CN109503074A - A kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND - Google Patents
A kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND Download PDFInfo
- Publication number
- CN109503074A CN109503074A CN201811492484.0A CN201811492484A CN109503074A CN 109503074 A CN109503074 A CN 109503074A CN 201811492484 A CN201811492484 A CN 201811492484A CN 109503074 A CN109503074 A CN 109503074A
- Authority
- CN
- China
- Prior art keywords
- tailings sand
- self
- mineral aggregate
- leveling concrete
- rubber material
- 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.)
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
-
- 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
Abstract
The invention belongs to obsolete material recycle utilization technology fields, more particularly to a kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND, the self-leveling concrete includes: mineral aggregate 30~40%, phosphorus CHARACTERISTICS OF TAILINGS SAND 25~35%, gel rubber material 20~25%, water 5~10%, outer-penetrating agent 0.2~5.75%, and the percentage composition is mass percent；Wherein, the gel rubber material includes cement 60~70%, iron tailings sand 15~20%, flyash 10~20%, and the percentage composition is mass percent；The present invention replaces river sand using phosphorus CHARACTERISTICS OF TAILINGS SAND, and flyash and iron tailings sand replace powder to carry out the hole of filling concrete slurry, realizes Industry Waste rejected material resource utilization, protect environment, reduce the production cost of self-leveling concrete；Flyash reacts with aluminium oxide, silica isoreactivity ingredient and the hydrated product of cement and lime in iron tailings sand, to be filled with the hole of cement slurry, accelerates hydrated cementitious rate, improves concrete density and early strength.
Description
Technical field
The invention belongs to obsolete material recycle utilization technology fields, and in particular to a kind of Self-leveling coagulation for mixing CHARACTERISTICS OF TAILINGS SAND
Soil.
Background technique
For tailing as a kind of trade waste, the accumulative volume of cargo in storage in China has surpassed 60,000,000,000 tons, and annual also with 1,600,000,000
Ton surprising speed increase, however the comprehensive utilization ratio of CHARACTERISTICS OF TAILINGS SAND but only have 18.9%, the tailing not utilized largely still with
Stacking states exist, and the stockpiling of tailing can occupy a large amount of soils, pollute ambient enviroment and underground water, bring to the life of the mankind
Pollution, causes destruction to environment.With the fast development that Chinese Urbanization is built, to the utilization of natural resources all with day
Increase, the transition exploitation of natural sand stone destroys the balance of ecological environment, and national regulations have forbidden exploiting natural sand, while part saves
Part has also started the limitation exploited to natural stone, or even has area to forbid cutting into a mountain for quarrying.Therefore, the substitution of natural sand stone is found
Product, rationally using Industry Waste rejected material then at hot research direction in recent years.
Self-leveling concrete is formed by combination of raw materials such as cement, coarse-fine aggregate, miberal powder, swelling agent, additive, water,
Its mobility is big, cohesiveness is strong, has certain micro-expansibility, concrete can occur voluntarily to flow under the effect of gravity
It is dynamic, phenomena such as without aggregate separated and bleeding, isolation.As a kind of high performance concrete, self-leveling concrete usually quilt
As seam connecting material, component grouting material, bridge strengthening service material etc..Currently, self-leveling concrete is used extensively
In highway engineering, railway engineering and architectural engineering.However, prepare sandstone material and outer-penetrating agent needed for self-leveling concrete compared with
More, sandstone material is in short supply to cause the self-leveling concrete cost of raw material gradually to rise, and material cost problem seriously limits it and pushes away
Wide application.Therefore, sandstone material substitute in a kind of self-leveling concrete based on performance boost is found, is current urgently to be resolved
Problem.
Summary of the invention
The purpose of the present invention is to provide a kind of self-leveling concretes for mixing CHARACTERISTICS OF TAILINGS SAND, according to the spy of CHARACTERISTICS OF TAILINGS SAND raw material
Property, the material property advantage that plays is adjusted by proportion, a kind of self-leveling concrete with excellent performance is prepared, and realizes work
Industry dead meal recycling recycles.
To achieve the goals above, the present invention is achieved by the following scheme:
A kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND, the self-leveling concrete include: mineral aggregate 30~40%, phosphorus tailing
Sand 25~35%, gel rubber material 20~25%, water 5~10%, outer-penetrating agent 0.2~5.75%, the percentage composition are quality hundred
Score；
Wherein, the gel rubber material includes cement 60~70%, iron tailings sand 15~20%, flyash 10~20%,
The percentage composition is mass percent.
In further technical solution, the mineral aggregate include small particle mineral aggregate 10~20%, medium grain size mineral aggregate 35~
45%, big partial size mineral aggregate 40~50%, the percentage composition are mass percent；
The partial size of the small particle mineral aggregate is d1, and 5mm≤d1< 10mm；
The partial size of the medium grain size mineral aggregate is d2, and 10mm≤d2< 16mm；
The partial size of the big partial size mineral aggregate is d3, and 16mm≤d3< 20mm.
In further technical solution, the partial size of the iron tailings sand is less than 1.18mm, and partial size is less than 0.075mm's
Content is not less than the 70% of iron tailings sand content.
In further technical solution, the partial size of the phosphorus CHARACTERISTICS OF TAILINGS SAND is less than 4.75mm, and partial size 0.15mm~
Content between 1.18mm is not less than the 65% of phosphorus CHARACTERISTICS OF TAILINGS SAND content.
In further technical solution, component volume is calculated according to following formula in the self-leveling concrete:
mg=Vg·ρg；
mm1=mb·β1；
mm2=mb·β2；
mc=mb-mm1-mm2；
Wherein:
mgFor mineral aggregate quality；ρgFor mineral aggregate apparent density；VgFor mineral aggregate volume；msFor phosphorus CHARACTERISTICS OF TAILINGS SAND quality；ρsFor phosphorus tailing
Sand apparent density；mwFor the quality of water；ρbFor gel rubber material integral density；mbFor the quality of gel rubber material；ρcFor the apparent of cement
Density；mcFor cement quality；ρm1、ρm2Respectively flyash, iron tailings sand apparent density；β1、β2Respectively flyash, iron tailings
Sand accounts for gel rubber material mass ratio；fceFor cement 28d compression strength；ρwFor the apparent density of water；fcu,0For concrete 28d pressure resistance
Degree；m1、m2Respectively flyash, iron tailings chiltern amount；
In further technical solution, the outer-penetrating agent is in water-reducing agent, defoaming agent, dicalcium powder, air entraining agent
One or more kinds of combinations.
According to the present invention, outer-penetrating agent used in the present invention is common by those skilled in the art, and the present invention does not do this
Particularity limits.
In further technical solution, the outer-penetrating agent includes the diminishing for accounting for gel rubber material gross mass 1.5~2%
Agent accounts for the defoaming agent of gel rubber material gross mass 1~1.5%, accounts for the dicalcium powder of gel rubber material gross mass 13~18%, accounts for gel material
Expect the air entraining agent of gross mass 1~1.5%.
Compared with prior art, the present invention has following technical effect that
1, self-leveling concrete provided by the invention replaces river sand using phosphorus CHARACTERISTICS OF TAILINGS SAND, and flyash and iron tailings sand replace
Powder carrys out the hole of filling concrete slurry, realizes Industry Waste rejected material resource utilization, protects environment, and it is mixed to reduce Self-leveling
Coagulate the production cost of soil；
2, in the present invention, aluminium oxide, silica isoreactivity ingredient and cement and lime in flyash and iron tailings sand
Hydrated product reacts, to be filled with the hole of cement slurry, accelerates hydrated cementitious rate, improves concrete compaction
Degree and early strength；
3, mineral aggregate is divided into the third gear of different-grain diameter by self-leveling concrete provided by the invention, by controlling each shelves collection
The mixture proportion of material adjusts mineral aggregate formate gradation composition, improves the performance of self-leveling concrete, and can want according to self performance
It asks, by the adjustment of each gear mineral aggregate mixture proportion, realizes the controllable of self-leveling concrete performance；
4, self-leveling concrete provided by the invention is made from performance requirement angle using flyash and the mixing of iron tailings sand
For partial gel material, and its relationship between gel coefficient is established, mass parameter foundation is selected to mix CHARACTERISTICS OF TAILINGS SAND Self-leveling coagulation
Each component calculated relationship in soil, thus effectively promoted self-leveling concrete performance, for self-leveling concrete preparation provide it is larger
It is convenient.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is furture elucidated.
All raw materials in the present invention, are not particularly limited its source, buying on the market or according to this field skill
The preparation of conventional method known to art personnel.
All raw materials in the present invention, are not particularly limited its purity, and present invention preferably employs analyze pure or composite wood
The conventional purity that material field uses.
Embodiment 1
Select below iron tailings sand, phosphorus tailing, cement, flyash and outer-penetrating agent preparation intensity be one cube of C40 from
Air-free concrete, using rubble as mineral aggregate.The apparent density of raw material is as shown in table 1.
Table 1: raw material apparent density
| Material | Apparent density (kg/m3) |
| Rubble (mineral aggregate) | 3000 |
| Phosphorus charACTERISTICS OF TAILINGS SAND | 2800 |
| Flyash | 2800 |
| Iron tailings sand | 3000 |
| Cement | 3000 |
It is 42.5 ordinary portland cements that mixture, which is prepared, using cement, and every cubic meter of concrete medium stone volume takes
0.3m3, rubble quality:
mg=Vg·ρg=0.3 × 3000kg=900kg
Wherein, partial size d3For 16mm≤d3The big Stone of < 20mm accounts for the 50% of rubble gross mass, quality are as follows:
mg1=0.5mg=0.5 × 900kg=450kg
Partial size d2For 10mm≤d2The medium grain size rubble of < 16mm accounts for the 40% of rubble gross mass, quality are as follows:
mg2=0.4mg=0.4 × 900kg=360kg
Partial size d1For 5mm≤d1The small particle rubble of < 10mm accounts for the 10% of rubble gross mass, quality are as follows:
mg3=0.1mg=0.1 × 900kg=90kg
The quality of phosphorus CHARACTERISTICS OF TAILINGS SAND:
Flyash accounts for gel rubber material β1It is 12%, iron tailings sand accounts for gel rubber material mass ratio β2It is 8%, gel rubber material density
It calculates as follows:
Referring to f in " self-compacting concrete application technology regulation " (JGJ/T 283-2012)ceAnd fcu,0Determination method, water
Glue is as follows than calculating:
Gel rubber material quality:
The quality of flyash:
mm1=mb·β1=554.4 × 0.12kg=66kg
The quality of iron tailings sand:
mm2=mb·β2=554.4 × 0.08kg=44kg
The quality of cement:
mc=mb-mm1-mm2=(554.4-66.528-44.352) kg=444kg
The quality of water:
mw=mb·mw/mb=554.4 × 0.36kg=200kg
Final preparation C40 self-compacting concrete formula is as shown in table 2 below.
Each component quality needed for table 2 prepares one cube of C40 self-compacting concrete
| Material | Every side's concrete consumes quality (Kg) |
| Rubble (16mm≤d3< 20mm) | 450 |
| Rubble (10mm≤d2< 16mm) | 360 |
| Rubble (5mm≤d1< 10mm) | 90 |
| 42.5 ordinary portland cements | 444 |
| Phosphorus charACTERISTICS OF TAILINGS SAND | 823 |
| Iron tailings sand | 44 |
| Flyash | 66 |
| Water | 200 |
| Water-reducing agent | 8.32 |
| Defoaming agent | 5.45 |
| Dicalcium powder | 81.6 |
| Air entraining agent | 5.45 |
Embodiment 2
As embodiment 1 provide the self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND, unlike, in this embodiment:
Partial size d3 is that the big Stone of 16mm≤d3 < 20mm accounts for the 40% of rubble gross mass；
Partial size d2 is that the medium grain size rubble of 10mm≤d2 < 16mm accounts for the 40% of rubble gross mass；
Partial size d1 is that the small particle rubble of 5mm≤d1 < 10mm accounts for the 20% of rubble gross mass；
Remaining is constant, final to prepare C40 self-compacting concrete formula as shown in table 3 below.
Each component quality needed for table 3 prepares one cube of C40 self-compacting concrete
| Material | Every side's concrete consumes quality (Kg) |
| Rubble (16mm≤d3< 20mm) | 360 |
| Rubble (10mm≤d2< 16mm) | 360 |
| Rubble (5mm≤d1< 10mm) | 180 |
| 42.5 ordinary portland cements | 444 |
| Phosphorus charACTERISTICS OF TAILINGS SAND | 823 |
| Iron tailings sand | 44 |
| Flyash | 66 |
| Water | 200 |
| Water-reducing agent | 8.32 |
| Defoaming agent | 5.45 |
| Dicalcium powder | 81.6 |
| Air entraining agent | 5.45 |
Comparative example 1
Each component quality needed for traditional one cube of C40 self-compacting concrete of preparation is as shown in table 4 below.
Table 4:
The performance for the concrete that test above-described embodiment 1-2, comparative example 1 provide, test data are as shown in table 5.
Table 5:
| Initial extension degree/mm | Compression strength/MPa for 24 hours | 3d compression strength/MPa | |
| Embodiment 1 | 850 | 35 | 48 |
| Embodiment 2 | 820 | 32 | 45 |
| Comparative example 1 | 615 | 22 | 32 |
In conjunction with above-mentioned test data it can be seen that
Self-leveling concrete provided by the invention replaces traditional river sand by doping phosphorus CHARACTERISTICS OF TAILINGS SAND, with flyash and iron
CHARACTERISTICS OF TAILINGS SAND replaces traditional powder, realizes the resource utilization of Industry Waste rejected material, not only protects environment, reduces gravity flow
The production cost of flat concrete also improves the compactness and early strength of concrete, has preferable application prospect.
Basic principles and main features and the features of the present invention of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement is both fallen in the range of claimed invention.The scope of protection of present invention is by appended claims
And its equivalent thereof.
Claims (7)
1. a kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND, it is characterised in that: the self-leveling concrete include: mineral aggregate 30~
40%, phosphorus CHARACTERISTICS OF TAILINGS SAND 25~35%, gel rubber material 20~25%, water 5~10%, outer-penetrating agent 0.2~5.75%, the percentage contain
Amount is mass percent；
Wherein, the gel rubber material includes cement 60~70%, iron tailings sand 15~20%, flyash 10~20%, described
Percentage composition is mass percent.
2. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein the mineral aggregate includes small particle mineral aggregate 10
~20%, medium grain size mineral aggregate 35~45%, big partial size mineral aggregate 40~50%, the percentage composition are mass percent；
The partial size of the small particle mineral aggregate is d1, and 5mm≤d1< 10mm；
The partial size of the medium grain size mineral aggregate is d2, and 10mm≤d2< 16mm；
The partial size of the big partial size mineral aggregate is d3, and 16mm≤d3< 20mm.
3. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein the partial size of the iron tailings sand is less than
1.18mm, and content of the partial size less than 0.075mm is not less than the 70% of iron tailings sand content.
4. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein the partial size of the phosphorus CHARACTERISTICS OF TAILINGS SAND is less than
4.75mm, and content of the partial size between 0.15mm~1.18mm is not less than the 65% of phosphorus CHARACTERISTICS OF TAILINGS SAND content.
5. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein component is mixed in the self-leveling concrete
Amount is calculated according to following formula:
mg=Vg·ρg；
mm1=mb·β1；
mm2=mb·β2；
mc=mb-mm1-mm2；
Wherein:
mgFor mineral aggregate quality；ρgFor mineral aggregate apparent density；VgFor mineral aggregate volume；msFor phosphorus CHARACTERISTICS OF TAILINGS SAND quality；ρsFor phosphorus CHARACTERISTICS OF TAILINGS SAND table
See density；mwFor the quality of water；ρbFor gel rubber material integral density；mbFor the quality of gel rubber material；ρcFor the apparent close of cement
Degree；mcFor cement quality；ρm1、ρm2Respectively flyash, iron tailings sand apparent density；β1、β2Respectively flyash, iron tailings sand
Account for gel rubber material mass ratio；fceFor cement 28d compression strength；ρwFor the apparent density of water；fcu,0For concrete 28d pressure resistance
Degree；m1、m2Respectively flyash, iron tailings chiltern amount.
6. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein the outer-penetrating agent be selected from water-reducing agent,
One of defoaming agent, dicalcium powder, air entraining agent or more than one combination.
7. the self-leveling concrete according to claim 1 for mixing CHARACTERISTICS OF TAILINGS SAND, wherein the outer-penetrating agent includes accounting for gel material
The water-reducing agent for expecting gross mass 1.5~2%, accounts for the defoaming agent of gel rubber material gross mass 1~1.5%, accounts for gel rubber material gross mass 13
~18% dicalcium powder accounts for the air entraining agent of gel rubber material gross mass 1~1.5%.
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| CN201811492484.0A CN109503074A (en) | 2018-12-07 | 2018-12-07 | A kind of self-leveling concrete for mixing CHARACTERISTICS OF TAILINGS SAND |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111831961A (en) * | 2020-07-30 | 2020-10-27 | 山东大学 | Cement dose estimation method and system for skeleton compact type cement stabilized macadam |
| CN113477664A (en) * | 2021-06-30 | 2021-10-08 | 山东扶尧生态科技有限公司 | Remote pumping self-leveling field building method for dense tailing slurry |
| CN113845348A (en) * | 2021-10-27 | 2021-12-28 | 嘉华特种水泥股份有限公司 | Iron tailing light phase-change concrete and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111831961A (en) * | 2020-07-30 | 2020-10-27 | 山东大学 | Cement dose estimation method and system for skeleton compact type cement stabilized macadam |
| CN113477664A (en) * | 2021-06-30 | 2021-10-08 | 山东扶尧生态科技有限公司 | Remote pumping self-leveling field building method for dense tailing slurry |
| CN113477664B (en) * | 2021-06-30 | 2023-02-07 | 山东扶尧生态科技有限公司 | Remote pumping self-leveling field building method for dense tailing slurry |
| CN113845348A (en) * | 2021-10-27 | 2021-12-28 | 嘉华特种水泥股份有限公司 | Iron tailing light phase-change concrete and preparation method thereof |
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