CN103641411A - Method for preparing telescopic-pore ecological concrete by using sludge-bentonite base material - Google Patents
Method for preparing telescopic-pore ecological concrete by using sludge-bentonite base material Download PDFInfo
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- CN103641411A CN103641411A CN201310637252.0A CN201310637252A CN103641411A CN 103641411 A CN103641411 A CN 103641411A CN 201310637252 A CN201310637252 A CN 201310637252A CN 103641411 A CN103641411 A CN 103641411A
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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 method for preparing telescopic-pore ecological concrete by using a sludge-bentonite base material. The method comprises the steps of firstly uniformly stirring bentonite and sludge together, so as to form a pore forming base material, mixing the pore forming base material with cement, fine sand, coarse aggregates and the like in batches, then, molding and curing, thereby obtaining a telescopic-pore ecological concrete product. The concrete prepared by the method has the characteristics of being capable of containing moisture and preserving soil moisture, being sustained in fertilizer effect release, being high in strength and light in weight and the like while being porous and water permeable.
Description
Technical field
The present invention relates to a kind of method of utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete, belong to the technical field of resource and environment technology.
Background technology
Along with the development of Chinese society economy and urbanization, the output of municipal effluent is in continuous growth.Mud is the fittings after sewage disposal, is a kind of extremely complicated heterogeneous body being comprised of organic relic, bacterium thalline, inorganic particle, colloid etc.The main characteristic of mud be water ratio up to 90% left and right, organic content is high, easily degenerates smellyly, and particle is thin, proportion is less.If mud is not carried out to ultimate disposal, will bring again and pollute to environment.Landfill be take as main to the disposal of mud in China at present, and has a small amount of compost and burning.The biggest problem of sludge treatment is that " preliminary sludge " water ratio is too high, and later stage dehydration difficulty is large, expense is high.Therefore, no matter be landfill, or compost, burning, effect is all undesirable.Yet mud is also useful Biological resources, how to avoid the secondary pollution of sludge creation and rationally utilize the effective constituent in mud, be one of study hotspot urgently to be resolved hurrily for a long time.
The patent of relevant recycling sludge utilization increases in recent years gradually, aspect compost treatment, patent is produced method and the device thereof of compoiste fertilizer as mono-kind of CN01142234.3 utilizes organic sludge, CN02106744.9 utilizes municipal sludge to produce the method for compound organic fertilizer, CN02117359.1 city sludge biofertilizer, the fertilizer that CN03115882.X utilizes sewage sludge to prepare, CN01115646.5 utilizes the suite of equipment of mud manufacture compoiste fertilizer etc.The patent of reclaiming industrial sludge aspect is as CN02107442.9 recycling handles method for dirty mire containing heavy metals, CN200410060869.1 utilizes steel-making converter mud to prepare the method for iron oxide black and iron oxide red pigment, and CN03116753.5 manufactures the method for trichroite and mullite refractory etc. with waste aluminum sludge.
Recycling sludge is numerous for the patent of building materials aspect, be mainly that recycling treatment cost is low, and can realize largeization and process.Patents is as CN87100016 method of making bricks and tiles from sludge, CN03113329.0 adopts the concrete underwater undispersing agent of sewage work's precipitating sludge preparation, CN02116081.3 non-aerated blcoks produced from sludge, CN200410068173.3 utilizes municipal sludge to produce the method for cement pressing products, light material prepared by CN01141481.2 waste residue, mud and discarded glass, mono-kind of CN03139052.8 utilizes floor tile that oil field sludge makes and production method thereof etc.Part Patents for example below, has utilizing aspect mud direct sintering brick:
Chinese patent CN101058501 A, discloses a kind of sludge sintering brick process, and it comprises following flow process: 1) raw material mixes; 2) aerobic ageing; 3) base; 4) dry; 5) fire, raw material is comprised of sewage sludge and the sludge dry powder of water ratio 75%-85%, two kinds of raw material ratio of mixture are controlled at 1: 1-2.5, aerobic digestion time is 1-5 days, base pressure is 1-2MPa, and the moisture 25-30% of green brick forming piles up and enters kiln after seasoning and fire, sintering temperature is controlled at 1000-1100 ℃, and exhaust temperature is cooled to below 150 degree.Use this technique sewage sludge of dissolving in a large number, realize sewage sludge harmlessness recycle, and energy consumption is low, product reaches relevant national standard.
Chinese patent CN101074151 discloses a kind of production method of bricks from urban domestic sludge, this invention is the disposal and utilization of municipal sludge, production method especially for brickmaking, its step comprises ferments municipal sludge, after fermentation, in the compression friction of the tight mud mouth of brick press place, be heated to more than 70 ℃, mud after heating is placed in to press in mud tank and vacuumizes, and the gas of extraction pours in the water that is added with hydrochloric acid, the mud after processing and shale manufacturing bricks by mixing.The present invention avoided mud buried in pollution to underground water, saved land resources, stopped the impact on people's life, utilize the making brick from sludge can save energy 30%～70% simultaneously, reduce brickmaking cost.
Chinese patent 201010533431, discloses a kind of environmental protection sludge brick and preparation method thereof.Its component and content are: high-quality soil 30-40%; Colliery powder 30-40%; Mud 30-40% stirs said components in whipping device; With fluid pressure type or extrusion-type brick press, said mixture material is crushed to the adobe of different shapes and size; Seasoning or utilize roasting kiln waste heat to be dried adobe, gets product dried adobe with 900-1100 ℃ of high temperature sintering 2-3 hour.Production technique of the present invention is simple, and cost is low, has good economic benefit and environmental benefit.
Eco-concrete is by material screening, add functional additive, adopt certain technique produced have special construction with function, carrying capacity of environment is little, ecotope phase Harmony is high, and the concrete that can contribute for environmental protection.Eco-concrete is not only as material of construction, and for the mankind construct needed works or buildings, and he is and natural fusion, physical environment and the eubiosis is had to the material of active protection effect.The function of the eco-concrete of developing at present mainly contains rain penetration, sewage disposal, riverbank bank protection, reduces noise, noise control sterilization, absorb and remove oxynitride, counterchecking electromagnetic wave and grass planting and fix the sand etc.Ecological coagulation technology of preparing is comparatively ripe in developed country.If permeable concrete is one of maximum eco-concrete of research at present and application, this concrete is widely applied in developed countries such as Germany, Japan, the U.S., is mainly used in road and road surfacing.China also starts to pay attention to the Greening problem of concrete structure at present, but the preparation method of eco-concrete still has certain limitation.
China Patent No.: CN 201110083342 discloses a kind of eco-concrete and preparation method thereof, it is made by weight by following raw materials according: with 10 ~ 15 parts of ordinary Portland cements, 40 ~ 60 parts of quartz sands, 5 ~ 10 parts, water, air entraining agent 0.15 ~ 0.25, modified coal ash 15 ~ 20,10 ~ 15 parts of modifying titanium dioxides; Preparation method is: starting material are prepared-measured-stir-pour into the mold-mechanical pudding-maintenance-demoulding, can be used for riverbank slope protection works.China Patent No.: CN 200510030133 discloses a kind of vegetation ecological concrete and preparation method thereof, its plant cover concrete prefabricated section by be suitable for vegetation growth top layer culture medium layer, be suitable for upper strata cellular concrete layer that vegetation root system runs through, be suitable for the useless masonry substratum mixolimnion in middle level of vegetation root system growth and be suitable for the prefabricated section that lower floor's cellular concrete layer that vegetation root system runs through forms four-layer structure.Its preparation process is: the 1. upper and lower layer of identical two of first preparation size cellular concrete layers; On ② lower floor cellular concrete layer, spread substratum, on the substratum of middle level, cover the upper strata cellular concrete layer having made, and seal up smooth cement at surrounding wall; 3. maintenance is 3 ~ 4 days; 4. on prefabricated section, cover top layer culture medium layer.Prefabricated section is laid on riverbank, after approximately 14 ~ 20 days, at top, grows grass, and 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, can carry out industrialization production.But the method for utilizing mud to prepare eco-concrete as starting material has no report.
Chinese patent 101812888A, discloses a kind of preparation method who contains the concrete brick of sludge burning ash residue.The method comprises the following steps, and raw material is added water and mixed to moulding, the demoulding after moisture evaporation; Raw material comprises cement 12-50%, sand 0-30%, stone 0-50%, sludge burning ash residue 10-50% and chemical chelate stabilizer 0.1-0.5%(weight ratio); Chemistry chelate stabilizer is complexone or organic multicomponent phosphonic acids.The sludge burning ash residue that the present invention has utilized sewage work to produce, for the manufacture of concrete brick, both can reduce the consumption of other fine aggregates, and not reduce its intensity; The subsequent disposal problem that has solved again mud reduction of discharging and sludge burning ash residue, economizes on resources, economic environmental protection.
Chinese patent CN102152383A, discloses a kind of method of 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, and pre-molding under certain pressure carries out maintenance under steam press maintenance condition, makes the ecological slope protection building block for river regulation.The present invention can solve the difficult problem that sludge treatment is disposed, and solved the secondary pollution problem of Heavy Metals in Sludge, pathogenic bacteria, realizes the renewable resource utilization of mud.Characteristic high-strength, antiscour that the ecological block of producing has, and wherein N, P, the K etc. of mud can be as the nutraceutical matrixes of biological growth, can river training slope protection ecologic system, builds good River Landscape.
From above data, can find out, in the middle of to recycling sludge treating processes, the trend using it as Ecological Building Materials is more and more obvious.Directly utilize mud to prepare ecological brick, although technique is simple, be difficult to avoid the environmental problem that wherein harmful elements contained is brought completely.Utilize mud to prepare the patent of eco-concrete aspect less, existing patent also just utilizes this characteristic of the pore-forming in concrete in sludge dewatering process to realize its porosity characteristic, if thereby change its moisture soil moisture conservation characteristic aspect and do not relate to for controlling its hole.
Summary of the invention
Just be aimed at this, the present invention mixes wilkinite as pore-forming base-material with mud, object is to utilize to mix wilkinite water suction or the dehydration stereomutation of mixing with mud, and mud stripping fertilizer efficiency organic substance can enter between bentonite bed and form the characteristics such as slow release effect, thereby provide a kind of method of utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete.
Technical scheme of the present invention is: a kind of method of utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete, it is to be that 1 ~ 5% wilkinite, 5 ~ 20% the mud through filter-press dehydration, 10 ~ 25% fine sand, 35 ~ 50% coarse aggregate, 15 ~ 25% cement, 2.5 ~ 10% water are base-material, and add 0.5 ~ 1.0% water reducer by weight percentage; Stirring and evenly mixing is placed on forming mould extrusion molding and prepares concrete; After the demoulding, maintenance obtained finished product after 28 days under field conditions (factors) again.
In technique scheme: described cement is ordinary Portland cement; Described coarse aggregate is rubble, and grade is 5 ~ 16mm, and apparent density is 2500 ~ 2900kg/m
3, piling up porosity is 30 ~ 60%, water-intake rate is 1 ~ 1.5%, silt content <0.5%; Described water reducer adopts melamine high efficiency water reducing agent, and water-reducing effect reaches 25 ~ 35%; Described mud is the mud after the common methods such as filter press technique, gravity concentration are processed, its water ratio 75 ~ 90%; Smectite content >60% in wilkinite used, granularity >100 order; Described fine sand is common fine sand.Described stirring and evenly mixing method is: first wilkinite used is stirred to 3 ~ 10min together with mud, fully mix as pore-forming base-material; Whole coarse aggregates+total consumption 50% pore-forming base-material is stirred to 0.5 ~ 5min to mixing; Then add cement+total consumption 30% water to stir 0.5 ~ 5min to mixing; Add again fine sand+total consumption 50% pore-forming base-material to stir 0.5 ~ 5min to mixing; Finally add more than whole water reducers+remaining water stirs 3min.It can also utilize conventional steam-pressing aero-concrete equipment to carry out aerating to improve porosity.
major advantage of the present invention:1. described in present method in concrete preparation process, due to mud dewater gradually after volume-diminished, can make self-assembling formation porosity characteristic in concrete formation process; 2. utilize and mix the wilkinite water-swelling of mixing and the characteristic of dewatering volume-diminished with mud, meeting under water and drying conditions, mud forms hole and can automatically regulate by wilkinite stereomutation; 3. the fertilizer efficiency organic substance of mud stripping can enter bentonitic interlayer, plays fertilizer efficiency slow releasing function, and it provides fertilizer efficiency element to afforestation vegetation; 4. cellular concrete preparation is the process to sludge treatment and recycling simultaneously, has the advantages that to turn waste into wealth; The features such as the concrete of 5. preparing also can moisturely preserve soil moisture when having porous permeable, fertilizer efficiency slowly-releasing, high-strength light.6. cement forms in during Concrete, and harmful element in mud is had to curing characteristics.7. technique is relatively simple, and goods are with low cost, accounts for 70 ~ 80% of normal concrete; Can save sludge treatment cost, 50 ~ 100 yuan simultaneously
/ton.8. the method is that a kind of pollution-free, low-cost, simple recycling sludge utilizes new way, and the eco-concrete of preparation can, for places such as side slope nursing, desert afforestation project, roadside greenings, have wide market application foreground.
Embodiment
Embodiment given below is so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; some non-intrinsically safes that person skilled in art makes the present invention according to the invention described above content improve and adjust, and still belong to protection scope of the present invention.
example table 1utilize mud-wilkinite base-material to prepare the formula of the ecological coagulation of hole concertina type
example table 2utilize mud-wilkinite base-material to prepare the technical indicator of the ecological coagulation of hole concertina type
example table 3the 30d that utilizes mud-wilkinite base-material to prepare the ecological coagulation of hole concertina type leaches concentration of element (unit: ppm)
The above-mentioned example of respectively executing is prepared burden and can produce by aforementioned processing method the product that reaches the object of the invention.Embodiments of the invention all can be implemented, and the invention is not restricted to these embodiment.
Claims (4)
1. a method of utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete, it is to be that 1 ~ 5% wilkinite, 5 ~ 20% the mud through filter-press dehydration, 10 ~ 25% fine sand, 35 ~ 50% coarse aggregate, 15 ~ 25% cement, 2.5 ~ 10% water are base-material, and add 0.5 ~ 1.0% water reducer by weight percentage; Stirring and evenly mixing is placed on forming mould extrusion molding and prepares concrete; After the demoulding, maintenance obtained finished product after 28 days under field conditions (factors) again.
2. the method for utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete according to claim 1, it is characterized in that, described stirring and evenly mixing is: first wilkinite used is stirred to 3 ~ 10min together with mud, fully mix as pore-forming base-material; Whole coarse aggregates+total consumption 50% pore-forming base-material is stirred to 0.5 ~ 5min to mixing; Then add cement+total consumption 30% water to stir 0.5 ~ 5min to mixing; Add again fine sand+total consumption 50% pore-forming base-material to stir 0.5 ~ 5min to mixing; Finally add more than whole water reducers+remaining water stirs 3min.
3. the method for utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete according to claim 1 and 2, is characterized in that, described cement is ordinary Portland cement; Described coarse aggregate is rubble, and grade is 5 ~ 16mm, and apparent density is 2500 ~ 2900kg/m
3, piling up porosity is 30 ~ 60%, water-intake rate is 1 ~ 1.5%, silt content <0.5%; Described water reducer adopts melamine high efficiency water reducing agent, and water-reducing effect reaches 25 ~ 35%; Described mud is the mud after the common methods such as filter press technique, gravity concentration are processed, its water ratio 75 ~ 90%; Smectite content >60% in wilkinite used, granularity >100 order; Described fine sand is common fine sand.
4. the method for utilizing mud-wilkinite base-material to prepare hole concertina type eco-concrete according to claim 1 and 2, is characterized in that, mud used is the mud after all kinds of conventional processed; Described wilkinite is common commercial wilkinite.
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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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| CN103641411B CN103641411B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924055A (en) * | 2016-04-22 | 2016-09-07 | 广东龙湖科技股份有限公司 | Long-acting high-permeability pervious concrete |
| 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 |
| CN114352309A (en) * | 2022-01-14 | 2022-04-15 | 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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- 2013-12-03 CN CN201310637252.0A patent/CN103641411B/en active Active
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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924055A (en) * | 2016-04-22 | 2016-09-07 | 广东龙湖科技股份有限公司 | Long-acting high-permeability pervious concrete |
| 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 |
| CN114352309A (en) * | 2022-01-14 | 2022-04-15 | 河海大学 | Biochar-based composite bentonite waterproof brick, and preparation method and installation method thereof |
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