CN103835189B - Method for researching new building material under low-temperature environment - Google Patents
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- CN103835189B CN103835189B CN201310742849.1A CN201310742849A CN103835189B CN 103835189 B CN103835189 B CN 103835189B CN 201310742849 A CN201310742849 A CN 201310742849A CN 103835189 B CN103835189 B CN 103835189B
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Abstract
The invention relates to a method for researching a new building material under the low-temperature environment. The method specifically includes the steps of (1) manufacturing a test piece; (2) measuring data; (3) carrying out specific procedures, wherein the specific procedures are as follows: (3a) carrying out Pykrete mechanical performance testing, (3b) carrying out a fiber improvement scheme, (3c) performing a gel improvement scheme and (3d) conducting a circulation freeze-thaw experiment. According to the technical method, a mathematical model is built, mathematical formulas are derived, properties of the building material are deeply researched, and accordingly the optimal proportion interval range of the new building material is obtained, namely gelatin to CMC to PAM is 50%-60% to 38%-45% to 2%-5%. In a frozen newspaper sample of the proportion, the compressive strength mean value can reach 34-36MPa and can basically meet demands of common low-temperature buildings; meanwhile, breaking strength of the sample is about 1.8 times that of a concrete sample, toughness is high, and the building technology can be optimized under special environments.
Description
Technical field
The present invention relates under low temperature environment New Building Materials research method, belong to building material technical field.
Background technology
Progress with the epoch and the progressively development of science and technology, the civil engineering construction under low-temperature deep environment is just emerging
Rise.Concrete is a kind of conventional construction material, but is easily subject to frost and melt damage at low ambient temperatures, leads to its structural damage；High-strength
Plasticity and toughness are also significantly deteriorated degree steel at low ambient temperatures.Therefore, a kind of new low temperature meeting sustainable development requirement
Construction material needs to be developed and utilize.
Parker Rui Te (Pykrete) is a kind of advanced composite material (ACM), and the wood chip by 14% and 86% water (mass ratio) are constituted.
There are document report, the auspicious peculiar two big characteristics of Parker after cryogenic freezing process：One is to have higher intensity it might even be possible to shellproof；
Two is because its thermal conductivity is relatively low, causes thawing speed extremely slow.This problem is passed through to improve the formula of material, replaces wood chip simultaneously using newspaper
Carry out contrast experiment, be successfully made a kind of have intensity height, good toughness, curing time short, with low cost the features such as compound
Material.This composite can be used for low temperature building field, meets the requirement of sustainable development.
Content of the invention
It is an object of the invention to provide under a kind of low temperature environment New Building Materials research method to set up mathematics
Model, the method such as derivation mathematical formulae, deeply probe into the property of construction material, and draw optimum proportioning.
To achieve these goals, technical scheme is as follows.
Under a kind of low temperature environment, the research method of New Building Materials, specific as follows：
(1) test specimen preparation method：Weigh the wood chip of amount of calculation or newspaper in container, inject distilled water, make material and water
It is fully contacted and discharge bubble；Slowly it is transferred in mould after its water suction completely again；Send into cryogenic freezing room and adjust properly
Temperature；Freezing can be taken off test specimen after 48 hours.
(2) determination data：Determine the resistance to compression of composite by GB/T 50107-2010, GB/T 50081-2002 isotactic location survey
Intensity, rupture strength and backfin ratio.
(3) detailed process is：
(3a) carry out the Mechanics Performance Testing of Parker Rui Te；
(3b) carry out fibers for improved scheme：Using fibers for improved scheme, substitute wood chip using the longer newspaper of fiber, measure
Its mechanical property analyze data.Fiber its structure of longer newspaper is difficult to wreck under weight, its resistance to compression and anti-folding
It is greatly improved for intensity spy auspicious compared with Parker.Newspaper toughness under low-temperature condition is high and be unlikely to bursting by freezing, be a kind of even more ideal
Low temperature construction material, meet the requirement of sustainable development.However, the hydroxyl between fiber is with Hydrogenbond, this in paper
Relatively low in conjunction with not only bond energy ratio, and be easy to be destroyed by hydrone.Therefore, we add gel in newspaper, strengthen paper fine
Dimension adhesion, improves this composite；
(3c) gel evolutionary approach：Choose following four gel to be studied：Sodium carboxymethylcellulose (CMC)：Water-soluble
In liquid mainly presented in anion, viscosity is up to 2000.Polyacrylamide (PAM)：In aqueous mainly with sun from
Presented in son, it is commonly used for flocculant.Gelatin：Copolymer can be formed with CMC, easily congeal, there is biodegradability, nontoxic
Pollution-free.Agar：Wide variety of coagulator, thickener, easily congeals.Respectively using magnetic force heating stirrer at 60 ~ 80 DEG C
Four kinds of gels of configuration, are cooled to room temperature after dissolving completely, observe phenomenon.The gel of amount of calculation and newspaper are sufficiently mixed, low
Condense moulding under warm environment, by testing its mechanical strength, select most suitable material mixture ratio. it is configured with the mixed of gelatin and CMC
Close gel, and introduce a small amount of PAM (2% ~ 5%), so that CMC more good dissolving in water.Derive that CMC accounts for gel mass ratio (x ∈
[0,0.6]) fitting formula to newspaper Effect on Mechanical Properties：
fcug=-0.028x2+0.2631x+0.811 R1 2=0.9491 (1)
ffg=-0.027x2+0.2756x+0.941 R2 2=0.9829 (2)
σcug/fg=-0.0044x3+0.0445x2-0.1325x+0.99 R3 2=0.932 (3)
Repeatedly tested within the interval range near resistance to compression and rupture strength optimal value, drawn the optimal of gel
Proportioning is gelatin (50% ~ 60%): CMC (38%~45%): PAM (2%~5%).In the frost newspaper sample under this proportioning,
Compression strength mean value, up to 34 ~ 36MPa, meets the demand of general low temperature building；Meanwhile, the rupture strength of sample is about and mixes
1.8 times of solidifying soil sample, toughness is higher, can optimize the Building technology under particular surroundings.
(3d) circulating freezing resistance experiment：
Concrete intensity in low-temperature circulating frozen process experiment substantially reduces, and the embodiment of the present invention also contrasts and carried out low temperature and follow
Ring freeze thawing is tested, and Frozen-thawed cycled temperature is -40 DEG C ~ 0 DEG C；Measure its compression strength and rupture strength respectively, carry out with former test specimen
Comparing, ratio calculated respectively, find that Strength Changes less, can recycle in testing for Parker Rui Te and newspaper, symbol
Close the requirement of sustainable development.
This beneficial effect of the invention is：The technology of the present invention method, by founding mathematical models, derivation mathematical formulae etc.
Method, has deeply probed into the property of construction material, has had the effect that：(1) fiber overlap can significantly increase the strength of materials, fine
Between the length of dimension and fiber, adhesion have impact on material property.(2) CMC is notable to the enhancing of paper fiber adhesion, and reason is CMC
The carboxyl producing after ionizing in water occurs chemical hydration effect to enhance interfibrous adhesion with the hydroxyl on fiber.(3)
Gelatin is also very notable to the raising of paper fiber adhesion, and reason is that gelatin can be with fiber with ionic bond or Covalent bonding together, these
The adhesion that key is formed such that between paper fiber increases, and bond energy raises, so that the physical strength of paper is improved.(4)-
After 40 DEG C ~ 0 DEG C low temperature Frozen-thawed cycled 10 times, concrete crushing strength have dropped about 11.8%, and rupture strength have dropped about 41.2%,
And Parker Rui Te and newspaper, almost without impact, illustrate that this new type low temperature construction material can be resistant to Frozen-thawed cycled, meet sustainable
The purpose of development.(5) drawn optimum proportioning interval range gelatin (50% ~ 60%) of new type low temperature construction material: CMC
(38%~45%): PAM (2%~5%).In the frost newspaper sample under this proportioning, compression strength mean value up to 34 ~ 36MPa,
Substantially can meet the demand of general low temperature building；Meanwhile, the rupture strength of sample is about 1.8 times of concrete sample,
Toughness is higher, can optimize the Building technology under particular surroundings.
Brief description
Fig. 1 is the compression strength curve map of Parker Rui Te in the embodiment of the present invention.
Fig. 2 is the rupture strength curve map of Parker Rui Te in the embodiment of the present invention.
Fig. 3 is the compression strength curve map freezing newspaper in the embodiment of the present invention.
Fig. 4 is the rupture strength curve map freezing newspaper in the embodiment of the present invention.
Fig. 5 is the mechanical property comparison diagram of newspaper in the embodiment of the present invention, Parker Rui Te and concrete.
Fig. 6 is gel modification Parker auspicious spy compression strength value added figure in the embodiment of the present invention.
Fig. 7 is gel modification Parker auspicious spy rupture strength value added figure in the embodiment of the present invention.
Fig. 8 is gel modification newspaper compression strength value added figure in the embodiment of the present invention.
Fig. 9 is gel modification newspaper rupture strength value added figure in the embodiment of the present invention.
Figure 10 is that in the embodiment of the present invention, CMC accounts for the impact figure that gel quality compares newspaper mechanical property.
Figure 11 is the optimum proportioning figure of new type low temperature construction material in the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples the specific embodiment of the present invention is described, to be better understood from this
Bright.
Embodiment
Under low temperature environment, the research method of New Building Materials, specific as follows：
(1) main agents and instrument：Polyacrylamide [CH2CH(CONH2)] n , Tianjin good fortune morning chemical reagent factory；Carboxymethyl
Sodium cellulosate R n OCH2COONa, Tianjin causes remote chemical reagent factory；Edible gelatin C102H151O39N31；Tianjin Bo Di chemical company；Fine jade
Fat (C12H18O9) n ；Shanghai Chinese medicines group.It is pure that above reagent is analysis.Universal material testing instrument (1000kN)；Cryogenic freezing
Room；Magnetic force heating stirrer.
(2) test specimen preparation method：Weigh the wood chip of amount of calculation or newspaper in container, inject distilled water, make material and water
It is fully contacted and discharge bubble；Slowly it is transferred in mould after its water suction completely again；Send into cryogenic freezing room and adjust properly
Temperature；Freezing can be taken off test specimen after 48 hours.
(3) determination data：Determine the resistance to compression of composite by GB/T 50107-2010, GB/T 50081-2002 isotactic location survey
Intensity, rupture strength and backfin ratio.
(3a) computational methods of material compression strength：
Specimen size：150mm×150mm×150mm；
Compression strength calculating formula：
fcu=P/A (1-1)；
In formula：f cu Test specimen compression strength (MPa)；
PTest specimen resistance to compression load (N)；
ATest specimen bearing area (mm2)；
(3b) computational methods of material rupture strength：
Specimen size：150mm×150mm×550mm；
Rupture strength calculating formula：
ff=(Fl)/(bh2) (1-2)
In formula：f f Test specimen rupture strength (MPa)；FTest specimen failing load (N)；
lSpan (mm) between bearing；hTest specimen depth of section (mm)；bTest specimen cross-sectional width (mm)；
(3c) computational methods of material backfin ratio：
Calculating formula is compared in backfin：
σcu/f=fcu/ff(1-3)
In formula：σ cu/f Test specimen backfin ratio；
(4) detailed process is：
(4a) Mechanics Performance Testing of Parker Rui Te：
Make Parker auspicious spy test specimen, using its mechanical property of Instrument measuring, and record data is in table 1.Fig. 1 is this
The compression strength curve map of Parker Rui Te in bright embodiment.Fig. 2 is the rupture strength curve of Parker Rui Te in the embodiment of the present invention
Figure.
The mensure of table 1 Parker auspicious spy Mechanical Data
This material of data display has high withstand voltage, resistance to tensile strength, and backfin ratio is little, good toughness.Data standard difference is little, explanation
Sample measurement is accurately effective.By observing the plane of disruption, can Preliminary conclusion：The fiber overlap of wood chip makes material mechanical performance big
Big enhancing.However, wood fibre is shorter, between fiber, adhesion is weaker, and therefore we carry out fibers for improved scheme.
(4b) fibers for improved scheme：
For microcosmic meaning, between fibre length and fiber, adhesion decides the performance of composite.Fibre modification is mixed
Solidifying soil has good fracture resistance.Using fibers for improved scheme, substitute wood chip using the longer newspaper of fiber, measure its mechanics
Performance analyze data, respectively table 2, table 3.Fig. 3 is the compression strength curve map freezing newspaper in the embodiment of the present invention.Fig. 4
It is the rupture strength curve map freezing newspaper in the embodiment of the present invention.Fig. 5 be newspaper in the embodiment of the present invention, Parker Rui Te and
The mechanical property comparison diagram of concrete.
Table 2 freezes the mensure of the Mechanical Data of newspaper
The Nature comparison of table 3 newspaper, Parker Rui Te and concrete
Data above explanation：Fiber its structure of longer newspaper is difficult to wreck under weight, its resistance to compression and anti-folding
It is greatly improved for intensity spy auspicious compared with Parker.Newspaper toughness under low-temperature condition is high and be unlikely to bursting by freezing, be a kind of even more ideal
Low temperature construction material, meet the requirement of sustainable development.
However, in paper the hydroxyl between fiber with Hydrogenbond, not only bond energy ratio is relatively low for this combination, and is easy to
Destroyed by hydrone.Therefore, we add gel in newspaper, strengthen paper fiber adhesion, improve this composite.
(4c) gel evolutionary approach：
Gel modified concrete be a kind of researching and developing and perfect new departure, the intensity of concrete can be effectively improved；
Meanwhile, purposes in paper industry for the gel is more extensive.This problem has carried out the special item of gel, and data is full and accurate abundant.
Have chosen following four gel to be studied：Sodium carboxymethylcellulose (CMC)：In aqueous mainly with anion
Presented in, viscosity is up to 2000.Polyacrylamide (PAM)：In aqueous mainly presented in cation, commonly use
Make flocculant.Gelatin：Copolymer can be formed with CMC, easily congeal, there is biodegradability, nontoxic pollution-free.Agar：Extensively
The coagulator of application, thickener, easily congeals.
Configure four kinds of gels using magnetic force heating stirrer at 60 ~ 80 DEG C respectively, after dissolving completely, be cooled to room temperature, see
Examine phenomenon.By data record in table 4.
The experimental study of table 4 gelling properties
The gel of amount of calculation and newspaper are sufficiently mixed, condense moulding at low ambient temperatures, by testing its mechanical strength,
Select most suitable material mixture ratio, data record is in table 5.Fig. 6 is gel modification Parker auspicious spy resistance to compression in the embodiment of the present invention
Intensity value added figure.Fig. 7 is gel modification Parker auspicious spy rupture strength value added figure in the embodiment of the present invention.Fig. 8 is this
Gel modification newspaper compression strength value added figure in bright embodiment.Fig. 9 is that in the embodiment of the present invention, the anti-folding of gel modification newspaper is strong
Degree value added figure.
The impact to Parker Rui Te, newspaper intensity for the different types of gel of table 5
Found according to data above, CMC is the most notable to the enhancing of fibrous binding force, and reason is after CMC ionizes in water
The carboxyl producing occurs chemical hydration effect to enhance interfibrous adhesion with the hydroxyl on fiber.Gelatin combines to paper fiber
The raising of power is also very notable, and reason is that gelatin can be with fiber with ionic bond or covalent bond, and these keys are formed such that between paper fiber
Adhesion increase, bond energy raise so that the physical strength of paper is improved.
According to above property, it is configured with the mixed gel of gelatin and CMC, and introduce a small amount of PAM (2% ~ 5%), so that CMC
More good dissolving in water.Through many experiments, obtain the data in table 6.Figure 10 is that in the embodiment of the present invention, CMC accounts for gelling
Amount compares the impact figure of newspaper mechanical property.
Table 6 CMC accounts for the impact that gel quality compares newspaper intensity
According to data above, the CMC that derived accounts for the plan to newspaper Effect on Mechanical Properties for the gel mass ratio (x ∈ [0,0.6])
Close formula：
fcug=-0.028x2+0.2631x+0.811 R1 2=0.9491 (1)
ffg=-0.027x2+0.2756x+0.941 R2 2=0.9829 (2)
σcug/fg=-0.0044x3+0.0445x2-0.1325x+0.99 R3 2=0.932 (3)
Have studied above-mentioned fitting formula, carried out repeatedly within the interval range near resistance to compression and rupture strength optimal value
Experiment, show that the optimum proportioning of gel is gelatin (50% ~ 60%): CMC (38%~45%): PAM (2%~5%).In this proportioning
Under frost newspaper sample in, compression strength mean value up to 34 ~ 36MPa, can meet general low temperature building substantially
Demand；Meanwhile, the rupture strength of sample is about 1.8 times of concrete sample, and toughness is higher, can optimize the building under particular surroundings
Technology.Figure 11 is the optimum proportioning figure of new type low temperature construction material in the embodiment of the present invention.
(4d) circulating freezing resistance experiment：
Concrete intensity in low-temperature circulating frozen process experiment substantially reduces, and the embodiment of the present invention also contrasts and carried out low temperature and follow
Ring freeze thawing is tested, and Frozen-thawed cycled temperature is -40 DEG C ~ 0 DEG C；Measure its compression strength and rupture strength respectively, carry out with former test specimen
Comparing, ratio calculated respectively, find that Strength Changes less, can recycle in testing for Parker Rui Te and newspaper, symbol
Close the requirement of sustainable development.
The impact to material mechanical performance for the table 7 low-temperature circulating frozen process experiment
(4e) non-standard sample conversion coefficient：
Specify in GB/T50107-2010, standard testing test specimen size is 150mm × 150mm × 150mm, in non-standard shape
Below C60 concrete strength can be calculated using the compression strength that conversion coefficient is multiplied by this state under state.100mm×100mm
The conversion coefficient of the sample of × 100mm is 0.95；The conversion coefficient of the sample of 200mm × 200mm × 200mm is 1.05.In order to
It is easy to calculate, the present embodiment also takes both the above non-standard Specimen Determination conversion coefficient respectively, reacted this kind of strength of materials
Dimensional effect, be listed as follows；
The non-standard sample compression strength conversion coefficient of table 8
(5) analysis and conclusion：
1. the compression strength of Parker Rui Te is about 12.25MPa, and rupture strength is about 5.06MPa, backfin ratio about 2.43.
2. the compression strength of frost newspaper is about 21.70MPa, and rupture strength is about 8.04MPa, backfin ratio about 2.71.
3. fiber overlap can significantly increase the strength of materials, and between the length of fiber and fiber, adhesion have impact on material
Energy.
4. CMC is notable to the enhancing of paper fiber adhesion, and reason is on the carboxyl and fiber producing after CMC ionizes in water
Hydroxyl occur chemical hydration effect enhance interfibrous adhesion.
5. gelatin is also very notable to the raising of paper fiber adhesion, and reason is that gelatin can be with fiber with ionic bond or covalent bond
In conjunction with the adhesion that these keys are formed such that between paper fiber increases, and bond energy raises, so that the physical strength of paper is carried
High.
6., after -40 DEG C ~ 0 DEG C low temperature Frozen-thawed cycled 10 times, concrete crushing strength have dropped about 11.8%, rupture strength
Have dropped about 41.2%, and Parker Rui Te and newspaper, almost without impact, illustrate that this new type low temperature construction material can freeze-thawing resistant follow
Ring, meets the purpose of sustainable development.
The optimum proportioning interval range of the new type low temperature construction material 7. drawing is：Gelatin (50% ~ 60%): CMC (38%~
45%): PAM (2%~5%).In the frost newspaper sample under this proportioning, compression strength mean value up to 34.00 ~
36.00MPa, can meet the demand of general low temperature building substantially；Meanwhile, the rupture strength of sample is about concrete sample
1.8 times, toughness is higher, can optimize the Building technology under particular surroundings.
The above is the preferred embodiment of the present invention it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (1)
1. under a kind of low temperature environment construction material research method it is characterised in that：Specific as follows：
(1) main agents and instrument：PolyacrylamideTianjin good fortune morning chemical reagent factory；Carboxymethyl cellulose
Plain sodium RnOCH2COONa, Tianjin causes remote chemical reagent factory；Edible gelatin C102H151O39N31, Tianjin Bo Di chemical company；Agar
(C12H18O9)n, Shanghai Chinese medicines group；It is pure that above reagent is analysis；1000kN universal material testing instrument；Cryogenic freezing room；Magnetic
Power heating stirrer；
(2) test specimen preparation method：Weigh the wood chip of amount of calculation or newspaper in container, inject distilled water, make material abundant with water
Contact and discharge bubble；Slowly it is transferred in mould after its water suction completely again；Send into cryogenic freezing room and adjust suitable temperature
Degree；Freezing took out test specimen after 48 hours；
(3) determination data：By GB/T 50107-2010, GB/T 50081-2002 specify measure composite compression strength,
Rupture strength and backfin ratio；
(3a) computational methods of material compression strength：
Specimen size：150mm×150mm×150mm；
Compression strength calculating formula：
In formula：fcuTest specimen compression strength, unit is MPa；
P test specimen resistance to compression load, unit is N；
A test specimen bearing area, unit is mm2；
(3b) computational methods of material rupture strength：
Specimen size：150mm×150mm×550mm；
Rupture strength calculating formula：
In formula：ffTest specimen rupture strength, unit is MPa；F test specimen failing load, unit is N；
Span between l bearing, unit is mm；H test specimen depth of section, unit is mm；B test specimen cross-sectional width, unit is mm；
(3c) computational methods of material backfin ratio：
Calculating formula is compared in backfin：
In formula：σcu/fTest specimen backfin ratio；
(4) detailed process is：
(4a) Mechanics Performance Testing of Parker Rui Te：
Make Parker auspicious spy test specimen, using its mechanical property of Instrument measuring, and record data is in table；
(4b) fibers for improved scheme：
For microcosmic meaning, between fibre length and fiber, adhesion decides the performance of composite；Using fibers for improved side
Case, substitutes wood chip using the longer newspaper of fiber, measures fibers for improved scheme mechanical property analyze data；
(4c) gel evolutionary approach：
Have chosen following four gel to be studied：Sodium carboxymethylcellulose CMC：In aqueous mainly in the form of anion
Exist, viscosity reaches 2000；Polyacrylamide PAM：In aqueous mainly presented in cation, it is commonly used for flocculant；
Gelatin：Copolymer can be formed with CMC, easily congeal, there is biodegradability, nontoxic pollution-free；Agar：Wide variety of solidification
Agent, thickener, easily congeals；
Configure four kinds of gels using magnetic force heating stirrer at 60～80 DEG C respectively, after dissolving completely, be cooled to room temperature, observe
Phenomenon；By data record in table；
According to data above, derivation CMC accounts for the fitting formula to newspaper Effect on Mechanical Properties for gel mass ratio x ∈ [0,0.6]：
fcug=0.028x2+0.2631x+0.811 R1 2=0.9491
ffg=0.027x2+0.2756x+0.941 R2 2=0.9829
σcug/fg=0.0044x3+0.0445x2–0.1325x+0.99 R3 2=0.932
Have studied above-mentioned fitting formula, carried out repeatedly real within the interval range near resistance to compression and rupture strength optimal value
Test, show that the optimum proportioning of gel is gelatin 50%～60%:CMC38%～45%:PAM2%～5%；Under this proportioning
In frost newspaper sample, compression strength mean value reaches 34～36MPa, has met the demand of general low temperature building；Meanwhile, sample
Rupture strength be 1.8 times of concrete sample, toughness is higher, can optimize the Building technology under particular surroundings；
(4d) circulating freezing resistance experiment：
Concrete intensity in low-temperature circulating frozen process experiment substantially reduces, and also contrast has carried out low-temperature circulating freeze thawing test, freeze thawing
Circulating temperature is -40 DEG C～0 DEG C；Measure its compression strength and rupture strength respectively, carry out comparing with former test specimen, count respectively
Calculate ratio, find that Strength Changes less, can recycle in testing for Parker Rui Te and newspaper, meet wanting of sustainable development
Ask；
(4e) non-standard sample conversion coefficient：
Specify in GB/T50107-2010, standard testing test specimen size is 150mm × 150mm × 150mm, under off-rating
Calculate below C60 concrete strength using the compression strength that conversion coefficient is multiplied by this state； 100mm×100mm×100mm
Sample conversion coefficient be 0.95；The conversion coefficient of the sample of 200mm × 200mm × 200mm is 1.05；For the ease of meter
Calculate, take both the above non-standard Specimen Determination conversion coefficient respectively, reacted the dimensional effect of this kind of strength of materials, list；
(5) analysis and conclusion：
1. the compression strength of Parker Rui Te is 12.25MPa, and rupture strength is 5.06MPa, and backfin ratio is for 2.43；
2. the compression strength of frost newspaper is 21.70MPa, and rupture strength is 8.04MPa, and backfin ratio is for 2.71；
3. fiber overlap can significantly increase the strength of materials, and between the length of fiber and fiber, adhesion have impact on material property；
4. CMC is notable to the enhancing of paper fiber adhesion, and reason is the hydroxyl on the carboxyl and fiber producing after CMC ionizes in water
Base occurs chemical hydration effect to enhance interfibrous adhesion；
5. gelatin is also very notable to the raising of paper fiber adhesion, and reason is that gelatin can be with fiber with ionic bond or covalently bonded
Close, the adhesion that these keys are formed such that between paper fiber increases, and bond energy raises, so that the physical strength of paper is carried
High；
6. after -40 DEG C～0 DEG C low temperature Frozen-thawed cycled 10 times, concrete crushing strength have dropped 11.8%, and rupture strength declines
41.2%, and Parker Rui Te and newspaper, almost without impact, illustrate that this low temperature construction material can be resistant to Frozen-thawed cycled, meet can
The purpose of sustainable development；
The optimum proportioning interval range of the low temperature construction material 7. drawing is：Gelatin 50%～60%:CMC 38%～45%:
PAM2%～5%；In the frost newspaper sample under this proportioning, compression strength mean value reaches 34.00～36.00MPa, substantially
The demand of general low temperature building can be met；Meanwhile, the rupture strength of sample is 1.8 times of concrete sample, and toughness is higher, can
Optimize the Building technology under particular surroundings.
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| TWI635942B (en) * | 2017-09-08 | 2018-09-21 | 行政院原子能委員會核能研究所 | Drawing method and structure of patterns for low-level radioactive waste disposal container |
| CN107990612B (en) * | 2017-12-05 | 2020-06-30 | 哈尔滨工业大学 | High-performance bamboo fiber composite ice material and preparation method thereof |
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| KR100295574B1 (en) * | 1997-01-27 | 2001-10-24 | 이병걸 | Fiber resin composite member composition and manufacturing method thereof |
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