SU1169954A1 - Concrete mixture - Google Patents

Abstract

CONCRETE MIXTURE, including Portland cement, crushed stone, sand, polymer additive and water, characterized in that, in order to increase its plasticity and strength of concrete, it contains an emulsion based on piperylene oligomer with the following ratio of monotonic concentration, wt.% : Portland cement 16.9-25.1 Rubble 0.1-22.67 Sand44.3-67.52 Emulsion based on piperylene oligomer (for dry matter) 0.08-0.38 WaterEverything Else

Description

The invention relates to construction materials, in particular to the composition of concrete mixtures for thin-walled reinforced concrete structures, which meet the requirements for compressive and flexural strength. . A known concrete mixture is W, including, May. %: |. V Mineral per 15-50 Filler. 20-75 Aqueous disperse of o-methylstyrene copolymer with divinyl (dry) О, 1-5 Water ° Else However, concrete from this concrete mixture has relatively low strength, which prevents its use for the manufacture of thin-walled reinforced concrete structures. In addition, it is characterized by the complexity of the preparation of the additive. The closest to the technical essence and the achieved effect to the invention is concrete mixture 21, comprising, in wt.%: Portland cement 7.9-16.1 Crushed stone. 49.1-50.7 Sand25.9-34.4 Waste from ammonium fluoride production 0.47-0.49 Latex0.04-0.25 WaterEmerged However, the concrete from this mixture also has low strength, and the concrete mixture lacks mobility. The purpose of the invention is to increase the plasticity and strength of concrete. The goal is to achieve that a concrete mixture, including a port of land cement, crushed stone, sand, a polymer additive and water, contains an emulsion based on piperylene oligomer as a polymer, with the following ratio of components, May.%: 16.9-25, Portland cement 0 , 1-22,6 Rubble 44,3-67, Sand Emulsion based on piperylene oligomer (on dry basis) 0.08-0.3 Water Else Piperylene oligomer is a substance having a molecular weight of 500-5000, synthesized from piperien (a byproduct of petrochemical synthesis of isoprene) using The use of alkyl aluminum halides as a catalyst in the Sterlitamak Synthetic Rubber Plant. The emulsion was prepared by emulsifying piperylene oligomer in water in the presence of known emulsifiers (OP-7 substance is an alkylphenoxy ethoxylation product. GOST 8433-81 or rosin soap) in a ratio of (wt.%) 49 .: 49: 2. Concrete mix was prepared as follows. First, a dry mixture of cement and aggregates was dosed and mixed. An emulsion based on piperylene oligomer was introduced into this mixture with mixing water and stirred for another 2-3 minutes until a homogeneous mass. The concrete mix obtained in this way was laid in forms 150x150x150 mm and 160x40x40 mm in 6 cubes and prisms of each composition. Heat treatment was carried out according to the mode: 4 h - heat recovery, 3 h - temperature rise up to 80 С, 8 h - steaming at 80 С and 3.5 h - cooling in a closed chamber. After stripping, the samples were stored in the chamber. Portland cement M-500 of the Volkovysk plant, quartz sand M), 86 Zaslavl quarry, granite rubble of the 3-5 mm fraction of the Mikashevichesky plant, waste of aluminum fluoride production (for the prototype) of the Gomel chemical plant and Standard Latex SKS-65GP grade B The mobility of the concrete mixture was determined in accordance with GOST 1018176, and the strength of concrete for bending and compression (at the age of 28 days) - GOST 10180-78. Specific compositions of concrete mixes for testing, their mobility and strength of concrete are presented in the table.

five . 11699546

The results show that the mixture surpasses the known, well known, proposed concrete mixture with a compression strength of up to 45% and bending.

the same water / cement ratio is 65%.

possesses 2-3 times more plast- The proposed concrete mixture can

Compared with the mixture to be used in the manufacture of the prototype. Concrete of the proposed reinforced concrete structures.

Claims (1)

A CONCRETE MIXTURE, including Portland cement, crushed stone, sand, a polymer additive and water, is noteworthy because, in order to increase its ductility and concrete strength, it contains a May-based emulsion as a polymer additive. %: 16.9-25.1 0.1-22.67 44.3-67.52 piperylene oligomer in the following ratio of components, Portland cement Crushed stone Sand Piperylene oligomer emulsion (dry matter) Water 0.08-0.38 Rest