SU1691355A1 - Method of producing steel fibre concrete - Google Patents

Abstract

The invention relates to building materials. The purpose of the inventions is to simplify the preparation technology and increase the strength of the steel fiber. Into a working turbulent mixer, the dosed components are introduced at the rate of the required quantity per batch in the following sequence: quench water, for which electrolytic cation exchanger water with a pH of 12-13 at 80-85 ° C, steel fibers prepared from waste ropes coated with grease from fatty acids, sand - 50-60% of the total. Stirring is carried out for 5 minutes, after which the cement, the rest of the sand is injected and stirred until the concrete mix is completely ready. When exposed to a lubricant from fatty acids with hot water-sandy mixture, the lubricant goes into the liquid phase and, interacting with electrolytic cationic water, hydrolyzes. The presence of sand intensifies the degreasing process. Saponification products, dissolved in cationic water, act on the concrete mixture as a plasticizer, which reduces the water demand for mixture i and increases the strength of steel fiber concrete. 3 tab. Yo

Description

The invention relates to building materials and can be used for the production of building structures and products.

The aim of the invention is to simplify the preparation technology and increase the strength.

Example. For the preparation of steel fiber concrete, Portland M500, quartz sand, steel fibers, coated with grease from fatty acids, with a diameter of 0.8 mm and a length of 40-50 mm, and electrolysis cationic water with ionization with pH 12-13 at t - 80-85 ° are used. WITH. For fibers, a used rope with a diameter of 5.5 mm is used.

(GOST 3064-80) with a tensile strength of wire 1372 MPa. Kationitny water is prepared in the electrolyzer from an aqueous solution of sodium chloride (hammer stone salt GOST 13830-84 containing 10 g / l).

The studies were carried out on the compositions of steel-fiber concrete given in Table 1.

Into a working turbulent mixer of forced action, the injected components are introduced at the rate of the required quantity per mixture of the mixture in the following sequence, wt.%: Ground water 11 (as ketoic acid)

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ate

electrolyzed cationic water with a pH of 12-13 at 85 ° C), 5X steel fibers (from spent ropes, covered with a lubricant based on fatty acids), 34 silica quartz sand (60% of the total for mixing). Mixing is carried out for 5 minutes, then 27% by weight cement is introduced into the working mixer, the rest of the sand (23% by weight) is stirred for 2 minutes. The finished steel fiber concrete mixture is filled in forms, vibrated for 40 seconds and heat treated. in a boiling chamber at 80 ° C for 8 h.

The test results are presented in Table 2-3.

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Claims (1)

The invention The method of preparation of steel fiber concrete, which includes mixing of gate water, cement, sand and steel fibers in a turbulent mixer, molding and moisture treatment, characterized in that, in order to simplify the technology of preparation and increase strength, first mixing within 5 minutes of mixing water with a pH of 12-13 and t - -80-85 ° C. steel fibers from waste ropes, coated with grease from fatty acids and 50-60% of sand of its total amount, after which cement and the rest of sand are introduced. Table 1 5 1691355 6 1.8 .§....g.l. Composites 1 Content of components in examples, LAS, with the initial introduction of sand of the total mass | ............ - ......-..-. ----. -. - .............-. -.... "-----" - 4 - I b : GT SЈGDOG; Y Cement 27 27 V 27 27 V 27 27 27 27 27 27 27 Z7 27 17 27 steel fibers and used wire rope: diameter 0.8 ml, length 40 per cent of reinforcement This zh - - - - -: -::: 5 s55: 7777 - - diameter I them, length 50 them, the percentage of reinforcement Ззз - - - - - з - 5 ::::; ::::; ::::, Quartz sand 59 57 55 59 57 55 59 57 55 59 57 55 59 57 55 59 57 55 water electrolysis cationite at 80-85 ° С ph, 0 - - 11 - - 11 11 (I). -) - (M) 12-11 - And - - II - - - And 13II - - n - - - - And - - And - - „..111 In examples 9, 12, 15, 18, the use of both water with a pH of 10 (the amount of water is given in parentheses) and with a pH of 13 is used. Table 3 Strength at dilation at. Ipa. An odor gate with a pH of 10 - - 8.2 - - 8 11 - (12.1) 11.2 - (12.3) 11.I - {13.DH.1 - (12.3) 121010.5 - - 13, L - - 19.6 - - 18.5 - - 19.1 1310, 1 - - Yu.Z -23.6 - - 22.8 - - 21i, 5 - - ..... .  Examples S, 12, 15, and 18 were used with both pH 10 and pH 13 water; the strength of the samples of examples on water with a pH of 10 is shown in parentheses.