CN104891892A - Method used for preparing simulate planting concrete from sludge - Google Patents
Method used for preparing simulate planting concrete from sludge Download PDFInfo
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- CN104891892A CN104891892A CN201510242654.XA CN201510242654A CN104891892A CN 104891892 A CN104891892 A CN 104891892A CN 201510242654 A CN201510242654 A CN 201510242654A CN 104891892 A CN104891892 A CN 104891892A
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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 provides a method used for preparing simulate planting concrete from sludge. The method comprises following steps: large particle substances in sludge are removed, and the sludge is subjected to dehydration; the dehydrated sludge is uniformly mixed with other ingredients so as to obtain a sludge mixture; the sludge mixture is subjected to balling so as to obtain cobblestone-shaped aggregate materials with uniform size; a cementing material and the cobblestone-shaped aggregate materials are subjected to cementation moulding so as to obtain porous concrete blocks; standard curing is carried out; natural soli is distributed on a bottom layer as subbottom soil; the porous concrete blocks are dispersed on the subbottom soil; the pores of the porous concrete blocks are filled with a planting matrix; and the surfaces of the porous concrete blocks are coated with natural soil so as to obtain the simulate planting concrete. The method is capable of realizing resource utilization of sludge, avoiding a series problems caused by sludge dredging, bottom mud, and industrial sludge, is capable of reducing consumption of natural broken stone and cobble, and reducing pollution loading of river caused by rain and overland runoff slightly-polluted water.
Description
Technical field
The invention belongs to sludge solidification field, particularly a kind of method utilizing mud to prepare imitative concrete for plant growth.
Background technology
Mud is if river bottom mud, Marine shoal mud, dredging silt and industrial silt etc. are containing a large amount of organic and heavy metal contaminants, stack improperly not only to take up space, affect attractive in appearance, also very likely can cause environmental pollution, be best treatment process to the recycling of mud.Utilize solidifying agent, as cement, flyash etc. are cured mud, mud can be made to have higher intensity, as can effective antiscour and prevent because side slope causes built on the sand landslide during river course slope protection; In addition, the mud after solidification is more closely knit, can ooze out by the pollutent effectively reduced in mud.
Existing concrete for plant growth usually stirs cast by coarse aggregate, cement, water and admixture and forms, a kind of polynuclear plane of the porous nickel distribution that it is formed by sticking to each other after coarse aggregate Surface coating one deck grout, thus root system of plant extension requisite space can be met.Normal germination and growth that water-holding agent and plant-growth desired nutritional material can ensure plant is filled in hole.
Summary of the invention
Goal of the invention: for current Problems existing, the present invention proposes a kind of method utilizing mud to prepare imitative concrete for plant growth, realizes the innoxious of mud and recycling.
Technical scheme: a kind of method utilizing mud to prepare imitative concrete for plant growth provided by the invention, comprises the following steps:
(1) the large-scale particulate matter in mud is removed, and centrifuge dehydration;
(2) mud after dehydration is mixed with ordinary Portland cement, flyash, lime, phosphogypsum, solid waste, alkali-activator, hydration reaction promotor, binding agent, water reducer, obtain sludge mixture; Water can be added in right amount according to condition, make it have plasticity-;
(3) adopt artificial or mechanical means to make sludge mixture balling-up, form cobble shape aggregate of uniform size;
(4) cement, water and admixture are configured to consolidating material, with cobble shape aggregate mix and blend, add strengthening agent in whipping process, then pressure is smash in layering, makes cobble shape aggregate cementation and formation, obtains cellular concrete test block; By cellular concrete test-block standard curing;
(5) get natural soil and be laid in bottom, thickness is greater than 4cm, as base soil;
(6) cellular concrete test block good for maintenance is placed on base soil, and compacting;
(7) fill in the hole of cellular concrete test block and plant raw base material, and make to plant raw base material in cellular concrete test block surface spray water and infiltrate in the hole of cellular concrete test block depths;
(8) at cellular concrete test block Surface mulch natural soil, thickness is about 2-3cm; Obtain.
In step (1), described mud comprises river bottom mud, Marine shoal mud, dredging silt and industrial silt.
In step (2), described ordinary Portland cement, flyash, lime, phosphogypsum, solid waste, alkali-activator, hydration reaction promotor, binding agent and water reducer account for 20%-30%, 20%-25%, 10%-15%, 2%-6%, 2%-4%, 15%-25%, 2%-4%, 5%-10% and 2%-4% of dewatered sludge quality respectively.
In step (2), described solid waste is selected from one or more in cinder, blast furnace slag, slag, slag, discarded metal, building waste and glass dregs; Described alkali-activator is selected from one or more in sodium carbonate, potassium hydroxide and sodium hydroxide; Hydration reaction promotor is selected from one or more in calcium formiate, trolamine, anhydrous sodium sulphate and urea; Binding agent is selected from one or more in water glass, pitch, synthetic resins and gelatin; Water reducer is naphthalene water reducer.
In step (3), described cobble shape aggregate size is 20mm-30mm.
In step (4), described cement is silicate cement, aluminosulfate cement or aluminate class cement; Admixture is gypsum; The mass ratio of admixture and cement is 1:4-2:3; Described consolidating material degree of mobilization is 180mm-200mm; The addition of described strengthening agent is 1% of consolidating material quality.
In step (4), normal curing condition is: temperature 20 DEG C ± 2 DEG C, relative humidity more than 95% maintenance 28 days.
In step (7), described in plant the mixture that raw base material is fertilizer, pearlstone, zeolite powder, absorbent resin and natural soil; Wherein fertilizer, pearlstone, zeolite powder and absorbent resin account for 5%-10%, 1%-2%, 2%-5% and 0.1%-0.2% of natural soil quality respectively.
Beneficial effect: the method utilizing mud to prepare imitative concrete for plant growth provided by the invention, mud is carried out chemosetting, and adopt suitable method to be made into the suitable pebble-type macrobead of size for the preparation of the large aggregate in concrete for plant growth, and concrete for plant growth bulkhead tech is studied, so not only mud can be carried out recycling, avoid the series of problems that dredging silt, bed mud and industrial sludge bring, and the consumption to natural rubble, cobble can be reduced; In addition, utilize concrete for plant growth to carry out side slope protection, and utilize the plant planted in concrete for plant growth to carry out purification to rainwater and rainwash water can to reduce rainwater and rainwash micro-polluted water to the pollution load of river.
Accompanying drawing explanation
Fig. 1 is imitative concrete for plant growth essential structure; Wherein, 1 is the natural soil of Surface mulch; 2 is cellular concrete test block; 3 is base soil; 4 cobble shape aggregates; 5 for planting raw base material.
Embodiment
The preparation method of strengthening agent: strengthening agent is that the combination two or more arbitrarily in lignocellulose, sodium sulfate, S-WAT, magnesium chloride, magnesium oxide, water glass, alum, ferric sulfate, coupling agent, trolamine is prepared from through step hybrid reactions such as stirring, water bath with thermostatic control heating, coolings.
Embodiment 1
(1) section, the Qinhuaihe River, Nanjing riverway sludge will be taken from and remove centrifuge dehydration after macrobead thing;
(2) silicate cement, flyash, lime, phosphogypsum, trade waste, alkali-activator, hydration promoting agents, binding agent and water reducer are mixed with mud, the mass ratio accounting for dewatered sludge is respectively 30%, 24%, 10%, 4%, 2%, 20%, 2%, 6% and 2%, control the amount of external adding water, make mixture have plasticity-;
(3) manually carry out balling-up to sludge mixture, pebble-type aggregate size is about 20mm-30mm;
(4) low-alkalinity sulphoaluminate cement and gypsum are mixed according to mass ratio 2:3, add external adding water, control the degree of mobilization of consolidating material between 180mm-190mm, consolidating material and aggregate are stirred, add 1% laboratory self-control strengthening agent, layering is smash molded, is bonded to cellular concrete test block;
(5) with reference to concrete pouring standard, by cellular concrete test block maintenance 28d under normal curing condition;
(6) get natural soil and be laid in water-permeable Plant basket bottom as base soil, thickness is about 5cm;
(7) be placed on base soil by cellular concrete test block good for maintenance, slightly firmly pressing makes concrete base submerge soil;
(8) get and account for fertilizer, pearlstone, zeolite powder and the absorbent resin that natural soil mass ratio is respectively 8%, 1%, 3% and 0.1% and fully mix with natural soil, be configured to plant raw base material, between the hole being filled into cellular concrete, and suitably sprinkle water, make to plant raw base material and penetrate between the hole of lower floor;
(9) use natural soil at surface coverage top layer soil moved in improve the original, thickness is about 3cm, and soil moved in improve the original is sowed Caulis Miscanthis floriduli, Festuca Arundinacea, cogongrass and false indigo four kinds of grass seeds, needs early stage regularly watering maintenance to ensure the normal germination of plant.Grass seed selection is germinateed soon, the plant grass seeds of well developed root system, strong stress resistance.
The indices that table 1 is tested for cellular concrete test block, table 2 is each plant growth situation.
(10) table 1 cellular concrete test block indices
(11)
(12) growing state of the different plant of table 2 in imitative concrete for plant growth
Embodiment 2
(1) section, the Qinhuaihe River, Nanjing riverway sludge will be taken from and remove centrifuge dehydration after macrobead thing;
(2) silicate cement, flyash, lime, phosphogypsum, trade waste, alkali-activator, hydration promoting agents, binding agent and water reducer are mixed with mud, the mass ratio accounting for dewatered sludge is respectively 20%, 25%, 10%, 6%, 2%, 15%, 2%, 10% and 2%, control the amount of external adding water, make mixture have plasticity-;
(3) manually carry out balling-up to sludge mixture, pebble-type aggregate size is about 20mm-30mm;
(4) low-alkalinity sulphoaluminate cement and gypsum are mixed according to mass ratio 1:4, add external adding water, control the degree of mobilization of consolidating material between 180mm-190mm, consolidating material and aggregate are stirred, add 1% laboratory self-control strengthening agent, layering is smash molded, is bonded to cellular concrete test block;
(5) with reference to concrete pouring standard, by cellular concrete test block maintenance 28d under normal curing condition;
(6) get natural soil and be laid in water-permeable Plant basket bottom as base soil, thickness is about 5cm;
(7) be placed on base soil by cellular concrete test block good for maintenance, slightly firmly pressing makes concrete base submerge soil;
(8) get and account for fertilizer, pearlstone, zeolite powder and the absorbent resin that natural soil mass ratio is respectively 10%, 1%, 2% and 0.2% and fully mix with natural soil, be configured to plant raw base material, between the hole being filled into cellular concrete, and suitably sprinkle water, make to plant raw base material and penetrate between the hole of lower floor;
(9) use natural soil at surface coverage top layer soil moved in improve the original, thickness is about 3cm, and soil moved in improve the original is sowed Caulis Miscanthis floriduli, Festuca Arundinacea, cogongrass and false indigo four kinds of grass seeds, needs early stage regularly watering maintenance to ensure the normal germination of plant.Grass seed selection is germinateed soon, the plant grass seeds of well developed root system, strong stress resistance.
The indices that table 3 is tested for cellular concrete test block, table 4 is each plant growth situation.
Table 3 cellular concrete test block indices
The growing state of the different plant of table 4 in imitative concrete for plant growth
Embodiment 3
(1) section, the Qinhuaihe River, Nanjing riverway sludge will be taken from and remove centrifuge dehydration after macrobead thing;
(2) silicate cement, flyash, lime, phosphogypsum, trade waste, alkali-activator, hydration promoting agents, binding agent and water reducer are mixed with mud, the mass ratio accounting for dewatered sludge is respectively 30%, 20%, 15%, 2%, 4%, 25%, 4%, 5% and 4%, control the amount of external adding water, make mixture have plasticity-;
(3) manually carry out balling-up to sludge mixture, pebble-type aggregate size is about 20mm-30mm;
(4) low-alkalinity sulphoaluminate cement and gypsum are mixed according to mass ratio 1:2, add external adding water, control the degree of mobilization of consolidating material between 180mm-190mm, consolidating material and aggregate are stirred, add 1% laboratory self-control strengthening agent, layering is smash molded, is bonded to cellular concrete test block;
(5) with reference to concrete pouring standard, by cellular concrete test block maintenance 28d under normal curing condition;
(6) get natural soil and be laid in water-permeable Plant basket bottom as base soil, thickness is about 5cm;
(7) be placed on base soil by cellular concrete test block good for maintenance, slightly firmly pressing makes concrete base submerge soil;
(8) get and account for fertilizer, pearlstone, zeolite powder and the absorbent resin that natural soil mass ratio is respectively 5%, 2%, 5% and 0.1% and fully mix with natural soil, be configured to plant raw base material, between the hole being filled into cellular concrete, and suitably sprinkle water, make to plant raw base material and penetrate between the hole of lower floor;
(9) use natural soil at surface coverage top layer soil moved in improve the original, thickness is about 3cm, and soil moved in improve the original is sowed Caulis Miscanthis floriduli, Festuca Arundinacea, cogongrass and false indigo four kinds of grass seeds, needs early stage regularly watering maintenance to ensure the normal germination of plant.Grass seed selection is germinateed soon, the plant grass seeds of well developed root system, strong stress resistance.
The indices that table 5 is tested for cellular concrete test block, table 6 is each plant growth situation.
Table 5 cellular concrete test block indices
The growing state of the different plant of table 6 in imitative concrete for plant growth
Claims (8)
1. utilize mud to prepare a method for imitative concrete for plant growth, it is characterized in that: comprise the following steps:
(1) the large-scale particulate matter in mud is removed, and centrifuge dehydration;
(2) mud after dehydration is mixed with ordinary Portland cement, flyash, lime, phosphogypsum, solid waste, alkali-activator, hydration reaction promotor, binding agent, water reducer, obtain sludge mixture;
(3) adopt artificial or mechanical means to make sludge mixture balling-up, form cobble shape aggregate of uniform size;
(4) cement, water and admixture are configured to consolidating material, with cobble shape aggregate mix and blend, add strengthening agent in whipping process, then pressure is smash in layering, makes cobble shape aggregate cementation and formation, obtains cellular concrete test block; By cellular concrete test-block standard curing;
(5) get natural soil and be laid in bottom, thickness is greater than 4cm, as base soil;
(6) cellular concrete test block good for maintenance is placed on base soil, and compacting;
(7) fill in the hole of cellular concrete test block and plant raw base material, and make to plant raw base material in cellular concrete test block surface spray water and infiltrate in the hole of cellular concrete test block depths;
(8) at cellular concrete test block Surface mulch natural soil, thickness is about 2-3cm; Obtain.
2. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, it is characterized in that: in step (1), described mud comprises river bottom mud, Marine shoal mud, dredging silt and industrial silt.
3. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, it is characterized in that: in step (2), described ordinary Portland cement, flyash, lime, phosphogypsum, solid waste, alkali-activator, hydration reaction promotor, binding agent and water reducer account for 20%-30%, 20%-25%, 10%-15%, 2%-6%, 2%-4%, 15%-25%, 2%-4%, 5%-10% and 2%-4% of dewatered sludge quality respectively.
4. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, it is characterized in that: in step (2), described solid waste is selected from one or more in cinder, blast furnace slag, slag, slag, discarded metal, building waste and glass dregs; Described alkali-activator is selected from one or more in sodium carbonate, potassium hydroxide and sodium hydroxide; Hydration reaction promotor is selected from one or more in calcium formiate, trolamine, anhydrous sodium sulphate and urea; Binding agent is selected from one or more in water glass, pitch, synthetic resins and gelatin; Water reducer is naphthalene water reducer.
5. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, it is characterized in that: in step (3), described cobble shape aggregate size is 20mm-30mm.
6. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, it is characterized in that: in step (4), described cement is silicate cement, aluminosulfate cement or aluminate class cement; Admixture is gypsum; The mass ratio of admixture and cement is 1:4-2:3; Described consolidating material degree of mobilization is 180mm-200mm; The addition of described strengthening agent is 1% of consolidating material quality.
7. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, is characterized in that: in step (4), normal curing condition is: temperature 20 DEG C ± 2 DEG C, relative humidity more than 95% maintenance 28 days.
8. a kind of method utilizing mud to prepare imitative concrete for plant growth according to claim 1, is characterized in that: in step (7), described in plant the mixture that raw base material is fertilizer, pearlstone, zeolite powder, absorbent resin and natural soil; Wherein fertilizer, pearlstone, zeolite powder and absorbent resin account for 5%-10%, 1%-2%, 2%-5% and 0.1%-0.2% of natural soil quality respectively.
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Application publication date: 20150909 |