CN104478324A - High-temperature-resisting geopolymer based reinforcing and repairing mortar as well as preparation method and application of high-temperature-resisting geopolymer based reinforcing and repairing mortar - Google Patents
High-temperature-resisting geopolymer based reinforcing and repairing mortar as well as preparation method and application of high-temperature-resisting geopolymer based reinforcing and repairing mortar Download PDFInfo
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Abstract
The invention discloses high-temperature-resisting geopolymer based reinforcing and repairing mortar as well as a preparation method and application of the high-temperature-resisting geopolymer based reinforcing and repairing mortar. The preparation method comprises the following steps: mixing metakaolin and coal ash solid powder, and chopped fibers; pouring a potassium water glass solution; stirring and adding sand; and stirring the mixture again to obtain a product. The high-temperature-resisting geopolymer based reinforcing and repairing mortar comprises the following components in parts by mass: 100 parts of metakaolin and coal ash solid powder, 90-130 parts of the potassium water glass solution, 300-500 parts of sand and 0-2 parts of chopped fibers; and the solid powder is composed of the following components in percentage by mass: 50%-80% of metakaolin and 20%-50% of coal ash. The material has good mechanical properties at room temperature and high temperature, and has the stronger capability of being bound with common cement mortar, concrete and fiber grids and the like; the room-temperature shrinkage is small and is close to a concrete thermal expansion coefficient; and the reinforcing and repairing mortar has early strength, is not easy to crack, has good heat insulation performance, is environmentally friendly, and is suitable for being used as a concrete structure.
Description
Technical field
The invention belongs to building material technical field, particularly one resistant to elevated temperatures ground polymers base reinforcing and repairing mortar and preparation method thereof and application.
Background technology
Current China has large quantities of building, road and bridge structure etc. to carry out repairing or reinforcing due to aging needs, and some new concrete structures there will be the defects such as hole, honeycomb, pitted skin unavoidably in casting process simultaneously, also need to repair.Traditional sand-cement slurry is the most frequently used repairing and reinforcing material, but the cohesive strength of sand-cement slurry and concrete surface is lower, and easy dry shrinkage and cracking.For improving the performance of traditional cement mortar, numerous investigator proposes to add the compositions such as Redispersible emulsion powder, swelling agent, water reducer, wood fibre in the making processes of traditional cement mortar.These innovative approachs can improve the mechanical property of sand-cement slurry to a certain extent, and reduce the drying shrinkage of sand-cement slurry, but these repairing and reinforcing molding sand slurries improved to remain with cement be major gelled material.In cement production process, need more than limestone calcination to 1000 DEG C, energy consumption is higher, and can discharge a large amount of carbonic acid gas, and therefore manufacture of cement is considered to one of principal element causing Global warming.Along with going from bad to worse of environment for human survival, seek the cement replacement of energy-conserving and environment-protective, development non-cement-based mortar is the problem jointly paid close attention to of people in recent years.
Summary of the invention
The object of the present invention is to provide a kind of mechanical property and the excellent energy saving and environment friendly mortar of high-temperature behavior, i.e. polymers mortar, be used for concrete structure repairing or reinforcing with alternative cement-based mortar.Resistant to elevated temperatures ground polymers base reinforcing and repairing mortar is for inorganic coagulation material with ground polymers.
Technical scheme of the present invention is as follows.
The preparation method of a kind of resistant to elevated temperatures ground polymers base reinforcing and repairing mortar, comprise the following steps: metakaolin and flyash pressed powder, chopped strand are mixed, then the potash water glass solution of cooling is added, hand operated mixing, then automatic stirring on cement mortar mixer, add sand again, automatic stirring, obtained ground polymers base reinforcing and repairing mortar;
Described metakaolin and flyash pressed powder, potash water glass solution, sand and chopped strand as follows by its add-on of mass parts:
In aforesaid method, the described hand operated mixing time is 2-3 minute; The churning time adding the automatic stirring before sand is 2-3 minute; Adding the automatic stirring time after sand is 8-15 minute.
In aforesaid method, in metakaolin and flyash pressed powder, the mass percent of metakaolin accounts for 50% ~ 80% of pressed powder total mass, and the mass percent of flyash is 20% ~ 50%.
In aforesaid method, described flyash is Class F fly ash.
In aforesaid method, in described potash water glass solution, potash water glass modulus is 1.0 ~ 1.4, and mass concentration is 35% ~ 40%, and potash water glass solution naturally cooling.The preparation of potash water glass solution by adding appropriate potassium hydroxide solid in industrial potash water glass solution (potassium silicate solution), water realizes.
In aforesaid method, described sand is natural river sand, fineness modulus 1.6 ~ 3.0.
In aforesaid method, described chopped strand is chopped carbon fiber or the basalt fibre of length 3 ~ 6mm.
The ground polymers mortar of gained of the present invention is applied to reinforcing or mending concrete structural member.
Principle of the present invention is: metakaolin and flyash are the materials being rich in sial, can be polymerized the inorganic coagulation material with the network-like bonded structure of space three-dimensional being formed and be made up of silicon-oxy tetrahedron and aluminum-oxygen tetrahedron, i.e. polymers under the exciting of potash water glass.Ground polymers there is good mechanical property, can by sand grains parcel and cementing, after sclerosis formation one can cooperative entirety.Adopting the mixture of higher territory and flyash to prepare ground oligomer gel material as starting material, is the advantage that simultaneously make use of higher territory and flyash.The normal temperature performance of pure metakaolin ground polymers is good, but easy to crack under high temperature, and strength degradation is fast; If pure fly ash ground polymers adopts normal temperature maintenance, its normal temperature strength is on the low side, but high-temperature behavior is better.In addition, flyash is spheroidal particle, and specific surface area is little, it add the consumption that can reduce water, and improve ground polymers compactness.Therefore, the ground oligomer gel material be mixed with by this bi-material has good normal temperature and high-temperature behavior simultaneously.The object of mixing chopped carbon fiber or basalt fibre is the toughness strengthening ground polymers mortar, reduces contraction and the cracking of ground polymers mortar.
Relative to prior art, tool of the present invention has the following advantages and beneficial effect:
The ground polymers mortar adopting the inventive method to prepare all has good mechanical property at ambient and elevated temperatures, especially have stronger viscosifying power with conventional cement mortar, concrete surface and fiber mesh etc., normal temperature shrinks little, early strong, be not easy cracking, and heat-proof quality is good.In addition, owing to adopting ground polymers to replace conventional cement as inorganic coagulation material, the present invention has good environmental benefit, and its production energy consumption is low, and carbon dioxide releasing amount is little, and can make full use of trade waste.The present invention is especially suitable for use as the reinforcing and repairing mortar of concrete structure.
Accompanying drawing explanation
Fig. 1 is the cohesive strength comparison diagram after ground polymers mortar and sand-cement slurry and new and old sand-cement slurry high temperature;
Fig. 2 is the cohesive strength comparison diagram after ground polymers mortar and concrete and sand-cement slurry and concrete high temperature.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1 ~ 2
(1) by the mass ratio of 1:0.29:0.29, take industrial potash water glass solution (modulus be 2.4, mass concentration be 40%), hydroxide flake potassium (purity is 90%) and tap water respectively some, hydroxide flake potassium and water are joined in potash water glass solution, recall the potash water glass solution that modulus is 1.0, mass concentration is still 40%, then leave standstill and be cooled to room temperature.
(2) by the formula rate of embodiment in table 11, embodiment 2, take Shanxi metakaolin finished product, Class F fly ash and chopped carbon fiber respectively, put into container and they are mixed, and stir gently.
(3) by the formula rate of embodiment in table 11, embodiment 2, the good modulus of step (1) adjusted is taken and the potash water glass solution of cooling.
(4) the potash water glass solution of step (3) is poured in the mixture of step (2), hand operated mixing 3 minutes, then automatic stirring 3 minutes on cement mortar mixer, forms ground polymers slurry.
(5) by the formula rate of embodiment in table 11, embodiment 2, in the ground polymers slurry that step (4) is formed, medium sand is added, then automatic stirring 10 minutes on cement mortar mixer, obtained ground polymers mortar.
(6) ground polymers mortar prepared by step (5) is poured into 160mm (length) × 40mm (wide) × three die for molding of 40mm (height), jolt ramming, then coating film, is placed into constant-temp. and-moisture maintenance Plays maintenance 7 days.
(7) according to the regulation of GB/T17671-1999 " Test method for strength of hydraulic cement mortar ", universal testing machine is adopted to carry out anti-folding under normal temperature and intensity test to part test specimen prepared by step (6).
(8) adopt intelligent High Temperature Furnaces Heating Apparatus, another part test specimen prepared by step (6) is carried out intensification heating, temperature rise rate is 5 DEG C/min; After temperature rises to preset temperature (100,300,500 and 700 DEG C) respectively, keep constant temperature 60min, then stop heating, naturally cool to room temperature, then according to the method that step (7) is similar, anti-folding and intensity test are carried out to the test specimen after pyroprocessing.The test result of step (7) and step (8) is as shown in table 2.
(9) be the mechanical property of comparatively polymers mortar and conventional cement mortar, adopt R32.5 level P.S.B. Portland blast furnace slag cement to prepare conventional cement mortar and carry out simultaneous test, the mass ratio of each component of sand-cement slurry is water: cement: sand=0.4:1:2.4.According to the method that step (6) ~ (8) are similar, make conventional cement mortar test specimen, the anti-folding of sand-cement slurry under then carrying out normal temperature and after high temperature and intensity test, test result is as shown in table 2.
The ground polymers cement mortar ratio of table 1 embodiment 1 ~ 2
| Test piece number | Metakaolin (g) | Flyash (g) | Potash water glass (g) | Sand (g) | Chopped carbon fiber (g) |
| Embodiment 1 | 50 | 50 | 91 | 310 | 2 |
| Embodiment 2 | 50 | 50 | 107 | 428 | 0 |
Anti-folding, the intensity test result of table 2 embodiment 1 ~ 2 ground polymers mortar
Embodiment 3 ~ 4
(1) in potash water glass solution, add appropriate hydroxide flake potassium and water, by the potash water glass modulus modulation potash water glass of embodiment in table 33, embodiment 4, then leave standstill and be cooled to room temperature.
(2) by the formula rate of embodiment in table 33, embodiment 4, take Shanxi metakaolin finished product and Class F fly ash respectively, put into container and they are mixed, and stir gently.
(3) by the formula rate of embodiment in table 33, embodiment 4, the good modulus of step (1) adjusted is taken and the potash water glass solution of cooling.
(4) the potash water glass solution of step (3) is poured in the mixture of step (2), hand operated mixing 3 minutes, then automatic stirring 3 minutes on cement mortar mixer, forms ground polymers slurry.
(5) by the formula rate of embodiment in table 33, embodiment 4, in the ground polymers slurry that step (4) is formed, medium sand is added, then automatic stirring 10 minutes on cement mortar mixer, obtained ground polymers mortar.
(6) ground polymers mortar step (5) prepared injects 160mm (length) × 40mm (wide) × three die for molding of 40mm (height), jolt ramming, then coating film, is placed into constant-temp. and-moisture maintenance Plays maintenance 7 days.
(7) according to the regulation of GB/T17671-1999 " Test method for strength of hydraulic cement mortar ", adopt universal testing machine to carry out anti-folding under normal temperature and intensity test to test specimen prepared by step (6), test result is as shown in table 3.
The proportioning of table 3 embodiment 3 ~ 4 ground polymers mortar and the anti-folding of normal temperature and ultimate compression strength
Embodiment 5 ~ 15
(1) according to the ground polymers cement mortar ratio of embodiment in table 45 ~ 15, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(2) above-mentioned ground polymers mortar is poured into perisporium to scribble in little " 8 " font die trial of releasing agent, is then placed on mortar shaking table and vibrates 4 minutes, re-cover film, be placed into constant-temp. and-moisture maintenance Plays maintenance 7 days and take out afterwards and dry.
(3) according to the regulation of DL/T 5126-2001 " polymer-modified cement mortar testing regulation ", adopt universal testing machine to stretch to test specimen, test ground polymers mortar tensile strength, test result is in table 4.
(4) be the tensile strength of comparatively polymers mortar and conventional cement mortar, adopt P.O.32.5 ordinary Portland cement to prepare conventional cement mortar and carry out simultaneous test, the mass ratio of each component of sand-cement slurry is water: cement: sand=0.45:1:3.According to the method that step (2) ~ (3) are similar, make conventional cement mortar test specimen, then test the tensile strength of conventional cement mortar, test result is also listed in table 4.
The proportioning of table 4 embodiment 5 ~ 15 ground polymers mortar and tensile strength
Embodiment 16 ~ 17
(1) according to the ground polymers cement mortar ratio of embodiment in table 5 16 ~ 17, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(2) above-mentioned ground polymers mortar is poured into perisporium to scribble in little " 8 " font die trial of releasing agent, is then placed on mortar shaking table and vibrates 4 minutes, re-cover film, be placed into constant-temp. and-moisture maintenance Plays maintenance 7 days and take out afterwards and dry.
(3) adopt intelligent High Temperature Furnaces Heating Apparatus, test specimen is carried out intensification heating, temperature rise rate is 5 DEG C/min; After temperature rises to preset temperature (100,300,500 and 700 DEG C) respectively, keep constant temperature 60min, then stop heating, naturally cool to room temperature;
(4) according to the regulation of DL/T 5126-2001 " polymer-modified cement mortar testing regulation ", adopt universal testing machine to stretch to test specimen, tensile strength after the high temperature of test ground polymers mortar, test result is as shown in table 5.
(5) be comparatively polymers mortar and conventional cement mortar high temperature after tensile strength, adopt P.O.32.5 ordinary Portland cement to prepare conventional cement mortar and carry out simultaneous test, the mass ratio of each component of sand-cement slurry is water: cement: sand=0.45:1:3.According to the method that step (2) ~ (4) are similar, make conventional cement mortar test specimen, be then heated to 300 DEG C and 700 DEG C respectively, cool after constant temperature 60min, tensile strength after the high temperature of test conventional cement mortar, test result is also listed in table 5.
Tensile strength after table 5 embodiment 16 ~ 17 ground polymers cement mortar ratio and high temperature
Embodiment 18
(1) adopt P.O.32.5 ordinary Portland cement and high-efficiency water-reducing agent of poly-carboxylic acid preparation high-strength cement mortar, the mass ratio of each component of sand-cement slurry is water: cement: sand: water reducer=0.31:1:3:0.018;
(2) sand-cement slurry step (1) prepared injects little " 8 " font die trial that middle part has plastic tab to separate, form two portions that are symmetrical, approximate " O " type, then on mortar shaking table, 4 minutes are vibrated, re-cover film, be placed in the maintenance of constant-temp. and-moisture maintenance Plays to take out after 7 days, for subsequent use as old cement mortar block after 21 days in indoor placement.
(3) the grout thin layer at (smallest cross-sectional place) on the old cement mortar block adhesive surface of " O " type is polished off with electric angle grinder, then old cement mortar block is placed in a semicircle of little " 8 " font die trial, and removes the plastic tab in the middle part of die trial.
(4) according to the ground polymers cement mortar ratio in table 6, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(5) the ground polymers mortar that step (4) is obtained is poured in another semicircle in little " 8 " font die trial, newly polymers mortar and old sand-cement slurry are bonded together and form entirety; After it is vibrated 4 minutes on mortar shaking table, re-cover film, is placed in constant-temp. and-moisture maintenance maintenance 7 days and takes out afterwards and dry.
(6) according to the regulation of " polymer-modified cement mortar testing regulation " (DL/T 5126-2001), " 8 " font test specimen that the new ground polymers mortar adopting universal testing machine to make step (5) and old sand-cement slurry are bonded to stretches, test ground polymers mortar and conventional cement mortar cohesive strength at normal temperatures.
(7) repeating step (1) ~ (5), make " 8 " font test specimen that newly polymers mortar and old sand-cement slurry are bonded to; Adopt intelligent High Temperature Furnaces Heating Apparatus, test specimen is carried out intensification heating, temperature rise rate is 5 DEG C/min; After temperature rises to preset temperature 100,300,500 and 700 DEG C respectively, keep constant temperature 60min, then stop heating, naturally cool to room temperature; Then according to the step that step (6) is similar, test ground polymers mortar and the cohesive strength of conventional cement mortar after high temperature.Ground polymers mortar and conventional cement mortar at normal temperatures with high temperature after cohesive strength result as shown in Figure 1.
(8) be the tensile bond strength of comparatively polymers mortar and conventional cement mortar, repeating step (1) ~ (3), prepare old cement mortar block and are placed in a semicircle of little " 8 " font die trial; Adopt P.O.32.5 ordinary Portland cement to prepare new sand-cement slurry, the mass ratio of each component of new sand-cement slurry is water: cement: sand=0.45:1:3; New sand-cement slurry is poured in another semicircle in little " 8 " font die trial, new sand-cement slurry and old sand-cement slurry are bonded together and form entirety, then jolt ramming, normal curing is after 28 days, according to the method similar with step (6), (7), the cohesive strength of new and old sand-cement slurry under test normal temperature and after high temperature, result is also drawn in accompanying drawing 1.As can be seen from accompanying drawing 1, cohesive strength between ground polymers mortar and old sand-cement slurry, no matter at normal temperatures or after high temperature, all far above the cohesive strength between new sand-cement slurry and old sand-cement slurry, because this place polymers mortar may be used for the repairing of old cement sand pulp.
The ground polymers cement mortar ratio of table 6 embodiment 18 ~ 21
| Test piece number | Metakaolin | Flyash | Potash water glass | Sand | Chopped carbon fiber |
| Embodiment 18 ~ 21 | 50 | 50 | 107 | 428 | 0 |
Embodiment 19
(1) adopt the rubble of P.O.32.5 ordinary Portland cement, tap water, autochthonous stream sand, particle diameter 5 ~ 20mm and high-efficiency water-reducing agent of poly-carboxylic acid to prepare concrete, the mass ratio of each component is cement: water: sand: stone: water reducer=1:0.31:1.5:2.3:0.018.
(2) concrete mix prepared by step (1) being poured into centre puts in the large Eight characters die trial of the thick timber partition of 25mm, form two concrete samples be separated, then use vibrating head vibration compacting, water seasoning within 7 days, be placed on indoor 21 days for subsequent use as old concrete test block.
(3) the grout thin layer at (smallest cross-sectional place) on old concrete test block adhesive surface that step (2) prepares is polished off with polishing machine, then two concrete blockss are put back in large splayed die trial, remove the timber partition in the middle of die trial, reserve space.
(4) according to the ground polymers cement mortar ratio in table 6, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(5) in the space in the middle part of large splayed die trial ground polymers mortar obtained for step (4) being injected into step (3), the old concrete of both sides is bonded together formed overall; Ground polymers mortar divides three layers to build and plug and pound, and every layer plugs and pounds 30 times; Afterwards, test specimen is placed in indoor, coating film, water seasoning seven days.
(6) according to " epoxy resin mortar technical regulation " (DL/T 5193-2004) and " concrete for hydraulic structure testing regulation " (DL/T 5150-2001), normal temperature tension test is carried out to test specimen prepared by step (5), test ground polymers mortar and concrete normal temperature cohesive strength.
(7) repeating step (1) ~ (5), make the large splayed test specimen that newly polymers mortar and old concrete are bonded to; Adopt intelligent High Temperature Furnaces Heating Apparatus, test specimen is carried out intensification heating, temperature rise rate is 5 DEG C/min; After temperature rises to preset temperature (100,300,500 and 700 DEG C) respectively, keep constant temperature 60min, then stop heating, naturally cool to room temperature; Then according to the method that step (6) is similar, test ground polymers mortar and the tensile bond strength of concrete after high temperature.Ground polymers mortar and concrete at normal temperatures with high temperature after cohesive strength result as shown in Figure 2.As can be seen from Fig., ground polymers mortar and old concrete have good adhesive property, and normal temperature cohesive strength can reach 1.7MPa.
(8) for comparatively polymers mortar and conventional cement mortar bond concrete tensile bond strength, repeating step (1) ~ (3), preparation old concrete test block is also placed in large splayed die trial, and middle part reserves space; Adopt P.O.32.5 ordinary Portland cement to prepare conventional cement mortar, the mass ratio of each component of sand-cement slurry is water: cement: sand=0.45:1:3; Conventional cement mortar is poured in the space in the middle part of large splayed die trial, the old concrete of both sides is bonded together and forms entirety, then jolt ramming, normal curing is after 28 days, according to the method similar with step (6), (7), cohesive strength under test normal temperature and after high temperature between conventional cement mortar and concrete, test result is also drawn in accompanying drawing 2.As can be seen from accompanying drawing 2, cohesive strength between ground polymers mortar and old concrete, no matter at normal temperatures or after high temperature, all far above the cohesive strength between conventional cement mortar and old concrete, because of the alternative conventional cement mortar of this place polymers mortar, for reinforcing or the repairing of concrete structure or component.
Embodiment 20
(1) adopt the rubble of P.O.32.5 ordinary Portland cement, tap water, autochthonous stream sand, particle diameter 5 ~ 20mm to prepare concrete, the mass ratio of each component is cement: water: sand: stone=1:0.49:1.59:3.39.
(2) concrete mix step (1) prepared injects the die trial of 70mm × 100mm × 150mm, jolt ramming, the water seasoning side (face of 100mm × 150mm) that polishing concrete test block two was relative afterwards in 28 days.
(3) according to the ground polymers cement mortar ratio in table 6, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(4) cut the carbon fiber mesh fabric of 60mm (wide) × 615mm (length), the size of mesh opening of grid cloth is 5mm × 5mm.
(5) on concrete side that step (2) is polished, ground polymers mortar prepared by smearing step (3) as primer, thickness 2mm, application area is 60mm × 50mm; One end and the ground polymers mortar primer justified margin of the grid cloth that step (4) is cut, and be pasted on ground polymers mortar primer layer, then use cylinder repeatedly to roll, drive bubble and unnecessary slurries away; Afterwards, on carbon fiber mesh fabric, be coated with the ground polymers mortar that a layer thickness is about 5mm again, use tack ash cutter evenly to plug and pound 30 times, floating mortar surface coating film.Next day, by the other end of same method sticking carbon fiber grid cloth on another side of concrete, then coating film, water seasoning 7 days.
(6) adopt universal testing machine oriented fibre grid cloth, carry out the double shear experiment at concrete-ground polymers mortar-carbon fiber mesh interface, the cohesive strength that test obtains ground polymers mortar and carbon fiber mesh is 0.98MPa.
Embodiment 21
(1) according to the ground polymers cement mortar ratio in table 6, with reference to step (1) ~ (5) in embodiment 1 ~ 2, preparation ground polymers mortar.
(2) above-mentioned ground polymers mortar is injected the die trial of 70mm × 70mm × 20mm, jolt ramming, is placed in the maintenance of constant-temp. and-moisture maintenance Plays and dries after 7 days.
(3) adopt the thermal conductivity of HotDisk testing of equipment ground polymers mortar, test result is 2.1W/ (mK), slightly lower than the thermal conductivity (2.4W/ (mK)) of the conventional cement mortar with batch making and test.
(4) ground polymers mortar step (1) prepared injects the die trial of 5mm × 5mm × 20mm, jolt ramming, be placed in constant-temp. and-moisture maintenance Plays maintenance 7 days, then adopt the thermal expansivity of NETZSCH DIL 402C testing of equipment ground polymers mortar, the test result explicitly mean thermal expansion coefficients of polymers mortar between 25 ~ 100 DEG C is 8.86 × 10
-6, with the thermal expansivity (8 ~ 12 × 10 of normal concrete
-6) close.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. the preparation method of a resistant to elevated temperatures ground polymers base reinforcing and repairing mortar, it is characterized in that, comprise the following steps: metakaolin and flyash pressed powder, chopped strand are mixed, then the potash water glass solution of cooling is added, hand operated mixing, then automatic stirring on cement mortar mixer, then add sand, automatic stirring, obtained ground polymers base reinforcing and repairing mortar;
Described metakaolin and flyash pressed powder, potash water glass solution, sand and chopped strand as follows by its add-on of mass parts:
Metakaolin and flyash pressed powder 100 parts
Potash water glass solution 90-130 part
Sand 300-500 part
Chopped strand 0-2 part.
2. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, is characterized in that: the described hand operated mixing time is 2-3 minute; Adding the automatic stirring time before sand is 2-3 minute; Adding the automatic stirring time after sand is 8-15 minute.
3. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, it is characterized in that: in metakaolin and flyash pressed powder, the mass percent of metakaolin accounts for 50% ~ 80% of pressed powder total mass, and the mass percent of flyash is 20% ~ 50%.
4. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, is characterized in that: described flyash is Class F fly ash.
5. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, it is characterized in that: in described potash water glass solution, potash water glass modulus is 1.0 ~ 1.4, mass concentration is 35% ~ 40%, and potash water glass solution naturally cooling.
6. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, is characterized in that: described sand is natural river sand, fineness modulus 1.6 ~ 3.0.
7. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, is characterized in that: described chopped strand is chopped carbon fiber or the basalt fibre of length 3 ~ 6mm.
8. the preparation method of a kind of resistant to elevated temperatures ground according to claim 1 polymers base reinforcing and repairing mortar, is characterized in that: described chopped strand is by described mass parts, and add-on is 0.5-2 part.
9. the ground polymers base reinforcing and repairing mortar that method prepares according to any one of claim 1 ~ 8.
10. polymers mortar is applied to reinforcing or mending concrete structural member according to claim 9ly.
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| CN110316984B (en) * | 2019-07-10 | 2021-05-28 | 安徽工业大学 | Composite alkali-excited solid waste type high-shearing-force high-temperature-resistant inorganic adhesive and preparation method thereof |
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