CN106396533A - Low-creep concrete prepared by adopting concrete mixing station waste slurry - Google Patents

Low-creep concrete prepared by adopting concrete mixing station waste slurry Download PDF

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Publication number
CN106396533A
CN106396533A CN201610658004.8A CN201610658004A CN106396533A CN 106396533 A CN106396533 A CN 106396533A CN 201610658004 A CN201610658004 A CN 201610658004A CN 106396533 A CN106396533 A CN 106396533A
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China
Prior art keywords
concrete
mixing plant
useless slurry
concrete mixing
parts
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CN201610658004.8A
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CN106396533B (en
Inventor
杜时贵
何智海
雍睿
黄曼
刘闯
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Shandong Zhaohe Environmental Protection Building Materials Co ltd
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University of Shaoxing
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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
    • 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
    • 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
    • C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Low-creep concrete prepared by adopting concrete mixing station waste slurry is disclosed. The concrete is prepared by mixing, by weight, 260-290 parts of cement, 40-60 parts of rice husk ash, 50-60 parts of lithium slag, 30-50 parts of emery powder, 70-110 parts of the concrete mixing station waste slurry, 692-728 parts of river sand, 1038-1092 parts of broken stone, 4-6 parts of a water reducer and 100-130 parts of water. The strength grade of the low-creep concrete is C50-C60, the 28 d creep degree is not more than 20*10<-6>/MPa, the 90 d creep degree is not more than 30*10<-6>/MPa, and the creep degree tends to be stable. The rice husk ash, the lithium slag, the emery powder and other components in the concrete facilitate creep reduction, are good in compatibility with the waste slurry, have different functions for creep reducing, can achieve a super-composite effect and effectively reduce creep of the concrete prepared by adopting the concrete mixing station waste slurry.

Description

A kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry
Technical field
The invention belongs to building material field, it is specifically related to a kind of low concrete of creeping, can effectively reduce and adopt coagulation The creeping of concrete of soil mixing station useless slurry preparation.
Background technology
Concrete material is still that usage amount is maximum, using face construction material 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, 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 produce 0.03 ton of waste water it means that The Concrete Mixing Station of China will produce about 0.5 hundred million tons of waste water every year, contains 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 kind greatly wastes, and what is more important can bring huge environmental pollution, such as pollutes 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.
How effectively to dispose these waste water is that current concrete mixing plant enterprise one of is concerned about with thorny thing the most.? There are some researches show, concrete mixing plant waste water can be used for preparing concrete, and be applied in some Practical Projects.For Improve the utilization ratio of concrete mixing plant waste water, waste water is carried out with 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 beneficial achievements.With correlational study continue deeply, mix The concrete of solidifying soil mixing station useless slurry preparation also presents some obvious technological deficiencies, for example, creep excessive, greatly limit Its engineering range.Trace it to its cause essentially consist in useless slurry pH value higher, higher alkaline environment certainly will increase concrete Creep, simultaneously because useless slurry active effect is relatively low, for ensureing not reducing the concrete strength of its preparation, its consumption is generally large, Thereby increase gel material content, thus increased the concrete creep of its preparation.Merely using reduction normal concrete , it is difficult to the excessive technical barrier of the concrete creep of effectively solving concrete mixing plant useless slurry preparation, it is special for the technology crept Property is：On the one hand, the solid concentration in useless slurry adds cement and mineral admixture consumption, causes it in preparation same intensity etc. Gel material content during level concrete is larger, certainly will increase and creep；On the one hand, contain in useless slurry a lot of aniones, sun from Son and the additive of some residuals, ion component is complicated, and some are conducive to increase to creep, and some advantageously reduce creeps, more Importantly, consequent creep in increase compared with high alkalinity environmental benefits.For solve its creep excessive technical barrier it is necessary to Statistical analysiss are carried out to its ion component, finds out the preferable additive of property compatible and mineral admixture, and reduce gelling material Material consumption.This problem ground solves to have no report in the concrete of existing concrete mixing plant useless slurry preparation.
Content of the invention
In order to overcome the higher deficiency of creeping of the concrete using the preparation of concrete mixing plant useless slurry, the present invention provides The low concrete of creeping using the preparation of concrete mixing plant useless slurry that a kind of effective reduction is crept.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry, in parts by weight, by cement 260-290 Part, rice hull ash 40-60 part, lithium slag 50-60 part, abrasive powder 30-50 part, concrete mixing plant useless slurry 70-110 part, fluvial sand 692-728 part, rubble 1038-1092 part, water reducer 4-6 part and water 100-130 part mixing composition.
Further, described rice hull ash amorphous Si O2Mass percentage content >=90%, specific surface area >=62000m2/ Kg, mean diameter≤5.7 μm.
Preferably, the Al of described lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, than Surface area >=450m2/kg.
Further, described abrasive powder microhardness >=3000kg/mm2, specific surface area >=500m2/kg.
Further, described concrete mixing plant useless slurry is that concrete mixing plant waste water forms through precipitation, its moisture content For 45%-50%, generation time is within 24 hours.
Described cement is P I52.5 cement.
Described river sand fineness modulus are 2.4-3.0, and grain composition is 2nd area, 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%.
The technology design of the present invention is：Within 24 hours, moisture content is 45%-50% to the generation time that the present invention adopts Concrete mixing plant useless slurry, because generation time is short, its solid-phase component still has certain active effect, is not reducing coagulation Under conditions of native strength grade, can suitably reduce useless slurry consumption, realize useless slurry high value added utilization, thus reduce Binder Materials using Amount, advantageously reduces and creeps；Ion in rice hull ash, lithium slag and abrasive powder and useless slurry and the residual component compatibility are preferably, right Creep in reduction, action function is different, achievable over-superimposed effect；The micro aggregate effect of rice hull ash and active effect can have Effect improves concrete inner structure, and Concrete Structure resists the ability crept, and rice hull ash contains the hole of a large amount of micro-meter scales in addition Gap, and there is huge specific surface area, therefore there is certain water absorption, play the effect of " cistern ", this point is other The technical advantage that mineral admixture does not possess, thus reducing with effectively delaying inside concrete relative humidity, advantageously reduces Xu Become；Lithium slag passes through its active effect while improving concrete inner structure, its SO3(with SO4 2-Form exists), in alkalescence With active Al in environment2O3(or CA3) reacting generation dilatancy product entringite, its micro-expansibility can compensate for concrete creep, rises To the effect of " extender ", this technical advantage is also the exclusive technical characterstic of lithium slag；Abrasive powder has very high hardness and bullet Property modulus, replace unhydrated cement in concrete, improve the concrete ability crept of opposing, thus effectively reduce concrete stirring Mix creeping of concrete prepared by station useless slurry.
Beneficial effects of the present invention are mainly manifested in：Effectively reduce and creep.
Specific embodiment
The invention will be further described below.
A kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry, in parts by weight, by cement 260-290 Part, rice hull ash 40-60 part, lithium slag 50-60 part, abrasive powder 30-50 part, concrete mixing plant useless slurry 70-110 part, fluvial sand 692-728 part, rubble 1038-1092 part, water reducer 4-6 part and water 100-130 part mixing composition.
Further, rice hull ash amorphous Si O2Mass percentage content >=90%, specific surface area >=62000m2/ kg, averagely Particle diameter≤5.7 μm；The Al of lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, specific surface area >= 450m2/kg；Abrasive powder microhardness >=3000kg/mm2, specific surface area >=500m2/kg；Concrete mixing plant useless slurry is mixed Solidifying soil mixing station waste water forms through precipitation, and its moisture content is 45%-50%, and generation time is within 24 hours；Fluvial sand fineness mould Number is 2.4-3.0, and grain composition is 2nd area, and clay content is less than 0.4%；Cement is P I52.5 cement；Ballast grain sizes 5～20mm Continuous grading, its elongated particles be less than rubble gross mass 3%, clay content be less than 0.3%；Water reducer is polycarboxylic acids diminishing Agent, its solid content >=26%.
The described preparation method of low concrete of creeping using the preparation of concrete mixing plant useless slurry is：By cement, rice hull ash, Lithium slag, abrasive powder, fluvial sand and rubble stirring (30 seconds), are subsequently adding concrete mixing plant useless slurry and water stirring (40 seconds), then Add water reducer stirring (more than 60 seconds).
The low strength grade of concrete of creeping using the preparation of concrete mixing plant useless slurry of described acquisition is C50-C60,28d Creep degree≤20 × 10-6/ MPa, 90d creep degree≤30 × 10-6/ MPa, and tend towards stability.
Based on above-mentioned formula, the consumption adjusting different component obtains embodiment 1-3, and detects that its different larval instar is crept respectively Degree.
Embodiment 1：
Calculation by weight, including 290 parts of cement, 60 parts of rice hull ash, 60 parts of lithium slag, 50 parts of abrasive powder, concrete 110 parts of mixing plant useless slurry, 692 parts of fluvial sand, 1038 parts of rubble, 6 parts of water reducer and 100 parts of water.
The concrete crushing strength of 28d concrete mixing plant useless slurry preparation is 62.6MPa, and its different larval instar creep degree is shown in Table 1.
Embodiment 2：
Calculation by weight, including 270 parts of cement, 55 parts of rice hull ash, 55 parts of lithium slag, 45 parts of abrasive powder, concrete 100 parts of mixing plant useless slurry, 704 parts of fluvial sand, 1056 parts of rubble, 5 parts of water reducer and 115 parts of water.
The concrete crushing strength of 28d concrete mixing plant useless slurry preparation is 57.2MPa, and its different larval instar creep degree is shown in Table 1.
Embodiment 3：
Calculation by weight, including 260 parts of cement, 40 parts of rice hull ash, 50 parts of lithium slag, 30 parts of abrasive powder, concrete 70 parts of mixing plant useless slurry, 728 parts of fluvial sand, 1092 parts of rubble, 4 parts of water reducer and 130 parts of water.
The concrete crushing strength of 28d concrete mixing plant useless slurry preparation is 53.3MPa, and its different larval instar creep degree is shown in Table 1.Table 1 is the creep degree (× 10 of the low concrete different larval instar of creeping using the preparation of concrete mixing plant useless slurry-6/MPa)
Table 1.

Claims (9)

1. a kind of using concrete mixing plant useless slurry preparation low creep concrete it is characterised in that：In parts by weight, by water Mud 260-290 part, rice hull ash 40-60 part, lithium slag 50-60 part, abrasive powder 30-50 part, concrete mixing plant useless slurry 70-110 Part, fluvial sand 692-728 part, rubble 1038-1092 part, water reducer 4-6 part and water 100-130 part mixing composition.
2. as claimed in claim 1 a kind of using concrete mixing plant useless slurry preparation low creep concrete it is characterised in that： Described rice hull ash amorphous Si O2Mass percentage content >=90%, specific surface area >=62000m2/ kg, mean diameter≤5.7 μ m.
3. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：The Al of described lithium slag2O3And SiO2Mass fraction sum ＞ 75%, SO3Mass fraction ＞ 7.5%, specific surface area >= 450m2/kg.
4. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：Described abrasive powder microhardness >=3000kg/mm2, specific surface area >=500m2/kg.
5. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：Described concrete mixing plant useless slurry is that concrete mixing plant waste water forms through precipitation, and its moisture content is 45%-50%, produces The raw time is within 24 hours.
6. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：Described cement is P I52.5 cement.
7. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：Described river sand fineness modulus are 2.4-3.0, and grain composition is 2nd area, and clay content is less than 0.4%.
8. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：The continuous grading of described ballast grain sizes 5～20mm, its elongated particles is less than the 3% of rubble gross mass, and clay content is less than 0.3%.
9. a kind of low concrete of creeping using the preparation of concrete mixing plant useless slurry as claimed in claim 1 or 2, its feature exists In：Described water reducer is polycarboxylate water-reducer, its solid content >=26%.
CN201610658004.8A 2016-08-12 2016-08-12 A kind of low concrete of creeping prepared using concrete mixing plant waste pulp Active CN106396533B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107522421A (en) * 2017-08-16 2017-12-29 湖南兆丰混凝土有限公司 A kind of concrete mineral additive, its preparation method and a kind of concrete
CN111704413A (en) * 2020-06-24 2020-09-25 南宁市嘉大混凝土有限公司 Concrete prepared from waste slurry of concrete mixing plant
US20240059613A1 (en) * 2022-08-16 2024-02-22 Dalian University Of Technology Curing agent for disposal of municipal solid waste incineration (mswi) fly ash and preparation method and use method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1226530A (en) * 1999-03-05 1999-08-25 张文权 Lithium dreg concrete
CN101891426A (en) * 2010-08-04 2010-11-24 中铁二局股份有限公司 Low-creep C60 high-performance concrete
CN102701654B (en) * 2012-06-20 2013-10-30 东南大学 Low-creep concrete
CN105461274B (en) * 2015-11-24 2017-07-11 绍兴文理学院 A kind of low concrete of creeping
CN105776994B (en) * 2016-02-03 2018-06-26 绍兴文理学院 A kind of self-compacting concrete prepared using concrete mixing plant useless slurry

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107522421A (en) * 2017-08-16 2017-12-29 湖南兆丰混凝土有限公司 A kind of concrete mineral additive, its preparation method and a kind of concrete
CN111704413A (en) * 2020-06-24 2020-09-25 南宁市嘉大混凝土有限公司 Concrete prepared from waste slurry of concrete mixing plant
US20240059613A1 (en) * 2022-08-16 2024-02-22 Dalian University Of Technology Curing agent for disposal of municipal solid waste incineration (mswi) fly ash and preparation method and use method thereof
US11919811B1 (en) * 2022-08-16 2024-03-05 Dalian University Of Technology Curing agent for disposal of municipal solid waste incineration (MSWI) fly ash and preparation method and use method thereof

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Effective date of registration: 20221021

Address after: 265400 88 Jinlong Road, Zhaoyuan City, Yantai City, Shandong Province

Patentee after: Shandong Zhaohe Environmental Protection Building Materials Co.,Ltd.

Address before: 312000 508 Yuecheng West Road, Yuecheng District, Shaoxing, Zhejiang

Patentee before: SHAOXING University