CN112679155A - Special machine-made sand composite material for composite floor slab member and preparation method thereof - Google Patents
Special machine-made sand composite material for composite floor slab member and preparation method thereof Download PDFInfo
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- CN112679155A CN112679155A CN202011424724.0A CN202011424724A CN112679155A CN 112679155 A CN112679155 A CN 112679155A CN 202011424724 A CN202011424724 A CN 202011424724A CN 112679155 A CN112679155 A CN 112679155A
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Abstract
The invention discloses a special machine-made sand composite material for a composite floor slab member, which is characterized by comprising the following components in parts by weight: 930 parts of coarse stone 870-containing materials, 195 parts of fine stone 165-containing materials, 520 parts of machine-made sand 490-containing materials, 50-90 parts of medium sand, 420 parts of ultra-fine sand 380-containing materials, 480 parts of cement 320-containing materials, 80-100 parts of water and 4.5-6.5 parts of additives. The invention also provides a preparation method of the special machine-made sand composite material for the composite floor slab member. The special machine-made sand composite material for the composite floor slab member disclosed by the invention has the advantages of good comprehensive performance, good durability, excellent mechanical property, high slump retaining capacity, strong bleeding resistance and frost resistance and good adaptability to cement.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a special machine-made sand composite material for a composite floor slab member and a preparation method thereof.
Background
In recent years, the development of houses towards industrialization, integration and assembly is an urgent need and inevitable development direction for innovation development and structure transformation of Chinese houses at present, and is also a development need for realizing green environmental protection and energy conservation in the house industry, and the assembly of the house building is a basis for realizing the industrialized development of the house building. The problem of floor slab assembly is urgently needed to be solved for realizing the integral assembly construction of the residential building. The use of laminated floor elements is an effective way to solve the problem of floor assembly.
The traditional building composite floor slab member mostly adopts a cast-in-place concrete structure, and the concrete generally consists of coarse aggregates, fine aggregates, cement, additives, water and additives. Wherein, the sand belongs to fine aggregate, and the mass of the sand accounts for about 30 percent. The sand is formed by rock under natural condition and is called natural sand. Along with the development of economy, natural sand resources are gradually exhausted, and excessive exploitation of natural sand also causes great pressure on environment and ecology. Meanwhile, the increase of the national infrastructure projects leads to the generation of machine-made sand, and the machine-made sand is a trend to replace natural sand as building sand.
The machine-made sand is artificial sand with good continuous gradation formed by removing soil, mining, mechanical crushing, washing and screening. The method has the advantages that the mud content is extremely low and is close to zero; the particles are regular and have no needle sheet shape; the compressive strength is high, and the strength of concrete is ensured; the particles are in an irregular shape, the stone is hard, the specific surface area is larger than that of river sand, the bonding performance is better, and the particles can form a better bonding effect with cement. Therefore, the concrete prepared by selecting proper machine-made sand has better comprehensive performance and is the first choice of concrete material of the composite heat-insulating external wallboard component of the fabricated building.
Chinese patent CN102951876A discloses a vibration-free self-compacting concrete composition, which is prepared from 100 parts of cement, 10-30 parts of fly ash, 20-50 parts of limestone powder, 0.8-2.0 parts of polycarboxylic acid water reducing agent, 250-350 parts of machine-made sand and 250-350 parts of broken stone, wherein the fineness of the limestone powder is not more than 100 meshes, and the coarse aggregate is natural coarse aggregate. Although the patent adopts the machine-made sand and the limestone powder to prepare the self-compacting concrete, the limestone powder has the mesh number smaller than 100 meshes (the particle size is about 154 mu m), the particle size is coarse, most of the limestone powder can only be filled in gaps among aggregates, the gaps among gelled materials are less filled, and the prepared concrete has the highest 28d strength of only 61.5MPa (C50 grade).
Therefore, the special machine-made sand composite material for the assembled building composite floor slab member, which has the advantages of good comprehensive performance, good durability, excellent mechanical property, high slump retaining capability, strong bleeding resistance and frost resistance and good adaptability to cement, is developed, meets the market demand, has wide market value and application prospect, and plays a very important role in promoting the further development of machine-made sand concrete materials.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the special machine-made sand composite material for the laminated floor slab member and the preparation method thereof, the preparation method is simple and easy to implement, the operation and the control are convenient, the preparation efficiency and the finished product qualification rate are high, and the economic value, the social value and the ecological value are high; the special machine-made sand composite material of the composite floor slab member prepared by the preparation method has the advantages of good comprehensive performance, good durability, excellent mechanical property, high slump retaining capability, strong bleeding resistance and frost resistance and good adaptability to cement.
In order to achieve the purpose, the invention adopts the technical scheme that: the special machine-made sand composite material for the composite floor slab member is characterized by comprising the following components in parts by weight: 930 parts of coarse stone 870-containing materials, 195 parts of fine stone 165-containing materials, 520 parts of machine-made sand 490-containing materials, 50-90 parts of medium sand, 420 parts of ultra-fine sand 380-containing materials, 480 parts of cement 320-containing materials, 80-100 parts of water and 4.5-6.5 parts of additives.
Preferably, the particle size of the coarse stone is 20-30 mm; the particle size of the fine stone is 1-5 mm.
Preferably, the fineness modulus of the machine-made sand is 2.5-3.5 mm; the fineness modulus of the medium sand is 1.5-2.5 mm; the fineness modulus of the superfine sand is 0.2-0.5 mm.
Preferably, the cement is at least one of ordinary portland cement, portland slag cement, portland pozzolanic cement and portland fly ash cement.
Preferably, the special machine-made sand composite material for the composite floor slab member further comprises 3-5 parts of silicon carbide nano fibers and 1-3 parts of attapulgite.
Preferably, the diameter of the silicon carbide nano fiber is 100-300nm, and the length-diameter ratio is (13-16) to 1.
Preferably, the particle size of the attapulgite is 1000-1200 meshes.
Preferably, the additive is prepared from the following raw materials in parts by weight: 3-6 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1-2 parts of sodium hexametaphosphate, 5-8 parts of sulfobutyl-beta-cyclodextrin and 3-6 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
Preferably, the poly-2-acrylamido-2-methylpropanesulfonic acid has a weight average molecular weight of from 3 to 5 ten thousand.
Another object of the present invention is to provide a method for preparing a special machine-made sand composite material for a composite floor slab member, which comprises the following steps: pouring the components in parts by weight into a stirrer, uniformly stirring, and tamping to obtain the special machine-made sand composite material for the composite floor slab member.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention provides a special machine-made sand composite material for a composite floor slab member and a preparation method thereof, wherein the preparation method is simple and easy to implement, convenient to operate and control, high in preparation efficiency and finished product qualification rate, and high in economic value, social value and ecological value; the special machine-made sand composite material of the composite floor slab member prepared by the preparation method has the advantages of good comprehensive performance, good durability, excellent mechanical property, high slump retaining capability, strong bleeding resistance and frost resistance and good adaptability to cement.
Detailed Description
The following detailed description of preferred embodiments of the invention will be made.
The special machine-made sand composite material for the composite floor slab member is characterized by comprising the following components in parts by weight: 930 parts of coarse stone 870-containing materials, 195 parts of fine stone 165-containing materials, 520 parts of machine-made sand 490-containing materials, 50-90 parts of medium sand, 420 parts of ultra-fine sand 380-containing materials, 480 parts of cement 320-containing materials, 80-100 parts of water and 4.5-6.5 parts of additives.
Preferably, the particle size of the coarse stone is 20-30 mm; the particle size of the fine stone is 1-5 mm.
Preferably, the fineness modulus of the machine-made sand is 2.5-3.5 mm; the fineness modulus of the medium sand is 1.5-2.5 mm; the fineness modulus of the superfine sand is 0.2-0.5 mm.
Preferably, the cement is at least one of ordinary portland cement, portland slag cement, portland pozzolanic cement and portland fly ash cement.
Preferably, the special machine-made sand composite material for the composite floor slab member further comprises 3-5 parts of silicon carbide nano fibers and 1-3 parts of attapulgite.
Preferably, the diameter of the silicon carbide nano fiber is 100-300nm, and the length-diameter ratio is (13-16) to 1.
Preferably, the particle size of the attapulgite is 1000-1200 meshes.
Preferably, the additive is prepared from the following raw materials in parts by weight: 3-6 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1-2 parts of sodium hexametaphosphate, 5-8 parts of sulfobutyl-beta-cyclodextrin and 3-6 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
Preferably, the poly-2-acrylamido-2-methylpropanesulfonic acid has a weight average molecular weight of from 3 to 5 ten thousand.
Another object of the present invention is to provide a method for preparing a special machine-made sand composite material for a composite floor slab member, which comprises the following steps: pouring the components in parts by weight into a stirrer, uniformly stirring, and tamping to obtain the special machine-made sand composite material for the composite floor slab member.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention provides a special machine-made sand composite material for a composite floor slab member and a preparation method thereof, wherein the preparation method is simple and easy to implement, convenient to operate and control, high in preparation efficiency and finished product qualification rate, and high in economic value, social value and ecological value; the special machine-made sand composite material of the composite floor slab member prepared by the preparation method has the advantages of good comprehensive performance, good durability, excellent mechanical property, high slump retaining capability, strong bleeding resistance and frost resistance and good adaptability to cement.
The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:
example 1
The embodiment 1 provides a special machine-made sand composite material for a composite floor member, which is characterized by comprising the following components in parts by weight: 870 parts of coarse stone, 165 parts of fine stone, 490 parts of machine-made sand, 50 parts of medium sand, 380 parts of extra-fine sand, 320 parts of cement, 80 parts of water and 4.5 parts of an additive.
The particle size of the coarse stone is 20 mm; the particle size of the fine stone is 1 mm; the fineness modulus of the machine-made sand is 2.5 mm; the fineness modulus of the medium sand is 1.5 mm; the fineness modulus of the superfine sand is 0.2 mm; the cement is ordinary portland cement.
The special machine-made sand composite material for the composite floor slab component also comprises 3 parts of silicon carbide nano fibers and 1 part of attapulgite; the diameter of the silicon carbide nano fiber is 100nm, and the length-diameter ratio is 13: 1; the particle size of the attapulgite is 1000 meshes.
The additive is prepared from the following raw materials in parts by weight: 3 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1 part of sodium hexametaphosphate, 5 parts of sulfobutyl-beta-cyclodextrin and 3 parts of poly (2-acrylamide-2-methylpropanesulfonic acid); the weight average molecular weight of the poly-2-acrylamide-2-methylpropanesulfonic acid is 3 ten thousand.
A preparation method of a special machine-made sand composite material for a composite floor slab member is characterized by comprising the following steps: pouring the components in parts by weight into a stirrer, uniformly stirring, and tamping to obtain the special machine-made sand composite material for the composite floor slab member.
Example 2
Embodiment 2 provides a special machine-made sand composite material for a laminated floor member, which has a formulation and a preparation method basically the same as those of embodiment 1, except that the composite material comprises the following components in parts by weight: 890 parts of coarse stone, 175 parts of fine stone, 500 parts of machine-made sand, 60 parts of medium sand, 390 parts of extra-fine sand, 350 parts of cement, 85 parts of water, 5 parts of an additive, 3.5 parts of silicon carbide nano fiber and 1.5 parts of attapulgite; the additive is prepared from the following raw materials in parts by weight: 4 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1.2 parts of sodium hexametaphosphate, 6 parts of sulfobutyl-beta-cyclodextrin and 3.5 parts of poly-2-acrylamide-2-methylpropanesulfonic acid.
Example 3
Embodiment 3 provides a special machine-made sand composite material for a laminated floor member, which has a formulation and a preparation method basically the same as those of embodiment 1, except that the composite material comprises the following components in parts by weight: 900 parts of coarse stone, 180 parts of fine stone, 505 parts of machine-made sand, 70 parts of medium sand, 400 parts of extra-fine sand, 400 parts of cement, 90 parts of water, 5.5 parts of an additive, 4 parts of silicon carbide nano fiber and 2 parts of attapulgite; the additive is prepared from the following raw materials in parts by weight: 4.5 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1.5 parts of sodium hexametaphosphate, 6.5 parts of sulfobutyl-beta-cyclodextrin and 4.5 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
Example 4
Embodiment 4 provides a special machine-made sand composite material for a laminated floor member, which has a formulation and a preparation method substantially the same as those of embodiment 1, except that the composite material comprises the following components in parts by weight: 920 parts of coarse stone, 190 parts of fine stone, 515 parts of machine-made sand, 85 parts of medium sand, 415 parts of extra-fine sand, 470 parts of cement, 95 parts of water, 6.3 parts of an additive, 4.7 parts of silicon carbide nano fiber and 2.5 parts of attapulgite; the additive is prepared from the following raw materials in parts by weight: 5.5 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1.8 parts of sodium hexametaphosphate, 7.5 parts of sulfobutyl-beta-cyclodextrin and 5.5 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
Example 5
Embodiment 5 provides a special machine-made sand composite material for a laminated floor member, which has a formulation and a preparation method substantially the same as those of embodiment 1, except that the composite material comprises the following components in parts by weight: 930 parts of coarse stones, 195 parts of fine stones, 520 parts of machine-made sand, 90 parts of medium sand, 420 parts of extra-fine sand, 480 parts of cement, 100 parts of water, 6.5 parts of additives, 5 parts of silicon carbide nano fibers and 3 parts of attapulgite; the additive is prepared from the following raw materials in parts by weight: 6 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 2 parts of sodium hexametaphosphate, 8 parts of sulfobutyl-beta-cyclodextrin and 6 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
Comparative example 1
Comparative example 1 a composite material of special machine-made sand for a laminated floor structure was provided, which was formulated and prepared in substantially the same manner as in example 1, except that no machine-made sand was added.
Comparative example 2
Comparative example 2 provides a special machine-made sand composite for a laminated floor structure, which was formulated and prepared in substantially the same manner as in example 1, except that silicon carbide nanofibers were not added.
Comparative example 3
Comparative example 3 provides a tailored machine-made sand composite for a laminated floor structure, having substantially the same formulation and preparation method as in example 1, except that attapulgite and 2, 4, 6-tris (4-carboxyphenyl) -1, 3, 5-triazine are not added.
Comparative example 4
Comparative example 4 provides a composite structural member of a composite floor slab, formulated and prepared substantially as in example 1, except that sulfobutyl-beta-cyclodextrin and poly-2-acrylamido-2-methylpropanesulfonic acid were not added.
In order to further explain the beneficial technical effects of the special machine-made sand composite material for the composite floor slab member related to each embodiment of the invention, the special machine-made sand composite material for the composite floor slab member related to each embodiment is subjected to a performance test, the test result is shown in table 1, and the test method is shown in corresponding national standard of China.
As can be seen from table 1, the composite sand material disclosed in the embodiment of the present invention has better and excellent combination properties, which is the result of the synergistic effect of the components.
TABLE 1
The above-mentioned embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The special machine-made sand composite material for the composite floor slab member is characterized by comprising the following components in parts by weight: 930 parts of coarse stone 870-containing materials, 195 parts of fine stone 165-containing materials, 520 parts of machine-made sand 490-containing materials, 50-90 parts of medium sand, 420 parts of ultra-fine sand 380-containing materials, 480 parts of cement 320-containing materials, 80-100 parts of water and 4.5-6.5 parts of additives.
2. The special machine-made sand composite material for the composite floor member as claimed in claim 1, wherein the particle size of the coarse stone is 20-30 mm; the particle size of the fine stone is 1-5 mm.
3. The special machine-made sand composite material for the composite floor member as claimed in claim 1, wherein the fineness modulus of the machine-made sand is 2.5-3.5 mm; the fineness modulus of the medium sand is 1.5-2.5 mm; the fineness modulus of the superfine sand is 0.2-0.5 mm.
4. A composite engineered sand material for laminated floor elements as claimed in claim 1, wherein said cement is at least one of portland cement slag cement, portland pozzolan cement and portland fly ash cement.
5. The composite special-purpose machine-made sand material for laminated floor slab members as claimed in claim 1, wherein the composite special-purpose machine-made sand material for laminated floor slab members further comprises 3-5 parts of silicon carbide nano fibers and 1-3 parts of attapulgite.
6. The composite special machine-made sand material for laminated floor slab member as claimed in claim 5, wherein the diameter of the silicon carbide nano fiber is 100-300nm, and the length-diameter ratio is (13-16): 1.
7. The composite special machine-made sand material for laminated floor slab members as claimed in claim 5, wherein the particle size of the attapulgite is 1000-1200 mesh.
8. The special machine-made sand composite material for the composite floor member as claimed in claim 1, wherein the additive is prepared from the following raw materials in parts by weight: 3-6 parts of 2, 4, 6-tri (4-carboxyphenyl) -1, 3, 5-triazine, 1-2 parts of sodium hexametaphosphate, 5-8 parts of sulfobutyl-beta-cyclodextrin and 3-6 parts of poly 2-acrylamide-2-methylpropanesulfonic acid.
9. The composite special machine-made sand material for laminated floor members as claimed in claim 8, wherein the poly 2-acrylamide-2-methylpropanesulfonic acid has a weight average molecular weight of 3-5 ten thousand.
10. A method of making a composite machine-made sand material for composite floor elements according to any one of claims 1 to 9, comprising the steps of: pouring the components in parts by weight into a stirrer, uniformly stirring, and tamping to obtain the special machine-made sand composite material for the composite floor slab member.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116082003A (en) * | 2023-02-23 | 2023-05-09 | 常州大学 | Machine-made sand recycled concrete of composite floor slab member and preparation method thereof |
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| CN109111170A (en) * | 2018-09-04 | 2019-01-01 | 徐州金盟新型建材有限公司 | A kind of machine-made sand concrete composition |
| CN111470801A (en) * | 2020-04-07 | 2020-07-31 | 石旭艳 | Concrete retarder with good uniform mixing and plasticity retention |
| CN111792885A (en) * | 2020-07-16 | 2020-10-20 | 陕西红旗汇石建筑制品有限公司 | High-workability environment-friendly pumping concrete |
| CN111943587A (en) * | 2020-07-29 | 2020-11-17 | 曹均云 | Recycled concrete and preparation method thereof |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104944872A (en) * | 2015-06-18 | 2015-09-30 | 关其焕 | Cement concrete pavement self-repair material and preparation method thereof |
| CN109111170A (en) * | 2018-09-04 | 2019-01-01 | 徐州金盟新型建材有限公司 | A kind of machine-made sand concrete composition |
| CN111470801A (en) * | 2020-04-07 | 2020-07-31 | 石旭艳 | Concrete retarder with good uniform mixing and plasticity retention |
| CN111792885A (en) * | 2020-07-16 | 2020-10-20 | 陕西红旗汇石建筑制品有限公司 | High-workability environment-friendly pumping concrete |
| CN111943587A (en) * | 2020-07-29 | 2020-11-17 | 曹均云 | Recycled concrete and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116082003A (en) * | 2023-02-23 | 2023-05-09 | 常州大学 | Machine-made sand recycled concrete of composite floor slab member and preparation method thereof |
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