CN108793892A - A kind of corrosion-prevention rust-resistance concrete and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of corrosion-prevention rust-resistance concrete and preparation method thereof, belong to building material field, the corrosion-prevention rust-resistance concrete includes 150-210 parts of 1-5 parts of 10-15 parts of 2.46-5.38 parts of 5-8 parts of 1.55-4.78 parts of 78-93 parts of 25-20 parts of 66-89 parts of 637-926 parts of 374-453 parts of 248-292 parts of cement, sand, rubble, flyash, torispherical glass powder, miberal powder, swelling agent, the rust inhibitor, water-reducing agent, glass fibre, binder, the water in terms of parts by weight.It has the advantages that internal structure is fine and close, anti-corrosion resistance is elegant, durability is high.

Description

A kind of corrosion-prevention rust-resistance concrete and preparation method thereof

Technical field

The present invention relates to building material fields, more specifically, it is related to a kind of corrosion-prevention rust-resistance concrete and its preparation side Method.

Background technology

Concrete, referred to as concrete are to be used the general designation for the cementing integral engineered composite material that gathers materials by cementitious material For cement as cementitious material, sand, masonry are to gather materials, and can by a certain percentage be coordinated with water, additive etc., agitated and obtain, extensively Applied to civil engineering.

In recent years, with the economic sustained and rapid development in China, the infrastructure construction dynamics and scale in China are also continuous It increases, the application of concrete component is also more and more.It is tension reinforcing steel bar as early as possible in concrete component production, accelerates template turnover With pedestal utilization rate, and accelerate engineering construction progress and to complete as early as possible, realizes maximum economic benefit.

For marine structure, sea sand building and varieties in saline-alkali areas building, contain a large amount of chlorine in coastal area or ambient enviroment Ion and sulfate ion easily generate corrosion effect to reinforcing rib meter concrete, reduce concrete basicity, destroy the blunt of rebar surface Change film, cause steel bar corrosion and expansion, further result in crack and peeling, structure uses function and mechanical property It can constantly deteriorate.And concrete is chronically in the environment of this high chloride ion and sulfate ion, it can be because of Chloride Attack Concrete leads to reinforcement corrosion and makes structure that Random early Detection occur, loses the endurance quality of structure so that concrete structure is split Seam, the normal usage function for destroying, peeling off, even seriously affecting structure, reduce the actual life of engineering.

Invention content

In view of the deficiencies of the prior art, the present invention intends to provide a kind of corrosion-prevention rust-resistance concrete and its preparation Method so that the corrosion-prevention rust-resistance concrete of preparation has the advantages that internal structure is fine and close, anti-corrosion resistance is elegant, durability is high.

The present invention above-mentioned technical purpose technical scheme is that：

A kind of corrosion-prevention rust-resistance concrete includes 374-453 parts of 248-292 parts of cement, sand, rubble 637- in terms of parts by weight 926 parts, 66-89 parts of flyash, 15-20 parts of torispherical glass powder, 78-93 parts of miberal powder, 1.55-4.78 parts of swelling agent, compound resistance Become rusty 5-8 parts of agent, 2.46-5.38 parts of water-reducing agent, 10-15 parts of glass fibre, 1-5 parts of binder, 150-210 parts of water.

Preferably：The rust inhibitor is by 15-20 parts of pentalyn, the potassium tartrate in terms of parts by weight 5-10 parts of sodium, 10-15 parts of Ethylenediaminetetraacetic Acid Calcium Salt salt, 1-3 parts of heteroauxin, 0.5-2.5 parts of zirconium silicate, N- [2- (2- '-hydroxyethoxies Base) -4- nitrobenzophenones] 2-3 parts of ethanol amine, N, 30-50 part of 4-6 parts of N- dimethyl -2- (two benzyloxies) ethamine and water mix It stirs evenly and obtains.

Environmentally safe without nitrite anions in the rust inhibitor provided by the invention, chloride ion content is low, reduces mixed The probability of solidifying soil corrosion, alkali content is relatively low (1.0wt.%), avoids alkali and aggregate reaction, reduces later concrete cracking etc. Adverse effect, increases the actual endurance of concrete.Organic amine forms anionic membrane, resistance with organic alcohol amine in concrete surface Only free chloro ion enters concrete, extends the protected time.

Preferably：The binder is prepared by following methods：At 120-130 DEG C by methyl methacrylate, Brominated epoxy resin, DL- syringaresinols, nano-carbon powder, sodium metasilicate are added in vegetable oil, are stirred and heated to after mixing After 150-160 DEG C, under conditions of pressure is 2.0-2.5Mpa, 2-4 hours are kept the temperature to get the binder；With weight fraction Meter, 20-60 parts of methyl methacrylate, 10-20 parts of brominated epoxy resin, 10-30 parts of DL- syringaresinols, sodium metasilicate 5-10 Part, 5-10 parts of nano-carbon powder, 20-50 parts of vegetable oil.

By using the binder of the present invention, mobility and cementitiousness are strong, are added in concrete slurry, can make up Gap existing for inside concrete so that concrete structure is fine and close, durability is high.

Preferably：The miberal powder is S105 grades of ground granulated blast furnace slags, and specific surface area 525cm2/g, fluidity ratio is 106%, Specific activity index 7d is 95%, 28d 115%.

By using ground granulated blast furnace slag, improve pore structure and intensity after concrete hardening, and since ore powder granularity is higher, Cement particle surface can be adsorbed on so that the Flocculated Cement structure being likely to form originally can not be formed, and similar water-reducing agent is played Effect, in the identical flowing velocity that can significantly improve concrete mix of water consumption, improves its mobile performance, and right The early stage pore structure for improving concrete has certain effect, and is conducive to the durability for improving concrete.

Preferably：The flyash is global shape, and grain size is continuously distributed and grain size≤3 μm, water demand ratio are not more than 95%.

By using global shape and the continuously distributed flyash of grain size, with cement granules in microcosmic upper formation grading system, The sand that cooperation is added is as gathering materials, it is ensured that there is preferable intensive after concrete curing, improve the intensity of concrete with It satisfies the use demand, the collective effect with spherical glass powder spike, water-reducing effect is notable, and water requirement substantially reduces；Consider simultaneously Flyash spike has " active effect ", " interfacial effect " and " diminishing effect ", and the dual coupling with water-reducing agent also helps In the later strength for improving concrete.

Preferably：The swelling agent is azodicarbonamide plastic expansion agent.

By selecting azodicarbonamide plastic expansion agent, make corrosion-prevention rust-resistance concrete plastic stage that can generate microdilatancy To compensate plastic stage contraction, internal structure is fine and close, and Anti-Chloride Ion Penetration is preferable, and durability is preferable.

Preferably：The cement is P.O42.5 grades of Portland cements.

Have while by selecting P.O42.5 grades of Portland cements to make concrete obtained that there is some strength The lower heat of hydration, in cement hydration process, the heat of generation is less so that the internal-external temperature difference of concrete is smaller, and reduction is split The generation of seam.

Preferably：The sand includes that weight ratio is 7:The sand of the sand and 50-100 mesh of 3 10-30 mesh, the sand are Washing drying river sand.

Preferably：The rubble includes that mass ratio is 3:The rubble and particle size range that 7 particle size range is 0-5mm are 6- The mould degree of counting accurately of the rubble of 20mm, rubble is 1.5.

Made by selecting the washing of different-grain diameter range to dry river sand and rubble, mixture when being prepared as concrete The gap obtained between corrosion-prevention rust-resistance concrete can be filled, and corrosion-prevention rust-resistance concrete structure obtained is closely knit, and intensity is higher.

The present invention above-mentioned technical purpose technical scheme is that：

A kind of preparation method of corrosion-prevention rust-resistance concrete, successively by cement, sand, rubble, flyash, miberal powder, torispherical glass powder, Swelling agent, the rust inhibitor, glass fibre, binder are added in concrete mixer and stir evenly, while water-reducing agent being added Enter into concrete mixing water and be uniformly mixed, then water and water-reducing agent mixing liquid are added in blender, are sufficiently stirred It is drawn off after 2-3 minutes, a kind of corrosion-prevention rust-resistance concrete is made.

In conclusion the invention has the advantages that：

The first, without nitrite anions in the rust inhibitor provided by the invention, environmentally safe, chloride ion content is low, reduces The probability of concrete corrosion, alkali content is relatively low (1.0wt.%), avoids alkali and aggregate reaction, reduces later concrete cracking Deng adverse effect, the actual endurance of concrete is increased.Organic amine forms anionic membrane with organic alcohol amine in concrete surface, It prevents free chloro ion from entering concrete, extends the protected time.

The second, the present invention is using global shape and the continuously distributed flyash of grain size, with cement granules in microcosmic upper formation grade With system, coordinates the sand of addition to be used as and gather materials, it is ensured that there is preferable intensive after concrete curing, improve concrete Intensity is to satisfy the use demand, and the collective effect with spherical glass powder spike, water-reducing effect is notable, and water requirement substantially reduces；Together When consider flyash spike have " active effect ", " interfacial effect " and " diminishing effect ", the dual coupling with water-reducing agent, Also contribute to improve the later strength of concrete.

Azodicarbonamide is added as plastic expansion agent in third, the present invention, makes corrosion-prevention rust-resistance concrete plastic stage just Microdilatancy can be generated to compensate plastic stage contraction, internal structure is fine and close, and Anti-Chloride Ion Penetration is preferable, and durability is preferable.

4th, the present invention provides a kind of binders, and mobility and cementitiousness are strong, are added in concrete slurry, Gap existing for inside concrete can be made up so that concrete structure is fine and close, durability is high.

Specific implementation mode

Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under the concept thereof of the present invention The simple modifications of bright preparation method belong to the scope of protection of present invention.

The raw material used in following embodiment is both from commercially available, wherein flyash is that F I grade of flyash of class is produced in Tianjin, carefully Degree 7.9%, water requirement 93%, loss on ignition 3.05%；Water-reducing agent is polycarboxylate water-reducer, the poly- carboxylics of AN4000 generated using Beijing Sour series high-performance dehydragent, density 1.049g/cm3, pH value 5.8, water-reducing rate 32%, air content 4.0%, solid content 22.16%, Slump 1h ongoing change 10mm；Wet concentration drinking water, wherein pH value are 5-8, and chloride is with Cl^-Meter<1800mg/L, sulfate With SO₄ ^2-Meter<2100mg/L；Torispherical glass powder is unformed hard white powder, pH value 6-7, proportion 2.7g/ml, grain Diameter is 100 mesh；Glass fibre, a diameter of 0.1-5cm, compression strength 25MPa；Washing drying river sand clay content 1.5%, fineness Modulus 2.8；Rubble clay content 0.36%, needle, sheet content 3.9%.

The preparation example 1 of composite anti-corrosive corrosion inhibitor：Weigh pentalyn 15kg, sodium potassium tartrate tetrahydrate 5kg, Ethylenediaminetetraacetic Acid Calcium Salt Salt 10kg, heteroauxin 1kg, zirconium silicate 0.5kg, N- [2- (2- hydroxyl-oxethyls) -4- nitrobenzophenones] ethanol amine 2kg, N, 30min is mixed in N- dimethyl -2- (two benzyloxies) ethamine 4kg, and the water of 30kg is then added, and stirring 10min can make ?.

The preparation example 2 of composite anti-corrosive corrosion inhibitor：Weigh pentalyn 18kg, sodium potassium tartrate tetrahydrate 8kg, Ethylenediaminetetraacetic Acid Calcium Salt Salt 12kg, heteroauxin 2kg, zirconium silicate 1.8kg, N- [2- (2- hydroxyl-oxethyls) -4- nitrobenzophenones] ethanol amine 2.5kg, 30min is mixed in N, N- dimethyl -2- (two benzyloxies) ethamine 5kg, and the water of 40kg is then added, and stirs 10min It is made.

The preparation example 3 of composite anti-corrosive corrosion inhibitor：Weigh pentalyn 20kg, sodium potassium tartrate tetrahydrate 10kg, EDTA calcium Sodium salt 15kg, heteroauxin 3kg, zirconium silicate 2.5kg, N- [2- (2- hydroxyl-oxethyls) -4- nitrobenzophenones] ethanol amine 3kg, 30min is mixed in N, N- dimethyl -2- (two benzyloxies) ethamine 6kg, and the water of 50kg is then added, and stirs 10min It is made.

The preparation example 1 of binder：By methyl methacrylate 20kg, brominated epoxy resin 10kg, DL- fourth at 120 DEG C Botany bar gum phenol 10kg, nano-carbon powder 5kg, sodium metasilicate 5kg are added in the vegetable oil of 20kg after mixing, are stirred and heated to After 160 DEG C, in the case where pressure is 2.5Mpa, 2 hours are kept the temperature to get binder.

The preparation example 2 of binder：By methyl methacrylate 40kg, brominated epoxy resin 15kg, DL- fourth at 125 DEG C Botany bar gum phenol 20kg, nano-carbon powder 8kg, sodium metasilicate 8kg are added in the vegetable oil of 30kg after mixing, are stirred and heated to After 155 DEG C, in the case where pressure is 2.0Mpa, 3 hours are kept the temperature to get binder.

The preparation example 3 of binder：By methyl methacrylate 60kg, brominated epoxy resin 20kg, DL- fourth at 130 DEG C Botany bar gum phenol 30kg, nano-carbon powder 10kg, sodium metasilicate kg are added in the vegetable oil of 50kg after mixing, are stirred and heated to After 150 DEG C, in the case where pressure is 2.25Mpa, 4 hours are kept the temperature to get binder.

Embodiment 1：The washing of washing drying river sand 262kg, the 50-100 mesh of cement 248kg, 10-30 mesh is dried successively Rubble 447kg that rubble 191kg that river sand 112kg, grain size are 0-5mm, grain size are 6-20mm, flyash are 66kg, S105 grades high It is prepared by stove slag powders 78kg, torispherical glass powder 15kg, azodicarbonamide plastic expansion agent 1.55kg, composite anti-corrosive corrosion inhibitor The binder 1kg of composite anti-corrosive corrosion inhibitor 5kg, glass fibre 10kg, 1 gained of binder preparation example obtained by example 1 are added to mixed It is stirred evenly in solidifying soil blender, while polycarboxylic acid water reducing agent 2.46kg being mixed with the concrete mixing water of 150kg It is even, then water and polycarboxylic acid water reducing agent mixing liquid are added in blender, is sufficiently stirred 2 minutes and draws off, anti-corrosion is made Resistance rust concrete.

Embodiment 2：The washing of washing drying river sand 280kg, the 50-100 mesh of cement 256kg, 10-30 mesh is dried successively Rubble 560kg that rubble 240kg that river sand 120kg, grain size are 0-5mm, grain size are 6-20mm, flyash are 73kg, S105 grades high It is prepared by stove slag powders 86kg, torispherical glass powder 18kg, azodicarbonamide plastic expansion agent 3.32kg, composite anti-corrosive corrosion inhibitor The binder 3kg of composite anti-corrosive corrosion inhibitor 6.5kg, glass fibre 12kg, 2 gained of binder preparation example obtained by example 2 are added to It is stirred evenly in concrete mixer, while polycarboxylic acid water reducing agent 3.76kg being mixed with the concrete mixing water of 180kg Uniformly, then water and polycarboxylic acid water reducing agent mixing liquid are added in blender, are sufficiently stirred 2.5 minutes and draw off, be made Corrosion-prevention rust-resistance concrete.

Embodiment 3：The washing of washing drying river sand 318kg, the 50-100 mesh of cement 292kg, 10-30 mesh is dried successively Rubble 648kg that rubble 278kg that river sand 135kg, grain size are 0-5mm, grain size are 6-20mm, flyash are 89kg, S105 grades high It is prepared by stove slag powders 93kg, torispherical glass powder 20kg, azodicarbonamide plastic expansion agent 4.78kg, composite anti-corrosive corrosion inhibitor The binder 5kg of composite anti-corrosive corrosion inhibitor 8kg, glass fibre 15kg, 3 gained of binder preparation example obtained by 3 are added to coagulation It is stirred evenly in native blender, while polycarboxylic acid water reducing agent 5.38kg being uniformly mixed with the concrete mixing water of 210kg, Then water and polycarboxylic acid water reducing agent mixing liquid are added in blender, are drawn off after being sufficiently stirred 3 minutes, anti-corrosion resistance is made Become rusty concrete.

Comparative example 1：Successively by cement 254kg, hearthstone powder 140kg, 5-10mm continuous grading rubble 1007kg, river sand The compound corrosion inhibitor 6kg of 760kg, MCI, 3.4 parts of calcium sulphoaluminate class swelling agent are added in concrete mixer and stir evenly, together When polycarboxylic acid water reducing agent 3.15kg is uniformly mixed with the concrete mixing water of 174kg, then water and polyocarboxy acid type are subtracted Aqua mixing liquid is added in blender, is sufficiently stirred 2 minutes and is drawn off, and corrosion-prevention rust-resistance concrete is made.

Comparative example 2：The washing of washing drying river sand 318kg, the 50-100 mesh of cement 292kg, 10-30 mesh is dried successively Rubble 648kg that rubble 278kg that river sand 135kg, grain size are 0-5mm, grain size are 6-20mm, flyash are 89kg, S105 grades high Stove slag powders 93kg, calcium sulphoaluminate class swelling agent 4.78kg, sodium carbonate anti-corrosive rust inhibitor 8kg are added in concrete mixer and stir It mixes uniformly, while polycarboxylic acid water reducing agent 5.38kg being uniformly mixed with the concrete mixing water of 210kg, then by water and poly- Carboxylic acid type water-reducing agent mixing liquid is added in blender, is drawn off after being sufficiently stirred 3 minutes, and corrosion-prevention rust-resistance concrete is made.

Comparative example 3：Successively by cement 253kg, sand 798kg, stone 1015kg, slag powders 80kg, flyash 80kg, idol Nitrogen diformamide plastic expansion agent 4.78kg, YJ-504 anti-corrosive rust inhibitor 4.36kg is added in concrete mixer and stirs It is even, while polycarboxylic acid water reducing agent 7.38kg being uniformly mixed with the concrete mixing water of 153kg, then by water and polycarboxylic acids Type water-reducing agent mixing liquid is added in blender, is drawn off after being sufficiently stirred 2.5 minutes, and corrosion-prevention rust-resistance concrete is made.

To the fresh concrete reference GB/T50080-2002 of embodiment 1-3 and comparative example 1-3《Normal concrete mix Physical performance experimental method standard》；The compression strength of concrete is with reference to GB/T50081-2002《Normal concrete mechanical property tests Method standard》；Concrete Frozen-thawed cycled is with reference to GBJ82-85《Normal concrete long-term behaviour and endurance quality experimental method》；It is anti- Chloride diffusion coefficient is with reference to CCES01-2004《Durability design and construction guidbook》Middle NEL methods carry out performance Test, as a result as shown in table 1- tables 3.

1 fresh concrete freeze thawing of table and resisting chloride ion penetration diffusion

Note：Wherein water stability evaluates (hit real 75 times) with indirect tensile test on frozen-thaw.

2 fresh concrete erosion-resisting characteristics of table

Note：Sulfate attack coefficient ratio, for by inspection agent on crack resistance of concrete sulfate coefficient (90 times)/normal concrete sulfate resistance coefficient (90 times) × 100%.

The 3 fresh concrete slump of table and compression strength performance

By 3 comprehensive analysis of table 1- tables it is found that with the increase for corroding number, the compression strength of concrete reduces, and illustrates concrete The corrosion function of attack solution is received, after anti-corrosive rust inhibitor is added, coagulation coagulates the work in every performance of soil, mechanical property and obtains Improve to different degrees of, slump-loss, air content are less than concrete made from comparative example 1-3, illustrate that the anti-corrosive rust inhibitor has There is certain guarantor's plasticity energy, with the extension of curing age, the intensity of concrete is above the compression strength of comparative example concrete, With certain diminishing component so that the volume of water-reducing agent will be low, cost-effective.The concrete incorporation present invention of embodiment 1-3 Anti-corrosive rust inhibitor, resisting erosion of sulfate coefficient is apparently higher than the concrete obtained by comparative example 1-3, and sulfate attack coefficient ratio is bright It is excellent to illustrate that the concrete of the composite anti-corrosive corrosion inhibitor of the incorporation present invention has for the aobvious limit value higher than as defined in specification 115 Corrosion-prevention rust-resistance performance.

For the freeze-thaw split intensity ratio of embodiment 1-3 60~80%, dynamic stability is more than 2400 times/mm, has preferable High temperature deformation resistance and dynamic stability, and its conventional compression strength is substantially better than comparative example 1-3 with anti-ion permeability.

Claims (10)

1. a kind of corrosion-prevention rust-resistance concrete, which is characterized in that include 248-292 parts of cement, the sand 374-453 in terms of parts by weight Part, 637-926 parts of rubble, 66-89 parts of flyash, 15-20 parts of torispherical glass powder, 78-93 parts of miberal powder, swelling agent 1.55- 4.78 parts, 5-8 parts of the rust inhibitor, 2.46-5.38 parts of water-reducing agent, 10-15 parts of glass fibre, 1-5 parts of binder, water 150- 210 parts.

2. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the rust inhibitor is by with weight 10-15 parts of 5-10 parts of 15-20 parts of pentalyn, sodium potassium tartrate tetrahydrate, Ethylenediaminetetraacetic Acid Calcium Salt salt, the heteroauxin 1-3 of number meter Part, 0.5-2.5 parts of zirconium silicate, N- [2- (2- hydroxyl-oxethyls) -4- nitrobenzophenones] 2-3 parts of ethanol amine, N, N- dimethyl -2- 30-50 parts of 4-6 parts of (two benzyloxies) ethamine and water are mixed evenly and obtain.

3. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the binder is by following methods system It is standby and obtain：By methyl methacrylate, brominated epoxy resin, DL- syringaresinols, nano-carbon powder, silicic acid at 120-130 DEG C Sodium is added in vegetable oil after mixing, after being stirred and heated to 150-160 DEG C, under conditions of pressure is 2.0-2.5Mpa, 2-4 hours are kept the temperature to get the binder；In terms of weight fraction, 20-60 parts of methyl methacrylate, brominated epoxy resin 10- 20 parts, 10-30 parts of DL- syringaresinols, 5-10 parts of sodium metasilicate, 5-10 parts of nano-carbon powder, 20-50 parts of vegetable oil.

4. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the miberal powder is S105 grades of Blast Furnace Ores Ground-slag, specific surface area 525cm²/ g, fluidity ratio are 106%, and specific activity index 7d is 95%, 28d 115%.

5. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the flyash is global shape, Grain size is continuously distributed and grain size≤3 μm, water demand ratio are not more than 95%.

6. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the swelling agent is two formyl of azo Amine plastic expansion agent.

7. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the cement is P.O42.5 grades general Logical portland cement.

8. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the sand includes that weight ratio is 7:3 10-30 mesh sand and 50-100 mesh sand, the sand be washing drying river sand.

9. a kind of corrosion-prevention rust-resistance concrete according to claim 1, which is characterized in that the rubble includes that mass ratio is 3: The mould degree of counting accurately of the rubble that the rubble and particle size range that 7 particle size range is 0-5mm are 6-20mm, rubble is 1.5.

10. according to a kind of preparation method of corrosion-prevention rust-resistance concrete of claim 1-9 any one of them, which is characterized in that according to It is secondary to add cement, sand, rubble, flyash, miberal powder, torispherical glass powder, swelling agent, the rust inhibitor, glass fibre, binder Enter and stirred evenly into concrete mixer, while water-reducing agent being added in concrete mixing water and is uniformly mixed, then will Water and water-reducing agent mixing liquid are added in blender, are drawn off after being sufficiently stirred 2-3 minutes, and a kind of corrosion-prevention rust-resistance coagulation is made Soil.