CN106316248A - Low autogenous shrinkage, high-strength concrete prepared from waste pulp in concrete-mixing station - Google Patents
Low autogenous shrinkage, high-strength concrete prepared from waste pulp in concrete-mixing station Download PDFInfo
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- CN106316248A CN106316248A CN201610657587.2A CN201610657587A CN106316248A CN 106316248 A CN106316248 A CN 106316248A CN 201610657587 A CN201610657587 A CN 201610657587A CN 106316248 A CN106316248 A CN 106316248A
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- concrete
- mixing plant
- concrete mixing
- strength
- constriction
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Classifications
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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
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
-
- 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
Abstract
Provided is low autogenous shrinkage, high-strength concrete prepared from the waste pulp in concrete-mixing station. The concrete is a blended composition of 300-340 parts of cement, 90-130 parts of lithium slag, 70-110 parts of waste pulp from a concrete-mixing station, 696-739 parts of river sand, 1044-1109 parts of crushed stone, 8.5-10 parts of shrinkage reducing agent, 4-6 parts of water reducing agent and 80-92 parts of water. The 7d autogenous shrinkage value of the low autogenous shrinkage, high-strength concrete prepared from the waste pulp in concrete-mixing station, is <=80*10<-6>, the 28d autogenous shrinkage value is <=100*10<-6>, approaching stability. The lithium slag and shrinkage-reducing agent compositions adopted by present invention is good for lowering autogenous shrinkage; the compatibility with waste pulp is good. The roles and functions are different and achieve superposition effects, effectively lowering the autogenous shrinkage of high-strength concrete prepared from the waste pulp in concrete-mixing station.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of low self-constriction high-strength concrete (C60 and more than), can
Effectively reduction uses concrete mixing plant to give up and starches the self-constriction of the high-strength concrete prepared.
Background technology
Concrete material is still the construction material that usage amount is maximum, use face is the widest, predominantly concrete mixing plant at present
Preparation produces, and inevitably results from a large amount of waste water, useless slurry and waste residue.According to statistics, along with the continuous expansion of capital construction scale
Greatly, the annual production of China's concrete has exceeded 1,500,000,000 m3, and often produce 1m3Concrete averagely produces waste water 0.03 ton, it means that
The Concrete Mixing Station of China to produce about 0.5 hundred million tons of waste water every year, containing a certain amount of cement components in waste water,
Typically there is strong basicity (pH value is up to more than 13), be directly discharged in periphery natural environment, to Binder Materials and water resource be
One is greatly wasted, and what is more important can bring huge environmental pollution, as polluted clean underground water source, in waste water
Solid particle alluvial blocking sewer, forms new waste residue etc., greatly affects holding of concrete mixing plant enterprise after hardening
Supervention exhibition.
The most effectively disposing these waste water is that current concrete mixing plant enterprise is concerned about and one of thorny thing the most.?
There are some researches show, can be used for preparing concrete by concrete mixing plant waste water, and be applied in some Practical Projects.For
Improve the utilization ratio of concrete mixing plant waste water, waste water is carried out stratified sedimentation, form useless slurry, round concrete mixing plant
Useless slurry is prepared concrete and has been carried out a lot of work, achieves a series of useful achievement, and prepares strong concrete (C60
More than and).Along with correlational study persistently deeply, concrete mixing plant gives up, and also to present some bright for the high-strength concrete of slurry preparation
Aobvious technological deficiency, such as self-constriction is excessive, easily causes high-strength concrete early-age crack, significantly limit its engineering and uses
Scope.
Concrete self-shrinkage refers to the linear deformation that concrete causes under air-proof condition because of internal self-desiccation, and it is at low water
Become apparent from the case of glue ratio, have essential distinction with concrete drying shrinkage.Concrete self-shrinkage has become high-strength concrete
Principal mode in contraction distortion.Concrete mixing plant gives up and starches the reason that the high-strength concrete self-constriction prepared is bigger, mainly exists
Higher in the pH value of useless slurry, higher alkaline environment certainly will increase concrete self-shrinkage, simultaneously because useless slurry active effect is relatively low,
Preparing high-strength concrete for guarantee, its consumption is generally large, thereby increases gel material content, thus adds high-strength coagulation
Soil self-constriction.Merely use the technology reducing normal concrete self-constriction, as mixed economization agent and extender simply, it is difficult to
Effectively solution concrete mixing plant gives up and starches the technical barrier that the high-strength concrete self-constriction prepared is excessive, and its particularity is: one
Aspect, the solid concentration in useless slurry, plus cement and mineral admixture consumption, causes its gelling when preparing high-strength concrete
Material usage is relatively big, certainly will increase self-constriction；On the one hand, containing a lot of aniones, cation and some residuals in useless slurry
Additive, ion component is complicated, and some is conducive to increasing self-constriction, and some advantageously reduces self-constriction, it is even more important that by
This relatively high alkalinity environmental benefits produced is in increasing self-constriction.In the case of solving low water binder ratio, concrete mixing plant useless slurry system
The technical barrier that standby high-strength concrete self-constriction is excessive, it is necessary to its ion component is carried out statistical analysis, finds out compatible
The preferable additive of property and mineral admixture, and reduce gel material content.This problem ground solves to stir at existing concrete
Mix in the concrete of station useless slurry preparation and have no report.
Summary of the invention
Concrete mixing plant has been used to give up the higher deficiency of self-constriction of high-strength concrete of slurry preparation in order to overcome, this
The employing concrete mixing plant of a kind of effective reduction self-constriction of bright offer gives up and starches the low self-constriction high-strength concrete of preparation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, in parts by weight, by cement
300-340 part, lithium slag 90-130 part, concrete mixing plant useless slurry 70-110 part, fluvial sand 696-739 part, rubble 1044-1109
Part, economization agent 8.5-10 part, water reducer 4-6 part and water 80-92 part mixing composition.
Further, outer painting economization agent solution after form removal in a day.
Preferably, the Al of described lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, than
Surface area >=450m2/kg。
Further, the useless slurry of described concrete mixing plant forms through precipitation for concrete mixing plant waste water, its moisture content
For 45%-50%, the time that produces is within 24 hours.
Further, described cement is P I52.5 cement.
Described fluvial sand modulus of fineness is 2.4-3.0, and grain composition is 2nd district, and clay content is less than 0.4%.
The continuous grading of described ballast grain sizes 5～20mm, its elongated particles is less than the 3% of rubble gross mass, containing mud
Amount is less than 0.3%.
Described water reducer is polycarboxylate water-reducer, its solid content >=26%.
Described economization agent 28d compressive strength rate >=105%, 28d decrement >=40%.
During outer painting, described economization agent concentration is 50%.
The technology of the present invention is contemplated that: the generation time that the present invention uses, moisture content was 45%-50% within 24 hours
The useless slurry of concrete mixing plant, short owing to producing the time, its solid-phase component still has certain active effect, prepare high-strength mixing
During solidifying soil, can suitably reduce useless slurry consumption, it is achieved useless slurry high value added utilization, thus reduce gel material content, be conducive to fall
Low self-constriction；Economization agent and lithium slag are preferable with the ion in useless slurry and the residual component compatibility, for reducing self-constriction, make diligent
Can be different, over-superimposed effect can be realized；Lithium slag by its active effect while improving concrete inner structure, its
SO3(with SO4 2-Form exists), with activity Al in alkaline environment2O3(or CA3) reaction generation dilatancy product entringite, its
Micro-expansibility can compensate for concrete self-shrinkage, plays the effect of " extender ", and this technical advantage is also the technology spy that lithium slag is exclusive
Point；Research shows, being coated with economization agent outside interior blending is all the effective technology measure reducing concrete self-shrinkage, by its outer painting, especially
Avoiding the consistency problem of economization agent and useless slurry, in the concrete of slurry preparation that gives up concrete mixing plant, outer painting of blending is reduced
Agent, can realize effect of economization agent substantially, thus effectively reduces concrete mixing plant and give up the high-strength concrete of slurry preparation
Self-constriction.
Beneficial effects of the present invention is mainly manifested in: effectively reduce self-constriction.
Detailed description of the invention
The invention will be further described below.
A kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, in parts by weight, by cement
300-340 part, lithium slag 90-130 part, concrete mixing plant useless slurry 70-110 part, fluvial sand 696-739 part, rubble 1044-1109
Part, economization agent 8.5-10 part, water reducer 4-6 part and water 80-92 part mixing composition.
Further, outer painting economization agent solution after form removal in a day.
Preferably, the Al of lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, specific surface area
≥450m2/kg；The useless slurry of concrete mixing plant forms through precipitation for concrete mixing plant waste water, and its moisture content is 45%-50%,
The generation time is within 24 hours；Fluvial sand modulus of fineness is 2.4-3.0, and grain composition is 2nd district, and clay content is less than 0.4%；Cement
For P I52.5 cement；The continuous grading of ballast grain sizes 5～20mm, its elongated particles is less than the 3% of rubble gross mass, containing mud
Amount is less than 0.3%；Water reducer is polycarboxylate water-reducer, its solid content >=26%；Economization agent 28d compressive strength rate >=105%,
28d decrement >=40%, during outer painting, is adjusted to 50% by its concentration.
The give up preparation method of low self-constriction high-strength concrete of slurry preparation of described employing concrete mixing plant is: by cement,
Lithium slag, fluvial sand and rubble stirring (30 seconds), be subsequently adding the useless slurry of concrete mixing plant and water stirs (40 seconds), adds economization agent
Stir (more than 60 seconds) with water reducer, put into standard curing room after molding and carry out maintenance, form removal after 1 day, outer painting economization agent solution
?.
The employing concrete mixing plant of described acquisition gives up and starches low self-constriction high-strength concrete 7d self-shrinking value≤80 of preparation
×10-6, 28d self-shrinking value≤100 × 10-6, and tend towards stability.
Based on above-mentioned formula, the consumption adjusting different component obtains embodiment 1-3, and detects its different larval instar respectively from receiving
Contracting.
Embodiment 1:
Calculation by weight, including cement 340 parts, lithium slag 130 parts, concrete mixing plant useless slurry 110 parts, fluvial sand 696
Part, rubble 1044 parts, economization agent 10 parts, water reducer 6 parts and 80 parts of water, mixing composition, outer painting economization agent solution after form removal in a day.
28d concrete mixing plant gives up and starches the High Strength Concrete Under Compressive Cyclic Loading intensity prepared is 81.5MPa, and different larval instar self-constriction is shown in
Table 1.
Embodiment 2:
Calculation by weight, including cement 330 parts, lithium slag 100 parts, concrete mixing plant useless slurry 100 parts, fluvial sand 714
Part, rubble 1071 parts, economization agent 9 parts, water reducer 5 parts and 85 parts of water, mixing composition, outer painting economization agent solution after form removal in a day.
28d concrete mixing plant gives up and starches the High Strength Concrete Under Compressive Cyclic Loading intensity prepared is 74.7MPa, and different larval instar self-constriction is shown in
Table 1.
Embodiment 3:
Calculation by weight, including cement 300 parts, lithium slag 90 parts, 70 parts of the useless slurry of concrete mixing plant, fluvial sand 739 parts,
Rubble 1109 parts, economization agent 8.5 parts, water reducer 4 parts and 92 parts of water, mixing composition, outer painting economization agent solution after form removal in a day.
28d concrete mixing plant gives up and starches the High Strength Concrete Under Compressive Cyclic Loading intensity prepared is 62.2MPa, and different larval instar self-constriction is shown in
Table 1, table 1 is to use concrete mixing plant to give up to starch the self-shrinking value (× 10 of the low self-constriction high-strength concrete different larval instar prepared-6)
Table 1.
Claims (10)
1. one kind use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, it is characterised in that: according to weight portion
Meter, by cement 300-340 part, lithium slag 90-130 part, concrete mixing plant useless slurry 70-110 part, fluvial sand 696-739 part, rubble
1044-1109 part, economization agent 8.5-10 part, water reducer 4-6 part and water 80-92 part mixing composition.
2. employing concrete mixing plant as claimed in claim 1 gives up and starches the low self-constriction high-strength concrete of preparation, and its feature exists
In: outer painting economization agent solution after form removal in a day.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
It is characterised by: the Al of described lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, specific surface area
≥450m2/kg。
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
It is characterised by: the useless slurry of described concrete mixing plant forms through precipitation for concrete mixing plant waste water, and its moisture content is 45%-
50%, the time that produces is within 24 hours.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
It is characterised by: described cement is P I52.5 cement.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
Being characterised by: described fluvial sand modulus of fineness is 2.4-3.0, grain composition is 2nd district, and clay content is less than 0.4%.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
Being characterised by: the continuous grading of described ballast grain sizes 5～20mm, its elongated particles is less than the 3% of rubble gross mass, containing mud
Amount is less than 0.3%.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
It is characterised by: described water reducer is polycarboxylate water-reducer, its solid content >=26%.
The most as claimed in claim 1 or 2 a kind of use concrete mixing plant give up slurry preparation low self-constriction high-strength concrete, its
It is characterised by: described economization agent 28d compressive strength rate >=105%, 28d decrement >=40%.
The most as claimed in claim 2 a kind of using concrete mixing plant to give up the low self-constriction high-strength concrete of slurry preparation, it is special
Levying and be: when being coated with outward, described economization agent concentration is 50%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298560A (en) * | 2017-06-25 | 2017-10-27 | 长沙善道新材料科技有限公司 | A kind of anti-permeation cracking-resistant concrete |
| CN108892427A (en) * | 2018-08-07 | 2018-11-27 | 深圳市为海建材有限公司 | A kind of solid waste is non-burning brick and preparation method thereof |
| CN109987913A (en) * | 2019-04-10 | 2019-07-09 | 青铜峡市恒源砼业有限公司 | A kind of environment-friendly type wet mixing mortar |
| CN110922147A (en) * | 2019-10-29 | 2020-03-27 | 江苏盐砼新材料科技有限公司 | Tail slurry autoclaved aerated concrete block and preparation method thereof |
| CN113402196A (en) * | 2021-06-23 | 2021-09-17 | 济南方圣混凝土构件有限公司 | Method for preparing ultra-high performance concrete admixture by using concrete waste slurry |
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| CN105776994A (en) * | 2016-02-03 | 2016-07-20 | 绍兴文理学院 | Self-compacting concrete prepared from concrete mixing station waste slurry |
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2016
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107298560A (en) * | 2017-06-25 | 2017-10-27 | 长沙善道新材料科技有限公司 | A kind of anti-permeation cracking-resistant concrete |
| CN108892427A (en) * | 2018-08-07 | 2018-11-27 | 深圳市为海建材有限公司 | A kind of solid waste is non-burning brick and preparation method thereof |
| CN109987913A (en) * | 2019-04-10 | 2019-07-09 | 青铜峡市恒源砼业有限公司 | A kind of environment-friendly type wet mixing mortar |
| CN110922147A (en) * | 2019-10-29 | 2020-03-27 | 江苏盐砼新材料科技有限公司 | Tail slurry autoclaved aerated concrete block and preparation method thereof |
| CN110922147B (en) * | 2019-10-29 | 2021-12-28 | 江苏盐砼新材料科技有限公司 | Tail slurry autoclaved aerated concrete block and preparation method thereof |
| CN113402196A (en) * | 2021-06-23 | 2021-09-17 | 济南方圣混凝土构件有限公司 | Method for preparing ultra-high performance concrete admixture by using concrete waste slurry |
| CN113402196B (en) * | 2021-06-23 | 2022-09-20 | 济南方圣混凝土构件有限公司 | Method for preparing ultra-high performance concrete admixture by using concrete waste slurry |
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Effective date of registration: 20200722 Address after: 530500 the campus of Chengtai Township No.2 Middle School, Chengtai Township, Shanglin County, Nanning City, Guangxi Zhuang Autonomous Region Patentee after: Shanglin forest fuel construction materials Co.,Ltd. Address before: 312000, No. 508 West Ring Road, Yuecheng District, Zhejiang, Shaoxing Patentee before: SHAOXING University |