RU2402590C1 - Raw mix and method for manufacturing of flat and corrugated sheet - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: raw mix contains the following components, wt %: domestic and industrial wastes of polyethylene 25-30, granulated blast-furnace slag with size of 1-3 mm 25-30, granulated blast-furnace slag with size of 0-1 mm 15-20, pit sand - waste of iron ore dressing - balance. Method includes laying raw mix in mould, its compaction and heating. Layer of mix heated below binder melt temperature is laid in mould, reinforcement net of high-strength threads is laid over, the second layer of mixture is applied and exposed to hot pressing.

EFFECT: reduced duration of sheets manufacturing, exclusion of carcinogenic substance - asbestos and expensive low-quality binder - cement from mix composition, substitution of deficit cement with domestic and industrial wastes of polyethylene, increased flexural strength.

2 cl, 1 tbl

Description

The invention relates to construction materials, namely, mixtures for the manufacture of roofing material (roof tiles, roof tiles).

Known raw mix for the manufacture of tiles, consisting of clay [1]. The disadvantage of this mixture is the low quality of the tiles, low bending strength. A known method of manufacturing tiles by pressing clay. The disadvantage of this method is that during subsequent drying and firing, the tiles crack, a large amount of marriage is formed.

Closest to the proposed is a method of manufacturing a flat and corrugated sheet by deposition of sheets from a cement-asbestos mortar with a suction of the solution through the fabric [2]. In this method, the cement-asbestos mixture is deposited from the solution onto the fabric, followed by drying. The disadvantage of this method is the long period of hydration, hardening and curing with an asbestos-cement mixture.

The problem solved by the invention is to increase the bending strength, the exclusion from the composition of the raw material mixture of a carcinogenic substance of asbestos, reducing the period of manufacture of the sheets.

The technical result achieved by the implementation of the invention is to reduce the duration of the manufacture of sheets, the exclusion of a mixture of a carcinogenic substance of asbestos and expensive low-quality binder - cement, in the replacement of scarce cement with household and industrial waste polyethylene; increased bending strength.

To achieve the technical result provided by the invention, the raw material mixture for the manufacture of sheets, including a binder, aggregates, is characterized in that it contains household and industrial waste polyethylene as a binder, contains blast furnace granulated slag with a grain size of 1-3 mm, blast furnace granulated slag with a grain size of 0- 1 mm, mountain sand - waste iron ore concentration in the following ratio of components, wt.%:

household and industrial waste polyethylene 25-30 granulated blast furnace slag with a grain size of 1-3 mm 25-30 granulated blast furnace slag with a particle size of 0-1 mm 15-20 mountain sand - iron ore dressing waste rest

A method of manufacturing a sheet, including laying the raw mix according to claim 1 into a mold, compacting it and heating it, characterized in that the mixture is heated below the melting temperature of the binder, laid in a layer in the mold, a reinforcing mesh of high-strength filaments is laid on it, a second layer of raw material is applied mixtures are subjected to hot pressing above 140 ° C.

The essence of the invention is to replace the carcinogenic asbestos filler with environmentally friendly materials: mountain sand and blast furnace granulated slag, expensive scarce cementitious binder is replaced by household and industrial waste polyethylene. The present invention allows the disposal of industrial waste: blast furnace slag, mountain sand - waste iron ore, waste polyethylene. The manufacturing time for roofing sheets is reduced from 5 days to 3 hours. Bending strength increases from 1.6 to 24 MPa, frost resistance increases from 25 to 70 cycles. The introduction of reinforcing mesh sheets into the body significantly increases their strength. As reinforcement, steel grids or high-strength synthetic threads, for example, cord, are used, which are equivalent in tensile strength or exceed steel threads of the same diameter.

For the manufacture of sheets from the proposed raw material mixture, granulated blast furnace slag of Kuznetsk Metallurgical Plant OJSC with a grain size of 1-3 mm and 0-1 mm was used; mountain sand - waste from iron ore beneficiation at the Abagur concentration plant (Novokuznetsk); used polyethylene bottles as polyethylene. The prepared materials were washed and dried at 115 ° C. The mixtures were prepared according to the optimal compositions (table. Experiments 1, 2, 3.). The mixtures were mixed, heated to 120 ° C, laid in molds, layers were leveled, nets made of cord yarns were laid on them, and a second layer of the raw material mixture was laid. The mixture was hot pressed. The temperature during the pressing process was increased to 160 ° C. Pressing time was 15 minutes.

Made sheets of size 10 × 100 × 160 mm. The well-known method “Concretes. Methods for determining the strength. GOST 10180-90 ". Frost resistance was determined according to the methods of "GOST 10060-95. Concrete, methods for determining frost resistance. " After testing, visually did not detect kinks and cracks in the sheets. The test results (table) showed that the bending strength was 24 MPa, frost resistance - 70 cycles.

The present invention allows to utilize iron ore beneficiation waste (mountain sand), granular slag, household waste polyethylene and create a basis for the production of cheap building materials, in particular corrugated and flat sheets.

Information sources

1. Kropotov V.N., Zaitsev A.G., Skavronsky B.I. Construction Materials. M., B. Higher School, 1973, p. 210-219.

2. Islamkulova S.Kh. Roofing materials for the construction and repair of individual houses. M., Stroyizdat, 1992, p. 133.

Claims (2)

1. The raw material mixture for the manufacture of sheets, including a binder, aggregates, characterized in that as a binder contains household and industrial waste of polyethylene, as a filler contains blast furnace granulated slag with a grain size of 1-3 mm, blast furnace granular slag with a grain size of 0-1 mm., mountain sand - waste iron ore concentration in the following ratio of components, wt.%:
household and industrial waste polyethylene 25-30, granulated blast furnace slag 1-3 mm 25-30, granulated blast furnace slag 0-1 mm 15-20, mountain sand - iron ore dressing waste rest 2. A method of manufacturing a sheet, including laying the raw mix according to claim 1 into a mold, compacting it and heating it, the mixture is heated below the melting temperature of the binder, lay the layer in the mold, lay a reinforcing mesh of high-strength filaments on it, apply a second layer of the raw mix, subject hot pressing.