75kg.
In the present embodiment, the partial size of recycled fine aggregate is 2.5mm.
In the present embodiment, it for the partial size of J-1018 is 1150 that SILICA FUME, which uses the article No. of Shanghai Xian Bang Chemical Co., Ltd.,
Purpose SILICA FUME.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) while stirring be added water 5.25kg, water-reducing agent 1.75kg, rubber latex 12.25kg, silane coupling agent 3.5kg,
Toughener 1.75kg, SILICA FUME 8.75kg, water glass solution 8.75kg obtain pre-composition after mixing evenly；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 10.5kg, waste concrete block 14kg, natural aggregate is added
45.5kg, middle sand 21.5kg, flyash 21.5kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg, with 200r/min
Revolving speed be stirred, obtain regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Embodiment 6
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
10.5kg, waste concrete block 14kg, natural aggregate 45.5kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash
21.5kg；CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg；Rubber latex 12.25kg；Silane coupling agent 3.5kg；Increase
Tough dose of 2kg；SILICA FUME 10kg；Water glass solution 10kg.
In the present embodiment, the partial size of recycled fine aggregate is 5mm.
In the present embodiment, it for the partial size of J-1018 is 1200 that SILICA FUME, which uses the article No. of Shanghai Xian Bang Chemical Co., Ltd.,
Purpose SILICA FUME.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) while stirring be added water 5.25kg, water-reducing agent 1.75kg, rubber latex 12.25kg, silane coupling agent 3.5kg,
Toughener 2kg, SILICA FUME 10kg, water glass solution 10kg obtain pre-composition after mixing evenly；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 10.5kg, waste concrete block 14kg, natural aggregate is added
45.5kg, middle sand 21.5kg, flyash 21.5kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg, with 200r/min
Revolving speed be stirred, obtain regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Comparative example 1
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
10.5kg, waste concrete block 14kg, natural aggregate 45.5kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash
21.5kg。
In the present embodiment, the partial size of recycled fine aggregate is 2.5mm.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) water 5.25kg is added while stirring, water-reducing agent 1.75kg obtains pre-composition after mixing evenly；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 10.5kg, waste concrete block 14kg, natural aggregate is added
45.5kg, middle sand 21.5kg, flyash 21.5kg, are stirred with the revolving speed of 200r/min, obtain regeneration collection after mixing evenly
Material；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Comparative example 2
A kind of regeneration concrete, the component including following mass fraction:
Water 5.25kg；Portland cement 17.5kg；Water-reducing agent 1.75kg；Recycled coarse aggregate 70kg, in which: garrulous bricks and stones
24kg, waste concrete block 25kg, natural aggregate 21kg；Recycled fine aggregate 43kg, in which: middle sand 21.5kg, flyash 21.5kg；
CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg；Rubber latex 12.25kg；Silane coupling agent 3.5kg.
In the present embodiment, the partial size of recycled fine aggregate is 2.5mm.
Regeneration concrete the preparation method is as follows:
(1) in cement mixer, under normal temperature condition, be added portland cement 17.5kg, with the revolving speed of 200r/min into
Row stirring；
(2) water 5.25kg, water-reducing agent 1.75kg, rubber latex 12.25kg, silane coupling agent 3.5kg are added while stirring,
After mixing evenly, pre-composition is obtained；
(3) in sandstone blender, under normal temperature condition, garrulous bricks and stones 24kg, waste concrete block 25kg, natural aggregate is added
21kg, middle sand 21.5kg, flyash 21.5kg, CM-DPS depth of penetration crystallization sealing waterproofing agent 1.75kg, with 200r/min's
Revolving speed is stirred, and obtains regenerated aggregate after mixing evenly；
(4) in concrete mixer, under normal temperature condition, pre-composition and regenerated aggregate is added, with turning for 200r/min
Speed is stirred, and is paved rapidly after mixing evenly to construction surface, is formed molding regeneration concrete after conserving.
Each embodiment and the detection data of comparative example are shown in Table 1-2.
Experiment 1
It is mixed according to ASTM C1585-2013 " standard test method of measurement water cement concrete water absorption rate " detection regeneration
Coagulate the water absorption rate (%) of soil.
Experiment 2
The 28d of regeneration concrete is detected according to GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete "
Compression strength (MPa).
Experiment 3
According to the bleeding testing inspection in GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard "
The bleeding rate (%) of regeneration concrete.
Table 1
| Comparative example 1 | Comparative example 2 | |
| Water absorption rate | 18 | 7 |
| 28d compression strength | 25.3 | 18.1 |
| Bleeding rate | 18 | 12 |
Table 2
It can be obtained according to embodiment 1-3 in table 1 and table 2 and the data comparison of comparative example 1, be seeped by the way that CM-DPS depth is added
Crystallization sealing waterproofing agent, waterproofing agent penetrate into the crack of recycled coarse aggregate and recycled fine aggregate thoroughly so that recycled coarse aggregate with
And the hardness and compactness of recycled fine aggregate enhance, to be conducive to improve the endurance quality and resistance to compression of regeneration concrete
Intensity, while water absorption rate is advantageously reduced, so that being not easily susceptible to cracking after regeneration concrete molding；By the way that rubber latex is added, have
Conducive to the toughness for improving regeneration concrete, so that the compression strength of regeneration concrete enhances, so that after regeneration concrete molding not
It is easy cracking；By the way that silane coupling agent is added, it is compatible with the other components in regeneration concrete to be conducive to enhancing rubber latex
Property, so that rubber latex is easier to be uniformly mixed with the other components in regeneration concrete, so that the bleeding rate of regeneration concrete
It reduces, so that regeneration concrete is not easy the phenomenon that bleeding or isolation occur during being stirred；Meanwhile silane
Coupling agent need to first hydrolyze to form silanol when playing coupled action, and portland cement surface is also possible to meeting absorbed portion water, shape
At silicone hydroxyl, the polarity of the silanol hydrolyzed to form due to silane coupling agent is extremely strong, hydrogen bond easy to form, so that different silanols
Between hydroxyl be easy mutual dehydrating condensation, the hydroxyl on silanol is also easy to and the mutual phase dehydration of the hydroxyl on portland cement surface contracts
It closes, and silane coupling agent is coupled with rubber latex, to be conducive to the extension of strand, is conducive to the formation of cross-linked network, into
And be conducive to improve the compression strength of regeneration concrete, so that regeneration concrete is not easily susceptible to cracking, while it is mixed to also help regeneration
Each component mixing in solidifying soil is uniformly dispersed, reduce the bleeding rate of regeneration concrete, reduces regeneration concrete and is being stirred
Occurs the phenomenon that bleeding or isolation in the process；According to similar intermiscibility, portland cement and silane coupling agent contain element silicon,
Be conducive to portland cement and mutually mix with silane coupling agent be uniformly dispersed, advantageously reduces the bleeding rate of regeneration concrete, subtract
There is the phenomenon that bleeding or isolation during being stirred in few regeneration concrete.
It can be obtained according to embodiment 1-3 in table 1 and table 2 and the data comparison of comparative example 2, it is thick to account for regeneration by natural aggregate
The mass percent gathered materials is the setting of 50%-80%, is conducive to the intensity for improving recycled coarse aggregate, to be conducive to improve again
The compression strength of growing concrete, so that being not easily susceptible to cracking after regeneration concrete molding；When natural aggregate accounts for the matter of recycled coarse aggregate
When measuring percentage lower than 50%, the compression strength of regeneration concrete sharply declines, so that regeneration concrete is unsuitable for practical application.
Can be obtained according to the data comparison of embodiment 1-3 in table 2 and embodiment 4-6, by be added flyash, toughener and
SILICA FUME can improve the compression strength of regeneration concrete to a certain extent, so that being not easily susceptible to cracking after regeneration concrete molding；
The bleeding of regeneration concrete can be reduced to a certain extent by the way that flyash and SILICA FUME is added, so that regeneration concrete exists
It is not easy the phenomenon that bleeding or isolation occur during mixing；Be conducive to improve regeneration slightly by the way that water glass solution is added
Gather materials and the compactness of recycled fine aggregate, to be conducive to improve the compression strength of regeneration concrete, so that regeneration concrete
It is not easily susceptible to cracking after molding, is conducive to extend the service life of regeneration concrete.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of regeneration concrete, it is characterized in that: including the component of following mass fraction:
4.5-6 parts of water；
15-20 parts of portland cement；
1.5-2 parts of water-reducing agent；
60-80 parts of recycled coarse aggregate, the recycled coarse aggregate is the mixture of garrulous bricks and stones, waste concrete block, natural aggregate；
37.5-50 parts of recycled fine aggregate, the recycled fine aggregate is the mixture of middle sand and industrial residue；
Waterproofing agent 1.5-2 parts of sealing of the crystallization of CM-DPS depth of penetration；
10.5-14 parts of rubber latex；
3-4 parts of silane coupling agent.
2. regeneration concrete according to claim 1, it is characterized in that: the natural aggregate accounts for the quality hundred of recycled coarse aggregate
Divide than being 50%-80%.
3. regeneration concrete according to claim 1 to 2, it is characterized in that: the industrial residue is flyash.
4. regeneration concrete according to claim 1 to 2, it is characterized in that: the partial size of the recycled fine aggregate is 0-
5mm。
5. regeneration concrete according to claim 1 to 2, it is characterized in that: further including the component of following mass fraction:
1.5-2 parts of toughener.
6. regeneration concrete according to claim 1 to 2, it is characterized in that: further including the component of following mass fraction:
7.5-10 parts of SILICA FUME.
7. regeneration concrete according to claim 1 to 2, it is characterized in that: the partial size of the SILICA FUME is 800-1500
Mesh.
8. regeneration concrete according to claim 1 to 2, it is characterized in that: further including the component of following mass fraction:
7.5-10 parts of water glass solution.
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| CN113968718A (en) * | 2021-10-25 | 2022-01-25 | 北京建工一建工程建设有限公司 | Recycled concrete and preparation method thereof |
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