SU1541197A1 - Method of producing concrete mix - Google Patents

Abstract

The invention relates to the technology of building production and can be used in the preparation of concrete mixtures. The goal is to increase the mobility of the concrete mix and the strength of concrete. The fly ash is treated with a 1-2% aqueous solution of C-4 superplasticizer (Dophen) in an amount of 0.6-1.0% of the ash mass by grinding to S _beats = 6000-8000 cm ² / g. Fine and coarse aggregates, cement, activated ash and water are fed into the concrete mixer. The ratio of cement: fly ash is 1: 0.6 to 1.2. 4 tab.

Description

The invention relates to the technology of building production, in particular, to the technology of making concrete mixes on small and coarse aggregates.

The goal is to increase the mobility of the concrete mix and the strength of the concrete.

Portland cement M 400 is used as a binder, coarse aggregate - crushed stone of fraction 5-10 mm, sand with a grain size module, 9, superplasticizer C-4 (Dophene).

Fly ash with a specific surface to grind 3795 cm / g has the following composition, wt.%: SiO 54.8; , AlgO, 23.8; RegO + Fe20, 13.8; MgO 1.9; CaO 5.0; S0 0.5; CgO + Na20 0.2.

The fly ash is processed by domol it with a 1-2% C-4 aqueous solution in an amount of 0.6-1.0% by weight of the ash. After grinding, the specific surface is 6235 cmg / g.

C-4 (Dophen) - a product of oligomeric type based on naphthalene sulfonic acids and its derivatives, contains,%: water 55.5; ash 36.0; active substance 55.3; sodium sulfate is 17.3, the pH of a 2.5% aqueous solution is 8.7.

Fine and coarse aggregate, cement, activated ash and water are fed into the concrete mixer.

The test results are presented in table.1-4.

Claims (1)

Invention Formula The method of preparing a concrete mix by treating fly ash with an aqueous solution of a plasticizing additive, followed by mixing with cement and aggregate, is different because, in order to increase the mobility of the concrete mix and the strength of the concrete, fly ash is processed by cl Ј 0 one 3 1541197l dOmol to a specific surface of 6000- 0.6-1.0% by weight of ash, with 8000 cm2 / g with a 1-2% aqueous solution — the ratio of cement: fly ash in the amount of superplasticizer is 1 :( 0.6-1.2). Components, fine-grained nets The content of the component .nes. "D., Part proposed IIILlIIIinZIZIZZZinZIII Sand Aola hammer with C-4 additive and specific surface area: 6000 7000 8000 Fly ash specific surface area 4100 6000 7000 8000 The consumption of suiperppsti-fixer, X from the mass of ash 2.4 2.4 2.4 2.2 2.2 2.2 2.0 2.0 2.0 2.4 2.4 2.4 2.4 2.4 0.6 0.9 12 0.6 0.9 1.2 0.9 1.2 0.6 0.6 0.6 0.6 0.8 1.0 0.6 0.8 1.0 0.6 0.8 1.0 0.8 0.8 0.8 I .6 , 0 The components are small-. spiny concretes The content of components, mas.ed., in the composition known I control . Ti8 L 12о 2 | T 12 C 2 T T 2 T T 2c Sand Hammer ash with do-Pavka C-4 and specific surface area: 6000 7000 8000 Fly ash specific surface area: 4100 6000 7000 8000 Superplasticizer consumption X on mas2 2 2-2 2-2 2,0 2.0 2.0 2.0 2.4 2.4 2.4 2.4 2.2 2.2 2.2 I .2 0.6 0.9 0.9 1.2 0.6 0.9 0.9 1.2 0.6 0.9 0.9 1.2 0.6 0.6 0.8 I, 0 0.8 0.6 0.8 I, 0 II p and units .. subs 0.45. I The proposed method T a in l and {in I 14 2.2 1.2 1.2 0.6 0.6 0.6 0.8 I 0.9 .6 , 0 0.8 Continuation of table 1 0.6 0.9 0.6 0.9 1.2 0.6 0.9 1.2 0.6 Known method 1: 0.9 (hammer) Continuation of table 2 T a Known composition of O 2 Control composition 39.2 The proposed composition 0.9 Known composition O1065.03 Control composition Table 4 38.4 154119710 Continuation of table 4