CN101139174A - Fibre composite phosphor aluminate cement and method for preparing slurry and concrete - Google Patents
Fibre composite phosphor aluminate cement and method for preparing slurry and concrete Download PDFInfo
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- CN101139174A CN101139174A CNA2007100753858A CN200710075385A CN101139174A CN 101139174 A CN101139174 A CN 101139174A CN A2007100753858 A CNA2007100753858 A CN A2007100753858A CN 200710075385 A CN200710075385 A CN 200710075385A CN 101139174 A CN101139174 A CN 101139174A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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Abstract
The present invention discloses a fiber composite phosphorus aluminate cement and preparation method for slurry and concrete. The fiber composite phosphorus aluminate cement is mainly composed of the phosphorus aluminate cement and the fiber and the weight percentage of the phosphorus aluminate cement ranges from 95.00 to 99.96, and the weight percentage of the fiber ranges from 0.04 to 5.00. Compared with the prior art, the fracture properties, impact resistance, mechanical properties such as anti-permeability, anti-shearing, etc., of the fiber composite phosphorus aluminate cement concrete of the present invention are obviously improved.
Description
[technical field]
The invention belongs to field of inorganic materials, compound gelling material and the slurry and the concrete preparation method of fiber that particularly can hydration and hardening.
[background technology]
Portland cement concrete causes structural damage because the textural defect of material self easily produces the crack under the effect of external force.The problem of big, the easy to crack and shock resistance difference of the fragility that exists at general concrete material, the various countries scholar launches to improve the research of concrete material flexible one after another.Mainly contain ultrafine powder toughening technology, fiber reinforced technology and add macromolecular compound technology etc.Because there is easy aged drawback in macromolecular compound, and is more active aspect fiber reinforced concrete research.
Fibrous concrete is to be matrix with cement paste, mortar or concrete, the cement-base composite material of being formed as strongthener with discrete staple fibre or successive macrofiber.Weight and volume size according to institute's adding of fiber in the unit volume concrete can also be divided into high volume and low-dosage fibrous concrete.Since the 1950's, many in the world industrially developed country have obtained tangible achievement about the research of fibrous concrete, comprising: Steel Fiber Reinforced Concrete, glass reinforced concrete glass, polypropylene fiber concrete and carbon fiber reinforced concrete etc.Fibrous concrete research and the substantial progress of using have benefited from the breakthrough of synthon technology.Particularly nearest two during the last ten years, is that the technology developed country development and production of representative go out a series of monofilament synthon that can mix in the middle of the concrete with the U.S., as: modified polypropene, nylon, polyester, polyethylene etc.Yet still be confined to traditional silicate cement and certain fiber composite at present both at home and abroad, this is to improving the anti-contraction of cement concrete, cracking resistance, impervious, mechanical properties such as shock resistance have certain effect, still, because the high alkalinity of silicate cement, some fiber can be corroded and quality descends, as glass fibre, and slurry and fiber interface adhesive property are relatively poor.Portland cement concrete (PCC) tensile strength only is 1/8 to 1/16 of ultimate compression strength, and concrete label is high more, and this ratio is more little.Concrete elongation limit is minimum, only is 0.005-0.05.The 1/10-1/20 that has only the elongation limit of plastics.Therefore in tension or be subjected to the non-deformability when curved very poor, presenting brittle rupture, also is that poor toughness, energy-to-break are low, and its shock resistance is also lower accordingly.And the silicate cement slurry body is early low by force.These have all caused the limitation of silicate cement and concrete intrinsic performance and fiber composite.In addition, the cement concrete that contains fiber for building, great majority all are that required fiber is mixed at the scene when the preparation concrete, and this is stable unfavorable to concrete quality.As hard brittle material, fiber Portland cement concrete (PCC) and goods thereof can't satisfy the requirement of some special occasions, have also restricted the application of cement material.Thereby the needs that to develop a kind of high performance fibre composite phosphor aluminate cement be modern project.
[summary of the invention]
The technical problem to be solved in the present invention provides a kind of cement slurry and the fiber consistency is good, and bonding interface is good, and the finished product are anti-to be shunk, and cracking resistance is impervious, the fibre composite phosphor aluminate cement of good mechanical properties such as shock resistance.It is a kind of by this kind fibre composite phosphor aluminate cement slurry and concrete preparation method that the present invention also will provide.
Technical scheme of the present invention is, a kind of fibre composite phosphor aluminate cement, and mainly by phosphor aluminate cement and fibrous, the weight part of its component is:
Phosphor aluminate cement 95.00-99.96;
Fiber 0.04-5.00.
Above-described fibre composite phosphor aluminate cement, the fiber that is adopted can be polyester fibers, and the weight part of its component is:
Phosphor aluminate cement 96.00-98.00;
Polyester fiber 2.00-4.00.
Above-described fibre composite phosphor aluminate cement, the fiber that is adopted also can be glass fibre, and the weight part of its component is:
Phosphor aluminate cement 97.00-99.00;
Glass fibre 1.00-3.00.
Above-described fibre composite phosphor aluminate cement, the fiber that is adopted can also be carbon fibers, and the weight part of its component is:
Phosphor aluminate cement 99.00-99.96;
Carbon fiber 0.04-1.00
A kind of preparation method of fibre composite phosphor aluminate cement slurry is characterized in, according to the proportioning of above-mentioned fibre composite phosphor aluminate cement phosphor aluminate cement, fiber, an amount of sand, an amount of water is mixed; The pH value of cement slurry is controlled in the scope of 10.5-11.8.
The preparation method of above-described fibre composite phosphor aluminate cement slurry, fiber can be joined stir in the cement of the corresponding proportion that mixes and an amount of sand after, add the water mixing and stirring of suitable proportion again.
The preparation method of above-described fibre composite phosphor aluminate cement slurry, also fiber can be joined equably in the cement in the stirring do mix after, add an amount of sand and water mixing and stirring more respectively.
The preparation method of above-described fibre composite phosphor aluminate cement slurry, fiber can also be added in an amount of water add the cement mixing of corresponding proportion again after mixing after, add an amount of sand more in succession and mix and stir.
The concrete preparation method of a kind of fibre composite phosphor aluminate cement, be characterized in, phosphor aluminate cement, fiber, an amount of sand, an amount of water are mixed an amount of building stone when mixing, or after phosphor aluminate cement, fiber, an amount of sand, an amount of water mix, mix an amount of building stone and an amount of water mixes.
Sand-cement slurry or concrete are hard brittle materials, if mix a certain amount of finely disseminated fiber therein, can stop fissured generation or expansion, the toughness of strongthener, thereby the anti-contraction that improves material, and cracking resistance, impervious, mechanical properties such as shock resistance.Phosphor aluminate cement has the advantage of early strong, high-strength and longterm strength steady growth, and it is the ideal gelling material of making fibrocement.Group in the phosphor aluminate cement hydrated product surface tissue can with multiple the moon, positively charged ion or ionic group combination, so at cement with after fiber combines, its the two surface energy produces good physics (machinery), physical chemistry, or even Chemical bond, thereby form the interface structure of good cement stone and fiber and the three-dimensional net structure in the cement slurry, improved the cracking resistance of cement concrete significantly, the anti-contraction, impervious with and weather resistance.And the low alkalinity of phosphor aluminate cement can not corroded the fiber that is compounded in the cement in the slurry solution environmental.The physical chemistry advantage that this gives on the fiber phosphor aluminate cement intrinsic makes it be better than existing other hydraulic cementing materials both at home and abroad on performance.
Fiber aluminophosphates complex cement of the present invention is low alkali complex cement, and hydrated product in the phosphor aluminate cement slurry and fiber interface have good mechanical bond and chemical compatibility, and to multiple metal, adaptability nonmetal and organic synthetic fibers is strong.The fiber source of fibre composite phosphor aluminate cement of the present invention is extensive, can be various metals, and nonmetal inorganic fibre and organic synthetic fibers are as steel fiber, glass fibre, xylon, vegetable fibre, carbon fiber etc.; Can also adopt synthetic organic fibre, as polyethylene, polypropylene, polyacrylamide, polyacrylonitrile, trevira etc.Fibre composite phosphor aluminate cement Fracture energy of concrete of the present invention, shock resistance, impervious, performances such as VShi hardness and mechanical strength are compared with prior art and are had clear improvement.
[description of drawings]
Fig. 1 is electronic scanning pattern (SEM) figure of fibre composite phosphor aluminate cement embodiment 1 trevira of the present invention and phosphor aluminate cement slurry.
Fig. 2 is electronic scanning pattern (SEM) figure of fibre composite phosphor aluminate cement embodiment 2 glass fibre of the present invention and phosphor aluminate cement slurry.
Fig. 3 is electronic scanning pattern (SEM) figure of fibre composite phosphor aluminate cement embodiment 1 carbon fiber of the present invention and phosphor aluminate cement slurry.
[embodiment]
The raw material sources of fibre composite phosphor aluminate cement of the present invention are in commodity phosphor aluminate cement and extensive stock metal or nonmetal, inorganic or organic fibre.As, steel fiber, glass fibre, xylon, vegetable fibre, carbon fiber etc. can also adopt synthetic organic fibre, as polyethylene, and polypropylene, polyacrylamide, polyacrylonitrile, trevira etc.Gathering materials that fibre composite phosphor aluminate cement concrete of the present invention uses is common building sand and building stone.
The preparation method of fibre composite phosphor aluminate cement slurry of the present invention:
The dispersiveness of fiber in cement matrix is crucial.In the present invention, the fiber mode of mixing can have following three kinds:
1. interior the doing of cement that the fiber of designed proportional is joined in the stirring equably mixed.The sand and the water that add corresponding proportion during use more respectively mix stirring;
The fiber of designed proportional join stir in the cement, sand of the corresponding proportion that mixes after, the water that adds suitable proportion again mixes and stirs;
3. the fiber of designed proportional is added in a certain proportion of water the cement mixing that adds corresponding proportion after mixing again, the sand that adds suitable proportion after more in succession mixes and stirs.
Embodiment 1, trevira aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 97.20;
(fiber is long: 6mm): 2.80 for trevira.
Embodiment 2, glass fibre aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 98.00;
(fiber is long: 6mm): 2.00 for glass fibre.
Embodiment 3, carbon fiber aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 99.50;
Carbon fiber: 0.50.
In embodiment 1 to 3, interior the doing of phosphor aluminate cement that the fiber of designed proportional joins in the stirring equably mixed formation aluminophosphates complex cement product.The sand and the water that add corresponding proportion during use again in aluminophosphates complex cement product mix stirring formation mortar.Table 1 is that fiber aluminophosphates complex cement is starched the main mechanical property under normal curing only.
Table 1. fiber aluminophosphates complex cement is starched only
1Main mechanical property/the MPa of (normal curing)
| Sample | Ultimate compression strength/MPa | Cleavage strength/MPa hydration age/d | |||
| Hydration age/d | |||||
| 1 | 28 | 1 | 28 | ||
| Embodiment 1 embodiment 2 embodiment 3 | (mixing trevira) (mixing glass fibre) (carbon dope fiber) | 80.1 78.9 71.4 | 122.4 120.3 120.0 | 8.1 7.6 7.2 | 9.8 9.5 8.9 |
| Comparative Examples 1 2Comparative Examples 2 3 | 31.8 68.3 | 100.7 113.2 | 2.8 6.1 | 6.2 7.1 | |
1. starch standard consistency only: the test point decline degree of depth: 30mm
2. Comparative Examples 1: the clean slurry of corresponding silicate cement (52.5 grades) that is compounded with trevira.
3. Comparative Examples 2: the phosphor aluminate cement of conjugated fibre is not starched only.
Embodiment 4, trevira aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 97.20;
(fiber is long: 6mm): 2.80 for trevira;
(sand) gathers materials: 100.
The preparation process of complex cement slurry:
(fiber is long: after trevira 6mm) joined equably and stirs 5 minutes in the sand of the 97.20 gram phosphor aluminate cements that mix and 100 grams, the water that add 44.71 grams again mixed stirrings 3 minutes, carry out the normal moulding of mortar product 2.80 grams.The pH value of the new sand cutting slurry of trevira aluminophosphates complex cement maintains 11.2.Relevant mechanical properties sees Table 2.
Embodiment 5, glass fibre aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 98.00;
(fiber is long: 6mm): 2.00 for glass fibre;
(sand) gathers materials: 300.
The preparation process of complex cement slurry:
(fiber is long: 6mm) join the gram of 98 in stirring cement equably after interior dried mixed 5 minutes, the normal moulding of mortar product is carried out in 300 gram sand and 45.08 gram water mixing stirrings again the glass fibre of 2.00 grams.The pH value of the new sand cutting slurry of glass fibre aluminophosphates complex cement is 10.7.Corresponding mechanical property: see Table 2.
Embodiment 6, carbon fiber aluminophosphates complex cement (weight part of its component is):
52.5 level phosphor aluminate cement: 99.50;
Carbon fiber: 0.50;
(sand) gathers materials: 200
The preparation process of complex cement slurry:
The carbon fiber of 0.50 gram is joined mix in the water of 45.77 grams and add 99.50 gram cement after 5 minutes, remix 5 minutes, and then the sand that add 200 grams mix and stirred 3 minutes, carry out the normal moulding of mortar product.The pH value of the new sand cutting slurry of the compound phosphor aluminate cement of carbon fiber is 11.8.Corresponding mechanical property: see Table 2.
Embodiment 7:
The concrete of fibre composite phosphor aluminate cement, by weight ratio, by 35 parts of the trevira aluminophosphates complex cements among the embodiment 4, building medium sand and 65 parts in building stone (0.5cm-2.5cm) and an amount of water mix.Corresponding mechanical property: see Table 3.
The salient features of table 2 fiber aluminophosphates composite cement mortar normal curing 28d
| Sample | Mortar specimen folding strength/MPa | Mortar specimen shearing resistance/MPa | Mortar specimen resistance to impact shock/10 -3·MPa | The mortar specimen impermeability (1.5MPa pressure, after 14 hours, 1.6MPa pressure action 16 hours) |
| Embodiment 4 embodiment 5 embodiment 6 Comparative Examples 1 Comparative Examples 2 | 11.05 10.02 11.31 9.25 9.51 | 3.08 3.17 3.47 2.63 2.36 | 12.87· 12.16· 10.47· 7.19 7.54 | Impermeable impermeable 1.5MPa pressure, 12 hours infiltration 1.5MPa pressure did not ooze in 14 hours, permeated in 10 hours continue back 1.6MPa pressure |
Comparative Examples 1: the corresponding silicate cement (52.5 grades) that is compounded with trevira
Comparative Examples 2: the phosphor aluminate cement mortar of conjugated fibre not, promptly plain mortar.
28 days salient features of table 3 trevira aluminophosphates complex cement concrete standard maintenance
| Sample | Energy-to-break/KJ | Cleavage strength/MPa | ||
| 1 day | 28 days | 1 day | 28 days | |
| Embodiment 7 Comparative Examples 3 Comparative Examples 4 | 26.7 9.7 21.8 | 140.5 84.8 90.8 | 3.12 0.87 2.03 | 6.45 4.04 4.65 |
Comparative Examples 3: the corresponding Portland cement concrete (PCC) C50 that is compounded with trevira
Comparative Examples 4: not the phosphor aluminate cement concrete C50 of conjugated fibre, i.e. plain concrete.
Fig. 1 to Fig. 3 is different fibers and phosphor aluminate cement slurry agglutinating electronic scanning pattern.As shown in Figure 1 to Figure 3, fiber in the fibre composite phosphor aluminate cement of the present invention is fine with phosphor aluminate cement mortar bonding situation, fiber has played a kind of effect of bridge at the interface in slurry particles, so behind the conjugated fibre, the intergranular adhesive power of slurry aquation is strengthened, and in aquation and later drying process, stop cement slurry to shrink and the formation and the expansion of crackle, thereby can improve fibre composite phosphor aluminate cement mortar and concrete mechanical property effectively.
According to table 1, the embodiment of table 2 and table 3 and Comparative Examples as seen, the main Mechanical of fibre composite phosphor aluminate cement mortar of the present invention is compared with prior art and is improved a lot, the raising of especially early stage mechanical property is fairly obvious:
1. by table 1, starch the 1d and the 28d cleavage strength of sample aquation only, embodiment 1-3 has improved 157.1%-189% and 43.6%-58.1% respectively than Comparative Examples 1, has improved 18.0%-32.8% and 25.4%-38.0% respectively than Comparative Examples 2.This shows that the fiber aluminophosphates complex cement of being invented improves a lot than existing like product cleavage strength, this shows that the complex cement of being invented has very strong crack resistance.
2. by folding strength (MPa) result of table 2 as seen: at 28d during the length of time, the folding strength of embodiment 4,5 and 6 mortar specimen than the raising of plain mortar 5.36-18.93, than the raising of the corresponding silicate cement that is compounded with trevira 8.32-22.27.
2. resistance to impact shock (MPa): at 28d during the length of time, the resistance to impact shock of embodiment 4,5 and 6 mortar specimen than the raising of plain mortar 38.9-70.7; Than the raising of the corresponding silicate cement that is compounded with trevira 45.6-79.0
3. anti-permeability performance (time of water infiltration test specimen under constant pressure): according to JC474-1999, the impermeability of polyester fiber and glass fibre phosphor aluminate cement mortar specimen pretends impermeable with 16 hours times than plain mortar height at 1.6MPa hydraulic pressure; And Comparative Examples 2 test specimens did not ooze under 1.5MPa pressure in 14 hours, continue after 1.6MPa pressure just permeated in 10 hours, the test specimen of Comparative Examples 1 is at 1.5MPa pressure, infiltration in 12 hours.
4. according to table 3 as seen, the concrete salient features of the compound phosphor aluminate cement of trevira of the present invention is compared with prior art, also improves a lot:
(1) energy-to-break (KJ): trevira phosphor aluminate cement Fracture energy of concrete improved than Comparative Examples 3 plain concretes and had improved 54.2 in 22.5%, 28 day in 1 day; Be compounded with than Comparative Examples 41 day of corresponding Portland cement concrete (PCC) of trevira and 28 days energy-to-break have improved 175.3 and 65.7 respectively.
(2) cleavage strength: the cleavage strength of trevira phosphor aluminate cement concrete 1 day and 28 days than the same period Comparative Examples 3 plain concretes improved 53.7 and 38.7 respectively; Than the same period Comparative Examples 4 be compounded with trevira corresponding Portland cement concrete (PCC) improved 258.6 and 59.3 respectively.
Microfracture can appear in the concrete forming process, but because fiber evenly is randomly distributed in inside concrete with quantity bigger in the unit volume, so microfracture must meet with stopping of fiber in the process of development, consumed energy, reaches the cracking resistance effect thereby block fissured development.Reinforcing bar is the same with adding in the civil engineering work, and the adding of fiber is just as mixing fiber " muscle " in concrete.These fibers " muscle " have suppressed the process of concrete cracking, have improved concrete fracture toughness property.Group in the phosphor aluminate cement hydrated product surface tissue can with multiple the moon, positively charged ion or ionic group combination, so at cement with after fiber combines, its the two surface energy produces good physics (machinery), physical chemistry, or even Chemical bond, thereby form the interface structure of good cement stone and fiber and the three-dimensional net structure in the cement slurry, improved the cracking resistance of cement concrete significantly, the anti-contraction, impervious with and weather resistance, so phosphor aluminate cement has better cohesive force than silicate cement in the Comparative Examples and fiber.High-strength and the morning of phosphor aluminate cement slurry intrinsic is strong, makes fiber phosphor aluminate cement of the present invention and goods thereof have excellent mechanical property.
Claims (9)
1. a fibre composite phosphor aluminate cement is characterized in that, mainly by phosphor aluminate cement and fibrous, the weight part of its component is:
Phosphor aluminate cement 95.00-99.96;
Fiber 0.04-5.00.
2. fibre composite phosphor aluminate cement according to claim 1 is characterized in that described fiber is a polyester fiber, and the weight part of its main ingredient is:
Phosphor aluminate cement 96.00-98.00;
Polyester fiber 2.00-4.00.
3. fibre composite phosphor aluminate cement according to claim 1 is characterized in that described fiber is a glass fibre, and the weight part of its main ingredient is:
Phosphor aluminate cement 97.00-99.00;
Glass fibre 1.00-3.00.
4. fibre composite phosphor aluminate cement according to claim 1 is characterized in that described fiber is a carbon fiber, and the weight part of its main ingredient is:
Phosphor aluminate cement 99.00-99.96;
Carbon fiber 0.04-1.00.
5. the preparation method of a fibre composite phosphor aluminate cement slurry is characterized in that, according to the proportioning of claim 1 fibre composite phosphor aluminate cement phosphor aluminate cement, fiber, an amount of sand, an amount of water is mixed; The pH value of cement slurry is controlled in the scope of 10.5-11.8.
6. the preparation method of fibre composite phosphor aluminate cement slurry according to claim 5 is characterized in that, with fiber join stir in the cement of the corresponding proportion that mixes and an amount of sand after, add the water mixing and stirring of suitable proportion again.
7. the preparation method of fibre composite phosphor aluminate cement slurry according to claim 5 is characterized in that, with fiber join equably do in the cement in the stirring mix after, add an amount of sand and water mixing and stirring more respectively.
8. the preparation method of fibre composite phosphor aluminate cement slurry according to claim 5 is characterized in that, with fiber add in an amount of water add the cement mixing of corresponding proportion again after mixing after, add an amount of sand mixing and stirring more in succession.
9. concrete preparation method of fibre composite phosphor aluminate cement, it is characterized in that, by claim 5 phosphor aluminate cement, fiber, an amount of sand, an amount of water are mixed an amount of building stone when mixing, or after phosphor aluminate cement, fiber, an amount of sand, an amount of water mix, mix an amount of building stone and an amount of water mixes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503200A (en) * | 2011-12-19 | 2012-06-20 | 邢锋 | Fiber composite phosphoaluminate cement and slurry thereof and concrete preparation method |
| CN107117840A (en) * | 2017-05-16 | 2017-09-01 | 葛洲坝石门特种水泥有限公司 | The phosphor aluminate cement and its production method of a kind of utilization industrial residue production |
| CN114988807A (en) * | 2022-06-13 | 2022-09-02 | 中建四局贵州投资建设有限公司 | Fiber cement and preparation method and application thereof |
-
2007
- 2007-08-01 CN CNA2007100753858A patent/CN101139174A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503200A (en) * | 2011-12-19 | 2012-06-20 | 邢锋 | Fiber composite phosphoaluminate cement and slurry thereof and concrete preparation method |
| CN107117840A (en) * | 2017-05-16 | 2017-09-01 | 葛洲坝石门特种水泥有限公司 | The phosphor aluminate cement and its production method of a kind of utilization industrial residue production |
| CN107117840B (en) * | 2017-05-16 | 2019-12-06 | 葛洲坝石门特种水泥有限公司 | Phosphoaluminate cement produced by using industrial waste residues and production method thereof |
| CN114988807A (en) * | 2022-06-13 | 2022-09-02 | 中建四局贵州投资建设有限公司 | Fiber cement and preparation method and application thereof |
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