CN1139551C - External insulating mortar and its preparing process - Google Patents

External insulating mortar and its preparing process Download PDF

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Publication number
CN1139551C
CN1139551C CNB011071737A CN01107173A CN1139551C CN 1139551 C CN1139551 C CN 1139551C CN B011071737 A CNB011071737 A CN B011071737A CN 01107173 A CN01107173 A CN 01107173A CN 1139551 C CN1139551 C CN 1139551C
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China
Prior art keywords
cement
polystyrene foam
foam particles
mortar
thermal insulation
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CNB011071737A
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CN1305972A (en
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彭家惠
陈明凤
彭志辉
林常青
张建新
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Chongqing University
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Chongqing University
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Abstract

The present invention provides external insulation mortar and a preparation method thereof, which relates to external insulating mortar for external building walls and a preparation method thereof. The thermal insulation mortar mainly comprises cement, high molecular adhesive, polystyrene foam particles, fibers and water. The preparation method comprises the steps: the polystyrene foam satisfies the designated size, water is used for diluting the high molecular adhesive, the raw materials are proportionally weighed so as to modify surfaces of the polystyrene foam particles, and the raw materials are uniformly stirred. The thermal insulation mortar has the advantages of good workability and application property, high adhesive strength and good crack resistance and weatherability, and the thermal insulation mortar is mainly used as external thermal insulation mortar for external building walls and can be used as internal thermal insulation mortar for internal walls.

Description

External insulating mortar and preparation method
Technical field the present invention relates to skin external insulating mortar and preparation method.
The relevant both at home and abroad by retrieval scientific and technical literature of background technology, the report that relevant thermal insulation mortar Research And Engineering is used is more.At home, thermal insulation mortar is a light skeletal with the pearlstone mainly, is mixed with thermal insulation mortar with cement for the gelling material.This mortar water-intake rate is big, and splitting resistance is poor, and thermal property remains further to be improved, and need repeatedly survive during construction, and operating efficiency is lower, and is on-the-spot preparation, and its quality is wayward and guarantee that can only make the internal wall insulation mortar, using has its limitation.On " New Building Materials " the 1st phase of nineteen ninety, published " development of polystyrene insulation mortar and application ".This article has focused on the feasibility of the light skeletal of polystyrene foam do insulation mortar, and its technical feature, mortar mix ratio and constructional method have been done introduction.Component wherein is polystyrene foam particle, 425# ordinary Portland cement, perlite bulk cargo, the special-purpose binder mixture of development voluntarily about the about 4-6mm of diameter, and provided the volume ratio 1: 5: 2 that first three plants batching, and special-purpose binder mixture does not provide volume ratio, and just explanation therein " adds " in accordance with regulations.Its compound method is: by volume, wood bucket with customization is measured polystyrene foam particle, pouring the perlite bulk cargo into mortar mixes and stirs in the bucket or iron plate was gone up dry mixing 0.5-1 minute, pour partially mixed binding agent into, continue to mix and stir to the wetting of particulates of light skeletal, pour quantitative cement and binder mixture into while stirring again, churning time was controlled within 3 minutes.On 1999 " Building technologies " the 30th the 10th phase of volume, published " performance and the application of deposed polystyrene cement heat preserving mortar ".This article has mainly been introduced selected material, performance and the operating technique thereof of preparation deposed polystyrene cement heat preserving mortar.The selected material of this mortar is the waste polystyrene foam particle of particle diameter less than 6mm, the 425# ordinary Portland cement, sand, slaked lime powder, admixture, admixture wherein is gas tracting subtractive agent and compound additive, its preparation method is: get polystyrene foam particles at the construction field (site) ready, admixture and other common used materials, press the waste polystyrene foam particle: cement: admixture: slaked lime: sand=1-2: 1: 17%: 1 of cement volume: the volume ratio of 1-2, according to its purposes difference, by volume method is measured various materials and is poured in the mortar mixer, dry mixing 0.5 minute, the water that adds Total Water 80% again stirred 1-2 minute, added surplus water at last.This article has also briefly introduced this mortar performance, as intensity, heat retaining property, frost resistance, resistivity against fire.Though aforementioned two pieces of documents have related to the performance and the application of polystyrene foam thermal insulation mortar, but its basic physical and mechanical property, thermal property, drying shrinkage, splitting resistance, water tolerance, weathering resistance are goed deep into systematic research comprehensively, polystyrene foam combines with gelling material and the improvement of this thermal insulation mortar workability all mainly realizes by mixing more polymeric binder, cost is higher, and the title and the consumption of binding agent are not described, and do not see that this thermal insulation mortar makes the engineering application report of external wall outer insulation.
Summary of the invention the object of the present invention is to provide a kind of external insulating mortar and preparation method, not only successfully solved the affinity of inorganic coagulation material and polystyrene foam particles, the workability of external insulating mortar is good, the cohesive strength height, thermal property and application property are good, the better problem of heat insulation property, and splitting resistance and weathering resistance are good.
In order to realize the foregoing invention purpose, technical scheme of the present invention is:
External insulating mortar comprises following component and weight percent:
Cement 36-75
High polymer binder 0.35-5.8
Polystyrene foam particles 1.6-5.1
Fiber 0.07-0.12
Water 21-54
Wherein:
Cement is a kind of in the following cement:
425# or 525# Portland blast,
425# or 525# ordinary Portland cement,
425# or 525# Portland pozzolana cement,
425# or 525# Portland fly ash cement;
High polymer binder: ethene-vinyl acetate copolymer emulsion
Or benzene emulsion
Or ACRYLIC EMULSION
Or ethene-vinyl acetate emulsion copolymer powder;
Polystyrene foam particles: the polystyrene foam particles that the expandable polystyrene (EPS) foaming forms,
Or the particle that forms through fragmentation of waste polystyrene foam;
Fiber: polypropylene fibre,
Or nylon-6 fiber,
Or alkali resistant glass fiber,
Or vinylon fiber;
Add above-mentioned fiber, to improve the splitting resistance of this thermal insulation mortar.
In the composition of external insulating mortar, also can add following component, its weight percent:
0<coupling agent≤0.2
0<pearlstone≤2.8
0<special fine sand≤26
Wherein:
Coupling agent: sec.-propyl three isostearoyl base titanic acid ester
Or trolamine titanic acid ester
Or alkanolamine titanic acid ester.
The preparation method of external insulating mortar:
The granularity that makes polystyrene foam particles is more than or equal to 0.4mm, and smaller or equal to 5mm;
Water with the 30-100% of high polymer binder weight dilutes high polymer binder;
Press following component and weight percent: cement 36-75, high polymer binder 0.35-5.8, polystyrene foam particles 1.6-5.1, fiber 0.07-0.12, water 21-54 weigh up each raw-material weight;
P-poly-phenyl vinyl foam particle surface carries out modification to be handled;
With each raw material stirring mixing, churning time is 3-8 minute.
External insulating mortar workability and application property are good, the cohesive strength height, and splitting resistance, weathering resistance are good.
Test shows that unit dry weight is 500kg/m 3The thermal insulation mortar energy-to-break of level is 4.6 times with the unit weight swelling perlite heat-insulating mortar, is 2.6 times of sand-cement slurry, and its ultimate deformation amount is 4 times of swelling perlite heat-insulating mortar, 8 times of sand-cement slurry.Water-intake rate is 14.1%, and less than 30% of swelling perlite heat-insulating mortar, the loss of strength of its freeze-thaw cycle and drying and watering cycle also has only half of swelling perlite heat-insulating mortar.
Compare with the mortar that polystyrene foam particles directly mixes and stirs, polystyrene foam particles is after surface modification treatment, the physical and mechanical property of the thermal insulation mortar of being prepared is well improved, especially folding strength, tensile strength have improved 10.9% and 9.4% respectively, after mixing coupling agent, its folding strength and tensile strength have improved 18.8% and 15.1% respectively.
In order to improve silicate gelling material p-poly-phenyl vinyl foam particulate interfacial adhesion, improve thermal insulation mortar cohesiveness, workability and application property, need to adopt high polymer binder.By different structure, types of binders simultaneous test to performance impact, adopt a kind of binding agent ethene-vinyl acetate emulsion wherein, with the binding agent volume is that the mortar of 0 (being the benchmark mortar) is compared, when the volume of this binding agent is 1.6%, the folding strength of mortar has improved 16%, cohesive strength has improved 136%, when its volume is 5.0% left and right sides, the cohesive strength of mortar has improved nearly 2 times, folding strength has improved 40%, folding strength is 62.7% with the ratio of ultimate compression strength, and its toughness improves greatly.
Increase substantially the splitting resistance of thermal insulation mortar, the requirement of satisfying outdoor application is the key that thermal insulation mortar is used for outer insulation.The volume stability of material, toughness, pore structure and water-intake rate etc. are all relevant with splitting resistance.That the present invention adopts is fiber reinforced, reduce water-intake rate, improve pore structure, control gelling material use quantity, reduce contract with dry rate etc., improves its splitting resistance, to satisfy the needs of outer insulation.The present invention has tested the influence to thermal insulation mortar energy-to-break, maximum deformation quantity and other physical and mechanical property of volume identical polypropylene fibre, nylon-6 and alkali resistant glass fiber.Compare with the polystyrene foam thermal insulation mortar that does not mix fiber, mix that the ultimate compression strength of mortar slightly reduces behind the fiber, and folding strength, anti-folding and pressure-resisting ratio and energy-to-break all are improved, the fiber difference, the amplitude that improves is different, the effect of polypropylene fibre is best, and nylon-6 takes second place, and glass fibre is poor slightly.The maximum distortion of the energy-to-break of mixing the thermal insulation mortar behind the fiber when destroying all is improved.Test shows, the energy-to-break of mixing the thermal insulation mortar of polypropylene fibre improves 76.2%, the ultimate deformation amount improves 85.7%, the energy-to-break of mixing the thermal insulation mortar of nylon-6 improves 68.3%, the ultimate deformation amount improves 57.1%, the energy-to-break of mixing the thermal insulation mortar of alkali resistant glass fiber improves 53.5%, and the ultimate deformation amount improves 42.8%, so polypropylene fibre is toughness reinforcing best.From the alkali resistance and the dispersiveness of each fiber, polypropylene fibre is best.Dispersiveness that it is good and snappiness can guarantee mortar workability and application property, and good alkali resistance can guarantee the weather resistance of mortar again.
Test shows: the thermal conductivity of external insulating mortar is lower, and thermal property is better, and unit weight is 500kg/m 3The thermal conductivity of external insulating mortar be 0.103w/m 2K is less than the thermal conductivity of the perlite mortar of identical unit weight.The heat transfer coefficient of the combined wall of thick this external insulating mortar of 20mm and the thick perforated brick of 240mm is 1.29w/m 2K, the heat transfer coefficient that satisfies Chinese Xia Redong cryogenic region design standard for energy efficiency of buildings regulation is not more than 1.5w/m 2The requirement of k.
The present invention satisfies outer insulation requirement fully, and has been applied in the actual engineering through drying shrinkage, splitting resistance, water tolerance, atmospheric exposure test, particularly splitting resistance and weathering resistance check.
The embodiment specific embodiments of the invention, below each embodiment all represent with weight percent.
Embodiment 1:
525# Portland blast 47.48
Polystyrene foam particles 4.58
ACRYLIC EMULSION 4.5
Vinylon fiber 0.08
Water 43.36
30% water with ACRYLIC EMULSION weight dilutes ACRYLIC EMULSION.
Embodiment 2:
525# ordinary Portland cement 57
Polystyrene foam particles 2.57
Benzene emulsion 2.14
Alkali resistant glass fiber 0.10
Water 38.19
30% water with benzene emulsion weight dilutes benzene emulsion.
Embodiment 3:
525# Portland pozzolana cement 53.66
Polystyrene foam particles 2.41
Ethene-vinyl acetate copolymer emulsion 2.01
Nylon-6 0.07
Special fine sand 16.09
Water 25.76
50% water with ethene-vinyl acetate copolymer emulsion weight dilutes it.
Embodiment 4:
525# Portland fly ash cement 53.98
Polystyrene foam particles 3.24
Ethene-vinyl acetate copolymer emulsion 2.78
Pearlstone 2.7
Polypropylene fibre 0.09
Sec.-propyl three isostearoyl base titanic acid ester 0.08
Water 37.13
50% water with ethene-vinyl acetate copolymer emulsion weight dilutes it.
Embodiment 5:
425# ordinary Portland cement 47.74
Polystyrene foam particles 2.15
Ethene-vinyl acetate emulsion copolymer powder 0.4
Polypropylene fibre 0.06
Trolamine titanic acid ester 0.05
Special fine sand 25
Water 24.6
With 100% water of ethene-vinyl acetate emulsion copolymer grain weight amount, with its dilution.
Embodiment 6:
425# Portland blast 5.05
Polystyrene foam particles 5.02
Ethene-vinyl acetate copolymer emulsion 5.77
Sec.-propyl three isostearoyl base titanic acid ester 0.19
Polypropylene fibre 0.12
Pearlstone 2.52
Water 35.88
With 50% water of ethene-vinyl acetate copolymer emulsion weight, with its dilution.
Above-mentioned external insulating mortar can once claim required starting material foot stirring simultaneously to form; Also can be earlier that high polymer binder and the coupling agent of the high polymer binder behind the polystyrene foam particles dilute with water after with its moistened surface or dilute with water is wetting, the cement that adds the 8-15% of cement gross weight then, stirred 3-8 minute, make polystyrene foam particles fully by behind the cement parcel, again all the other starting material are all added, stir formulated; Also can with at room temperature be sealed by the polystyrene foam particles behind the cement parcel deposit 3-6 days after, again remaining starting material is added, stir formulated.

Claims (12)

1. external insulating mortar is characterized in that this mortar comprises following component and weight percent:
Cement 36-75
High polymer binder 0.35-5.8
Polystyrene foam particles 1.6-5.1
Fiber 0.07-0.12
Water 21-54
Wherein:
Cement: 425# or 525# Portland blast,
425# or 525# ordinary Portland cement,
425# or 525# Portland pozzolana cement,
425# or 525# Portland fly ash cement;
The used cement of mortar can be any cement in the above-mentioned cement;
High polymer binder: ethene-vinyl acetate copolymer emulsion
Or benzene emulsion
Or ACRYLIC EMULSION
Or ethene-vinyl acetate emulsion copolymer powder;
Polystyrene foam particles: the polystyrene foam particles that the expandable polystyrene (EPS) foaming forms
Or the particle that forms through fragmentation of waste polystyrene foam;
Fiber: polypropylene fibre
Or nylon-6 fiber
Or alkali resistant glass fiber
Or vinylon fiber.
2. external insulating mortar according to claim 1 is characterized in that adding in this thermal insulation mortar following component and weight percent:
0<coupling agent≤0.2
0<pearlstone≤2.8
0<special fine sand≤26
Wherein:
Coupling agent: sec.-propyl three isostearoyl base titanic acid ester
Or trolamine titanic acid ester
Or alkanolamine titanic acid ester;
Special fine sand: fineness modulus 0.6.
3. external insulating mortar according to claim 1 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
525# Portland blast 47.48
Polystyrene foam particles 4.58
ACRYLIC EMULSION 4.5
Vinylon fiber 0.08
Water 43.36.
4. external insulating mortar according to claim 1 and 2 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
525# ordinary Portland cement 57
Polystyrene foam particles 2.57
Benzene emulsion 2.14
Alkali resistant glass fiber 0.10
Water 38.19.
5. external insulating mortar according to claim 1 and 2 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
525# Portland pozzolana cement 53.66
Polystyrene foam particles 2.41
Ethene-vinyl acetate copolymer emulsion 2.01
Nylon-6 fiber 0.07
Special fine sand 16.09
Water 25.76.
6. external insulating mortar according to claim 1 and 2 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
525# Portland fly ash cement 53.98
Polystyrene foam particles 3.24
Ethene-vinyl acetate copolymer emulsion 2.78
Pearlstone 2.7
Polypropylene fibre 0.09
Sec.-propyl three isostearoyl base titanic acid ester 0.08
Water 37.13.
7. external insulating mortar according to claim 1 and 2 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
425# ordinary Portland cement 47.74
Polystyrene foam particles 2.15
Ethene-vinyl acetate emulsion copolymer powder 0.4
Polypropylene fibre 0.06
Trolamine titanic acid ester 0.05
Special fine sand 25
Water 24.6.
8. external insulating mortar according to claim 1 and 2 is characterized in that the concrete component and the weight percent of this thermal insulation mortar:
425# Portland blast 5.05
Polystyrene foam particles 5.02
Ethene-vinyl acetate copolymer emulsion 5.77
Sec.-propyl three isostearoyl base titanic acid ester 0.19
Polypropylene fibre 0.12
Pearlstone 2.52
Water 35.88.
9. the preparation method of an external insulating mortar is characterized in that this preparation method carries out in the following order:
The granularity that makes polystyrene foam particles is more than or equal to 0.4mm, and smaller or equal to 5mm;
Water with the 30-100% of high polymer binder weight dilutes high polymer binder;
By following component and weight percent
Cement 36-75
High polymer binder 0.35-5.8
Polystyrene foam particles 1.6-5.1
Fiber 0.07-0.12
Water 21-54 weighs up each raw-material weight;
P-poly-phenyl vinyl foam particle surface carries out modification to be handled;
With each raw material stirring 3-8 minute, mixing.
10. the preparation method of external insulating mortar according to claim 9 is characterized in that p-poly-phenyl vinyl foam particle surface carries out the method that modification handles and is:
With the polystyrene foam particles moistened surface, the cement of the 8-15% of cement gross weight is added polystyrene foam particles after wetting with the high polymer binder after the dilution, stirred 3-8 minute, it is wrapped up by cement.
11. the preparation method of external insulating mortar according to claim 10, it is characterized in that with the dilution after high polymer binder and coupling agent with the polystyrene foam particles moistened surface.
12. the preparation method of external insulating mortar according to claim 10 is characterized in that by at room temperature airtight the 3-6 of depositing days of the polystyrene foam particles behind the cement parcel.
CNB011071737A 2001-02-23 2001-02-23 External insulating mortar and its preparing process Expired - Fee Related CN1139551C (en)

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