CN116751016A - Concrete containing construction waste for preparing prefabricated laminated slab - Google Patents
Concrete containing construction waste for preparing prefabricated laminated slab Download PDFInfo
- Publication number
- CN116751016A CN116751016A CN202310845897.7A CN202310845897A CN116751016A CN 116751016 A CN116751016 A CN 116751016A CN 202310845897 A CN202310845897 A CN 202310845897A CN 116751016 A CN116751016 A CN 116751016A
- Authority
- CN
- China
- Prior art keywords
- coarse aggregate
- recycled coarse
- concrete
- construction waste
- preparing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 74
- 239000002699 waste material Substances 0.000 title claims abstract description 55
- 238000010276 construction Methods 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 46
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims abstract description 34
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 32
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 31
- 239000008116 calcium stearate Substances 0.000 claims abstract description 31
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000003607 modifier Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 10
- 238000002791 soaking Methods 0.000 claims abstract description 10
- 238000002715 modification method Methods 0.000 claims abstract description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 7
- 229920005646 polycarboxylate Polymers 0.000 claims description 21
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims description 17
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 235000010755 mineral Nutrition 0.000 description 8
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 6
- 229920005551 calcium lignosulfonate Polymers 0.000 description 6
- 239000012634 fragment Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000012216 screening Methods 0.000 description 6
- 239000000176 sodium gluconate Substances 0.000 description 6
- 229940005574 sodium gluconate Drugs 0.000 description 6
- 235000012207 sodium gluconate Nutrition 0.000 description 6
- 238000005056 compaction Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 108010068370 Glutens Proteins 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 235000021312 gluten Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 229920005552 sodium lignosulfonate Polymers 0.000 description 1
- 238000010998 test 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
- C04B20/1025—Fats; Fatty oils; Ester type waxes; Higher fatty acids; Derivatives thereof
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application relates to the technical field of concrete, and in particular discloses concrete containing construction waste and used for preparing an assembled prefabricated laminated slab, which comprises the following components: the modification method of the water, cement, fly ash, fine aggregate, modified recycled coarse aggregate and water reducer comprises the following steps: 1) Mixing calcium stearate and zinc stearate, and heating to completely melt to obtain a modifier; 2) Putting the recycled coarse aggregate into a modifier for soaking, filtering out the recycled coarse aggregate, and cooling to obtain pretreated recycled coarse aggregate; 3) And (3) putting the pretreated recycled coarse aggregate into silicon carbide, stirring, polishing and filtering to obtain the modified recycled coarse aggregate. The application has the advantage of improving the impermeability of the concrete containing construction waste after curing for preparing the prefabricated laminated slab. The application effectively consumes construction waste by adding the recycled coarse aggregate, reduces environmental pollution and is environment-friendly.
Description
Technical Field
The application relates to the field of concrete, in particular to concrete containing construction waste and used for preparing an assembled prefabricated laminated slab.
Background
The composite floor slab is an assembled floor slab formed by superposing prefabricated composite slabs and cast-in-situ concrete layers, the prefabricated composite slabs are not only one of the components of the floor slab structure, but also permanent templates of the cast-in-situ reinforced concrete composite layers, the composite floor slab has good integrity and high rigidity, casting templates can be saved, the upper and lower surfaces of the slab are flat, decoration of the facing layers is facilitated, and the composite floor slab is suitable for high-rise buildings and large-bay buildings with high overall rigidity requirements.
Along with technological development, building technology is iterated continuously, a large amount of waste buildings are removed and rebuilt, so that more and more building wastes are caused, the building wastes are mainly concrete fragments and are difficult to degrade, a large amount of space is occupied for storing the building wastes, and the environment is seriously affected, so that the recycling of the building wastes is particularly important.
The recycling of construction waste is generally realized by crushing construction waste, screening out concrete fragments to form recycled aggregate, and mixing the recycled aggregate formed by the construction waste into fresh concrete to be used as aggregate, but the recycled aggregate is formed by crushing by external force, so that the recycled aggregate has more cracks and higher water absorption rate compared with natural aggregate, the compactness of the prepared concrete material is reduced, and the construction waste is applied to the concrete for preparing the fabricated prefabricated laminated slab.
Disclosure of Invention
In order to improve the impermeability of the concrete containing the construction waste after curing for preparing the prefabricated laminated slab, the application provides the concrete containing the construction waste for preparing the prefabricated laminated slab.
The concrete containing construction waste for preparing the prefabricated laminated slab provided by the application adopts the following technical scheme:
the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following components in parts by mass: 100 parts of water;
228-232 parts of cement;
33-35 parts of fly ash;
435-440 parts of fine aggregate;
710-720 parts of modified recycled coarse aggregate;
3.6-3.8 parts of water reducer;
the modified recycled coarse aggregate is formed by modifying recycled coarse aggregate;
the recycled coarse aggregate is formed by crushing construction waste;
the modification method of the modified recycled coarse aggregate comprises the following steps:
step 1), mixing calcium stearate and zinc stearate, and heating to completely melt to obtain a modifier;
step 2), putting the recycled coarse aggregate into a modifier for soaking, filtering out the recycled coarse aggregate, and cooling to obtain pretreated recycled coarse aggregate; and 3) putting the pretreated recycled coarse aggregate into silicon carbide, stirring and polishing until the calcium stearate and zinc stearate mixture on the surface of the pretreated recycled coarse aggregate are peeled off, and filtering to obtain the modified recycled coarse aggregate.
Through adopting above-mentioned technical scheme, through carrying out the modification with the recycled aggregate for in the crack of molten calcium stearate, zinc stearate mixture infiltration recycled aggregate, carried out the reinforcement to recycled aggregate, make recycled aggregate's compressive strength improve, improved recycled aggregate's compactness simultaneously, the concrete of making is closely knit after the solidification improvement, thereby improved the impervious performance after the concrete solidification, the prefabricated superimposed sheet impervious performance of making improves by a wide margin, the difficult phenomenon of leaking appears, the quality is better.
Through heating and melting the mixture of calcium stearate and zinc stearate, crystals which are formed after the mixture is melted and cooled and are not calcium stearate and zinc stearate powder in the recycled aggregate are formed, so that the structure stability is higher, the strength is higher, and the effect of improving the compactness is better.
Through carborundum polishing for the crystal that regeneration aggregate surface cooling formed is polished and drops, exposes regeneration aggregate surface, and the crystal that drops can make full use of through screening, reduces the material extravagant, makes regeneration aggregate surface more coarse simultaneously, and then the seaming force of improvement regeneration aggregate that can be better and set cement helps improving the intensity after the concrete solidification, and the quality is better.
Preferably, the mass ratio of the calcium stearate to the zinc stearate is 1-2:3-4.
By adopting the technical scheme, the effect of modifying the recycled aggregate is better by selecting the mass ratio of the calcium stearate to the zinc stearate, so that the recycled aggregate has stronger hydrophobicity and better lubricity, and the prepared concrete has higher fluidity and is easier to construct.
Preferably, the mass ratio of the calcium stearate to the zinc stearate is 1.5:3.5.
through adopting above-mentioned technical scheme, through calcium stearate, zinc stearate with specific mass ratio cooperation, the effect of modified recycled aggregate is better, and the mobility of concrete is better, and the workability is better, and intensity after the solidification is higher, and the quality is better.
Preferably, in the step 2), the recycled coarse aggregate is heated and dried and then is put into the modifier for soaking.
By adopting the technical scheme, the recycled aggregate is heated firstly, so that the moisture in the recycled aggregate is reduced, the recycled aggregate is put into molten calcium stearate and zinc stearate to be heated to about 160 ℃, the phenomenon that the recycled aggregate is further damaged due to volume expansion when a large amount of moisture is instantaneously heated is reduced, and the quality of the prepared modified recycled aggregate is better.
Preferably, the particle size of the recycled coarse aggregate is 25-40mm.
By adopting the technical scheme, the prepared concrete has better quality, higher compactness and better impermeability by specifically selecting the particle size of the recycled aggregate and better matching with the fine aggregate.
Preferably, the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
Through adopting above-mentioned technical scheme, through the compounding of concrete selection sodium lignin sulfonate, calcium lignin sulfonate, polycarboxylate water-reducing agent forming water-reducing agent, the effect of subtracting water is better, cooperates with modified recycled aggregate, and the mobility of concrete is better, has higher slump, and workability is better, can make the concrete have stronger self-compaction performance simultaneously, and the compactness is higher after the solidification, and the impervious performance is better.
Preferably, the mass ratio of the sodium lignin sulfonate to the calcium lignin sulfonate to the polycarboxylate water reducer is 1:1:3.
by adopting the technical scheme, the mass ratio of the sodium lignin sulfonate, the calcium lignin sulfonate and the polycarboxylate water reducer is specifically selected, so that the effect of the modified recycled aggregate is better, the self-compaction effect of the concrete is better, and the impermeability of the cured concrete is better.
Preferably, the method for preparing the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps:
step 01), uniformly mixing water, cement, fly ash and a water reducing agent to prepare cement slurry;
and 02) throwing the fine aggregate and the modified recycled coarse aggregate into cement slurry, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
By adopting the technical scheme, the prepared concrete has good fluidity, and when the prefabricated laminated slab is prepared, the good self-compaction effect can be still realized under the blocking of the reinforcing steel bars, and the prepared prefabricated laminated slab has high compactness, good impermeability and difficult water leakage and water seepage phenomena.
In summary, the application has the following beneficial effects:
1. according to the application, the recycled aggregate is modified, so that the melted mixture of calcium stearate and zinc stearate permeates into cracks of the recycled aggregate, the recycled aggregate is reinforced, the compressive strength of the recycled aggregate is improved, the compactness of the prepared concrete after solidification is improved, the impermeability of the prepared prefabricated laminated slab is greatly improved, the water leakage phenomenon is not easy to occur, and the quality is better.
2. According to the application, the effect of modifying the recycled aggregate is better by selecting the mass ratio of the calcium stearate to the zinc stearate, so that the recycled aggregate has stronger hydrophobicity and better lubricity, and the prepared concrete has higher fluidity and is easier to construct.
3. According to the application, the water reducer is preferably formed by compounding the sodium lignin sulfonate, the calcium lignin sulfonate and the polycarboxylate water reducer, the water reducing effect is better, the water reducer is matched with the modified recycled aggregate, the fluidity of concrete is better, the slump is higher, the workability is better, and meanwhile, the concrete has stronger self-compaction performance, higher compactness after solidification and better impermeability.
Drawings
FIG. 1 is a schematic diagram of a product of application example 1;
fig. 2 is a construction process structure installation diagram of application example 2.
Detailed Description
The present application will be described in further detail with reference to examples.
Example 1
The concrete containing the construction waste and used for preparing the prefabricated laminated slab comprises the following components:
water, cement, fly ash, fine aggregate, modified recycled coarse aggregate and water reducer.
Wherein the water is tap water.
Wherein, the cement is purchased in Runfeng cement, specification, P.O42.5R and ordinary Portland cement.
Wherein, the fly ash is first-grade fly ash in mineral processing factories of the Pacific shou county Cheng Yun.
Wherein, the fine aggregate is purchased and processed into super-bright mineral products in the Lingshu county, river sand and 4-8 meshes.
Wherein the modified recycled coarse aggregate is formed by modifying recycled coarse aggregate.
The recycled coarse aggregate is obtained by crushing and screening the concrete fragments screened from the construction waste again, and the grain size is 25-40mm.
The modification method of the modified recycled coarse aggregate comprises the following steps:
and 1) adding 100kg of calcium stearate and 300kg of zinc stearate into a stirring kettle, continuously stirring and heating to be completely melted at the rotating speed of 60r/min, and keeping the temperature at 160 ℃ to obtain the modifier.
Step 2), drying the regenerated coarse aggregate for 1h at 120 ℃, then adding the regenerated coarse aggregate into a modifier in batches for soaking, wherein the mass of each time is 200kg, the rotating speed is 20r/min, continuously stirring, soaking for 5min, filtering out the regenerated coarse aggregate through a filter screen, adding the next batch of regenerated coarse aggregate, naturally cooling the filtered regenerated coarse aggregate at room temperature, and continuously vibrating on a vibrating screen in the cooling process to prevent mutual adhesion, thereby obtaining the pretreated regenerated coarse aggregate.
And 3) putting the pretreated regenerated coarse aggregate into a stirring kettle filled with 100kg of silicon carbide, wherein the grain diameter of the silicon carbide is 5-10mm, the rotating speed is 120r/min, stirring and polishing are carried out, sampling observation is carried out every 10min, the peeling rate of the mixture of calcium stearate and zinc stearate on the surface of the pretreated regenerated coarse aggregate is more than 90%, stirring can be stopped, and the modified regenerated coarse aggregate is obtained through filtering by a filter screen.
Calcium stearate is purchased from wuhank biomedical technologies, inc., CAS:1592-23-0.
Zinc stearate is purchased from wuhank biomedical technologies, inc, CAS:557-05-1.
Wherein the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
Sodium lignin sulfonate was purchased from Shandong Mingjiang chemical Co.
Calcium lignosulfonate was purchased from Shandong Hongquan chemical technology Co., ltd.
The polycarboxylate water reducer is purchased from Wuhan Runxing source technology Co., ltd, and is a general type powder polycarboxylate water reducer.
The preparation method of the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps:
step 01), 100kg of water, 228kg of cement, 33kg of fly ash and 3.6kg of water reducer are put into a stirring kettle, the rotation speed is 120r/min, stirring is carried out for 3min, and cement slurry is prepared by uniformly mixing.
And 02) adding 435kg of fine aggregate and 710kg of modified recycled coarse aggregate into cement slurry at a rotating speed of 40r/min, stirring for 10min, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
Example 2
The concrete containing the construction waste and used for preparing the prefabricated laminated slab comprises the following components:
water, cement, fly ash, fine aggregate, modified recycled coarse aggregate and water reducer.
Wherein the water is tap water.
Wherein, the cement is purchased in Runfeng cement, specification, P.O42.5R and ordinary Portland cement.
Wherein, the fly ash is first-grade fly ash in mineral processing factories of the Pacific shou county Cheng Yun.
Wherein, the fine aggregate is purchased and processed into super-bright mineral products in the Lingshu county, river sand and 4-8 meshes.
Wherein the modified recycled coarse aggregate is formed by modifying recycled coarse aggregate.
The recycled coarse aggregate is obtained by crushing and screening the concrete fragments screened from the construction waste again, and the grain size is 25-40mm.
The modification method of the modified recycled coarse aggregate comprises the following steps:
and 1) putting 150kg of calcium stearate and 350kg of zinc stearate into a stirring kettle, continuously stirring and heating to be completely melted at the rotating speed of 60r/min, and keeping the temperature at 160 ℃ to obtain the modifier.
Step 2), drying the regenerated coarse aggregate for 1h at 120 ℃, then adding the regenerated coarse aggregate into a modifier in batches for soaking, wherein the mass of each time is 200kg, the rotating speed is 20r/min, continuously stirring, soaking for 5min, filtering out the regenerated coarse aggregate through a filter screen, adding the next batch of regenerated coarse aggregate, naturally cooling the filtered regenerated coarse aggregate at room temperature, and continuously vibrating on a vibrating screen in the cooling process to prevent mutual adhesion, thereby obtaining the pretreated regenerated coarse aggregate.
And 3) putting the pretreated regenerated coarse aggregate into a stirring kettle filled with 100kg of silicon carbide, wherein the grain diameter of the silicon carbide is 5-10mm, the rotating speed is 120r/min, stirring and polishing are carried out, sampling observation is carried out every 10min, the peeling rate of the mixture of calcium stearate and zinc stearate on the surface of the pretreated regenerated coarse aggregate is more than 90%, stirring can be stopped, and the modified regenerated coarse aggregate is obtained through filtering by a filter screen.
Calcium stearate is purchased from wuhank biomedical technologies, inc., CAS:1592-23-0.
Zinc stearate is purchased from wuhank biomedical technologies, inc, CAS:557-05-1.
Wherein the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
Sodium lignin sulfonate was purchased from Shandong Mingjiang chemical Co.
Calcium lignosulfonate was purchased from Shandong Hongquan chemical technology Co., ltd.
The polycarboxylate water reducer is purchased from Wuhan Runxing source technology Co., ltd, and is a general type powder polycarboxylate water reducer.
The preparation method of the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps:
step 01), 100kg of water, 230kg of cement, 34kg of fly ash and 3.7kg of water reducer are put into a stirring kettle, the rotation speed is 120r/min, stirring is carried out for 3min, and cement slurry is prepared by uniformly mixing.
And 02) throwing 437kg of fine aggregate and 715kg of modified recycled coarse aggregate into cement slurry at a rotating speed of 40r/min, stirring for 10min, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
Example 3
The concrete containing the construction waste and used for preparing the prefabricated laminated slab comprises the following components:
water, cement, fly ash, fine aggregate, modified recycled coarse aggregate and water reducer.
Wherein the water is tap water.
Wherein, the cement is purchased in Runfeng cement, specification, P.O42.5R and ordinary Portland cement.
Wherein, the fly ash is first-grade fly ash in mineral processing factories of the Pacific shou county Cheng Yun.
Wherein, the fine aggregate is purchased and processed into super-bright mineral products in the Lingshu county, river sand and 4-8 meshes.
Wherein the modified recycled coarse aggregate is formed by modifying recycled coarse aggregate.
The recycled coarse aggregate is obtained by crushing and screening the concrete fragments screened from the construction waste again, and the grain size is 25-40mm.
The modification method of the modified recycled coarse aggregate comprises the following steps:
step 1), 200kg of calcium stearate and 400kg of zinc stearate are put into a stirring kettle, the rotating speed is 60r/min, stirring and heating are continuously carried out until the mixture is completely melted, and the temperature is kept at 160 ℃ to obtain the modifier.
Step 2), drying the regenerated coarse aggregate for 1h at 120 ℃, then adding the regenerated coarse aggregate into a modifier in batches for soaking, wherein the mass of each time is 200kg, the rotating speed is 20r/min, continuously stirring, soaking for 5min, filtering out the regenerated coarse aggregate through a filter screen, adding the next batch of regenerated coarse aggregate, naturally cooling the filtered regenerated coarse aggregate at room temperature, and continuously vibrating on a vibrating screen in the cooling process to prevent mutual adhesion, thereby obtaining the pretreated regenerated coarse aggregate.
And 3) putting the pretreated regenerated coarse aggregate into a stirring kettle filled with 100kg of silicon carbide, wherein the grain diameter of the silicon carbide is 5-10mm, the rotating speed is 120r/min, stirring and polishing are carried out, sampling observation is carried out every 10min, the peeling rate of the mixture of calcium stearate and zinc stearate on the surface of the pretreated regenerated coarse aggregate is more than 90%, stirring can be stopped, and the modified regenerated coarse aggregate is obtained through filtering by a filter screen.
Calcium stearate is purchased from wuhank biomedical technologies, inc., CAS:1592-23-0.
Zinc stearate is purchased from wuhank biomedical technologies, inc, CAS:557-05-1.
Wherein the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
Sodium lignin sulfonate was purchased from Shandong Mingjiang chemical Co.
Calcium lignosulfonate was purchased from Shandong Hongquan chemical technology Co., ltd.
The polycarboxylate water reducer is purchased from Wuhan Runxing source technology Co., ltd, and is a general type powder polycarboxylate water reducer.
The preparation method of the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps:
step 01), 100kg of water, 232kg of cement, 35kg of fly ash and 3.8kg of water reducer are put into a stirring kettle, the rotation speed is 120r/min, stirring is carried out for 3min, and cement slurry is prepared by uniformly mixing.
Step 02), adding 440kg of fine aggregate and 720kg of modified recycled coarse aggregate into cement slurry, stirring for 10min at a rotating speed of 40r/min, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
Comparative example 1
The concrete containing the construction waste and used for preparing the prefabricated laminated slab comprises the following components:
water, cement, fly ash, fine aggregate, recycled coarse aggregate, water reducer, calcium stearate and zinc stearate.
Wherein the water is tap water.
Wherein, the cement is purchased in Runfeng cement, specification, P.O42.5R and ordinary Portland cement.
Wherein, the fly ash is first-grade fly ash in mineral processing factories of the Pacific shou county Cheng Yun.
Wherein, the fine aggregate is purchased and processed into super-bright mineral products in the Lingshu county, river sand and 4-8 meshes.
The recycled coarse aggregate is obtained by crushing and screening the concrete fragments screened from the construction waste again, and the grain size is 25-40mm.
Wherein the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
Sodium lignin sulfonate was purchased from Shandong Mingjiang chemical Co.
Calcium lignosulfonate was purchased from Shandong Hongquan chemical technology Co., ltd.
The polycarboxylate water reducer is purchased from Wuhan Runxing source technology Co., ltd, and is a general type powder polycarboxylate water reducer.
The preparation method of the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps:
step 01), 100kg of water, 230kg of cement, 34kg of fly ash, 3.7kg of water reducer, 3.5kg of calcium stearate and 7kg of zinc stearate are put into a stirring kettle, and are stirred for 3min at a rotating speed of 120r/min, and cement slurry is prepared.
And 02) throwing 437kg of fine aggregate and 715kg of recycled coarse aggregate into cement slurry at a rotating speed of 40r/min, stirring for 10min, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
Comparative example 2
A concrete for preparing prefabricated laminated slabs containing construction waste, differing from example 2 only in that: in the modification method of the modified recycled coarse aggregate, the zinc stearate is replaced by the calcium stearate in equal quantity.
Comparative example 3
A concrete for preparing prefabricated laminated slabs containing construction waste, differing from example 2 only in that: in the modification method of the modified recycled coarse aggregate, zinc stearate is adopted to replace calcium stearate in equal quantity.
Comparative example 4
A concrete for preparing prefabricated laminated slabs containing construction waste, differing from example 2 only in that: in the water reducing agent, sodium gluconate is adopted to replace sodium lignin sulfonate in an equivalent way.
Wherein, sodium gluconate is purchased from Hebei Zhuo environmental protection technology limited company.
Comparative example 5
A concrete for preparing prefabricated laminated slabs containing construction waste, differing from example 2 only in that: in the water reducing agent, sodium gluconate is adopted to replace calcium lignosulfonate in an equivalent way.
Wherein, sodium gluconate is purchased from Hebei Zhuo environmental protection technology limited company.
Comparative example 6
A concrete for preparing prefabricated laminated slabs containing construction waste, differing from example 2 only in that: in the water reducer, sodium gluconate is adopted to replace the polycarboxylate water reducer in equal quantity.
Wherein, sodium gluconate is purchased from Hebei Zhuo environmental protection technology limited company.
Experiment 1
Performance test:
1. compressive strength: the 7d compressive strength and the 28d compressive strength of the samples prepared from the concrete of each example and the comparative example were measured according to GB/T50081-2019 Standard of test method for physical and mechanical properties of concrete.
2. Barrier grade: according to GB/T50082-2009 Standard of method for testing the Long-term Performance and durability of ordinary concrete, the anti-permeation grade of samples prepared from the concrete of each example and comparative example is detected by adopting a progressive pressurization method in a water permeation resistance test.
The specific test data for experiment 1 are detailed in table 1.
TABLE 1
According to the data comparison of each example in the table 1 and the data comparison of the comparative example 1, the recycled coarse aggregate is modified by a special modification method, so that the impervious grade of the concrete after curing can be greatly improved, and when the prefabricated composite slab is manufactured, the prefabricated composite slab is not easy to generate water seepage and water leakage, and the quality of the manufactured composite floor slab is better.
As can be seen from the comparison of the data of each example in table 1 with the data of comparative examples 2 and 3, the strength of the concrete after curing is improved by compounding the modified recycled coarse aggregate with specific selection of calcium stearate and zinc stearate in specific proportions.
According to the data comparison of each example in Table 1 and comparative examples 4-6, the fluidity of the concrete is higher by matching sodium lignosulfonate, calcium lignosulfonate and polycarboxylate water reducer with the modified recycled aggregate, the self-compaction effect is better, the anti-seepage grade after solidification is higher, and the phenomena of water seepage and water leakage are less likely to occur.
Application example 1
The preparation method of the laminated plate comprises the following steps:
cleaning a mould, installing the mould to place ribs, reserving pre-embedding, injecting concrete containing building waste for preparing the prefabricated laminated slab into the mould, tamping, carrying out post-treatment, curing in a kiln, demoulding and lifting to obtain the laminated slab.
The schematic diagram of the product of the obtained laminated plate is shown in figure 1.
Application example 2
The superimposed sheet hoisting process specifically comprises the following steps:
s1, erecting a support frame, namely determining the elevation of the bottom of the laminated slab, and adjusting the support frame to the designed elevation. The supporting distance is not more than 1.5m, the distance between the supporting edges and the plate end is not more than 500mm, and a slurry leakage preventing double faced adhesive tape is stuck on the supporting edges of the aluminum die.
S2, test hanging: and (3) a safety person stands beside, after a rope-pulling worker hooks and binds a traction rope, when the rope-pulling worker withdraws to a safety area, confirming the safety condition around the component by a signal worker, and carrying out test hoisting and hoisting after confirming no errors. And (3) slowly lifting by the signal command, stopping lifting when the signal command is lifted to about 0.5m away from the ground, checking whether the performance of the tower crane such as braking and the like, a lifting appliance and a rigging are reliable, and confirming that the formal lifting procedure can be carried out without errors.
S3, hoisting: the hoisting of the composite floor slab is not less than 4 hoisting points, the 4 hoisting points are required to be uniformly stressed, the horizontal included angle of the sling is not less than 60 degrees, and the horizontal included angle of the sling is not less than 45 degrees. The main hook position of the hoisting equipment, the lifting appliance and the gravity center of the component are ensured to coincide in the vertical direction. The lifting process should be stable, and the operation modes of slow lifting, stable lifting and slow releasing should not be deviated, swaying and twisting.
S4, locating: after approaching the installation position, the hoisting worker catches the traction rope, pulls the component to the upper part of the installation position and slowly descends the component. And a slight pause is made at the position 0.5m above the working layer, the position is adjusted, the direction of the mounting arrow on the plate is ensured to be accurate, and two hoisting workers are guided to fall by hand.
S5, adjusting: after the superimposed sheet falls, fine adjustment is carried out by using a crow bar, the beam is lapped for 10mm, and the error is not more than +/-3 mm. And (3) checking the elevation of the bottom of the laminated slab by using a leveling instrument and a leveling rod, and supporting by adjusting an aluminum die, wherein the error is not more than +/-5 mm.
S6, continuously installing other superimposed sheets in sequence.
S7, binding cast-in-situ beam steel bars: first, liang Mianjin is placed. And drawing the stirrup position on the beam gluten by using chalk. The stirrups are broken off and are arranged in from the side face of the beam. The stirrup is bound with Liang Mianjin. The bottom bar is penetrated from one end of the beam, one person is guided by the drag hook in front, and the other person pushes the steel bar in back. Raising Liang Mianjin and binding the bottom ribs.
S8, checking the stress condition of the support frame, checking the flatness and the height of the laminated plate, and adjusting in time if the design requirement is not met.
The structural installation diagram of the laminated slab construction process is shown in detail in fig. 2.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (8)
1. A concrete containing construction waste for preparing prefabricated laminated slabs, characterized in that: the composite material consists of the following components in parts by weight:
100 parts of water;
228-232 parts of cement;
33-35 parts of fly ash;
435-440 parts of fine aggregate;
710-720 parts of modified recycled coarse aggregate;
3.6-3.8 parts of water reducer;
the modified recycled coarse aggregate is formed by modifying recycled coarse aggregate;
the recycled coarse aggregate is formed by crushing construction waste;
the modification method of the modified recycled coarse aggregate comprises the following steps:
step 1), mixing calcium stearate and zinc stearate, and heating to completely melt to obtain a modifier;
step 2), putting the recycled coarse aggregate into a modifier for soaking, filtering out the recycled coarse aggregate, and cooling to obtain pretreated recycled coarse aggregate;
and 3) putting the pretreated recycled coarse aggregate into silicon carbide, stirring and polishing until the calcium stearate and zinc stearate mixture on the surface of the pretreated recycled coarse aggregate are peeled off, and filtering to obtain the modified recycled coarse aggregate.
2. A concrete for preparing prefabricated laminated slab containing construction waste according to claim 1, wherein: the mass ratio of the calcium stearate to the zinc stearate is 1-2:3-4.
3. A concrete for preparing prefabricated laminated slab containing construction waste according to claim 2, wherein: the mass ratio of the calcium stearate to the zinc stearate is 1.5:3.5.
4. a concrete for preparing prefabricated laminated slab containing construction waste according to claim 1, wherein: in the step 2), the recycled coarse aggregate is heated and dried and then is soaked in the modifier.
5. A concrete for preparing prefabricated laminated slab containing construction waste according to claim 1, wherein: the particle size of the recycled coarse aggregate is 25-40mm.
6. A concrete for preparing prefabricated laminated slab containing construction waste according to claim 1, wherein: the water reducer is a compound of sodium lignin sulfonate, calcium lignin sulfonate and a polycarboxylate water reducer.
7. A concrete for preparing prefabricated laminated slab comprising construction waste according to claim 6, wherein: the mass ratio of the sodium lignin sulfonate to the calcium lignin sulfonate to the polycarboxylate water reducer is 1:1:3.
8. a concrete for preparing prefabricated laminated slab containing construction waste according to claim 1, wherein: the preparation method of the concrete containing the construction waste for preparing the prefabricated laminated slab comprises the following steps of:
step 01), uniformly mixing water, cement, fly ash and a water reducing agent to prepare cement slurry;
and 02) throwing the fine aggregate and the modified recycled coarse aggregate into cement slurry, and uniformly mixing to obtain the concrete containing the construction waste for preparing the prefabricated laminated slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310845897.7A CN116751016A (en) | 2023-07-11 | 2023-07-11 | Concrete containing construction waste for preparing prefabricated laminated slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310845897.7A CN116751016A (en) | 2023-07-11 | 2023-07-11 | Concrete containing construction waste for preparing prefabricated laminated slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116751016A true CN116751016A (en) | 2023-09-15 |
Family
ID=87958969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310845897.7A Pending CN116751016A (en) | 2023-07-11 | 2023-07-11 | Concrete containing construction waste for preparing prefabricated laminated slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116751016A (en) |
-
2023
- 2023-07-11 CN CN202310845897.7A patent/CN116751016A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106082927B (en) | A kind of alkali-activated slag system geopolymer concrete and preparation method thereof | |
| CN107445552A (en) | Cracking resistance enhancing large volume super-long structural concrete and preparation method thereof | |
| US11358902B2 (en) | Production of wet-cast slag-based concrete products | |
| CN110668752B (en) | Municipal asphalt concrete pavement construction method | |
| CN107500648A (en) | A kind of high intensity RPC and preparation method thereof | |
| Río et al. | Exploring the potential of the functionally graded SCCC for developing sustainable concrete solutions | |
| CN113121157A (en) | Quick-hardening early-strength muck geopolymer mortar and preparation method and application thereof | |
| CN115925352A (en) | Explosion-suppression fire-resistant ultrahigh-performance concrete and preparation method thereof | |
| CN115340329A (en) | Recycled fine aggregate-magnesium oxide base expanding agent ultrahigh-performance concrete and preparation method thereof | |
| JP2009073677A (en) | Non-fired tile | |
| CN110512824B (en) | Floor heating backfill process, special material and preparation method thereof | |
| CN108329002A (en) | A kind of light foam geo-polymer composite insulation boards and preparation method thereof | |
| CN116751016A (en) | Concrete containing construction waste for preparing prefabricated laminated slab | |
| CN108863236B (en) | Preparation method of stirring-free ultralight ceramsite concrete cutting board and stirring-free ultralight ceramsite concrete cutting board | |
| Silva et al. | Development of a stabilized natural fiber-reinforced earth composite for construction applications using 3D printing | |
| CN111377682A (en) | Anti-cracking concrete and preparation method thereof, and anti-cracking fabricated prefabricated part composite floor slab and preparation method thereof | |
| Martauz et al. | The properties of concrete based on steel slag as a by-product of metallurgical production | |
| CN115784682A (en) | Fire-resistant anti-explosion ultra-high performance concrete and preparation method thereof | |
| CN106592815A (en) | Manufacturing method of brick wall with high shear resistance and shock resistance | |
| CN110510965A (en) | A kind of impact resistance concrete | |
| CN106564122A (en) | Pre-tensioning method U beam crack control method | |
| Behnood | High-strength concrete incorporating copper slag and ground pumice | |
| Abdulrasool et al. | Effect of partial replacement of fine aggregate by internal curing materials on mechanical properties of concrete | |
| Zhouyi et al. | Research on the performance of modified shell ash mortar used for strengthening of historical masonry buildings | |
| CN117069455A (en) | Low-cement subway evacuation platform plate and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |