CN111533511A - High-strength heat-preservation autoclaved aerated building block - Google Patents
High-strength heat-preservation autoclaved aerated building block Download PDFInfo
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- CN111533511A CN111533511A CN202010381593.6A CN202010381593A CN111533511A CN 111533511 A CN111533511 A CN 111533511A CN 202010381593 A CN202010381593 A CN 202010381593A CN 111533511 A CN111533511 A CN 111533511A
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- autoclaved aerated
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
The invention relates to the technical field of building materials, and relates to a high-strength heat-preservation autoclaved aerated building block which is prepared from the following raw materials in parts by weight: 40-50 parts of water; 20-35 parts of cement; 2-4 parts of a water reducing agent; 0.1-0.3 part of foaming agent; 50-70 parts of fine aggregate; 3-7 parts of waste fibers; 3-8 parts of waste rubber; 1-2 parts of 2, 4, 6-trimethyl benzoyl diphenylphosphine. The invention has the advantages that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is improved by utilizing the waste, so that the application range of the high-strength heat-preservation autoclaved aerated building block is wider, and meanwhile, the effects of better energy conservation and environmental protection and reduction of the influence of the waste on the environment are facilitated.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-strength heat-preservation autoclaved aerated building block.
Background
At present, the autoclaved aerated concrete block is a porous concrete product which is prepared by taking fly ash, lime, cement, gypsum, slag and the like as main raw materials, adding a proper amount of a gas former, a regulator and a bubble stabilizer, and carrying out the processes of batching, stirring, pouring, standing, cutting, high-pressure steam curing and the like, and generally has better heat insulation performance.
Due to the special manufacturing process of the autoclaved aerated concrete blocks, the prepared autoclaved aerated concrete products are all of a porous structure, so that the compressive strength of the autoclaved aerated concrete blocks is easily influenced by the porous structure, the autoclaved aerated concrete blocks can only be applied to outer filler walls and non-bearing inner partition walls of buildings generally, the application range of the autoclaved aerated concrete blocks is limited, and accordingly, the autoclaved aerated concrete blocks still have an improved space.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-strength heat-preservation autoclaved aerated building block.
Aiming at the defects in the prior art, the invention also aims to provide a preparation method of the high-strength heat-preservation autoclaved aerated building block.
The above object of the present invention is achieved by the following technical solutions:
the high-strength heat-preservation autoclaved aerated building block is prepared from the following raw materials in parts by mass:
40-50 parts of water;
20-35 parts of cement;
2-4 parts of a water reducing agent;
0.1-0.3 part of foaming agent;
50-70 parts of fine aggregate;
3-7 parts of waste fibers;
3-8 parts of waste rubber;
1-2 parts of 2, 4, 6-trimethyl benzoyl diphenylphosphine.
By adopting the technical scheme, the waste fibers, the waste rubber and the 2, 4, 6-trimethylbenzoyl diphenylphenoxy phosphate are added to be matched with each other in a synergistic manner, so that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is favorably improved, the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less easily influenced by a porous structure, the high-strength heat-preservation autoclaved aerated building block can be used for construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated building block is favorably expanded.
The compressive strength of the high-strength heat-preservation autoclaved aerated building block is enhanced by adding the waste fibers and the waste rubber, the utilization rate of resources is favorably improved, the waste fibers and the waste rubber are enabled to be less prone to influencing the environment, and the green environmental-friendly performance of the high-strength heat-preservation autoclaved aerated building block is favorably improved.
The present invention in a preferred example may be further configured to: the fine aggregate comprises one or more of fly ash, lime, gypsum, slag, talcum powder, mica powder, zircon powder, micro-silica powder, vermiculite powder, fluorite powder, shell powder, zircon sand and eggshell powder.
By adopting the technical scheme, one or more of the substances are compounded to form fine aggregates, so that the accumulation density of the fine aggregates in the high-strength heat-preservation autoclaved aerated block is improved, the compressive strength of the high-strength heat-preservation autoclaved aerated block is improved better, the compressive strength of the high-strength heat-preservation autoclaved aerated block is not influenced by a porous structure, the high-strength heat-preservation autoclaved aerated block is suitable for building construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is expanded better.
The present invention in a preferred example may be further configured to: the fine aggregate comprises the following components in parts by mass:
20-30 parts of mica powder;
10-15 parts of shell powder;
20-25 parts of zircon sand.
The present invention in a preferred example may be further configured to: the fine aggregate comprises the following components in parts by mass:
27 parts of mica powder;
11 parts of shell powder;
22 parts of zircon sand.
By adopting the technical scheme, the mica powder, the shell powder and the zircon sand in a specific proportion are cooperatively matched, so that the aggregate accumulation density in the high-strength heat-preservation autoclaved aerated block is favorably improved, the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved, and the compressive strength of the high-strength heat-preservation autoclaved aerated block is less easily influenced by a porous structure; meanwhile, the water resistance of the high-strength heat-preservation autoclaved aerated block can be better improved, so that the high-strength heat-preservation autoclaved aerated block is more difficult to corrode by moisture in the environment in a humid environment, the compressive strength of the high-strength heat-preservation autoclaved aerated block is more difficult to be influenced by moisture in the humid environment, the high-strength heat-preservation autoclaved aerated block is further more suitable for building construction of a bearing wall and a long-term water immersion or frequent dry-wet alternate position, and the application range of the high-strength heat-preservation autoclaved aerated block can be better expanded.
The present invention in a preferred example may be further configured to: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
0.3-0.9 part of diethyl succinate.
By adopting the technical scheme, the diethyl succinate is added, so that the effect of the 2, 4, 6-trimethylbenzoyl diphenylphosphine can be better promoted, the 2, 4, 6-trimethylbenzoyl diphenylphosphine can be better cooperated with the waste fiber and the waste rubber, the compressive strength of the high-strength heat-preservation autoclaved aerated building block can be better improved, the high-strength heat-preservation autoclaved aerated building block is more suitable for construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated building block can be better expanded.
The present invention in a preferred example may be further configured to: the water reducing agent is a polycarboxylic acid water reducing agent.
By adopting the technical scheme, the polycarboxylate water reducer is adopted to be matched with other raw material components in a mutual cooperation manner as the water reducer, so that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is favorably improved to a certain extent, the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less susceptible to the influence of a porous structure, the high-strength heat-preservation autoclaved aerated building block is more suitable for building construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated building block is favorably expanded.
The present invention in a preferred example may be further configured to: the foaming agent is aluminum powder.
By adopting the technical scheme, the aluminum powder is used as the foaming agent, so that the improvement of the foaming uniformity inside the high-strength heat-preservation autoclaved aerated building block is facilitated, the uniformity of the porous structure of the high-strength heat-preservation autoclaved aerated building block is better, and the improvement of the compressive strength of the high-strength heat-preservation autoclaved aerated building block is facilitated to a certain extent; meanwhile, the aluminum powder is favorably accumulated with the fine aggregates in the high-strength heat-preservation autoclaved aerated block, so that the accumulation density of the fine aggregates in the high-strength heat-preservation autoclaved aerated block is higher, the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved, the high-strength heat-preservation autoclaved aerated block is more suitable for building construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is favorably expanded.
The present invention in a preferred example may be further configured to: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
1-2 parts of calcium tetrafluoroborate.
By adopting the technical scheme, the calcium tetrafluoroborate is added, so that the water resistance of the high-strength heat-preservation autoclaved aerated building block can be better improved, the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less susceptible to water immersion, the high-strength heat-preservation autoclaved aerated building block is more suitable for building construction in positions where water immersion is carried out for a long time or the water immersion is carried out frequently alternately, and the application range of the high-strength heat-preservation autoclaved aerated building block can be better expanded.
The present invention in a preferred example may be further configured to: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
0.1-0.3 part of gadolinium chloride.
By adopting the technical scheme, the gadolinium chloride is added, so that the effect of calcium tetrafluoroborate can be better promoted, and the water resistance of the high-strength heat-preservation autoclaved aerated building block can be better improved, so that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less susceptible to water soaking, the high-strength heat-preservation autoclaved aerated building block is more suitable for building construction in positions where water is soaked for a long time or the water and the humidity alternate frequently, and the application range of the high-strength heat-preservation autoclaved aerated building block can be better expanded.
The second aim of the invention is realized by the following technical scheme:
a preparation method of a high-strength heat-preservation autoclaved aerated building block comprises the following steps:
step (1), mixing cement, water, fine aggregate and a water reducing agent, and uniformly stirring to form a premix;
adding the rest raw material components of the high-strength heat-preservation autoclaved aerated block into the premix, and reacting for 4-6min to obtain a concrete mixture;
step (3), stirring for 5-10min, pouring the concrete mixture into a mold, and standing for 10-12 h;
step (4), cutting the concrete mixture formed by standing still into the size of the actual required specification to form a building block brick blank;
and (5) carrying out autoclaved curing and molding on the building block brick blank to obtain the high-strength heat-preservation autoclaved aerated building block.
By adopting the technical scheme, the raw material components of the high-strength heat-preservation autoclaved aerated block are favorably and cooperatively matched with each other better by controlling the adding sequence of the raw material components, so that the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved, and the compressive strength of the high-strength heat-preservation autoclaved aerated block is less easily influenced by a porous structure.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the waste fibers, the waste rubber and the 2, 4, 6-trimethylbenzoyl diphenylphenoxy phosphorus are added to be matched with each other in a synergistic manner, so that the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved, the high-strength heat-preservation autoclaved aerated block can be used for construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is favorably expanded;
2. the compressive strength of the high-strength heat-preservation autoclaved aerated block is enhanced by adding the waste fibers and the waste rubber, the utilization rate of resources is favorably improved, the waste fibers and the waste rubber are less prone to influencing the environment, and the green environmental-friendly performance of the high-strength heat-preservation autoclaved aerated block is favorably improved;
3. the mica powder, the shell powder and the zircon sand in a specific proportion are matched in a synergistic manner, so that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is favorably improved, and the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less susceptible to the influence of a porous structure;
4. by adopting the synergistic matching of the mica powder, the shell powder and the zircon sand in a specific proportion, the water resistance of the high-strength heat-preservation autoclaved aerated block can be better improved, so that the high-strength heat-preservation autoclaved aerated block is more suitable for building construction of a bearing wall and a position where water is soaked for a long time or the high-strength heat-preservation autoclaved aerated block is frequently alternated dry and wet, and the application range of the high-strength heat-preservation autoclaved aerated block can be better expanded.
Detailed Description
The present invention will be described in further detail below.
In the following examples, Portland cement having a model number of P.O 42.5.5 manufactured by Zhengzhou Kerui refractory Co., Ltd;
in the following examples, the naphthalene based superplasticizer was a 90-grade naphthalene based superplasticizer from Shandongxin company of Riyuan chemical Co., Ltd.
In the following examples, a polycarboxylate water reducing agent manufactured by Hangzhou Shibao building materials science and technology Co., Ltd, a polycarboxylate water reducing agent having a 4800 product number was used.
In the following examples, a magnesium oxysulfate foaming agent having a product number of 6138538 from jonan magnesium jia diagram new material development ltd is used.
In the following examples, aluminum powder having a product number of 008 of Jiangsu Tianyuan Metal powder Co., Ltd was used.
In the following examples, fly ash was second grade fly ash having a product number of 01 from hebei yuran building materials science and technology ltd.
In the following examples, the lime is 008 available from Guangzhou Dongg chemical technology Co., Ltd.
In the following examples, gypsum was prepared from powdered gypsum of Minnan comma qi chemical Co., Ltd, having a product number of 1003.
In the following examples, mica powder with a product number of 400 in the national treasury Auda mineral processing plant was used.
In the following examples, shell powder was prepared from shell powder of 03 from a processing plant for the mineral products of Lingshou prefecture.
In the following examples, the zircon sand used was 2750 from Dayunnan Shandong, Industrial engineering and engineering Co., Ltd.
In the following examples, waste fibers of type 008 from the Likehu plastic products factory in the south sea area of Fushan City were used.
In the following examples, waste rubber particles of Handan Hua Heng chemical Co., Ltd, having a product number of 001, were used.
In the following examples, 2, 4, 6-trimethylbenzoyldiphenylphosphine was 2, 4, 6-trimethylbenzoyldiphenylphosphine available from Shanghai George Biotech limited as A11096.
In the following examples, diethyl succinate available as 123-25-1JNS from Shanghai Dairy Fine Chemicals, Inc. was used.
In the following examples, calcium tetrafluoroborate was obtained from ALFA aesar (china) chemical limited under the trade designation ALFA-38109.
In the following examples, gadolinium chloride of the product number H270001 from Shanghai Boehne chemical technology Co., Ltd is used.
Example 1
A preparation method of a high-strength heat-preservation autoclaved aerated building block comprises the following steps:
and (1) adding cement into a stirring kettle, stirring at the rotating speed of 350r/min, adding water, fine aggregate and a water reducing agent while stirring, and uniformly stirring to form a premix.
And (2) adding a foaming agent, waste fibers, waste rubber and 2, 4, 6-trimethylbenzoyl diphenylphosphine into the premix while stirring, uniformly mixing, and standing for reacting for 4min to obtain the concrete mixture.
And (3) stirring at the rotating speed of 200r/min for 5min, pouring the concrete mixture into a mold, conveying the mold into a static curing room, standing for full foaming and static curing, controlling the static curing temperature to be 65 ℃, and controlling the static curing time to be 10 h.
And (4) disassembling the mould, demoulding the formed concrete mixture, and cutting the concrete mixture into the size of the actual required specification by adopting a cutting machine to form a building block brick blank.
And (5) putting the building block brick blank into an autoclave for autoclave curing and forming, controlling the autoclave curing temperature to be 165 ℃ and the autoclave curing time to be 10 hours, and obtaining the high-strength heat-preservation autoclaved aerated building block.
In this example, the fine aggregate is fly ash; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the foaming agent is a magnesium oxysulfate foaming agent.
The raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 1, and the content unit of each component in table 1 is kg.
Example 2
The difference from example 1 is that:
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in the table 1;
controlling the reaction time to be 5min in the step (2);
in the step (3), the stirring time is controlled to be 7min, and the standing and maintaining time is controlled to be 11 h.
Example 3
The difference from example 1 is that:
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in the table 1;
controlling the reaction time to be 6min in the step (2);
in the step (3), the stirring time is controlled to be 10min, and the standing and maintaining time is controlled to be 12 h.
Example 4
The difference from example 1 is that:
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in the table 1;
controlling the reaction time to be 5.5min in the step (2);
in the step (3), the stirring time is controlled to be 9min, and the standing and maintaining time is controlled to be 11.5 h.
TABLE 1
Examples 5 to 17
The difference from example 4 is that: the composition and content of the fine aggregate are shown in table 2, and the unit of the content of each component in table 2 is kg.
TABLE 2
Examples 18 to 21
The difference from example 4 is that:
diethyl succinate is also added in the step (2);
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 3, and the content unit of each component in table 3 is kg.
TABLE 3
Example 22
The difference from example 4 is that: the water reducing agent is a polycarboxylic acid water reducing agent.
Example 23
The difference from example 4 is that: the foaming agent is aluminum powder.
Examples 24 to 27
The difference from example 4 is that:
calcium tetrafluoroborate is also added in the step (2);
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 4, and the content unit of each component in table 4 is kg.
TABLE 4
Examples 28 to 31
The difference from example 4 is that:
gadolinium chloride is also added in the step (2);
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 5, and the content unit of each component in table 5 is kg.
TABLE 5
Examples 32 to 35
The difference from example 4 is that:
calcium tetrafluoroborate and gadolinium chloride are also added in the step (2);
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 6, and the content unit of each component in table 6 is kg.
TABLE 6
Examples 36 to 39
The difference from example 4 is that:
in the above embodiment, the fine aggregate is a mixture of mica powder, shell powder and zircon sand; the water reducing agent is a polycarboxylic acid water reducing agent; the foaming agent is aluminum powder.
Diethyl succinate, calcium tetrafluoroborate and gadolinium chloride are also added in the step (2);
the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in table 7, and the content unit of each component in table 7 is kg.
TABLE 7
Comparative examples 1 to 4
The difference from example 4 is that: the raw material components and the content of the high-strength heat-preservation autoclaved aerated concrete block are shown in the table 8, and the content unit of each component in the table 8 is kg.
TABLE 8
Experiment 1
The compressive strength (MPa) of the high-strength heat-preservation autoclaved aerated block prepared in the embodiment and the comparative example is detected according to GB/T4111-2013 'concrete block and brick test method', then the high-strength heat-preservation autoclaved aerated block prepared in the embodiment and the comparative example is placed in water at 25 ℃ for soaking for 15 days, and the compressive strength (MPa) of the high-strength heat-preservation autoclaved aerated block is detected again. And calculating the change rate (%) of the compressive strength of the high-strength heat-preservation autoclaved aerated block before and after soaking in water, wherein the calculation mode of the change rate is as follows: the percent change (compression strength before the high-strength heat-preservation autoclaved aerated block is put into water-compression strength after the high-strength heat-preservation autoclaved aerated block is put into water)/the compression strength before the high-strength heat-preservation autoclaved aerated block is put into water is multiplied by 100%.
The data from the above experiments are shown in Table 9.
TABLE 9
According to the data comparison of the embodiments 4 to 17 in the table 9, the mica powder, the shell powder and the zircon sand in a specific proportion are cooperatively matched with each other, so that the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved, the compressive strength of the high-strength heat-preservation autoclaved aerated block is less easily influenced by a porous structure, the high-strength heat-preservation autoclaved aerated block can be simultaneously suitable for construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is favorably expanded; meanwhile, only by adopting the synergistic cooperation of the mica powder, the shell powder and the zircon sand in a specific proportion, the water resistance of the high-strength heat-preservation autoclaved aerated block can be better improved, and the compressive strength of the high-strength heat-preservation autoclaved aerated block is more difficult to be influenced by a humid environment, so that the high-strength heat-preservation autoclaved aerated block is simultaneously suitable for building construction of positions which are soaked in water for a long time or are frequently alternate in dry and wet, the application range of the high-strength heat-preservation autoclaved aerated block can be better expanded, any component is lacked or any proportion is changed, and the effect of improving the water resistance of the high-strength heat-preservation autoclaved aerated block cannot be achieved.
According to the comparison of the data of the embodiment 4 and the embodiments 18 to 21 in the table 9, the addition of diethyl succinate is favorable for better promoting the effect of 2, 4, 6-trimethylbenzoyl diphenoxy phosphate, so that the compressive strength of the high-strength heat-preservation autoclaved aerated block is better improved, the compressive strength of the high-strength heat-preservation autoclaved aerated block is less susceptible to the influence of a porous structure, the high-strength heat-preservation autoclaved aerated block is more suitable for the construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is better expanded.
According to comparison of data of the embodiment 4 and the embodiments 22 to 23 in the table 9, the polycarboxylic acid water reducing agent is adopted as the water reducing agent or the aluminum powder is adopted as the foaming agent, so that the compressive strength of the high-strength heat-preservation autoclaved aerated block is favorably improved to a certain extent, the compressive strength of the high-strength heat-preservation autoclaved aerated block is less easily influenced by a porous structure, the high-strength heat-preservation autoclaved aerated block is more suitable for construction of a bearing wall, and the application range of the high-strength heat-preservation autoclaved aerated block is favorably expanded.
According to comparison of data of the embodiment 4 and the embodiments 24 to 35 in the table 9, the calcium tetrafluoroborate is added independently, so that the water resistance of the high-strength heat-preservation autoclaved aerated concrete block is improved better, and the compression strength of the high-strength heat-preservation autoclaved aerated concrete block is not affected by a humid environment easily; the gadolinium chloride is added independently, so that the water resistance of the high-strength heat-preservation autoclaved aerated building block is hardly affected, and only when the gadolinium chloride and the calcium tetrafluoroborate are cooperatively matched, the water resistance of the high-strength heat-preservation autoclaved aerated building block can be better improved, so that the compressive strength of the high-strength heat-preservation autoclaved aerated building block is less susceptible to the influence of a humid environment, the high-strength heat-preservation autoclaved aerated building block is more suitable for building construction in positions where water is soaked for a long time or the positions are frequently alternated dry and wet, and the application range of the high-strength heat-preservation autoclaved aerated building block is favorably expanded.
According to the comparison of the data of the example 4 and the comparative examples 1 to 4 in the table 9, the compressive strength of the high-strength heat-preservation autoclaved aerated block can be better improved only when the waste fiber, the waste rubber and the 2, 4, 6-trimethylbenzoyl diphenoxy phosphate are synergistically matched, and the compressive strength of the high-strength heat-preservation autoclaved aerated block is easily influenced due to the lack of any component.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A high-strength heat-preservation autoclaved aerated building block is characterized in that: the high-strength heat-preservation autoclaved aerated concrete block is prepared from the following raw materials in parts by weight:
40-50 parts of water;
20-35 parts of cement;
2-4 parts of a water reducing agent;
0.1-0.3 part of foaming agent;
50-70 parts of fine aggregate;
3-7 parts of waste fibers;
3-8 parts of waste rubber;
1-2 parts of 2, 4, 6-trimethyl benzoyl diphenylphosphine.
2. The high-strength heat-preservation autoclaved aerated concrete block as claimed in claim 1, wherein: the fine aggregate comprises one or more of fly ash, lime, gypsum, slag, talcum powder, mica powder, zircon powder, micro-silica powder, vermiculite powder, fluorite powder, shell powder, zircon sand and eggshell powder.
3. The high-strength heat-preservation autoclaved aerated concrete block as claimed in claim 2, wherein: the fine aggregate comprises the following components in parts by mass:
20-30 parts of mica powder;
10-15 parts of shell powder;
20-25 parts of zircon sand.
4. The high-strength heat-preservation autoclaved aerated concrete block as claimed in claim 3, wherein: the fine aggregate comprises the following components in parts by mass:
27 parts of mica powder;
11 parts of shell powder;
22 parts of zircon sand.
5. The high-strength heat-preservation autoclaved aerated concrete block as claimed in any one of claims 1 to 4, wherein: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
0.3-0.9 part of diethyl succinate.
6. The high-strength heat-preservation autoclaved aerated concrete block as claimed in any one of claims 1 to 4, wherein: the water reducing agent is a polycarboxylic acid water reducing agent.
7. The high-strength heat-preservation autoclaved aerated concrete block as claimed in any one of claims 1 to 4, wherein: the foaming agent is aluminum powder.
8. The high-strength heat-preservation autoclaved aerated concrete block as claimed in any one of claims 1 to 4, wherein: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
1-2 parts of calcium tetrafluoroborate.
9. The high-strength heat-preservation autoclaved aerated concrete block as claimed in claim 8, wherein: the high-strength heat-preservation autoclaved aerated concrete block is also prepared from the following raw materials in parts by weight:
0.1-0.3 part of gadolinium chloride.
10. A preparation method of the high-strength heat-preservation autoclaved aerated concrete block as claimed in any one of claims 1 to 9, which is characterized in that: the method comprises the following steps:
step (1), mixing cement, water, fine aggregate and a water reducing agent, and uniformly stirring to form a premix;
adding the rest raw material components of the high-strength heat-preservation autoclaved aerated block into the premix, and reacting for 4-6min to obtain a concrete mixture;
step (3), stirring for 5-10min, pouring the concrete mixture into a mold, and standing for 10-12 h;
step (4), cutting the concrete mixture formed by standing still into the size of the actual required specification to form a building block brick blank;
and (5) carrying out autoclaved curing and molding on the building block brick blank to obtain the high-strength heat-preservation autoclaved aerated building block.
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