CN102924105B - Portland cement refractory mortar and construction process thereof - Google Patents
Portland cement refractory mortar and construction process thereof Download PDFInfo
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- CN102924105B CN102924105B CN201210502740.6A CN201210502740A CN102924105B CN 102924105 B CN102924105 B CN 102924105B CN 201210502740 A CN201210502740 A CN 201210502740A CN 102924105 B CN102924105 B CN 102924105B
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 114
- 239000011398 Portland cement Substances 0.000 title claims abstract description 25
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000006004 Quartz sand Substances 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011449 brick Substances 0.000 claims description 40
- 239000003469 silicate cement Substances 0.000 claims description 33
- 239000004575 stone Substances 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011863 silicon-based powder Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 6
- 238000001354 calcination Methods 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 239000004927 clay Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 description 19
- 239000000463 material Substances 0.000 description 13
- 239000004568 cement Substances 0.000 description 12
- 235000019832 sodium triphosphate Nutrition 0.000 description 12
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 101710194948 Protein phosphatase PhpP Proteins 0.000 description 6
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical group [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000003837 high-temperature calcination Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 240000001085 Trapa natans Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 235000009165 saligot Nutrition 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 238000010671 solid-state reaction Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229940024546 aluminum hydroxide gel Drugs 0.000 description 1
- SMYKVLBUSSNXMV-UHFFFAOYSA-K aluminum;trihydroxide;hydrate Chemical compound O.[OH-].[OH-].[OH-].[Al+3] SMYKVLBUSSNXMV-UHFFFAOYSA-K 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Ceramic Products (AREA)
Abstract
The invention discloses a Portland cement refractory mortar and a construction process thereof. The portland cement refractory mortar comprises the following components in percentage by mass: 12-16% of Portland cement, 10-15% of powdery fire clay, 5% of silica micropowder, 20-30% of quartz sand, 30-50% of river sand and the balance of water. The refractory mortar has higher early strength, can bear the high temperature of calcination, has higher bonding property and strength after calcination, solves the safety problem in the current construction process, and has lower cost than the common refractory castable.
Description
Technical field
The present invention relates to a kind of refractory mortar and construction technology thereof, particularly relate to a kind of Portland cement refractory mortar and construction technology thereof, for building refractory brick by laying bricks or stones.
Background technology
The resistance to ignition technique comparative maturity of prior art, micropowder technology, low cement technology Successful utilization, in refractory castable, enable the fire-resistant structures of cast work in very harsh hot environment.But use the cost of refractory castable often very high, require not harsh Working environment at some to hot environment, structures adopt refractory castable cast can cause the waste of function and the increase of cost undoubtedly.
At present, some are at 500 DEG C of structures to 1200 DEG C of environmental works, as open flow hole fireproof brickwork, independent flue, the small-sized kiln etc. of petroleum industry, for cost consideration design laying fireproof bricks.In this case, the body of wall adopting refractory brick peace to build is fire-proof and thermal-insulation structure, is again load larrying member.
Use refractory mortar to build refractory brick by laying bricks or stones as liner thermofin in Industrial Stoves, need use and draw brick hook to be connected with load-bearing exterior wall to guarantee its stability; But when being used alone laying fireproof bricks body of wall, cannot ensure by its stability of body of wall that refractory mortar peace is built.
In prior art, block refractory brick directly pacified by the general refractory mortar that adopts, and this design exists major defect, makes the fireproof brickwork built there is serious security-hidden trouble.Refractory mortar main component is aluminium sesquioxide, is packing material, non-gelled material, to build by laying bricks or stones after refractory brick through high-temperature calcination, because its chemical composition and refractory brick are substantially identical, can sinter an entirety into, have certain intensity after sinter-hardened; But before calcination, refractory mortar does not almost have intensity, and can not be effectively bonding with refractory brick, can not play bonding and effect that is load-bearing, the accident such as easily collapse, topple in building process and before calcining, there is very big potential safety hazard.Be embodied in building process: 1, refractory mortar adhesiveproperties is poor, fragment of brick easy landing when peace is built; 2, refractory mortar is without intensity, and body of wall easily collapses under external force; 3, refractory mortar consolidation time is very long, can consolidation after having to pass through open flow operation.
In national regulation, calcine the intensity after 3 hours under specify only refractory mortar 110 DEG C of dried intensity and 1400 DEG C of situations, after being respectively 110 DEG C of dryings, intensity is 1.0MPa; 1400 DEG C are calcined intensity after 3 hours is 4.0MPa.
In practice, refractory mortar is commonly used to the liner thermofin body of wall of building Industrial Stoves by laying bricks or stones, and thermofin and exterior wall guarantee stability by drawing brick hook to socket.Because Industrial Stoves are closed core structures, this structure is more stable compared with the U-shaped structure of fireproof brickwork.Meanwhile, the thermofin in Industrial Stoves can will come into operation after 110 DEG C dry, and the structures such as the fireproof brickwork of petroleum industry, independent flue do not have this operation before use.
Experimentally result, is made into standard test block with pure refractory mortar and carries out experiment time of coagulation, and its presetting period is 26168 minutes, and final setting time is 36273 minutes.National regulation specifies: silicate cement initial set is not less than 45min, and final set is not more than 390min; Aluminate cement initial set is not less than 30min, and final set is not more than 360min; Experimental result shows that refractory mortar does not possess adhesiveproperties.
Be made into standard test block with pure refractory mortar and carry out axial compressive strength experiment, maintenance after 28 days test block pressure resistance intensity be 0.3-0.5 MPa.National regulation specifies: provisional structures masonry mortar minimum intensity is greater than 2.5MPa, and experimental result shows that refractory mortar does not possess resistance to compression load-bearing property.
In sum, directly adopt refractory mortar peace to build refractory brick and be used for load larrying member, will serious security-hidden trouble be caused.
At present, the intensity index of refractory mortar under 110 DEG C of oven dry and 1400 DEG C × 3h, two kinds of situations is only had in national regulation " GB 2994-2008-T High-Alumina refractory mortar ", and peace builds the mortar joint " requirement of 3mm, intensity in peace block process and between preserving period does not specify, test through reality, pure refractory mortar is made the test block of 70.7mm × 70.7mm × 70.7mm, normal curing condition lower 28 days its axial compressive strengths are 0.3 ~ 0.5MPa, well below country to structures mortar strength code requirement, in refractory mortar specification 110 DEG C dry after intensity " also lower than mortar strength code requirement, (the minimum mortar strength of general temporary building is 2.5MPa for the requirement of 1MPa, permanent construction is higher).Therefore, improve refractory mortar, the refractory mortar that preparation has bonding effect and load-bearing effect is necessary.
Summary of the invention
The object of the invention is to the problems referred to above overcoming the existence of existing refractory mortar, a kind of Portland cement refractory mortar and construction technology thereof are provided, refractory mortar of the present invention has higher early strength, the high temperature of calcining can be born, there is after calcining comparatively excellent adhesion property and intensity, solve the safety problem in current construction process, and the refractory castable that cost is comparatively commonly used is cheaper.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Portland cement refractory mortar, it is characterized in that, comprise the component of following mass percent: silicate cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 30 ~ 50%, surplus is water.
The present invention also comprises the early strength water-reducing agent that mass percent is 0.5 ~ 2%.
The maximum particle diameter of described quartz sand is less than 4mm.
Described river sand is the fine sand of continuous grading, and specification is 0.5 ~ 1mm.
Described early strength water-reducing agent is tripoly phosphate sodium STPP or calcium chloride.
A construction technology for Portland cement refractory mortar, is characterized in that, comprises the steps:
(1), prepare burden: raw material is prepared burden by mass percentage;
(2), the raw material of step (1) mixed by proportioning and stir;
(3), after completion of stirring 4 time interior use step (2) refractory mortar that obtains build refractory brick by laying bricks or stones;
(4), build rear natural curing by laying bricks or stones to solidify to mortar.
In described batching step, when external temperature is more than 10 DEG C, when described silicate cement selects 42.5 model, its consumption is 12 ~ 15%, and when silicate cement selects 52.5 model, its consumption is 10 ~ 12%.
In described batching step, when external temperature is below 9 DEG C, during described silicate cement selection 42.5R, its consumption is 12 ~ 15%, and during silicate cement selection 52.5R, its parameter is 10 ~ 12%, and adds the early strength water-reducing agent having 0.5 ~ 2%.
Employing the invention has the advantages that:
One, the present invention includes the component of following mass percent: silicate cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 30 ~ 50%, surplus is water, this refractory mortar has higher early strength, the high temperature of calcining can be born, there is after calcining comparatively excellent adhesion property and intensity, solve the safety problem in current construction process, and the refractory castable that cost is comparatively commonly used is cheaper, design mortar mark uses M7.5 label the most general to design according to current building trade, namely the intensity of mortar at the standard conditions after the maintenance intensity of 28 days and high-temperature calcination all reaches more than 7.5MPa.
Two, the present invention uses Novel silicate cement refractory mortar to replace traditional refractory mortar to construct, improve the performance of refractory mortar, effectively improve the early strength of mortar, add the adhesiveproperties of mortar and refractory brick, ensure that the intensity of mortar after high-temperature calcination simultaneously.
Three, the present invention includes silicon powder 5%, for filling and lubrication, the space between energy filler aggregate and powder, makes water consumption reduce; After formed body gets rid of moisture, the hole stayed is also less, can improve volume density and reduce void content, thus improving the structural strength of material, optimizing material property.
The free calcium oxide of four, separating out during aquation of the present invention is few, and quartz sand is insoluble to acid, stable chemical nature, effectively improves mortar corrosion resistance nature; Raw materials easily obtains, and layoutprocedure and the equal handled easily of construction process, can not extend construction period, without all the other side effects, without potential safety hazard, is suitable for very much and requires not harsh engineering to hot environment; Comparatively traditional technology effectively reduces construction risk, eliminates potential safety hazard, improves construction quality, and comparatively traditional technology effectively reduces construction cost.
Five, the present invention includes quartz sand 20 ~ 30%, mainly play the effect of coarse aggregate, because it has water caltrop through its surface of Mechanical Crushing, can increase the frictional force between aggregate, quartz sand has resistant to elevated temperatures feature simultaneously, can effectively improve mortar ultimate compression strength.
Six, after adopting the present invention, in the winter time under cold climate, this refractory mortar setting rate is slower, early strength is slightly little within equal preserving period, the early-strength type silicate cement of band R label can be used, simultaneously 0.5 ~ 2% add early strength water-reducing agent by mass percentage, can effectively improve its solidify after intensity.
Seven, when external temperature is more than 10 DEG C, when described silicate cement selects 42.5 model, its consumption is 12 ~ 15%, when silicate cement selects 52.5 model, its consumption is 10 ~ 12%, adopts the cement of different model, different consumptions can be adopted to reach same intensity effect.
Eight, when external temperature is below 9 DEG C: when adopting silicate cement 42.5R, its parameter is 12 ~ 15%, when adopting silicate cement 52.5R, its parameter is 10 ~ 12%, early strength increases very fast, within 7 days, about 70% of its ultimate strength can be reached, to solve in the slower problem of cold climate mortar strength development.
Nine, resistance to elevated temperatures of the present invention is better, reaches 500 DEG C to 1200 DEG C, because there is solid state reaction during high temperature, sinter bonded instead of aquation and combines, and mortar mainly generates C
3aH
6with SiO
2, the two is more stable material, not easily reacts with other materials, can ensure mortar later stage ultimate compression strength.
Ten, the present invention can be used for the environment not harsh to high temperature operating conditions such as simple and easy fireproof brickwork, independent flue, small-sized kiln, and general temperature is at 500 DEG C---between 1200 DEG C.
Embodiment
Embodiment 1
A kind of Portland cement refractory mortar, comprise the component of following mass percent: silicate cement 16%, powdery refractory mortar 15%, silicon powder 5%, quartz sand 30%, river sand 50%, surplus is water.
The present invention also comprises the early strength water-reducing agent that mass percent is 2%.Described early strength water-reducing agent is water reducer tripoly phosphate sodium STPP.The maximum particle diameter of described quartz sand is less than 4mm.Described river sand is the fine sand of continuous grading, and specification is 0.5mm.
A construction technology for Portland cement refractory mortar, comprises the steps:
(1), prepare burden: raw material is prepared burden by mass percentage;
(2), the raw material of step (1) mixed by proportioning and stir;
(3), after completion of stirring 4 time interior use step (2) refractory mortar that obtains build refractory brick by laying bricks or stones;
(4), build rear natural curing by laying bricks or stones to solidify to mortar.
Embodiment 2
A kind of Portland cement refractory mortar, comprise the component of following mass percent: silicate cement 12, powdery refractory mortar 10%, silicon powder 5%, quartz sand 20%, river sand 30%, surplus is water.
The present invention also comprises the early strength water-reducing agent that mass percent is 0.5%.Described early strength water-reducing agent is hardening accelerator calcium chloride, and early strength water-reducing agent can be not limited to described two kinds, and other early strength water-reducing agent of the prior art also can use.The maximum particle diameter of described quartz sand is less than 4mm.Described river sand is the fine sand of continuous grading, and specification is 1mm.
A construction technology for Portland cement refractory mortar, comprises the steps:
(1), prepare burden: raw material is prepared burden by mass percentage;
(2), the raw material of step (1) mixed by proportioning and stir;
(3), after completion of stirring 4 time interior use step (2) refractory mortar that obtains build refractory brick by laying bricks or stones;
(4), build rear natural curing by laying bricks or stones to solidify to mortar.
Embodiment 3
A kind of Portland cement refractory mortar, comprise the component of following mass percent: silicate cement 14%, powdery refractory mortar 12%, silicon powder 5%, quartz sand 25%, river sand 40%, surplus is water.
The present invention also comprises the early strength water-reducing agent that mass percent is 1.5%.Described early strength water-reducing agent is tripoly phosphate sodium STPP.The maximum particle diameter of described quartz sand is less than 4mm.Described river sand is the fine sand of continuous grading, and specification is 0.8mm.
A construction technology for Portland cement refractory mortar, comprises the steps:
(1), prepare burden: raw material is prepared burden by mass percentage;
(2), the raw material of step (1) mixed by proportioning and stir;
(3), after completion of stirring 4 time interior use step (2) refractory mortar that obtains build refractory brick by laying bricks or stones;
(4), build rear natural curing by laying bricks or stones to solidify to mortar.
Embodiment 4
In described batching step, when external temperature is more than 10 DEG C, when described silicate cement selects 42.5 model, its consumption is 12 ~ 15%, and when silicate cement selects 52.5 model, its consumption is 10 ~ 12%.
Embodiment 5
In described batching step, when external temperature is below 9 DEG C, during described silicate cement selection 42.5R, its consumption is 12 ~ 15%, and during silicate cement selection 52.5R, its parameter is 10 ~ 12%, and adds the early strength water-reducing agent having 0.5 ~ 2%.
Embodiment 6
For building a mortar for petroleum industry fireproof brickwork by laying bricks or stones, raw material comprises following component by mass percentage: ordinary Portland cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 30 ~ 50%, and surplus is water.These components are existing component, all can buy on the market.
Ordinary Portland cement concrete can not bear the working conditions of high temperature, because it separates out calcium hydroxide in hydration process, becomes calcium oxide (being commonly called as lime or gypsum) under high temperature; As decomposes under the Wingdale high temperature of aggregate, intensity is destroyed.Normal concrete can only be used for stove basis and chimney less than 300 degree low-temperature sections.Therefore use silicate cement to make the agglutinate of refractory concrete, the effect of calcium oxide must be eliminated.The refractory mortar powder adding cement weight 80% ~ 100% makes Additive, makes itself and calcium oxide be combined into more stable calcium aluminate mineral.See following reaction formula:
Ca（OH）
2+2Al
2O
3+12 H
2O→CaO·Al
2O
3·10 H
2O+Al
2O
3·3 H
2O
CaOAl
2o
310 H
2o is abbreviated as CAH
10;
Ca（OH）
2+2Al
2O
3+17 H
2O→2CaO·Al
2O
3·8 H
2O+Al
2O
3·3 H
2O
2CaOAl
2o
38 H
2o is abbreviated as C
2aH
8;
Hydrated product CAH
10with C
2aH
8be needle-like or plate crystal, firmer crystallization compound body can be interweaved into, make mortar have higher intensity, the aluminum hydroxide gel (Al of precipitation
2o
33 H
2o) be insoluble in water, be filled in the space of crystalline framework, form dense structure.
Silicon powder Basic Mechanism is filled and lubrication.Space between micro mist energy filler aggregate and powder, makes water consumption reduce; After formed body gets rid of moisture, the hole stayed is also less, so just can improve volume density and reduce void content, thus improving the structural strength of material, optimizing material property.
Quartz sand hardness is 7, stable chemical nature, fusing point 1750 DEG C, water insoluble, be slightly soluble in acid, it is desirable refractory materials, mainly play the effect of coarse aggregate, because it has water caltrop through its surface of Mechanical Crushing, the frictional force between aggregate can be increased, quartz sand has resistant to elevated temperatures feature simultaneously, can effectively improve mortar ultimate compression strength.
CAH
10with C
2aH
8for meta material, can gradate as more stable C
3aH
6.Conversion process raises along with temperature and accelerates.After high-temperature calcination, mortar main component is C
3aH
6with SiO
2, the two is more stable material, not easily reacts with other materials, can ensure mortar later stage ultimate compression strength.
In the winter time under cold climate, this refractory mortar setting rate is slower, early strength is slightly little within equal preserving period, the early-strength type silicate cement of band R label can be used, simultaneously 0.5 ~ 2% add water reducer tripoly phosphate sodium STPP or hardening accelerator calcium chloride by mass percentage, can effectively improve its solidify after intensity.
When external temperature is more than 10 DEG C: when described silicate cement selects 42.5 model, its consumption is 12 ~ 15%, when silicate cement selects 52.5 model, its consumption is 10 ~ 12%.Further, adopt the cement of different model, different consumptions can be adopted to reach same intensity effect.
When external temperature is below 9 DEG C: when adopting silicate cement 42.5R, its parameter is 12 ~ 15%, when adopting silicate cement 52.5R, its parameter is 10 ~ 12%.At employing early-strength type silicate cement, this refractory mortar early strength increases very fast, within 7 days, can reach about 70% of its ultimate strength, to solve in the slower problem of cold climate mortar strength development.
This refractory mortar resistance to elevated temperatures is better, reach 500 DEG C to 1200 DEG C, because there is solid state reaction during high temperature, sinter bonded instead of aquation and combines, mortar mainly generates C3AH6 and SiO2, the two is more stable material, not easily reacts with other materials, can ensure mortar later stage ultimate compression strength.
Embodiment 7
The construction technology of refractory mortar, comprises the steps:
(1) environmentally condition selects batching: when envrionment temperature is more than 10 DEG C, ordinary Portland cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 30 ~ 50%, and surplus is water; When temperature is lower than 10 DEG C, uses R type early strength silicate cement, add water reducer tripoly phosphate sodium STPP or the hardening accelerator calcium chloride of 0.5 ~ 2% simultaneously; In different seasons, adopt different batchings according to different envrionment temperatures, in temperature higher spring, summer, autumn, hardening accelerator or early strength water-reducing agent can be added, under natural curing condition, can service requirements be met;
(2) employing machine is mixed or the raw material of step (1) mixes by proportioning and stirs by artificial mode; According to actual amount and on-the-spot appointed condition, the mode that employing machine is mixed stirs, and after stirring, the water-retentivity of mortar, workability all meet service requirements, can construction usage;
(3) mortar using step (2) to obtain in 4 hours is after completion of stirring built a wall; After mortar has stirred, should use completely in 4 hours.
(4) after building a wall, natural curing is solidified to mortar.Under normal circumstances, the mode of natural curing should be adopted, forbid use water, steam to carry out maintenance, in the winter of cold, the mode of insulated curing can be adopted.
In construction process, should be noted that following content:
1, before building by laying bricks or stones, refractory brick must be fully moistening, prevents the refractory brick of pacifying block from absorbing water from refractory mortar and cause mortar bonding strength and ultimate compression strength to reduce.
2, configure refractory mortar, stirred by proportioning by above-mentioned raw materials, winter suitably increases cement proportion or adds water reducer, and namely for laying fireproof bricks, because quartz sand is 2 ~ 5mm solid matter, therefore stirring uses mechanical stirring as far as possible.
Make mortar mortar joint control at 8 ~ 11mm when 3, building by laying bricks or stones as far as possible.
4, peace is forbidden after finishing building into water curing, can only natural curing.
Embodiment 8
A kind of Portland cement refractory mortar of the present invention, comprise following component: ordinary Portland cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 40 ~ 55%, surplus is water; When temperature is lower than 10 DEG C, add the early strength water-reducing agent tripoly phosphate sodium STPP of 0.5 ~ 2%; The maximum particle diameter of quartz sand is less than 4mm, and river sand is 0.5 ~ 1mm fine sand of continuous grading.
When external temperature is more than 10 DEG C: when described silicate cement selects 42.5 model, its consumption is 12 ~ 15%, when silicate cement selects 52.5 model, its consumption is 10 ~ 12%.When external temperature is below 10 DEG C: when adopting silicate cement 42.5R, its parameter is 12 ~ 15%, when adopting silicate cement 52.5R, its parameter is 10 ~ 12%.
The construction technology of a kind of Portland cement refractory mortar of the present invention, comprises the steps:
(1) environmentally condition selects batching;
(2) employing machine is mixed or the raw material of step (1) mixes by proportioning and stirs by artificial mode;
(3) mortar using step (2) to obtain in 4 hours is after completion of stirring built a wall;
(4) after building a wall, natural curing is solidified to mortar.
After making according to said components and technique, detect data as follows:
Experimentally data, when refractory mortar, silicon powder volume are certain, mortar strength increases with the increase of cement mixing content, and increase with the increase of bauxite grains volume, the change that quartz sand volume causes comparatively cement mixing content is larger.The selection of cement model is little on the impact of mortar final strength, because the early-strength type cement early strength of band R is large, but later strength development is comparatively slow, when all the other volumes are constant, the ultimate compression strength of the mortar of the early-strength type cement configuration more general cement of intensity when maintenance 7 days is high by about 20%.
By controlling the proportion of each spike in formula, the ultimate compression strength of configured mortar can be controlled, generally, M7.5 mortar can meet most structures and build needs by laying bricks or stones, in actual job process, workmen can adjust formula according to actual needs, has reached the object controlling ultimate compression strength and engineering cost.
Claims (4)
1. a Portland cement refractory mortar, is characterized in that, comprises the component of following mass percent: silicate cement 12 ~ 16%, powdery refractory mortar 10 ~ 15%, silicon powder 5%, quartz sand 20 ~ 30%, river sand 30 ~ 50%, and surplus is water.
2. Portland cement refractory mortar according to claim 1, is characterized in that: the maximum particle diameter of described quartz sand is less than 4mm.
3. Portland cement refractory mortar according to claim 1, is characterized in that: described river sand is the fine sand of continuous grading, and specification is 0.5 ~ 1mm.
4. the construction technology of a kind of Portland cement refractory mortar according to claim 1, is characterized in that, comprise the steps:
(1), prepare burden: raw material is prepared burden by mass percentage;
(2), the raw material of step (1) mixed by proportioning and stir;
(3), after completion of stirring 4 time interior use step (2) refractory mortar that obtains build refractory brick by laying bricks or stones;
(4), build rear natural curing by laying bricks or stones to solidify to mortar.
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| CN103833284A (en) * | 2014-03-06 | 2014-06-04 | 四川雅豪房地产开发有限公司 | Preparation method of house outer-wall mortar |
| CN104150933B (en) * | 2014-08-29 | 2016-02-24 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of high temperature insulating refractory mortar |
| CN104446574A (en) * | 2014-12-29 | 2015-03-25 | 江苏健神生物农化有限公司 | High-strength refractory cement mortar in petroleum industry and construction process thereof |
| CN106186972B (en) * | 2016-07-06 | 2018-08-31 | 德清扬泰建筑材料有限公司 | A kind of method that reclaimed materials prepares dry powder and mortar |
| CN106631067A (en) * | 2016-12-23 | 2017-05-10 | 安徽元通采暖科技有限公司 | Special refractory brick for chimney and preparation technology thereof |
| CN106673524B (en) * | 2016-12-27 | 2018-11-20 | 广州市建筑科学研究院有限公司 | A kind of mortar and preparation method thereof of saline-alkali tolerant cracking resistance |
| CN107117973A (en) * | 2017-04-01 | 2017-09-01 | 三明学院 | A kind of green novel fire-resistant mortar and its manufacture method |
| CN113087469B (en) * | 2021-04-12 | 2022-04-19 | 北京东峰兴达耐火材料有限公司 | Heat-resistant mortar |
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