SK812021U1 - Cement-plastic mixture - Google Patents

Abstract

Cement-plastic mixture is formed by a basic cement-plastic mixture comprising 29 to 43 % by weight of crushed plastic material, 56 to 69 % by weight of cement and 1,0 to 2,0 % by weight of superplastificator. The mixture further comprises addition of 6,0 to 12 % of sand having fraction 0,3 to 2,00 mm and 4,0 to 14,0 % by weight of water.

Description

SK 81-2021 U1

Technical field

The technical solution concerns a cement-plastic mixture usable for the production of construction and stone products. The technical solution falls into the field of construction and stonemasonry.

Prior art

At present, products based on cement, silica sand and crushed stone, granite or marble are commonly known in the field of construction and stonework, such as e.g. Now.

RU 2739910 C1 is known in the prior art, which describes a polymer-cement dry construction mixture which contains Portland cement, a polymeric binder, sand, glass fiber and a modifier. The polymeric binder is a redispersible polyvinyl acetate polymer powder or polyvinyl acetate copolymers.

Also known from CN 112063160 A is a two-component fast-curing plastic cement, where the first component is a polyether polyol, a curing agent, a surface hydroxylated modified paraffin, a thickener and a solid filler. The second component is a polyether polyol, a catalyst, a crosslinking agent, a hydroxyl surface modified paraffin, a thickener and a solid. Paraffin with a certain hydroxyl content is introduced into these two components.

There was also a tendency to mix acrylate rubber asphalt into the cement, as in the utility model SK 1692 U, in order to reduce the bulk density, increase the thermal insulation properties and ensure water impermeability.

It is also known to build a building composition comprising cement and paper pulp as described in utility model SK 4239 U, whereby savings in production costs and weight reduction of the product are achieved.

The problem of cement mixtures, which has not yet been fully explored, has evoked at present the design of a cement mixture that would allow the ecological use and consumption of plastic waste. The result of this effort is the cement-plastic mixture described in this technical solution.

The essence of the technical solution

The above-mentioned problem of cement mixtures is solved by the proposed cement-plastic mixture according to the technical solution in dry or wet form. The essence of the technical solution lies in the fact that, depending on the composition, the dry mixture contains three basic components. These are crushed plastics, preferably which cannot be further recycled. It is possible to use plastics of all kinds with a fraction of 1 mm to 20 mm, possibly also a higher fraction, or chopped plastic strips, except for plastic pellets. It is also cement, e.g. Portland gray or white with a strength of 32.5 MPa to 52.5 MPa. Finally, it is a superplasticizer e.g. with a density of 20/40 based on melamine-formaldehyde resin. This dry cement-plastic mixture can be packaged e.g. into paper bags and at the point of use it is only mixed with water. Additional ingredients such as: silica sand with a fraction of 0.3 mm to 2.0 mm are added to these three basic components according to the needs of the consumer; solidification accelerator, e.g. Betodur A5; synthetic fibers, e.g. ARC 42/30 mm and powder paint. In the case of a wet cementitious plastic mixture which is mixed at the place of use or production, water is also considered as an additional component.

The essence of the technical solution is complemented by the percentage of individual components of the cement-plastic mixture. The cement-plastic mixture in the basic components contains:

% wt. up to 43% by weight plastic crumb% wt. up to 69 wt. cement

1.0 wt. up to 2.0 wt. superplasticizer.

Further to 100 wt. At least one additional additive component may be added to the cement-plastic mixture containing:

6.0 wt. up to 12 wt. silica sand

0.4 wt. up to 0.9 wt. solidification accelerator

0.04% by weight up to 0.07 wt. synthetic ARC fibers

0.02% by weight up to 0.08 wt. dyes

4.0 wt. up to 14.0 wt. of water 4.0 wt. up to 10 wt. of SiO 2 microsilicate by weight of cement

The advantages of the cement-plastic mixture according to the technical solution are obvious from its effects, which are manifested externally. The effects and originality lie in its unique composition, where the goal of the cement-plastic mixture is to save costs by using a cheap input raw material - plastic waste, as well as to reduce the weight of the final product. The undeniable benefit is the fact that the products made of this cement-plastic mixture

SK 81-2021 U1 visually resemble terrazzo. This effect is achieved by replacing marble crumb with plastic waste crumb, which reduces costs by up to 80%. According to the technical solution, products made of cement-plastic mixture leave a lower carbon footprint and at the same time the problem with one of the most difficult to recycle plastic waste is solved. Decades of degraded plastic, even when exposed to sunlight, can be processed in this way. Adding plastic wood gives the product its surface structure, mosaic and adding synthetic fibers gives the product flexibility to prevent cracking. Adding silica sand adds stiffness to the product.

From this cement-plastic mixture according to the technical solution it is possible to produce garden furniture e.g. benches, flower pots, rubbish baskets, tables, large-format paving, solid elements and cast prefabricated parts that can be cut, sanded, sandblasted, impregnated, etc. machined with chip or non-chip technologies.

Examples of embodiments

It is understood that the individual embodiments of the cement-plastic mixture according to the technical solution are presented for illustration and not as limitations of the technical solutions. Those skilled in the art will find, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the cementitious plastic composition of the invention. Such equivalents will also fall within the scope of the protection claims.

For those skilled in the art, it cannot be a problem of optimal mixing of the individual components of the cement-plastic mixture, therefore these features have not been solved in detail.

Example 1

In this example of a specific embodiment of the subject of the technical solution, a dry basic cement-plastic mixture is described for products with a surface treatment by grinding packed in paper bags intended mainly for small consumers. The dry base cement-plastic mixture contains:

kg of plastic crumb, which is 42.7% by weight.

kg of gray cement 42.5 (alternatively gray cement 52.5), which is 56.1% by weight.

0.5 kg of Melment 20/40 superplasticizer, which is 1.2% by weight.

Example 2

In this example of a specific embodiment of the subject of the technical solution, a dry standard cement-plastic mixture for products with a surface treatment by grinding packed in paper bags is described, intended mainly for small consumers. The dry standard cement-plastic mixture contains:

kg of plastic crumb, which is 42.7% by weight.

kg of gray cement 42.5 (alternatively white cement 52.5), which is 56.1% by weight.

0.5 kg of superplasticizer with a density of 20/40 based on melamine formaldehyde, which is 1.2% by weight.

The three basic components represent 100% by weight of the masterbatch to which additives are added on behalf of at least one component:

kg of silica sand with a fraction of 0.8 mm, which is 6.7% by weight.

0.2 kg of Betodur A5 setting accelerator, which is 0.47% by weight.

0.022 kg of ARC 42/30 synthetic fibers, which is 0.05% by weight. 0.004 kg of dye, which is 0.01% by weight.

Example 3

In this example of a specific embodiment of the subject of the technical solution, a wet base as well as a standard cement-plastic mixture for products with a surface treatment by grinding is described. The basis is the mixtures described in Examples 1 and 2, the further addition being 5 liters of water, which represents 11.2% by weight, per 100% by weight, of the base mixture.

Example 4

In this example of a specific embodiment of the subject of the technical solution, a dry basic cement-plastic mixture for uncut products packed in paper bags intended mainly for small consumers is described. The dry base cement-plastic mixture contains:

kg of plastic crumb, which is 38% by weight.

kg of gray cement 42.5 (alternatively gray cement 52.5), which is 60.1% by weight.

0.8 kg of superplasticizer with a density of 20/40 based on melamine formaldehyde, which is 1.9% by weight.

SK 81-2021 U1

Example 5

In this example of a specific embodiment of the subject of the technical solution, a dry standard cement-plastic mixture for uncut products packed in paper bags intended mainly for small consumers is described. The dry standard cement-plastic mixture contains:

kg of plastic crumb, which is 38% by weight.

kg of gray cement 42.5 (alternatively white cement 52.5), which is 60.1% by weight.

0.8 kg of superplasticizer with a density of 20/40 based on melamine formaldehyde, which is 1.9% by weight.

The three basic components represent 100% by weight of the masterbatch to which additives are added on behalf of at least one component:

kg of silica sand with a fraction of 0.8 mm, which is 12% by weight.

0.4 kg of Betodur A5 setting accelerator, which is 0.9% by weight.

0.022 kg of ARC 42/30 synthetic fibers, which is 0.05% by weight.

0.004 kg of dye, which is 0.01% by weight.

2.5 kg of SiO ₂ microsilicate, which is a 10% cement mass.

Example 6

In this example of a specific embodiment of the subject of the technical solution, a wet base as well as a standard cement-plastic mixture for unground products is described. The basis is the mixtures described in Examples 4 and 5, the further addition being 1.7 liters of water, which represents 4% by weight, per 100% by weight, of the base mixture.

Industrial applicability

The cement-plastic mixture according to this technical solution is intended for the field of construction and stonemasonry.

Claims (7)

SK 81-2021 U1 CLAIMS FOR PROTECTION Cement-plastic mixture, characterized in that it consists of a basic cement-plastic mixture which contains 29% by weight. up to 43% by weight of plastic crumb, 56 wt. up to 69 wt. of cement and 1.0 wt. up to 2.0 wt. superplasticizer. Cement-plastic mixture according to Claim 1, characterized in that 100% by weight of the basic cement-plastic mixture contains an addition of 6.0 wt. up to 12 wt. silica sand with a fraction of 0.3 mm to 2.0 mm. Cement-plastic mixture according to Claim 1, characterized in that 100% by weight of the basic cement-plastic mixture contains an addition of 0.4 wt. up to 0.9 wt. solidification accelerator. Cement-plastic mixture according to Claim 1, characterized in that 100% by weight of the basic cement-plastic mixture contains an addition of 0.04% by weight. up to 0.07 wt. synthetic ARC fibers. Cement-plastic mixture according to Claim 1, characterized in that 100 wt. of the basic cement-plastic mixture contains an addition of 0.01 wt. up to 0.08 wt. dyes. Cement-plastic mixture according to Claim 1, characterized in that 100 wt. of the basic cement-plastic mixture contains an addition of 4.0% by weight. up to 14.0 wt. water. Cement-plastic mixture according to Claim 1, characterized in that 100% by weight of the basic cement-plastic mixture contains an addition of 4.0% by weight. up to 10 wt. of SiO 2 microsilicate by weight of cement. End of document