SU1110873A1 - Plugging mortar - Google Patents

Abstract

MOTOR SOLUTION, predominantly dp of an impervious screening device, includes bentonite clay, popiacrylamide and water, characterized in that it also contains boric acid and sodium silicate in the following ratio of components, in%: Bentonite 13-17 clay, to increase plastic strength 4-1.8 Poly acrylic acv1d 0.7-0.8 Boric acid 8 0.1-0.25 Sodium silicate Water Remaining

Description

x

The invention relates to the construction and can be used for the device of impervious curtains and diaphragms in the foundations of hydraulic structures. Known cement slurry comprising wt.%: 10-35 0.05-2.2 Sodium silicate Sodium salt carboxymethyl, 1-0.72 cellulose Elastic The closest to the invention by technical essence and achievable result is the cement slurry .% Bentonite clay 19.2-22.6 Papiacrylamide 0.2-0.3 Water Remaining A disadvantage of the known solutions is their low plastic strength. The aim of the invention is to increase the plastic strength of the solution. The aim is to ensure that the cement slurry, mainly for the device of the anti-filtration curtains, including bentonite clay, polyacrylamide and water, additionally contains boric acid and sodium silicate in the following ratio of wt.%: Bentonite 13-17 clay 1.4-1.8 Polyacrylamide 0.7-0.8 Boric acid 0.1-0.25 Sodium silicate Else Water When these components are mixed in a certain sequence, a mixture is obtained that has Increased plastic strength Technology for preparing the cement slurry is as follows. First, a mud solution with a density of I, 2 g / C is prepared, and sodium silicate with a density of 1.38 g / cm is introduced into this plant with mixing. After this, 4-5% aqueous boric acid plant is prepared, and polyacrylate amide is dissolved in it with stirring until the density of solution I is reached, 02-1.04 g / cm. The solutions thus obtained are drained together in a ratio: 4 parts of an alumina-silicate solution and I part of a solution of polyacrylamide in boric acid. The mixture is stirred for 5-10 minutes. Such a mixture acquires the optimum plastic strength after 20 minutes. In the practice of construction, these solutions in a ratio of 1: 4 by volume are fed separately by pumps for various communications into a trench or a hole in the ground. At the exit of communications, equipped, for example, with concentric ejecting nozzles, the two solutions are mixed and a cement mixture is formed, which immediately acquires elastic-viscous properties, then reaching the optimum plastic strength after -J5-20 minutes. Example. Bentonite clay from the Makharadzebsky deposit, sodium silicate with a density of 1.38 g / cm, polyacrylamide with an initial concentration of 10%, boric acid and water were used for testing the proposed solution. For this, a clay mortar with a density of 1.2 g / cm was prepared in a laboratory mixer, sodium silicate was added. Separately, a solution of polyacrylamide was prepared in a 5% aqueous solution of boric acid, the density of this solution was t, 04 g / cm. The first and second solutions were mixed in a ratio of 4: I, respectively, stirred for 10 min. After that, the plastic strength of the mixture was measured using a capillary plastometer. In parallel with this, the cement slurry was prepared using the prototype and its plastic strength was determined. Examples of the quantitative ratio of the components of the solution are presented in Table. 1, and the comparative results of the determination of strength in table. 2. Table 1 of I Predlagae 4 lth ProComponents, article of May. % i.LLjj Bentonito1315 17 20.8 wa clay Polyacryl1, 4 1.6 1.8 0.2 a14ID

J1110873

Continuation of table 1

table 2

Borna Kis0, 7 0.75 0.8 Lot

nat0, 1

0.17 0.25 FOR, 8 82.48 80.15 79

The density of the solution, g / cm3.14 G, 27 1.31 1.22

Plastic strength

i

HS / cm

42

27

nineteen

5Dables table. 2 show that

The plastic strength of the proposed solution is much higher than that of the prototype, which allows to reduce the thickness of the impervious curtain.

Claims (1)

TUMPING SOLUTION mainly for the installation of anti-filter curtains, including bentonite clay, polyacrylamide and water, characterized in that, in order to increase plastic strength, it additionally contains boric acid and sodium silicate in the following ratio, wt.%: Bentonite clay 13-17 Poly Acrylic Amad 1.4-1.8 Boric acid 0.7-0.8 Sodium silicate 0.1-0.25 Water Rest