CN104692733B - Concrete and its preparation method is partly buried for saline soil area - Google Patents
Concrete and its preparation method is partly buried for saline soil area Download PDFInfo
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Abstract
Concrete and its preparation method is partly buried for saline soil area, by cement 10 ~ 24%, gather materials 55 ~ 80%, nano-mineral adulterant 1 ~ 2%, polymeric additive 2 ~ 5%, auxiliary agent 0.1 ~ 0.5%, nano modifier 0.2 ~ 0.5%, hydrated barta microcapsule powder 2 ~ 5% and water 7 ~ 8% forms, the coarse aggregate that to gather materials by particle diameter be 200 object fine aggregates and 5 ~ 20mm forms, wherein, particle diameter is that the per-cent that the weight of 5 ~ 20mm coarse aggregate accounts for gross weight of gathering materials is greater than 43%. Above-mentioned raw materials, when preparing concrete, is placed in forced mixer in batches and is uniformly mixed, ensure that concrete homogeneity by the present invention; Present invention utilizes polymkeric substance and lightweight nano material, pavement performance is good, both can improve the ability of concrete anti-sulphates corrosive, the corrosion of anti-bittern, concrete frost resistance can have been improved again, significant for the development of saline soil area economy and Road transport.
Description
Technical field
The present invention relates to road engineering and use field of material technology, be specifically related to a kind of partly bury concrete and its preparation method for saline soil area.
Background technology
Saline soil is widely distributed in China, but containing sulfate radical and chlorion in saline soil, easily there is the products such as reaction generation ettringite, gypsum and thaumasite with cement-hydrate in sulfate ion, the expansion that concrete produces because of these product crystallizations is pressed and occur cracking and destruction to wait degradation phenomena, particularly vitriol and villaumite are big to road, bridge and affiliated facility corrodibility thereof, seriously have impact on concrete weather resistance and security, be especially partly embedded in saline soil or the concrete destruction that is partly soaked in bittern the most serious. Therefore, the pavement material that urgently a kind of erosion resistance is strong is dealt with corrodibility and is destroyed.
Summary of the invention
It is an object of the invention to provide a kind of sulfate resistance for saline soil area and bittern corrosion partly bury concrete and its preparation method, utilize polymkeric substance and the acting in conjunction of lightweight nano material, define pore structure closely knit, that be not connected, corrosion-resistant, shock-resistant.
The technical scheme that the present invention adopts for achieving the above object is: partly bury concrete for saline soil area, by cement, gather materials, nano-mineral adulterant, polymeric additive, auxiliary agent, nano modifier, hydrated barta microcapsule powder and water composition, the weight percentage of each component is followed successively by: cement 10 ~ 24%, gather materials 55 ~ 80%, nano-mineral adulterant 1 ~ 2%, polymeric additive 2 ~ 5%, auxiliary agent 0.1 ~ 0.5%, nano modifier 0.2 ~ 0.5%, hydrated barta microcapsule powder 2 ~ 5% and water 7 ~ 8%, the described coarse aggregate that to gather materials by particle diameter be 200 object fine aggregates and 5 ~ 20mm forms, wherein, particle diameter is that the per-cent that the weight of 5 ~ 20mm coarse aggregate accounts for gross weight of gathering materials is greater than 43%.
Further, the coarse aggregate of 5 ~ 20mm grain size category is divided into again 5 ~ 10mm and 10 ~ 20mm, two kinds of grades, and the weight ratio of 5 ~ 10mm, 10 ~ 20mm and 200 order three kinds of granularities is 10 ~ 15:25 ~ 35:20 ~ 30.
In the present invention, described nano-mineral adulterant is the mixture of one or more in calcining coal gangue powder, flyash, silicon ash, slag, red mud mine tailing powder, non-ferrous metal slag, slag; Described polymeric additive is the mixture of one or more in thermosetting resin, tar modified resin, vinyl-type monomer;
In the present invention, described auxiliary agent is made up of stablizer, water repellent agent, setting accelerator and defoamer, and wherein, the per-cent that each composition weight accounts for auxiliary agent gross weight is followed successively by stablizer 20 ~ 30%, water repellent agent 20 ~ 30%, setting accelerator 20 ~ 30% and defoamer 20 ~ 30%. Described stablizer is OP type emulsifying agent, dye leveller 102 or agriculture breast 600; Described defoamer is 2-Ethyl Hexanol, glycerin fatty acid ester, tributyl phosphate or silicone oil; Described nano modifier is Nano-meter CaCO33, Nano-meter SiO_22, nano-TiO2, nanometer Fe2O3, nanometer Al2O3In the mixture of one or more.
Concrete preparation method is partly buried for saline soil area, comprise the following steps: step one, take microcapsule powder, hydrated barta powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20 ~ 25min of 40 ~ 50KHz after mixing, then it is carry out taking out filter under the vacuum condition of 0.098MPa in vacuum tightness, stop when no longer including ethanol drips taking out filter, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C �� 6h and the preheating of 50 DEG C �� 20min successively, take out the material after preheating and be placed in pressing machine under 2MPa pressure precompressed 5min, and then under 5MPa, 150 �� 5 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained hydrated barta microcapsule powder, for subsequent use;
Step 3, according to described weight percentage, take cement respectively, gather materials, hydrated barta microcapsule powder that nano-mineral adulterant, polymeric additive, auxiliary agent, nano modifier, water and step 2 are obtained, for subsequent use;
Step 4, by cement, gather materials and nano-mineral adulterant is poured in forced mixer, then add in stirrer alleged water intaking weight in step 3 70 ~ 80% water, stir 30s, obtained mix A, for subsequent use;
Step 5, in mix A, add polymeric additive, stir 30s, then add auxiliary agent, stir 30s, obtained mixture B, for subsequent use;
Step 6, in mixture B, add nano modifier and hydrated barta microcapsule powder that step 2 is obtained, then remaining water is added, and stir 90s and obtain concrete.
In the present invention, the granularity of cement is micron level, and the hydrated product of cement taking nano-mineral adulterant as nucleus, can form the hydrated product gel phase of cement on nano-mineral adulterant surface, reticulated structure it is incorporated into, it is to increase concrete endurance quality between gel phase. Simultaneously, micron order cement is introduced nano modifier and carries out compound, nano-mineral adulterant and nano modifier can also fill size effectively in the micropore of 10 ~ 100nm, improve the brilliant glue ratio in cement, reduce the creeping property of cement, concrete resistance to compression, tension and flexural strength can be made greatly to improve.
The concrete that the present invention obtains, when the sulfate ion in salt marsh soil invades in concrete, on concrete, the crackle of expansion can make hydrated barta microcapsule powder break, hydrated barta and sulfate ion reaction, absorb the sulfate ion in concrete, reduce sulfate ion concentration in concrete; Meanwhile, the barium sulfate precipitate of generation can fill concrete hole and crack, stop the further corrosion of vitriol, it is to increase the ability of Concrete sulfate corrosion-resistant.
The useful effect of the present invention: (1), the present invention using nano material as additive be spiked in concrete formed nanometer concrete, stop moisture infiltration, enhance corrosion resistance; Meanwhile, polymkeric substance mix the aquation and condensation that cause cement, improve the workability of sand-cement slurry or cement concrete, reduce water cement ratio, enhance degree of compactness.
(2) the nano-mineral adulterant, adopted and the acting in conjunction of nano modifier, the space being possible not only in filling concrete, improve concrete mobility, concrete defines pore structure closely knit, that be not connected, cement and the interface structure gathered materials in concrete can also be improved, concrete intensity, impermeability and antiseptic power are all improved.
(3), the present invention when preparing concrete, stir sufficient, ensure that concrete homogeneity, it is ensured that the corrosion-resistant concrete performance that partly buries for saline soil area is stablized, and effectively ensures its pavement performance; Technological operation is easy, save the time, it is to increase efficiency. Make use of polymkeric substance and lightweight nano material, pavement performance is good, both the ability of concrete anti-sulphates corrosive, the corrosion of anti-bittern can have been improved, concrete frost resistance can be improved again, and concrete hole is few, closely knit, durable, wear-resisting, corrosion-resistant, shock-resistant, significant for the development of saline soil area economy and Road transport.
Embodiment
Below in conjunction with specific embodiment to the present invention for saline soil area partly bury concrete and its preparation method is described further, so that the technician of this area can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention.
Concrete is partly buried for saline soil area, by cement, gather materials (i.e. river sand), nano-mineral adulterant, polymeric additive, auxiliary agent, nano modifier, hydrated barta microcapsule powder and water composition, the weight percentage of each component is followed successively by: cement 10 ~ 24%, gather materials 55 ~ 80%, nano-mineral adulterant 1 ~ 2%, polymeric additive 2 ~ 5%, auxiliary agent 0.1 ~ 0.5%, nano modifier 0.2 ~ 0.5%, hydrated barta microcapsule powder 2 ~ 5% and water 7 ~ 8%, the described coarse aggregate that to gather materials by particle diameter be 200 object fine aggregates and 5 ~ 20mm forms, wherein, particle diameter is that the per-cent that the weight of 5 ~ 20mm coarse aggregate accounts for gross weight of gathering materials is greater than 43%. further, the coarse aggregate of 5 ~ 20mm grain size category is divided into again 5 ~ 10mm and 10 ~ 20mm, two kinds of grades, and the weight ratio of 5 ~ 10mm, 10 ~ 20mm and 200 order three kinds of granularities is 10 ~ 15:25 ~ 35:20 ~ 30.
Wherein, polymeric additive is the mixture of one or more in thermosetting resin, tar modified resin, vinyl-type monomer. Thermosetting resin is one or several the mixture in unsaturated polyester resin, epoxy resin, urethane, resol; Tar modified resin is tar epoxy and/or tar urethanum; Vinyl-type monomer is methyl-prop ethene formic acid and/or glycerine methyl methacrylate-vinylbenzene.
Embodiment 1
Concrete preparation method is partly buried for saline soil area, comprise the following steps: step one, take microcapsule powder, hydrated barta powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20min of 45KHz after mixing, then it is carry out taking out filter under the vacuum condition of 0.098MPa in vacuum tightness, stop when no longer including ethanol drips taking out filter, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C �� 6h and the preheating of 50 DEG C �� 20min successively, take out the material after preheating and be placed in pressing machine under 2MPa pressure precompressed 5min, and then under 5MPa, 155 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained hydrated barta microcapsule powder, for subsequent use;
Step 3, according to weight percentage, take the cement of 12% respectively, the particle diameter of 25% is that 200 objects are gathered materials, the particle diameter of 13% is 5 ~ 10mm gathers materials, the particle diameter of 30% is 10 ~ 20mm gathers materials, the nano flyash of 2%, 5% resol, the auxiliary agent of 0.3%, the nano-TiO of 0.2%2And Nano-meter SiO_22, the water of 7.5% and the obtained hydrated barta microcapsule powder of step 2 of 5%, wherein, nano-TiO2And Nano-meter SiO_22Weight ratio be 1:1; Auxiliary agent is made up of 0.09% stablizer, 0.06% water repellent agent, 0.09% setting accelerator and 0.06% defoamer, for subsequent use;
Step 4, by cement, gather materials and nano flyash is poured in forced mixer, then add in stirrer alleged water intaking weight in step 3 70% water, stir 30s, obtained mix A, for subsequent use;
Step 5, in mix A, add resol, stir 30s, then add auxiliary agent, stir 30s, obtained mixture B, for subsequent use;
Step 6, in mixture B, add nano-TiO2, Nano-meter SiO_22The hydrated barta microcapsule powder obtained with step 2, then adds remaining water, and stirs 90s and obtain concrete.
This obtained concrete of embodiment 1 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Embodiment 2
Concrete is partly buried by corrosion-resistant in the saline soil area of the present embodiment, is made up of following raw material and mass percent: the cement of 24%, the particle diameter of 20% are that 200 objects are gathered materials, the particle diameter of 10% is 5 ~ 10mm gathers materials, the particle diameter of 25% is 10 ~ 20mm gathers materials, nanometer slag of 2%, 5% tar modified resin, 0.5% auxiliary agent, the nano modifier of 0.5%, the hydrated barta microcapsule powder of 5% and 8% water. Wherein, nano modifier is the nano-TiO of 2:3 by weight ratio2With a nanometer Al2O3Composition; Concrete preparation method is such as embodiment 1.
This obtained concrete of embodiment 2 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Embodiment 3
Concrete preparation method is partly buried for saline soil area, comprise the following steps: step one, take microcapsule powder, hydrated barta powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20min of 50KHz after mixing, then it is carry out taking out filter under the vacuum condition of 0.098MPa in vacuum tightness, stop when no longer including ethanol drips taking out filter, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C �� 6h and the preheating of 50 DEG C �� 20min successively, take out the material after preheating and be placed in pressing machine under 2MPa pressure precompressed 5min, and then under 5MPa, 145 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained hydrated barta microcapsule powder, for subsequent use;
Step 3, according to weight percentage, take the cement of 10% respectively, the particle diameter of 30% is that 200 objects are gathered materials, the particle diameter of 15% is 5 ~ 10mm gathers materials, the particle diameter of 32% is 10 ~ 20mm gathers materials, the nano-silicon ash of 0.5%, 0.5% nanometer slag, 1% urethane, the resol of 1%, the auxiliary agent, 0.03% of 0.1% put into Nano-meter CaCO33, 0.12% nanometer Fe2O3, 0.05% Nano-meter SiO_22, the water of 7.7% and the obtained hydrated barta microcapsule powder of step 2 of 2%, for subsequent use;
Step 4, by cement, gather materials, nano-silicon ash and a nanometer slag pour in forced mixer, then add in stirrer weight of fetching water alleged by step 3 80% water, stir 30s, obtained mix A, for subsequent use;
Step 5, in mix A, add urethane and resol, stir 30s, then add auxiliary agent, stir 30s, obtained mixture B, for subsequent use;
Step 6, in mixture B, add Nano-meter CaCO33, nanometer Fe2O3, Nano-meter SiO_22The hydrated barta microcapsule powder obtained with step 2, then adds remaining water, and stirs 90s and obtain concrete.
This obtained concrete of embodiment 1 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
This obtained concrete of embodiment 3 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Embodiment 4
Concrete is partly buried by corrosion-resistant in the saline soil area of the present embodiment, is made up of following raw material and mass percent: the cement of 20%, the particle diameter of 20% are that 200 objects are gathered materials, the particle diameter of 11% is 5 ~ 10mm gathers materials, the particle diameter of 35% is 10 ~ 20mm gathers materials, nanometer colliery powder of 1.5%, 2.5% vinyl-type monomer, the auxiliary agent of 0.2%, the Nano-meter SiO_2 of 0.15%2, 0.15% nanometer Al2O3, the hydrated barta microcapsule powder of 2.5% and the water of 7%. Wherein, concrete preparation method is such as embodiment 3.
This obtained concrete of embodiment 4 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Embodiment 5
Concrete is partly buried by corrosion-resistant in the saline soil area of the present embodiment, is made up of following raw material and mass percent: the cement of 15%, the particle diameter of 28% are that 200 objects are gathered materials, the particle diameter of 10% is 5 ~ 10mm gathers materials, the particle diameter of 30% is 10 ~ 20mm gathers materials, nanometer red mud mine tailing powder of 1.2%, 0.3% nanometer slag, 0.5% nano flyash, 2.2% polymeric additive, the auxiliary agent of 0.3%, the Nano-meter SiO_2 of 0.5%2, the hydrated barta microcapsule powder of 4% and the water of 8%. Wherein, concrete preparation method is such as embodiment 3.
This obtained concrete of embodiment 5 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Embodiment 6
Concrete is partly buried by corrosion-resistant in the saline soil area of the present embodiment, is made up of following raw material and mass percent: the cement of 17%, the particle diameter of 23% are that 200 objects are gathered materials, the particle diameter of 10% is 5 ~ 10mm gathers materials, the particle diameter of 35% is 10 ~ 20mm gathers materials, nanometer colliery powder of 0.4%, 0.6% nanometer red mud mine tailing powder, 3.5% tar epoxy, the auxiliary agent of 0.1%, nanometer Al of 0.2%2O3, 0.2% Nano-meter CaCO33, the hydrated barta microcapsule powder of 3% and the water of 7%. Wherein, concrete preparation method is such as embodiment 3.
This obtained concrete of embodiment 6 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Comparative example 1
The concrete of comparative example 1 is normal concrete common on the market, and taking P.O35 cement as gelling material, with sand, stone is aggregate, the cement concrete that the mixing that adds water becomes.
This obtained concrete of comparative example 1 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Comparative example 2
The concrete of comparative example 2 is normal concrete common on the market, and taking P.O45 cement as gelling material, with sand, stone is aggregate, the cement concrete that the mixing that adds water becomes.
This obtained concrete of comparative example 2 is poured into the die trial that specification is 100 �� 100 �� 100mm, vibratory compaction, room temperature maintenance form removal after a day, obtained experiment test specimen.
Carry out cyclic wetting and drying test according to the method for resisting erosion of sulfate test in GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete standard ", embodiment 1 ~ 6, the obtained test specimen of comparative example 1 ~ 2 are placed on the Na that concentration is 10% respectively2SO4In the Qinghai bittern of solution and simulation two kinds of etchant solutions, corroding ion content in bittern is: Na+71g/L��Mg2+29g/L��K+12g/L��Ca2+1g/L��Cl-202g/L��SO4 2-6g/L��HCO3 -0.3g/L, whole test specimen partly soaks 16h, is then placed in the baking oven of 80 DEG C and dries 7h, takes out cooling 1h to room temperature, and this is a 24h circulation, then continues to be put into etchant solution, so repeatedly does 63 circulations. The test result of various operating mode sees the following form 1 respectively, table 2 and table 3.
Table 1 embodiment 1 ~ 6 half is immersed in the Na of 10%2SO4Test specimen experimental result in solution
Table 2 embodiment 1 ~ 6 half is immersed in the test specimen experimental result in the Qinghai aqueous salt brine of simulation
Table 3 comparative example 1 and 2 half is immersed in the Na of 10%2SO4The Qinghai aqueous salt brine experimental result of solution and simulation
Freeze-thaw cycle experiment is carried out according to the method for freezing soon in antifreezing test in GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete standard ", embodiment 1 ~ 6, the obtained test specimen of comparative example 1 ~ 2 are soaked 4d in the Qinghai bittern of simulation, during immersion, the water surface exceeds surface of test piece 2 ~ 3cm, take out the moisture that surface wiped by test specimen with wet cloth, and take the initial mass of test specimen and measure the modulus of initially moving of test specimen; Embodiment 1 ~ 6, the obtained test specimen of comparative example 1 ~ 2 are placed in-18 �� 2 DEG C after freezing 2h, being placed in 5 �� 2 DEG C of bittern again and melt 2h, a cycling time is 4h, so repeatedly, every mass loss and the relative dynamic elastic modulus of 25 cycle calculations test specimens, experimental result is in table 4 and table 5.
Experimental result after table 4 embodiment 1 ~ 6 test specimen freeze-thaw cycle
Experimental result after table 5 comparative example 1 and 2 test specimen freeze-thaw cycle
Industry CT scanning experiment, utilizes IPP computed in software to go out the area in hole in each interface, evaluates concrete internal structure further, and experimental result is in table 6.
The section holes number of the test specimen of table 6 embodiment 1 ~ 6, comparative example 1 and the area in hole
Mass loss rate and relative dynamic elastic modulus in contrast table 1, table 2, table 3 can be found out, the present invention is used for the corrosion-resistant of saline soil area and partly buries concrete, as compared to P.O35 with the P.O45 concrete of comparative example 1 with 2, mass loss rate reduces, relative dynamic elastic modulus increases, and illustrates that the present invention is higher for the corrosion resistance nature of saline soil area; Contrast table 4, table 5 experimental result can find out that the present invention strengthens for the corrosion-resistant concrete antifreezing performance of partly burying of saline soil area; The present invention compares the reduction of P.O35 and P.O45 concrete section hole area for the corrosion-resistant concrete that partly buries of saline soil area as can be seen from Table 6, its closely knit enhancing is described, this is due to nano-mineral adulterant and hydrated cementitious product crystal generation secondary reaction of hydration, generate sheet CSH gel, can be filled between the hole of inside concrete, it is to increase concrete degree of compactness; In addition, hydrated barta microcapsule powder mates with cement and has micro-powder filling effect, can improve concrete degree of compactness. Knowing by table 6, the present invention is used for the corrosion-resistant concrete strength that partly buries of saline soil area higher than normal concrete.
Claims (5)
1. partly bury concrete for saline soil area, it is characterised in that: by cement, gather materials, nano-mineral adulterant, polymeric additive, auxiliary agent, nano modifier, hydrated barta microcapsule powder and water composition, the weight percentage of each component is followed successively by: cement 10 ~ 24%, gather materials 55 ~ 80%, nano-mineral adulterant 1 ~ 2%, polymeric additive 2 ~ 5%, auxiliary agent 0.1 ~ 0.5%, nano modifier 0.2 ~ 0.5%, hydrated barta microcapsule powder 2 ~ 5% and water 7 ~ 8%, the weight percentage sum of described each component is 100%, the described coarse aggregate that to gather materials by particle diameter be 200 object fine aggregates and 5 ~ 20mm forms, wherein, particle diameter is that the per-cent that the weight of 5 ~ 20mm coarse aggregate accounts for gross weight of gathering materials is greater than 43%, and described polymeric additive is thermosetting resin, the mixture of one or more in tar modified resin, described auxiliary agent is by stablizer, water repellent agent, setting accelerator and defoamer composition, wherein, the per-cent that each composition weight accounts for auxiliary agent gross weight is followed successively by stablizer 20 ~ 30%, water repellent agent 20 ~ 30%, setting accelerator 20 ~ 30% and defoamer 20 ~ 30%, described nano modifier is Nano-meter CaCO33, Nano-meter SiO_22, nano-TiO2, nanometer Fe2O3, nanometer Al2O3In the mixture of one or more.
2. according to claim 1 partly bury concrete for saline soil area, it is characterized in that: the coarse aggregate of described 5 ~ 20mm grain size category is divided into again 5 ~ 10mm and 10 ~ 20mm, two kinds of grades, and the weight ratio of 5 ~ 10mm, 10 ~ 20mm and 200 order three kinds of granularities is 10 ~ 15:25 ~ 35:20 ~ 30.
3. according to claim 1 partly bury concrete for saline soil area, it is characterised in that: described nano-mineral adulterant is the mixture of one or more in calcining coal gangue powder, flyash, silicon ash, slag, red mud mine tailing powder, non-ferrous metal slag, slag.
4. according to claim 1 partly bury concrete for saline soil area, it is characterised in that: described stablizer is OP type emulsifying agent, dye leveller 102 or agriculture breast 600; Described defoamer is 2-Ethyl Hexanol, glycerin fatty acid ester, tributyl phosphate or silicone oil.
5. as claimed in claim 1 partly burying concrete preparation method for saline soil area, its characteristic is, comprises the following steps:
Step one, take microcapsule powder, hydrated barta powder and dehydrated alcohol according to the weight ratio of 1:3:3, at the ultrasonic frequency ultrasonic disperse 20 ~ 25min of 40 ~ 50KHz after mixing, then it is carry out taking out filter under the vacuum condition of 0.098MPa in vacuum tightness, stop when no longer including ethanol drips taking out filter, take out much filtrate, for subsequent use;
Step 2, much filtrate obtained for step one is placed in baking oven, carry out the oven dry of 30 DEG C �� 6h and the preheating of 50 DEG C �� 20min successively, take out the material after preheating and be placed in pressing machine under 2MPa pressure precompressed 5min, and then under 5MPa, 150 �� 5 DEG C of conditions hot pressing 30min, after naturally cooling to room temperature, obtained hydrated barta microcapsule powder, for subsequent use;
Step 3, according to described weight percentage, take cement respectively, gather materials, hydrated barta microcapsule powder that nano-mineral adulterant, polymeric additive, auxiliary agent, nano modifier, water and step 2 are obtained, for subsequent use;
Step 4, by cement, gather materials and nano-mineral adulterant is poured in forced mixer, then add in stirrer alleged water intaking weight in step 3 70 ~ 80% water, stir 30s, obtained mix A, for subsequent use;
Step 5, in mix A, add polymeric additive, stir 30s, then add auxiliary agent, stir 30s, obtained mixture B, for subsequent use;
Step 6, in mixture B, add nano modifier and hydrated barta microcapsule powder that step 2 is obtained, then remaining water is added, and stir 90s and obtain concrete.
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| CN110698147A (en) * | 2019-09-03 | 2020-01-17 | 中国能源建设集团甘肃省电力设计院有限公司 | Cement-based repairing material suitable for saline soil environment and preparation method thereof |
| CN112279531A (en) * | 2020-10-30 | 2021-01-29 | 熊小海 | Concrete preparation process |
| CN114292082B (en) * | 2021-12-17 | 2022-09-23 | 山东高速集团有限公司 | Red mud-based stable material for roads and preparation method and application thereof |
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| CN103265248B (en) * | 2013-05-17 | 2015-05-13 | 江苏科技大学 | Soil engineering filler mainly prepared from industrial waste, and preparation method and application thereof |
| CN103420656A (en) * | 2013-08-06 | 2013-12-04 | 昆明理工大学 | Self compact concrete |
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