CN113563030A - Concrete for external wall insulation - Google Patents
Concrete for external wall insulation Download PDFInfo
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- CN113563030A CN113563030A CN202110946890.5A CN202110946890A CN113563030A CN 113563030 A CN113563030 A CN 113563030A CN 202110946890 A CN202110946890 A CN 202110946890A CN 113563030 A CN113563030 A CN 113563030A
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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
-
- 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
- C04B24/08—Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
-
- 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
- C04B24/16—Sulfur-containing compounds
- C04B24/18—Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
-
- 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
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
-
- 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
-
- 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
Abstract
The invention discloses concrete for external wall insulation, and relates to the technical field of building materials. The concrete comprises the following raw materials in parts by weight: cement: 120-180 parts of water: 80-100 parts of a heat insulation improver: 30-40 parts of glass fiber: 10-20 parts of polycarboxylic acid water reducing agent: 2-5 parts of dispersant: 1-3 parts; the preparation method comprises the following steps: (1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use; (2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould; (3) and (3) curing the concrete in the mould in the step (2). The heat insulation modifier is introduced, so that the remarkable heat insulation effect can be brought, and the compressive strength and the tensile strength of the concrete are improved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to concrete for external wall heat insulation.
Background
In recent years, the proportion of energy consumption in the building industry to the total social energy consumption is getting larger and larger, and building energy conservation and green buildings become research hotspots. According to statistics, at least more than 30% of energy of heating in winter and refrigerating in summer is dissipated through doors, windows and walls every year, so that the building envelope structure is required to have heat preservation and heat insulation performance. At present, the research direction is mainly to improve the heat preservation performance of a self-heat preservation concrete system formed by adding an additive or a light aggregate with the heat preservation performance into common concrete.
Prior art, application No.: CN201310734366.7, publication No.: CN103708786B discloses a heat preservation concrete and a manufacturing method thereof, and the technical scheme is as follows:
"a heat preservation concrete, comprising the following components by weight: 102 parts of fly ash, 205 parts of cement, 55 parts of foamed plastic, 25 parts of foamed glass, 40 parts of expanded mineral powder, 15 parts of sulfate, 85 parts of fine sand, 12 parts of silica powder, 7 parts of talcum powder, 10 parts of water reducing agent and 22 parts of foaming agent, wherein the water-gel ratio is kept at 0.52, the expanded mineral powder comprises expanded slag or pumice, the water reducing agent is polyhydroxy acid, the foaming agent is alkyl sulfate, and the density of the thermal insulation concrete is 900 kg/cubic meter.
The manufacturing method comprises the following steps:
(1) mixing, weighing (or measuring) fly ash, cement, foamed plastic, foamed glass, expanded mineral powder, silicate, sulfate, fine sand, silica powder, talcum powder, water reducing agent and foaming agent according to the weight ratio, and uniformly mixing the fly ash, the cement, the silicate, the sulfate, the fine sand, the silica powder and the talcum powder to obtain mixed powder,
(2) fully soaking the weighed foam plastic, foam glass, expanded mineral powder, water reducing agent and foaming agent in water for 18-24 hours, fully stirring once every 5-10 hours in the soaking process, replenishing water once every 5-6 hours along with the reduction of the soaking amount to ensure that the soaking amount submerges the components properly, recording the total water consumption in the soaking process,
(3) and (3) fishing out the soaking component in the step (2), wherein the soaking component is a mixture of foamed plastic, foamed glass, expanded mineral powder, a water reducing agent and a foaming agent after soaking, fully stirring and mixing the mixed powder in the step (1) and the soaked mixture in the step (2), and gradually increasing the water quantity until the water-cement ratio is kept at 0.5-0.6, so that the manufacturing process of the heat-preservation concrete is completed.
However, the above patents have the following problems: in practical use, as the foaming agent is added, more bubbles are easy to appear, and the bubbles are gathered under the action of the expanded mineral powder, so that the uniformity inside the concrete is influenced.
Disclosure of Invention
The invention aims to provide concrete for external wall insulation, wherein a heat insulation improver is introduced to bring remarkable heat insulation effect and improve the compressive strength and tensile strength of the concrete.
In order to achieve the purpose, the invention provides concrete for external wall insulation, which comprises the following raw materials in parts by weight:
cement: 120 to 180 portions of the mixture of the components,
water: 80 to 100 portions of the raw materials of the composition,
thermal insulation improver: 30 to 40 portions of the raw materials are mixed,
glass fiber: 10 to 20 portions of the raw materials are mixed,
polycarboxylic acid water reducing agent: 2 to 5 portions of the raw materials are mixed,
dispersing agent: 1 to 3 parts.
The concrete for external wall insulation comprises the following raw materials in parts by weight:
cement: 140 parts to 170 parts of the raw materials,
water: 90 to 100 portions of the weight percentage of the mixture,
thermal insulation improver: 30 to 40 portions of the raw materials are mixed,
glass fiber: 10 to 20 portions of the raw materials are mixed,
polycarboxylic acid water reducing agent: 2 to 5 portions of the raw materials are mixed,
dispersing agent: 1 to 3 parts.
The concrete for external wall insulation comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 40-60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
The concrete for external wall insulation provided by the technical scheme has the following beneficial effects:
compared with the prior art, the concrete for external wall insulation prepared by the invention has excellent overall performance, and better mechanical property and thermal insulation property. Particularly, a heat preservation modifier, polyethylene glycol, dioctyl ester and calcium lignosulfonate powder are introduced to realize synergistic interaction, so that the internal structure of the concrete is improved, and the internal heat insulation effect is improved.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 120 parts of (a) to (b),
water: 100 parts of (a) a water-soluble polymer,
thermal insulation improver: 30 parts of (a) to (b),
glass fiber: 20 parts of (by weight), and mixing the components,
polycarboxylic acid water reducing agent: 2 parts of (a) to (b),
dispersing agent: and 3 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 40%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Example 2
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 180 parts of (A) and (B) of,
water: 80 parts of (a) a water-soluble polymer,
thermal insulation improver: 40 parts of (a) to (b),
glass fiber: 10 parts of (a) to (b),
polycarboxylic acid water reducing agent: 5 parts of (a) a mixture of (b),
dispersing agent: 1 part.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Example 3
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 140 parts of (by weight) of a carrier liquid,
water: 100 parts of (a) a water-soluble polymer,
thermal insulation improver: 30 parts of (a) to (b),
glass fiber: 20 parts of (by weight), and mixing the components,
polycarboxylic acid water reducing agent: 2 parts of (a) to (b),
dispersing agent: and 3 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 50%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Example 4
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 170 parts of (a) to (b),
water: 90 parts of (a) a mixture of (b),
thermal insulation improver: 40 parts of (a) to (b),
glass fiber: 10 parts of (a) to (b),
polycarboxylic acid water reducing agent: 5 parts of (a) a mixture of (b),
dispersing agent: 1 part.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 40%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Example 5
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 1
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 1: 1: 1.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 2
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises dioctyl ester and calcium lignosulfonate powder, and the mass ratio of the dioctyl ester to the calcium lignosulfonate powder is 7: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 3
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol and calcium lignosulfonate powder, and the mass ratio of the polyethylene glycol to the calcium lignosulfonate powder is 5: 2.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 4
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the insulation improver comprises polyethylene glycol and dioctyl ester, and the mass ratio of the polyethylene glycol to the dioctyl ester is 5: 7.
in the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 5
The concrete for external wall insulation of the embodiment comprises the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
In the concrete for external wall insulation, the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
In the concrete for external wall insulation, the polycarboxylic acid water reducer is 412, and is purchased from Shenyang Xingzheng and chemical industry Co.Ltd;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
In the concrete for external wall insulation, the preparation method of the concrete for external wall insulation comprises the following steps:
(1) preparing cement, water, glass fiber, a polycarboxylic acid water reducing agent and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
In the concrete for external wall insulation, the temperature of the warehouse in the step (1) is 20 ℃, and the air humidity range is 60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
In the concrete for external wall insulation, the concrete poured into the mould in the step (2) is subjected to standing treatment, wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 hours.
In the concrete for external wall insulation, the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
Comparative example 6
In the prior art, publication number CN111018432A discloses a cement-resin lightweight waterproof heat-insulating concrete and a preparation method thereof, and the specification thereof discloses the following scheme:
the invention provides a technical scheme that: the cement-resin lightweight waterproof heat-insulating concrete comprises, by weight, cement (800 kg/m)3) Mineral powder (300 kg/m)3) Slag (500 kg/m)3) Thickener (0.5 kg/m)3) Polyphenyl granules (10 kg/m)3) Resin (100 kg/m)3) Water reducing agent (10 kg/m)3) Water (180 kg/m)3)；
The manufacturing process of the cement-resin lightweight waterproof heat-preservation concrete comprises the following specific steps:
firstly, raw materials of cement, slag, mineral powder, a thickening agent and polyphenyl granules of the cement-resin light waterproof heat preservation concrete are sequentially added into a stirrer according to the proportion of a raw material formula for stirring, after the raw materials are stirred for 1 to 3 minutes, water, resin and a water reducing agent are added for stirring, and after the raw materials are stirred for 5 to 10 minutes, the cement-resin light waterproof heat preservation concrete is obtained;
and (II) discharging the cement-resin lightweight waterproof heat-preservation concrete out of the stirrer and into a stirring tank car, wherein the tank body of the stirring tank car synchronously works in the transportation process, the rotating speed of the tank body is more than 2 revolutions per minute, and the transportation and waiting unloading time of the stirring tank car is less than 2 hours.
The cement-resin lightweight waterproof heat-preservation concrete in the stirring tank car is unloaded, pouring is carried out through pouring equipment, and slight vibration guide is carried out on the cement-resin lightweight waterproof heat-preservation concrete in the pouring process, so that the internal structure of the cement-resin lightweight waterproof heat-preservation concrete is more compact.
After the cement-resin light waterproof heat preservation concrete is poured, the outer surface of the cement-resin light waterproof heat preservation concrete is smoothed by using a mold, and a film is covered for maintenance.
And removing the film after the cement-resin lightweight waterproof heat-preservation concrete is maintained, and brushing a concrete surface protective agent on the outer surface of the cement-resin lightweight waterproof heat-preservation concrete.
The cement is ordinary portland cement, and the hardness of the cement after hardening and forming is more than 42.5 MPa.
The slag is industrial waste slag, and the fineness of the slag is more than 1mm and less than 10 mm.
The thickening agent is polyacrylamide or hydroxymethyl cellulose ether, and the density of polyphenyl granules is 15kg/m3。
The water reducing agent is polycarboxylic acid high-efficiency water reducing agent for concrete, and the water reducing rate of the water reducing agent is 25%.
The resin is a mixture of aqueous epoxy resin emulsion and a curing agent ".
Comparative example 7
In the prior art, publication number CN107963858A discloses a novel heat-insulating concrete and a preparation method thereof, and the specification thereof discloses the following scheme:
the preparation method of the novel heat-insulating concrete of the embodiment comprises the following steps:
under the room temperature environment, 4200mL of distilled water and 154g of Arabic gum are fully mixed, 770g of n-octadecane and 168g of hexamethylene diisocyanate are added under the stirring condition of 500r/min, and the mixture is reacted for 15min at 50 ℃; then adding 14g of 1% polyethyleneimine aqueous solution, and reacting for 2.5h at 50 ℃; mixing trimethoxymethyl and water 1: 2, mixing and adjusting the pH value to 3, and stirring for 1h at 1000r/min to obtain a trimethoxy methyl aqueous solution with the pH value of 3; adding 840mL of trimethoxymethyl aqueous solution with the pH value of 3, reacting for 24h at room temperature, and drying in vacuum to obtain the nano silicon dioxide film coated phase change material;
and stirring 1000g of Portland cement with the strength mark of 525 and the P.I type, 2000g of stones with the particle size of 28mm and 1500g of nano silicon dioxide film-wrapped phase change materials uniformly, adding 350g of distilled water, fully and uniformly mixing, placing in a mold, forming the mold, demolding, and drying and curing at the temperature of 23 ℃ for 72 hours to obtain the novel heat-insulating concrete.
Comparative example 8
In the prior art, publication number CN108218319B discloses a steel fiber polystyrene particle regenerated thermal insulation concrete and a preparation method thereof, and the specification thereof discloses the following scheme:
"the steel fiber polystyrene particle recycled thermal insulation concrete of this embodiment has a design strength of C30, and is prepared from the following raw materials in percentage by weight: 7% of water, 13.5% of cement, 30% of river sand, 45.15% of recycled coarse aggregate, 1.5% of resin powder, 2% of steel fiber, 0.15% of water reducing agent and 0.7% of polystyrene particles. Wherein the water is tap water; the strength grade of the cement is 42.5; the river sand is natural river sand with apparent density of 2590kg/m3Water absorption of 0.5 percent and fineness modulus of 2.67; the recycled coarse aggregate is crushed blocks with the particle size of 5mm-20mm obtained by crushing and sieving waste concrete with the strength of 30 MPa; the resin glue powder is a mixture of polyvinyl alcohol and vinyl acetate-ethylene carbonate copolymer, the particle size is 400 mu m, and the bulk density is 520kg/m3The solid content is 99 percent, and the film forming temperature is 1 ℃; the length of the steel fiber is 50mm, the diameter of the steel fiber is 0.4mm, and the tensile strength of the steel fiber is 700 MPa; the water reducing agent is a polycarboxylate high-efficiency water reducing agent with the molecular weight of 20000-plus 30000; the polystyrene particles are particles with the particle size of 0.1mm-2mm, which are obtained by crushing and sieving waste polystyrene foam boards, the air content in the polystyrene particles is 98% -99%, the particle size is 0.1mm-2mm, and the volume weight is 20kg/m3The thermal conductivity was 0.006 w/m.K.
The preparation method of the steel fiber polystyrene particle regenerated thermal insulation concrete comprises the following steps:
step 1: taking waste concrete with the strength of 50MPa, crushing and sieving to obtain fragments with the particle size of 5-20 mm, namely the recycled coarse aggregate;
step 2: taking waste polystyrene foam boards, crushing and sieving to obtain particles with the particle size of 0.1-2mm, namely polystyrene particles;
and step 3: the composite material is prepared from the following raw materials in percentage by weight: 7% of water, 13.5% of cement, 30% of river sand, 45.15% of recycled coarse aggregate, 1.5% of resin powder, 2% of steel fiber, 0.15% of water reducing agent and 0.7% of polystyrene particles;
and 4, step 4: mixing cement, steel fiber, recycled coarse aggregate and river sand, and stirring for 1 minute to obtain a mixture;
and 5: weighing the polystyrene particles in the weight ratio in the step 3 to obtain the weight of the polystyrene particles before water absorption; soaking the polystyrene particles with the weight ratio in the step 3 in water for at least 0.5h to obtain water-absorbed polystyrene particles, and weighing to obtain the weight of the water-absorbed polystyrene particles; subtracting the weight of the polystyrene particles before water absorption from the weight of the polystyrene particles after water absorption to obtain the water absorption capacity of the polystyrene particles; subtracting the water absorption capacity of the polystyrene particles from the weight of the water in the weight ratio in the step 2 to obtain the residual water;
step 6: and (3) adding resin powder into the water-absorbed polystyrene particles obtained in the step (5), then adding the water-absorbed polystyrene particles into the mixture obtained in the step (4), uniformly stirring, adding the residual water amount and the water reducing agent calculated in the step (5), and stirring for 3 minutes to obtain the steel fiber polystyrene particle regeneration heat-preservation concrete'.
Test protocol
The technical schemes of examples 1-5 and comparative examples 1-8 were selected and tested with reference to the following references:
(1) application No.: CN201810079042.7, publication No.: CN108218319B, discloses a steel fiber polystyrene particle regenerated thermal insulation concrete and a preparation method thereof;
(2) li Shijie, Xue Wei, LIzhijie, etc. fire resistance test research on inorganic heat-insulating sandwich external wall of precast concrete [ J ]. proceedings of building construction 2015,36(1): 59-67%;
(3) study on compression and fracture resistance tests of the recycled heat-preservation concrete [ J ] concrete, 2013, (12):38-40,45.
TABLE 1 test results
As shown in Table 1, the concrete prepared in examples 1 to 5 in the present application has various test parameters superior to those of the prior art, as compared with comparative examples 1 to 8; specifically, the prepared concrete has the compression strength ranging from 22.7MPa to 23.9MPa, the tensile strength ranging from 3.6MPa to 4.8MPa and the thermal conductivity ranging from 0.08W/mK to 0.12W/mK. The application sets contrast in comparative examples 1-5, which brings significant difference in effect for comparing important components in the application; for example, in comparative example 1, the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is adjusted to 1: 1: 1, but it can be seen that the performance of each parameter is reduced, wherein the compressive strength is only 20.5MPa, wherein the tensile strength is only 3.1MPa, wherein the thermal conductivity is only 0.18W/m · K, it can be seen that the three substances act synergistically, and furthermore, we have devised other proportional relationships, for example a proportional relationship adjusted to 5: 7: 7. 5: 2: 2. 7: 7: 2. 2: 5: 7, etc., but these effects were still very poor, substantially close to those of comparative example 1, as tested; in comparative example 2, comparative example 3 and comparative example 4, polyethylene glycol, dioctyl ester and calcium lignosulfonate powder are respectively removed, performance parameters of compressive strength, tensile strength and heat conductivity coefficient are reduced, and the three substances participate in the effects of enhancing the mechanical property, the heat preservation property and the like of concrete; in comparative example 5, the whole thermal insulation modifier is removed, and it can be seen that each parameter reaches the lowest performance value. In conclusion, the heat preservation modifier is creatively introduced, and three substances in the heat preservation modifier are synergistic, so that the internal network structure of the concrete can be improved, the heat insulation capability in the concrete is improved, and a heat bridge is isolated.
In addition, in comparative examples 6 to 8, the overall effects are inferior to the data of examples 1 to 5 of the present application, and the reason is presumed as follows: (1) the mixed use of the polyphenyl particles and the resin easily causes more condensed particles to be formed in the concrete, which is not beneficial to the storage of heat; (2) hexamethylene diisocyanate is relatively toxic and has a low reaction yield with an aqueous solution of polyethyleneimine.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The concrete for the external wall heat insulation is characterized by comprising the following raw materials in parts by weight:
cement: 120 to 180 portions of the mixture of the components,
water: 80 to 100 portions of the raw materials of the composition,
thermal insulation improver: 30 to 40 portions of the raw materials are mixed,
glass fiber: 10 to 20 portions of the raw materials are mixed,
polycarboxylic acid water reducing agent: 2 to 5 portions of the raw materials are mixed,
dispersing agent: 1 to 3 parts.
2. The concrete for exterior wall insulation according to claim 1, comprising the following raw materials in parts by weight:
cement: 140 parts to 170 parts of the raw materials,
water: 90 to 100 portions of the weight percentage of the mixture,
thermal insulation improver: 30 to 40 portions of the raw materials are mixed,
glass fiber: 10 to 20 portions of the raw materials are mixed,
polycarboxylic acid water reducing agent: 2 to 5 portions of the raw materials are mixed,
dispersing agent: 1 to 3 parts.
3. The concrete for exterior wall insulation according to claim 2, comprising the following raw materials in parts by weight:
cement: 160 parts of (a) to (b),
water: 95 parts of (a) a reaction product of (B),
thermal insulation improver: 35 parts of (a) a mixture of (b),
glass fiber: 15 parts of (a) to (b),
polycarboxylic acid water reducing agent: 4, preparing 4 parts of the mixture,
dispersing agent: and 2 parts.
4. The concrete for exterior wall insulation according to claim 3,
the heat insulation improver comprises polyethylene glycol, dioctyl ester and calcium lignosulfonate powder, wherein the mass ratio of the polyethylene glycol to the dioctyl ester to the calcium lignosulfonate powder is 5: 7: 2.
5. the concrete for exterior wall insulation according to claim 3,
the average length of the glass fiber is 5 mm;
the average diameter of the glass fiber is 0.2 mm.
6. The concrete for exterior wall insulation according to claim 3,
the polycarboxylic acid water reducing agent is 412, and is purchased from Shenyang Xingzheng and chemical engineering Limited company;
the dispersant is WHDF-S, which is purchased from Shandong seven-wood Tianyi New Material Co.
7. The concrete for exterior wall insulation according to claim 3,
the preparation method of the concrete for external wall heat insulation comprises the following steps:
(1) preparing cement, water, a thermal insulation improver, glass fiber, a polycarboxylic acid water reducer and a dispersing agent, and putting the materials into a warehouse for later use;
(2) transferring the raw materials in the step (1) into a stirrer to be stirred and mixed, and pouring the mixture into a mould;
(3) and (3) curing the concrete in the mould in the step (2).
8. The concrete for exterior wall insulation according to claim 7,
in the step (1), the temperature of the warehouse is 20 ℃, and the air humidity range is 40-60%;
the temperature for stirring and mixing in the step (2) is 50 ℃;
the stirring and mixing time in the step (2) is 8 hours.
9. The concrete for exterior wall insulation according to claim 8,
and (3) standing the concrete poured into the mould in the step (2), wherein the standing pressure is 6MPa, the standing temperature is 25 ℃, the standing humidity is 65%, and the standing time is 72 h.
10. The concrete for exterior wall insulation according to claim 9,
the operation mode of curing in the step (3) is as follows:
dismantling the mold, transferring the mold into a curing room of a construction site, controlling the temperature of the curing room to be 25 ℃ and controlling the humidity of the curing room to be 85%; the curing period was 28 days, wherein the spraying of water on the concrete surface was performed every 5 days.
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| US20100204365A1 (en) * | 2008-11-21 | 2010-08-12 | Tao Bernard Y | Soy methyl ester polystyrene blends for use in concrete |
| CN102040365A (en) * | 2010-11-03 | 2011-05-04 | 中国科学院青海盐湖研究所 | Light dolomite magnesium cement partition plate and manufacturing method thereof |
| CN102795818A (en) * | 2012-08-06 | 2012-11-28 | 万俊松 | Self-insulation wall material |
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