SU1255613A1 - Method of preparing concrete mix - Google Patents

Description

The invention relates to the technology of building production, in particular to the technology of manufacturing white-TOHHbtx mixtures on small and coarse aggregates.

The aim of the invention is to increase and decrease the consumption of cement.

Example. Portland cement M 500 is used as a binder, granite rubble as a coarse aggregate, limestone fraction 5–20 mm, sand with a modulus of 1.2.

The melting dust of the production of siliceous alloys is a fine powder of light gray color with a specific surface of 12000, with a bulk density of 250-350 kg / m, has the following chemical composition, wt.%:

75-97

1-A

0.10-0.66 3.8-8.9 3.0-6.5

Note. As filler use

granite rubble.

Crushed stone and water are fed into the concrete mixer, then pre-mixed cement is introduced with melting dust from the production of siliceous alloys in the ratio of 9-24: 1-5 and fine. placeholder

In tab. Tables 1 and 2 show examples of the preparation of a concrete mix at various ratios of cement and smelting production of siliceous alloys and its properties.

Hardening of concrete is carried out in natural air-wet conditions and during heat treatment with steaming according to the mode: rise to the maximum temperature for 3 hours, holding at 80-85 ° C for 6 hours, cooling to 22-25 ° C 7 hours.

The proposed method increases the strength of concrete with a simultaneous reduction in the consumption of a live.

Table 1

Note. As filler use

known to.

Editor N. Gunko

Compiled by G.Rakcheeva Tehred I.Popovich

Order 4784/28 Circulation 640 Subscription

VNSHSHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production-polygraph mexican enterprise, Uzhgorod, Projecto st., 4.

table 2

Proofreader E.Roshko

Claims (1)

METHOD FOR PREPARING A CONCRETE MIX, including preliminary mixing of cement with a silica-containing additive, followed by mixing with fine aggregate, water and coarse aggregate, characterized in that, in order to increase strength and reduce cement consumption, coarse aggregate is mixed with water first, then with a cement mixture and silica-containing additives - dust production of silicon alloys in a ratio of 9-24: 1-5 and fine aggregate. S ω