SU1357384A1 - Concrete mix - Google Patents

Abstract

The invention relates to the building materials industry and can be used in the manufacture of concrete and reinforced concrete products. The aim of the invention is to preserve the homogeneity of the mixture, prevent the appearance of efflorescence and efflorescence on the surface of the concrete, as well as prevent the formation of shrinkage cracks. Concrete mix includes. wt.%: Portland cement 10-26; placeholder 66-82; technical lignosulphonate (dry BeiueCTBo) 0.05-0.25; a compound from the group: copolymer of propylene oxide with glycerin at their ratio, respectively, 50 units of propylene oxide per 1 glycerol unit: copolymer of propylene oxide, ethylene oxide with glycerin, with their ratio, respectively, 85 units of propylene oxide, 8-9 units of ethylene oxide per 1 glycerol unit; copolymer of propylene oxide with 1,2-propylene glycol with a ratio of respectively 35 units of propylene oxide to 1 link 1,2 propylene glycol; a copolymer of propylene oxide with xylitol with a ratio of respectively 1 units of propylene oxide per 1 xylitol unit 0.0002-0.01; water the rest. The resulting concrete mix is characterized by uniformity during transport and molding, and the concrete from it is resistant to formation of waxes, efflorescences and cracks. 2 tab. a ® OO SL CO 00

Description

11357384

The invention relates to the manufacture of building materials and can be used in the manufacture of concrete and reinforced concrete products. ,

The purpose of the invention is to preserve the homogeneity of the mixture during transportation and molding, to prevent the appearance of efflorescence and efflorescence on the concrete surface, as well as to prevent the formation of shrinkage cracks.

Portland cement of grades 400 and 500, technical lignosulphonate 15 are used in the concrete mix offered.

25

thirty

2

Isothermal Exposure

Cooling down

6 2

The determination of the homogeneity of the concrete mixture is carried out in terms of the deviation of the coarse aggregate value:

no content by weight from average W; - Shsr

- -sch

CSR

where u. - the content of coarse aggregate in the sample mixture weighing 10 kg; the same, according to the dosage.

W and W. Wop (LST, products of alcoholic polymerization of polyatomic alcohols of the group of 1,2-propylene glycol, glycerin and xylitol with propylene oxide, known as Laprol brands L 3003 and L 5003-20 2B-10, L 2102, L 805..

The method of preparing a concrete mix is that the product based on propylene oxide (laprol) is added to years, emulsification is carried out using a gear pump of a rotary pulsation apparatus, hydroacoustic emitter or using other types of emulsifiers. The prepared emulsion is mixed with mixing water (taking into account the water of the emulsion). The mixing water with the additive introduced into it is introduced into a dry mixture containing Portland cement, granite crushed stone of a fraction of 5–20 mm and natural 35 quartz sand, while simultaneously mixing the resulting concrete mix for 3-5 minutes until achieving homogeneity. The prepared concrete mix is transported and discharged into a 40 bunker drive of a concrete spreader. Samples of the concrete mixture are taken from the concrete spreader to determine its performance and to make samples.

The value of uV is determined from ten measurements.

The determination of the formation of shrinkage cracks is carried out on a large-sized plate product with a base of 2x5 m. To do this, the concrete mix from the concrete distributor is fed into the mold and the product is molded on the vibrating plate.

Formed products enter into heat before heat treatment for 8 hours, at 20 ° C and relative humidity of 60%. Next, the product is subjected to heat treatment according to the decree of the gene mode. The formation of shrinkage cracks on the surface of the concrete is carried out visually by observing the surface of the concrete before and after heat treatment.

In Table 1, the composition of the concrete mixture and its properties, as well as the properties of the resulting concrete, are given.

Characteristics of the oligomeric molecules of various laprols are presented in table 2.

Claims (1)

Invention Formula Concrete mix, including porous concrete. Air entrapment, 45 cement, aggregate, technical the mobility of the concrete mixture, the strength of concrete in compression, vytsveto-vysoloobrazovanie. The preparation of samples — cubes 10x10x10 cm and specimens of beams 10x10x40 mm to determine the strength of concrete and bleaching and formation of sand is carried out by molding on a vibrating plate and subsequent heat treatment according to the mode, h: Pre-you. holding2 Temperature rise up to 80 ± 5 ° С3 Isothermal grip Cooling down The determination of the homogeneity of the concrete mixture is carried out in terms of the deviation of the coarse aggregate value: no content by weight from average W; - Shsr - -sch CSR where u. - the content of coarse aggregate in the sample mixture weighing 10 kg; the same, according to the dosage. SCH.Wop The value of uV is determined from ten measurements. The determination of the formation of shrinkage cracks is carried out on a large-sized plate product with a base of 2x5 m. To do this, the concrete mix from the concrete distributor is fed into the mold and the product is molded on the vibrating plate. Formed products enter into heat before heat treatment for 8 hours, at 20 ° C and relative humidity of 60%. Next, the product is subjected to heat treatment according to the decree of the gene mode. The formation of shrinkage cracks on the surface of the concrete is carried out visually by observing the surface of the concrete before and after heat treatment. In Table 1, the composition of the concrete mixture and its properties, as well as the properties of the resulting concrete, are given. Characteristics of the oligomeric molecules of various laprols are presented in table 2. Invention Formula A concrete mix, including port lignosulphonate, a product based on propylene oxide and water, characterized in that, in order to preserve the homogeneity of the mixture at the time of transport and molding, prevent staining and efflorescence on the concrete surface, and also prevent the formation of shrinkage cracks, it contains, as a product based on propylene oxide, a compound from the group: copolymer of propylene oxide with glycerin at a ratio of 50 units of propylene oxide per 1 unit of glycine, respectively. cerin: propylene oxide copolymer, i xylitol unit in the following ratio of concrete mix components, ethylene oxide with glycerin with their ratio, respectively, of 85 propylene oxide units, 8–9 ethylene oxide units per 1 glycerol unit; a copolymer of propylene oxide with 1, 2-propylene glycol at a ratio of respectively 35 units of propylene oxide per 1 unit 1,2-propylene glycol; copolymer of propylene oxide with xyumite at a ratio of respectively 11 units of propylene oxide per wt.%: Portland cement 10-26 Placeholder66-82 Technical lignosulfate (dry matter) 0.05-0.25 Product based propylene oxide 0.0002-0.01 WaterEverything .: r ptla dmemeit I-yoo with the content of its own cells Portland cement M-400 containing free pellets I 27 Portland cement M-500 with free alkali content 0.61 Psbep gram fractions 5-20 them Natural quartz sand years (calculated on dry matter) Products of alcoholic polymineral niogpatom cmipToB with propylene oxide:. the products of the interaction of glycerin and oxide oxides: Laprol 3003 Lallrsh 5003-2B-10 interaction products of I, 2-propnylene glycol With propylene oxide - lalrol 2t02 products of the interaction of xylitol with oxo propylene - lallrol 803 Water Diesel fuel Polyoxypropylen mixture. school esters of n-butyl alcohol - Propinol B-400 Air entrainment in concrete mix, " The mobility of the concrete mix, cm Concrete strength at compression at the age of 28 days, MPa 10,000 12,500 10,000 12,500 10,0000 17,0000 17,0000 17,0000 26,0000 26,0000 26.0000 - -52, 000 - 48.0000 50,000 52,000 -48.0000 48,00050,00052.0000 30,000 66,0000 24,0000 30,000 30,160 66,050224,250В 24,000729,98129,9998 65,9900 0.0155.0500 0.2500 0.100 - - - 0.25000.1000.1500 0.0500 0.01 0.0002 7.84 0,0008 0,001 7,9498 10,7492 7,399 7.84 0.0001 0.020 7.9498 10.7492 10.7492 7.399 7.8400 7.9498 0.0100 0.0002 0.0002 0.0100 1.1 0.7 24 16 39.1 57.2 1.2 26 43.5 0.8 21 46.4 I, 8 2.0 o 2.2 4.0 25 0.8 20 38.6 55.0 41.5 35.0 46.0 1,3 38,8 0.8 15 57.0 i link to wt.%: Portland cement 10-26 Placeholder66-82 Technical lignosulfate (dry matter) 0.05-0.25 Product based propylene oxide 0.0002-0.01 WaterEverything JT a b l and c a Known descend IliLinZI 12,500 10,0000 26,0000 52, 0000 29,9998 65,9900 0,1500 0,0500 17,0000 48,0000 23,9968 0,2SOO 0.0001 7.84 0.020 7.9498 10.7492 10.7492 7.399 7.8400 7.9498 0.0100 0.0002 0.0002 0.0100 I, 8 2.0 o 2.2 4.0 25 0.8 20 , 6 55.0 41.5 35.0 46.0 1,3 38,8 0.8 15 57.0 10.7492 0.0020 0,0020 .3 25 42,9 Composition of concrete demolition  Condlagasm concrete mix. JIQ-III The homogeneity of the concrete mix of transportation of nocrie s at the outlet of the concrete emulator in terms of the deviation rate of the content of a large slab 3003 3000 Laprol 5003-2B-105000 Laprol 2102 2100 Laprol 805 800 V The ratio of monomer units in oligomeric molecules is calculated based on the molecular weight and molecular structure data. Compiled by S.Voronin. Editor N. Bobkova Tehred M. Morgental Proofreader G. Reshetnik Order 5940/21 Circulation 588 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, unitary enterprise. Project, 4 at Continuing tAl.1, J ; 6 Control TLI.1. ten HieecTHan mixture iizin Table 2 50 propylene oxide units per glycerol unit 85 propylene oxide units for 8-9 ethylene oxide units for 1 glycerol unit 35 propylene oxide units per link I 1,2-propylene glycol 1 units of propylene oxide per 1 xylitol unit