CN110128075A - A kind of C30 tailing sand concrete and preparation method thereof - Google Patents
A kind of C30 tailing sand concrete and preparation method thereof Download PDFInfo
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- CN110128075A CN110128075A CN201910475461.7A CN201910475461A CN110128075A CN 110128075 A CN110128075 A CN 110128075A CN 201910475461 A CN201910475461 A CN 201910475461A CN 110128075 A CN110128075 A CN 110128075A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a kind of C30 tailing sand concretes and preparation method thereof.C30 tailing sand concrete includes following components: cement, sand, CHARACTERISTICS OF TAILINGS SAND, stone, water, flyash, slag powders, additive；The fineness modulus of CHARACTERISTICS OF TAILINGS SAND is 2.1-2.3, clay content < 5%；Additive is 1:(0.8-1.2 according to mass ratio by water-reducing agent, flocculant, enhancing component and modified alta-mud): (4.5-5.5): (0.04-0.06) mixed preparing forms；Enhancing component by triethanolamine, dimethyl silicone polymer and modified gangue powder is 1:(0.4-0.6 according to mass ratio): (1.2-1.5) mixed preparing forms.C30 tailing sand concrete of the invention have workability it is good, little loss of slump, and under water construct when be not easy the advantages of dispersing.
Description
Technical field
The present invention relates to building material technical fields, more specifically, it relates to a kind of C30 tailing sand concrete and its system
Preparation Method.
Background technique
With the continuous heating of present real estate, a large amount of uses of the concrete in building trade need river sand resource
The amount of asking is more and more, causes the sand resource in China to largely reduce, present concrete production cost is caused to increase considerably, thus
Illegitimate competition is produced, and brings difficulty to the control of the quality of construction industry.Tailing is the waste after ore dressing, is Industrial Solid
The chief component of body waste, a large amount of CHARACTERISTICS OF TAILINGS SAND not only land occupation, but also the dust pollution environment generated, currently,
The comprehensive utilization of tailing rate in China only has 7%, and therefore, the comprehensive reutilization problem of tailing has been subjected to the extensive pass of the whole society
Note.
In the prior art, application No. is disclose one kind in the Chinese invention patent application file of CN201410193087.9
Large dosage iron tailings sand strong concrete and preparation method thereof, it is made of the raw material of following components: mixed sand, water
Mud, flyash, miberal powder, rubble, water, compound additive, mixed sand are iron tailings sand, nature medium sand, and iron tailings sand replaces natural
The percentage that the weight percent of middle sand, that is, iron tailings sand accounts for mixed sand total weight is 60%-70%, the fineness mould of iron tailings sand
Number is 1.9-2.6.
A large amount of iron tailings is mixed in existing this concrete, because the water absorption rate of iron tailings is larger, rough surface, hole
Gap rate is larger, so iron tailings easily absorbs Free water more in concrete when volume is larger, the slump of concrete is caused to damage
Lose larger, workability is poor, while this large dosage iron tailing concrete is unable to satisfy the requirement of underwater construction, constructs under water
When, concrete is easy dispersion, strength reduction, when therefore, researching and developing that a kind of workability is good, little loss of slump, and constructing under water
The C30 tailing sand concrete for being not easy to disperse is problem to be solved.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of C30 tailing sand concrete,
It is good with workability, little loss of slump, and under water construct when be not easy the advantages of dispersing.
Second object of the present invention is to provide a kind of preparation method of C30 tailing sand concrete, has and simply grasped
The advantages of making.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that a kind of C30 tailing sand concrete, packet
Include the component of following parts by weight: 250-270 parts of cement, 735-797 parts of sands, 240-370 parts of CHARACTERISTICS OF TAILINGS SANDs, 914-934 parts of stones,
180-200 parts of water, 50-70 parts of flyash, 60-80 parts of slag powders, 8.36-9.36 parts of additives；
The fineness modulus of the CHARACTERISTICS OF TAILINGS SAND is 2.1-2.3, clay content < 5%；
The additive is 1:(0.8-1.2 according to mass ratio by water-reducing agent, flocculant, enhancing component and modified alta-mud):
(4.5-5.5): (0.04-0.06) mixed preparing forms；
The enhancing component is 1:(0.4- according to mass ratio by triethanolamine, dimethyl silicone polymer and modified gangue powder
0.6): (1.2-1.5) mixed preparing forms.
By using above-mentioned technical proposal, the detailed catalogue modulus of CHARACTERISTICS OF TAILINGS SAND is small, and clay content is few, can be improved the strong of concrete
Degree makes CHARACTERISTICS OF TAILINGS SAND and flyash, stone, sand and slag powders form good gradation, is filled in concrete inner structure, drops
The porosity of low concrete increases concrete density, at the same the flyash and slag powders " shape effect " that has that add and
Slump-loss can be greatly reduced in " micro aggregate effect ", and it is negative to concrete slump loss bring to effectively eliminate CHARACTERISTICS OF TAILINGS SAND
Face is rung, can be with underwater mechanics to the dispersion resistance of concrete using the additive with anti-dispersion, increase compression strength
Performance is improved, and when concrete being made to construct under water, cement number of dropouts is reduced, and is not easy to disperse, and compression strength is preferable.
It is prepared in additive by using water-reducing agent, flocculant, enhancing component and modified alta-mud, water-reducing agent can
Flocculant increased water absorption when passing through water layer is reduced, the mobility of concrete is increased, improves concrete strength, flocculant energy
The cohesive strength for enough increasing concrete, improves the mobility of concrete, the compatibility between water-reducing agent and flocculant is good, bentone
Soil improves the intensity of concrete, and improve concrete mix sticks poly- property, improves the underwater anti-dispersibility of concrete.
Triethanolamine can improve the early strength of concrete in enhancing component, accelerate the hydration rate of cement in water, promote
Into the development of early strength of concrete, have the function of early powerful and water reducing and strength increasing, concrete early stage made to be not easy to disperse in water,
Dimethyl silicone polymer has defoaming function, facilitates the mobility for improving concrete mix, improves the intensity of concrete, disappear
Except flocculant is introduced into the bubble in concrete mix, air content is reduced, the activity of modified gangue powder is larger, can be improved mixed
Coagulate the compression strength of soil.
Further, the modified alta-mud is made of following methods: clay being added to the water, it is 5% that concentration, which is made,
Slurry heats 100-150mL suspension in 50-60 DEG C of water-bath, and being slowly added to 50-60mL concentration is 70-
The cetyl trimethylammonium bromide solution of 80g/L, high-speed stirred 1-1.5h are filtered, are washed with deionized water backwash, in 120-
It is dry at 130 DEG C, it is mixed by gains and with the silicon ash that its mass ratio is 1:0.7-0.9, and be ground to 100-120 mesh.
Bentonitic layer is made due to the modification by cetyl trimethylammonium bromide by using above-mentioned technical proposal
Spacing increases, and hydrophobicity significantly increases, thus disperse in water, mixed with silicon ash when avoidable bentonite condenses in water, energy
The aqueous dispersion resistance energy for enough improving mixture, increases the viscosity of concrete mix.
Further, the modified gangue powder is made of following methods: gangue being selected removal impurity, is soaked in water
After 2-3h, drying, being crushed to average grain diameter is 3.0-3.5 μm；1-1.5 parts of silane coupling agents are dissolved with 8-10 parts of water, 20- is added
25 parts of coal gangue powders, are stirred to react at 80-90 DEG C, wash, filter, dry at 110-120 DEG C, and modified gangue is made
Powder.
By using above-mentioned technical proposal, it is capable of forming chemical bond between coupling agent and coal gangue powder, makes coal gangue powder
Surface-active increases, and modified gangue partial size becomes smaller, and shape of particle is changed from original sheet to half elliptic, corner angle
Acuity reduces, and particle surface degree of roughness increases, and illustrates that coupling agent can be covered on the surface of gangue, makes gangue
Average grain diameter becomes smaller, and uniformity improves, and granule surface activity increases, and can be improved the intensity of concrete, improves the resistance to of concrete
Long property.
Further, the volume of the CHARACTERISTICS OF TAILINGS SAND is the 30-50% of sand volume, and the content of silica is in CHARACTERISTICS OF TAILINGS SAND
60-70%, the content of aluminum oxide are 12-24%, and the content of di-iron trioxide is 13-25%.
By using above-mentioned technical proposal, CHARACTERISTICS OF TAILINGS SAND content is suitable for avoiding CHARACTERISTICS OF TAILINGS SAND content more, caused slump damage
It loses larger.
Further, the flocculant is polyacrylamide, Sodium Polyacrylate, sodium lignin sulfonate, methacrylic acid two
One or more of methylamino ethyl ester.
By using above-mentioned technical proposal, polyacrylamide is dissolved in the chain-type compound generated after water and is filled in concrete
Internal voids, improve the compactness of concrete, to increase the cohesiveness of concrete, prevent concrete from dispersing in water, and poly- third
Olefin(e) acid sodium can make cement granules be uniformly dispersed, to improve concrete strength and stability；Sodium lignin sulfonate has very strong
Dispersibility, there is diminishing and humidification, dimethylaminoethyl methacrylate can increase the viscous of concrete mix
Poly- power, to improve its anti-dispersibility.
Further, the water-reducing agent is one of high-efficiency water-reducing agent of poly-carboxylic acid or naphthalene series high-efficiency water-reducing agent.
By using above-mentioned technical proposal, the water-reducing rate of high-efficiency water-reducing agent of poly-carboxylic acid is high, can significantly improve the morning of concrete
Phase intensity, while slump-loss is reduced, keep the working performance of concrete and cohesiveness good；Naphthalene series high-efficiency water-reducing agent can concrete
Initial slump improves, and has significant early strong, reinforcing effect to concrete, can improve the workability of concrete, improve coagulation
The mechanical property of soil reduces slump-loss.
Further, the flyash is II grades of flyash, density 1.95-2.35g/cm3, bulk density 0.63-
0.75g/cm3, loss on ignition 2-2.6%.
By using above-mentioned technical proposal, the active constituent of flyash is silica and aluminum oxide, with cement and
After water mixing, relatively stable cementitious material can be generated, to make concrete intensity with higher, while in flyash
70% or more particle is amorphous spherical glass body, primarily serves ball bearing effect, plays in concrete mix
Lubricating action, improves the workability of concrete mix, and flyash and sand, haydite etc. constitute rational gradation composition, make each other it
Between fill mutually, concrete density can be effectively increased, further increase the compression strength of concrete.
Further, the slag powders are S95 grade slag powder, and fluidity ratio is 95-100%, and 28d activity is 95-
105%, specific surface area 400-450m2/kg。
By using above-mentioned technical proposal, slag powders mineral admixture has " active effect ", " interfacial effect ", " micro- to fill out
Many comprehensive effects such as effect " and " diminishing effect ", the mineral admixtures such as slag powders can not only improve rheological property, reduce water
Change heat, reduce slump-loss, reduces isolation and bleeding, the pore structure and mechanical property of concrete structure can also be improved, mentioned
High later strength and durability.
Further, the stone is the continuous grading stone that partial size is 5-31.5mm, clay content 0.4-0.5%；Sand
The fineness modulus of son is 3.1-3.3, clay content 1.8-2.0%.
By using above-mentioned technical proposal, middle sand and partial size within the scope of the fineness modulus are 5-31.5mm continuous grading
Stone, help to increase the filling effect between each aggregate, the hole between component reduced, to improve the company between component
Compactness is connect, certain lubricating action is played, improves the workability of concrete, prevents concrete disintegration, increases coagulation after molding
The compression strength of soil.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that a kind of system of C30 tailing sand concrete
Preparation Method, comprising the following steps:
S1, CHARACTERISTICS OF TAILINGS SAND is calcined into 1-2h at 800-1450 DEG C, is cooled to room temperature；
S2, it CHARACTERISTICS OF TAILINGS SAND after cooling, sand, stone, cement, flyash and slag powders will be calcined will be added in blender, dry mixing 20-
30s；
S3, additive, dry mixing 20-30s is added；
S4, it adds water in the resulting dry blend of step S3, stirs 5-8min, C30 tailing sand concrete is made.
By using above-mentioned technical proposal, the compatibility by calcined CHARACTERISTICS OF TAILINGS SAND and flyash, slag powders is preferable, both
The working performance of concrete mix can be improved, and can guarantee the underwater 7 days compression strength of concrete and 28 days compression strength,
To increase the underwater anti-dispersibility and mechanical property of concrete.
In conclusion the invention has the following advantages:
The first, the concrete dispersed is not easy using preparations such as CHARACTERISTICS OF TAILINGS SAND, flyash and slag powders due to the present invention under water, is realized
The trans-utilization of CHARACTERISTICS OF TAILINGS SAND reduces its accumulating amount, gives full play to the due value in soil, reduces environmental pollution, at the same add by
Additive prepared by water-reducing agent, flocculant, enhancing component and modified alta-mud, the workability for improving concrete, anti-dispersion under water
Ability and mechanical property, since water-reducing agent can reduce the water absorption of concrete, flocculant can increase concrete viscosity, enhancing
Component can increase early strength, promote hydrated cementitious, gas introduction volume when flocculant is added be reduced, so that concrete be made to exist
Under water can rapid condensation, early strength is high, is not easy to disperse.
The second, preferably clay is modified using cetyl trimethylammonium bromide in the present invention, and mixes silicon ash system
The interlamellar spacing of standby modified alta-mud, clay increases, and hydrophobicity improves, and can increase the hydrophobic effect of concrete, to prevent concrete
Disperse in water, while after silicon ash and clay blending, the caking ability of cementitious material can be increased, improve anti-dispersion under concrete water
Performance and intensity.
Third, method of the invention increase CHARACTERISTICS OF TAILINGS SAND and slag powders, fine coal by the way that CHARACTERISTICS OF TAILINGS SAND is first carried out calcining and activating
The compatibility of ash, mixes CHARACTERISTICS OF TAILINGS SAND in concrete more uniform, improves the workability and compression strength of concrete, make coagulation
Soil is not easy to disperse in water.
Specific embodiment
Invention is further described in detail with reference to embodiments.
The preparation example 1-3 of modified gangue powder
Coal gangue powder is selected from Huainan, Anhui city and keeps watch hilllock coal preparation plant gangue in preparation example 1-3, and main component (wt%) is dioxy
SiClx 56.35, aluminum oxide 32.79, di-iron trioxide 5.85, calcium oxide 3.11, magnesia 1.18, silane coupling agent is selected from
The silane coupling agent for the model KH-550 that Henan Wei Chen chemical products Co., Ltd sells.
Preparation example 1: selecting removal impurity for gangue, be soaked in water after 2h, and drying, being crushed to average grain diameter is 3.0 μm；
1kg silane coupling agent is dissolved with 8kg water, 20kg coal gangue powder is added, is stirred to react at 80 DEG C, washs, filters, at 110 DEG C
Modified gangue powder is made in lower drying.
Preparation example 2: selecting removal impurity for gangue, and be soaked in water 2.5h, and drying, being crushed to average grain diameter is 3.3 μm；
1.3kg silane coupling agent is dissolved with 9kg water, 23kg coal gangue powder is added, is stirred to react at 85 DEG C, washs, filters, 115
It is dry at DEG C, modified gangue powder is made.
Preparation example 3: selecting removal impurity for gangue, and be soaked in water 3h, and drying, being crushed to average grain diameter is 3.5 μm；With
9kg water dissolves 1.5kg silane coupling agent, and 25kg coal gangue powder is added, is stirred to react at 90 DEG C, washs, filters, at 120 DEG C
Modified gangue powder is made in lower drying.
The preparation example 4-6 of modified alta-mud
Clay is selected from clay, the cetyl that the article No. that Lingshou County megalith mineral products processing factory sells is js-tt in preparation example 4-6
Trimethylammonium bromide, silicon ash are selected from the silicon ash that the article No. that Lingshou County Bai Sheng mineral products processing factory sells is 004.
Preparation example 4: clay is added to the water, and the slurry that concentration is 5% is made, by 100mL suspension at 50 DEG C
Water-bath in heat, be slowly added to 50mL concentration be 70g/L cetyl trimethylammonium bromide solution, high-speed stirred 1h, take out
Filter, is washed with deionized water backwash, dry at 120 DEG C, is mixed by gains and with the silicon ash that its mass ratio is 1:0.7, and grind
It is milled to 100 mesh.
Preparation example 5: clay is added to the water, and the slurry that concentration is 5% is made, by 130mL suspension at 55 DEG C
Water-bath in heat, be slowly added to 55mL concentration be 75g/L cetyl trimethylammonium bromide solution, high-speed stirred 1.3h,
It filters, is washed with deionized water backwash, it is dry at 125 DEG C, it is mixed by gains and with the silicon ash that its mass ratio is 1:0.8, and
It is ground to 110 mesh.
Preparation example 6: clay is added to the water, and the slurry that concentration is 5% is made, by 150mL suspension at 60 DEG C
Water-bath in heat, be slowly added to 60mL concentration be 80g/L cetyl trimethylammonium bromide solution, high-speed stirred 1.5h,
It filters, is washed with deionized water backwash, it is dry at 130 DEG C, it is mixed by gains and with the silicon ash that its mass ratio is 1:0.9, and
It is ground to 120 mesh.
Embodiment
High-efficiency water-reducing agent of poly-carboxylic acid is selected from the model that Langfang new industry chemical products sale Co., Ltd sells in embodiment 1-3
For 109 FDN-C of high-efficiency water-reducing agent of poly-carboxylic acid, naphthalene series high-efficiency water-reducing agent selected from the sale of Jinan mountain and sea Chemical Industry Science Co., Ltd
Type naphthalene series high-efficiency water-reducing agent, polyacrylamide are selected from poly- the third of the model PAM that Zi Kun Environmental Protection Technology Co., Ltd in Zhengzhou sells
Acrylamide, Sodium Polyacrylate be selected from Zhengzhou ten thousand fight chemical products Co., Ltd sale model 3047 Sodium Polyacrylate, wood
Quality sodium sulfonate is selected from the sodium lignin sulfonate that the article No. that An Guang Petroleum Technology Co., Ltd in Shandong sells is 353746, methyl-prop
Olefin(e) acid dimethylaminoethyl is selected from the methacrylic acid two that the article No. that Guangzhou San Wang chemical materials Co., Ltd sells is DMAEMA
Methylamino ethyl ester, triethanolamine are selected from the triethanolamine for the model OP-10 that prestige commerce and trade Co., Ltd, Tianjin Cigna sells, gather
Dimethyl siloxane is selected from the dimethyl silicone polymer for the KF-96-100 that Dongguan City Hua Yuekeming trade Co., Ltd sells.
Embodiment 1: a kind of C30 tailing sand concrete, raw material proportioning is as shown in table 1, the preparation method of the C30 CHARACTERISTICS OF TAILINGS SAND
The following steps are included:
S1, by 240kg/m3CHARACTERISTICS OF TAILINGS SAND calcines 1h at 800 DEG C, is cooled to room temperature, and the fineness modulus of CHARACTERISTICS OF TAILINGS SAND is 2.1, contains mud
< 5% is measured, the volume of CHARACTERISTICS OF TAILINGS SAND is the 30% of sand volume, and the content of silica is 60% in CHARACTERISTICS OF TAILINGS SAND, aluminum oxide
Content be 14%, the content of di-iron trioxide is 6%；
S2, CHARACTERISTICS OF TAILINGS SAND after cooling, 797kg/m will be calcined3Sand, 934kg/m3Stone, 260kg/m3Cement, 70kg/m3Fine coal
Ash and 80kg/m3Slag powders are added in blender, dry mixing 20s, and the fineness modulus of sand is 3.1, clay content 1.8%, stone
The continuous grading stone for being 5-31.5mm for partial size, clay content 0.4%, cement are P.O42.5 cement, and flyash is II grades of powder
Coal ash, density 1.95g/cm3, bulk density 0.63g/cm3, loss on ignition 2%, slag powders are S95 grade slag powder, flowing
Degree is 95% than being 95%, 28d activity, specific surface area 400m2/kg；
S3,8.36kg/m is added3Additive, dry mixing 20s, additive is by water-reducing agent, flocculant, enhancing component and modified alta-mud
It is formed according to the quality of 1:0.8:4.5:0.04 than mixed preparing, water-reducing agent is high-efficiency water-reducing agent of poly-carboxylic acid, and flocculant is poly- third
Acrylamide, enhancing component are mixed by triethanolamine, dimethyl silicone polymer and modified gangue powder according to the weight ratio of 1:0.4:1.2
Conjunction is formulated, and modified gangue powder is made of preparation example 1, and modified alta-mud is made of preparation example 4；
S4, by 200kg/m3Water is added in the resulting dry blend of step S3, stirs 5min, and C30 tailing sand concrete is made.
The raw material proportioning of C30 tailing sand concrete in 1 embodiment 1-3 of table
Embodiment 2: a kind of C30 tailing sand concrete, raw material proportioning is as shown in table 1, and the preparation method of the C30 CHARACTERISTICS OF TAILINGS SAND includes
Following steps:
S1, by 317kg/m3CHARACTERISTICS OF TAILINGS SAND calcines 1.5h at 1100 DEG C, is cooled to room temperature, and the fineness modulus of CHARACTERISTICS OF TAILINGS SAND is 2.2, contains
Mud amount < 5%, the volume of CHARACTERISTICS OF TAILINGS SAND are the 40% of sand volume, and the content of silica is 65% in CHARACTERISTICS OF TAILINGS SAND, three oxidations two
The content of aluminium is 10%, and the content of di-iron trioxide is 15%；
S2, CHARACTERISTICS OF TAILINGS SAND after cooling, 797kg/m will be calcined3Sand, 914kg/m3Stone, 270kg/m3Cement, 60kg/m3Fine coal
Ash and 70kg/m3Slag powders are added in blender, dry mixing 25s, and the fineness modulus of sand is 3.2, clay content 1.9%, stone
The continuous grading stone for being 5-31.5mm for partial size, clay content 0.45%, cement are P.O42.5 cement, and flyash is II grades
Flyash, density 2.15g/cm3, bulk density 0.7g/cm3, loss on ignition 2.3%, slag powders are S95 grade slag powder, stream
Dynamic degree is 100% than being 98%, 28d activity, specific surface area 430m2/kg；
S3,9.36kg/m is added3Additive, dry mixing 25s, additive is by water-reducing agent, flocculant, enhancing component and modified alta-mud
It being formed according to the quality of 1:1:5:0.05 than mixed preparing, water-reducing agent is naphthalene series high-efficiency water-reducing agent, and flocculant is Sodium Polyacrylate,
Enhance component by triethanolamine, dimethyl silicone polymer and modified gangue powder according to the weight ratio mixed preparing of 1:0.5:1.3
It forms, modified gangue powder is made of preparation example 2, and modified alta-mud is made of preparation example 5；
S4, by 180kg/m3Water is added in the resulting dry blend of step S3, stirs 6min, and C30 tailing sand concrete is made.
Embodiment 3: a kind of C30 tailing sand concrete, raw material proportioning is as shown in table 1, the preparation method of the C30 CHARACTERISTICS OF TAILINGS SAND
The following steps are included:
S1, by 370kg/m3CHARACTERISTICS OF TAILINGS SAND calcines 2h at 1450 DEG C, is cooled to room temperature, and the fineness modulus of CHARACTERISTICS OF TAILINGS SAND is 2.4, contains mud
< 5% is measured, the volume of CHARACTERISTICS OF TAILINGS SAND is the 50% of sand volume, and the content of silica is 70% in CHARACTERISTICS OF TAILINGS SAND, aluminum oxide
Content be 5%, the content of di-iron trioxide is 15%；
S2, CHARACTERISTICS OF TAILINGS SAND after cooling, 735kg/m will be calcined3Sand, 924kg/m3Stone, 250kg/m3Cement, 50kg/m3Fine coal
Ash and 60kg/m3Slag powders are added in blender, dry mixing 30s, and the fineness modulus of sand is 3.3, clay content 2.0%, stone
The continuous grading stone for being 5-31.5mm for partial size, clay content 0.5%, cement are P.O42.5 cement, and flyash is II grades of powder
Coal ash, density 2.35g/cm3, bulk density 0.75g/cm3, loss on ignition 2.6%, slag powders are S95 grade slag powder, stream
Dynamic degree is 105% than being 100%, 28d activity, specific surface area 450m2/kg；
S3,10.36kg/m is added3Additive, dry mixing 30s, additive is by water-reducing agent, flocculant, enhancing component and bentone
Soil is formed according to the quality of 1:1.2:5.5:0.06 than mixed preparing, and water-reducing agent is naphthalene series high-efficiency water-reducing agent, and flocculant is weight
Than the sodium lignin sulfonate and dimethylaminoethyl methacrylate for 1:1, enhance component by triethanolamine, polydimethylsiloxanes
Alkane and modified gangue powder are formed according to the weight ratio mixed preparing of 1:0.6:1.5, and modified gangue powder is made of preparation example 3,
Modified alta-mud is made of preparation example 6；
S4, by 190kg/m3Water is added in the resulting dry blend of step S3, stirs 8min, and C30 tailing sand concrete is made.
Comparative example
Comparative example 1: a kind of C30 tailing sand concrete, the difference from embodiment 1 is that, it is not added with additive.
Comparative example 2: a kind of C30 tailing sand concrete, the difference from embodiment 1 is that, it is swollen that modification is not added in additive
Profit soil.
Comparative example 3: a kind of C30 tailing sand concrete, the difference from embodiment 1 is that, enhancing group is not added in additive
Point.
Comparative example 4: a kind of C30 tailing sand concrete, the difference from embodiment 1 is that, the volume of CHARACTERISTICS OF TAILINGS SAND is mixed for sand
The 60% of amount.
Comparative example 5: it is prepared with embodiment 6 in the Chinese invention patent application file application No. is CN201310028238.0
A kind of Machine-made Sand anti-washout concrete as control, each component is by weight are as follows: cement 100, JS anti-dispersion under water
Agent 2, silicon ash 5, flyash 10, reinforcing agent 2, Machine-made Sand 145, rubble 149, water 37.6, reinforcing agent are calcium formate, underwater anti-dispersion
Agent is welan gum, polycarboxylic acids dehydragent and the Siloxane-Oxyalkylene Copolymers defoaming agent of 7:20:2.
Performance detection test
Concrete is prepared according to method in embodiment 1-3 and comparative example 1-5, and according to each of following detection method detection concrete
Item performance, testing result are recorded in table 2:
1, it the slump: is detected according to GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard "；
2, it compression strength: is detected according to GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete "；
3, it dispersion resistance energy: is detected according to DL/T5117-2000 " non-dispersible underwater concrete testing regulations ".
The concrete performance examination result of each embodiment of table 2 and the preparation of each comparative example
According to the slump-loss of the C30 tailing sand concrete of embodiment 1-3 preparation 2.9% it can be seen from data in table 2
Within, slump-loss is smaller, and 7 days land and water intensity ratios of embodiment 1-3 preparation are in 87.6-88.8%, 28 days land and water intensity
Than in 90-91.3%, cement number of dropouts illustrates that the concrete of embodiment 1-3 preparation has good anti-point within 0.83%
Performance and mechanical property are dissipated, while little loss of slump, workability are preferable.
Comparative example 1 is because being not added with the additive with dispersion resistance energy, Control Measures for Concrete Slump prepared by comparative example 1 in concrete
Degree loss is 35mm, and 7 days land and water compressive strength rates are 70.2%, and 28 days compressive strength rates are 72.2%, with embodiment 1-3 phase
Than land and water compressive strength rate significantly increases, and cement number of dropouts is 2.53%, and number of dropouts is larger, illustrates to add additive, can
Making concrete under water has preferable mechanical property and working performance.
Comparative example 2 is to be not added with enhancing in additive because being not added with modified alta-mud, comparative example 3 in concrete in additive
Component, it can be seen from the test results that, compared with the concrete of embodiment 1-3 preparation, comparative example 2 and comparative example 3 are prepared mixed
Compression strength reduces solidifying soil in water, and land and water compressive strength rate reduces, and cement number of dropouts significantly increases, and illustrates to add bentone
Soil and enhancing component can enable the dispersion resistance of concrete get a promotion.
The volume of CHARACTERISTICS OF TAILINGS SAND is the 60% of sand volume in comparative example 4, and CHARACTERISTICS OF TAILINGS SAND volume is larger, the mobility of concrete compared with
Difference, slump-loss obviously become larger, and underwater compression strength reduces, and land and water compression strength is smaller, illustrates CHARACTERISTICS OF TAILINGS SAND volume mistake
Greatly, Yi Yinqi concrete slump loss is larger, and dispersion resistance can reduce.
Comparative example 5 is the anti-dispersion concrete of prior art preparation, the concrete phase with 1-3 of embodiment of the present invention preparation
Smaller than concrete land and water compressive strength rate prepared by, comparative example 5, cement number of dropouts is big, illustrate concrete prepared by the present invention and
Easy property and dispersion resistance can be good.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of C30 tailing sand concrete, which is characterized in that comprise the following components in parts by weight: 250-270 parts of cement, 735-
797 parts of sands, 240-370 parts of CHARACTERISTICS OF TAILINGS SANDs, 914-934 parts of stones, 180-200 parts of water, 50-70 parts of flyash, 60-80 parts of slags
Powder, 8.36-9.36 part additive；
The fineness modulus of the CHARACTERISTICS OF TAILINGS SAND is 2.1-2.3, clay content < 5%；
The additive is 1:(0.8-1.2 according to mass ratio by water-reducing agent, flocculant, enhancing component and modified alta-mud):
(4.5-5.5): (0.04-0.06) mixed preparing forms；
The enhancing component is 1:(0.4- according to mass ratio by triethanolamine, dimethyl silicone polymer and modified gangue powder
0.6): (1.2-1.5) mixed preparing forms.
2. C30 tailing sand concrete according to claim 1, which is characterized in that the modified alta-mud is by following methods
It is made: clay is added to the water, the slurry that concentration is 5%, the water-bath by 100-150mL suspension at 50-60 DEG C is made
Middle heating is slowly added to the cetyl trimethylammonium bromide solution that 50-60mL concentration is 70-80g/L, high-speed stirred 1-
1.5h is filtered, is washed with deionized water backwash, dry at 120-130 DEG C, is 1:0.7-0.9 by gains and with its mass ratio
Silicon ash mixing, and be ground to 100-120 mesh.
3. C30 tailing sand concrete according to claim 1, which is characterized in that the modified gangue powder is by with lower section
Method is made: gangue being selected removal impurity, is soaked in water after 2-3h, drying, being crushed to average grain diameter is 3.0-3.5 μm；With
8-10 parts of water dissolve 1-1.5 parts of silane coupling agents, and 20-25 parts of coal gangue powders are added, is stirred to react at 80-90 DEG C, washs, takes out
Filter, it is dry at 110-120 DEG C, modified gangue powder is made.
4. C30 tailing sand concrete according to claim 1, which is characterized in that the volume of the CHARACTERISTICS OF TAILINGS SAND is mixed for sand
The 30-50% of amount, the content of silica is 60-70% in CHARACTERISTICS OF TAILINGS SAND, and the content of aluminum oxide is 2-14%, di-iron trioxide
Content be 3-15%.
5. C30 tailing sand concrete according to claim 1, which is characterized in that the flocculant is polyacrylamide, gathers
One or more of sodium acrylate, sodium lignin sulfonate, dimethylaminoethyl methacrylate.
6. C30 tailing sand concrete according to claim 1, which is characterized in that the water-reducing agent is that polycarboxylic acids efficiently subtracts
One of aqua or naphthalene series high-efficiency water-reducing agent.
7. C30 tailing sand concrete according to claim 1, which is characterized in that the flyash is II grades of flyash, close
Degree is 1.95-2.35g/cm3, bulk density 0.63-0.75g/cm3, loss on ignition 2-2.6%.
8. C30 tailing sand concrete according to claim 1, which is characterized in that the slag powders are S95 grade slag powder,
Fluidity ratio is 95-100%, and 28d activity is 95-105%, specific surface area 400-450m2/kg。
9. C30 tailing sand concrete according to claim 1, which is characterized in that the stone is that partial size is 5-31.5mm
Continuous grading stone, clay content 0.4-0.5%；The fineness modulus of sand is 3.1-3.3, clay content 1.8-2.0%.
10. a kind of preparation method of -9 described in any item C30 tailing sand concretes according to claim 1, which is characterized in that packet
Include following steps:
S1, CHARACTERISTICS OF TAILINGS SAND is calcined into 1-2h at 800-1450 DEG C, is cooled to room temperature；
S2, it CHARACTERISTICS OF TAILINGS SAND after cooling, sand, stone, cement, flyash and slag powders will be calcined will be added in blender, dry mixing 20-
30s；
S3, additive, dry mixing 20-30s is added；
S4, it adds water in the resulting dry blend of step S3, stirs 5-8min, C30 tailing sand concrete is made.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110698098A (en) * | 2019-09-25 | 2020-01-17 | 中建西部建设北方有限公司 | Corrosion-resistant iron tailing aggregate, corrosion-resistant concrete and preparation method thereof |
| CN110937865A (en) * | 2019-11-26 | 2020-03-31 | 青岛汇鑫混凝土有限公司 | C30 recycled aggregate concrete and preparation method thereof |
| CN111003971A (en) * | 2019-09-30 | 2020-04-14 | 上海晶阳商品混凝土有限公司 | Low-slump loss concrete and preparation method thereof |
| CN112309514A (en) * | 2020-11-04 | 2021-02-02 | 广东长大试验技术开发有限公司 | Mountain sand concrete mix proportion design method with fluctuating mud content |
| CN112374812A (en) * | 2020-11-10 | 2021-02-19 | 四川省铁证工程检测有限公司 | High-calcium fly ash concrete and preparation method thereof |
| CN112694300A (en) * | 2021-02-05 | 2021-04-23 | 西安高科新达混凝土有限责任公司 | Iron tailing concrete and preparation method thereof |
| CN112745049A (en) * | 2021-01-07 | 2021-05-04 | 中建西部建设建材科学研究院有限公司 | Coal gangue-based admixture and preparation method thereof |
| CN112939528A (en) * | 2021-01-23 | 2021-06-11 | 广州市鸿磊混凝土有限公司 | Underwater low-bleeding concrete and preparation method thereof |
| CN113264701A (en) * | 2021-04-20 | 2021-08-17 | 南华大学 | Coal gangue powder used as pumping concrete admixture and preparation method and application thereof |
| CN113773014A (en) * | 2021-08-31 | 2021-12-10 | 中建西部建设北方有限公司 | Gold tailing concrete and preparation method thereof |
| CN114671637A (en) * | 2022-02-28 | 2022-06-28 | 中国矿业大学 | Preparation method of high-performance concrete containing coal gangue |
| CN114751672A (en) * | 2022-04-11 | 2022-07-15 | 中建西部建设湖南有限公司 | Concrete underwater non-dispersant, preparation method and application thereof |
| CN115259735A (en) * | 2022-07-14 | 2022-11-01 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
| CN115650675A (en) * | 2022-11-04 | 2023-01-31 | 科之杰新材料集团福建有限公司 | Wet-mixed mortar and preparation method thereof |
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| CN110698098A (en) * | 2019-09-25 | 2020-01-17 | 中建西部建设北方有限公司 | Corrosion-resistant iron tailing aggregate, corrosion-resistant concrete and preparation method thereof |
| CN111003971A (en) * | 2019-09-30 | 2020-04-14 | 上海晶阳商品混凝土有限公司 | Low-slump loss concrete and preparation method thereof |
| CN110937865A (en) * | 2019-11-26 | 2020-03-31 | 青岛汇鑫混凝土有限公司 | C30 recycled aggregate concrete and preparation method thereof |
| CN112309514B (en) * | 2020-11-04 | 2022-03-18 | 广东长大试验技术开发有限公司 | Mountain sand concrete mix proportion design method with fluctuating mud content |
| CN112309514A (en) * | 2020-11-04 | 2021-02-02 | 广东长大试验技术开发有限公司 | Mountain sand concrete mix proportion design method with fluctuating mud content |
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| CN112745049A (en) * | 2021-01-07 | 2021-05-04 | 中建西部建设建材科学研究院有限公司 | Coal gangue-based admixture and preparation method thereof |
| CN112939528A (en) * | 2021-01-23 | 2021-06-11 | 广州市鸿磊混凝土有限公司 | Underwater low-bleeding concrete and preparation method thereof |
| CN112694300A (en) * | 2021-02-05 | 2021-04-23 | 西安高科新达混凝土有限责任公司 | Iron tailing concrete and preparation method thereof |
| CN113264701A (en) * | 2021-04-20 | 2021-08-17 | 南华大学 | Coal gangue powder used as pumping concrete admixture and preparation method and application thereof |
| CN113773014A (en) * | 2021-08-31 | 2021-12-10 | 中建西部建设北方有限公司 | Gold tailing concrete and preparation method thereof |
| CN114671637A (en) * | 2022-02-28 | 2022-06-28 | 中国矿业大学 | Preparation method of high-performance concrete containing coal gangue |
| CN114751672A (en) * | 2022-04-11 | 2022-07-15 | 中建西部建设湖南有限公司 | Concrete underwater non-dispersant, preparation method and application thereof |
| CN115259735A (en) * | 2022-07-14 | 2022-11-01 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
| CN115259735B (en) * | 2022-07-14 | 2023-08-11 | 武汉三源特种建材有限责任公司 | Viscosity-reducing phase-change material for concrete and preparation method and application thereof |
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