SU1260351A1 - Raw mixture for producing light-weight concrete - Google Patents

Description

12

The invention relates to the field of building materials, in particular, to raw materials using complex additives for the production of lightweight concrete.

The purpose of the invention is to reduce the thermal conductivity and moisture coefficient of lightweight concrete.

To provide the required growth kinetics of plastic strength and durability of lightweight concrete from the proposed raw mix with reduced costs of the porous filler And the increased ash content of the TPP, it is necessary to introduce a hardening accelerator and a corrosion inhibitor.

Raw mix containing, wt.% Cement 18-20; large porous aggregate 35-40; ash TPP 23-25; air entrainment additive DLS 0.1-0.3; bakete cake accelerator

Saponified wood resin (air entraining up to durability (after 28 days),

kgf / cm 54 - 78. 102 76

Density (dry), YuOO 1130 990

soda NaAlOj 0.2-0.3; sodium nitrite corrosion inhibitor NaNO 0.3-0.4; water the rest is prepared as follows. Cement, expanded clay, thermal power plant ash and soda bauxite are fed into the mixer in a fine ground condition. Then, water is supplied with SDO and sodium nitrite dissolved in it. The duration of the mixture preparation is 3-5 minutes.

The compositions of the raw mix are given in table 1.

Physico-mechanical properties of concrete prepared from the raw mix of the proposed and known compositions are given in table 2.

Comparative thermal characteristics of claydite-concrete, mold. from raw materials mixtures of the proposed and known compositions when using evils of different quality, are given in table 3. Table

table 2

Volume of air entrained,%

Coefficient telprovod-liocTH, kcal / ml)

Frost resistance, cycles

Editor A, Ogar

Compiled by O. Motorina

Tehred I. Popovich Proofreader L. Patay

Order 5187/20 Circulation 640 Subscription

VNIIGSh of the USSR State Committee

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

Production and printing company, Uzhgorod, Projecto st., 4

Continued table. 2,

18.9 11.84.1

9.3

0.225 0.240 0.2850.335

100150200150

Table 3

Claims (1)

RAW MATERIAL MIXTURE FOR PRODUCTION OF LIGHT CONCRETE, including cement, coarse porous aggregate, TPP ash, air-entraining admixture ·. ku and water, different _; the fact that, in order to reduce the coefficient of thermal conductivity and humidity coefficient, it additionally contains sodium nitrite and sintered bauxite soda in the following ratio of components, wt.%: Cement 18-20 Large porous aggregate 35-40 Ash TPP 23-25 I attract air general supplement 0, 1-0.3 Sodium nitrite 0.2-0.3 Spec bauxite co dy 0.3-0.4 Water Rest N5 05 O With