CN109320285A - A kind of white cement pervious concrete that miberal powder is modified - Google Patents
A kind of white cement pervious concrete that miberal powder is modified Download PDFInfo
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- CN109320285A CN109320285A CN201811243630.6A CN201811243630A CN109320285A CN 109320285 A CN109320285 A CN 109320285A CN 201811243630 A CN201811243630 A CN 201811243630A CN 109320285 A CN109320285 A CN 109320285A
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- white cement
- miberal powder
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- pervious concrete
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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
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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
- 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
- C04B2111/40—Porous or lightweight materials
-
- 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 field of road construction, specifically disclose a kind of white cement pervious concrete that miberal powder is modified, which handles to obtain using raw material through mixing；The raw material includes accounting for the rubble coarse aggregate that raw material total quality percentage is 71.79~78.63wt%, the cementitious material of 16.13~21.54wt%, cementitious material is that white cement and miberal powder are mixed to get according to mass ratio 8:2~6:4, the water of 5.00~6.46wt%, the water-reducing agent of 0.18~0.28wt%, the water-cement ratio of both water and cementitious material is 0.29~0.31, and the mass ratio of water-reducing agent and cementitious material is (0.0095~0.0150): 1；Its design porosity of the modified white cement pervious concrete of the miberal powder is 15.0~20.0%.The present invention is improved by the component etc. to concrete key, cementitious material is used as together with white cement using miberal powder, manufacture and design the modified white cement pervious concrete of miberal powder, improves pervious concrete intensity, while the use of white cement ensure that the economic and practical of pervious concrete.
Description
Technical field
The invention belongs to field of road construction, more particularly, to a kind of modified white cement pervious concrete of miberal powder, originally
Invention particularly provides the matching method suitable for the modified white cement pervious concrete of miberal powder, and it is whole to make it have good concrete
Body intensity and water penetration especially can be used as paving material application accordingly.
Background technique
With the development of the global economy, urban scale structure changes, and to guarantee the smooth hard of building, waterproof pavement exists
Accounting is increasing in city, and the vegetation earth's surface of script is covered by the very poor concrete building of various water penetrations, cement and asphalt road surface
Lid, urban ecology is gradually unbalance: tropical island effect increasingly aggravates, and cities and towns humidity reduces, and but waterlogging takes place frequently during rainfall, and rainwater lacks
Vegetation soil purification, water ecological environment, which deteriorate ... influences going deep into for utility strategies with low, and permeable pavement is saturating to city is increased
Water area alleviates rainwash, prevents the generation of urban waterlogging, improves city water cycle, and rehabilitating soil ecological environment promotes city
City's natural environment, maintenance balance of city ecosystem have significant role.
Pervious concrete is also referred to as celluar concrete, wraps up coagulated material using coarse aggregate, forms honeycomb each other
There is excellent performances, the adjustable runoffs such as high permeable, strong ventilative, sqouynd absorption lowering noise to purify water, be as paving for structure
Excellent material, to balance Urban Water Environment, maintenance Ecology be of great significance.With pushing away for city sponge urban construction
Into, pervious concrete is used in the various aspects of urban construction, and normal concrete is mostly grey black, and color is dull,
It is difficult to meet urban landscape demand, colorful water-permeable concrete gradually rises, because of white cement easy dyeing therefore mostly in pervious concrete system
It is used during making as cementitious material, it is simple to dye and save dyestuff, it can reduce cost of manufacture, but the permeable coagulation of white cement
Soil mechanical property, in terms of it is ineffective, during actual use exist unit cost of mating formation is high, grain is fallen on surface,
The problems such as hollowing, it is difficult to meet demand.
Inventor has obtained a kind of white cement pervious concrete and preparation method thereof (reference can be made to China in preceding research
Patent document CN108546033A), although also disclosed white cement pervious concrete both can guarantee the integral strength of concrete for it,
It can make concrete that there is good water penetration again, but purely use white cement at high cost as cementitious material, and do not using
Later strength is not high in the case of synergist, and there is also the spaces that performance is further promoted for the preparation of white cement pervious concrete.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the purpose of the present invention is to provide a kind of the white of miberal powder modification
Cement pervious concrete, wherein being carried out by the component (the specific type and corresponding proportion of such as raw material) to concrete key
It improves, cementitious material is used as together with white cement using miberal powder, manufacture and design the modified white cement pervious concrete of miberal powder, existing
Under the premise of technology, pervious concrete intensity is improved, while the use of white cement ensure that the economical and practical of pervious concrete
Property.The present invention carries out strict control by the proportion of the constituent to white cement pervious concrete, by white cement and miberal powder
Mass ratio control is 8:2~6:4, makes the compression strength of pervious concrete and coefficient of permeability that can reach preferable level, actual apertures
The modified white cement pervious concrete of the miberal powder that gap rate is 15.2~22.7%, can meet in Practical Project to concrete to permeable and
The double requirements of intensity had not only guaranteed the integral strength of concrete, but also concrete can be made to have good water penetration, were conducive to tie up
Protect the ecological, environmental protective in city.
To achieve the above object, it is proposed, according to the invention, provide a kind of white cement pervious concrete that miberal powder is modified, feature
It is, handles to obtain through mixing using raw material；The raw material include account for raw material total quality percentage be 71.79~
The rubble coarse aggregate of 78.63wt% accounts for the cementitious material of the whole 16.13~21.54wt% of raw material, account for raw material whole 5.00~
The water-cement ratio of both the water of 6.46wt%, water and cementitious material is 0.29~0.31, accounts for the whole 0.18~0.28wt%'s of raw material
The mass ratio of water-reducing agent, water-reducing agent and cementitious material is (0.0095~0.0150): 1；Wherein, the rubble coarse aggregate is specially
Partial size is more than or equal to 2.35mm and is less than or equal to the small particle aggregate of 4.75mm, or is greater than 4.75mm for partial size and is less than or equal to
The large-particle-size aggregate of 9.50mm, or shape is uniformly mixed by 1:1 mass ratio with the large-particle-size aggregate for the small particle aggregate
At gradation partial size aggregate；The cementitious material is specially that white cement and miberal powder are mixed according to what mass ratio 8:2~6:4 was mixed to get
Close object；
In addition, its design porosity of the white cement pervious concrete of miberal powder modification is 15.0~20.0%.
As present invention further optimization, the rubble coarse aggregate is derived from natural mountain stone；Described its heap of small particle aggregate
Product density is 1600~1800kg/m3, apparent density is 2500~2800kg/m3, porosity is 35.0~36.5%；It is described big
Its bulk density of partial size aggregate is 1511~1700kg/m3, apparent density is 2583~2830kg/m3, porosity be 38.5~
41.5%；Its bulk density of the gradation partial size aggregate is 1570~1790kg/m3, apparent density is 2465~2740kg/m3,
Porosity is 34.1~36.3%.
As present invention further optimization, the white cement ingredient is based on calcium silicates, strength grade P.W42.5,
2900~3200kg/m of apparent density3。
As present invention further optimization, the miberal powder is that the iron tailings after iron mine beneficiation grinds miberal powder, apparent close
Degree is 2500~2728kg/m3。
As present invention further optimization, its main chemical compositions of the miberal powder and mass percentage are as follows:
As present invention further optimization, the water-reducing agent be polycarboxylic acids liquid water-reducing agent, preferably maleic anhydride,
Acrylate polyethylene glycol monoester, acrylic sodium sulfonate, K2S2O8In one or more mixture, the polycarboxylic acids liquid water-reducing agent
Density be preferably 1g/mL.
As present invention further optimization, the mixing processing is that secondary charging method mechanical forced stirs, preferably
Material is added for secondary charging method, and is stirred using mechanical forced.
Contemplated above technical scheme through the invention, compared with prior art, by the reasonable of concrete material
Proportion is controlled white cement and powdered ore quality ratio for 8:2 using the overall co-ordination between each raw material matched in specific proportions
~6:4 controls the glue mass ratio in raw material for (0.29~0.31): 1, the mass ratio control of water-reducing agent and cement is
(0.0095~0.0150): 1, it can obtain excellent white cement pervious concrete, design porosity meets 15.0~
20.0%, actual porosity is 15.2~22.7%, and has good compression strength and coefficient of permeability, and being finally reached can subtract
Few cement consumption, meets practice of construction economic needs, and can achieve the purpose that concrete strength requirement, can meet engineering conscientiously
Actual needs in use can be used as the application of Municipal Route for pedestrians concrete permeable road surface.
The present invention is using the modified existing white cement pervious concrete of miberal powder, by miberal powder substitution part white cement, and and its
The white cement of remaining part point is used as cementitious material (mass ratio of white cement and miberal powder is 8:2~6:4 in the cementitious material) together, with
Other raw materials together, can concrete strength to white cement pervious concrete and water permeable ability etc. play modifying function.
Due to the volcano ash effect, filing effect and micro aggregate effect of miberal powder.It can be with the hydrated product after hydrated cementitious in concrete
Generate secondary hydration, the active SiO in miberal powder2And Al2O3Equal silicate glasses body, with alkali-activator Ca (OH)2Occur anti-
It answers, generates hydrated calcium silicate and drated calcium aluminate, concrete strength is promoted to increase.Miberal powder is smaller than cement granules, permeable mixed
The gap between cement granules is largely filled in solidifying soil, the gradation and workability for improving cementitious matter make in whipping process
Cement slurry can more fully be wrapped in aggregate surface, while keep the mixing of mix material more uniform, and test block can form
It accumulates in the process more closely knit, obtains bigger compression strength.Miberal powder is filled in behind gap and will be strapped in moisture therein and set
It swaps out and, this partial moisture can be with, while continuing react productions with cement, the promotion abundant aquation of cement, and increase concrete is finally
Structural strength.
For the present invention by applying miberal powder in pervious concrete, cooperation utilizes the rubble coarse aggregate of specified particle diameter range
(note aggregate size x, when x meets 2.35mm≤x≤4.75mm aggregate be small particle aggregate, when x meet 4.75mm < x≤
Aggregate is large-particle-size aggregate when 9.50mm), by using small particle aggregate, large-particle-size aggregate or small particle aggregate and big partial size
The gradation partial size aggregate that aggregate is uniformly mixed to form by 1:1 mass ratio, in the case where not using synergist, it can be achieved that having good
The white cement pervious concrete of good effect, it is seen that these miberal powders can effectively improve the performance of pervious concrete.
Its calculating for designing porosity of pervious concrete meets CJJ/T135-2009 " water-permeable cement concrete in the present invention
Pavement technique regulation " in it is related record, using these corresponding specification, formula etc. in the prior art, by the aggregate of addition,
Cementitious material, water, the ratio of additive, density etc. can calculate design porosity (since the present invention is to replace part using miberal powder
As cementitious material, miberal powder can return in the same class of cement to be calculated white cement；For example, first being pressed when porosity calculates
Calculate gelling gross mass according to cement density, after with mass substitutions such as miberal powders)；Also, due to tamping intensity, measurement error etc., if
It counts porosity and actual porosity is not identical, effective porosity can be calculated by Seepage Experiment in the present invention.
Pervious concrete provided by the invention has obtained the permeable coagulation of white cement of function admirable by reasonably matching
Soil, with reference to the survey in " water-permeable cement concrete pavement technique regulation " (CJJ/T 135-2009) and " water-permeable brick " (JCT 945)
Method for testing, the test cube of a length of 150mm of opposite side tests compression strength respectively, to the cylindrical body of diameter 100mm height 50mm
Permeability rate is tested in test block, the results showed that when miberal powder and white cement mass ratio are (2:8~4:6), compression strength be can reach within 28 days
18MPa or more, particularly, when miberal powder is 3:7 with white cement mass ratio, compression strength can reach 20MPa or more within 28 days；It is permeable
For coefficient in 0.4cm/s or more, comprehensive performance is best, meets national requirements, and meets pervious concrete in engineering use
It needs, may advantageously facilitate sustainable development.
The present invention provides pervious concretes made of white cement, not only have excellent physical mechanical property, more consider
The demand of landscape beauty uses the white cement of easy coloring completely, by suitably matching, in the premise for guaranteeing concrete strength
Under, the dosage in dyeing course to dyeing pigment is effectively reduced, controls overall cost, there is practical popularization significance.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below each other it
Between do not constitute conflict and can be combined with each other.
Embodiment 1
Raw material used by the present embodiment is as follows:
Partial size is 2.35~4.75mm (that is, partial size is more than or equal to 2.35mm and is less than or equal to 4.75mm), and bulk density is
1600kg/m3, apparent density 2500kg/m3, porosity be 36.5% rubble coarse aggregate；Strength grade P.W42.5, apparently
Density is 3200kg/m3White cement；Apparent density is 2728kg/m3, main chemical compositions iron tailings as shown in the table grinds
Miberal powder；
1 miberal powder main chemical compositions of table
Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1450 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 74.42%, accounts for the 15.99% of raw material total quality percentage by 311.5 parts of white cement, and miberal powder is with white cement mass ratio
2:8, accounts for the 3.76% of raw material total quality percentage, 109.9 parts of water, accounts for raw material total quality percentage by 73.3 parts of miberal powder
5.64%, 3.66 parts of water-reducing agent, the 0.19% of raw material total quality percentage, water-cement ratio 0.29 are accounted for, water-reducing agent volume is
0.95%, design porosity is prepared according to 20.0%.
The preparation process of white cement pervious concrete can be such that
Feeding method uses secondary charging method in experiment, is stirred using mechanical forced.Concrete it is agitated uniformly after, be divided to two
It is secondary to be packed into mold, it is all uniformly plugged and pounded with the steel pipe of certain thickness after loading half every time, keeps concrete mix tightly packed,
It is finally compacted smooth out molding with steel trowel.Overlay film is retained after the completion of pouring, and starts sprinkling maintenance after 24 hours, is taken off after 2~3 days
Mould obtains white cement pervious concrete, send to standard curing room and conserves.Other than without using synergist, test block manufacturing process can
With reference to Chinese patent literature CN108546033A.
By testing repeated measurement, actually obtaining pervious concrete porosity is 22.7% or so, and coefficient of permeability reaches
0.888cm/s, compression strength is up to 18.22Mpa, phenomena such as not occurring grain, hollowing in practice.
Put into actual production, it is contemplated that time cost and field condition, for convenience, it is saturating that construction site prepares white cement
A feeding method can be used in water coagulation soil, and half aggregate is first poured into blender, is subsequently poured into cement, then pours into remaining half bone
The mixed liquor of water-reducing agent and water is added after mixing evenly in material, continues to stir to uniformly mixed.
Embodiment 2
Raw material used by the present embodiment is as follows:
Partial size is 2.35~4.75mm, bulk density 1600kg/m3, apparent density 2500kg/m3, porosity is
36.5% rubble coarse aggregate；Strength grade P.W42.5, apparent density 3200kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2728kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1568 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 75.88%, accounts for the 13.30% of raw material total quality percentage by 274.9 parts of white cement, and white cement is with powdered ore quality ratio
7:3, accounts for the 5.32% of raw material total quality percentage, 109.9 parts of water, accounts for raw material total quality percentage by 109.9 parts of miberal powder
5.32%, 3.66 parts of water-reducing agent, the 0.18% of raw material total quality percentage, water-cement ratio 0.29 are accounted for, water-reducing agent volume is
0.95%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 19.1% or so, and coefficient of permeability reaches
0.926cm/s, compression strength is up to 20.11Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 3
Raw material used by the present embodiment is as follows:
Partial size is 2.35~4.75mm, bulk density 1600kg/m3, apparent density 2500kg/m3, porosity is
36.5% rubble coarse aggregate；Strength grade P.W42.5, apparent density 3200kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2728kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1568 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 75.88%, accounts for the 11.53% of raw material total quality percentage by 238.3 parts of white cement, and white cement is with powdered ore quality ratio
6:4, accounts for the 7.09% of raw material total quality percentage, 109.9 parts of water, accounts for raw material total quality percentage by 146.5 parts of miberal powder
5.32%, 3.66 parts of water-reducing agent, the 0.18% of raw material total quality percentage, water-cement ratio 0.29 are accounted for, water-reducing agent volume is
0.95%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 19.4% or so, and coefficient of permeability reaches
0.761cm/s, compression strength is up to 18.60Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 4
Raw material used by the present embodiment is as follows:
Partial size is 2.35~4.75mm, bulk density 1800kg/m3, apparent density 2800kg/m3, porosity is
35.0% rubble coarse aggregate；Strength grade P.W42.5, apparent density 2900kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2500kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1750 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 78.53%, accounts for the 11.34% of raw material total quality percentage by 252.7 parts of white cement, and white cement is with powdered ore quality ratio
7:3, accounts for the 4.86% of raw material total quality percentage, 111.9 parts of water, accounts for raw material total quality percentage by 108.0 parts of miberal powder
5.02%, 5.42 parts of water-reducing agent, the 0.24% of raw material total quality percentage, water-cement ratio 0.31 are accounted for, water-reducing agent volume is
1.50%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 19.6% or so, and coefficient of permeability reaches
0.820cm/s, compression strength is up to 20.17Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 5
Raw material used by the present embodiment is as follows:
Partial size is 4.75~9.50mm (that is, partial size is greater than 4.75mm and is less than or equal to 9.5mm), and bulk density is
1511kg/m3, apparent density 2583kg/m3, porosity be 41.5% rubble coarse aggregate；Strength grade P.W42.5, apparently
Density is 3200kg/m3White cement；It is 2728kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, it is close
Degree is 1g/mL.
The preparation of white cement pervious concrete weighs 1481 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 71.79%, accounts for the 17.23% of raw material total quality percentage by 355.5 parts of white cement, and white cement is with powdered ore quality ratio
8:2, accounts for the 4.31% of raw material total quality percentage, 133.2 parts of water, accounts for raw material total quality percentage by 88.9 parts of miberal powder
6.46%, 4.44 parts of water-reducing agent, the 0.22% of raw material total quality percentage, water-cement ratio 0.30 are accounted for, water-reducing agent volume is
1.00%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 21.5% or so, and coefficient of permeability reaches
0.616cm/s, compression strength is up to 19.17Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 6
Raw material used by the present embodiment is as follows:
Partial size is 4.75~9.50mm, bulk density 1511kg/m3, apparent density 2583kg/m3, porosity is
41.5% rubble coarse aggregate；Strength grade P.W42.5, apparent density 3200kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2728kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1481 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 71.79%, accounts for the 15.08% of raw material total quality percentage, white cement and powdered ore quality ratio are 7 by 311 parts of white cement:
3,133.3 parts of miberal powder, the 6.46% of raw material total quality percentage is accounted for, 133.2 parts of water, accounts for raw material total quality percentage
6.46%, 4.44 parts of water-reducing agent, the 0.22% of raw material total quality percentage, water-cement ratio 0.30 are accounted for, water-reducing agent volume is
1.00%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 21.9% or so, and coefficient of permeability reaches
0.453cm/s, compression strength is up to 20.25Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 7
Raw material used by the present embodiment is as follows:
Partial size is 4.75~9.50mm, bulk density 1511kg/m3, apparent density 2583kg/m3, porosity is
41.5% rubble coarse aggregate；Strength grade P.W42.5, apparent density 3200kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2728kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1400 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 72.73%, accounts for the 12.47% of raw material total quality percentage, white cement and powdered ore quality ratio are 6 by 240 parts of white cement:
4,160.8 parts of miberal powder, the 8.35% of raw material total quality percentage is accounted for, 120.24 parts of water, accounts for raw material total quality percentage
6.25%, 4.01 parts of water-reducing agent, the 0.21% of raw material total quality percentage, water-cement ratio 0.30 are accounted for, water-reducing agent volume is
1.00%, design porosity is prepared according to 20.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 22.2% or so, and coefficient of permeability reaches
0.414cm/s, compression strength is up to 19.26Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 8
Raw material used by the present embodiment is as follows:
Partial size is 4.75~9.50mm, bulk density 1700kg/m3, apparent density 2830kg/m3, porosity is
38.5% rubble coarse aggregate；Strength grade P.W42.5, apparent density 2900kg/m3White cement；Iron tailings grinds miberal powder
Apparent density is 2500kg/m3；Polycarboxylic acids liquid water-reducing agent, density 1g/mL.
The preparation of white cement pervious concrete weighs 1620 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 75.30%, accounts for the 13.05% of raw material total quality percentage by 280.7 parts of white cement, and white cement is with powdered ore quality ratio
7:3, accounts for the 5.59% of raw material total quality percentage, 124.3 parts of water, accounts for raw material total quality percentage by 120.3 parts of miberal powder
5.78%, 6.02 parts of water-reducing agent, the 0.28% of raw material total quality percentage, water-cement ratio 0.30 are accounted for, water-reducing agent volume is
1.50%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 21.1% or so, and coefficient of permeability reaches
0.524cm/s, compression strength is up to 20.32Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 9
Raw material used by the present embodiment is as follows:
Rubble coarse aggregate is the gradation partial size bone being mixed to get by uniform qualities such as the coarse aggregate 1:1 of two kinds of different-grain diameters
Material, partial size is respectively 2.35~4.75mm, 4.75~9.5mm, and apparent density is respectively 2500kg/m3、2583kg/m3, accumulation
Density is respectively 1600kg/m3、1511kg/m3, accumulation porosity is respectively 36.5%, 41.5%, and gradation partial size aggregate is apparently close
Degree is 2465kg/m3, bulk density 1570kg/m3, accumulation porosity is 36.3%；Strength grade P.W42.5, apparent density
For 3200kg/m3White cement；It is 2728kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, density are
1g/mL。
The preparation of white cement pervious concrete weighs 1539 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 76.42%, accounts for the 14.40% of raw material total quality percentage by 290.1 parts of white cement, and white cement is with powdered ore quality ratio
8:2, accounts for the 3.60% of raw material total quality percentage, 108.78 parts of water, accounts for raw material total quality percentage by 72.5 parts of miberal powder
5.40%, 3.62 parts of water-reducing agent, the 0.18% of raw material total quality percentage, water-cement ratio 0.30 are accounted for, water-reducing agent volume is
1.00%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 16.4% or so, and coefficient of permeability reaches
0.637cm/s, compression strength is up to 19.22Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 10
Raw material used by the present embodiment is as follows:
Rubble coarse aggregate is the gradation partial size bone being mixed to get by uniform qualities such as the coarse aggregate 1:1 of two kinds of different-grain diameters
Material, partial size is respectively 2.35~4.75mm, 4.75~9.5mm, and apparent density is respectively 2500kg/m3、2583kg/m3, accumulation
Density is respectively 1600kg/m3、1511kg/m3, accumulation porosity is respectively 36.5%, 41.5%, and gradation partial size aggregate is apparently close
Degree is 2465kg/m3, bulk density 1570kg/m3, accumulation porosity is 36.3%；Strength grade P.W42.5, apparent density
For 3200kg/m3White cement；It is 2728kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, density are
1g/mL。
The preparation of white cement pervious concrete weighs 1539 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 76.42%, accounts for the 12.60% of raw material total quality percentage by 253.8 parts of white cement, and white cement is with powdered ore quality ratio
7:3, accounts for the 5.40% of raw material total quality percentage, 108.78 parts of water, accounts for raw material total quality percentage by 108.8 parts of miberal powder
5.40%, 3.62 parts of water-reducing agent, account for the 0.18% of raw material total quality percentage, water-cement ratio 0.30, water-reducing agent volume is
1.00%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 15.4% or so, and coefficient of permeability reaches
0.538cm/s, compression strength is up to 22.18Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 11
Raw material used by the present embodiment is as follows:
Rubble coarse aggregate is the gradation partial size bone being mixed to get by uniform qualities such as the coarse aggregate 1:1 of two kinds of different-grain diameters
Material, partial size is respectively 2.35~4.75mm, 4.75~9.5mm, and apparent density is respectively 2500kg/m3、2583kg/m3, accumulation
Density is respectively 1600kg/m3、1511kg/m3, accumulation porosity is respectively 36.5%, 41.5%, and gradation partial size aggregate is apparently close
Degree is 2465kg/m3, bulk density 1570kg/m3, accumulation porosity is 36.3%；Strength grade P.W42.5, apparent density
For 3200kg/m3White cement；It is 2728kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, density are
1g/mL。
The preparation of white cement pervious concrete weighs 1539 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 76.42%, accounts for the 10.80% of raw material total quality percentage by 217.6 parts of white cement, and white cement is with powdered ore quality ratio
6:4, accounts for the 7.20% of raw material total quality percentage, 108.78 parts of water, accounts for raw material total quality percentage by 145.0 parts of miberal powder
5.40%, 3.62 parts of water-reducing agent, account for the 0.18% of raw material total quality percentage, water-cement ratio 0.30, water-reducing agent volume is
1.00%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 15.2% or so, and coefficient of permeability reaches
0.668cm/s, compression strength is up to 19.77Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 12
Raw material used by the present embodiment is as follows:
Rubble coarse aggregate is the gradation partial size bone being mixed to get by uniform qualities such as the coarse aggregate 1:1 of two kinds of different-grain diameters
Material, partial size is respectively 2.35~4.75mm, 4.75~9.5mm, and apparent density is respectively 2800kg/m3、2830kg/m3, accumulation
Density is respectively 1800kg/m3、1750kg/m3, accumulation porosity is respectively 34.0%, 38.5%, and gradation partial size aggregate is apparently close
Degree is 2740kg/m3, bulk density 1790kg/m3, accumulation porosity is 34.1%；Strength grade P.W42.5, apparent density
For 2900kg/m3White cement；It is 2500kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, density are
1g/mL。
The preparation of white cement pervious concrete weighs 1711 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 78.63%, accounts for the 11.29% of raw material total quality percentage by 245.7 parts of white cement, and white cement is with powdered ore quality ratio
7:3, accounts for the 4.84% of raw material total quality percentage, 108.81 parts of water, accounts for raw material total quality percentage by 105.3 parts of miberal powder
5.00%, 5.27 parts of water-reducing agent, account for the 0.24% of raw material total quality percentage, water-cement ratio 0.31, water-reducing agent volume is
1.50%, design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 15.7% or so, and coefficient of permeability reaches
0.611cm/s, compression strength is up to 21.13Mpa, phenomena such as not occurring grain, hollowing in practice.
Comparative example
Raw material used by the present embodiment is as follows:
Rubble coarse aggregate is the gradation partial size bone being mixed to get by uniform qualities such as the coarse aggregate 1:1 of two kinds of different-grain diameters
Material, partial size is respectively 2.35~4.75mm, 4.75~9.5mm, and apparent density is respectively 2800kg/m3、2830kg/m3, accumulation
Density is respectively 1800kg/m3、1750kg/m3, accumulation porosity is respectively 34.0%, 38.5%, and gradation partial size aggregate is apparently close
Degree is 2740kg/m3, bulk density 1790kg/m3, accumulation porosity is 34.1%；Strength grade P.W42.5, apparent density
For 2900kg/m3White cement；It is 2500kg/m that iron tailings, which grinds miberal powder apparent density,3；Polycarboxylic acids liquid water-reducing agent, density are
1g/mL。
The preparation of white cement pervious concrete weighs 1539 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage
Several 76.42% 362.6 parts of white cement, accounts for the 18.00% of raw material total quality percentage, does not add miberal powder, water 108.78
Part, the 5.40% of raw material total quality percentage is accounted for, 3.62 parts of water-reducing agent, accounts for the 0.18% of raw material total quality percentage, water
Glue ratio is 0.30, and water-reducing agent volume is 1.00%, and design porosity is prepared according to 15.0%.
By testing repeated measurement, actually obtaining pervious concrete porosity is 12.60% or so, and coefficient of permeability is
0.552cm/s, compression strength 16.85Mpa, phenomena such as not occurring grain, hollowing in practice.As it can be seen that not using miberal powder
The performances such as obtained its porosity of pervious concrete product and compression strength have decline.
In addition, in addition to the iron tailings of concrete composition used in above-described embodiment grinds miberal powder, (concrete composition can be shown in Table
1) outside, the present invention can also use other types of miberal powder, as long as guaranteeing the active constituent SiO in miberal powder2And Al2O3Always contain
45% or more amount, miberal powder specific surface area is between 500m2/ kg~800m2Between/kg.
Other than preparation method specific in above-described embodiment, the present invention is handled by initial feed through mixing
White cement pervious concrete, these are mixed treatment process and are also possible to the existing processing method of concrete preparation field.
According to actual needs, existing other function can also be increased into the white cement pervious concrete that the present invention obtains
Property ingredient, such as colorant, synergist, the specific type of these corresponding function raw materials and making in concrete preparation process
It can refer to the prior art with opportunity to be configured.In the present invention, various raw material components (such as rubble coarse aggregate, cementitious material)
The mass percent of shared raw material entirety specifically refer to respective components rubble coarse aggregate, cementitious material, water and water-reducing agent this four
Shared mass percent in kind component summation；The optional other function ingredient used can be added additionally as needed.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (7)
1. a kind of modified white cement pervious concrete of miberal powder, which is characterized in that be to handle to obtain through mixing using raw material
's；The raw material includes accounting for the rubble coarse aggregate that raw material total quality percentage is 71.79~78.63wt%, accounts for raw material entirety
The cementitious material of 16.13~21.54wt%, accounts for the water of the whole 5.00~6.46wt% of raw material, the water of both water and cementitious material
Glue ratio is 0.29~0.31, accounts for the water-reducing agent of the whole 0.18~0.28wt% of raw material, and the mass ratio of water-reducing agent and cementitious material is
(0.0095~0.0150): 1；Wherein, the rubble coarse aggregate is specially that partial size is more than or equal to 2.35mm and is less than or equal to
The small particle aggregate of 4.75mm, perhaps for partial size be greater than 4.75mm and less than or equal to 9.50mm large-particle-size aggregate or be institute
State the gradation partial size aggregate that small particle aggregate and the large-particle-size aggregate are uniformly mixed to form by 1:1 mass ratio；The gelling material
Material is specially the mixture that white cement and miberal powder are mixed to get according to mass ratio 8:2~6:4；
In addition, its design porosity of the white cement pervious concrete of miberal powder modification is 15.0~20.0%.
2. the modified white cement pervious concrete of miberal powder as described in claim 1, which is characterized in that the rubble coarse aggregate is derived from
Natural mountain stone；Described its bulk density of small particle aggregate is 1600~1800kg/m3, apparent density is 2500~2800kg/m3,
Porosity is 35.0~36.5%；Its bulk density of the large-particle-size aggregate is 1511~1700kg/m3, apparent density 2583
~2830kg/m3, porosity is 38.5~41.5%；Its bulk density of the gradation partial size aggregate is 1570~1790kg/m3,
Apparent density is 2465~2740kg/m3, porosity is 34.1~36.3%.
3. the modified white cement pervious concrete of miberal powder as described in claim 1, which is characterized in that the white cement ingredient is with silicon
Based on sour calcium, strength grade P.W42.5,2900~3200kg/m of apparent density3。
4. the modified white cement pervious concrete of miberal powder as described in claim 1, which is characterized in that the miberal powder is iron ore mine choosing
Iron tailings after mine grinds miberal powder, and apparent density is 2500~2728kg/m3。
5. the modified white cement pervious concrete of miberal powder as claimed in claim 4, which is characterized in that its primary chemical of the miberal powder
Ingredient and mass percentage are as follows:
6. the modified white cement pervious concrete of miberal powder as described in claim 1-5 any one, which is characterized in that described
Water-reducing agent is polycarboxylic acids liquid water-reducing agent, preferably maleic anhydride, Acrylate polyethylene glycol monoester, acrylic sodium sulfonate, K2S2O8
In one or more mixture, the density of the polycarboxylic acids liquid water-reducing agent is preferably 1g/mL.
7. the modified white cement pervious concrete of miberal powder as claimed in any one of claims 1 to 6, which is characterized in that described mixed
Stir process is closed as the stirring of secondary charging method mechanical forced, preferably secondary charging method adds material, and stirs using mechanical forced
It mixes.
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| CN108546033A (en) * | 2018-04-25 | 2018-09-18 | 华中科技大学 | A kind of white cement pervious concrete and preparation method thereof |
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| CN103011735A (en) * | 2012-12-31 | 2013-04-03 | 常州大学 | Colorful regeneration permeable concrete for road and preparation method thereof |
| WO2015020612A1 (en) * | 2013-08-07 | 2015-02-12 | Nanyang Technological University | Waste incinerator ash as aerating agent for the manufacture of lightweight construction materials |
| CN105565723A (en) * | 2016-01-27 | 2016-05-11 | 昆明市宜鑫荣商品混凝土有限公司 | Pervious concrete formula and construction method |
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