CN106587793B - A kind of artificial aggregate, pervious concrete and preparation method that can purify road table water - Google Patents
A kind of artificial aggregate, pervious concrete and preparation method that can purify road table water Download PDFInfo
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- CN106587793B CN106587793B CN201610966611.0A CN201610966611A CN106587793B CN 106587793 B CN106587793 B CN 106587793B CN 201610966611 A CN201610966611 A CN 201610966611A CN 106587793 B CN106587793 B CN 106587793B
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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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
The invention provides a kind of artificial aggregate, pervious concrete and preparation method that can purify road table water, pervious concrete, in terms of weight fraction, it is made up of following raw material：Artificial aggregate is 65%~70%, and cement is 22%~23%, and water is 8%~12%, and the weight fraction sum of raw material is 100%.Artificial aggregate is made including following raw material：Rice hull ash, flyash, agstone, montmorillonite, white mica powder, CNT, graphene oxide, titanium dioxide, polyvinylpyrrolidone and water.There is excellent mechanical property using the artificial aggregate prepared by this method, its cylindrical compress strength is more than 7.5MPa, the basic free of losses of intensity after immersion, it is ensured that the enough structural bearing capacities of pervious concrete pavement.In addition the excellent absorption degradation performance of prepared artificial aggregate, so prepared pervious concrete not only good mechanical performance, and table water purifying effect protrusion of satisfying the need.
Description
Technical field
The invention belongs to environment-friendly type road Material Field, it is related to pervious concrete, and in particular to one kind can purify road table
Artificial aggregate, pervious concrete and the preparation method of water.
Background technology
With the fast development of highway in China Transportation Infrastructure Construction and the quickening of urbanization process, highway and city
Road network density is further encrypted, although effectively promoting the development of economic society and improving transportation accessibility, feedwater
Resource and ecological environment bring great negative effect.Due to car ownership rapid growth and highway freight drastically
It is soaring, motor vehicle exhaust emission, tire and road wear, component corrosion, grease seepage and deicer salts use phenomena such as cause
Accumulation of the pollutants such as substantial amounts of suspended particulate substance, heavy metal, nutritive salt and organic matter on road surface.Wherein suspended particulate substance SS master
Will be from particle and atmospheric falling dust etc. caused by tire wear particle, ground surface material wear particle, brake attachment means abrasion；
That content is most in heavy metal is lead Pb and zinc Zn, is mainly derived from automotive emission；Nitrogen N and phosphorus P nutrients are then main
Come from atmospheric falling dust and deicer salts etc.；Organic matter is then mainly derived from atmosphere pollution and the use of roadside agricultural chemicals etc..
Once producing rainfall, these pollutants dissolve in pavement runoff under the souring of rainwater on road surface, and wherein most pollutant is all
It will be directly discharged to by the mode such as drainage pipeline networks and side slope cross flow in the soil of surface water body and Highways ', cause Ecology
Destruction and the pollution of Soil Surrounding.
Meanwhile China water resource occupancy volume per person only has the 1/4 of global average value, the 121st, the world is come, belongs to 13
One of poor-water country.Road table water pollution more exacerbates China's shortage of water resources, directly threatens safety and the people of drinking water
Health, and further threatened industry and the production of agricultural.Therefore work as highway one-level by Drinking Water earth surface water source
When protection zone and second protection zone, it is necessary to which the table rainfall runoff that satisfies the need is punished, and pollutant catabolic gene index is met country《Earth's surface
Quality standard of water environment》It can be discharged after (GB 3838-2002) requirement.
With the development of Ecological Civilization Construction and the raising of environmental consciousness, harm caused by the pollution of China's pavement runoff is
Especially paid close attention to.At present, the pollution control measures for pavement runoff feature can be divided mainly into non-engineering measure and engineering is arranged
Apply punishment.Wherein, non-engineering measure, which mainly has, strengthens highway transport management, cleans road surface and limits use of deicer salts etc.；Work
Journey measure mainly has afforestation vegetation control, making drainage pavement and builds delaying basin, oxidation pond, osmosis system and artificial swamp
Deng auxiliary facility etc..Although certain effect has all been got in these measures, non-engineering measure can greatly improve the maintenance of road
Administration fee, the making drainage pavement purification adsorption effect of heavy metal and organic pollution in table water that satisfies the need is very limited, and builds
The auxiliary facilities such as delaying basin then typically can additionally increase engineering cost, and increase difficulty is promoted to construction.Therefore, based on above present situation
A kind of ground surface material with road table water purifying function to be developed, construction costs can be reduced, and can reduces maintenance cost,
With vast potential for future development.
The content of the invention
In view of the deficienciess of the prior art, the artificial of road table water can be purified it is an object of the present invention to provide a kind of
Aggregate, pervious concrete, the problem of for existing during the above state of the art and pavement runoff prevention and cure of pollution, need exploitation one badly
Ground surface material of the kind with excellent road table water pollutant purification function, passes through the filtering and suction-operated of pavement structure and material
The polluters such as suspended particulate substance, heavy metal and nutrients in road pavement runoff play a part of interception, so as to reach purification
Effect.The material is proposed for purification roadside groundwater resources, preserves the ecological environment significant.
It is an object of the invention to provide the preparation side of a kind of artificial aggregate that can purify road table water, pervious concrete
Method, the artificial aggregate that the invention provides has the excellent properties of high-strength light, and its coefficient of softing is more than or equal to 0.98, so as to
The pavement performance of pervious concrete prepared by guarantee, permeable and clean effect is taken into account, it is economic and environment-friendly, before there is wide development
Scape.
In order to solve the above-mentioned technical problem, the present invention, which adopts the following technical scheme that, is achieved：
A kind of artificial aggregate that can purify road table water, including following raw material are made：Rice hull ash, flyash, lime stone
Powder, montmorillonite, white mica powder, CNT, graphene oxide, titanium dioxide, polyvinylpyrrolidone and water.
The present invention also has following distinguishing feature：
Specifically, in terms of weight fraction, it is made up of following raw material：Rice hull ash is 20%~30%, flyash 10%
~15%, agstone is 5%~8%, and montmorillonite is 15%~20%, and white mica powder is 15%~20%, and CNT is
0.8%~1.5%, graphene oxide is 0.1%~0.5%, and titanium dioxide is 0.5%~1.0%, and polyvinylpyrrolidone is
0.1~0.3%, surplus is water, and the percetage by weight sum of raw material is 100%.
Preferably, in terms of weight fraction, it is made up of following raw material：Rice hull ash is 27%, flyash 10%, lime stone
Powder is 5%, montmorillonite 15%, white mica powder 18%, CNT 1.5%, graphene oxide 0.1%, titanium dioxide
Titanium is 0.8%, polyvinylpyrrolidone 0.3%, water 22.3%.
A kind of preparation method for the artificial aggregate that can purify road table water, this method uses can purify road as described above
The formula of the artificial aggregate of table water, this method specifically include following steps：
Step 1, above-mentioned each raw material are weighed by quality；
Step 2, the water of alleged 50% formula dosage is put into container, polyvinylpyrrolidone is added, is stirred using magnetic force
Device stirring 2min is mixed, CNT, graphene oxide and titanium dioxide is then added, continues magnetic agitation 10min, obtain uniformly
Aqueous dispersion A；
Step 3, rice hull ash, flyash, agstone, montmorillonite and white mica powder are added sequentially in mixer, opened
Dynamic mixer, first stirring at low speed 120s, then high-speed stirred 120s；
Wherein in 60s~70s, the water that residue 50% is formulated dosage is added, when this time stirring stops, by paddle
Mixture with cleaning scraper scrape；
Step 4, the aqueous dispersion A prepared in advance is added in agitated kettle in 10s, and continues stirring at low speed 60s,
Then high-speed stirred 60s, the artificial aggregate matrix material B with road table water purifying function is obtained after stirring；
Step 5, matrix material B is put into the spheric granules C that nodulizer is prepared into 5~20mm of particle diameter；
Step 6, spheric granules C is put into rotary kiln, preheats 10min at 500~600 DEG C first, then using 1300~
1400 DEG C of conditions sinter 15~20min, after the completion of in 5min temperature be reduced to 1000~1100 DEG C and be incubated 20min, then
Temperature is reduced to 500~600 DEG C and is incubated 20min in 10min, is finally cooled to normal temperature, that is, obtains that road table water can be purified
Artificial aggregate.
A kind of pervious concrete that can purify road table water, in terms of weight fraction, it is made up of following raw material：Artificial aggregate
For 65%~70%, cement is 22%~23%, and water is 8%~12%, and the weight fraction sum of raw material is 100%；
Described artificial aggregate is using the artificial aggregate as described above for enough purifying road table water.
Preferably, in terms of weight fraction, it is made up of following raw material：Artificial aggregate is 65%, cement 23%, and water is
12%.
A kind of preparation method for the pervious concrete that can purify road table water, it is characterised in that this method is using as above institute
That states can purify the composition of raw materials of the pervious concrete of road table water, and detailed process is：By artificial aggregate and cement dry mixing 30s,
Then water stirring 60s is added, you can obtain purifying the pervious concrete of road table water.
The present invention compared with prior art, has the following technical effect that：
(I) graphene oxide of the present invention contains substantial amounts of hydroxyl, carboxyl isoreactivity functional group, in fine coal
Template effect and filling effect can be induced during ash, rice hull ash and white mica powder etc. are ingredient melting, to quartz and mullite etc.
The shape of mineral facies has a template action, forms lamination shape, cross one another microcrystal, and improves viscous at short texture and hole
Knot, it is set to play a part of increasing toughness.It is used cooperatively with titanium dioxide, material internal crystallization Nucleation mesh is gradually increased
Add, the generation of mineral crystal during acceleration of sintering, the crystal content increase formed after crystallization, crystal even compact, product
Compactness extent gradually increases, and shows as chemical stability and improves, and hardness and intensity are lifted.Simultaneously as CNT
Intensity and toughness it is high, its modulus of elasticity and diamond almost phase, can be with so the addition of graphene oxide and CNT
Its filling effect and the bridge linking effect to artificial aggregate mineral facies are given full play to, so the comprehensive function of factors above makes artificial bone
The mechanical property of material significantly improves.
(II) artificial aggregate internal void provided by the invention is flourishing, and pore diameter is generally higher than 40 μm, and skeleton is sturdy, profit
In the infiltration of the polluters such as suspended particulate substance, heavy metal and nutrients, adsorption effect is improved.White mica powder and rice hull ash are mixed
Enter the blocking that can reduce fly vitreous to artificial aggregate surface pore.Also, used graphene oxide has very big
Specific surface area, the activity functional groups contained by it not only increase its dispersiveness, and for various dirts in the table water of road
Dye thing plays a part of adsorption site.In addition the catalytic degradation effect of titanium dioxide can obviously improve the ion friendship of porous aggregate
Change, heavy metal element, organic pollution and N, P nutrients in physical absorption and double decomposition precipitation effect absorption rainwater.Therefore,
Prepared artificial aggregate has excellent absorption degradation effect.
(III) 10min is preheated at 500~600 DEG C first in the sintering process of artificial aggregate, can prevents having in raw material
Volatilization, decomposition and burning of the machine thing component in sintering process, it is avoided to the mineralogical composition decomposition reaction such as carbonate, sulfate
Interference, and ensure the purity of aluminium silicate mineral phase；Faster cooling velocity, Ke Yibao are taken between 1000 DEG C~1100 DEG C
More mineral facies generations are demonstrate,proved, solid structural framework is formed, improves the intensity of artificial aggregate；Between 500 DEG C~600 DEG C, adopt
With slower cooling velocity, the caused volumetric expansion of hexagonal columnar crystal habit transformation can be prevented and cause to split inside and outside aggregate
Increasing for seam, so as to ensure the intensity of artificial aggregate, and improves its surface smoothness.
(IV) there is excellent mechanical property using the artificial aggregate prepared by this method, its cylindrical compress strength is more than
7.5MPa, the basic free of losses of intensity after immersion, it is ensured that the enough structural bearing capacities of pervious concrete pavement.In addition prepared people
The excellent absorption degradation performance of work aggregate, so prepared pervious concrete not only good mechanical performance, and the table water that satisfies the need
Clean-up effect protrudes.
Explanation is further explained in detail to the particular content of the present invention with reference to embodiments.
Embodiment
In following embodiments, the specification requirement of each raw material is as described below：
Rice hull ash is black powder, SiO2Mass content >=90%, proportion are 2.1~2.3, and particle diameter is 0~0.075mm.
Flyash is II level high calcium ash, its CaO and total mass content >=65% of MgO.
Agstone is white powder, and particle diameter is 0~0.075mm, CaCO3Mass content >=90%, MgO mass content≤
4%.
Montmorillonite is calcium-base montmorillonite, white powder, and its granularity is 200 mesh, Al2O3Mass content is 16%~20%,
SiO2Mass content is that 50%~55%, CaO mass contents are 2%~5%.
White mica powder is buff powder, and its granularity is 300 mesh, SiO2Mass content is 45%~50%, K2O mass contains
Measure as 9%~10%.
CNT is black powder double-walled carbon nano-tube, its purity>60%, external diameter is 2~4nm, internal diameter is 1~
3nm, length are 40~50 μm, and-OH mass contents are 2.9%~3.1%.
Graphene oxide is amber powder, its purity>97wt%, 0.55~2.0nm of thickness, 3~10 μm of diameter, layer
Number：<5 layers.
Titanium dioxide is white powder, high-purity nanometer anatase titania, its purity>97wt%, average grain diameter are
10nm, water slurry pH value are 6.0~9.0.
Polyvinylpyrrolidone is off-white powder, and its K value is 27~32, and solid content is >=95%, and pH value is 3~5.
Cement is the Portland cement of 42.5 strength grades.
Water is common drinking water.
Specific embodiment of the invention given below is, it is necessary to which explanation is that the invention is not limited in implement in detail below
Example, all equivalents done on the basis of technical scheme each fall within protection scope of the present invention.
Embodiment 1：
The present embodiment provides a kind of artificial aggregate that can purify road table water, in terms of weight fraction, by following raw material system
Into：Rice hull ash is 20%, flyash 15%, agstone 8%, montmorillonite 20%, white mica powder 20%, carbon nanometer
Manage as 1.0%, graphene oxide 0.2%, titanium dioxide 0.5%, polyvinylpyrrolidone 0.2%, water 15.1%.
The preparation method of the artificial aggregate that road table water can be purified of the present embodiment comprises the following steps：
Step 1, above-mentioned each raw material are weighed by quality；
Step 2, the water of alleged 50% formula dosage is put into container, polyvinylpyrrolidone is added, is stirred using magnetic force
Device stirring 2min is mixed, CNT, graphene oxide and titanium dioxide is then added, continues magnetic agitation 10min, obtain uniformly
Aqueous dispersion A.
Step 3, rice hull ash, flyash, agstone, montmorillonite and white mica powder are added sequentially in mixer, opened
Dynamic mixer, first stirring at low speed 120s, then high-speed stirred 120s；
Wherein in 60s~70s, the water that residue 50% is formulated dosage is added, when this time stirring stops, by paddle
Mixture with cleaning scraper scrape.
Step 4, the aqueous dispersion A prepared in advance is added in agitated kettle in 10s, and continues stirring at low speed 60s,
Then high-speed stirred 60s, the artificial aggregate matrix material B with road table water purifying function is obtained after stirring.
Step 5, matrix material B is put into the spheric granules C that nodulizer is prepared into 5~20mm of particle diameter.
Step 6, spheric granules C is put into rotary kiln, preheats 10min at 500~600 DEG C first, then using 1300~
1400 DEG C of conditions sinter 15~20min, after the completion of in 5min temperature be reduced to 1000~1100 DEG C and be incubated 20min, then
Temperature is reduced to 500~600 DEG C and is incubated 20min in 10min, is finally cooled to normal temperature, that is, obtains that road table water can be purified
Artificial aggregate.
The performance test results of the present embodiment are shown in Table 1.
Embodiment 2：
The present embodiment provides a kind of artificial aggregate that can purify road table water, in terms of weight fraction, by following raw material system
Into：Rice hull ash is 27%, flyash 10%, agstone 5%, montmorillonite 15%, white mica powder 18%, carbon nanometer
Manage as 1.5%, graphene oxide 0.1%, titanium dioxide 0.8%, polyvinylpyrrolidone 0.3%, water 22.3%.
The preparation method of the artificial aggregate that road table water can be purified of the present embodiment is same as Example 1.
The performance test results of the present embodiment are shown in Table 1.
Embodiment 3：
The present embodiment provides a kind of artificial aggregate that can purify road table water, in terms of weight fraction, by following raw material system
Into：Rice hull ash is 30%, flyash 12%, agstone 6%, montmorillonite 18%, white mica powder 15%, carbon nanometer
Manage as 0.8%, graphene oxide 0.5%, titanium dioxide 1.0%, polyvinylpyrrolidone 0.1%, water 16.6%.
The preparation method of the artificial aggregate that road table water can be purified of the present embodiment is same as Example 1.
The performance test results of the present embodiment are shown in Table 1.
Comparative example 1：
This comparative example provides a kind of artificial aggregate, and described artificial aggregate is high-strength ceramic granule, the grain of selected high-strength ceramic granule
Footpath is 5~20mm, continuous grading.
The specific the performance test results of this comparative example are referring to table 1.
Comparative example 2：
This comparative example provides a kind of natural aggregate, and described natural aggregate is limestone gravel, selected limestone gravel
Particle diameter be 5~20mm, continuous grading.
The preparation method of this comparative example is the same as embodiment 1.
The specific the performance test results of this comparative example are referring to table 1.
Embodiment 4：
The present embodiment provides a kind of pervious concrete that can purify road table water, in terms of weight fraction, by following raw material
It is made：Artificial aggregate is 67%, cement 22%, water 11%；
Described artificial aggregate is using the artificial aggregate that can purify road table water described in embodiment 1.
The preparation method of the pervious concrete that road table water can be purified of the present embodiment is：By artificial aggregate and cement dry mixing
30s, then add water stirring 60s, you can obtain purifying the pervious concrete of road table water.
The specific the performance test results of the present embodiment are referring to table 2.
Embodiment 5：
The present embodiment provides a kind of pervious concrete that can purify road table water, in terms of weight fraction, by following raw material
It is made：Artificial aggregate is 65%, cement 23%, water 12%；
Described artificial aggregate is using the artificial aggregate that can purify road table water described in embodiment 2.
The preparation method of the pervious concrete that road table water can be purified of the present embodiment is same as Example 4.
The specific the performance test results of the present embodiment are referring to table 2.
Embodiment 6：
The present embodiment provides a kind of pervious concrete that can purify road table water, in terms of weight fraction, by following raw material
It is made：Artificial aggregate is 70%, cement 22%, water 8%；
Described artificial aggregate is using the artificial aggregate that can purify road table water described in embodiment 3.
The preparation method of the pervious concrete that road table water can be purified of the present embodiment is same as Example 4.
The specific the performance test results of the present embodiment are referring to table 2.
Comparative example 3：
This comparative example provides a kind of pervious concrete, in terms of weight fraction, is made up of following raw material：High-strength ceramic granule
67%, cement 22%, water 11%.
The particle diameter of selected high-strength ceramic granule is 5~20mm, continuous grading.
The preparation method of this comparative example is the same as embodiment 4.
The specific the performance test results of this comparative example are referring to table 2.
Comparative example 4：
This comparative example provides a kind of pervious concrete, in terms of weight fraction, is made up of following raw material：Limestone gravel
70%, cement 22%, water 8%.
The particle diameter of selected limestone gravel is 5~20mm, continuous grading.
The preparation method of this comparative example is the same as embodiment 4.
The specific the performance test results of this comparative example are referring to table 2.
Performance test：
Pervious concrete prepares after-pouring shaping 150mm test cube, then standard curing to 28d ages.
It is artificial prepared by test respectively with reference to the requirement of GB/T 17431.2-2010 and JTG E30-2005 respective standards
The bulk density of aggregate, cylindrical compress strength and coefficient of softing, and the compression strength of pervious concrete and pervious concrete are effective
Voidage, and the sewage purification absorption effect of using plasma atomic emission spectrometry and potassium dichromate method analysis pervious concrete
Fruit.Used experiment water sample is by plumbi nitras, zinc nitrate hexahydrate and cured leaf according to pavement runoff pollutant component and quantity
Extract etc. is formulated indoors.The test result of each embodiment and comparative example is summarized in Tables 1 and 2.
The aggregate performance test result of table 1
The pervious concrete the performance test results of table 2
As it can be seen from table 1 although the bulk density of 1~embodiment of embodiment 3 is only than 1 high grade of comparative example,
Its cylindrical compress strength and coefficient of softing are far above comparative example 1, illustrate that there is the present invention excellent mechanical property and intensity to keep energy
Power.And purification adsorption effect of the 1~embodiment of embodiment 3 to rainwater will be far above comparative example 1 and comparative example 2.
From table 2 it can be seen that although to be less than comparative example 4 (common permeable mixed for the compression strength of 4~embodiment of embodiment 6
Solidifying soil), but it is far above comparative example 3, and its effective porosity differs very little with comparative example 3 and comparative example 4, illustrates there is foot
Enough pavement structure bearing capacities and water permeability, road surface runoff can be excluded rapidly.And the Pb of 4~embodiment of embodiment 6 is removed
Rate, Zn clearances and COD clearance indexs are significantly larger than comparative example 3 and comparative example 4, illustrate using artificial bone provided by the invention
The prepared pervious concrete of the material table water that satisfies the need has excellent clean-up effect.
Based on the above results as can be seen that artificial aggregate and pervious concrete prepared by the present invention not only mechanical property is excellent
It is good, and the pollutant in road surface runoff can be effectively removed, it can significantly alleviate pavement runoff draining pollution problem, have well
Social benefit, development prospect are wide.
Claims (7)
1. a kind of preparation method for the artificial aggregate that can purify road table water, it is characterised in that described can purify road table water
Artificial aggregate in terms of weight fraction, be made up of following raw material：Rice hull ash be 20%~30%, flyash be 10%~
15%, agstone is 5%~8%, and montmorillonite is 15%~20%, and white mica powder is 15%~20%, and CNT is
0.8%~1.5%, graphene oxide is 0.1%~0.5%, and titanium dioxide is 0.5%~1.0%, and polyvinylpyrrolidone is
0.1~0.3%, surplus is water, and the percetage by weight sum of raw material is 100%；
This method specifically includes following steps：
Step 1, above-mentioned each raw material are weighed by quality；
Step 2, the water of alleged 50% formula dosage is put into container, polyvinylpyrrolidone is added, using magnetic stirring apparatus
2min is stirred, then adds CNT, graphene oxide and titanium dioxide, continues magnetic agitation 10min, is uniformly divided
Aproll solution A；
Step 3, rice hull ash, flyash, agstone, montmorillonite and white mica powder are added sequentially in mixer, starts and stirs
Mix machine, first stirring at low speed 120s, then high-speed stirred 120s；
Wherein in 60s~70s, the water that residue 50% is formulated dosage is added, will be mixed on paddle when this time stirring stops
Compound is scraped with the scraper of cleaning；
Step 4, the aqueous dispersion A prepared in advance is added in agitated kettle in 10s, and continue stirring at low speed 60s, then
High-speed stirred 60s, the artificial aggregate matrix material B with road table water purifying function is obtained after stirring；
Step 5, matrix material B is put into the spheric granules C that nodulizer is prepared into 5~20mm of particle diameter；
Step 6, spheric granules C is put into rotary kiln, preheats 10min at 500~600 DEG C first, then using 1300~1400
DEG C condition sinters 15~20min, after the completion of in 5min temperature be reduced to 1000~1100 DEG C and be incubated 20min, Ran Hou
Temperature is reduced to 500~600 DEG C and is incubated 20min in 10min, is finally cooled to normal temperature, that is, obtains that road table water can be purified
Artificial aggregate.
2. the preparation method of the artificial aggregate of road table water can be purified as claimed in claim 1, it is characterised in that described energy
The artificial aggregate of road table water is enough purified in terms of weight fraction, is made up of following raw material：Rice hull ash is 27%, and flyash is
10%, agstone 5%, montmorillonite 15%, white mica powder 18%, CNT 1.5%, graphene oxide is
0.1%, titanium dioxide 0.8%, polyvinylpyrrolidone 0.3%, water 22.3%.
3. a kind of pervious concrete that can purify road table water, it is characterised in that in terms of weight fraction, by following raw material system
Into：Artificial aggregate is 65%~70%, and cement is 22%~23%, and water is 8%~12%, and the weight fraction sum of raw material is
100%；
Described artificial aggregate use can purify the artificial aggregate of road table water, the described artificial aggregate that can purify road table water
In terms of weight fraction, it is made up of following raw material：Rice hull ash is 20%~30%, and flyash is 10%~15%, agstone
For 5%~8%, montmorillonite is 15%~20%, and white mica powder is 15%~20%, and CNT is 0.8%~1.5%, oxygen
Graphite alkene is 0.1%~0.5%, and titanium dioxide is 0.5%~1.0%, and polyvinylpyrrolidone is 0.1~0.3%, surplus
For water, the percetage by weight sum of raw material is 100%.
4. the pervious concrete of road table water can be purified as claimed in claim 3, it is characterised in that described can purify road
The artificial aggregate of table water is made up in terms of weight fraction of following raw material：
Rice hull ash is 27%, and flyash 10%, agstone 5%, montmorillonite 15%, white mica powder 18%, carbon is received
Mitron is 1.5%, graphene oxide 0.1%, titanium dioxide 0.8%, polyvinylpyrrolidone 0.3%, and water is
22.3%.
5. the pervious concrete as described in claim 3 or 4, it is characterised in that in terms of weight fraction, by following raw material system
Into：Artificial aggregate is 65%, cement 23%, water 12%.
6. a kind of preparation method for the pervious concrete that can purify road table water, it is characterised in that this method uses right such as will
The composition of raw materials of the pervious concrete that can purify road table water described in 3 is sought, detailed process is：By artificial aggregate and cement dry mixing
30s, then add water stirring 60s, you can obtain purifying the pervious concrete of road table water.
7. a kind of preparation method for the pervious concrete that can purify road table water, it is characterised in that this method uses right such as will
The composition of raw materials of the pervious concrete that can purify road table water described in 5 is sought, detailed process is：By artificial aggregate and cement dry mixing
30s, then add water stirring 60s, you can obtain purifying the pervious concrete of road table water.
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| CN112851237A (en) * | 2021-01-20 | 2021-05-28 | 湖北工建科技产业投资有限公司 | Cement-based permeable crystallization waterproof anticorrosive material without maintenance |
| CN114195441B (en) * | 2021-12-28 | 2022-08-26 | 中国科学院、水利部成都山地灾害与环境研究所 | Microporous two-stage adsorption concrete product, preparation method and application thereof |
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