CN104177029B - Inorganic materials/polymkeric substance compound high tenacity concrete and preparation method thereof - Google Patents
Inorganic materials/polymkeric substance compound high tenacity concrete and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of inorganic materials/polymkeric substance compound high tenacity concrete and preparation method thereof, by chemical reaction, modification is carried out to carbon nanotube, the modified carbon nano-tube of obtained chemical grafting treated Hydroxypropylcelliloxe, joined after in polyacrylate dispersion, again with water, the toughness reinforcing emulsion of polyacrylic ester, cement, rubble, fine aggregate, slag powders, flyash together with water reducer as raw material, through stirring, mixing, obtained described inorganic materials/polymkeric substance compound high tenacity concrete.After testing, high tenacity concrete provided by the present invention can show significant strain hardening or strain hardening feature under uniaxial direct tensile load or bending load effect, its bending strength can reach 19-29MPa, tensile strength can reach 8-16MPa, ultimate compression strength can reach 78-95MPa, the bridge floor of the over strait and river-spanning bridge of large span, high ferro viaduct can be applied to, and the fields such as all types of tunnel arch wall such as subway.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of inorganic materials/polymkeric substance compound high tenacity concrete and preparation method thereof.
Background technology
The shortcoming that conventional concrete bending strength is lower, fragility is high causes it in use easily to produce crack even rupturing, thus have a strong impact on general safety and the work-ing life of building.Especially for the bridge floor of such as Longspan Bridge and high ferro viaduct, and building structure and the position such as all types of tunnel arch wall, because its ambient stress is complicated harsh, the high tenacity concrete material that bending strength is high as far as possible must be adopted.For improving concrete toughness, reinforcing bar is comparatively early adopted and is used so far in a large number.Afterwards, mechanical property and the better each fiber material of toughening effect, as carbon fiber, glass fibre, good fortune tap fiber, steel wire/steel screen fabric, polyvinyl alcohol fiber, trevira, durafiber etc. are successively used, and develop corresponding concrete product.
Since being found from 1991, the accurate one-dimensional hollow tubular construction that carbon nanotube is peculiar makes it in mechanics, electricity, magnetics etc. are numerous, demonstrate excellent properties, therefore develops the important front edge becoming 21 century material sciemtifec and technical sphere rapidly.In carbon nanotube, carbon atom is with sp
2be hybridized to master, hexagonal grid structure Existential Space topological framework, can form certain sp simultaneously
3hybrid bond.This sp of carbon nanotube
2and sp
3the chemical bond of mixed hybridization makes it have excellent mechanical property, and the tensile strength as carbon nanotube can reach 50 ~ 200GPa, and be 100 times of same volume steel, density but only has 1/6 of steel; The Young's modulus of carbon nanotube can reach 1TPa, suitable with diamond, is about 5 times of steel.The hardness of carbon nanotube is suitable with diamond, but has excellent snappiness.Under carbon nanotube was once placed in the hydraulic pressure of 1011MPa by researchist, huge pressure made carbon nanotube be crushed, but after removing pressure, carbon nanotube restores to the original state immediately, showed fabulous toughness.Carbon nanotube is the material with most high specific strength can prepared at present, is thus claimed " super fiber ".Simultaneously, for conventional industrial activeness and quietness fiber, determine that one of key factor of intensity is length-to-diameter ratio, the length-to-diameter ratio of material engineering Shi Xiwang is at least 20:1, and the length-to-diameter ratio of carbon nanotube is generally at more than 1000:1, it is therefore a kind of ideal concrete toughen and intensify material.
For preparing high tenacity concrete, the present invention have employed one " inorganic materials/polymer interpenetration network coordination plasticizing system " first.Be somebody's turn to do in " coordination plasticizing system ", inorganic materials adopts " super fiber " carbon nanotube of excellent in mechanical performance.Because the specific surface area of carbon nanotube is large, specific surface energy is high, easily tangling reunites forms block aggregate thus loses its excellent properties had, the application of serious restriction carbon nanotube in concrete is toughness reinforcing.The present invention carries out modification by series of chemical to carbon nanotube, prepare the modified carbon nano-tube of chemical grafting treated Hydroxypropylcelliloxe, the introducing of Hydroxypropylcelliloxe significantly can strengthen the repulsive interaction between carbon nano-tube material, and it is water-soluble that carbon nanotube is had.
Meanwhile, also adopt the polyacrylate dispersion that two kinds different: containing the monomer such as methyl methacrylate, hydroxyethyl methylacrylate in a kind of emulsion components in this " coordination plasticizing system ", after its solidification, intensity of material is higher; Containing the monomer such as ethyl propenoate, butyl acrylate in another kind of emulsion components, after its solidification, the snappiness of material is better.These two kinds of polyacrylate dispersions, in the process of concrete crosslinking curing, can form microcosmic inierpeneirating network structure, thus make concrete material show good toughness, intensity, fatigue resistance and isotropy, bring great improvement to concrete performance.
Summary of the invention
The object of the present invention is to provide a kind of inorganic materials/polymkeric substance compound high tenacity concrete and preparation method thereof, by chemical reaction, modification is carried out to carbon nanotube, the modified carbon nano-tube of obtained chemical grafting treated Hydroxypropylcelliloxe, is joined in polyacrylate dispersion; And utilize the polyacrylate dispersion of two kinds of different monomers compositions can form microcosmic inierpeneirating network structure in the process of concrete crosslinking curing, build one " inorganic materials/polymer interpenetration network coordination plasticizing system ", thus prepare a kind of toughness, intensity, fatigue resistance concrete material all preferably.
For achieving the above object, the present invention adopts following technical scheme:
A kind of inorganic materials/polymkeric substance compound high tenacity concrete, is made up of water, polyacrylate dispersion, the toughness reinforcing emulsion of polyacrylic ester, cement, rubble, fine aggregate, slag powders, flyash and water reducer containing modified carbon nano-tube; The proportioning of each component is as follows:
Water 130-160kg/m
3;
Containing the polyacrylate dispersion 10-15kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 20-30kg/m of polyacrylic ester
3;
Cement 385-410kg/m
3;
Rubble 950-1050kg/m
3;
Fine aggregate 550-750kg/m
3;
Slag powders 20-30kg/m
3;
Flyash 40-65kg/m
3;
Water reducer 3.5-6kg/m
3;
Described containing in the polyacrylate dispersion of modified carbon nano-tube, the mass percent of modified carbon nano-tube is 1-3.5%.
The preparation method of described modified carbon nano-tube comprises the steps:
1) carbon nanotube 1830g is joined in the nitration mixture of the 9L vitriol oil and 6L concentrated nitric acid composition, ultrasonic 24h post-heating backflow 48h, after centrifugation, carbon nanotube is washed, vacuum-drying 24h at 60-65 DEG C, obtain the carbon nanotube 1800g of surface containing carboxyl functional group;
2) by the carbon nanotube 1800g of above-mentioned surface containing carboxyl functional group, join in 15L thionyl chloride, after stirring 3h at 25-30 DEG C, be warmed up to 80 DEG C of return stirring 24h, then thionyl chloride is removed under reduced pressure, carbon nanotube after anhydrous propanone is cleaned is vacuum-drying 24h at room temperature, obtains the carbon nanotube 1765g of surface containing acid chloride groups;
3) by the carbon nanotube 1765g of above-mentioned surface containing acid chloride groups, join in the 8.5LN-methyl-2-pyrrolidone containing 490g quadrol and 100ml triethylamine, 5h is stirred at 25-30 DEG C, after stirring 24h again at 80 DEG C, remove N-Methyl pyrrolidone and triethylamine under reduced pressure, after washing with water, at room temperature vacuum-drying 36h, obtains the carbon nanotube 1730g of surface with amino;
4) by the carbon nano tube derivative 1730g of above-mentioned surface with amino, join in the 6.5L tetrahydrofuran (THF) containing 280g trimeric cyanamide at 0-3 DEG C, and continue to stir 48h at 0-3 DEG C after, remove tetrahydrofuran (THF) under reduced pressure, after anhydrous propanone is cleaned, vacuum-drying 16h at 5-10 DEG C, obtains the carbon nanotube 1710g of surface with chloride triazine ring;
5) by the carbon nanotube 1710g of chloride for above-mentioned surface triazine ring, at the anhydrous N of 5.5L, in N '-dimethyl methane amide after stirring and dissolving, at 30-35 DEG C, be slowly added drop-wise to 1.6L in 12h is dissolved with in the anhydrous propanone solution of 650g Hydroxypropylcelliloxe, after dropwising after 48-50 DEG C of isothermal reaction 36h, be warming up to 90-92 DEG C again and isothermal reaction 48h, wash with water after removing solvent under reduced pressure, vacuum-drying 48h at 40-45 DEG C, obtains the water-soluble modified carbon nanotube 1950g of chemical grafting treated Hydroxypropylcelliloxe;
In this modified carbon nano-tube, the mass percent of hydroxypropylcellulose is 16%.
The described polyacrylate dispersion containing modified carbon nano-tube, its preparation method comprises the steps (in step, number used is all with parts by weight):
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 20-25 DEG C, using methyl methacrylate 20-30 part, Hydroxyethyl acrylate 15-25 part, hydroxyethyl methylacrylate 10-20 part, methoxyethyl acrylate 10-20 part, the mixing of vinylformic acid 5-10 part as monomer, join in 130-160 part water together with 0.2-0.5 part lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by the Potassium Persulphate of monomer weight 0.8% in 20 parts of water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 20-25 DEG C, the compound emulsifying agent of 3-8 part modified carbon nano-tube and monomer weight 3% is joined in 2/3 monomer solution, add half initiator solution after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 1-2h at 70-72 DEG C; Then at 80-82 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2-3h; Wait to dropwise, continue to stir 2-3h at 80-82 DEG C, after being then warming up to 90-92 DEG C of stirring 2-3h, then be cooled to 25-30 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 25-30 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
Described ammoniacal liquor be containing ammonia massfraction be the aqueous solution of 25-28%.
The preparation method of the toughness reinforcing emulsion of described polyacrylic ester comprises the following steps (in step, number used is all with parts by weight):
1) at 20-25 DEG C, with vinylformic acid 2-5 part, ethyl propenoate 5-10 part, butyl acrylate 15-30 part, senecioate-hydroxypropyl acrylate 10-20 part, N-(1,1-dimethyl-3-oxo butyl) acrylamide 15-20 part, vinylbenzene 10-20 part is as monomer, join in 120-150 part water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by the benzoyl peroxide of monomer weight 1% in 20 parts of water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 20-25 DEG C, the emulsifying agent of monomer weight 2% is joined in 1/3 monomer solution, add 70% initiator solution after stirring 1-2h, in 1h, be warming up to 80 DEG C while stirring; Then at 80-82 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 3-4h; After dropwising, continue to stir 2-3h at 80-82 DEG C; Add remaining initiator solution again, after being warming up to 88-90 DEG C of continuation stirring 1-2h, be cooled to 25-28 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 15-20 part adipic dihydrazide, at 25-28 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester;
Described emulsifying agent adopts BASF AG's trade mark to be the tensio-active agent of L61 or P103;
Described ammoniacal liquor be containing ammonia massfraction be the aqueous solution of 25-28%.
Described cement is 42.5 grades of ordinary Portland cements;
Described rubble adopts bulk density to be 1600-1800kg/m
3, crush values 6-9%, water-intake rate 0.4-0.6% basaltic broken stone; This basaltic broken stone is made up of three kinds of graded particies of 5-10mm, 10-20mm and 20-25mm, and its percentage composition is respectively 40%, 50%, 10%;
Described fine aggregate is natural river sand, and its bulk density is 1500-1700kg/m
3, fineness modulus is 2.5-3.0, and silt content is less than 1.8%;
Described slag powders is S105 slag powders, and its specific surface area is greater than 350cm
2/ g, density is not less than 2.8g/cm
3;
Described flyash is I level flyash, and its specific surface area is greater than 400cm
2/ g, density is 2.6-2.8g/cm
3;
Described water reducer is polycarboxylic acids high efficiency plasticising water reducer, and water-reducing rate is 20-30%.
Described inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) stirring material A is poured in stirring material C in 3-6min, be finished down rear continuation and stir 10-15min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 90 ± 5%, temperature 20 ± 2 DEG C, maintenance 28 days.
compared with the prior art, technical scheme of the present invention has following novelty and beneficial effect:
The present invention have employed one " inorganic materials/polymer interpenetration network coordination plasticizing system " first.Be somebody's turn to do in " composite toughening system ", inorganic materials adopts " super fiber " carbon nanotube of excellent in mechanical performance---the material with most high specific strength can prepared at present, its length-to-diameter ratio, generally at more than 1000:1, is a kind of ideal concrete toughen and intensify material.
Be somebody's turn to do in " composite toughening system ", polymkeric substance then adopts two kinds of different polyacrylate dispersions: containing the monomer such as methyl methacrylate, hydroxyethyl methylacrylate in a kind of emulsion components, and after its solidification, intensity of material is higher; Containing the monomer such as ethyl propenoate, butyl acrylate in another kind of emulsion components, after its solidification, the snappiness of material is better.In the process of two kinds of polyacrylate dispersions crosslinking curing in concrete, microcosmic inierpeneirating network structure can be formed, thus make concrete material show good toughness, intensity, fatigue resistance and isotropy, bring great improvement to concrete performance.
In addition, the specific surface area due to carbon nanotube is large and specific surface energy is high, and easily tangling reunites forms block aggregate thus loses its excellent properties had.The present invention carries out modification by series of chemical to carbon nanotube, prepare the modified carbon nano-tube of chemical grafting treated Hydroxypropylcelliloxe, significantly to strengthen the repulsive interaction between carbon nano-tube material, simultaneously, the hydroxypropylcellulose of carbon nano tube surface is with more hydroxyl reactive group, there is very strong wetting ability, can with the hydrated product in concrete formation process, as can be connected with hydrogen bond equimolecular intermolecular forces between calcium hydroxide, gel of calcium silicate, ettringite etc., carbon nanotube is had water-soluble.Utilize the water-soluble of modified carbon nano-tube, the present invention prepares the polyacrylate dispersion containing modified carbon nano-tube, it is conducive in the crosslinking curing process of polyacrylate dispersion on the one hand, carbon nanotube fully can disperse in concrete, play the effect of bi-material coordination plasticizing better, make concrete general performance go out good toughness, intensity, fatigue resistance and isotropy; On the other hand, modified carbon nano-tube stable dispersion can be made in polyacrylate dispersion, make concrete preparation technology easier.
Above-mentioned measure can effectively improve concrete bending strength, tensile strength and deformability, highly beneficial to the overall mechanical property improving concrete product.Test result shows, compound high tenacity concrete provided by the present invention can show significant strain hardening or strain hardening feature under uniaxial direct tensile load or bending load effect, its bending strength can reach 19-29MPa, and tensile strength can reach 8-16MPa, and ultimate compression strength can reach 78-95MPa.
Patent of invention ZL200810048960.X adopts rubber powder as toughening material, and prepare a kind of high tenacity concrete, its bending strength (28d) is 5.05-6.86MPa.Patent of invention ZL200910187472.1 adopts polyvinyl alcohol fiber, polyethylene fiber peacekeeping aromatic polyamide fibre as toughening material, and prepare a kind of high-tenacity fiber concrete, its bending strength (28d) is 10-20MPa.Patent of invention ZL201010266982.0 adopt diameter be 13 μm, length be the short basalt fibre of cutting of 10mm as toughening material, prepare a kind of high tenacity concrete, its bending strength (28d) is 4.3-6.5MPa.Application for a patent for invention 201210003519.6 adopts polypropylene fibre or glass fibre as toughening material, prepares a kind of high tenacity concrete, and its optimum bending strength (28d) is 10MPa.Application for a patent for invention 201210566338.4 adopts polyacrylonitrile fibre and steel fiber as toughening material, prepares a kind of high tenacity concrete, and its optimum bending strength (28d) is 8.6MPa.Compare with it, the concrete bending strength of compound high tenacity prepared by the present invention is significantly better than other toughness reinforcing concrete products, the bridge floor of the over strait and river-spanning bridge of high ferro viaduct, large span can be applied to, and the fields such as all types of tunnel arch wall such as subway, it is high in technological content, tool novelty, and there is good application prospect.
Embodiment
The present invention adopts water first, a kind of high tenacity concrete prepared by polyacrylate dispersion, the toughness reinforcing emulsion of polyacrylic ester, cement, rubble, fine aggregate, slag powders, flyash and water reducer containing modified carbon nano-tube.More being convenient to make content of the present invention understand, below in conjunction with embodiment, technical solutions according to the invention are described further, but the present invention being not limited only to this.
Carbon nanotube used adopts commercially available multi-walled carbon nano-tubes, its major dimension index: purity >98%; Length 10-30um; Caliber 50-80nm; Specific surface area >40 (m
2/ g); Tap density 0.18g/cm
3;
Hydroxypropylcelliloxe used is commercially available, its major dimension index: hydroxypropyl content 60-66%; Weight-average molecular weight is 80000; Weight loss on drying≤5%; Residue on ignition≤0.5%; PH (1% aqueous solution, 25) is 5.0-8.5; Granularity: 100 order percent of pass >=98.5%, 80 order percent of pass 100%; Proportion 1.26-1.31.
Ammoniacal liquor used be containing ammonia massfraction be the aqueous solution of 26%;
Cement used is 42.5 grades of ordinary Portland cements.
Rubble used adopts bulk density to be 1600kg/m
3, crush values 6%, water-intake rate 0.4% basaltic broken stone; This basaltic broken stone is made up of three kinds of graded particies of 5mm, 10mm and 20mm, and its percentage composition is respectively 40%, 50%, 10%.
Fine aggregate used is natural river sand, and its bulk density is 1500kg/m
3, fineness modulus is 2.5, and silt content is 1.8%.
Slag powders used is S105 slag powders, and its specific surface area is 400cm
2/ g, density is 2.85g/cm
3.
Flyash used is I level flyash, and its specific surface area is 400cm
2/ g, density is 2.8g/cm
3.
Water reducer used is the polycarboxylic acids high efficiency plasticising water reducer of BASF AG trade mark Melflux1641F, and water-reducing rate is 20%, and its outward appearance is pale yellow powder, and bulk density is 30g/100cm
3, pH is 6.5 (20 ° of C, 20% solution).
The preparation method of modified carbon nano-tube comprises the steps:
1) carbon nanotube 1830g is joined in the nitration mixture of the 9L vitriol oil and 6L concentrated nitric acid composition, ultrasonic 24h post-heating backflow 48h, after centrifugation, carbon nanotube is washed, vacuum-drying 24h at 65 DEG C, obtain the carbon nanotube 1800g of surface containing carboxyl functional group;
2) by the carbon nanotube 1800g of above-mentioned surface containing carboxyl functional group, join in 15L thionyl chloride, after stirring 3h at 30 DEG C, be warmed up to 80 DEG C of return stirring 24h, then thionyl chloride is removed under reduced pressure, carbon nanotube after anhydrous propanone is cleaned is vacuum-drying 24h at room temperature, obtains the carbon nanotube 1765g of surface containing acid chloride groups;
3) by the carbon nanotube 1765g of above-mentioned surface containing acid chloride groups, join in the 8.5LN-methyl-2-pyrrolidone containing 490g quadrol and 100ml triethylamine, 5h is stirred at 30 DEG C, after stirring 24h again at 80 DEG C, remove N-Methyl pyrrolidone and triethylamine under reduced pressure, after washing with water, at room temperature vacuum-drying 36h, obtains the carbon nanotube 1730g of surface with amino;
4) by the carbon nano tube derivative 1730g of above-mentioned surface with amino, join in the 6.5L tetrahydrofuran (THF) containing 280g trimeric cyanamide at 3 DEG C, and continue to stir 48h at 3 DEG C after, remove tetrahydrofuran (THF) under reduced pressure, after anhydrous propanone is cleaned, vacuum-drying 16h at 10 DEG C, obtains the carbon nanotube 1710g of surface with chloride triazine ring;
5) above-mentioned surface there is the carbon nanotube 1710g of chloride triazine ring, at the anhydrous N of 5.5L, in N '-dimethyl methane amide after stirring and dissolving, at 35 DEG C, be slowly added drop-wise to 1.6L in 12h is dissolved with in the anhydrous propanone solution of 650g Hydroxypropylcelliloxe, after dropwising after 50 DEG C of isothermal reaction 36h, be warming up to 90 DEG C again and isothermal reaction 48h, wash with water after removing solvent under reduced pressure, vacuum-drying 48h at 40 DEG C, obtains the water-soluble modified carbon nanotube 1950g of chemical grafting treated Hydroxypropylcelliloxe; In this modified carbon nano-tube, the mass percent of hydroxypropylcellulose is 16%.
embodiment 1
1., containing the polyacrylate dispersion of modified carbon nano-tube, its preparation method comprises the steps:
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 20 DEG C, methyl methacrylate 2.5kg, Hydroxyethyl acrylate 2kg, hydroxyethyl methylacrylate 1.5kg, methoxyethyl acrylate 1.5kg, vinylformic acid 0.8kg are mixed as monomer, join in 14kg water together with 0.03kg lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by 66.4g Potassium Persulphate in 2kg water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 20 DEG C, 0.5kg modified carbon nano-tube and 249g compound emulsifying agent are joined in the monomer solution of 2/3, add the initiator solution of half after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 1.5h at 70 DEG C; Then at 80 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2.5h; Wait to dropwise, continue to stir 2.5h at 80 DEG C; Then after being warming up to 90 DEG C of stirring 2.5h, then 25 DEG C are cooled to, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 25 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
In described polyacrylate dispersion, the mass percent of modified carbon nano-tube is 1%.
2. the preparation method of the toughness reinforcing emulsion of polyacrylic ester comprises the following steps:
1) at 20 DEG C, with vinylformic acid 0.4kg, ethyl propenoate 0.7kg, butyl acrylate 2.6kg, senecioate-hydroxypropyl acrylate 1.5kg, N-(1,1-dimethyl-3-oxo butyl) acrylamide 1.7kg, vinylbenzene 1.5kg be as monomer, join in 14kg water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by 84g benzoyl peroxide in 2kg water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 20 DEG C, 168g tensio-active agent L61 is joined in the monomer solution of 1/3, add the initiator solution of 70% after stirring 1h, in 1h, be warming up to 80 DEG C while stirring; Then at 80 DEG C, slowly drip the initiator solution of 20% and remaining monomer solution while stirring, drip process used time 3.5h; After dropwising, continue to stir 2.5h at 80 DEG C; Add remaining initiator solution again, after being warming up to 88 DEG C of continuation stirring 1.5h, be cooled to 25 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 1.6kg adipic dihydrazide, at 25 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) under whipped state, stirring material A is poured in 4min and stirs in material C, be finished down rear continuation and stir 13min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 85%, temperature 18 DEG C, maintenance 28 days.
Wherein the proportioning of each component is as follows:
Water 145kg/m
3;
Containing the polyacrylate dispersion 13kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 25kg/m of polyacrylic ester
3;
Cement 400kg/m
3;
Rubble 980kg/m
3;
Fine aggregate 650kg/m
3;
Slag powders 25kg/m
3;
Flyash 55kg/m
3;
Water reducer 4.8kg/m
3.
Concrete basic mechanical performance obtained by the present embodiment is tested, testing method and result as follows:
(1) bending strength
Sample dimensions: 400mm × 100mm × 15mm
Testing method: four-point bending, three branches load, and test span is 300mm
Bending strength: 24MPa
(2) ultimate compression strength
Sample dimensions: 40mm × 40mm × 160mm
Testing method: prism uniaxial compression
Ultimate compression strength: 85MPa
(3) tensile strength
Sample dimensions: 350mm × 50mm × 15mm
Testing method: uniaxial extension
Tensile strength: 12MPa
Test result shows, the high tenacity concrete that the present embodiment provides, and its bending strength can reach 24MPa, tensile strength can reach 12MPa, ultimate compression strength can reach 85MPa, can be applied to the bridge floor of large span river-spanning bridge over strait and high ferro viaduct, and the fields such as all types of tunnel arch wall such as subway.
embodiment 2
1., containing the polyacrylate dispersion of modified carbon nano-tube, its preparation method comprises the steps:
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 22 DEG C, methyl methacrylate 2kg, Hydroxyethyl acrylate 1.5kg, hydroxyethyl methylacrylate 1kg, methoxyethyl acrylate 1kg, vinylformic acid 0.5kg are mixed as monomer, join in 13kg water together with 0.02kg lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by 48g Potassium Persulphate in 2kg water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 22 DEG C, 0.3kg modified carbon nano-tube and 180g compound emulsifying agent are joined in the monomer solution of 2/3, add the initiator solution of half after stirring 5h, in 1h, be warming up to 72 DEG C while stirring, and continue to stir 1h at 72 DEG C; Then at 82 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2h; Wait to dropwise, continue to stir 2h at 82 DEG C; Then after being warming up to 92 DEG C of stirring 2h, then 30 DEG C are cooled to, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 30 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
In described polyacrylate dispersion, the mass percent of modified carbon nano-tube is 2.1%.
2. the preparation method of the toughness reinforcing emulsion of polyacrylic ester comprises the following steps:
1) at 22 DEG C, with vinylformic acid 0.2kg, ethyl propenoate 0.5kg, butyl acrylate 1.5kg, senecioate-hydroxypropyl acrylate 1kg, N-(1,1-dimethyl-3-oxo butyl) acrylamide 1.5kg, vinylbenzene 1kg be as monomer, join in 12kg water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by 57g benzoyl peroxide in 2kg water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 22 DEG C, 104g tensio-active agent P103 is joined in 1/3 monomer solution, add 70% initiator solution after stirring 1.5h, in 1h, be warming up to 80 DEG C while stirring; Then at 80 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 3h; After dropwising, continue to stir 2h at 80 DEG C; Add remaining initiator solution again, after being warming up to 90 DEG C of continuation stirring 1h, be cooled to 28 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 1.5kg adipic dihydrazide, at 28 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) under whipped state, stirring material A is poured in 3min and stirs in material C, be finished down rear continuation and stir 10min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 90%, temperature 20 DEG C, maintenance 28 days.
Wherein the proportioning of each component is as follows:
Water 130kg/m
3;
Containing the polyacrylate dispersion 10kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 20kg/m of polyacrylic ester
3;
Cement 385kg/m
3;
Rubble 950kg/m
3;
Fine aggregate 550kg/m
3;
Slag powders 20kg/m
3;
Flyash 40kg/m
3;
Water reducer 3.5kg/m
3.
The method identical by embodiment 1 is tested, result shows, the compound high tenacity concrete that the present embodiment provides, its bending strength is 19MPa, tensile strength is 8MPa, ultimate compression strength is 78MPa, can be applied to the bridge floor of large span river-spanning bridge over strait and high ferro viaduct, and the fields such as all types of tunnel arch wall such as subway.
embodiment 3
1., containing the polyacrylate dispersion of modified carbon nano-tube, its preparation method comprises the steps:
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 25 DEG C, methyl methacrylate 3kg, Hydroxyethyl acrylate 2.5kg, hydroxyethyl methylacrylate 2kg, methoxyethyl acrylate 2kg, vinylformic acid 1kg are mixed as monomer, join in 16kg water together with 0.05kg lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by 84g Potassium Persulphate in 2kg water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 25 DEG C, 0.8kg modified carbon nano-tube and 315g compound emulsifying agent are joined in the monomer solution of 2/3, add the initiator solution of half after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 1h at 70 DEG C; Then at 80 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 3h; Wait to dropwise, continue to stir 3h at 80 DEG C; Then after being warming up to 90 DEG C of stirring 3h, then 28 DEG C are cooled to, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 28 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
In described polyacrylate dispersion, the mass percent of modified carbon nano-tube is 3.5%.
2. the preparation method of the toughness reinforcing emulsion of polyacrylic ester comprises the following steps:
1) at 22 DEG C, with vinylformic acid 0.5kg, ethyl propenoate 1kg, butyl acrylate 3kg, senecioate-hydroxypropyl acrylate 2kg, N-(1,1-dimethyl-3-oxo butyl) acrylamide 2kg, vinylbenzene 2kg be as monomer, join in 15kg water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by 105g benzoyl peroxide in 2kg water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 22 DEG C, 210g tensio-active agent L61 is joined in 1/3 monomer solution, add 70% initiator solution after stirring 2h, in 1h, be warming up to 80 DEG C while stirring; Then at 81 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 4h; After dropwising, continue to stir 3h at 81 DEG C; Add remaining initiator solution again, after being warming up to 88 DEG C of continuation stirring 2h, be cooled to 26 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 2kg (15-20) adipic dihydrazide, at 26 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) under whipped state, stirring material A is poured in 6min and stirs in material C, be finished down rear continuation and stir 15min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 95%, temperature 22 DEG C, maintenance 28 days.
Wherein the proportioning of each component is as follows:
Water 160kg/m
3;
Containing the polyacrylate dispersion 15kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 30kg/m of polyacrylic ester
3;
Cement 410kg/m
3;
Rubble 1050kg/m
3;
Fine aggregate 750kg/m
3;
Slag powders 30kg/m
3;
Flyash 65kg/m
3;
Water reducer 6kg/m
3.
The method identical by embodiment 1 is tested, result shows, the compound high tenacity concrete that the present embodiment provides, its bending strength is 29MPa, tensile strength is 16MPa, ultimate compression strength is 95MPa, can be applicable to the bridge floor of the over strait and river-spanning bridge of high ferro viaduct, large span, and the fields such as all types of tunnel arch wall such as subway.
embodiment 4
1., containing the polyacrylate dispersion of modified carbon nano-tube, its preparation method comprises the steps:
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 23 DEG C, methyl methacrylate 2.3kg, Hydroxyethyl acrylate 1.8kg, hydroxyethyl methylacrylate 1.3kg, methoxyethyl acrylate 1.3kg, vinylformic acid 0.6kg are mixed as monomer, join in 15kg water together with 0.03kg lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by 58.4g Potassium Persulphate in 2kg water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 23 DEG C, 0.4kg modified carbon nano-tube and 219g compound emulsifying agent are joined in the monomer solution of 2/3, add the initiator solution of half after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 2h at 70 DEG C; Then at 82 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2h; Wait to dropwise, continue to stir 3h at 82 DEG C; Then after being warming up to 92 DEG C of stirring 2h, then 30 DEG C are cooled to, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 30 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
In described polyacrylate dispersion, the mass percent of modified carbon nano-tube is 2.7%.
2. the preparation method of the toughness reinforcing emulsion of polyacrylic ester comprises the following steps:
1) at 23 DEG C, with vinylformic acid 0.3kg, ethyl propenoate 0.6kg, butyl acrylate 1.9kg, senecioate-hydroxypropyl acrylate 1.3kg, N-(1,1-dimethyl-3-oxo butyl) acrylamide 1.6kg, vinylbenzene 1.3kg be as monomer, join in 13kg water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by 70g benzoyl peroxide in 2kg water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 23 DEG C, 140g tensio-active agent P103 is joined in 1/3 monomer solution, add 70% initiator solution after stirring 1h, in 1h, be warming up to 80 DEG C while stirring; Then at 80 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 3h; After dropwising, continue to stir 2h at 80 DEG C; Add remaining initiator solution again, after being warming up to 88 DEG C of continuation stirring 1h, be cooled to 25 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 1.8kg adipic dihydrazide, at 25 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) under whipped state, stirring material A is poured in 3min and stirs in material C, be finished down rear continuation and stir 11min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 92%, temperature 21 DEG C, maintenance 28 days.
Wherein the proportioning of each component is as follows:
Water 140kg/m
3;
Containing the polyacrylate dispersion 11kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 22kg/m of polyacrylic ester
3;
Cement 395kg/m
3;
Rubble 970kg/m
3;
Fine aggregate 600kg/m
3;
Slag powders 23kg/m
3;
Flyash 50kg/m
3;
Water reducer 4kg/m
3.
The method identical by embodiment 1 is tested, result shows, the compound high tenacity concrete that the present embodiment provides, its bending strength is 22MPa, tensile strength is 10MPa, ultimate compression strength is 81MPa, can be applied to the bridge floor of large span river-spanning bridge over strait and high ferro viaduct, and the fields such as all types of tunnel arch wall such as subway.
embodiment 5
1., containing the polyacrylate dispersion of modified carbon nano-tube, its preparation method comprises the steps:
1) by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 be hybridly prepared into compound emulsifying agent;
2) at 20 DEG C, methyl methacrylate 2.8kg, Hydroxyethyl acrylate 2.3kg, hydroxyethyl methylacrylate 1.8kg, methoxyethyl acrylate 1.8kg, vinylformic acid 0.9kg are mixed as monomer, join in 16kg water together with 0.04kg lauryl mercaptan again, be hybridly prepared into monomer solution;
3) take Potassium Persulphate as initiator, joined by 76.8g Potassium Persulphate in 2kg water, stirring at room temperature, to dissolving completely, obtains initiator solution;
4) at 20 DEG C, 0.8kg modified carbon nano-tube and 288g compound emulsifying agent are joined in the monomer solution of 2/3, add the initiator solution of half after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 1h at 70 DEG C; Then at 80 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2h; Wait to dropwise, continue to stir 3h at 80 DEG C; Then after being warming up to 90 DEG C of stirring 3h, then 26 DEG C are cooled to, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 26 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
In described polyacrylate dispersion, the mass percent of modified carbon nano-tube is 1.8%.
2. the preparation method of the toughness reinforcing emulsion of polyacrylic ester comprises the following steps:
1) at 20 DEG C, with vinylformic acid 0.5kg, ethyl propenoate 0.9kg, butyl acrylate 2.8kg, senecioate-hydroxypropyl acrylate 1.8kg, N-(1,1-dimethyl-3-oxo butyl) acrylamide 1.9kg, vinylbenzene 1.8kg be as monomer, join in 15kg water, be stirred to and dissolve completely, obtain monomer solution;
2) take benzoyl peroxide as initiator, joined by 97g benzoyl peroxide in 2kg water, stirring at room temperature is dissolved completely to it, is formed homogeneous initiator solution;
3) at 20 DEG C, 168g tensio-active agent L61 is joined in 1/3 monomer solution, add 70% initiator solution after stirring 1h, in 1h, be warming up to 80 DEG C while stirring; Then at 80 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 4h; After dropwising, continue to stir 3h at 80 DEG C; Add remaining initiator solution again, after being warming up to 89 DEG C of continuation stirring 2h, be cooled to 27 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add 1.9kg adipic dihydrazide, at 27 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity, specifically comprises the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, be finished down rear continuations and stir 10min, must stir and expect B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) under whipped state, stirring material A is poured in 5min and stirs in material C, be finished down rear continuation and stir 14min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, vibrate shaping after under the condition of relative humidity 89%, temperature 22 DEG C, maintenance 28 days.
Wherein the proportioning of each component is as follows:
Water 150kg/m
3;
Containing the polyacrylate dispersion 14kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 28kg/m of polyacrylic ester
3;
Cement 405kg/m
3;
Rubble 1000kg/m
3;
Fine aggregate 700kg/m
3;
Slag powders 28kg/m
3;
Flyash 60kg/m
3;
Water reducer 5.5kg/m
3.
The method identical by embodiment 1 is tested, result shows, the compound high tenacity concrete that the present embodiment provides, its bending strength is 26MPa, tensile strength is 15MPa, ultimate compression strength is 89MPa, can be applicable to the bridge floor of the over strait and river-spanning bridge of high ferro viaduct, large span, and the fields such as all types of tunnel arch wall such as subway.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. inorganic materials/polymkeric substance compound high tenacity concrete, is characterized in that: described compound high tenacity concrete is made up of water, polyacrylate dispersion, the toughness reinforcing emulsion of polyacrylic ester, cement, rubble, fine aggregate, slag powders, flyash and water reducer containing modified carbon nano-tube; The proportioning of each component is as follows:
Water 130-160kg/m
3;
Containing the polyacrylate dispersion 10-15kg/m of modified carbon nano-tube
3;
The toughness reinforcing emulsion 20-30kg/m of polyacrylic ester
3;
Cement 385-410kg/m
3;
Rubble 950-1050kg/m
3;
Fine aggregate 550-750kg/m
3;
Slag powders 20-30kg/m
3;
Flyash 40-65kg/m
3;
Water reducer 3.5-6kg/m
3;
Described containing in the polyacrylate dispersion of modified carbon nano-tube, the mass percent of modified carbon nano-tube is 1-3.5%;
Described modified carbon nano-tube be by carbon nanotube after nitration mixture oxide treatment, react with thionyl chloride, make the converting carboxylate groups of carbon nano tube surface be acid chloride groups, more respectively with quadrol and trimeric cyanamide generation nucleophilic substitution reaction, obtain the carbon nanotube of surperficial chloride triazine ring; Then by itself and Hydroxypropylcelliloxe generation substitution reaction, the water-soluble modified carbon nanotube of chemical grafting treated Hydroxypropylcelliloxe is obtained;
In described modified carbon nano-tube, the mass percent of hydroxypropylcellulose is 16%;
Described nitration mixture is that 3:2 is formulated by volume by the vitriol oil and concentrated nitric acid;
The described polyacrylate dispersion containing modified carbon nano-tube joins in 2/3 monomer solution by modified carbon nano-tube and compound emulsifying agent, half initiator solution is added after stirring 5h, in 1h, be warming up to 70 DEG C while stirring, and continue to stir 1-2h at 70-72 DEG C; Then at 80-82 DEG C, slowly drip remaining monomer solution and initiator solution while stirring, drip process used time 2-3h; Wait to dropwise, continue to stir 2-3h at 80-82 DEG C, after being then warming up to 90-92 DEG C of stirring 2-3h, then be cooled to 25-30 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; After continuing to stir 1h at 25-30 DEG C, obtain the described polyacrylate dispersion containing modified carbon nano-tube;
Containing modified carbon nano-tube polyacrylate dispersion preparation process described in compound emulsifying agent be by OP-10 and Sodium dodecylbenzene sulfonate in mass ratio 1:2 mix;
Containing modified carbon nano-tube polyacrylate dispersion preparation process described in monomer solution be monomer and lauryl mercaptan are added to the water be hybridly prepared into;
Containing modified carbon nano-tube polyacrylate dispersion preparation process described in monomer be methyl methacrylate, Hydroxyethyl acrylate, hydroxyethyl methylacrylate, methoxyethyl acrylate and acrylic acid mixture;
Containing modified carbon nano-tube polyacrylate dispersion preparation process described in initiator be Potassium Persulphate;
Containing modified carbon nano-tube polyacrylate dispersion preparation process described in ammoniacal liquor be containing ammonia massfraction be the aqueous solution of 25-28%;
The toughness reinforcing emulsion of described polyacrylic ester is joined by emulsifying agent in 1/3 monomer solution, adds 70% initiator solution, in 1h, be warming up to 80 DEG C while stirring after stirring 1-2h; Then at 80-82 DEG C, slowly drip 20% initiator solution and remaining monomer solution while stirring, drip process used time 3-4h; After dropwising, continue to stir 2-3h at 80-82 DEG C; Add remaining initiator solution again, after being warming up to 88-90 DEG C of continuation stirring 1-2h, be cooled to 25-28 DEG C, with the pH regulator to 8 of ammoniacal liquor by emulsion; Finally add adipic dihydrazide, at 25-28 DEG C, stir 2h, obtain the toughness reinforcing emulsion of polyacrylic ester;
Emulsifying agent described in the toughness reinforcing emulsion preparation process of polyacrylic ester adopts BASF AG's trade mark to be the tensio-active agent of L61 or P103;
Described in the toughness reinforcing emulsion preparation process of polyacrylic ester, initiator is benzoyl peroxide;
Monomer described in the toughness reinforcing emulsion preparation process of polyacrylic ester is vinylformic acid, ethyl propenoate, butyl acrylate, senecioate-hydroxypropyl acrylate, N-(1,1-dimethyl-3-oxo butyl) acrylamide and cinnamic mixture;
Ammoniacal liquor described in the toughness reinforcing emulsion preparation process of polyacrylic ester be containing ammonia massfraction be the aqueous solution of 25-28%.
2. inorganic materials/polymkeric substance compound high tenacity concrete according to claim 1, is characterized in that: described cement is 42.5 grades of ordinary Portland cements;
Described rubble adopts bulk density to be 1600-1800kg/m
3, crush values 6-9%, water-intake rate 0.4-0.6% basaltic broken stone; This basaltic broken stone is made up of three kinds of graded particies of 5-10mm, 10-20mm and 20-25mm, and its percentage composition is respectively 40%, 50%, 10%;
Described fine aggregate is natural river sand, and its bulk density is 1500-1700kg/m
3, fineness modulus is 2.5-3.0, and silt content is less than 1.8%;
Described slag powders is S105 slag powders, and its specific surface area is greater than 350cm
2/ g, density is not less than 2.8g/cm
3;
Described flyash is I level flyash, and its specific surface area is greater than 400cm
2/ g, density is 2.6-2.8g/cm
3;
Described water reducer is polycarboxylic acids high efficiency plasticising water reducer, and water-reducing rate is 20-30%.
3. inorganic materials/concrete preparation method of polymkeric substance compound high tenacity as claimed in claim 1, is characterized in that: specifically comprise the following steps:
1) water reducer is added to the water, material A after stirring 40min, must be stirred;
2), after fine aggregate and rubble are loaded stirring 15min in concrete mixer, in 5min, slowly pour the polyacrylate dispersion containing modified carbon nano-tube into stirrer, continue to stir 10min and must stir material B;
3) cement, slag powders and flyash are poured in stirring material B, after stirring 15min, toughness reinforcing for polyacrylic ester emulsion is poured in 10min, and continue to stir 5min, must stir and expect C;
4) stirring material A is poured in stirring material C in 3-6min, be finished down rear continuation and stir 10-15min, obtain high tenacity concrete-agitating material D;
5) the stirring material D of step 4) poured out, pour into a mould, the shaping laggard rower that vibrates supports; The condition that described mark is supported is: under the condition of relative humidity 90 ± 5%, temperature 20 ± 2 DEG C, maintenance 28 days.
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| CN101239801A (en) * | 2008-03-14 | 2008-08-13 | 哈尔滨工业大学 | Preparation of carbon nano-tube/cement self-enhancing damping composite material damping ratio testing method |
| CN102936113A (en) * | 2011-08-15 | 2013-02-20 | 青岛理工大学 | Hybrid nanocomposite material used for buildings and preparation method thereof |
| CN103011730A (en) * | 2012-12-31 | 2013-04-03 | 东南大学 | Fibre-polymer compound toughened concrete and preparation method for same |
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