CN111662055A - Preparation method of high-strength thermal insulation mortar - Google Patents
Preparation method of high-strength thermal insulation mortar Download PDFInfo
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- CN111662055A CN111662055A CN202010549959.6A CN202010549959A CN111662055A CN 111662055 A CN111662055 A CN 111662055A CN 202010549959 A CN202010549959 A CN 202010549959A CN 111662055 A CN111662055 A CN 111662055A
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/10—Acids or salts thereof containing carbon in the anion
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/122—Acids
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/12—Acids or salts thereof containing halogen in the anion
- C04B22/126—Fluorine compounds, e.g. silico-fluorine compounds
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2676—Polystyrenes
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
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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)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of high-strength thermal insulation mortar, and belongs to the technical field of building material preparation. The method comprises the following steps: s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry; s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 10-15min, and standing for 30-60 min; s3: and (4) adding calcium fluoride, styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring by using a stirrer to prepare the high-strength thermal insulation mortar. The high-strength thermal insulation mortar disclosed by the invention can improve the compressive strength and reduce the dry apparent density, the heat conductivity coefficient and the volume water absorption rate.
Description
The invention relates to split application of Chinese patent 'thermal insulation mortar and a preparation method thereof', wherein the application date is 12 months and 28 days in 2017, and the application number is 201711450097.6.
Technical Field
The invention belongs to the technical field of building material preparation, and particularly relates to a preparation method of high-strength thermal insulation mortar.
Background
At present, the requirements of civil building energy-saving engineering in China are higher and higher, and a large number of new building energy-saving materials and new processes are developed in the market; the heat-insulating mortar outer wall heat-insulating system plays a very important role in modern high-rise buildings. The reliable construction treatment is accepted by society, and is one of the heat preservation and insulation methods for the outer wall with the most comprehensive advantages at present. The heat-insulating mortar is dry powder for heat insulation of buildings, which is prepared by mixing inorganic lightweight aggregate, a cementing material, an additive, a filler and the like, when in use, water is added and mixed into slurry, the slurry is applied to a base layer working surface, and a heat-insulating layer is formed after the slurry is hardened. Most of inorganic heat-insulating lightweight aggregate is of a porous structure, and air hardly generates convection in gaps because of self sealing or wrapping and sealing of a cementing material in heat-insulating mortar. A large amount of porous lightweight aggregate is uniformly distributed in the thermal insulation mortar, so that the thermal conduction is greatly blocked, and the thermal insulation effect is achieved. The existing common thermal insulation mortar comprises expanded perlite thermal insulation mortar, expanded vermiculite thermal insulation mortar and vitrified microsphere thermal insulation mortar, wherein the vitrified microsphere thermal insulation mortar has excellent performance.
The Chinese invention patent document 'polystyrene foam particle thermal insulation mortar (patent number: ZL 200610025027.1)' discloses polystyrene foam thermal insulation mortar for internal and external walls of a building and a preparation method thereof, wherein the premixed polystyrene foam particle thermal insulation mortar comprises the following components in parts by weight: 65-88 parts of gelled material, 2-22 parts of mineral admixture, 0.1-2 parts of thickening agent, 0.1-0.4 part of air entraining agent, 1-2.5 parts of tackifier, 3-9 parts of polystyrene particles and 0-6 parts of building sand. The invention has the characteristics of good heat insulation effect and good integrity of a heat insulation system, but has the problems of low compressive strength of mortar and large heat conductivity coefficient, dry apparent density and shrinkage rate. The main disadvantages are: (1) the thermal conductivity coefficient of the thermal insulation mortar is large, and the thermal insulation performance needs to be improved. (2) The existing mortar preparation method and equipment can not meet the special requirements of thermal insulation mortar. The aggregate of the thermal insulation mortar has certain brittleness, and the thermal performance of the thermal insulation mortar is reduced due to the fact that the thermal insulation aggregate is damaged caused by unreasonable stirring process, overlong stirring time or overlarge stirring strength in the mortar preparation process. (3) At present, the construction mode of the thermal insulation mortar is mainly manual plastering, generally, the thermal insulation mortar survives in multiple times, the time interval between two plasterings is longer, the curing and drying time of a thermal insulation layer is longer after the construction is finished, the construction period is long, and the efficiency is low.
Disclosure of Invention
The invention aims to provide thermal insulation mortar and a preparation method thereof, and aims to solve the technical problems of how to optimize components, dosage and the like, improve the compressive strength of the thermal insulation mortar and reduce the dry apparent density, the thermal conductivity and the volume water absorption rate on the basis of the thermal insulation mortar disclosed in the Chinese invention patent 'polystyrene foam particle thermal insulation mortar (patent number: ZL 200610025027.1').
In order to solve the technical problems, the invention adopts the following technical scheme:
the thermal insulation mortar comprises the following raw materials: portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, calcium carbonate, a tackifier, carboxyethyl methyl cellulose, sodium dodecyl sulfate, calcium fluoride, a styrene maleic anhydride copolymer or an organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid;
the weight ratio of the calcium fluoride, the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer, the sodium carbonate and the hydrochloric acid is (12-14): (10-16): (22-28): (4-7).
Preferably, the weight ratio of the calcium fluoride to the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer to the sodium carbonate to the hydrochloric acid is 13:15:26: 6.
Preferably, the thermal insulation mortar comprises the following raw materials in parts by weight: 96-120 parts of portland cement, 5-10 parts of fly ash, 6-12 parts of limestone powder, 10-15 parts of polystyrene particles, 9-12 parts of bentonite, 3-5 parts of a thickening agent, 4-7 parts of double flying powder, 4-6 parts of a tackifier, 2-4 parts of carboxyethyl methyl cellulose, 0.8-1.5 parts of sodium dodecyl sulfate, 12-14 parts of calcium fluoride, 10-16 parts of a styrene maleic anhydride copolymer or an organic silicon-polyurethane copolymer, 22-28 parts of sodium carbonate and 4-7 parts of hydrochloric acid.
Preferably, the thermal insulation mortar comprises the following raw materials in parts by weight: 112 parts of portland cement, 8 parts of fly ash, 10 parts of limestone powder, 14 parts of polystyrene particles, 10 parts of bentonite, 4 parts of a thickening agent, 6 parts of calcium peroxide, 5 parts of a tackifier, 3 parts of carboxyethyl methyl cellulose, 1.2 parts of sodium dodecyl sulfate, 13 parts of calcium fluoride, 15 parts of styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, 26 parts of sodium carbonate and 6 parts of hydrochloric acid.
Preferably, the thickener is a cellulose ether.
Preferably, the tackifier is ethylene-vinyl acetate copolymer latex powder.
Preferably, the molar concentration of the hydrochloric acid is 2-4 mol/L.
Furthermore, styrene maleic anhydride copolymers are one of the commonly used polymeric materials, and their manufacturing processes are known, which are described in detail in the literature, in particular US2971939, US2769804, CN 201480054732.7. The preparation method of the organic silicon-polyurethane copolymer is also the prior art and is described in CN201621433444.5 and CN 201610826047.2.
The invention also provides a preparation method of the thermal insulation mortar, which comprises the following steps:
s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry;
s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 10-15min, and standing for 30-60 min;
s3: and (4) adding calcium fluoride, styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring by using a stirrer to prepare the thermal insulation mortar.
Preferably, the stirring speed of the stirrer in the step S3 is 80-200 r/min.
The innovation of the invention is that: (1) the calcium fluoride can promote the foaming effect of the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer and the sodium carbonate in the thermal insulation mortar, a large number of micro bubbles are introduced into the mortar, and the independent, closed and fine bubbles can stably exist and be uniformly distributed in the thermal insulation mortar, so that the heat conductivity coefficient, the dry apparent density and the shrinkage rate of the thermal insulation mortar can be obviously reduced, the thermal insulation performance of the thermal insulation mortar is improved, and the workability of the thermal insulation mortar is enhanced. In addition, a large amount of fine bubbles introduced into the thermal insulation mortar play roles of lubrication and buffering, so that the inorganic lightweight aggregate is prevented from being directly contacted with the inner wall and the blades of the stirrer in the stirring process, the damage rate of the inorganic lightweight aggregate in the mortar stirring process is reduced, the discharge rate is improved, materials are saved, the closed pore porosity of the thermal insulation mortar is improved, and the dry apparent density, the heat conductivity coefficient and the volume water absorption of the thermal insulation mortar are reduced. (2) The foaming technology is utilized to prepare the foam type thermal insulation mortar, so that the thermal conductivity coefficient of the thermal insulation mortar can be effectively reduced, and the thermal insulation performance of the thermal insulation mortar is improved. In addition, the sodium carbonate has the function of quick setting, can shorten the time for curing and drying the heat-insulating layer, enables the heat-insulating mortar to be condensed in a short time, reduces the dry apparent density and improves the construction performance. (3) The styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer, the calcium fluoride and the sodium carbonate can form a net structure distributed disorderly in the thermal insulation mortar, so that crystal lattices are activated, solid phase reaction is accelerated, microcracks formed in the concrete at the early hardening stage are blocked in the development process and are difficult to develop further, and the crack resistance and the compressive strength of the thermal insulation mortar are improved.
The invention has the beneficial effects that: the calcium fluoride, the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer, the sodium carbonate and the hydrochloric acid play a synergistic role in preparing the thermal insulation mortar, the compressive strength of the thermal insulation mortar is synergistically improved, and the thermal conductivity coefficient, the dry apparent density and the shrinkage rate are reduced. The effect of promoting foaming by using sodium carbonate and hydrochloric acid generates a large amount of foam in the mortar, and the dry apparent density, the heat conductivity coefficient and the volume water absorption rate of the heat-insulating mortar are reduced; the characteristic that styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, calcium fluoride and sodium carbonate can form a disorderly distributed net structure in the thermal insulation mortar is utilized, and the crack resistance and the compressive strength of the thermal insulation mortar are improved.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
Example 1
The thermal insulation mortar comprises the following raw materials in parts by weight: 112 parts of portland cement, 8 parts of fly ash, 10 parts of limestone powder, 14 parts of polystyrene particles, 10 parts of bentonite, 4 parts of a thickening agent, 6 parts of double flying powder, 5 parts of a tackifier, 3 parts of carboxyethyl methyl cellulose, 1.2 parts of sodium dodecyl sulfate, 13 parts of calcium fluoride, 15 parts of a styrene maleic anhydride copolymer, 26 parts of sodium carbonate and 6 parts of hydrochloric acid.
The thickening agent is cellulose ether;
the tackifier is ethylene-vinyl acetate copolymer latex powder;
the molar concentration of the hydrochloric acid is 3 mol/L;
the preparation method of the thermal insulation mortar comprises the following steps:
s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry;
s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 14min, and standing for 50 min;
s3: and (4) adding calcium fluoride, styrene maleic anhydride copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring at the speed of 150r/min by using a stirrer to prepare the thermal insulation mortar.
Example 2
The thermal insulation mortar comprises the following raw materials in parts by weight: 96 parts of portland cement, 5 parts of fly ash, 12 parts of limestone powder, 15 parts of polystyrene particles, 9 parts of bentonite, 5 parts of a thickening agent, 4 parts of double flying powder, 6 parts of a tackifier, 2 parts of carboxyethyl methyl cellulose, 0.8 part of sodium dodecyl sulfate, 14 parts of calcium fluoride, 16 parts of an organic silicon-polyurethane copolymer, 22 parts of sodium carbonate and 7 parts of hydrochloric acid.
The thickening agent is cellulose ether;
the tackifier is ethylene-vinyl acetate copolymer latex powder;
the molar concentration of the hydrochloric acid is 2 mol/L;
the preparation method of the thermal insulation mortar comprises the following steps:
s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry;
s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 10min, and standing for 60 min;
s3: and (4) adding calcium fluoride, organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring at the speed of 80r/min by using a stirrer to prepare the thermal insulation mortar.
Example 3
The thermal insulation mortar comprises the following raw materials in parts by weight: 120 parts of portland cement, 10 parts of fly ash, 6 parts of limestone powder, 10 parts of polystyrene particles, 12 parts of bentonite, 3 parts of a thickening agent, 7 parts of calcium peroxide, 4 parts of a tackifier, 4 parts of carboxyethyl methyl cellulose, 1.5 parts of sodium dodecyl sulfate, 12 parts of calcium fluoride, 10 parts of a styrene maleic anhydride copolymer or an organic silicon-polyurethane copolymer, 28 parts of sodium carbonate and 8 parts of hydrochloric acid.
The thickening agent is cellulose ether;
the tackifier is ethylene-vinyl acetate copolymer latex powder;
the molar concentration of the hydrochloric acid is 4 mol/L;
the preparation method of the thermal insulation mortar comprises the following steps:
s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry;
s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 15min, and standing for 30 min;
s3: and (4) adding calcium fluoride, styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring at the speed of 200r/min by using a stirrer to prepare the thermal insulation mortar.
Comparative example 1
The preparation process was substantially the same as that of example 1 except that calcium fluoride, styrene maleic anhydride copolymer, sodium carbonate and hydrochloric acid were absent from the components.
Comparative example 2
The procedure was essentially the same as in example 1 except that calcium fluoride was absent from the composition.
Comparative example 3
The procedure was essentially the same as in example 1 except that the styrene maleic anhydride copolymer was absent from the composition.
Comparative example 4
The procedure was essentially the same as in example 1 except that the composition lacked sodium carbonate.
Comparative example 5
The procedure was essentially the same as in example 1 except that the composition lacked hydrochloric acid.
Comparative example 6
The thermal mortar was prepared by the process of example 1-3 of the Chinese invention patent "polystyrene foam particle thermal mortar (patent No. ZL 200610025027.1)".
The thermal mortar was prepared according to the preparation processes described in examples 1-3 and comparative examples 1-6, and the basic properties of each group of mortar were examined as shown in the following table:
from the above table, it can be seen that: (1) as can be seen from the data of examples 1-3 and comparative example 6, the thermal insulation mortar prepared according to examples 1-3 has significantly improved compressive strength and significantly reduced thermal conductivity, dry apparent density and shrinkage; meanwhile, as can be seen from the data of examples 1 to 3, example 1 is the most preferred example.
(2) As can be seen from the data of example 1 and comparative examples 1 to 5, calcium fluoride, styrene maleic anhydride copolymer or organosilicon-polyurethane copolymer, sodium carbonate and hydrochloric acid play a synergistic role in preparing the thermal insulation mortar, the compressive strength of the thermal insulation mortar is synergistically improved, and the thermal conductivity, dry apparent density and shrinkage are reduced, which are as follows: 1) the calcium fluoride can promote the foaming effect of the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer and the sodium carbonate in the thermal insulation mortar, a large number of micro bubbles are introduced into the mortar, and the independent, closed and fine bubbles can stably exist and be uniformly distributed in the thermal insulation mortar, so that the heat conductivity coefficient, the dry apparent density and the shrinkage rate of the thermal insulation mortar can be obviously reduced, the thermal insulation performance of the thermal insulation mortar is improved, and the workability of the thermal insulation mortar is enhanced. In addition, a large amount of fine bubbles introduced into the thermal insulation mortar play roles of lubrication and buffering, so that the inorganic lightweight aggregate is prevented from being directly contacted with the inner wall and the blades of the stirrer in the stirring process, the damage rate of the inorganic lightweight aggregate in the mortar stirring process is reduced, the discharge rate is improved, materials are saved, the closed pore porosity of the thermal insulation mortar is improved, and the dry apparent density, the heat conductivity coefficient and the volume water absorption of the thermal insulation mortar are reduced. 2) The foaming technology is utilized to prepare the foam type thermal insulation mortar, so that the thermal conductivity coefficient of the thermal insulation mortar can be effectively reduced, and the thermal insulation performance of the thermal insulation mortar is improved. In addition, the sodium carbonate has the function of quick setting, can shorten the time for curing and drying the heat-insulating layer, enables the heat-insulating mortar to be condensed in a short time, reduces the dry apparent density and improves the construction performance. 3) The styrene maleic anhydride copolymer, the calcium fluoride and the sodium carbonate can form a net structure which is distributed disorderly in the thermal insulation mortar, so that crystal lattices are activated, solid phase reaction is accelerated, microcracks formed in the concrete at the early hardening stage are blocked in the development process and are difficult to develop further, and the crack resistance and the compressive strength of the thermal insulation mortar are improved.
The invention takes calcium fluoride, styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid as a reinforcing system, and the weight ratio of the calcium fluoride to the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer to the sodium carbonate to the hydrochloric acid is controlled to be (12-14): (10-16): (22-28): (4-7), sodium carbonate is used as a main raw material of the reinforcing system in the reinforcing system, the foaming is promoted by the sodium carbonate and hydrochloric acid, a large amount of foam is generated in the mortar, and the dry apparent density, the heat conductivity coefficient and the volume water absorption rate of the heat-insulating mortar are reduced; by utilizing the characteristic that styrene maleic anhydride copolymer or organosilicon-polyurethane copolymer, calcium fluoride and sodium carbonate can form a disorderly distributed net structure in the thermal insulation mortar, the crack resistance and the compressive strength of the thermal insulation mortar are improved, so that when a reinforcing system is applied to the thermal insulation mortar, the crack resistance and the compressive strength of the thermal insulation mortar can be effectively improved, and the dry apparent density, the thermal conductivity coefficient and the volume water absorption rate are reduced.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (8)
1. The preparation method of the high-strength thermal insulation mortar is characterized by comprising the following steps:
s1: mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, double-flying powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to prepare slurry;
s2: adding sodium dodecyl sulfate into the slurry while stirring, stirring for 10-15min, and standing for 30-60 min;
s3: and (4) adding calcium fluoride, styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and uniformly stirring by using a stirrer to prepare the high-strength thermal insulation mortar.
2. The method for preparing high-strength thermal mortar according to claim 1, wherein the stirring speed of the stirrer in step S3 is 80-200 r/min.
3. The preparation method of the high-strength thermal insulation mortar according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 96-120 parts of portland cement, 5-10 parts of fly ash, 6-12 parts of limestone powder, 10-15 parts of polystyrene particles, 9-12 parts of bentonite, 3-5 parts of a thickening agent, 4-7 parts of double flying powder, 4-6 parts of a tackifier, 2-4 parts of carboxyethyl methyl cellulose, 0.8-1.5 parts of sodium dodecyl sulfate, 12-14 parts of calcium fluoride, 10-16 parts of a styrene maleic anhydride copolymer or an organic silicon-polyurethane copolymer, 22-28 parts of sodium carbonate and 4-7 parts of hydrochloric acid; the weight ratio of the calcium fluoride, the styrene maleic anhydride copolymer or the organic silicon-polyurethane copolymer, the sodium carbonate and the hydrochloric acid is (12-14): (10-16): (22-28): (4-7).
4. The preparation method of the high-strength thermal mortar according to claim 1, wherein the weight ratio of the calcium fluoride to the styrene-maleic anhydride copolymer or the organosilicon-polyurethane copolymer to the sodium carbonate to the hydrochloric acid is 13:15:26: 6.
5. The high-strength thermal insulation mortar of claim 1, which is characterized by comprising the following raw materials in parts by weight: 112 parts of portland cement, 8 parts of fly ash, 10 parts of limestone powder, 14 parts of polystyrene particles, 10 parts of bentonite, 4 parts of a thickening agent, 6 parts of calcium peroxide, 5 parts of a tackifier, 3 parts of carboxyethyl methyl cellulose, 1.2 parts of sodium dodecyl sulfate, 13 parts of calcium fluoride, 15 parts of styrene maleic anhydride copolymer or organic silicon-polyurethane copolymer, 26 parts of sodium carbonate and 6 parts of hydrochloric acid.
6. The method for preparing high-strength thermal mortar according to claim 1, wherein the thickener is cellulose ether.
7. The preparation method of the high-strength thermal mortar according to claim 1, wherein the tackifier is ethylene-vinyl acetate copolymer latex powder.
8. The method for preparing high-strength thermal mortar according to claim 1, wherein the hydrochloric acid has a molar concentration of 2-4 mol/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010549959.6A CN111662055A (en) | 2017-12-28 | 2017-12-28 | Preparation method of high-strength thermal insulation mortar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450097.6A CN108069660B (en) | 2017-12-28 | 2017-12-28 | Thermal insulation mortar and preparation method thereof |
| CN202010549959.6A CN111662055A (en) | 2017-12-28 | 2017-12-28 | Preparation method of high-strength thermal insulation mortar |
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| CN1061063C (en) * | 1993-08-10 | 2001-01-24 | 松下电器产业株式会社 | Thermal insulator and method for producing the same |
| CN100522867C (en) * | 2006-03-23 | 2009-08-05 | 同济大学 | Polystyrene foam particle heat-insulating mortar |
| ITMI20071003A1 (en) * | 2007-05-18 | 2008-11-19 | Polimeri Europa Spa | COMPOSITE BASED ON VINYLAROMATIC POLYMERS WITH IMPROVED PROPERTIES OF THERMAL INSULATION AND PROCEDURE FOR THEIR PREPARATION |
| JP2016501925A (en) * | 2012-10-29 | 2016-01-21 | スリーエム イノベイティブ プロパティズ カンパニー | Polydiorganosiloxane polyurethane |
| KR101726589B1 (en) * | 2014-04-18 | 2017-04-14 | 화인미셀공업(주) | Expanded mortar and method for fabricating thereof |
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| CN108069660A (en) | 2018-05-25 |
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Application publication date: 20200915 |