SU1203068A1 - Raw mixture for producing cellular concrete - Google Patents

Description

The invention relates to building materials, and more specifically to mixtures for preparing cellular concrete of natural hardening, used for monolithing butt joints of building structures in the winter period.

The purpose of the invention is to increase the strength of cellular concrete under conditions of negative temperature, water resistance, prevention of efflorescence on the surface of concrete and corrosion of the armature.

The introduction of an active mineral additive in the amount of; 8-14 wt.% (Slag dust) into the composition of the raw mix allows to obtain a finely porous structure of cement stone, which improves the cellular properties of frost resistance and water impermeability,

Adding a plasticizer, adipic alkaline ESP, creates conditions for the porisation process and accelerates the process of hardening cellular concrete at negative temperatures, without causing a corrosive effect on the embedded parts in the structures.

Vse amen quartz sand bulk bulk density in the range of 1500

Portland Cement Aluminum Powder

Soap emulsion

Potash Molasses Sand River

Slag sand porous

Slag dust

20-4027,4030,40 39,5030,40

0.01-0.060.0220.025 0.0320.025

0.01-0.06 1-6

0,015-0,1 Else

0.01

0.015 0.02

0.015

52.80 44.0 39.60 44.0 14.0 10.0 8.0 10.0

1660 km / m using porous slag sand bulk bulk mael

qoi in the range of 1.000-1200 km / m, which improves the thermal performance of cellular concrete and improves its structural quality.

The proposed concrete mix is prepared as follows.

Into a forced action mixer, dosed quantities of dry constituents are loaded in the following sequence: slag sand, slag paste and portland cement. The whole mixture is stirred in a dry state for 1-1.5 minutes, a water solution of adipic alkaline plasticizer is added and the mixture is stirred for 2-2.5 minutes, then the required amount of sodium sulfate and aluminum powder is added (carefully placed in soap emulsion in the ratio of 1:10 - household soap and water) and, if necessary, the residual amount of water to the desired moving mixture. The whole mixture is stirred for an additional 2-3 minutes.

B Table 1 presents the compositions of the known and proposed cellular concrete; in tab. 2 - test results of cellular concrete.

Table 1

0.01

0.015 0.02

0.015

52.80 44.0 39.60 44.0 14.0 10.0 8.0 10.0

Bulk mass of the mixture (density), kg / m

2060

Bulk volume of blend (density) after porisation at, kg / m

The strength of concrete after 7 days (samples kept at -15 ° C), MPA

Strength of concrete at the age of 28 days (7 days at -15 С, then in normal conditions), MPa

Frost resistance, cycles

Water Resistant

Editor N. Gunko

Order 8382/29 Circulation 604 Subscription

VNIIPI USSR State Committee

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

Filial PS Patent, g, Uzhgorod, st. Design, .4

Continuation of table 1

1690

1870. 2020

1870

14AO

1530 1770

1530

3.2

3.9

4.6

3.9

10.0 11.8 100 100

AT 2

AT 2

O. Motorina

oh Proofreader S.

10.0 100

B-2 Shekmar

Claims (1)

RAW MATERIAL MIXTURE FOR PREPARATION OF CELLULAR CONCRETE, including Portland cement, fine aggregate, aluminum powder, soap emulsion, water and additives, characterized in that, in order to increase strength at low temperatures, water resistance, frost resistance, it contains porous slag sand as a fine aggregate, as additives - an adipic alkaline plasticizer PASCH-1, sodium sulfate and additionally slag dust with the following ratios of components, Portland cement Porous slag sand Aluminum Vai powder Soap emulsion Adipic alkaline plasticizer PASCH-1 (dry product) Sodium sulfate Slag dust Water wt.%: 27.40-39.50 39.60-52.80 0.022-0.032 0.01-0.02 0.009-0.013 • 0.18-0.26 8-14 Else with SU „„ 1203068