CN108996971A - A kind of preparation method of road basement material - Google Patents
A kind of preparation method of road basement material Download PDFInfo
- Publication number
- CN108996971A CN108996971A CN201811116949.2A CN201811116949A CN108996971A CN 108996971 A CN108996971 A CN 108996971A CN 201811116949 A CN201811116949 A CN 201811116949A CN 108996971 A CN108996971 A CN 108996971A
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- China
- Prior art keywords
- aggregate
- flyash
- cement
- regenerated aggregate
- preparation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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 present invention relates to a kind of preparation methods of road basement material.Using cement and flyash as inorganic binder, waste and old concrete regenerated aggregate is used as by stabilizing material.Mixing package contains following raw material components: partial size 0 ~ 5mm recycled fine aggregate 30%-40%, partial size 5 ~ 20mm regenerated coarse aggregate 20%-35%, 20 ~ 30mm of partial size regenerated coarse aggregate 18%-25%, cement 2%-4%, flyash 5%-15%.Mixture best water consumption 9.6%-10.5%, maximum dry density 1.965-1.986g/cm3.The 7d unconfined compressive strength of base material obtained is 4-5MPa.Based on this, the present invention pays attention to make full use of regenerated aggregate resource, substitutes natural sand with recycled fine aggregate, i.e., carries out comprehensive stability using regenerated aggregate as by stabilizing material, then using cement and flyash as binder completely, prepare the road basement material met the requirements.Natural stone resource can not only be saved, save engineering cost, and natural stone resource problem in short supply can be alleviated to a certain extent, be conducive to environmental protection.
Description
Technical field
The present invention relates to a kind of road basement materials and preparation method thereof, specially cement, flyash comprehensive stability regeneration collection
The preparation method for expecting road basement material, belongs to pavement construction material field.
Background technique
With the development of economy and society, urban infrastructure updates, transformation process is accelerated, the waste and old coagulation generated therewith
Soil is also more and more, such as not effectively disposition and utilization, the problems such as bringing environmental pollution, land occupation, waste of resource.Another party
Face, with the continuous investment to infrastructure construction, the usage amount of the construction materials such as China's cement concrete is also increasing, and
Production construction material needs to exploit a large amount of natural resources, constitutes significant threat to ecological environment and natural resources.Therefore, it will give up
Old concrete after the processing such as broken, classification as gathering materials, it is all or part of to replace natural aggregate in architectural engineering, not only
Natural stone resource can be saved, save engineering cost, and natural stone resource problem in short supply can be alleviated to a certain extent,
Be conducive to environmental protection.
Waste and old concrete regenerated aggregate is applied in the base of road engineering, is to recycle waste and old concrete block on the spot,
It is used as and gathers materials after broken, classification, then add water to mix and stir with inorganic binders such as cement, lime, inorganic combination can be obtained through preparation
Expect to stablize regenerated aggregate and is used for roadbase.This can not only reduce engineering cost, but also can alleviate day to a certain extent
Right rock material resource problem in short supply.Currently, waste and old concrete recycled coarse aggregate has an application in roadbase, but there is not yet
To the report of recycled fine aggregate application.That is, merely with natural sands such as the coarse aggregate particle of partial size 5mm or more and river sands by certain
Ratio, which is mixed, matches, to obtain by stabilizing material, then obtains road basement material with cement or other stabilized with inorganic binder, and right
The partial size obtained simultaneously during production recycled coarse aggregate is then given up substantially in 0~5mm particle below not to be had to.This aspect
The regenerated aggregate resource of part is wasted, while improving the production cost of recycled coarse aggregate, on the other hand, is also created certain
The environmental pollution problem of degree is unfavorable for application and development of the waste and old concrete regenerated aggregate in roadbase.
Based on this, the present invention pays attention to make full use of regenerated aggregate resource, substitutes natural sand with recycled fine aggregate, i.e., completely
Comprehensive stability is carried out using regenerated aggregate as by stabilizing material, then using cement and flyash as binder, satisfaction is prepared and hits reality
The road basement material of the performance requirements such as performance, dry density, intensity.
Summary of the invention
The present invention provides a kind of preparation method of cement, flyash comprehensive stability regenerated aggregate road basement material, is with again
Life, which is gathered materials, carries out comprehensive stability as binder as by stabilizing material, cement and flyash, prepares a kind of performance satisfaction specification
It is required that, road basement material low in cost, low-carbon environment-friendly.
The technical scheme of the present invention is realized as follows:
A kind of preparation method of road basement material, the preparation method is as follows: adding water to mix regenerated aggregate, after mixing evenly with modeling
Material bag sealing carries out shelving and handles 1-3h；Cement, flyash, water is added in bored good material, Road Base can be obtained in uniform mixing
Layer material.
The regenerated aggregate is waste and old concrete, and the particle diameter distribution of regenerated aggregate includes being lower than 5mm, 5-20mm, 20-
30mm。
By mass percentage, partial size is lower than the regeneration collection of the regenerated aggregate of 5mm, the regenerated aggregate of 5-20mm, 20-30mm
Material, cement, flyash, water are respectively 30%-40%, 20%-35%, 18%-25%, 2%-4%, 5%-15%, 9.6%-10.5%.
Further preferably by mass percentage, partial size is lower than the regenerated aggregate of 5mm, the regenerated aggregate of 5-20mm, 20-
Regenerated aggregate, cement, flyash, the water of 30mm is respectively 36.3%, 26.4%, 19.8%, 2.5%, 15%, 10.01%.
It with water is with the 2/3-3/4 of water gross mass during the shelving, remaining is mixes and stirs process water.
The regenerated aggregate moisture content is 0, and the crush values of recycled coarse aggregate are not more than 35%, to guarantee that base material exists
The excessive regenerated aggregate particle of reason is not crushed and base is caused to destroy under load action, and the fineness modulus of recycled fine aggregate exists
Between 3.1-3.7, to ensure that recycled fine aggregate has good gradation, the packing density of regenerated aggregate is improved, so that
Base material is more stable.
The flyash uses II grade and the above flyash, wherein SiO2、Al2O3And Fe2O3Total content >=70%, SO3
Content≤30%, fineness (45 μm of square hole screens tail over≤30%), water demand ratio≤105%, f-CaO content≤1%, strength activity index
≥70%。
Invention has in place of following marked improvement:
The first, the dust and fine particle carried over after using waste and old concrete broken as the fine aggregate in roadbase,
Regenerated aggregate utilization rate is improved, completely instead of the use of sand in roadbase and stone, efficiently solves sandstone shortage, ring
The problems such as border is polluted, and further reduce costs.
The second, it gathers materials on the spot, flyash is the discarded object of power boiler discharge of power plant, is used as inorganic binder instead of one
Divide cement, can not only effectively reduce cost, and since flyash has pozzolanic activity, in the hydrogen-oxygen that hydrated cementitious generates
The excitation for changing calcium issues raw hydration reaction, generates the hydrated product with the hydraulicity, improves the strength of materials, therefore, powder
Coal ash can replace part of cement, moreover, can also further improve the long-term road of base material when cement, flyash comprehensive stability
Use performance.
Specific embodiment
Embodiment 1
A kind of road basement material, each raw material and mass percent are as follows:
Partial size ~ 5mm recycled fine aggregate 40%, 5 ~ 20mm of partial size recycled coarse aggregate 29.1%, partial size 20 ~ 30mm recycled coarse aggregate
21.8%, cement 3%, flyash 6.1%；The percentage is mass percent.
The best water consumption of the mixture is 10%, and the percentage is mass percent.
Described to use P.O42.5 cement, the flyash uses II grade and the above flyash, the recycled fine aggregate fineness
For modulus between 3.1-3.7, the recycled coarse aggregate crush values are not more than 35%.
A kind of cement, flyash comprehensive stability regenerated aggregate road basement material the preparation method comprises the following steps:
By the 0 ~ 5mm of partial size, 5 ~ 20mm, 20 ~ 30mm regenerated aggregate according to mass percent be respectively 40%, 29.1%,
21.8% is mixed evenly, then by (water consumption is to account for mixture whole in 2/3 addition Composite Aggregate of water consumption
The percentage of component gross mass, value 10%), uniform mixing simultaneously carries out shelving processing with plastic bag sealing, it is taken out after about 2h,
Cement and flyash is added in bored good material again and cement fine coal is prepared in remaining other 1/3 water consumption, uniform mixing
Grey comprehensive stability regenerated aggregate road basement material.The percentage is mass percent.
Embodiment 2
A kind of road basement material, each raw material and mass percent are as follows:
Partial size ~ 5mm recycled fine aggregate 38.3%, 5 ~ 20mm of partial size recycled coarse aggregate 27.8%, partial size 20 ~ 30mm recycled coarse aggregate
20.9%, cement 2.6%, flyash 10.4%；The percentage is mass percent.
The best water consumption of the mixture is 9.8%, and the percentage is mass percent.
Described to use P.O42.5 cement, the flyash uses II grade and the above flyash, the recycled fine aggregate fineness
For modulus between 3.1-3.7, the recycled coarse aggregate crush values are not more than 35%.
A kind of cement, flyash comprehensive stability regenerated aggregate road basement material the preparation method comprises the following steps:
By the 0 ~ 5mm of partial size, 5 ~ 20mm, 20 ~ 30mm regenerated aggregate according to mass percent be respectively 38.3%, 27.8%,
20.9% is mixed evenly, then by (water consumption is to account for mixture whole in 2/3 addition Composite Aggregate of water consumption
The percentage of component gross mass, value 9.8%), uniform mixing simultaneously carries out shelving processing with plastic bag sealing, it is taken out after about 2h,
Cement and flyash is added in bored good material again and cement fine coal is prepared in remaining other 1/3 water consumption, uniform mixing
Grey comprehensive stability regenerated aggregate road basement material.The percentage is mass percent.
Embodiment 3
A kind of road basement material, each raw material and mass percent are as follows:
Partial size ~ 5mm recycled fine aggregate 37.4%, 5 ~ 20mm of partial size recycled coarse aggregate 27.2%, partial size 20 ~ 30mm recycled coarse aggregate
20.4%, cement 2.5%, flyash 12.5%；The percentage is mass percent.
The best water consumption of the mixture is 9.8%, and the percentage is mass percent.
Described to use P.O42.5 cement, the flyash uses II grade and the above flyash, the recycled fine aggregate fineness
For modulus between 3.1-3.7, the recycled coarse aggregate crush values are not more than 35%.
A kind of cement, flyash comprehensive stability regenerated aggregate road basement material the preparation method comprises the following steps:
By the 0 ~ 5mm of partial size, 5 ~ 20mm, 20 ~ 30mm regenerated aggregate according to mass percent be respectively 37.4%, 27.2%,
20.4% is mixed evenly, then by (water consumption is to account for mixture whole in 2/3 addition Composite Aggregate of water consumption
The percentage of component gross mass, value 9.8%), uniform mixing simultaneously carries out shelving processing with plastic bag sealing, it is taken out after about 2h,
Cement and flyash is added in bored good material again and cement fine coal is prepared in remaining other 1/3 water consumption, uniform mixing
Grey comprehensive stability regenerated aggregate road basement material.The percentage is mass percent.
Embodiment 4
A kind of road basement material, each raw material and mass percent are as follows:
Partial size ~ 5mm recycled fine aggregate 36.3%, 5 ~ 20mm of partial size recycled coarse aggregate 26.4%, partial size 20 ~ 30mm recycled coarse aggregate
19.8%, cement 2.5%, flyash 15%；The percentage is mass percent.
The best water consumption of the mixture is 10.01%, and the percentage is mass percent.
Described to use P.O42.5 cement, the flyash uses II grade and the above flyash, the recycled fine aggregate fineness
For modulus between 3.1-3.7, the recycled coarse aggregate crush values are not more than 35%.
A kind of cement, flyash comprehensive stability regenerated aggregate road basement material the preparation method comprises the following steps:
By the 0 ~ 5mm of partial size, 5 ~ 20mm, 20 ~ 30mm regenerated aggregate according to mass percent be respectively 36.3%, 26.4%,
19.8% is mixed evenly, then by (water consumption is to account for mixture whole in 2/3 addition Composite Aggregate of water consumption
The percentage of component gross mass, value 10.01%), uniform mixing simultaneously carries out shelving processing with plastic bag sealing, takes after about 2h
Out, then cement and flyash is added in bored good material and cement is prepared in remaining other 1/3 water consumption, uniform mixing
Flyash comprehensive stability regenerated aggregate road basement material.The percentage is mass percent.
The dry density, best aqueous of its test block of cement, flyash comprehensive stability regenerated aggregate road basement material is detected respectively
Amount, 7d unconfined compressive strength, the results are shown in Table 1:
1 case study on implementation test data of table
The 7d unconfined compressive strength that can be seen that embodiment 1-4 from the data of above-described embodiment meets 3.5- in specification
The requirement of 4.5MPa；Cement consumption is less, more economical and environmental protection.
Claims (7)
1. a kind of preparation method of road basement material, which is characterized in that the preparation method is as follows: add water to mix regenerated aggregate,
Shelving processing 1-3h is carried out with plastic bag sealing after mixing evenly；Cement, flyash, water, uniform mixing is added in bored good material
Road basement material can be obtained.
2. the preparation method of road basement material described in claim 1, which is characterized in that the regenerated aggregate is waste and old mixed
Solidifying soil, the particle diameter distribution of regenerated aggregate include being lower than 5mm, 5-20mm, 20-30mm.
3. the preparation method of road basement material as claimed in claim 2, which is characterized in that by mass percentage, partial size is low
In regenerated aggregate, cement, flyash, the water of the regenerated aggregate of 5mm, the regenerated aggregate of 5-20mm, 20-30mm be respectively 30%-
40%、20%-35%、18%-25%、2%-4%、5%-15%、9.6%-10.5%。
4. the preparation method of road basement material as claimed in claim 2, which is characterized in that by mass percentage, partial size is low
In the regenerated aggregate of 5mm, the regenerated aggregate of 5-20mm, 20-30mm regenerated aggregate, cement, flyash, water be respectively 36.3%,
26.4%、19.8%、2.5%、15%、10.01%。
5. the preparation method of road basement material described in claim 1, which is characterized in that shelving is in the process total with water with water
The 2/3-3/4 of quality, remaining is to mix and stir process water.
6. the preparation method of road basement material described in claim 1, which is characterized in that the regenerated aggregate moisture content is
0, the crush values of recycled coarse aggregate are not more than 35%, and the fineness modulus of recycled fine aggregate is between 3.1-3.7.
7. the preparation method of road basement material described in claim 1, which is characterized in that the flyash using II grade and
The above flyash, wherein SiO2、Al2O3And Fe2O3Total content >=70%, SO3Content≤30%, 45 μm square hole screen tails over≤30%,
Water demand ratio≤105%, f-CaO content≤1%, strength activity index >=70%.
Priority Applications (1)
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|---|---|---|---|
| CN201811116949.2A CN108996971A (en) | 2018-09-25 | 2018-09-25 | A kind of preparation method of road basement material |
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|---|---|---|---|
| CN201811116949.2A CN108996971A (en) | 2018-09-25 | 2018-09-25 | A kind of preparation method of road basement material |
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| CN201811116949.2A Pending CN108996971A (en) | 2018-09-25 | 2018-09-25 | A kind of preparation method of road basement material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110981329A (en) * | 2019-11-13 | 2020-04-10 | 杭州钱江新城市政园林建设有限公司 | Fiber-reinforced cement fly ash stabilized fully-recycled brick-concrete aggregate pavement base material and preparation method thereof |
| CN111393065A (en) * | 2020-04-07 | 2020-07-10 | 东南大学 | Construction solid waste regeneration composite roadbed filler and preparation method thereof |
| CN115504728A (en) * | 2022-11-03 | 2022-12-23 | 湖南云中再生科技股份有限公司 | Cement stable regenerated aggregate mixture and preparation method thereof |
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| CN107686308A (en) * | 2017-09-18 | 2018-02-13 | 福建江夏学院 | A kind of cement stabilizing regeneration aggregate sub-surface of function admirable and preparation method thereof |
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| CN115504728A (en) * | 2022-11-03 | 2022-12-23 | 湖南云中再生科技股份有限公司 | Cement stable regenerated aggregate mixture and preparation method thereof |
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Application publication date: 20181214 |