CN103641411B - A kind of method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete - Google Patents
A kind of method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete Download PDFInfo
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- CN103641411B CN103641411B CN201310637252.0A CN201310637252A CN103641411B CN 103641411 B CN103641411 B CN 103641411B CN 201310637252 A CN201310637252 A CN 201310637252A CN 103641411 B CN103641411 B CN 103641411B
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- 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
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Abstract
The invention discloses a kind of method utilizing sludge bentonite base material to prepare telescopic-pore ecological concrete.It is first to stir bentonite as pore-forming base material together with mud, then this pore-forming base material mixes aftershaping by several times with cement, fine sand, coarse aggregate etc., and maintenance obtains telescopic-pore ecological concrete goods.The features such as the made concrete of the method also can aqueous preserve soil moisture while having porous permeable, efficiency slow release, high-strength light.
Description
Technical field
The present invention relates to a kind of method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete, belong to
The technical field of resource and environment technology.
Background technology
Along with Chinese society economy and the development of urbanization, the yield of municipal sewage is constantly increasing.Mud is at sewage
Accessory after reason, is a kind of extremely complex heterogeneous body being made up of organic relic, microorganism, inorganic particle, colloid etc.
Body.The key property of mud is that moisture content is up to about 90%, and content of organics is high, and easily corruption is smelly, and granule is relatively thin,
Proportion is less.If mud not being carried out final disposal, it will bring to environment and again pollute.China's disposal to mud at present
Based on landfill, and there are a small amount of compost and burning.The biggest problem of Treatment of Sludge is that " preliminary sludge " moisture content is too high, the later stage
Dehydration difficulty is greatly, costly.Therefore, whether fill, or compost, burning, effect is the most undesirable.But, mud also has
Living resources, how to avoid the effective ingredient in secondary pollution that mud produces Appropriate application mud, be for a long time
One of study hotspot urgently to be resolved hurrily.
The patent that relevant recycling sludge utilizes the most gradually increases, and in terms of compost treatment, patent is such as
CN01142234.3 mono-kind utilizes organic sludge to produce method and the device thereof of compoiste fertilizer, and CN02106744.9 utilizes city
City's mud produces the method for compound organic fertilizer, and CN02117359.1 city sludge biofertilizer, CN03115882.X utilizes sewage
Fertilizer prepared by mud, CN01115646.5 utilizes mud to manufacture the complete set of equipments etc. of compoiste fertilizer.Industrial sludge resource
Patent in terms of change such as CN02107442.9 recycling handles method for dirty mire containing heavy metals, CN200410060869.1 utilizes refining
Steel converter mud prepares the method for iron oxide black and iron oxide red pigment, and CN03116753.5 waste aluminum sludge manufactures violet
Cordierite and the method etc. of mullite refractory.
Recycling sludge is used for the patent in terms of building materials numerous, mainly recycling treatment low cost, and can realize big
Ancestorization processes.Patents such as CN87100016 method of making bricks and tiles from sludge, CN03113329.0 uses sewage treatment plant's precipitation dirt
The concrete underwater undispersing agent of mud preparation, CN02116081.3 non-aerated blcoks produced from sludge,
CN200410068173.3 utilizes the method that municipal sludge produces cement pressing products, CN01141481.2 waste residue, mud and useless
The light material of old glass preparation, CN03139052.8 floor tile utilizing oil field sludge to make and production method etc. thereof.
Citing part Patents below, has in terms of utilizing mud direct sintering brick:
Chinese patent CN101058501 A, discloses a kind of sludge sintering brick process, and it includes following flow process: 1) raw material
Mixing；2) aerobic ageing；3) base；4) it is dried；5) firing, raw material is the sewage sludge by moisture content 75%-85% and mud
Dry powder forms, and two kinds of raw material mixing ratios control 1: 1-2.5, and aerobic digestion time is 1-5 days, and base pressure is 1-2MPa,
The aqueous 25-30% of green brick forming, enters kiln and fires after piling up natural drying, sintering temperature controls at 1000-1100 DEG C, tail
Temperature is cooled to less than 150 degree.Use this technique can dissolve in a large number sewage sludge, it is achieved sewage sludge harmlessness recycles, and
Energy consumption is low, and product reaches relevant national standard.
Chinese patent CN101074151 discloses the production method of a kind of bricks from urban domestic sludge, and this invention is city
The process of domestic sludge and utilization, especially for the production method of brickmaking, its step includes fermenting municipal sludge, sends out
Compressing friction after ferment at brickmaking machine tight mud mouth and be heated to more than 70 DEG C, the mud after heating is placed in evacuation in pressure mud tank, takes out
The gas gone out pours in the water added with hydrochloric acid, the mud after process and shale manufacturing bricks by mixing.Present invention, avoiding mud buried in
Pollution to subsoil water, has saved land resource, has stopped the impact on people's life, has utilized making brick from sludge can save energy simultaneously
Source 30%～70%, reduces brickmaking cost.
Chinese patent 201010533431, discloses a kind of Environment-friendlysludge sludge brick and preparation method thereof.Its component and content is:
High-quality soil 30-40%；Colliery powder 30-40%；Mud 30-40%, stirs said components in mixing plant；Use hydraulic pressure
Said mixture material is crushed to the adobe of difformity and size by formula or extruded type brickmaking machine；Natural drying or utilize roasting
Adobe is dried by residual heat from kiln furnace, dried adobe within 2-3 hour, is got product with 900-1100 DEG C of high temperature sintering.This
Open-birth production. art is simple, and low cost has good economic benefit and environmental benefit.
Eco-concrete is to be screened by material, add functional additive, use what certain technique manufactured to have
Special construction is with function, carrying capacity of environment is little, ecological environment phase harmony high, and the concrete that can contribute for environmental protection.Ecological
Concrete is not only as construction material, constructs required works or building for the mankind, and he be with naturally
Merge, natural environment and ecological balance are had the material of active protection effect.The function of the eco-concrete developed at present
Main rain infiltration, sewage disposal, bank slope protection, reduction noise, noise control sterilization, absorption are removed denitrification, are stopped electromagnetism
Ripple and grass planting fix the sand.Ecological coagulation technology of preparing is the most ripe in developed country.If permeable concrete is to grind at present
Studying carefully one of eco-concrete most with application, this concrete has obtained extensively should in developed countries such as Germany, Japan, the U.S.
With, it is mainly used in road and road surfacing.At present China also begins to pay attention to the Greening problem of xoncrete structure, but eco-concrete
Preparation method still have certain limitation.
China Patent No.: CN 201110083342 discloses a kind of eco-concrete and preparation method thereof, and it is by following former
Material is made by weight: with Portland cement 10 ~ 15 parts, quartz sand 40 ~ 60 parts, 5 ~ 10 parts of water, and air-entrainment 0.15 ~
0.25, modified coal ash 15 ~ 20, modifying titanium dioxide 10 ~ 15 parts；Preparation method is: raw material prepares-measures-stir-
Pour into the mold-mechanical pudding-maintenance-demoulding, can be used for bank slope protection engineering.China Patent No.: CN 200510030133
Disclosing a kind of vegetation ecological concrete and preparation method thereof, its plant cover concrete prefabricated section is by the top layer being suitable to vegetation growth
Culture medium layer, be suitable to upper strata porous concrete layer that vegetation root system runs through, be suitable to the middle level of the vegetation root system growth masonry that gives up and cultivate
Base mixed layer and the prefabricated section being suitable to lower floor's porous concrete layer composition four-layer structure that vegetation root system runs through.Its preparation process
It is: the most first prepare equivalently-sized two piece upper and lower layer porous concrete layer；2. on lower floor's porous concrete layer, cultivation is spread
Base, covers produced upper strata porous concrete layer in the culture medium of middle level, and seals up smooth cement at four perisporiums；3. maintenance
3 ~ 4 days；4. in prefabricated section overlying cap layer culture medium layer.Prefabricated section is laid down on riverbank, i.e. long at top after about 14 ~ 20 days
Grass, grass roots runs through the upper, middle and lower and enters outside soil, plays greening and the effect of conserving water and soil.The present invention lays conveniently,
Industrialization production can be carried out.But the method utilizing mud to prepare eco-concrete as raw material has no report.
Chinese patent 101812888A, discloses the preparation method of a kind of concrete brick containing sludge burning ash residue.The party
Method comprises the following steps, and adds raw materials into water mixing, molding, the demoulding after moisture evaporation；Raw material includes cement 12-50%, sand
0-30%, stone 0-50%, sludge burning ash residue 10-50% and chemistry chelate stabilizer 0.1-0.5%(weight ratio)；Chemistry chelating is steady
Determining agent is complexones or organic multicomponent phosphonic acids.Present invention utilizes sludge burning ash residue produced by sewage treatment plant, use
In manufacturing concrete brick, both can reduce the consumption of other fine aggregates, and not reduce its intensity；Solve again sludge emission reduction and mud
The subsequent treatment problem of incineration residue, economizes on resources, economic and environment-friendly.
Chinese patent CN102152383A, a kind of method disclosing manufacturing ecological building blocks of riverway protection slope from sewage plant sludge.
The method is by sewage plant sludge, cement, rubble, sand, water mixing and stirring, under a certain pressure pre-molding, in steam pressure
Carry out maintenance under curing condition, make the ecological slope protection building block for dredging waterway.The present invention can solve the problem that specific resistance to filtration
A difficult problem, solve the secondary pollution problem of Heavy Metals in Sludge, pathogen, it is achieved the regenerated resourcesization of mud utilize.Given birth to
The ecological block produced has high-strength, the characteristic of antiscour, and wherein N, P, K etc. of mud can be as the nutrition of biological growth
Substrate, it is possible to river training slope protection ecologic system, builds good River Landscape.
From above data it can be seen that in the middle of to recycling sludge processing procedure, becoming as Ecological Building Materials
Gesture is more and more obvious.Directly utilize mud and prepare ecological brick, although technique is simple, but be difficult to avoid contained therein being harmful to completely
The environmental problem that element brings.The patent utilizing mud to prepare in terms of eco-concrete is less, and existing patent is also just with dirt
In mud dehydration, this characteristic of the pore-forming in concrete realizes its porosity characteristic, if changed for controlling its hole
Become its aqueous soil moisture conservation characteristic aspect to be not directed to.
Summary of the invention
Just being aimed at this, bentonite is mixed as pore-forming base material by the present invention with mud, it is therefore an objective to utilizes and mixes with mud
Close the bentonite water suction or dehydration stereomutation mixed, and mud dissolution fertilizer efficiency organic substance can enter shape between bentonite bed
Become the characteristics such as slow release effect, thus a kind of side utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete is provided
Method.
The technical scheme is that and a kind of utilize sludge-bentonite base material to prepare telescopic-pore ecological concrete
Method, it be by weight percentage be 1 ~ 5% bentonite, the mud through filter-press dehydration of 5 ~ 20%, the fine sand of 10 ~ 25%, 35 ~
The coarse aggregate of 50%, the cement of 15 ~ 25%, the water of 2.5 ~ 10% are base material, and add 0.5 ~ 1.0% water reducer；Stirring and evenly mixing is rearmounted
Prepare concrete in mould is extruded；After the demoulding, maintenance obtained finished product after 28 days the most under field conditions (factors).
In technique scheme: described cement is Portland cement；Described coarse aggregate is rubble, grade is 5 ~
16mm, apparent density is 2500 ~ 2900kg/m3, piling up porosity is 30 ~ 60%, and water absorption rate is 1 ~ 1.5%, clay content < 0.5%；
Described water reducer uses melamine high efficiency water reducing agent, and water-reducing effect reaches 25 ~ 35%；Described mud is through filter press technique, gravity concentration
Mud after processing etc. common method, its moisture content 75 ~ 90%；Smectite content in bentonite used > 60%, granularity > 100 mesh；
Described fine sand is common fine sand.Described stirring and evenly mixing method is: first bentonite used is stirred together with mud 3 ~
10min, is sufficiently mixed uniformly as pore-forming base material；By whole coarse aggregates+total consumption 50% pore-forming base material stirring 0.5 ~ 5min to mixed
Close uniformly；It is subsequently added into cement+total consumption 30% water stirring 0.5 ~ 5min to mix homogeneously；Add fine sand+total consumption 50% to become
Hole base material stirring 0.5 ~ 5min is to mix homogeneously；It is eventually adding whole water reducer+remaining water stirring more than 3min.It is all right
Conventional steam-pressing aero-concrete equipment is utilized to carry out aerating to improve porosity.
Main advantages of the present invention: 1. in concrete preparation process described in this method, volume after being gradually dehydrated due to mud
Reduce, self-assembling formation porosity characteristic during concrete formation can be made；2. utilize the bentonite water suction mixing incorporation with mud swollen
The swollen characteristic with dehydration volume-diminished, under meeting water and drying condition, mud forms hole can by bentonite stereomutation certainly
Dynamic regulation；3. the fertilizer efficiency organic substance of mud dissolution can enter bentonitic interlayer, plays efficiency slow release effect, and greening is planted by it
It is provided fertilizer efficiency element；4. celluar concrete preparation be the process to Treatment of Sludge Yu recycling simultaneously, have change give up into
Precious feature；The spies such as the concrete 5. prepared also can aqueous preserve soil moisture while having porous permeable, efficiency slow release, high-strength light
Point.6., during cement forms Concrete, harmful element in mud had curing characteristics.7. technique is relatively easy, and goods become
This is cheap, accounts for the 70 ~ 80% of normal concrete；Can save Treatment of Sludge cost simultaneously, 50 ~ 100 yuan/ton.8. the method is one
Kind is pollution-free, low cost, simple recycling sludge utilize new way, and the eco-concrete of preparation may be used for side slope to be protected
The places such as reason, desert afforestation project, roadside greening, have wide market application foreground.
Detailed description of the invention
Example given below is so that the invention will be further described, but is not to be construed as scope
Restriction, some non-intrinsically safes that the present invention is made according to the invention described above content by person skilled in art improve and adjust,
Still fall within protection scope of the present invention.
Example table 1 utilizes sludge-bentonite base material to prepare the formula of hole concertina type ecology coagulation
Example table 2 utilizes sludge-bentonite base material to prepare the technical specification of hole concertina type ecology coagulation
It is (single that the 30d that example table 3 utilizes sludge-bentonite base material to prepare hole concertina type ecology coagulation leaches concentration of element
Position: ppm)
Above-mentioned respectively execute example dispensing and the product reaching the object of the invention can be produced by previous process method.The present invention's
Embodiment all can be implemented, and the invention is not restricted to these embodiments.
Claims (3)
1. utilizing the method that sludge-bentonite base material prepares telescopic-pore ecological concrete, it is weight percent to be contained
Amount is 1～5% bentonite, 5～the mud through filter-press dehydration of 20%, 10～the coarse aggregate of the fine sand of 25%, 35～50%, 15～
The water of cement, 2.5～10% of 25% is base material, and adds 0.5～1.0% water reducer；Stirring and evenly mixing is placed on mould extruding
Concrete is prepared in molding；After the demoulding, maintenance obtained finished product after 28 days the most under field conditions (factors)；
Described stirring and evenly mixing is: first bentonite used is stirred together with mud 3～10min, is sufficiently mixed uniformly as becoming
Hole base material；By whole coarse aggregates+total consumption 50% pore-forming base material stirring 0.5～5min to mix homogeneously；It is subsequently added into cement+total
The stirring 0.5～5min of consumption 30% water is to mix homogeneously；Add fine sand+total consumption 50% pore-forming base material stirring 0.5～5min extremely
Mix homogeneously；It is eventually adding whole water reducer+remaining water stirring more than 3min.
The method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete the most according to claim 1, its
Being characterised by, described cement is Portland cement；Described coarse aggregate is rubble, and grade is 5～16mm, apparent close
Degree is 2500～2900kg/m3, piling up porosity is 30～60%, and water absorption rate is 1～1.5%, clay content < 0.5%；Described subtracts
Water preparation uses melamine high efficiency water reducing agent, and water-reducing effect reaches 25～35%；Described mud is the mud after filter press technique processes, its
Moisture content 75～90%；Smectite content in bentonite used > 60%, granularity > 100 mesh；Described fine sand is common fine sand.
The method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete the most according to claim 1, its
Being characterised by, described bentonite is common commercial bentonite.
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| CN201310637252.0A CN103641411B (en) | 2013-12-03 | 2013-12-03 | A kind of method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete |
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| CN201310637252.0A CN103641411B (en) | 2013-12-03 | 2013-12-03 | A kind of method utilizing sludge-bentonite base material to prepare telescopic-pore ecological concrete |
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| CN105924055B (en) * | 2016-04-22 | 2017-10-13 | 广东龙湖科技股份有限公司 | A kind of pervious concrete with long-acting high permeability |
| CN110963768A (en) * | 2019-12-31 | 2020-04-07 | 郑州恒博环境科技股份有限公司 | Brick containing aluminum processing solid waste and preparation method thereof |
| CN114352309B (en) * | 2022-01-14 | 2023-03-21 | 河海大学 | Biochar-based composite bentonite waterproof brick, and preparation method and installation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515815A (en) * | 2011-11-10 | 2012-06-27 | 许庆华 | Cylindrical attapulgite flower ceramisites with function of water retention |
| CN102850077A (en) * | 2012-08-21 | 2013-01-02 | 西南科技大学 | Method for producing sludge-based ecological concrete product |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515815A (en) * | 2011-11-10 | 2012-06-27 | 许庆华 | Cylindrical attapulgite flower ceramisites with function of water retention |
| CN102850077A (en) * | 2012-08-21 | 2013-01-02 | 西南科技大学 | Method for producing sludge-based ecological concrete product |
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