CN101182178B - Special masonry mortar for self-insulating wall - Google Patents
Special masonry mortar for self-insulating wall Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to masonry mortar special for self-insulation walls, which is a powdery mixture and consists of the components with the following weight portions of 52-68 portions of cementing materials, 20-36 portions of gradation aggregates, 12-25 portions of vitrified hollow micro-pearl, 0.2-0.26 portions of redispersibility emulsion, 3-12 portions of thickener rheology agent, 0.05-0.3 portions of water retaining agent, 0.05-0.3 portions of anti-fissure strengthening agent and 0.012-0.035 portions of anti-entraining agent. The invention has the advantages of good water retention, low heat conductivity, high mechanical strength, good flexible crack resistance, good waterproof performance, good dry shrinkage resistance, good fireproof performance, easy construction, high performance-price ratio, energy saving performance, etc.
Description
Technical field
The present invention relates to a kind of building mortar, particularly a kind of masonry mortar that is exclusively used in self heat insulation wall.
Background technology
Building energy conservation meets national industrial policies.And to realize building energy conservation, must improve building external and protect the particularly energy-saving index of body of wall, along with deepening continuously of building energy conservation, multiple wallings with autonomous incubation and thermal insulation function such as various new wall materials such as concrete hollow block, autoclave aerated concrete building block brick, light porous brick, fly ash building block brick are widely used.Yet, masonry mortar present and that above-mentioned self-insulating wall material is supporting mostly adopts ordinary mortar, this class mortar is with supporting uses of self heat insulation wall such as concrete hollow block, autoclave aerated concrete building block brick, light porous brick, fly ash building block bricks the time, because of big, the dry-shrinkage deformed characteristics such as big of self-thermal insulation wall building block (brick) water regain, when building by laying bricks or stones and plaster, there is following problem:
1. adopting ordinary mortar that self heat insulation wall is built by laying bricks or stones and when wiping one's face, can not guarantee the full of slit mortar and both good bondings, is self heat insulation wall rimose one of the main reasons.This is the poor water retention property owing to ordinary mortar, and the moisture in the mortar is very fast to be sopped up, and aquation can not fully be carried out, and does not reach cohesive strength; Secondly the shrinkage value of ordinary mortar and heat insulation building block is different, and the variation of volume makes the building block tension, two adjacent mortar pressurizeds, when tensile stress during greater than tensile strength, not being that building block is broken, is the continuous damage of seam damage or building block, produces wall crazing thus.
2. as self heat insulation wall, building by laying bricks or stones and wipe one's face with ordinary mortar is the major cause that produces cold and hot bridge, havoc heat insulation effect.The thermal conductivity of self-thermal insulation wall building block (brick) is generally 0.11～0.20W/mk, and the thermal conductivity of common masonry mortar and plastering mortar arrives 1.0～1.1W/mk, therefore the masonry mortar place is easy to generate cold and hot bridge problem, destroys the heat insulation effect of self heat insulation wall.
3. through the literature search of prior art is found, " polystyrene foamed particle heat insulation mortar " dry density of invention such as massing troops is 300～480kg/m
3, thermal conductivity is 0.07～0.13W/mk.But actual engineering result of use shows, the thermal insulation mortar that polystyrene foam particles has been mixed in use is used for building by laying bricks or stones and plastering of self heat insulation wall, because the volume stability of organic foam and inorganic materials exists than big-difference, particularly this foam beads easily produces irreversible volume change under 70 ℃ of pyritous situations, very easily cause the hollowing and the cracking of masonry mortar, thereby can't satisfy the permanent service requirements supporting with self heat insulation wall; " Superlight vitrification micropearl morttar " of Zhao Hui invention adopts brushing gypsum is gelling material; light vitreous microballon is an aggregate; its thermal conductivity is 0.07W/mk; ultimate compression strength only is slightly larger than and is 1Mpa; tensile strength and cohesive strength only are slightly larger than 0.2Mpa; for being exclusively used in building by laying bricks or stones and plastering of self heat insulation wall, the intensity aspect has much room for improvement.
Therefore, can satisfy the performance requriements of terms of mechanics such as intensity, can satisfy the low thermal conductivity requirement again, and can seem extremely important with self-heat conserving is supporting.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art and defective, the special masonry mortar of a kind of self-thermal insulation wall building block (brick) is provided, make it can satisfy mechanical property requirements such as intensity aspect, satisfy the requirement of low thermal conductivity, can mate mutually with self-thermal insulation wall building block (brick) again.To substitute traditional masonry mortar.
The present invention solves its technical problem and adopts following technical scheme:
The special masonry mortar for self-insulating wall that provides; component that it contains and parts by weight are: 52～68 parts of gelling material; 20～36 parts of graded aggregates; 12～25 parts of vitreous hollow beads; 0.2～0.26 part of redispersible latex powder, 3～12 parts of thickener rheology agents, 0.05～0.3 part of water-holding agent; 0.05～0.3 part of crack-resisting reinforcing agent, 0.012～0.035 part of air entrapment agent.
Special masonry mortar for self-insulating wall provided by the invention compared with prior art has following major advantage through repeatedly experiment showed:
1. good water-retaining property: alleviate self heat insulation wall water regains such as steam-pressing aero-concrete greatly to the influence of mortar, in the body of wall that has the gas concrete light porous, that water regain is big to build by laying bricks or stones, use, the moisture that can guarantee masonry mortar and plastering mortar can not absorbed by gas concrete very soon, guarantees that the aquation of mortar is abundant.And the mortar that water retention property is good can save the operation that metope waters before construction.Solve the wall crazing problem that adopts ordinary mortar to bring, and effectively ensured the mortar later strength.
2. thermal conductivity is low: the vitreous hollow beads and the active haydite ore in sand form that adopt autonomous production, on the one hand because of vitreous hollow beads surface through the high temperature vitreous, form the inner hollow structure, have the stable low thermal conductivity of 0.035～0.047W/mk, cylindrical compress strength is about 200KPa; The thermal conductivity of haydite is 0.23～0.55W/mk, and cylindrical compress strength is 1.1～1.3MPa.The thermal conductivity of special masonry mortar for self-insulating wall reduces the influence of cold and hot bridge, makes to form the well behaved self heat insulation wall of integral heat insulation.The volume of vitreous hollow beads is big more, and the thermal conductivity of mortar is more little, but the intensity of mortar is poor more; Mixing of active haydite ore in sand form; intensity can obtain certain guarantee, but the thermal conductivity influence of mortar is not had the big of vitreous hollow beads, therefore; vitreous hollow beads and active haydite ore in sand form compound effectively makes its mechanical strength and thermal conductivity reach balance.Vitreous hollow beads physical and chemical indexes sees table 1 for details.
3. mechanical strength height: be that the special masonry mortar intensity aspect of gelling material is better than with the brushing gypsum with the cement based be the masonry mortar of gelling material, use high-alumina cement, can form ettringite, its microdilatancy can compensate harmful contraction of concrete mortar, and the consolidation of early strength is had very great help.After tested, its cohesive strength 〉=0.25Mpa, tensile strength 〉=0.25Mpa, ultimate compression strength 〉=2.5Mpa is better than the mechanical strength level of traditional masonry mortar.
4. the flexible break resistant performance is good: latex powder to the modification of gelling material be embodied in latex powder water-soluble after, between sand-cement slurry and substrate surface, play the effect that connects bridge, make the rigidity system of cement structures become pliable and tough, on microcosmic, overcome the rigidity mortar and brought inevitably dried the contraction to adapt to possible stress deformation.In addition, in special masonry mortar for self-insulating wall, introduce polypropylene fibre as adulterant.The polypropylene fibre chemical property is stable, can be in the inner formation of mortar uniformly disorderly to support system, reduce the shrinkage strains and the capillary tension of mortar, can control the tiny crack that gas concrete causes because of factors such as dryness contraction, temperature variation effectively, thereby stop the generation and the development of mortar clinking, play certain effect of prestressed.
5. good waterproof performance: mixing of high-alumina cement makes mortar form ettringite, stopped up unnecessary pore to a certain extent, effectively reduce the possibility that enters mortar more than moisture, had favorable waterproof property, and prevented the accumulation of salt in the surface soil phenomenon of mortar to a certain extent.
6. anti-shrinkage performance is good: the drying shrinkage value of control mortar has great role to control self heat insulation wall cracking.In the mortar hydration process, dehydration is the major cause that causes dry shrinkage.Studies show that, in mortar, add the drying shrinkage value that mineral admixture such as flyash can reduce mortar.The shrinkage performance that the water-retentivity that guarantees mortar simultaneously also can reduce mortar plays the effect of long-pending level.
7. fire resistance is good: by adopting unorganic glass hollow beads, grating quartz sand (or yellow ground) and active haydite ore in sand form is due to the aggregate.
8. environmental-friendly and comfortable: the vitreous hollow beads is an inorganic materials, does not nontoxicly contain radiation, and other mainly all adopts, and inorganic materials is composite to form, and is the environmental type material of construction.
9. construct simple and easy, cost performance is high: the self-heat conserving dedicated mortar is the single component material of construction, only need add water during construction in proportion and stir and to use, with traditional masonry mortar basically identical, need not special maintenance on the construction technology, reduction of erection time is saved cost, cost performance height.
10. energy-saving effect is remarkable: be used for building by laying bricks or stones of self-thermal insulation wall building block (brick), can stop " hot and cold bridge ", and utilize the production of industrial residue flyash to have the building by laying bricks or stones and plastering, economic benefit and obvious social benefit of self-insulation wall material of self-heat conserving function.For example use this masonry mortar to be used for building by laying bricks or stones on the thick brick wall of steam-pressing aero-concrete 240mm, thickness 10～15mm can reach the heat insulation effect of 490mm brick wall.
Special masonry mortar for self-insulating wall main performance index provided by the invention sees table 2 for details.
Embodiment
Special masonry mortar for self-insulating wall provided by the invention; be pulverulent mixture; component that it contains and parts by weight thereof are: 52～68 parts of gelling material; 20～36 parts of graded aggregates, 12～25 parts of vitreous hollow beads, 0.2～0.26 part of redispersible latex powder; 3～12 parts of thickener rheology agents; 0.05～0.3 part of water-holding agent, 0.05～0.3 part of crack-resisting reinforcing agent, 0.012～0.035 part of air entrapment agent.
Described gelling material can adopt the mixture of P.O42.5 cement, high-alumina cement, flyash and active haydite ore in sand form, its each ingredients constitute mortar gross weight umber is: 33.5～44.2 parts of P.O42.5 cement, 2.4～4.8 parts of high-alumina cements, 4.5～10 parts in flyash, 8.3～17 parts in active haydite ore in sand form.
Described graded aggregate can adopt the mixture of 30～70 orders and two kinds of quartz sands of 70～100 orders or yellow ground, and the weight proportion of these two kinds of quartz sands is 7: 3.
Described redispersible latex powder can adopt polyvinyl acetate (PVA)-ethylene copolymer, and its minimum film-forming temperature is 0 ℃.
Described thickener rheology agent can adopt the mixture of modified alta-mud (commercially available), starch ethers, white lime and silicon ash, and its its each ingredients constitute mortar gross weight umber is: 2.2～4.5 parts of modified alta-muds; 0.06～0.1 part in treated starch ether or composite starch ether, 0.6～3.2 part of white lime; 0.24～0.65 part of silicon ash.
Described water-holding agent can adopt the mixture of methyl cellulose ether, methylhydroxypropylcellulose ether and methyl carboxyethyl cellulose ether, and its each ingredients constitute mortar gross weight umber is: 0.01～0.06 part of methyl cellulose ether, substitution value are 1.6～2.0; 0.03～0.18 part in methylhydroxypropylcellulose ether, substitution value are 1.2～2.0; 0.01～0.06 part in methyl carboxyethyl cellulose ether, substitution value are 1.5～2.0.
Described crack-resisting reinforcing agent can adopt grating specification polypropylene anti-crack fiber or PP fiber, and length adopts 6～8mm and two kinds of specifications of 10～12mm, and the two weight proportion is 1: 1.
Described air entrapment agent can adopt alkylbenzene sulfonate, and main component is a Sodium dodecylbenzene sulfonate.
Above-mentioned special masonry mortar for self-insulating wall provided by the invention, its preparation method is: pressing gelling material, graded aggregate, vitreous hollow beads, redispersible latex powder, thickener rheology agent, water-holding agent, crack-resisting reinforcing agent and air entrapment agent separately, the component uniform mixing gets final product.
The invention will be further described below in conjunction with specific embodiment, but do not limit the present invention.
Embodiment 1:
Each amount of substance that special masonry mortar for self-insulating wall comprised is: P.O42.5 cement 33.5Kg; high-alumina cement 2.4Kg; flyash 4.5Kg; active haydite ore in sand form 8.3Kg, 30～70 order quartz sand (or yellow ground) 13.76Kg, 70～100 order quartz sand (or yellow ground) 5.90Kg; vitreous hollow beads 25Kg; redispersible latex powder 0.22Kg, modified alta-mud 4.0Kg, starch ethers 0.04Kg; white lime 1.8Kg; silicon ash 0.24Kg, methyl cellulose ether 0.048Kg, methylhydroxypropylcellulose ether 0.096Kg; methyl carboxyethyl cellulose ether 0.048Kg; 6mm polypropylene anti-crack fiber 0.050Kg, 12mm polypropylene anti-crack fiber 0.050Kg, air entrapment agent 0.018Kg.
Embodiment 2:
Each amount of substance that special masonry mortar for self-insulating wall comprised is: P.O42.5 cement 35.8Kg; high-alumina cement 2.6Kg; flyash 6.0Kg; active haydite ore in sand form 10.6Kg, 30～70 order quartz sand (or yellow ground) 10.3Kg, 70～100 order quartz sand (or yellow ground) 4.4Kg; vitreous hollow beads 22Kg; redispersible latex powder 0.20Kg, modified alta-mud 4.3Kg, starch ethers 0.036Kg; white lime 2.2Kg; silicon ash 0.35Kg, methyl cellulose ether 0.036Kg, methylhydroxypropylcellulose ether 0.072Kg; methyl carboxyethyl cellulose ether 0.036Kg; 6mm polypropylene anti-crack fiber 0.055Kg, 12mm polypropylene anti-crack fiber 0.055Kg, air entrapment agent 0.020Kg.
Embodiment 3:
Each amount of substance that special masonry mortar for self-insulating wall comprised is: P.O42.5 cement 38Kg; high-alumina cement 3.2Kg; flyash 7Kg; active haydite ore in sand form 12Kg, 30～70 order quartz sand (or yellow ground) 10.96Kg, 70～100 order quartz sand (or yellow ground) 4.69Kg; vitreous hollow beads 20Kg; redispersible latex powder 0.18Kg, modified alta-mud 3.7Kg, starch ethers 0.30Kg; white lime 2.1Kg; silicon ash 0.5Kg, methyl cellulose ether 0.016Kg, methylhydroxypropylcellulose ether 0.048Kg; methyl carboxyethyl cellulose ether 0.024Kg; 6mm polypropylene anti-crack fiber 0.06Kg, 12mm polypropylene anti-crack fiber 0.06Kg, air entrapment agent 0.025Kg.
Embodiment 4:
Each amount of substance that special masonry mortar for self-insulating wall comprised is: P.O42.5 cement 41.5Kg; high-alumina cement 4.0Kg; flyash 8.5Kg; active haydite ore in sand form 14Kg, 30～70 order quartz sand (or yellow ground) 6.82Kg, 70～100 order quartz sand (or yellow ground) 2.92Kg; vitreous hollow beads 16Kg; redispersible latex powder 0.16Kg, modified alta-mud 3.6Kg, starch ethers 0.08Kg; white lime 1.6Kg; silicon ash 0.60Kg, methyl cellulose ether 0.010Kg, methylhydroxypropylcellulose ether 0.036Kg; methyl carboxyethyl cellulose ether 0.015Kg; 6mm polypropylene anti-crack fiber 0.065Kg, 12mm polypropylene anti-crack fiber 0.065Kg, air entrapment agent 0.030Kg.
Embodiment 5:
Each amount of substance that special masonry mortar for self-insulating wall comprised is: P.O42.5 cement 44.2Kg; high-alumina cement 4.8Kg; flyash 10Kg; active haydite ore in sand form 17Kg, 30～70 order quartz sand (or yellow ground) 4.0Kg, 70～100 order quartz sand (or yellow ground) 1.71Kg; vitreous hollow beads 12Kg; redispersible latex powder 0.14Kg, modified alta-mud 3.6Kg, starch ethers 0.08Kg; white lime 1.6Kg; silicon ash 0.65Kg, methyl cellulose ether 0.008Kg, methylhydroxypropylcellulose ether 0.024Kg; methyl carboxyethyl cellulose ether 0.012Kg; 6mm polypropylene anti-crack fiber 0.070Kg, 12mm polypropylene anti-crack fiber 0.070Kg, air entrapment agent 0.035Kg.
Special masonry mortar for self-insulating wall of the present invention can be used for building by laying bricks or stones of multiple materials for wall with self-heat conserving function such as concrete hollow block, autoclave aerated concrete building block brick, light porous brick, fly ash building block brick, mainly is the masonry project of thermally distinguishing the walling unit (brick) of newly-built covil construction or public building at the warm summer of cold district, area cold in winter and hot in summer or winter.
The bound value and the interval value of each raw material of the present invention can both be realized the present invention, and each cited raw material can both realize the present invention, just do not enumerate embodiment one by one at this.
The special masonry mortar that is used for self heat insulation wall provided by the invention, its basis " steam-pressing aero-concrete masonry mortar and plastering mortar " is standard (JC890-2001), increase the water-retentivity of masonry mortar, and satisfying the requirement of self-insulation system to heat conductivility and property durable in use, the special masonry mortar for self-insulating wall that works out reaches the performance index of table 2.Subordinate list
Table 1 vitreous hollow beads physical and chemical indexes
| Title | Index |
| Granularity/mm | 0.5-1.5 |
| Unit weight/(kg/m 3) | 80-120 |
| Balling ratio/% | 80-95 |
| Surface vitreous rate/% | ≥95％ |
| Water-intake rate/% (vacuum filtration method) | 35-50 |
| 1MP pressure volume rate of loss/% | 29-40 |
| Thermal conductivity | 0.035-0.047 |
| Refractoriness/℃ | 1280-1360 |
| Use temperature/℃ | ＜1000 |
Table 2 special masonry mortar for self-insulating wall main performance index
| Project | Build usefulness by laying bricks or stones |
| Dry density, kg/m 3 | ≤750 |
| Delamination degree, mm | ≤20 |
| Time of coagulation, h | When penetration resistance reaches 0.5MPa, 3～5 hours |
| Thermal conductivity, W/mk | ≤0.15 |
| Ultimate compression strength, MPa | ≥2.5 |
| Folding strength, MPa | - |
| Cohesive strength, MPa | ≥0.25 |
| Frost resistance 25 times, % | Mass loss≤5, loss of strength≤20 |
| Shrinkage | Shrinkage value≤1.1mm/m |
| Water retention, % | ≥80 |
Claims (3)
1. special masonry mortar for self-insulating wall, be pulverulent mixture, it is characterized in that component and parts by weight thereof that described special masonry mortar for self-insulating wall contains are: 52～68 parts of gelling material, 20～36 parts of graded aggregates, 12～25 parts of vitreous hollow beads, 0.2～0.26 part of redispersible latex powder, 3～12 parts of thickener rheology agents, 0.05～0.3 part of water-holding agent, 0.05～0.3 part of crack-resisting reinforcing agent, 0.012～0.035 part of air entrapment agent;
Described gelling material adopts the mixture of P.O42.5 cement, high-alumina cement, flyash and active haydite ore in sand form, its each ingredients constitute mortar gross weight umber is: 33.5～44.2 parts of P.O42.5 cement, 2.4～4.8 parts of high-alumina cements, 4.5～10 parts in flyash, 8.3～17 parts in active haydite ore in sand form; The physical and chemical indexes of described active haydite ore in sand form is: thermal conductivity is 0.23～0.55W/mk, and cylindrical compress strength is 1.1～1.3MPa;
Described graded aggregate adopts 30～70 orders and the quartz sand of two kinds of granularities of 70～100 orders or the mixture of yellow ground, and the two weight proportion is 7: 3;
The physical and chemical indexes of described vitreous hollow beads is: granularity 0.5～1.5mm, unit weight 80～120kg/m
3, balling ratio 80～95%, surperficial vitreous rate 〉=95%, water-intake rate 35～50%, 1MP pressure volume rate of loss 29～40%, thermal conductivity 0.035～0.047,1280～1360 ℃ of refractoriness, use temperature＜1000 ℃;
Described thickener rheology agent adopts the mixture of modified alta-mud, starch ethers, white lime and silicon ash, and its each ingredients constitute mortar gross weight umber is: 2.2～4.5 parts of modified alta-muds; 0.06～0.1 part in treated starch ether or composite starch ether, 0.6～3.2 part of white lime; 0.24～0.65 part of silicon ash;
Described water-holding agent adopts the mixture of methyl cellulose ether, methylhydroxypropylcellulose ether and methyl carboxyethyl cellulose ether, and its each ingredients constitute mortar gross weight umber is: 0.01～0.06 part of methyl cellulose ether, substitution value are 1.6～2.0; 0.03～0.18 part in methylhydroxypropylcellulose ether, substitution value are 1.2～2.0; 0.01～0.06 part in methyl carboxyethyl cellulose ether, substitution value are 1.5～2.0;
Described crack-resisting reinforcing agent adopts the polypropylene anti-crack fiber of grating specification, and length adopts 6～8mm and two kinds of specifications of 10～12mm, and the two weight proportion is 1: 1.
2. self-heat conserving mortar according to claim 1 is characterized in that: described redispersible latex powder adopts polyvinyl acetate (PVA)-ethylene copolymer, and its minimum film-forming temperature is 0 ℃.
3. self-heat conserving mortar according to claim 1 is characterized in that: described air entrapment agent adopts alkylbenzene sulfonate, and main component is a Sodium dodecylbenzene sulfonate.
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-
2007
- 2007-11-29 CN CN2007101685294A patent/CN101182178B/en not_active Expired - Fee Related
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| CN101182178A (en) | 2008-05-21 |
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