CN108546033A - A kind of white cement pervious concrete and preparation method thereof - Google Patents

A kind of white cement pervious concrete and preparation method thereof Download PDF

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Publication number
CN108546033A
CN108546033A CN201810378500.7A CN201810378500A CN108546033A CN 108546033 A CN108546033 A CN 108546033A CN 201810378500 A CN201810378500 A CN 201810378500A CN 108546033 A CN108546033 A CN 108546033A
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China
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water
raw material
white cement
pervious concrete
concrete
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CN201810378500.7A
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Chinese (zh)
Inventor
刘嘉豪
冯晓楠
石立国
翁邦正
程智龙
王宏宇
文韬
李雅雯
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Huazhong University of Science and Technology
China Construction Second Engineering Bureau Co Ltd
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Huazhong University of Science and Technology
China Construction Second Engineering Bureau Co Ltd
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Priority to CN201810378500.7A priority Critical patent/CN108546033A/en
Publication of CN108546033A publication Critical patent/CN108546033A/en
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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
    • 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
    • C04B2111/00017—Aspects relating to the protection of the environment
    • 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
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/80—Optical properties, e.g. transparency or reflexibility
    • C04B2111/82—Coloured 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
    • C04B2201/20—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 field of road construction, a kind of white cement pervious concrete and preparation method thereof is specifically disclosed, wherein white cement pervious concrete handles to obtain using raw material through mixing；Raw material include account for raw material total quality percentage be 75.66~80.86% and rubble coarse aggregate that grain size is 2.35~4.75mm, account for the white cement of the whole 14.02~17.91wt% of raw material, account for the water of the whole 4.49~5.55wt% of raw material, the water-cement ratio of both water and white cement is 0.31~0.34, account for the synergist of the whole 0.48~0.62wt% of raw material, account for the water-reducing agent of the whole 0.15~0.27wt% of raw material, the mass ratio of water-reducing agent and cement is (0.0110~0.0150)：1；In addition, the design porosity of the white cement pervious concrete is 15.0~28.0%.The present invention is graded by the group to concrete key to be improved, and is obtained the white cement pervious concrete that actual porosity is 16.0~28.5% and had not only been ensured the integral strength of concrete compared with prior art, but also concrete can be made to have good water penetration.

Description

A kind of white cement pervious concrete and preparation method thereof
Technical field
The invention belongs to field of road construction, more particularly, to a kind of white cement pervious concrete and preparation method thereof, Including white cement pervious concrete is specific with when production method, the white cement pervious concrete can be used as a kind of paving Material.
Background technology
China's freshwater resources total amount is big, accounts for the 6% of global water resources, the ranking world the 6th, but per capita water resource is very deficient Weary, the only a quarter of world average level is poorest one of the country of world's per capita water resource.Spatially, water and soil provides Source combination is uneven, distributes uneven, the area on the south the Changjiang river, and 36.5% national territorial area occupies 81% freshwater resources； On time, annual precipitation is concentrated mainly on summer, and Precipitation in Winter general insufficient annual 10%, Annual variations are big, and Lian Fenglian is withered Outstanding problem.With the propulsion of urbanization process, along with also have a series of serious Environmental and resource issues：To environment into Capable unreasonable transformation makes the reduction of natural water water-holding capacity, urban waterlogging phenomenon take place frequently, and endangers people life property safety；It is dirty Dye object direct emission water body causes water pollution, destroys the ecological balance, reduces the utilizability of water resource；Water resource is excessively developed Lead to shortage of resources etc..
In modern city, to ensure that the smooth hard of road ground, natural terrain are gradually blocked water material by cement pitch etc. Expect the waterproof pavement constructed substitution, but ignore the importance of water-permeable and air permeable, underground and natural precipitation is completely cut off, rainwater Underground can not be penetrated into time, leads to excess surface water waterlogging, increases municipal drainage burden, and underground water cannot supply, and water shortage is tight Weight in turn results in urban surface temperature and humidity adjustment scarce capacity, generates " heat island phenomenon ".
To alleviate municipal water ecological problem, changes traditional idea, promote the sustainable development of man and nature, " sponge city " Concept it is seasonable and go out, meeting the low permeable pavement material for influencing exploitation design concept also rapidly develops, wherein pervious concrete It is widely studied and applies as good road surface permeable pavement material.
Pervious concrete, also known as celluar concrete, non-fine concrete originate from Britain, are mainly used in concrete construction Non-load bearing wall material is subsequently promoted the use of in the area such as America and Europe, Japan as municipal paving material.It is free of fine aggregate, It is by coarse aggregate, cement and water, a kind of additive package porous light concrete made of special process stirring.Because of thick bone Hole is larger between material, and cement mortar is wrapped up on surface, is bonded to one another to form hole by cementing material, constitutes uniform honeycomb, Therefore there is powerful pervious function, can surface gathered water be discharged into underground in time, urban pavement ponding problem is effectively relieved, reduced Urban drainage pipe network is born, and realizes the supply to groundwater resources, moreover it is possible to avoid pollution of the bituminous paving to environment, in addition also have There are light-weight, ventilative, sqouynd absorption lowering noise, purifying water body and regulated flow, traditional road can be met to hardness, intensity Demand, and expectation of the ecological pavement to water-permeable and air permeable performance can be reached, meet the low purpose for influencing exploitation.
The prior art is prepared using white cement in pervious concrete technique, the problem of because of composition proportion and production method, often Often there is the problems such as concrete pavement unit cost is high, grain, hollowing are fallen in surface, and existing secondary batching method makes in the process usually Concrete strength requirement is cannot be satisfied, practice of construction process cannot be satisfied demand, both cannot be satisfied construction needs, has not also met reality Border uses demand.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, it is permeable mixed that the purpose of the present invention is to provide a kind of white cements Solidifying soil and preparation method thereof, wherein by component to the concrete key specific type of such as raw material (and accordingly match) into Row improves, and the white cement pervious concrete that design porosity is 15.0~25.0% both ensures concrete compared with prior art Integral strength, and can make concrete have good water penetration；Also, consider that pervious concrete is spread in practical pavement process The problems such as dress unit cost is high, grain, hollowing are fallen in surface, the present invention also changes the preparation method of the white cement pervious concrete Into by controlling the addition opportunity etc. of the setting of preparation method overall flow technique, critical materials, it is high to realize economical and practical performance White cement pervious concrete preparation.The compression strength and coefficient of permeability of pervious concrete in the present invention can reach preferable Level meets in Practical Project to concrete to permeable and intensity double requirements, is conducive to the ecological, environmental protective for safeguarding city.
To achieve the above object, according to one aspect of the present invention, a kind of white cement pervious concrete, feature are provided It is, handles to obtain through mixing using raw material；The raw material include account for raw material total quality percentage be 75.66~ 80.86% and grain size be 2.35~4.75mm rubble coarse aggregate, account for raw material total quality percentage be 14.02~ 17.91% white cement accounts for the water that raw material total quality percentage is 4.49~5.55%, the glue matter of both water and white cement Amount accounts for the synergist that raw material total quality percentage is 0.48~0.62%, accounts for raw material total quality hundred than being 0.31~0.34 The mass ratio of the water-reducing agent that score is 0.15~0.27%, water-reducing agent and cement is (0.0110~0.0150)：1；The white cement The design porosity of pervious concrete is 15.0~28.0%.
As present invention further optimization, the rubble coarse aggregate is derived from natural mountain stone, and grain size is 2.35~4.75mm, Bulk density is 1600~1800kg/m3, apparent density is 2500~2800kg/m3, porosity is 34.0~36.5%.
As present invention further optimization, the white cement ingredient is based on calcium silicates, strength grade P.W42.5, 1400~1600kg/m of bulk density3, 3000~3200kg/m of apparent density3。
As present invention further optimization, the water-reducing agent is polycarboxylic acids liquid water-reducing agent, preferably maleic anhydride, third Olefin(e) acid polyethylene glycol monoesters, acrylic sodium sulfonate, K2S2O8In one or more mixture, the polycarboxylic acids liquid water-reducing agent Density is preferably 1g/mL.
As present invention further optimization, the synergist is redispersable latex powder, which is The copolymerized polymer of water-soluble redispersion powders, preferably ethylene, vinyl acetate and versatic acid ethylene, the redispersable latex powder Density be preferably 500kg/m3；
The granularity of the redispersable latex powder is more than 80 mesh, and nonvolatile matter accounts for 98% of its mass percent or more, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
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.
It is another aspect of this invention to provide that the present invention provides the method for preparing above-mentioned white cement pervious concrete, it is special Sign is that the preparation method is that the water stirring 30s for accounting for water raw material whole 50% in raw material is added to rubble coarse aggregate, is then added White cement and synergist continue to stir 140s, is subsequently added into water-reducing agent and the remaining water raw material in raw material whole 50% that accounts for Water stirs 60s, obtains mixed mortar；Then, which is filled into mold at twice to be molded, wherein loading every time It is that 50% mixed mortar is packed into mold, is then plugged and pounded, keep concrete mix tightly packed；Then it presses Real floating molding is completed to pour；Overlay film is retained after the completion of pouring, and is started watering maintenance afterwards for 24 hours, is demoulded after 2~3d, obtain plain boiled water Mud pervious concrete, and give to standard curing room and conserve.
Contemplated above technical scheme through the invention, compared with prior art, by the reasonable of concrete material It matches, using the overall co-ordination between each raw material matched in specific proportions, is by the glue mass ratio control in raw material (0.31~0.34)：1, the mass ratio control of water-reducing agent and cement is (0.0110~0.0150)：1, it can obtain excellent white Cement pervious concrete, design porosity meet 15.0~28.0%, and actual porosity is 16.0~28.5%, and with good Good compression strength and coefficient of permeability, can meet the actual needs in engineering use, can be used as Municipal pavement conscientiously It applies on road concrete permeable road surface.The white cement pervious concrete composition proportion that this patent proposes, it is enterprising on prior art basis Row improves, and suitably adjusts mixing time, cement consumption can be reduced by being finally reached, and meet practice of construction economic needs, and can reach The purpose required to concrete strength.The calculating of its design porosity of pervious concrete meets CJJ/T135-2009 in the present invention 《Water-permeable cement concrete pavement technique regulation》In it is related record, using these corresponding specification, formula etc. in the prior art, By the aggregate of addition, cement, water, the ratio of additive, density etc., design porosity can be calculated；Also, it is strong due to consolidating Degree, measurement error etc., design porosity and actual porosity simultaneously differ, it is of the invention in effective porosity can pass through Seepage Experiment It is calculated.
The present invention using secondary charging method and improves it, and material release sequence is adjusted, and changes mixing time, is protecting Achieve the purpose that save cement consumption under the premise of card concrete strength, promote water penetration.It is permeable since material is free of fine aggregate Concrete strength relies primarily on the cementation of contact point and contact surface between coarse aggregate, and cementation comes from cement etc. Therefore cementitious material will allow cementitious material fully to wrap up coarse aggregate in stirring, it is former to account for water in raw material with coarse aggregate mixing first The water of material whole 50% stirs 30s, and wetting coarse aggregate surface facilitates the cementitious materials such as follow-up cement to better cover the thick bone of package Material.The materials such as cement, synergist are put into again, stir 140s, and more conventional secondary charging method mixing time is longer, ensures material stirring Evenly, reinforced cementitious power.
Pervious concrete provided by the invention has obtained the permeable coagulation of white cement of function admirable by reasonably matching Soil, reference《Water-permeable cement concrete pavement technique regulation》(CJJ/T 135-2009) and《Water-permeable brick》Survey in (JCT 945) The test cube of method for testing, a length of 150mm of difference opposite side tests compression strength, to the cylinder of diameter 100mm height 50mm Permeability rate is tested in test block, the results showed that 28 days compression strength can reach 20MPa or more, and coefficient of permeability is comprehensive in 0.3cm/s or more It is best to close performance, meets national requirements, and meet needs of the pervious concrete in engineering use, may advantageously facilitate sustainable development Exhibition.
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 ensureing concrete strength Under, the dosage in dyeing course to dyeing pigment is effectively reduced, overall cost is controlled, there is practical popularization significance.
Description of the drawings
Fig. 1 is the fabrication processing schematic diagram of pervious concrete of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below that Conflict is not constituted between this to can be combined with each other.
Embodiment 1
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity is more than 80 mesh, more thinner better, nonvolatile matter accounting 98% or more, pH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1500 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 75.66%, 355 parts of white cement account for the 17.91% of raw material total quality percentage, and 110.1 parts of water accounts for raw material entirety matter The 5.55% of percentage is measured, 5.33 parts of water-reducing agent accounts for the 0.27% of raw material total quality percentage, and 12.25 parts of synergist accounts for original Expect that the 0.62% of total quality percentage, water-cement ratio 0.31, water-reducing agent volume are 1.50%, design porosity is according to 15.0% It is prepared.
The preparation process of white cement pervious concrete can be as follows：
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 is started watering maintenance after 24 hours, is taken off after 2~3 days Mould obtains white cement pervious concrete, send to standard curing room and conserves.Test block manufacturing process figure is as shown in Figure 1.
By testing repeated measurement, it is 17.8% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 0.871cm/s, compression strength is up to 21.8Mpa, 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 and synergist, then pours into surplus After stirring evenly, the mixed liquor of water-reducing agent and water is added in lower half aggregate, continues to stir to uniformly mixed.
Embodiment 2
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1520 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 76.55%, 340 parts of white cement account for the 17.12% of raw material total quality percentage, and 108.8 parts of water accounts for raw material entirety matter The 5.48% of percentage is measured, 5.1 parts of water-reducing agent accounts for the 0.26% of raw material total quality percentage, and 11.73 parts of synergist accounts for original Expect total quality percentage 0.59%, water-cement ratio 0.32, water-reducing agent volume be 1.50%, design porosity be 15.0% into It is prepared by row.
By testing repeated measurement, it is 17.1% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 0.668cm/s, compression strength is up to 22.4Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 3
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1540 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 77.21%, 330 parts of white cement account for the 16.54% of raw material total quality percentage, and 108.9 parts of water accounts for raw material entirety matter The 5.46% of percentage is measured, 4.29 parts of water-reducing agent accounts for the 0.22% of raw material total quality percentage, and 11.39 parts of synergist accounts for original Expect total quality percentage 0.57%, water-cement ratio 0.33, water-reducing agent volume be 1.30%, design porosity be 15.0% into It is prepared by row.
By testing repeated measurement, it is 16.0% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 0.525cm/s, compression strength is up to 23.0Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 4
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1560 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 80.06%, 280 parts of white cement account for the 14.37% of raw material total quality percentage, and 95.2 parts of water accounts for raw material total quality The 4.89% of percentage, 3.64 parts of water-reducing agent account for the 0.19% of raw material total quality percentage, and 9.66 parts of synergist accounts for raw material The 0.50% of total quality percentage, water-cement ratio 0.34, water-reducing agent volume are 1.30%, and design porosity is 20.0% progress It prepares.
By testing repeated measurement, it is 22.5% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 0.999cm/s, compression strength is up to 21.1Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 5
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1500 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 80.86%, 260 parts of white cement account for the 14.02% of raw material total quality percentage, and 83.2 parts of water accounts for raw material total quality The 4.49% of percentage, 2.86 parts of water-reducing agent account for the 0.15% of raw material total quality percentage, and 8.97 parts of synergist accounts for raw material The 0.48% of total quality percentage, water-cement ratio 0.32, water-reducing agent volume are 1.10%, and design porosity is 25.0% progress It prepares.
By testing repeated measurement, it is 26.8% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 1.337cm/s, compression strength is up to 20.9Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 6
Raw material used by the present embodiment is as follows：
Grain 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, bulk density 1600kg/m3, apparent density 3200kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1460 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 80.39%, 260 parts of white cement account for the 14.32% of raw material total quality percentage, and 83.2 parts of water accounts for raw material total quality The 4.58% of percentage, 3.90 parts of water-reducing agent account for the 0.21% of raw material total quality percentage, and 8.97 parts of synergist accounts for raw material The 0.49% of total quality percentage, water-cement ratio 0.32, water-reducing agent volume are 1.50%, and design porosity is 28.0% progress It prepares.
By testing repeated measurement, it is 28.5% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 1.513cm/s, compression strength is up to 20.2Mpa, phenomena such as not occurring grain, hollowing in practice.
Embodiment 7
Raw material used by the present embodiment is as follows：
Grain size is 2.35~4.75mm, bulk density 1800kg/m3, apparent density 2800kg/m3, porosity is 34.0% rubble coarse aggregate；Strength grade P.W42.5, bulk density 1400kg/m3, apparent density 3000kg/m3It is white Cement；Polycarboxylic acids liquid water-reducing agent, density 1g/mL；Redispersable latex powder, water-soluble redispersion powders, ingredient be ethylene, The polymer of vinyl acetate, versatic acid ethylene, density 500kg/m3.Granularity be more than 80 mesh, 98% or more nonvolatile matter accounting, PH value is 5~8, and minimum film formation temperature is 0 DEG C.
The preparation of white cement pervious concrete weighs 1650 parts of rubble coarse aggregate by mass parts, accounts for raw material total quality percentage Several 77.99%, 360 parts of white cement account for the 16.80% of raw material total quality percentage, and 115.2 parts of water accounts for raw material entirety matter The 5.38% of percentage is measured, 5.4 parts of water-reducing agent accounts for the 0.25% of raw material total quality percentage, and 12.5 parts of synergist accounts for raw material The 0.58% of total quality percentage, water-cement ratio 0.32, water-reducing agent volume are 1.5%, and design porosity is 15.0% progress It prepares.
By testing repeated measurement, it is 16.8% or so to actually obtain pervious concrete porosity, and coefficient of permeability reaches 0.503cm/s, compression strength is up to 23.2Mpa, phenomena such as not occurring grain, hollowing in practice.
In the present invention white cement be preferably calcium silicates mixture.In addition to specific preparation method in above-described embodiment Outside, the white cement pervious concrete that the present invention is handled by initial feed through mixing, treatment process is mixed in these It can also be the existing processing method of concrete preparation field.
According to actual needs, increase other existing functions in the white cement pervious concrete that can also be obtained to the present invention Property ingredient, such as colorant the specific type of these corresponding function raw materials and uses opportunity in concrete preparation process The prior art is can refer to be configured.
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, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include Within protection scope of the present invention.

Claims (7)

1. a kind of white cement pervious concrete, which is characterized in that handle to obtain through mixing using raw material；The raw material Including account for raw material total quality percentage be 75.66~80.86% and rubble coarse aggregate that grain size is 2.35~4.75mm, Account for raw material total quality percentage be 14.02~17.91% white cement, account for raw material total quality percentage be 4.49~ The glue mass ratio of both 5.55% water, water and white cement is 0.31~0.34, and it is 0.48 to account for raw material total quality percentage ~0.62% synergist accounts for the water-reducing agent that raw material total quality percentage is 0.15~0.27%, the matter of water-reducing agent and cement Amount is than being (0.0110~0.0150)：1；The design porosity of the white cement pervious concrete is 15.0~28.0%.
2. white cement pervious concrete as described in claim 1, which is characterized in that the rubble coarse aggregate is derived from natural mountain stone, Grain size is 2.35~4.75mm, and bulk density is 1600~1800kg/m3, apparent density is 2500~2800kg/m3, porosity It is 34.0~36.5%.
3. white cement pervious concrete as described in claim 1, which is characterized in that the white cement ingredient based on calcium silicates, Strength grade is P.W42.5,1400~1600kg/m of bulk density3, 3000~3200kg/m of apparent density3。
4. white cement pervious concrete as described in claim 1, which is characterized in that the water-reducing agent is polycarboxylic acids liquid diminishing Agent, preferably maleic anhydride, Acrylate polyethylene glycol monoester, acrylic sodium sulfonate, K2S2O8In one or more mixture, The density of the polycarboxylic acids liquid water-reducing agent is preferably 1g/mL.
5. white cement pervious concrete as described in claim 1, which is characterized in that the synergist is redispersable latex powder, The redispersable latex powder is water-soluble redispersion powders, the preferably co-polymeric of ethylene, vinyl acetate and versatic acid ethylene The density of object, the redispersable latex powder is preferably 500kg/m3；
The granularity of the redispersable latex powder is more than 80 mesh, and nonvolatile matter accounts for 98% of its mass percent or more, pH value It is 5~8, minimum film formation temperature is 0 DEG C.
6. white cement pervious concrete as described in claim 1, which is characterized in that the mixing processing is secondary charging method Mechanical forced stirs, and preferably secondary charging method adds material, and is stirred using mechanical forced.
7. the method for preparing white cement pervious concrete as claimed in any one of claims 1 to 6, which is characterized in that the preparation Method is that the water stirring 30s for accounting for water raw material whole 50% in raw material is added to rubble coarse aggregate, and white cement and synergy is then added Agent continues to stir 140s, is subsequently added into water-reducing agent and the remaining water stirring 60s for accounting for water raw material whole 50% in raw material, obtains To mixed mortar；Then, which is filled into mold at twice to be molded, wherein it is by 50% to load every time The mixed mortar is packed into mold, is then plugged and pounded, and keeps concrete mix tightly packed；Then compacting is smoothed out and has been molded At pouring；Overlay film is retained after the completion of pouring, and is started watering maintenance afterwards for 24 hours, is demoulded after 2~3d, obtain white cement pervious concrete, And it send to standard curing room and conserves.
CN201810378500.7A 2018-04-25 2018-04-25 A kind of white cement pervious concrete and preparation method thereof Pending CN108546033A (en)

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