CN110615648A - Decorative cement - Google Patents
Decorative cement Download PDFInfo
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- CN110615648A CN110615648A CN201810641166.XA CN201810641166A CN110615648A CN 110615648 A CN110615648 A CN 110615648A CN 201810641166 A CN201810641166 A CN 201810641166A CN 110615648 A CN110615648 A CN 110615648A
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- cement
- decorative
- surface area
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides decorative cement, and belongs to the technical field of building materials. The decorative cement comprises the following raw materials in percentage by weight: 75-85% of Portland cement, 10-14% of fly ash, 6-10% of limestone powder, 0.02-0.04% of additive in the amount of cement, and 0.02-0.04% of grinding aid in the amount of cement. The decorative cement has the characteristics of low water demand, good water retention, high early strength, drying shrinkage resistance, good construction performance, good durability, ecology and environmental protection, and is suitable for various industrial and residential decoration projects.
Description
Technical Field
The invention relates to decorative cement, and belongs to the technical field of building materials.
Background
The existing decorative cement comprises white cement and colored cement, is mainly used for building decorative surface engineering materials, such as ground, exposed surfaces, ceilings, stairs, pillars, steps and the like, can be made into decorative surfaces such as colored mortar, concrete, terrazzo, water brushed stone and the like, decorative surface building blocks such as pedestrian and pedestrian paving tiles and the like, can also be used for sculptures and decorative products, and can be used as ceramic tile bonding caulking materials and the like. Compared with natural decorative materials, the decorative cement has the advantages of convenient use, easy color adjustment, low price and the like, but has poor strength performance and is easy to break and fracture under impact. The contact material has different surface water absorbability, so that the contact material is easy to crack and the like. The existing decoration cement mostly uses general cement, a plurality of performances can not meet the requirements of decoration engineering, not only brings inconvenience for decoration, but also reduces the quality of buildings and causes serious accidents. Along with the improvement of living standard of people, the requirement on decoration cement is higher and higher, and the cement has the requirements of excellent quality and healthy environmental protection.
Disclosure of Invention
In order to solve the problems, the invention provides decorative cement which uses green and environment-friendly additives through the selection of raw materials and the specific proportioning design to achieve the effects of performance improvement and health and environmental protection.
In order to achieve the above object, the technical solution of the present invention is as follows:
the high-performance environment-friendly decorative cement is characterized in that: the composite material comprises the following raw materials in percentage by weight: 75-85% of Portland cement, 10-14% of fly ash and 6-10% of limestone powder. 0.02-0.04% of additive and 0.02-0.04% of grinding aid.
The addition of the additive realizes good water retention, and particularly, the additive is dissolved in water to serve as a protective colloid to wrap particles and form a layer of lubricating film on the outer surface of the protective colloid, so that a cement paste system is more stable, and the fluidity of the cement paste in the stirring process and the smoothness of construction are improved. The grinding aid can greatly reduce the phenomenon of electrostatic adsorption ball inclusion formed in the grinding process, reduce the tendency of secondary coalescence of ultrafine particles in cement particles, improve the distribution of the cement particles and excite the hydration power, thereby improving the early strength and the later strength of the cement. The additive and the grinding aid belong to environment-friendly materials, are beneficial to human health, and can ensure that the cement provided by the invention has specific environment-friendly performance.
In order to better implement the invention, further, the portland cement is different from the conventional general portland cement, the strength grade of the portland cement used in the invention is 42.5 or 52.5, and the clinker three-rate value is as follows: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
Further, the specific surface area of the portland cement is 300-400 m2A density of 3.0 to 3.5 m/kg3/kg。
Furthermore, the specific surface area of the fly ash is 350-450 m2/kg，SO31.0 to 1.5%, and a density of 2.0 to 2.5m3/kg。
Furthermore, the specific surface area of the limestone is 550-650 m2/kg，SO33.0 to 3.5%, and a density of 2.5 to 3.0m3/kg。
Furthermore, the additive is any two of lignin, hydroxypropyl methyl cellulose, starch ether and latex powder.
Further, the grinding aid is any one of triethanolamine, polyether alcohol amine and polymer alcohol amine.
When the decorative cement is prepared, the raw materials are ground to the corresponding specific surface area in advance and then stored, then weighed according to the weight ratio, uniformly mixed in a continuous mixing stirrer and sealed for later use. When in use, water and sand are added according to the required proportion of product varieties and are stirred uniformly.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
the decorative cement comprises the following raw materials in percentage by weight: 76% of Portland cement, 14% of fly ash and 10% of limestone powder. The additive accounts for 0.02 percent of the cement dosage, and the grinding aid accounts for 0.02 percent of the cement dosage. In this example, the portland cement is 32.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
Specific surface area of 353m2Per kg, density 3.4m3/kg。
In this example, the specific surface area of the fly ash was 367m2/kg，SO31.2% and a density of 2.4m3/kg。
In this example, the limestone specific surface area was 642m2/kg，SO33.0% and a density of 2.7m3/kg。
In the embodiment, the admixture is starch ether and mineral lignin, wherein the starch ether accounts for 0.005% of the using amount of the cement, and the mineral lignin accounts for 0.015% of the using amount of the cement.
Example 2:
the decorative cement comprises the following raw materials in percentage by weight: 78% of Portland cement, 13% of fly ash and 9% of limestone powder. The additive accounts for 0.025 percent of the using amount of the cement, and the grinding aid accounts for 2.5 percent of the weight of the cement.
In this example, the portland cement is 32.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
The specific surface area is 393m2Per kg, density 3.5m3/kg。
In this example, the specific surface area of the fly ash was 446m2/kg，SO31.0% and a density of 2.1m3/kg。
In this example, the limestone specific surface area was 602m2/kg，SO33.1% and a density of 2.7m3/kg。
In the embodiment, the additive is lignin and latex powder, wherein the lignin accounts for 0.008% of the cement, and the latex powder accounts for 0.017% of the cement.
Example 3:
the decorative cement comprises the following raw materials in percentage by weight: 80% of Portland cement, 12% of fly ash and 8% of limestone powder. The additive accounts for 0.03 percent of the cement dosage, and the grinding aid accounts for 0.03 percent of the cement weight.
In this example, the portland cement is 32.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
The specific surface area is 399m2Per kg, density 3.25m3/kg。
In this example, the specific surface area of the fly ash is 398m2/kg，SO31.1% and a density of 2.1m3/kg。
In this example, the limestone specific surface area is 582m2/kg，SO33.1% and a density of 2.5m3/kg。
In the embodiment, the admixture is lignin and hydroxypropyl methyl cellulose, wherein the lignin accounts for 0.01% of the cement amount, and the hydroxypropyl methyl cellulose accounts for 0.02% of the cement amount.
Example 4:
the decorative cement comprises the following raw materials in percentage by weight: 82% of Portland cement, 11% of fly ash and 7% of limestone powder. The additive accounts for 0.034% of the cement dosage, and the grinding aid accounts for 3.5% of the cement weight.
In this example, the portland cement is 42.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
Specific surface area of 322m2Per kg, density 3.4m3/kg。
In this example, the specific surface area of the fly ash was 365m2/kg，SO31.0% and a density of 2.3m3/kg。
In this example, the limestone specific surface area is 594m2/kg，SO33.5% and a density of 2.7m3/kg。
In the embodiment, the additive is latex powder and hydroxypropyl methyl cellulose, the latex powder accounts for 0.012 percent of the using amount of the cement, and the hydroxypropyl methyl cellulose accounts for 0.022 percent of the using amount of the cement.
Example 5:
the decorative cement comprises the following raw materials in percentage by weight: 85% of Portland cement, 11% of fly ash and 6% of limestone powder. The additive accounts for 0.035% of the cement dosage, and the grinding aid accounts for 4% of the cement weight.
In this example, the portland cement is 42.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
Specific surface area of 367m2Per kg, density 3.1m3/kg。
In this example, the specific surface area of the fly ash was 445m2/kg，SO31.5% and a density of 2.4m3/kg。
In this example, the limestone specific surface area was 650m2/kg，SO33.0% and a density of 2.5m3/kg。
In the embodiment, the additive is lignin and amylase, wherein the lignin accounts for 0.015% of the using amount of the cement, and the amylase accounts for 0.02% of the using amount of the cement.
Example 6:
the decorative cement comprises the following raw materials in percentage by weight: 80% of Portland cement, 12% of fly ash and 8% of limestone powder. The grinding aid accounts for 0.03 percent of the weight of the cement.
In this example, the portland cement is 42.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
The specific surface area is 399m2Per kg, density 3.25m3/kg。
In this example, the specific surface area of the fly ash was 403m2/kg，SO31.1% and a density of 2.1m3/kg。
In this example, the limestone specific surface area is 582m2/kg，SO33.1% and a density of 2.5m3/kg。
In this example, the grinding aid accounted for 0.03% by weight of the cement.
Example 7:
the decorative cement comprises the following raw materials in percentage by weight: 80% of Portland cement, 12% of fly ash and 8% of limestone powder. The additive accounts for 0.03 percent of the cement consumption.
In this example, the portland cement is 42.5 strength grade portland cement, and the clinker three-rate value is: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
The specific surface area is 399m2Per kg, density 3.25m3/kg。
In this example, the specific surface area of the fly ash was 397m2/kg，SO31.1% and a density of 2.1m3/kg。
In this example, the limestone specific surface area is 592m2/kg，SO33.0% and a density of 2.6m3/kg。
In the embodiment, the admixture is lignin and hydroxypropyl methyl cellulose, wherein the lignin accounts for 0.01% of the cement amount, and the hydroxypropyl methyl cellulose accounts for 0.02% of the cement amount.
The performance tests of the cement paste in the above examples 1-7 were carried out according to the mixture ratio, the water cement ratio was 0.5: 1, the comparison group was 32.5 strength grade decorative cement on the market, and the water material ratio was 0.5: 1. The specific detection standard and method are as follows: the compression strength is detected by a method of a standard GB/T17671-1999 cement mortar strength test. The performance test indexes of the commercially available decorative cement mortars in the embodiments 1 to 5 and the prior art are shown in the following table 1:
table 1 performance test indexes of commercially available decorative cement mortars in examples 1 to 7 and prior art
As can be seen from Table 1, after the high-performance environment-friendly decorative cement disclosed by the invention is prepared into mortar, the consistency and the water retention rate are both more than 85%, the gas content is greatly reduced, the performance is remarkably improved compared with that of commercially available cement, and particularly, the optimal example 3 has a breakthrough of both the consistency and the water retention rate of 90%, and the gas content is 2%. The high-performance environment-friendly decorative cement completely meets the decoration requirement.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The decorative cement is characterized in that: the composite material comprises the following raw materials in percentage by weight: 75-85% of Portland cement, 10-14% of fly ash, 6-10% of limestone powder, 0.02-0.04% of additive and 0.02-0.04% of grinding aid.
2. The decorative cement of claim 1, wherein: preferably, the strength grade of the portland cement is 42.5 or 52.5, and the clinker three-rate value is as follows: KH: 0.92 ± 0.02 n: 2.7 plus or minus 0.1; p: 1.6 plus or minus 0.1; the mineral composition of the mineral is more than or equal to 7.5C3A≤8.5％；C3S≥50％；C2S≥15％；12％≤C4AF≤16％。
3. The decorative cement of claim 1, wherein: the specific surface area of the portland cement is 300-400 m2A density of 3.0 to 3.5 m/kg3/kg。
4. The decorative cement of claim 1, wherein: the specific surface area of the fly ash is 350-450 m2/kg，SO31.0 to 1.5%, and a density of 2.0 to 2.5m3/kg。
5. The decorative cement of claim 1, wherein: the using amount of the fly ash is 11-13%.
6. The decorative cement of claim 1, wherein: the specific surface area of the limestone powder is 550-650 m2A density of 2.5 to 3.0 m/kg3/kg。
7. The decorative cement of claim 1, wherein: the additive is the combination of any two of lignin, hydroxypropyl methyl cellulose, starch ether and latex powder.
8. The decorative cement of claim 1, wherein: the grinding aid is any one of triethanolamine, polyether alcohol amine and polymer alcohol amine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810641166.XA CN110615648A (en) | 2018-06-20 | 2018-06-20 | Decorative cement |
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| CN201810641166.XA CN110615648A (en) | 2018-06-20 | 2018-06-20 | Decorative cement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466462A (en) * | 2021-10-14 | 2022-12-13 | 苏州瑞高新材料有限公司 | Preparation method of 3D precision Ethylene Propylene Diene Monomer (EPDM) embossing roller die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115466462A (en) * | 2021-10-14 | 2022-12-13 | 苏州瑞高新材料有限公司 | Preparation method of 3D precision Ethylene Propylene Diene Monomer (EPDM) embossing roller die |
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