SU1231029A1 - Binder for concrete and mortar mixes - Google Patents

Description

The invention relates to building materials and can be used to prepare mortar and concrete mixtures.

The purpose of the invention is to increase frost resistance and concrete strength of normal hardening, as well as to reduce cement consumption.

A concrete mix is prepared that includes the following materials: cement M400, coarse aggregate — granite crushed stone of fraction 5–10 and fractions 10–20 mm fine aggregate — river sand with a particle size of 1.5, sodium thiosulfate, and calcium chloride,

After mixing, the concrete mixture is molded into 10x10x10 cm cube samples to determine compressive strength and frost resistance, as well as cylinders (15 cm in diameter) for determining the water tightness and JBO absorption. Samples vibrate on

Oenvct t7.St t7, "17.07 17.25 17.16 6.90 16.81 t7.5 i6.63 15.76 14.86 14.0 17.5 (99.5) (99.0) (97.0 ) (98.0) (97.5) (96.0) (95.5)

Great ..

asho-. .

50 50 50 5Q 505050 50, 50 50. 50 50 5050

Mklkny.

zvpoliatal. 22.7 22.8 23.01 22.91 22.96 23.10 23.15 22.94 23.85 25.20 26.58 27.92. 22.50

Thiosulfate .0.04 0.088 0.44 0.088 0.264 0.44 0.493- 0.264 0.264 0264 0.264 0.106 yatri (9.25) JO, 5) (2.5) (0.5) (1.5) (2.5 ) (2.8) (1.5) (1.5) (1.5) (1.5) (0.5)

Hporsch.

Kil - 0.044 0.088 Oj088 0.264 0.176 0.264 0.299 -0.176 0.176 0.176 0.176 tk (0.25) (0.5) (0.5) (1.5) (1.0) (1.5) (1.5) (1.7) (1.0) (1.0) (1.0) (1.0)

 Sulfate-sodium Hlorcp- - wrtrt

Water9.632 9.584 9.392 9.488 9.44 9.30 9.28 9.56 9.08 8.60 8.12 7.64 9.56

D and to check and e, In parentheses, the amount of additive by weight of cement.

vibroplatform according to standard methods and cured under normal conditions.

At the same time, concrete samples with the addition of the prototype and control samples without additives are prepared. The relationship between the components of the prototype additive is assumed to be equal to their average value in the claims.

Strength tests - in compression; conduct according to GOST 10180-78, water absorption r according to GOST 12730.3-78, water resistance - according to GOST 12730.5-78. Frost resistance is determined after 100 cycles of alternate freezing and thawing according to GOST 10060-76.

To confirm the proposed boundary values for the consumption of the additive (upper and lower limits), concrete mixes with foreign quantities of the additive are tested, 5% by weight of cement or from 0.088 to 0.792% by weight of concrete mix (compounds 1 and 7) ..

.Tavlipz 1

0.211 (1.2)

0.123 (0.7)

312310294

In tab. Table 1 shows the concrete tops) injected in an amount, the minimum composition of concrete mixes with the boundary number for the proposed living agent (2.5% and the average consumption of components added by weight of cement). ki (in parentheses are the number of water-cement ratio for all additives by weight of cement). Composition 8 5 concrete mixes are accepted (without additives) is a control, compositions 9-12 have a reduced consumption of cement. Additive consisting of 13 (0.55 serum.

The test results are presented in 2 ..

Order 2519/28

Circulation 640

VNIIPI USSR State Committee

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

: Production and printing company, Uzhgorod, st. Project, 4

Totip) is introduced in a quantity that goes to the minimum for the proposed one (2.5% of the cement mass). The water / cement ratio for all concrete mixes is taken

equal to 0.55.

The test results are presented in 2 ..

Table 2

Subscription

Claims (1)

BINDER FOR CONCRETE AND GROWTH OF MIXTURES, including cement, sodium thiosulfate and chloride, characterized in that, in order to increase frost resistance, strength of concrete of normal hardening, and also reduce cement consumption, it contains calcium chloride as the following components, wt.%: Cement Sodium Thiosulfate Calcium Chloride Ratio 96.0-99.0 0.5-2.5 0.5-1.5>