CN105236854A - Concrete having performance of resisting invasion of sulfates and chlorides and concrete member - Google Patents
Concrete having performance of resisting invasion of sulfates and chlorides and concrete member Download PDFInfo
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- CN105236854A CN105236854A CN201510561891.2A CN201510561891A CN105236854A CN 105236854 A CN105236854 A CN 105236854A CN 201510561891 A CN201510561891 A CN 201510561891A CN 105236854 A CN105236854 A CN 105236854A
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- anticorrodent
- slag
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Abstract
The invention discloses concrete having the performance of resisting invasion of sulfates and chlorides and a concrete member. The concrete includes the following components: 368-453 kg/m<3> of a cementing material, 621-677 kg/m<3> of sand, 1142-1201 kg/m<3> of stone, 143-149 kg/m<3> of water, 1.2-1.8% of a water reducer, 0.01-0.02% of an air entraining agent and 0-8.4% of an corrosion resistant agent, wherein the percentage ratio refers to the mass ratio of the water reducer, the air entraining agent and the corrosion resistant agent to the cementing material, and the cementing material includes at least one of cement, mineral slag and fly ash and the corrosion resistant agent. The concrete is reasonable in proportion, is strong in the performance of resisting sulfates and chlorides, is reduced in blending difficulty, is high in quality controllability and is reduced in cost.
Description
Technical field
The present invention relates to buildings or concrete member, such as pile tube, specifically the concrete of a kind of sulfate resistance and chlorine salt corrosion and concrete member.
Background technology
In salty area, such as coastal and Salt Lake Area, containing abundant vitriol and villaumite in soil, vitriol and villaumite understand the reinforcing bar in corrosion concrete and concrete, affect its weather resistance.
At present, high-strength pipe pile is applied more in engineering foundation basis, consider the corrosive nature of saline-alkali environment, current specifications does not allow to adopt open-end pipe pile under strong corrosive environment, pile tip with closed opening should be adopted, and determine whether that the measure taking elongated filling core improves Corrosion Protection according to corrosion class, but the measure of elongated filling core adds pile tube pile foundation working procedure, sometimes also there is construction quality problem.
Existing anti-corrosion concrete has multiple, and mainly through increasing multiple anticorrosive additive, or increase amount of gel realizes, and raw material is more, and quality control is more difficult, the unstable properties of product, and the cost of existing scheme is also corresponding higher.
Summary of the invention
Goal of the invention a: object is to provide a kind of concrete with sulfate resistance and precenting chlorate corrosion performance, to solve the problems referred to above that prior art exists.Further object is to provide a kind of concrete member adopting above-mentioned concrete for making.
Technical scheme: a kind of concrete with sulfate resistance and precenting chlorate corrosion performance, comprises following each component:
Glue material 368 ~ 453kg/m
3, sand 621 ~ 677kg/m
3, stone 1142 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%;
Wherein, above-mentioned per-cent refers to the mass ratio of water reducer, air entrapment agent or anticorrodent and glue material; Described glue material comprises cement, at least one in slag or flyash, and anticorrodent.
Further, described water reducer comprises aliphatic water reducing agent, polycarboxylate water-reducer and naphthalene water reducer.
Further, described air entrapment agent is HK-F2.
Further, described anticorrodent is made up of the calcium sulfate of 45-55 weight part, the sodium aluminate of 10-15 weight part and the calcium oxide of 12-18 weight part, the calcium aluminate of 20-30 weight part.
Further, described in there is the concrete of sulfate resistance and precenting chlorate corrosion performance, comprise following each component:
Cement 276-385kg/m
3, flyash 68-101kg/m
3, sand 643 ~ 677kg/m
3, stone 1142 ~ 1201kg/m
3, water 145 ~ 147kg/m
3, water reducer 1.2 ~ 1.3%, and air entrapment agent 0.01 ~ 0.02%.
Further, described in there is the concrete of sulfate resistance and precenting chlorate corrosion performance, comprise following each component:
Glue material 373 ~ 442kg/m
3, sand 621 ~ 677kg/m
3, stone 1188 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%; Wherein, in glue material, the consumption of cement is 224-365kg/m
3, the total amount of flyash, slag and anticorrodent is the 40wt%-40.4wt% of glue material total amount.
In the above-described embodiments, the quality of described flyash is 10% of glue material amount, and the quality of slag is 30% of glue material amount; Or the quality of described slag is the 40%-40.4% of glue material amount; Or the quality of flyash is 10% of glue material amount, slag quality is 22% of glue material amount, and anticorrodent is 8% of glue material amount.
Further, described in there is the concrete of sulfate resistance and precenting chlorate corrosion performance, comprise following each component:
Glue material 400 ~ 442kg/m
3, sand 621 ~ 668kg/m
3, stone 1188 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%; Wherein, in glue material, the consumption of cement is 224-365kg/m
3, the total amount of flyash, slag and anticorrodent is the 40wt%-40.4wt% of glue material total amount.
In the above-described embodiments, the quality of described flyash is 10% of glue material amount, and the quality of slag is 30% of glue material amount; Or the quality of described slag is the 40%-40.4% of glue material amount; Or the quality of flyash is 10% of glue material amount, slag quality is 22% of glue material amount, and anticorrodent is 8% of glue material amount.
In above-mentioned any embodiment, the physicals of each raw material and chemical composition are:
The chemical composition of cement is (wt%): SiO
221.55, CaO60.58, MgO1.23, Fe
2o
33.12, Al
2o
35.85, SO
32.55, K
2o0.45, Na
2o0.16, alkali content 0.48, loss on ignition 4.65.
The physical and mechanical property of cement is as follows:
Experiment is used: consumptive use of water normal consistence 27.1wt%, ultimate compression strength (MPa) 30.5/3d, 61.8/28d, folding strength (MPa) 5.9/3d, 9.5/28d, time of coagulation (h:min) 2:25,3:30, stability is qualified, density 3.14g/cm
3.
Minimum requirements: ultimate compression strength (MPa) is not less than 23/3d, is not less than 52.5/28d, folding strength (MPa) is not less than 4/3d, 7/28d, and time of coagulation (h:min) >=0:45 ,≤10:00, stability is qualified.
The chemical composition of flyash is (wt%):
SiO
255.94、CaO1.53、MgO0.68、Fe
2O
33.16、Al
2O
333.38、SO
30.17、K
2O0.69、Na
2O0.46。
The quality parameter of flyash is:
Fertilizer index: water ratio 0.2wt%, density 2.31g/cm
3, fineness 10.8%, water demand ratio 96%, loss on ignition 1.6%, activity index 75.0%.
Minimum index: water ratio≤1.0wt%, is less than or equal to fineness 25.0%, water demand ratio≤105%, loss on ignition≤8.0%, activity index >=70.0%.
The chemical composition following (wt%) of slag:
SiO
235.40, CaO41.19, MgO3.76, Fe
2o
31.37, Al
2o
313.18, SO
31.65, K
2o0.59, Na
2o0.20, alkali content 0.59.
The quality parameter of slag is as follows:
Fertilizer index: density 2.88g/cm
3, specific surface area 428m
2/ kg, degree of mobilization than 97wt%, water content 0.1wt%, SO
31.65wt%, Cl
-0.01%, loss on ignition 0.8%, activity index 7d92%, 28d106%.
Minimum index: density>=2.80g/cm
3, specific surface area>=400m
2/ kg, degree of mobilization ratio>=95wt%, water content≤1.0wt% ,≤SO
34.0wt% ,≤Cl
-0.06%, loss on ignition≤3.0%, activity index>=7d75%,>=28d95%
Sand is river sand, and its physicals is as follows:
Fineness modulus 2.8, apparent density 2640kg/m
3, face dry density 2610kg/m
3, the dry water-intake rate 0.7% in face.
Stone is coarse aggregate, and adopt continuous grading, the particle diameter of rubble is 5-31.5mm, and main performance index is as follows:
Fertilizer index: apparent density 2660kg/m
3, face dry density 2630kg/m
3, the dry water-intake rate 0.75% in face, elongated particles 2wt%, silt content 0.22wt%, crush index 8.5%.
Minimum index: apparent density>=2600kg/m
3, dry water-intake rate≤1.0% in face, elongated particles≤5wt%, silt content≤0.5wt%, crush index≤10%.
The performance index of admixture are as follows:
The fertilizer index of water reducer: water-reducing rate (%) 18, bleeding rate ratio (%) 10, shrinkage ratio (%) 112, air content (%) 2.0, time of coagulation poor (min) initial set+30, final set-10, compressive strength rate (%) 145/3d, 138/7d, 131/28d.
The minimum index of water reducer: water-reducing rate (%) >=14, bleeding rate ratio (%)≤90, shrinkage ratio (%)≤135, air content (%)≤3.0, time of coagulation poor (min)-90 ~+120, compressive strength rate (%) >=130/3d, 125/7d, 120/28d.
The fertilizer index of air entrapment agent HK-F2: water-reducing rate (%) 6.5, bleeding rate ratio (%) 58, shrinkage ratio (%) 124, air content (%) 4.6, time of coagulation poor (min) initial set+25, final set+10, compressive strength rate (%) 96/3d, 97/7d, 91/28d.
The minimum index of air entrapment agent HK-F2: water-reducing rate (%) >=6, bleeding rate ratio (%)≤70, shrinkage ratio (%)≤135, air content (%)≤3.0, time of coagulation poor (min)-90 ~+120, compressive strength rate (%) >=95/3d, 95/7d, 90/28d.
The quality parameter of anticorrodent is as follows:
Fineness (45mm tails over)≤12wt%, water content 1.0wt%, loss on ignition≤8.0wt%, 28d activity index >=75%.
A kind of concrete member, comprises the concrete with sulfate resistance and precenting chlorate corrosion performance described in above-mentioned either a program.
Described such scheme of the present invention, has following beneficial effect: reasonable ratio, and the ability of sulfate resistance and villaumite is strong, and relevant experimental data further describes in an embodiment; Reduce the difficulty of batching, quality controllability is high, reduces cost simultaneously.
Embodiment
Below by embodiment 1 and experimental data, ins and outs of the present invention are described.
Each raw material meets the requirement of summary of the invention part.Control group is normal concrete, and its composition is:
Control group 1: cement 380kg/m
3, sand 678kg/m
3, stone 1203kg/m
3, water 147kg/m
3, water reducer 1.2%, air entrapment agent 0.08 ‰.(% or ‰ refers to the mass ratio of this material and glue material, lower same)
In each embodiment herein, under ultimate compression strength refers to normal curing, the observed value of 28d.Tensile strength refers to 28d tensile strength.The average infiltration height of test specimen when infiltration height is pressurized to setting pressure 1.3MPa step by step to seepage pressure.Anti-freezing property parameter refers to mass loss rate % during freeze thawing 250 times.The ultimate compression strength corrosion resistance index % that resisting erosion of sulfate parameter is cycle index when being 120 times.Anti-Chloride Ion Penetration is the chloride diffusion coefficient (RCM method) × 10 of 28d under normal curing
-12m
2/ s and displacement flux C(normal curing, 28d).
Experimental data is as follows: ultimate compression strength is: 45.3MPa.Tensile strength is 2.98MPa.Infiltration is highly 22mm.Anti-freezing property parameter is 0.21%, and Sulphate-resistant property parameter is 70%, and anti-villaumite performance perameter is 5.66 and 1179.
Control group 2: cement 342kg/m
3, sand 707kg/m
3, stone 1202kg/m
3, water 147kg/m
3, water reducer 1.2%, air entrapment agent 0.08 ‰.
Experimental data is as follows: ultimate compression strength is: 46.2MPa.Tensile strength is 3.15MPa.Anti-permeability performance parameter is 10mm, and anti-freezing property parameter is 0.16%, and Sulphate-resistant property parameter is 74%, and anti-villaumite performance perameter is 5.15.
First group of embodiment, each component is as follows:
Embodiment 1a
Cement 275kg/m
3, flyash 92kg/m
3, sand 678kg/m
3, stone 1203kg/m
3, water 147kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 42.8MPa, and tensile strength is 3.25MPa, and anti-permeability performance parameter is 40mm, and anti-freezing property parameter is 0.52%, and Sulphate-resistant property parameter is 79%, and anti-villaumite performance perameter is 4.20 and 877.
Embodiment 1b
Cement 321kg/m
3, flyash 82kg/m
3, sand 675kg/m
3, stone 1152kg/m
3, water 145kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 46.5MPa, and tensile strength is 3.42MPa, and anti-permeability performance parameter is 45mm, and anti-freezing property parameter is 2.35%, and Sulphate-resistant property parameter is 81%, and anti-villaumite performance perameter is 3.52 and 744.
Embodiment 1c
Cement 384kg/m
3, flyash 67kg/m
3, sand 643kg/m
3, stone 1140kg/m
3, water 145kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 37.2MPa, and tensile strength is 2.84MPa, and anti-permeability performance parameter is 35mm, and anti-freezing property parameter is 1.86%, and Sulphate-resistant property parameter is 80%, and anti-villaumite performance perameter is 3.57 and 787.
Embodiment 1d
Cement 305kg/m
3, flyash 101kg/m
3, sand 645kg/m
3, stone 1200kg/m
3, water 145kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 43.2MPa, and tensile strength is 3.01MPa, and anti-permeability performance parameter is 50mm, and anti-freezing property parameter is 0.92%, and Sulphate-resistant property parameter is 82%, and anti-villaumite performance perameter is 3.12 and 740.
Embodiment 1e
Cement 324kg/m
3, flyash 81kg/m
3, sand 677kg/m
3, stone 1152kg/m
3, water 145kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 56.8MPa, and tensile strength is 3.65MPa, and anti-permeability performance parameter is 41mm, and anti-freezing property parameter is 2.14%, and Sulphate-resistant property parameter is 85%, and anti-villaumite performance perameter is 2.34 and 591.
Embodiment 1f
Cement 388kg/m
3, flyash 65kg/m
3, sand 643kg/m
3, stone 1140kg/m
3, water 145kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 48.5MPa, and tensile strength is 3.43MPa, and anti-permeability performance parameter is 42mm, and anti-freezing property parameter is 2.85%, and Sulphate-resistant property parameter is 83%, and anti-villaumite performance perameter is 2.41 and 610.
Second group of embodiment, each component is as follows:
Embodiment 2a
Cement 249kg/m
3, slag 167kg/m
3, sand 647kg/m
3, stone 1200kg/m
3, water 149kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 48.1MPa, and tensile strength is 3.36MPa, and anti-permeability performance parameter is 33mm, and anti-freezing property parameter is 1.85%, and Sulphate-resistant property parameter is 85%, and anti-villaumite performance perameter is 2.51 and 618.
Embodiment 2b
Cement 266kg/m
3, flyash 45kg/m
3, slag 134kg/m
3, sand 323kg/m
3, stone 1201kg/m
3, water 146kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 48.9MPa, and tensile strength is 3.16MPa, and anti-permeability performance parameter is 7mm, and anti-freezing property parameter is 2.05%, and Sulphate-resistant property parameter is 84%, and anti-villaumite performance perameter is 2.61 and 649.
Embodiment 2c
Cement 261kg/m
3, flyash 45kg/m
3, slag 95kg/m
3, anticorrodent 35kg/m
3, sand 639kg/m
3, stone 1188kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 61.5MPa, and tensile strength is 4.35MPa, and anti-permeability performance parameter is 6mm, and anti-freezing property parameter is 1.05%, and Sulphate-resistant property parameter is 92%, and anti-villaumite performance perameter is 1.63 and 434.
Embodiment 2d
Cement 225kg/m
3, flyash 38kg/m
3, slag 111kg/m
3, sand 678kg/m
3, stone 1201kg/m
3, water 149kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 52.5MPa, and tensile strength is 3.65MPa, and anti-permeability performance parameter is 7mm, and anti-freezing property parameter is 1.25%, and Sulphate-resistant property parameter is 86%, and anti-villaumite performance perameter is 2.24 and 523.
Embodiment 2e
Cement 249kg/m
3, slag 167kg/m
3, sand 648kg/m
3, stone 1200, water 149, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 52.8MPa, and tensile strength is 3.95MPa, and anti-permeability performance parameter is 27mm, and anti-freezing property parameter is 1.05%, and Sulphate-resistant property parameter is 90%, and anti-villaumite performance perameter is 1.98 and 486.
Embodiment 2f
Cement 263kg/m
3, flyash 45kg/m
3, slag 96kg/m
3, anticorrodent 34kg/m
3, sand 639kg/m
3, stone 1189kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 60.5MPa, and tensile strength is 4.35MPa, and anti-permeability performance parameter is 6mm, and anti-freezing property parameter is 1.01%, and Sulphate-resistant property parameter is 94%, and anti-villaumite performance perameter is 1.64 and 339.
Embodiment 2g
Cement 246kg/m
3, flyash 42kg/m
3, slag 125kg/m
3, sand 650kg/m
3, stone 1200kg/m
3, water 147kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 53.5MPa, and tensile strength is 3.55MPa, and anti-permeability performance parameter is 15mm, and anti-freezing property parameter is 1.35%, and Sulphate-resistant property parameter is 86%, and anti-villaumite performance perameter is 2.23 and 524.
Embodiment 2h
Cement 249kg/m
3, slag 168kg/m
3, sand 648kg/m
3, stone 1200kg/m
3, water 149kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 48.2MPa, and tensile strength is 3.75MPa, and anti-permeability performance parameter is 22mm, and anti-freezing property parameter is 1.55%, and Sulphate-resistant property parameter is 90%, and anti-villaumite performance perameter is 1.56 and 476.
Embodiment 2i
Cement 263kg/m
3, flyash 45kg/m
3, slag 96kg/m
3, anticorrodent 36kg/m
3, sand 639kg/m
3, stone 1189kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 61.6MPa, and tensile strength is 4.35MPa, and anti-permeability performance parameter is 9mm, and anti-freezing property parameter is 1.05%, and Sulphate-resistant property parameter is 94%, and anti-villaumite performance perameter is 1.26 and 375.
Embodiment 2j
Cement 248kg/m
3, slag 167kg/m
3, sand 645kg/m
3, stone 1202kg/m
3, water 149kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 48.5MPa, and tensile strength is 3.75MPa, and anti-permeability performance parameter is 18mm, and anti-freezing property parameter is 1.65%, and Sulphate-resistant property parameter is 92%, and anti-villaumite performance perameter is 1.46 and 475.
Embodiment 2k
Cement 268kg/m
3, flyash 43kg/m
3, slag 135kg/m
3, sand 622kg/m
3, stone 1201kg/m
3, water 146kg/m
3, water reducer 1.2% air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 53.2MPa, and tensile strength is 3.83MPa, and anti-permeability performance parameter is 14mm, and anti-freezing property parameter is 1.34%, and Sulphate-resistant property parameter is 87%, and anti-villaumite performance perameter is 2.13 and 465.
Embodiment 2l
Cement 262kg/m
3, flyash 44kg/m
3, slag 94kg/m
3, anticorrodent 34kg/m
3, sand 640kg/m
3, stone 1187kg/m
3, water 143kg/m
3, water reducer 1.8% air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 63.4MPa, and tensile strength is 4.46MPa, and anti-permeability performance parameter is 7mm, and anti-freezing property parameter is 0.95%, and Sulphate-resistant property parameter is 94%, and anti-villaumite performance perameter is 1.32 and 435.
3rd group of embodiment
Embodiment 3a
Cement 250kg/m
3, slag 164kg/m
3, sand 649kg/m
3, stone 1200kg/m
3, water 148kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 63.4MPa, and tensile strength is 4.38MPa, and anti-permeability performance parameter is 5mm, and anti-freezing property parameter is 1.15%, and Sulphate-resistant property parameter is 96%, and anti-villaumite performance perameter is 1.22 and 465.
Embodiment 3b
Cement 263kg/m
3, flyash 45kg/m
3, slag 134kg/m
3, sand 622kg/m
3, stone 1201kg/m
3, water 146kg/m
3, water reducer 1.2% air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 58.4MPa, and tensile strength is 3.78MPa, and anti-permeability performance parameter is 14mm, and anti-freezing property parameter is 1.38%, and Sulphate-resistant property parameter is 84%, and anti-villaumite performance perameter is 1.75 and 536.
Embodiment 3c
Cement 259kg/m
3, flyash 44kg/m
3, slag 96kg/m
3, anticorrodent 36kg/m
3, sand 640kg/m
3, stone 1189kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 65.2MPa, and tensile strength is 4.54MPa, and anti-permeability performance parameter is 5mm, and anti-freezing property parameter is 0.65%, and Sulphate-resistant property parameter is 97%, and anti-villaumite performance perameter is 1.24 and 295.
Embodiment 3d
Cement 250kg/m
3, slag 167kg/m
3, sand 649kg/m
3, stone 1200kg/m
3, water 149kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 58.5MPa, and tensile strength is 4.56MPa, and anti-permeability performance parameter is 10mm, and anti-freezing property parameter is 1.15%, and Sulphate-resistant property parameter is 88%, and anti-villaumite performance perameter is 1.57 and 486.
Embodiment 3e
Cement 266kg/m
3, flyash 45kg/m
3, slag 134kg/m
3, sand 622kg/m
3, stone 1201kg/m
3, water 146kg/m
3, water reducer 1.2% air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 59.2MPa, and tensile strength is 3.72MPa, and anti-permeability performance parameter is 13mm, and anti-freezing property parameter is 1.32%, and Sulphate-resistant property parameter is 86%, and anti-villaumite performance perameter is 2.25 and 534.
Embodiment 3f
Cement 265kg/m
3, flyash 45kg/m
3, slag 96kg/m
3, anticorrodent 35kg/m
3, sand 640kg/m
3, stone 1188kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 62.1MPa, and tensile strength is 4.12MPa, and anti-permeability performance parameter is 7mm, and anti-freezing property parameter is 1.42%, and Sulphate-resistant property parameter is 89%, and anti-villaumite performance perameter is 1.67 and 445.
Embodiment 3g
Cement 242kg/m
3, flyash 41kg/m
3, slag 89kg/m
3, anticorrodent 31kg/m
3, sand 669kg/m
3, stone 1189kg/m
3, water 144kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 66.4MPa, and tensile strength is 4.48MPa, and anti-permeability performance parameter is 5mm, and anti-freezing property parameter is 1.03%, and Sulphate-resistant property parameter is 94%, and anti-villaumite performance perameter is 1.53 and 334.
Embodiment 3h
Cement 266kg/m
3, flyash 45kg/m
3, slag 134kg/m
3, sand 622kg/m
3, stone 1200kg/m
3, water 146kg/m
3, water reducer 1.2%, air entrapment agent 0.01%.
Experimental data is as follows: ultimate compression strength is: 58.5MPa, and tensile strength is 4.24MPa, and anti-permeability performance parameter is 12mm, and anti-freezing property parameter is 0.88%, and Sulphate-resistant property parameter is 91%, and anti-villaumite performance perameter is 1.33 and 385.
Embodiment 3i
Cement 261kg/m
3, flyash 44kg/m
3, slag 96kg/m
3, anticorrodent 35kg/m
3, sand 639kg/m
3, stone 1189kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows: ultimate compression strength is: 68.5MPa, and tensile strength is 4.64MPa, and anti-permeability performance parameter is 4mm, and anti-freezing property parameter is 0.78%, and Sulphate-resistant property parameter is 95%, and anti-villaumite performance perameter is 1.43 and 356.
In above-mentioned each group of embodiment, the formula of anticorrodent is as follows: the calcium sulfate of 50 weight parts, the sodium aluminate of 12 weight parts, the calcium oxide of 14 weight parts and the calcium aluminate of 25 weight parts.In order to study the effect of anticorrodent further, test as follows:
4th group of embodiment
Described anticorrodent is made up of the calcium sulfate of 45-55 weight part, the sodium aluminate of 10-15 weight part and the calcium oxide of 12-18 weight part, the calcium aluminate of 20-30 weight part.
Embodiment 4a
In this embodiment, each composition is as follows: cement 260kg/m
3, flyash 43kg/m
3, slag 95kg/m
3, anticorrodent 35kg/m
3, sand 639kg/m
3, stone 1188kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.Wherein, the composition of anticorrodent is as follows: the calcium sulfate of 48 weight parts, the sodium aluminate of 12 weight parts, the calcium oxide of 16 weight parts and the calcium aluminate of 24 weight parts.
Embodiment 4b
Other compositions are identical with embodiment 4a, and the composition of anticorrodent is as follows: the calcium sulfate of 48 weight parts, the sodium aluminate of 12 weight parts, the calcium oxide of 16 weight parts and the calcium aluminate of 24 weight parts.
Embodiment 4c
Other compositions are identical with embodiment 4a, and the composition of anticorrodent is as follows: the calcium sulfate of 52 weight parts, the sodium aluminate of 10 weight parts, the calcium oxide of 14 weight parts and the calcium aluminate of 28 weight parts.
Embodiment 4d
Other compositions are identical with embodiment 4a, and the composition of anticorrodent is as follows: the calcium sulfate of 45 weight parts, the sodium aluminate of 14 weight parts, the calcium oxide of 12 weight parts and the calcium aluminate of 20 weight parts.
Embodiment 4e
Other compositions are identical with embodiment 4a, and the composition of anticorrodent is as follows: the calcium sulfate of 55 weight parts, the sodium aluminate of 15 weight parts, the calcium oxide of 12 weight parts and the calcium aluminate of 30 weight parts.
Embodiment 4f
Other compositions are identical with embodiment 4a, and the composition of anticorrodent is as follows: the calcium sulfate of 52 weight parts, the sodium aluminate of 10 weight parts, the calcium oxide of 18 weight parts and the calcium aluminate of 28 weight parts.
The composition of the control group 1 of this group embodiment is as follows: cement 295kg/m
3, flyash 43kg/m
3, slag 95kg/m
3, sand 639kg/m
3, stone 1188kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
The composition of the control group 2 of this group embodiment is as follows: cement 260kg/m
3, flyash 43kg/m
3, slag 95kg/m
3, the conventional anticorrodent 35kg/m that commercial Nanjing Hydraulic Research Institute produces
3, sand 639kg/m
3, stone 1188kg/m
3, water 143kg/m
3, water reducer 1.8%, air entrapment agent 0.02%.
Experimental data is as follows:
Embodiment 4a to 4d sulfate resistance index is respectively 95,94,95,92,93 and 96.The sulfate resistance index of this control group 1 and 2 is respectively 85,88.Anti-villaumite index is 1.04/295,1.11/305,1.15/325,1.32/310,1.08/385, and 1.05/345, the anti-villaumite index of control group 1 and 2 is respectively 2.28/534,1.95/453.
In a word, from above-described embodiment, after adding slag, the resistance to corrosion of concrete product significantly strengthens.Analyze from microscopic mechanism: the slag with higher lateral reactivity, after hydrated reaction of cement, more progressively can carry out secondary hydration, and maintain this reaction for a long period of time.The secondary hydration of slag, makes concrete more and more closely knit with the growth in the length of time.On the other hand, concrete due to admixture large dosage slag can absorb the chlorion that major part invades inside concrete, wherein a part is physisorption, another part is that chemical combination and ion-exchange form double salt), thus make the chlorion being diffused into inside concrete lose " dissociating " character, be difficult to arrive around reinforcing bar.Equally, after adding coal ash, due to the secondary hydration effect of flyash, within considerable time, make concrete more and more finer and close, thus reduce the intrusion of chlorion, the erosion action of chlorion to Steel Concrete is controlled an extremely low limit.
Moreover, from the 4th group of experiment: after adding slag and flyash, concrete volume stability is poor, easy contraction, occur crackle, and anticorrodent can increase concrete compactness, is not easy to occur crackle, thus vitriol or villaumite etc. can be stoped to enter in concrete, the corrosion resistance nature of Concrete Structure.Compared with the anticorrodent of Shui Ke institute, from above-mentioned experiment its corrosion resistant better effects if known, the price of calcium aluminate is lower simultaneously, thus concrete holistic cost is lower, it should be noted that, calcium aluminate makes the robustness of anticorrodent better, when the physicochemical property of other components changes, the such as change etc. of calcium sulfate water content, this point is very valuable in practice, because anticorrodent transports, can change during storage, if physico-chemical property changes and to impact the Corrosion Protection of anticorrodent, then it can make a big impact to concrete quality, in anticorrodent of the present invention, the performance of calcium aluminate itself is very stable, there is the effect of similar synergistic agent simultaneously, the overall performance of anticorrodent can be improved.
Finally, after adding air entrapment agent, air entrapment agent produces a kind of discontinuous bubble, and blocking-up vitriol or villaumite enter, and therefore can improve concrete corrosive nature.In addition, after adding air entrapment agent, there is bubble centre, and rigidity reduces, and flexible reinforced, can reduce the fracture in piling process.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple equivalents to technical scheme of the present invention, these equivalents all belong to protection scope of the present invention.
Claims (10)
1. there is a concrete for sulfate resistance and precenting chlorate corrosion performance, it is characterized in that, comprise following each component:
Glue material 368 ~ 453kg/m
3, sand 621 ~ 677kg/m
3, stone 1142 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%;
Wherein, above-mentioned per-cent refers to the mass ratio of water reducer, air entrapment agent or anticorrodent and glue material; Described glue material comprises cement, at least one in slag or flyash, and anticorrodent.
2. have the concrete of sulfate resistance and precenting chlorate corrosion performance as claimed in claim 1, it is characterized in that, described water reducer comprises aliphatic water reducing agent, polycarboxylate water-reducer and naphthalene water reducer.
3. have the concrete of sulfate resistance and precenting chlorate corrosion performance as claimed in claim 1, it is characterized in that, described air entrapment agent is HK-F2.
4. there is the concrete of sulfate resistance and precenting chlorate corrosion performance as claimed in claim 1, it is characterized in that, described anticorrodent is made up of the calcium sulfate of 45-55 weight part, the sodium aluminate of 10-15 weight part and the calcium oxide of 12-18 weight part, the calcium aluminate of 20-30 weight part.
5. the concrete with sulfate resistance and precenting chlorate corrosion performance as described in any one of Claims 1-4, is characterized in that,
Cement 276-385kg/m
3, flyash 68-101kg/m
3, sand 643 ~ 677kg/m
3, stone 1142 ~ 1201kg/m
3, water 145 ~ 147kg/m
3, water reducer 1.2 ~ 1.3%, and air entrapment agent 0.01 ~ 0.02%.
6. the concrete with sulfate resistance and precenting chlorate corrosion performance as described in any one of Claims 1-4, is characterized in that,
Glue material 373 ~ 442kg/m
3, sand 621 ~ 677kg/m
3, stone 1188 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%; Wherein, in glue material, the consumption of cement is 224-365kg/m
3, the total amount of flyash, slag and anticorrodent is the 40wt%-40.4wt% of glue material total amount.
7. have the concrete of sulfate resistance and precenting chlorate corrosion performance as claimed in claim 6, it is characterized in that, the quality of described flyash is 10% of glue material amount, and the quality of slag is 30% of glue material amount; Or the quality of described slag is the 40%-40.4% of glue material amount; Or the quality of flyash is 10% of glue material amount, slag quality is 22% of glue material amount, and anticorrodent is 8% of glue material amount.
8. the concrete with sulfate resistance and precenting chlorate corrosion performance as described in any one of Claims 1-4, is characterized in that,
Glue material 400 ~ 442kg/m
3, sand 621 ~ 668kg/m
3, stone 1188 ~ 1201kg/m
3, water 143 ~ 149kg/m
3, water reducer 1.2 ~ 1.8%, air entrapment agent 0.01 ~ 0.02%, and anticorrodent 0 ~ 8.4%; Wherein, in glue material, the consumption of cement is 224-365kg/m
3, the total amount of flyash, slag and anticorrodent is the 40wt%-40.4wt% of glue material total amount.
9. there is the concrete of sulfate resistance and precenting chlorate corrosion performance as claimed in claim 8, it is characterized in that,
The quality of described flyash is 10% of glue material amount, and the quality of slag is 30% of glue material amount; Or the quality of described slag is the 40%-40.4% of glue material amount; Or the quality of flyash is 10% of glue material amount, slag quality is 22% of glue material amount, and anticorrodent is 8% of glue material amount.
10. a concrete member, is characterized in that, comprises the concrete with sulfate resistance and precenting chlorate corrosion performance described in any one of claim 1 to 9.
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