SU1726460A1 - Method of preparation of concrete mix - Google Patents

Abstract

The invention relates to methods for preparing concrete mixtures used in hydraulic engineering and road construction for the manufacture of products from highly mobile concretes and a rapid increase in early strength. The goal is to increase the homogeneity of the mixture, plasticity, water resistance, frost resistance and acceleration of hardening. The non-plastic portland cement 400 or 500 is mixed with mixing water in a turbulent mixer at a speed of 750 rpm for 0.25 minutes, a complex chemical additive is introduced — an aqueous solution of polymeric phenol, caustic sodium and sodium sulfate, respectively, in an amount of 0.1; 0.04; 2.0% and continue to mix for 0.5 minutes, and then activated into the host is introduced into the pre-mixed aggregates (sand and crushed stone) and combined for 1.0-1.5 minutes, or first prepared for the host by mixing the non-gypsum Portland cement 400 or 500 with mixing water and a complex chemical additive — water-soluble polymer VRP-1 and sodium sulfate in an amount of 0.05, respectively; 2.0% in a turbulent mixer at a speed of 750 rpm for 0.5–0.75 min, and then activated into the tenter is introduced into the pre-mixed aggregates (sand and crushed stone) and stirred for 1.0–0, 1 minute. 2 tab. cl

Description

The invention relates to construction, in particular, to methods for preparing concrete mixtures used in hydraulic engineering and road construction, for the manufacture of products of high-strength concrete and a rapid increase in early strength.

The purpose of the invention is to improve the homogeneity of the mixture, plasticity, water resistance, frost resistance and accelerated hardening.

Examples of implementation of the invention. Seri and.

As a complex chemical additive, an aqueous solution of polymer-phenol and sodium hydroxide is used in an amount of 0.1% by weight of cement, in which the ratio of polymeric phenol and sodium hydroxide is 1: 0.4, and sodium sulfate in an amount of 2% by weight of cement.

The method is carried out as follows.

A non-portless 400 or 500 grade Portland cement is mixed with mixing water in a turbulent mixer at a speed of 75 rpm for 0.25 minutes.

I

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A complex chemical additive is added to the same mixer and mixing is continued for 0.5 minutes at the same speed.

In parallel, in another mixer, the aggregates — sand and rubble — are mixed.

The resulting cement-aqueous suspension with the additive is introduced into the mixed aggregates and combined for 1.0-1.5 minutes.

Example 1a The concrete mix is prepared on the basis of Portland cement using a single-stage mixture preparation technique for 1.0-1.5 minutes.

Example 2a Concrete mixture is prepared on the basis of Portland cement according to a single-stage technology of preparation of the mixture with the introduction of QCD in the amount of: an aqueous solution of polymeric phenol and caustic soda 0.1% by weight of cement in terms of dry matter in a ratio of polymeric phenol and caustic soda 1: 0.4 and sodium sulfate ( N32S04) 1% by weight of cement.

Example Over. Portland cement-based concrete mix is prepared in Example 2, with the difference that the amount of sodium sulfate (NaaSO / i) is 2% by weight of cement.

Example 4a Portland cement-based concrete mix is prepared in Example 2 with the difference that the amount of sodium sulfate (NaaS04) is 2.5% by weight of cement.

Example 5a A concrete mix based on Portland cement is prepared by mixing cement with mixing water in a turbulent mixer at a speed of 320– 340 rpm for 0.5 min and then combining the cement mortar with pre-mixed aggregates (sand and crushed stone) for 1.0– 1.5 min

Example 6a The concrete mix is prepared by mixing portland cement with mixing water in a turbulent mixer at a speed of 750 rpm for 0.5 minutes and combined with pre-mixed aggregates for 1.0-1.5 minutes.

Example 7a The concrete mixture is prepared by mixing in a turbulent mixer of portland cement with water at a speed of 1500 rpm for 0.5 minutes, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 8a. The concrete mix is prepared on the basis of Portland cement in Example 6 with the difference that the mixing time in a turbulent mixer is 0.3 minutes.

Example 9a The concrete mix is prepared in Example 6 with the difference that

that the mixing time in the turbulent mixer is 0.75 minutes.

Example 10a The concrete mix is prepared in Example 6 with the difference that the mixing time in the turbulent

0 mixer is 1.0 min.

Example 11a The concrete mix is prepared in Example 6 with the difference that the mixing time in a turbulent mixer is 1.5 minutes.

5 Example 12a. The concrete mix is prepared according to Example 7 with the difference that mixing in a turbulent mixer takes about 0.3 minutes,

Example 13a The concrete mix is prepared according to Example 7 with the difference that mixing in a turbulent mixer takes place for 0.75 minutes.

Example 14a A concrete mix is prepared in Example 7 with the difference that

5 that mixing in a turbulent mixer is performed for 1.0 min.

Example 15a The concrete mixture is prepared in Example 7 with the difference that mixing in a turbulent mixture is carried out for 1.5 minutes.

Example 16a The concrete mixture is prepared by mixing in a turbulent mixer of portland cement with mixing water and complex chemical additives in an amount of: an aqueous solution of polymeric phenol and caustic soda 0.1% by weight of cement in terms of dry matter in a ratio of polymeric phenol and caustic soda 1: 0.4 and sodium sulphate 2% by weight

0 cement. Stir for 0.5-0.75 minutes at a speed of 750 rpm, and then combine with pre-mixed aggregates for 1.0-1.5 minutes.

Example 17a. The concrete mixture is prepared by mixing Portland cement with the mixing water in a turbulent mixer at a speed of 750 rpm for 0.25 minutes, a complex additive is introduced (as in Example 16) and stirring is continued for another 0.5 minutes and then activated injected into pre-mixed aggregates and combined for 1.0-1.5 minutes.

PRI me R 18a. The concrete mix is prepared using a single-stage mixing technology for 1.0-1.5 minutes of non-gypsum portland cement with mixing water and QCD in the amount of: an aqueous solution of polymeric phenol and caustic sodium 0.1% by weight of cement in terms of dry matter in a ratio of 1: 0.4 and sodium sulphate 2% by weight of cement.

Example 19a The concrete mix is prepared by mixing the gypsum-free portland cement with the mixing water in a turbulent mixer at a speed of 750 rpm for 0.25 minutes, QCD is introduced in the amount and ratio of Example 18 and mixing is continued for 0.5 minutes sandy aggregates (sand and crushed stone) for 1.0-1.5 minutes.

The results of the testing of concrete are given in table 1.

Seri b.

As a complex chemical additive, a water-soluble polymer (GRP-1) and sodium sulfate (No. 25 cm) are used, calculated on the dry matter, respectively, 0.05 and 2% by weight of cement.

The method is carried out as follows.

The non-fermented Portland cement of the 400 or 500 grade is mixed with the mixing water and the complex chemical additive in a turbulent mixer at a speed of 750 rpm for 0.5-0.75 minutes.

In parallel, in another mixer, the aggregates — sand and rubble — are mixed.

The resulting cement slurry with the additive is introduced into the mixed aggregates and combined for 1.0-1.5 minutes.

Example 16. Concrete mix is prepared on the basis of Portland cement using a single-stage technology for 1.0-1.5 minutes.

Example 26. A concrete mixture based on Portland cement is prepared in a turbulent mixer at a speed of 320-340 rpm for 0.5 minutes and then combining a cement-water slurry with pre-mixed aggregates (sand and crushed stone) for 1.0-1 ,5 minutes.

Example 36. A concrete mixture is prepared by mixing portland cement with mixing water in a turbulent mixer at a speed of 750 rpm for 0.5 minutes and combined with pre-mixed aggregates for 1.0-1.5 minutes.

Example 46. A concrete mixture is prepared by mixing in a turbulent mixer portland cement with water at a speed of 1500 rpm for 0.5 minutes, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 56. A concrete mixture based on portland cement is prepared by mixing it with mixing water in a turbulent mixer at a speed of 750 rpm for 0.3 minutes and then combining the resulting mixed with pre-mixed aggregates for 1.0-1.5 minutes .

Example 66. A concrete mix is prepared by mixing portland cement with water in a turbulent mixer for 0.75 minutes at a speed of 750 rpm, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 76. A concrete mix is prepared by mixing in a turbulent mixer portland cement with water at a speed of 750 rpm for 1.0 min, followed by combining with pre-mixed aggregates for 1.0-1.5 min.

Example 86. A concrete mixture is prepared by mixing in a turbulent mixer of portland cement with mixing water at a speed of 750 rpm for 1.5 minutes, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 96. A concrete mix is prepared by mixing portland cement with mixing water in a turbulent mixer at a speed of 1500 rpm for 0.3 minutes, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 106. A concrete mixture is prepared by mixing in a turbulent mixer portland cement with water at a speed of 1500 rpm for 0.75 minutes, followed by combining the binder with pre-mixed aggregates for 1.0-1.5 minutes.

Example 116. A concrete mix is produced by mixing portland cement with water in a turbulent mixer at a speed of 1500 rpm for 1.0 minute, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 126. A concrete mix is produced by mixing portland cement with water in a turbulent mixer at a speed of 1500 rpm for 1.5 minutes, followed by combining with pre-mixed aggregates for 1.0-1.5 minutes.

Example 136. A concrete mix is prepared on the basis of Portland cement using a single-stage technology with the introduction of

complex chemical additives (QCD) in an amount of: GRP-1 0.03% and NaaS04 1% by weight of cement, and mixing for 1.0-1.5 minutes.

Example 146. A concrete mixture is prepared using a single-stage technology for 1.0-1.5 minutes based on Portland cement with the introduction of QCD in the amount of: GRP-1 0.03% and N32S04 2% by weight of cement.

Example 156. A concrete mix based on Portland cement is prepared using a single-stage technology for 1.0-1.5 minutes with the introduction of QCD in the amount of: GRP-1 0.03% and N32504 2.5% by weight of cement.

Example 166. A concrete mix based on Portland cement is prepared using a single-stage technology for 1.0-1.5 minutes with the introduction of QCD in the amount of BPD-1 0.05% and Na2S04 1% by weight of cement.

Example 176. A concrete mix based on Portland cement is prepared using a single-stage technology for 1.0-1.5 minutes with the introduction of QCD in the amount of BPD-1 0.05% and N32S04 2% by weight of cement.

Example 186. A concrete mix based on Portland cement is prepared using a single-stage technology for 1.0-1.5 minutes with the introduction of QCD in the amount of BPD-1 0.05% and Na2S04 2.5% by weight of cement.

Example 196. A concrete mix based on Portland cement is prepared for 1.0-1.5 minutes using a single-stage technology with the introduction of QCD in the amount of BPF-1 0.075% and NaaSCM 1% by weight of cement. .

Example 206. A concrete mix based on Portland cement is prepared for 1.0-1.5 minutes using a single-stage technology with the introduction of QCD in the amount of: GRP-1 0.075% and Na2S04 2% by weight of cement.

Example 216. Portland cement concrete mix is prepared

within 1.0-1.5 minutes using a single-stage technology with the introduction of QCD in the amount of: VRP-1 0.075% and N32504 2.5% by weight of cement.

Example 226. A concrete mixture is prepared by mixing a non-plastics portland cement with mixing water and a complex chemical additive in an amount of: VRP-1 0.05% and N32504 2% by weight

cement in a turbulent mixer at a speed of 750 rpm for 0.5-0.75 minutes and then combining the resulting one with pre-mixed aggregates for 1.0-1.5 minutes.

The test results are presented in table 2.

Fo rumlula and z o bre n i Method of concrete mix preparation,

including receiving a slurry by mixing in a turbulent mixer Portland cement, water, complex chemical booster and mixing in a low-speed mixer of small and large

a filler within 1.0-1.5 minutes, the subsequent combination of a binder and a filler, characterized in that, in order to improve uniformity, ductility, water resistance, frost resistance and

hardening, as a result, is obtained by mixing cement, water in a turbulent mixer at a speed of 750 rpm for 0.25 min, then an additive is added and mixing is continued for 0.5 min; la, caustic sodium, sodium sulphate, which are injected in an amount of 0.1.0.04, 2.0% by weight of cement, respectively, or are prepared by mixing cement, water and additives in a turbulent mixer at a speed of 750 rpm within 0.5-0.75 minutes, while using zuyut soluble polymer

VPR-1, sodium sulphate, which is administered respectively in an amount of 0.05, 2.0 by weight of cement.

Concrete Test Results

Table 1

Claims (1)

Claim A method of preparing a concrete mixture, including obtaining a binder by mixing Portland cement, water, a complex chemical additive in a turbulent mixer and mixing fine and coarse aggregate in a low-speed mixer for 1.0-1.5 min, followed by combining the binder and aggregate, characterized in that, with In order to increase uniformity, ductility, water resistance, frost resistance and hardening acceleration, the binder is obtained by mixing cement, water in a turbulent mixer at a speed of 750 rpm in t 0.25 min, then the additive is introduced and stirring is continued for 0.5 min, while the additive is an aqueous polymerphenol solution, sodium hydroxide, sodium sulfate, which are respectively introduced in an amount of 0.1,0.04, 2.0 % by weight of cement or binder is obtained by mixing cement, water and additives in a turbulent mixer at a speed of 750 rpm for 0.5-0.75 minutes, while the additive is a water-soluble polymer VPR-1, sodium sulfate, which are introduced, respectively, in an amount of 0.05, 2.0 by weight of cement. 9 1726460 10 Concrete Test Results Example (series a) Concrete grade Cone draft, cm w / c The strength of concrete, MPa, aged, days. . Water resistant IN Frost resistance, MP3 | s 1' Τ '* I ²⁸ 1 300 9 0.43 6.1 14.2 17.6 21.3 29.9 4 200 2 300 8 0.43 9.2 15.4 • 19.3 24, h 30.6 6 250 3 300 8 0.43 10.1 19.6 23,2 27.5 33,2 6 250 A zoo 8 0.43 10.0 20,2 23.9 28.1 33.5 6 250 5 300 k 0.43 8.9 17.4 21.3 26.9 31.6 4 200 6 zoo 6 0.43 9,4 19.1 23,4 28,4 34.9 4 200 7 300 8 0.43 9.8 20.6 24.3 29.3 35.6 4 200 8 zoo 5 0.43 9.1 18.7 22.4 27.1 33.8 4 200 9 zoo 6 0.43 9.8 19,4 23,2 29.3 35,2 4 200 10 zoo • 7 0.43 10,2 20,2 24.9 29, 1 35,3 4 200 eleven • zoo 8 0.43 10.0 19.9 23.8 28.9 34.9 4 200 12 zoo 7 0.43 9.2 19.3 23.2. 27.9 34.0 4 200 thirteen zoo 8 0.43 9.9 20.9 24.8 29.7 35.9 b 200 14 zoo 9 0.43 10,2 20.9 25.1 30.1 35.8 4 200 fifteen zoo 10 0.43 10.3 21.1 24.9 30,2 35,4 4 200 16 zoo 14 0.43 11.2 21.3 25.3 30.8 35.9 .8 300 17 zoo 18 0.43 12.5 22.8 27.4 31,2 36.1 8 300 18 zoo 10 0.43 16.5 24.9 27.8 32.6 37,2 8 zoo 19 zoo 18 0.43 23,2 29.1 32.3 36.9 44.5 10 400 . Tab. Results of testing concrete from the indicated mixtures and age, days 14 J 28 1 zoo 2 2 zoo 4 3 zoo 6 4 zoo 8 5 zoo 5 6 zoo 6 7 300 7 8 zoo 8 9 zoo 7 10 zoo 8 eleven zoo 9 12 zoo 10 thirteen zoo. 3 14 zoo 3 fifteen zoo 3 16 zoo 4 17 300 4 18 zoo .4 19 zoo 6 20 zoo 6 21 zoo 6 22 zoo 4 23 zoo 7 0.43 6.1 14.2 17.4 0.43 8.9 0.43 9,4 19.1 0.43 9.8 20.6 0.43 9.1 18.7 0.43 9.8 19,4 0.43 10,2 20,2 0.43 10.0 19.9 0.43 9.2 19.3 0.43 9.9 20.9 0.43 10,2 20.9 0.43 10.3 21.1 16.8 0.43 7.2 0.43 7.9 17.4 0.43 8.0 17.6 0.43 7.8 17.5 0.43 8.1 18.1 0.43 8.3 18,4 0.43 7.9 17.4 0.43 8.3 18.6 0.43 8.4 18.5 0.43 16.9 23.8 0.43 23.5 28,2 17.6 23.1 29.9 21.3 26.9 31.6 23,4 28,4 34.9 24.3 29.3 35.6 .20.4 27.1 33.8 23,2 29.3 35,2 24.9 29.1 35,3 23.8 28.9 34.9 23,2 27.9 34.0 24.8 28.7 35.9 25.1 30.1 35.8 24.9 30,2 35,4 19.1 24.2 30.6 20.6 24.9 31,0 20.9 24.6 31,2 20.9 24.7  30.8 22.4 25.3 31.9 22.5 25.6 31.8 20.3 24.6 30.5 22.2 24.8 31,2 22.6 24.9 31,4 26.2 31.6 36,4 31,2 35.8 42,2