CN110342888A - A kind of high ductility thermal insulation mortar - Google Patents
A kind of high ductility thermal insulation mortar Download PDFInfo
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- CN110342888A CN110342888A CN201910737852.1A CN201910737852A CN110342888A CN 110342888 A CN110342888 A CN 110342888A CN 201910737852 A CN201910737852 A CN 201910737852A CN 110342888 A CN110342888 A CN 110342888A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
It is composed of the following components the invention discloses a kind of high ductility thermal insulation mortar: 20~100 parts of cement, 0~80 part of mineral admixture, 5~40 parts of high-strength microballon gathers materials 0~35 part, and 10~50 parts of acrylate copolymer emulsion, 5~30 parts of water, 1~1.5 part of water-reducing agent, 0.75~6 part of fiber.The present invention adjusts the air bubble content and dry density of thermal insulation mortar without additional addition airentrapment material or preformed foam, by adjusting blender revolving speed and mixing time.The high ductility thermal insulation mortar dry density fluctuating range of preparation is small, and high-strength microballon is evenly distributed, without floating, and mixture surveys air content and design air content deviation is small, and fiber dispersion coefficient is high；The high ductile deformation's ability of mortar is strong, thermal coefficient is low, compression strength is high, high with bond matrix intensity；Simply, conveniently, raw material sources are extensive by preparation process.High ductility thermal insulation mortar disclosed by the invention can be applied to the heat-insulation and heat-preservation of wall and roofing, severe cold area concrete dam surface heat preservation etc..
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of high ductility thermal insulation mortar and its preparation process.
Background technique
Building exterior wall heat preserving provision for thermal insulation is that Indoor environment heat is distributed to outdoor or outdoor buildings are hot in order to reduce
It measures and is distributed to interior, to creating livable indoor environment and energy saving play an important role.Wall heat insulation material performance boost is
One important link of energy-saving building technology development.In hydraulic and hydroelectric engineering construction, in order to reduce the large volume of power plant dam
Temperature difference between inside and outside concrete and temperature gradient, reduce the cracking risk of mass concrete, and cold district and severe cold area are usually right
The dam body concrete of construction time or runtime carry out surface heat preservation.Therefore, thermal insulation material sets energy-saving and emission-reduction, raising basis
Construction quality is applied to be of great significance with operational safety.
Dam body heat preservation thermal insulation material used is similar under building exterior wall heat preserving and rigor condition.Thermal insulation material is big
Cause is divided into organic-based material and mineral-type materials.Organic type of foam thermal insulation material has molded polystyrene foams plate EPS, squeezes
Mould plate XPS, polyurathamc plate etc. or spray coating foaming polyurethane, pnenolic aldehyde foam material, glue powder polyphenyl particle mortar etc.；Nothing
Machine class has rock wool board, ceramic thermal insulation plate, foamed cement, foam concrete, lightweight concrete, foam mortar, expanded porous sand
Slurry, pearlite mortar, vermiculite mortar, float stone mortar etc..Merely from the point of view of thermal insulation property, these materials, which suffer from, lower leads temperature
Coefficient and lesser density, excellent thermal insulation performance, still, from the point of view of comprehensive performance, these materials suffer from respectively apparent lack
It falls into.
Organic insulation material weatherability is poor, burning point is low, flame retardant property is poor, and fire spreading is rapid after kindling, and release is big
Measure toxic and harmful gas.Inorganic thermal insulation material is to refuse combustible material, but intensity is low, frangible, easy to crack, easy unsticking, active time
It is shorter.Therefore, exploitation refuses combustion type green with comprehensive performances such as low thermal conductivity, high ductility, high compressive strength, high cohesive forces
Environment-friendly materials are the developing direction of building thermal insulation material.
Summary of the invention
For the conflicting problem of current Conventional insulation thermal insulation property and deformation performance, mechanical property, the present invention
There is provided one kind not only has low thermal conductivity, low dry density, but also the height with high ductile performance, high compressive strength and high cementitiousness
Ductility thermal insulation mortar.Meanwhile needing to add dedicated bleed component with the preparation of conventional vacuum mortar, or prefabricated bubble is needed to mix sand
The technology path for starching mixture is different, and the present invention had both been not necessarily to additionally add airentrapment material, also need not preformed foam, preparation process is simple
Singly, conveniently.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of high ductility thermal insulation mortar, the material are composed of the following components according to mass fraction: 20~100 parts of cement,
0~80 part of mineral admixture, 5~40 parts of high-strength microballon gathers materials 0~35 part, and 10~50 parts of acrylate copolymer emulsion, water 5~
30 parts, 1~1.5 part of water-reducing agent, 0.75~6 part of fiber.
The cement is one of common portland cement, moderate-heat portland cement, low-heat portland cement, intensity etc.
Grade >=42.5.
The mineral admixture is I grades or II grades of F class flyash, S75 grades and the above slag, SiO2The silicon of content >=95%
Powder.
The high-strength microballon main component is soda lime borosilicate, 350~650kg/m of apparent density3, bulk density
200~375kg/m3, volume mean diameter D (4,3)≤200 μm, 25~150MPa of compression strength, thermal coefficient≤0.06W/ (m
K)。
It is described to gather materials for one of levigate quartz sand, river sand, Machine-made Sand or CHARACTERISTICS OF TAILINGS SAND, nominal maximum particle diameter 5mm, fineness
Modulus 1.6~3.0 meets the technical requirements of sand and fine sand in GB/T14684-2011 " construction sand ".
The acrylate copolymer emulsion agglomerates concentration >=50g/L, solid content >=35%.
The water-reducing agent is high-performance water reducing agent, water-reducing rate >=25%.
The fiber be polypropylene fibre or vinal, 6~12mm of fibre length, 20~40 μm of equivalent diameter.
When high ductility thermal insulation mortar design compression strength≤15MPa, use elasticity modulus for the polypropylene fibre of >=3.0GPa；High ductility
When thermal insulation mortar designs compression strength > 15MPa, use elasticity modulus for the vinal of >=30GPa.
A kind of high ductility thermal insulation mortar, 0.04~0.15W/ of thermal coefficient (mK), limit stretch value 0.5~
5.0%, 5.0~40.0MPa of compression strength, with base concrete 1.0~3.5MPa of cohesive force, 500~1500kg/ of dry density
m3。
A kind of high ductility thermal insulation mortar, the dry density wave of test specimen obtained by different parts sampling in mixer hopper
Dynamic amplitude≤2.0%, mixture survey air content and design air content deviation≤10%, fiber dispersion coefficient >=0.90.
A kind of high ductility thermal insulation mortar, preparation process are as follows:
(1) by cement, mineral admixture, high-strength microballon, gather materials, the raw materials such as water-reducing agent and water are added Double-horizontal-shaft forced action type and stir
Machine is mixed, 1~3min is stirred with the slow-speed of revolution of 100~150rpm, is uniformly mixed each component；
(2) mixture is added in acrylate copolymer emulsion, 1~3min is stirred with the slow-speed of revolution of 100~150rpm, is made
The slurry of Uniform Flow；
(3) under the slow-speed of revolution stirring of 100~150rpm, fiber is uniformly sprinkled into slurry, 1~2min completes fine
Dimension addition；
(4) 3~10min is stirred quickly with the high revolving speed not less than 600rpm, so that fiber is uniformly dispersed, and introduce micro- gas
Bubble, is made high ductility thermal insulation mortar；Determine that mixing time, mixing time are got over according to the design dry density of high ductility thermal insulation mortar
Long, the dry density of high ductility thermal insulation mortar is smaller.
High-strength microballon is a kind of White hollow spherical shape Ultralight inorganic non-metallic material, and main component is soda lime borosilicate
Hydrochlorate, has that thermal coefficient is low, compression strength is high, density is small, water absorption rate is low, good fluidity, the physical characteristics such as corrosion-resistant.It is thermally conductive
Coefficient≤0.06W/ (mK), apparent density is in 350~650kg/m3, 200~375kg/m of bulk density3, volume mean diameter D
(4,3)≤200 μm, 25~150MPa of compression strength.Make full use of that high-strength microballon thermal coefficient is low, compression strength is high and density is small
Characteristic significantly reduce the thermal coefficient and dry density of high ductility thermal insulation mortar as gathering materials for high ductility thermal insulation mortar,
The compression strength of mortar is improved simultaneously.The present invention is in the raw material selection for carrying out thermal insulation mortar, it is desirable that the resistance to compression of high-strength microballon
Intensity is 3 times of thermal insulation mortar design strength or more, it is ensured that high-strength microballon does not become the weakness for reducing thermal insulation mortar compression strength
Link ensures that two kinds of performances such as the low temperature diffusivity of thermal insulation mortar and high compressive strength can be achieved at the same time.
Acrylate copolymer emulsion can generate a large amount of small closed air bubbles in high-speed stirred, can be with using the characteristic
By controlling mixing time, the air bubble content of high ductility thermal insulation mortar is improved, the mesh for reducing thermal coefficient, reducing bulk density is reached
's.Therefore, when preparing high ductility thermal insulation mortar using acrylate copolymer emulsion, airentrapment material is added without additional, without
Production foam in advance, not only reduces costs, and simplify and reduce production process.In addition, utilizing acrylic ester copolymer cream
The light fine grained of high-strength microballon is evenly wrapped in inside mortar, high-strength microballon is avoided to generate drift because density is small by the high cohesion of liquid
Floating phenomenon.As polymer, acrylate copolymer emulsion also adds the toughness of high ductility thermal insulation mortar, improves mortar
Non-deformability, reduces the water absorption rate of thermal insulation mortar, and water absorption rate is fallen below 2.0% or less.
Fiber is the core material for guaranteeing mortar ductile performance.The elasticity modulus of polypropylene fibre is generally 3.0~
10GPa, the general 30~45GPa of the elasticity modulus of high strength high modulus polyvinyl alcohol fiber.In order to allow the elasticity modulus and mortar of fiber
Elasticity modulus match, give full play to the bridge effect and energy-absorbing capacity of fiber, improve the ductile performance of thermal insulation mortar,
According to the compression strength size of thermal insulation mortar matrix, fibrous material is selected stage by stage.High ductility thermal insulation mortar designs compression strength
When≤15MPa, use elasticity modulus for the polypropylene fibre of >=3.0GPa；High ductility thermal insulation mortar designs compression strength >
When 15MPa, use elasticity modulus for the vinal of >=30GPa.In view of the performance test of thermal insulation mortar elasticity modulus is difficult
Spend it is larger, therefore, the judging quota selected using mortar compression strength as fiber species.
The formulation of the preparation process of high ductility thermal insulation mortar, it is contemplated that following factor: 1) high-strength microballon be evenly distributed,
Without floating, 2) number of bubbles is moderate, 3) fiber is evenly distributed.
Obtain good thermal insulation property it may first have to guarantee that the high-strength bead particles of light hollow are evenly distributed.It is high-strength
Microballon is as light granules, and apparent density is in 350~650kg/m3, the far smaller than density of water easily generates in mixture
Floating.In order to solve this problem, the first step is to carry out pre-dispersed, by high-strength microballon and cement, mineral admixture, gathers materials, subtracts
The raw materials such as aqua and water are added blender and stir at low speed, and are uniformly mixed, and second step utilizes acrylate copolymer emulsion polymer
High-strength bead particles are wrapped in inside slurry by high cohesion energy.Multi-step mixing technique both ensure that high-strength microballon was fully dispersed
With it is evenly dispersed, in turn avoid the generation of hydro-planing.
Ductility refers to the high ductibility energy that material shows under stretching or shear load effect.Fiber is evenly dispersed to be
Thermal insulation mortar obtains the premise of high ductility.In high ductility thermal insulation mortar, the volume of fiber is higher, and volume volume can reach
5%, it is 30~50 times of common thermal insulation concrete fibers content.If fiber is disposably put into mixture high speed to stir
It mixes, be easy to cause clustering phenomena.Therefore, under the state that stirs at low speed, it is slowly sprinkled into fiber, the effect tentatively dispersed can be played
Fruit avoids conglomeration, then in high-speed stirred, the shearing force that slurry is generated using paddle, and further progress high force dispersion,
Reaching makes the equally distributed effect of fiber.The present invention also passes through the synergistic effect of fiber, high-strength microballon and acrylate copolymer emulsion,
Using nominal maximum particle diameter 5mm, the middle sand of fineness modulus 1.6~3.0 and fine sand as gathering materials, high ductility heat preservation sand is prepared
Slurry has greatly expanded the partial size of the high ductility mortar-aggregate of tradition and the range of fineness modulus.
Number of bubbles is the important parameter for determining thermal insulation mortar thermal insulation property and dry density.Acrylate copolymer emulsion has
The characteristic of bubble is generated under high-speed stirred state, meanwhile, the fiber of large dosage can also draw in high-speed stirred into mixture
Enter a large amount of air, therefore, controls the revolving speed and mixing time of paddle, preset number of bubbles can be obtained, so that it is guaranteed that
The thermal insulation property of mortar.
The distributing homogeneity of high-strength microballon is evaluated with dry density fluctuating range, air content deviation and fiber dispersion coefficient respectively
Can, the moderate property of number of bubbles and fiber be evenly distributed performance.Preparation process according to the present invention, high ductility obtained keep the temperature sand
Dry density fluctuating range≤2.0% of the test specimen obtained by different parts sampling in mixer hopper is starched, mixture surveys air content
And design air content deviation≤10%, fiber dispersion coefficient >=0.90.
Dry density fluctuating range is tested, at sample position >=3, calculation method are as follows:
Air content deviation calculation method are as follows:
In the patent applied before, " non-conductive fine organic fiber is hardening first and second inventor according to the present invention
The evaluation method Calculation Estimation established in method of evaluating performance (application number 201210589652.4) in cement-base composite material "
The fiber dispersion coefficient α of fiber dispersion effect.
In formula: α is fiber dispersion coefficient, and n is the number of two dimensional image selected by test specimen cut surface, n >=30；XiFor examination
In part cut surface in i-th image fiber radical；For the average value of number of fiber in all images after test specimen cutting.
Compared with routine techniques, innovation of the invention is:
1) it without additionally adding dedicated airentrapment material or preformed foam, can be obtained by the adjustment of preparation technology parameter pre-
If air bubble content and dry density；
2) by the compression strength of matching microballon and thermal insulation mortar, coordinate the mechanical property and thermal insulation property of thermal insulation mortar,
It is prepared for high-intensitive, low thermal conductivity thermal insulation mortar；
3) according to the size of thermal insulation mortar compression strength, the fiber species of dual extension-compression modulus is precisely selected, are effectively improved
The ductile performance of thermal insulation mortar.
The beneficial effects of the present invention are:
High ductility thermal insulation mortar has both high heat preservation performance, high deformation performance and strong mechanical performance.
Conventional vacuum mortar must sacrifice its compression strength, JG/T 266-2011 " bubble when improving thermal insulation property
Foam concrete " in foam concrete maximum compression strength only 20MPa, 20MPa are the bottlenecks of the prior art.When thermal insulation mortar intensity
When reduction, the mortar ratio of mud is big, aqueous more in mortar, and it is poorer to be easily deformed cracking, adhesive property.Conventional vacuum mortar passes through
Add 0.9~2.6kg/m3The fiber of (about 1~2 ‰ volume volume) improves the anti-contracility energy of mortar；Thermal insulation mortar is outside
Broken once pressing under portion's load action, basic nil ductility can be sayed.The present invention by introduce high compressive strength, low thermal conductivity it is high-strength
Bead particles are aided with acrylate copolymer emulsion as toughening polymer, match suitable preparation process as gathering materials, and coordinate
Contradiction between thermal insulation property and deformation performance and mechanical property is prepared for 5.0~40.0MPa of compression strength, limit stretch value
0.5~5.0% high ductility thermal insulation material.
High ductility thermal insulation mortar is prepared without additional addition airentrapment material or preformed foam.
When traditional handicraft prepares thermal insulation mortar, in order to improve thermal insulation property, dedicated draw usually is mixed in mortar mixture
Gas material, such as concrete air-entrainer, aluminium powder foaming agent improve air vent content in thermal insulation mortar, to improve thermal insulation property；Or
Person prepares foaming agent (such as hydrogen peroxide, rosin tree lipid foaming agent, vegetable protein foaming agent, animal protein foaming agent, compound hair
Infusion) aqueous solution, in the case where mechanicals efforts introduce air, hydrogen, nitrogen, carbon dioxide or oxygen, prefabrication size is equal
Then as needed even fine foam adds appropriate foam in mortar mixture, prepares thermal insulation mortar.The present invention utilizes
Lightweight, the high-strength microballon that high-strength, closing is hollow utilize quickly stirring acrylate copolymer emulsion and fibre as heat preservation component
Dimension, introduces a large amount of micro-bubbles in mortar, without additional addition airentrapment material or prior preformed foam.By adjusting Double-horizontal-shaft
The revolving speed and mixing time of blender, adjust the air content of mixture, obtain preset air bubble content and dry density, preparation process
More simply, conveniently.
Fire resistance is high, environmentally protective.
Common polyphenyl particle heat-insulating mortar, polyurethane heat-insulation mortar, styrofoam, extruded polyethylene insulation board, XPS plate etc. are protected
Adiabator has inflammable, the strong smog of generation, the easily characteristics such as release toxic gas.High ductility thermal insulation mortar is compound as cement base
Material, main component are inorganic material, do not burn when meeting with fire, are to refuse combustible material, do not generate toxic and harmful gas, pole
The earth improves the fire resistance and environmental-protecting performance of thermal insulation mortar.
Specific embodiment
The present invention will be further explained combined with specific embodiments below.
Raw materials are commercially available material, and specific manufacturer is as follows:
High-strength microballon is produced by Nanjing R&D Construction Technology Co., Ltd..Ordinary portland cement and portland cement are peace
The production of emblem conch cement limited liability company.Moderate-heat portland cement and low-heat portland cement are that good magnificent special cement share has
The production of limit company.Acrylate copolymer emulsion is the production of Nanjing Yongfeng Co., Ltd.Flyash is Nanjing Cogeneration Power Plant production, mine
Slag is produced by Ma'anshan Iron and Steel Co., Ltd, and silicon powder is produced by Ai Ken international trade (Shanghai) Co., Ltd..High-performance subtracts
Aqua is produced by Jiangsu Subotexin Material Co., Ltd.Polypropylene fibre is given birth to by Beijing ZhongFang XianJian Science Co., Ltd
It produces, vinal is produced by Yongan City, Fujian Province Po Lam industry development Co., Ltd.Water is common drinking public water supply.River sand is south
Capital the Changjiang river river sand, quartz sand are the production of Nanjing Sen Shi quartz sand Co., Ltd, and tailings is by Baogang Group Shanghai MeiShan Co., Ltd
Production.
Embodiment 1
Material composition ratio is as shown in table 1:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 1
Cement is 42.5 ordinary portland cement of PO；High-strength microballon apparent density 650kg/m3, bulk density 375kg/
m3, 200 μm, compression strength 150MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3) (mK)；Fine aggregate is river sand, carefully
Spend modulus 2.6, maximum particle diameter 5mm；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water is to drink originally
Water；Water-reducing agent is polycarboxylate high performance water-reducing agent, water-reducing rate 25%；Fiber is vinal, 40 μm of equivalent diameter, bullet
Property modulus 39GPa, length 12mm.
The revolving speed of high-speed stirred is 600rpm, mixing time 3min.
3 position test specimen dry density fluctuating ranges 1.68% survey air content and design air content deviation 5.6%, fiber
The coefficient of dispersion 0.92.Thermal insulation mortar thermal coefficient 0.15W/ (mK), dry density 1490kg/m3, compression strength 42.3MPa, pole
Tension values 5.5% are limited, with base concrete adhesion strength 3.7MPa.
Embodiment 2
Material composition ratio is as shown in table 2:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 2
Cement is 42.5 moderate-heat portland cement of PMH；Silicon ash SiO2Content 95%；High-strength microballon apparent density
650kg/m3, bulk density 375kg/m3, 200 μm, compression strength 150MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3)
(m·K)；Fine aggregate is quartz sand, fineness modulus 3.0, maximum particle diameter 5mm；Acrylate copolymer emulsion cohesion concentration 52g/L,
Solid content 40%；Water is drinking public water supply；Water-reducing agent is polycarboxylate high performance water-reducing agent, water-reducing rate 30%；Fiber is poly- second
Enol fiber, 40 μm of equivalent diameter, elasticity modulus 39GPa, length 6mm.
The revolving speed of high-speed stirred is 650rpm, mixing time 4min.
6 position test specimen dry density fluctuating ranges 1.72% survey air content and design air content deviation 7.3%, fiber
The coefficient of dispersion 0.94.Thermal insulation mortar thermal coefficient 0.12W/ (mK), dry density 1320kg/m3, compression strength 40.8MPa, pole
Tension values 5.2% are limited, with base concrete adhesion strength 3.2MPa.
Embodiment 3
Material composition ratio is as shown in table 3:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 3
Cement is 42.5 low-heat portland cement of PLH；S75 grades of slags；High-strength microballon apparent density 650kg/m3, heap
Product density 375kg/m3, 200 μm, compression strength 150MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3) (mK)；Thin collection
Material is tailings, fineness modulus 2.3, maximum particle diameter 5mm；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water
For drinking public water supply；Water-reducing agent is polycarboxylate high performance water-reducing agent, water-reducing rate 30%；Fiber is vinal, equivalent
20 μm of diameter, elasticity modulus 39GPa, length 12mm.
The revolving speed of high-speed stirred is 700rpm, mixing time 5min.
4 position test specimen dry density fluctuating ranges 1.72% survey air content and design air content deviation 3.5%, fiber
The coefficient of dispersion 0.96.Thermal insulation mortar thermal coefficient 0.11W/ (mK), dry density 1160kg/m3, compression strength 27.6MPa, pole
Tension values 3.3% are limited, with base concrete adhesion strength 2.6MPa.
Embodiment 4
Material composition ratio is as shown in table 4:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 4
Cement is 42.5 portland cement of PII；I grades of flyash of F class；High-strength microballon apparent density 450kg/m3, accumulation
Density 265kg/m3, 195 μm, compression strength 65MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3) (mK)；Fine aggregate
For Machine-made Sand, fineness modulus 1.6, maximum particle diameter 5mm；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water
For drinking public water supply；Water-reducing agent is polycarboxylate high performance water-reducing agent, water-reducing rate 25%；Fiber is polypropylene fibre, and equivalent is straight
20 μm of diameter, elasticity modulus 3.0GPa, length 12mm.
The revolving speed of high-speed stirred is 750rpm, mixing time 6min.
3 position test specimen dry density fluctuating ranges 1.71% survey air content and design air content deviation 1.8%, fiber
The coefficient of dispersion 0.93.Thermal insulation mortar thermal coefficient 0.10W/ (mK), dry density 875kg/m3, compression strength 15.3MPa, the limit
Tension values 2.1%, with base concrete adhesion strength 2.4MPa.
Embodiment 5
Material composition ratio is as shown in table 5:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 5
Cement is 52.5 ordinary portland cement of PO；II grades of flyash of F class；S95 grades of slags；High-strength microballon is apparently close
Spend 450kg/m3, bulk density 265kg/m3, 195 μm, compression strength 65MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3)
(m·K)；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water is drinking public water supply；Water-reducing agent is polycarboxylic acids
Series high-performance dehydragent, water-reducing rate 35%；Fiber is polypropylene fibre, 40 μm of equivalent diameter, elasticity modulus 5.0GPa, length
6mm。
The revolving speed of high-speed stirred is 800rpm, mixing time 6min.
4 position test specimen dry density fluctuating ranges 1.79% survey air content and design air content deviation 8.9%, fiber
The coefficient of dispersion 0.95.Thermal insulation mortar thermal coefficient 0.075W/ (mK), dry density 780kg/m3, compression strength 12.8MPa, pole
Tension values 1.3% are limited, with base concrete adhesion strength 1.9MPa.
Embodiment 6
Material composition ratio is as shown in table 6:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 6
Cement is 62.5 ordinary portland cement of PO；S105 grades of slags；Silicon powder SiO2Content 95%；High-strength microballon table
See density 450kg/m3, bulk density 265kg/m3, 195 μm, compression strength 65MPa of volume mean diameter D (4,3), thermal coefficient
0.06W/(m·K)；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water is drinking public water supply；Water-reducing agent is
Polycarboxylate high performance water-reducing agent, water-reducing rate 27%；Fiber is polypropylene fibre, 40 μm of equivalent diameter, elasticity modulus 5.0GPa,
Length 12mm.
The revolving speed of high-speed stirred is 850rpm, mixing time 8min.
3 position test specimen dry density fluctuating ranges 1.60% survey air content and design air content deviation 8.2%, fiber
The coefficient of dispersion 0.98.Thermal insulation mortar thermal coefficient 0.06W/ (mK), dry density 625kg/m3, compression strength 9.7MPa, the limit
Tension values 0.9%, with base concrete adhesion strength 1.4MPa.
Embodiment 7
Material composition ratio is as shown in table 7:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 7
Cement is 52.5 portland cement of PII；I grades of flyash of F class；S75 grades of slags；High-strength microballon apparent density
400kg/m3, bulk density 230kg/m3, 180 μm, compression strength 35MPa, thermal coefficient 0.06W/ of volume mean diameter D (4,3)
(m·K)；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water is drinking public water supply；Water-reducing agent is polycarboxylic acids
Series high-performance dehydragent, water-reducing rate 27%；Fiber is polypropylene fibre, 20 μm of equivalent diameter, elasticity modulus 5.0GPa, length
6mm。
The revolving speed of high-speed stirred is 900rpm, mixing time 9min.
6 position test specimen dry density fluctuating ranges 1.51% survey air content and design air content deviation 9.7%, fiber
The coefficient of dispersion 0.92.Thermal insulation mortar thermal coefficient 0.04W/ (mK), dry density 530kg/m3, compression strength 6.2MPa, the limit
Tension values 0.7%, with base concrete adhesion strength 1.3MPa.
Embodiment 8
Material composition ratio is as shown in table 8:
The high ductility thermal insulation mortar material mating ratio (mass fraction) of table 8
Cement is PO 52.5R ordinary portland cement；I grades of flyash of F class；S105 grades of slags；Silicon powder SiO2Content
95%；High-strength microballon apparent density 400kg/m3, bulk density 230kg/m3, 180 μm of volume mean diameter D (4,3), compression strength
35MPa, thermal coefficient 0.06W/ (mK)；Acrylate copolymer emulsion agglomerates concentration 52g/L, solid content 40%；Water is to drink
Tap water；Water-reducing agent is polycarboxylate high performance water-reducing agent, water-reducing rate 30%；Fiber is polypropylene fibre, 40 μm of equivalent diameter,
Elasticity modulus 5.0GPa, length 12mm.
The revolving speed of high-speed stirred is 1000rpm, mixing time 10min.
3 position test specimen dry density fluctuating ranges 1.01% survey air content and design air content deviation 7.4%, fiber
The coefficient of dispersion 0.95.Thermal insulation mortar thermal coefficient 0.038W/ (mK), dry density 495kg/m3, compression strength 6.1MPa, the limit
Tension values 0.6%, with base concrete adhesion strength 1.1MPa.
High ductility thermal insulation mortar in 1~example of example 8 the preparation method is as follows:
Preparation process is as follows:
(1) by cement, mineral admixture, high-strength microballon, gather materials, the raw materials such as water-reducing agent and water are added Double-horizontal-shaft forced action type and stir
Machine is mixed, 2min is stirred with the slow-speed of revolution of 120rpm, is uniformly mixed each component；
(2) mixture is added in acrylate copolymer emulsion, 2min is stirred with the slow-speed of revolution of 120rpm, Uniform Flow is made
Slurry；
(3) under the slow-speed of revolution stirring of 120rpm, it is uniformly sprinkled into fiber into slurry, completes fiber in 1min and adds
Add；
(4) 3~10min is stirred quickly with the high revolving speed not less than 600rpm, so that fiber is uniformly dispersed, and introduce micro- gas
Bubble, is made high ductility thermal insulation mortar；Determine that mixing time, mixing time are got over according to the design dry density of high ductility thermal insulation mortar
Long, the dry density of high ductility thermal insulation mortar is smaller.
High ductility thermal insulation mortar dry density fluctuating range prepared by the present invention is small, and high-strength microballon is evenly distributed, without floating, mixes
It closes object actual measurement air content and design air content deviation is small, fiber dispersion coefficient；The high ductile deformation's ability of mortar is strong, thermal coefficient
It is low, compression strength is high, high with bond matrix intensity；Simply, conveniently, raw material sources are extensive by preparation process.It is disclosed by the invention
High ductility thermal insulation mortar is non-combustible, with substrate old concrete cooperative transformation, be not easy unsticking, can be applied to the heat-insulated of wall and roofing
Heat preservation, severe cold area concrete dam surface heat preservation etc..
The testing method of correlated performance is as follows in 1~example of example 8:
According to JG/T 266-2011 " foam concrete ", carry out the thermal coefficient of high ductility thermal insulation mortar, compression strength and
Dry density performance test；According to " the high ductility fiber reinforced cement-based composite material mechanical property test side JC/T 2461-2018
Method " carry out limit stretch value performance test；According to JTS 311-2011 " marine structure repairing and reinforcing technical specification " into
Row adhesive property is surveyed；Mixture air content is carried out according to JGJ/T 70-2009 " building mortar basic performance tests method standard "
Test.
Claims (10)
1. a kind of high ductility thermal insulation mortar, which is characterized in that the material is composed of the following components according to mass fraction: cement 20
~100 parts, 0~80 part of mineral admixture, 5~40 parts of high-strength microballon gathers materials 0~35 part, acrylate copolymer emulsion 10~50
Part, 5~30 parts of water, 1~1.5 part of water-reducing agent, 0.75~6 part of fiber.
2. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the cement is common Portland water
One of mud, moderate-heat portland cement, low-heat portland cement, strength grade >=42.5.
3. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the mineral admixture be I grades or
II grades of F class flyash, S75 grades and the above slag, SiO2The silicon powder of content >=95%.
4. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the high-strength microballon main component is
Soda lime borosilicate, thermal coefficient≤0.06W/ (mK), 350 ~ 650 kg/m of apparent density3, bulk density 200 ~ 375
kg/m3, volume mean diameter D (4,3)≤200 μm, 25~150MPa of compression strength.
5. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that it is described gather materials for levigate quartz sand,
One of river sand, Machine-made Sand or CHARACTERISTICS OF TAILINGS SAND, nominal maximum particle diameter 5mm, fineness modulus 1.6~3.0.
6. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the acrylate copolymer emulsion is solidifying
Poly- concentration >=50g/L, solid content >=35%；The water-reducing agent is high-performance water reducing agent, water-reducing rate >=25%.
7. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the fiber be polypropylene fibre or
Vinal, 6~12mm of fibre length, 20~40 μm of equivalent diameter；High ductility thermal insulation mortar design compression strength≤
When 15MPa, use elasticity modulus for the polypropylene fibre of >=3.0GPa；High ductility thermal insulation mortar designs compression strength > 15MPa
When, use elasticity modulus for the vinal of >=30GPa.
8. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that 0.04~0.15W/ of thermal coefficient
(mK), limit stretch value 0.5~5.0%, 5.0~40.0MPa of compression strength, with base concrete cohesive force 1.0~
3.5MPa, 500~1500kg/m of dry density3。
9. a kind of high ductility thermal insulation mortar according to claim 1, which is characterized in that the different parts in mixer hopper
Dry density fluctuating range≤2.0% of sampling gained test specimen, mixture survey air content and design air content deviation≤10%, fiber
The coefficient of dispersion >=0.90.
10. a kind of preparation method of high ductility thermal insulation mortar described in any one of claim 1 to 9, which is characterized in that packet
Include following steps:
(1) by cement, mineral admixture, high-strength microballon, gather materials, the stirring of Double-horizontal-shaft forced action type is added in the raw materials such as water-reducing agent and water
Machine, slow-speed of revolution stirring are uniformly mixed each component；
(2) mixture is added in acrylate copolymer emulsion, the slurry that Uniform Flow is made is stirred in the slow-speed of revolution；
(3) under slow-speed of revolution stirring, it is uniformly sprinkled into fiber into slurry, completes fiber addition；
(4) 3~10min is stirred quickly with the high revolving speed not less than 600rpm, so that fiber is uniformly dispersed, and introduce microbubble, made
Obtain high ductility thermal insulation mortar；Mixing time is determined according to the design dry density of high ductility thermal insulation mortar, and mixing time is longer, Gao Yan
The dry density of property thermal insulation mortar is smaller.
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| CN112266214A (en) * | 2020-10-31 | 2021-01-26 | 娄底市新越鼎建材科技有限公司 | Sandwich integrated external wall insulation board and preparation method thereof |
| CN114057439A (en) * | 2021-12-15 | 2022-02-18 | 山东银王建筑工程有限公司 | Elastic mortar for building exterior wall and preparation process thereof |
| CN115057670A (en) * | 2022-03-30 | 2022-09-16 | 上海二十冶建设有限公司 | Fast-hardening high-ductility inorganic sealing mortar |
| CN115626801A (en) * | 2022-11-01 | 2023-01-20 | 冯建鹏 | Anti-crack mortar for external wall heat insulation |
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