A kind of pervious concrete additive and preparation method thereof
Technical field
The invention belongs to building material technical field is and in particular to a kind of pervious concrete additive and preparation method thereof.
Background technology
With the constantly improve of urban construction, for the requirement also more and more higher of construction material.Pervious concrete is due to it
Unique structure so as to have good gas permeability and water penetration, for alleviating urban heat land effect, recharge of groundwater and solution
Certainly good effect is played because of the waterlogging that heavy rain causes in city, can be applicable to city square, cell road and some park roads
Road.
Country vigorously advocates city sponge engineering construction at present, but due to lacking pervious concrete professional technique and construction skill
Art, it is high to cause some pervious concrete costs, the problems such as complicated construction technique and later stage function are inconspicuous.At present with regard to saturating
The patent of water coagulation soil and pervious concrete additive is more, but all employ polymer fiber or polymer adhesive.Specially
Sharp CN 103708792A discloses a kind of preparation method of permeable concrete, has used a kind of PVA fiber;Patent CN
103360000A discloses a kind of pervious concrete and preparation method thereof, employs Organic adhesive;Due to polymer fiber and
The price of polymer adhesive is high, causes the high cost of pervious concrete.Additionally, due to pervious concrete and conventional concrete
Compare and there is certain structural particularity, particularly the maintenance stage, overlay film to be carried out, treats pervious concrete typically after paving
After solidification 24h, film is opened and carries out maintenance of sprinkling water, due to the open-celled structure of pervious concrete, water loss is very fast, so
Again film must be covered again after watering, overlay film maintenance of will being sprinkled water twice for general a day, also will when sky heat
Increase the number of times of watering overlay film maintenance, curing cycle is usually 5-7 days.The maintenance processes of therefore pervious concrete be one extremely
Loaded down with trivial details process.These factors together constitute the factor hindering pervious concrete popularization and application.
Content of the invention
The present invention is directed to the deficiencies in the prior art, there is provided a kind of volume pervious concrete additive little, easy to use.
Present invention also offers the preparation method of this pervious concrete additive.
The purpose of the present invention is achieved by the following technical solution:
A kind of pervious concrete additive, is made up of the raw material of following weight portion:Micro mist material 0.5-95 part, reinforcing agent
0.2-3 part, defoamer 0.5-1.5 part, sticking enhancing water-loss reducer 2-10 part;
Described micro mist material is one of SILICA FUME, ground blast furnace slag and flyash;
Described reinforcing agent is triisopropanolamine or diethanol monoisopropanolamine;
Described defoamer is organic silicon defoamer;
Described sticking enhancing water-loss reducer is prepared by following steps:
1) polyethylene glycol of the methacrylic acid of 30-50 weight portion and 10-18 weight portion is put in reaction vessel, add
The chloroform of 80-100 weight portion and the hydroquinones of 0.4-0.8 weight portion, enclose 110 DEG C of condensing refluxes in nitrogen protective atmosphere
3.5h, obtains first product;
2) first product is removed chloroform in 40 DEG C of vacuum distillations, obtain esterification polymeric monomer;
3) by the allyl polyethenoxy ether of 80-90 weight portion, the distilled water of 90 weight portions, 0.4-0.8 weight portion mistake
The methylpropene sodium sulfonate of ammonium sulfate and 0.2-0.5 weight portion is placed in reaction vessel, by step 2) the esterification polymeric monomer that obtains
All added in reaction vessel in reaction just 1h by constant pressure funnel, 70 DEG C of reaction 3h, reaction uses hydroxide after terminating
Sodium solution adjusts pH to 7-8, obtains cement sticking enhancing water-loss reducer.
Described SILICA FUME is SiO2Content is more than 90% SILICA FUME.
Described ground blast furnace slag is S95 level ground blast furnace slag.
Described flyash is one-level flyash.
The molecular weight of described allyl polyethenoxy ether is 2400.
The molecular weight of described polyethylene glycol is 400.
A kind of preparation method of pervious concrete additive, is prepared by following steps:
1) micro mist material is added in double rod formula batch mixers, stir 3min, obtain powder;
2) reinforcing agent, defoamer and sticking enhancing water-loss reducer are mixed, obtain liquid material;
3) powder is added to double-roll type mixer, liquid material is uniformly sprayed in the double-roll type mixer in operating, continue
Stirring 3min, obtains pervious concrete additive.
The addition of described pervious concrete additive is the 0.8-1.5% of cement consumption.
Beneficial effects of the present invention:
1. present invention uses substantial amounts of trade waste, extensively, price is low in source, and the pervious concrete of preparation is ensureing thoroughly
While water coefficient and compression strength, effectively reduce water-permeable brick cost, the process for industrial residue simultaneously provides a new way
Footpath, has significant economic and social benefit.
2. the reinforcing agent of the present invention can increase the aggregate-cement ratio in pervious concrete, reduces cement consumption, reduces permeable mixed
The production cost of solidifying soil, significantly improves the compression strength of pervious concrete.Sticking enhancing water-loss reducer used by the present invention can improve cement
In the cladding power on base-material surface, reduce the evaporation of surface moisture, reduce the insertion hole number that cement surface causes because of moisture evaporation,
Exempt later stage wet curing, and can guarantee that coefficient of permeability and the compression strength of pervious concrete.
3. the pervious concrete additive volume of the present invention is little, and with low cost, superior performance is easy to use, is ensureing thoroughly
While water effect and compression strength, the hydroxyl in sticking enhancing water-loss reducer in additive can form hydrogen bond structure with hydrone,
It is prevented from the loss of moisture in concrete, the maintenance stage only need to pave aluminum coated steel, exempt the step of later stage wet curing
Suddenly, effectively accelerate the construction speed of pervious concrete, simplify the construction technology of pervious concrete.
4. the preparation method process is simple of the present invention, easily operates, practical.
Specific embodiment
Hereinafter the case that is preferable to carry out of the present invention is illustrated it will be appreciated that described herein be preferable to carry out case
It is merely to illustrate and explains the present invention, be not intended to limit the present invention.
Unless otherwise stated, the raw material used by the present invention is market and buys gained.
Embodiment 1
A kind of pervious concrete additive, is made up of the raw material of following weight portion:95 parts of micro mist material, reinforcing agent 0.2
Part, 0.5 part of defoamer, 2 parts of sticking enhancing water-loss reducer;
Described micro mist material is SiO2Content is more than 90% SILICA FUME;
Described reinforcing agent is triisopropanolamine;
Described defoamer is organic silicon defoamer;
Described sticking enhancing water-loss reducer is prepared by following steps:
1) polyethylene glycol of the methacrylic acid of 30g and 18g is put in reaction vessel, add 80g chloroform and
The hydroquinones of 0.8g, encloses 110 DEG C of condensing reflux 3.5h in nitrogen protective atmosphere, obtains first product;
2) first product is removed chloroform in 40 DEG C of vacuum distillations, obtain esterification polymeric monomer;
3) by the metering system of the allyl polyethenoxy ether of 80g, the distilled water of 90g, the ammonium persulfate of 0.8g and 0.5g
Sodium sulfonate is placed in reaction vessel, by step 2) the esterification polymeric monomer that obtains passes through constant pressure funnel in reaction just 1h all
Add in reaction vessel, 70 DEG C of reaction 3h, reaction adjusts pH to 7 with sodium hydroxide solution after terminating, and obtains cement sticking enhancing water-loss reducer.
A kind of preparation method of pervious concrete additive, is prepared by following steps:
1) micro mist material is added in double rod formula batch mixers, stir 3min, obtain powder;
2) reinforcing agent, defoamer and sticking enhancing water-loss reducer are mixed, obtain liquid material;
3) powder is added to double-roll type mixer, liquid material is uniformly sprayed in the double-roll type mixer in operating, continue
Stirring 3min, obtains pervious concrete additive.
Embodiment 2
A kind of pervious concrete additive, is made up of the raw material of following weight portion:50 parts of micro mist material, reinforcing agent 1.5
Part, 1 part of defoamer, 6 parts of sticking enhancing water-loss reducer;
Described micro mist material is S95 level ground blast furnace slag;
Described reinforcing agent is diethanol monoisopropanolamine;
Described sticking enhancing water-loss reducer is prepared by following steps:
1) polyethylene glycol of the methacrylic acid of 40 weight portions and 14 weight portions is put in reaction vessel, add 90 weight
The chloroform of part and the hydroquinones of 0.6 weight portion, enclose 110 DEG C of condensing reflux 3.5h in nitrogen protective atmosphere, obtain first product;
2) first product is removed chloroform in 40 DEG C of vacuum distillations, obtain esterification polymeric monomer;
3) by the allyl polyethenoxy ether of 85 weight portions, the distilled water of 90 weight portions, the ammonium persulfate of 0.6 weight portion and
The methylpropene sodium sulfonate of 0.3 weight portion is placed in reaction vessel, by step 2) the esterification polymeric monomer that obtains passes through constant pressure addition
Funnel all adds in reaction vessel in reaction just 1h, 70 DEG C of reaction 3h, and reaction adjusts pH with sodium hydroxide solution after terminating
To 8, obtain cement sticking enhancing water-loss reducer.
Remaining is with embodiment 1.
Embodiment 3
A kind of pervious concrete additive, is made up of the raw material of following weight portion:0.5 part of micro mist material, reinforcing agent 3
Part, 1.5 parts of defoamer, 10 parts of sticking enhancing water-loss reducer;
Described micro mist material is one-level flyash;
Described reinforcing agent is triisopropanolamine;
Described sticking enhancing water-loss reducer is prepared by following steps:
1) polyethylene glycol of the methacrylic acid of 50 weight portions and 10 weight portions is put in reaction vessel, add 100 weights
The amount chloroform of part and the hydroquinones of 0.4 weight portion, enclose 110 DEG C of condensing reflux 3.5h in nitrogen protective atmosphere, obtain first product;
2) first product is removed chloroform in 40 DEG C of vacuum distillations, obtain esterification polymeric monomer;
3) by the allyl polyethenoxy ether of 90 weight portions, the distilled water of 90 weight portions, the ammonium persulfate of 0.4 weight portion and
The methylpropene sodium sulfonate of 0.2 weight portion is placed in reaction vessel, by step 2) the esterification polymeric monomer that obtains passes through constant pressure addition
Funnel all adds in reaction vessel in reaction just 1h, 70 DEG C of reaction 3h, and reaction adjusts pH with sodium hydroxide solution after terminating
To 7, obtain cement sticking enhancing water-loss reducer.
Remaining is with embodiment 1.
Performance test:According to 12 parts of 5-10mm stone, 3.45 parts of 42.5 Portland cement, 0.996 part of water proportioning
Prepare pervious concrete, wherein, the pervious concrete of experimental group 1-3 preparation is respectively using the permeable coagulation of embodiment 1-3 preparation
Soil additive, addition is the 1.2% of cement quality.According to CJJ/T135-2009《Water-permeable cement concrete pavement technique is advised
Journey》Standard is tested, and result is as shown in table 1.
Table 1 the performance test results