SU1303667A1 - Method of consolidating soil - Google Patents

Abstract

The invention relates to the field of construction and can be used to strengthen sandy soils in the construction of roads. The purpose of the invention is to increase the strength of the fortified soil. The method of strengthening the soil consists in successively applying to the soil surface a plasticizing composition, and then a composition containing 6–12 wt.% Acetone-formaldehyde resin, 0.6–1.2 wt.% Caustic soda, 4.0–8.0 wt. .% styrene latex, 0.01–0.02 wt.% methylcellulose and the rest is water. The plasticizer solution contains 0.005-0.01% by weight of ethoxylated alkyl phenol, 0.4-0.8% by weight of caustic soda and the rest is water. Durability of the strengthened soil when forcing a pestle 0,52-0,55 MPa. 2 tab. Ш (Л со о 00 05 сг:

Description

The invention relates to the construction and can be used to strengthen sandy soils in the construction of roads.

The aim of the invention is to increase the strength of the fortified soil.

The method is carried out as follows.

On the surface of the sandy soil, by irrigation, it is applied first with a plasticized solution, including oxyethyl alkylphenol, caustic nat and water, and then after 10-15 minutes a second solution, including acetone-formaldehyde resin, divinylstyrene lactax5 methylcellulose, caustic and water. It is foreseen that in the first solution 2/5 of the total amount of the catalyst is contained, and in the second 3/5. In sum, an excess amount of catalyst is obtained, which leads to a sharp increase in the rate of curing of the resin, but what is happening already in the pores of the soil, And this leads to an accelerated collection of soil strength and soil strength.

The first solution performs the role of a wetting agent, compacts the soil and creates its structure with a uniform distribution of pores in the soil volume; the second solution provides the complex of necessary properties of the reinforced soil.

.

0,005

0,0075

0.01

0.4 0.6 0.6 0.9 0.8 1.2

g

 O - 5 20

25

thirty

The ethoxylated alkylphenol (OP-10) and methylcellulose play the role of a dispersant and emulsifier, ensuring the compaction of the soil, the achievement of uniformity and stability of the solutions. The resin serves as the main polymer in the holding, and the latex acts as a plasticizer and noBMDjaeT elasticity of the hardened soil.

Preparing several formulations of solutions, which the proposed method was treated soil. For this, the following components were used, Aceton-formaldehyde resin of the ACF-3M brand, ethoxylated alkylphenol () according to GOST 8433-81, synthetic divinyl-styrene latex SKS-65, caustic soda according to GOST 4328-66, methyl cellulose according to TU 6-01-717- 72, while OP-10 and methylcellulose were introduced into the mixture in the form of a 1% stock solution.

The prepared compositions fixed the sand by impregnating it first with the first solution, and after 10 minutes with the second, at a flow rate of each solution of 2 l / m of the surface of the reinforced soil (sand fractions not more than 0.65 mm).

The compositions of the solutions are presented in table 1, and the properties of the fortified or sandy soil in table 2.

Table 1

2

4 0.1

6 0,015

0.02

99,595

89.30

99.3925

84,085

99.19

78.78

0, 52 0.54 0.55

14.1 11.2 8.0

impregnation with

50

Depth of impregnation

(after 6 h), cm 3.0 2.7

The duration of the set of strength, h

Water resistance (weight loss during extraction in the Soxhlet apparatus within 24 hours)

cure The deformability was determined by changing the geometrical dimensions of the sample of the fortified soil with a load equal to 50% of the breaking strength during compression compared to the original sizes of 3.

Claims (1)

Invention Formula A method of strengthening the soil, which includes sequential treatment of the soil with a solution of acetone-formaldehyde resin, caustic soda and water and a plasticizing solution, characterized in that, in order to increase the strength of the strengthened soil, the latter is first treated with a plasticizing solution containing, by weight,%: Oxidized Alkylphenol 0.005-0.01 VNIIPI Order 1282/31 Production polygr, pr-tie, g, Uzhgorod, st. Project, 4 T a b l n c a 2 0.55 8.0 60 2.5 56 0.38 7.5 75 1.5 72 All samples are not more than 10 wt.% Caustic soda O, 4-0, 8 Water and after treatment, it is treated with a solution containing, in wt.%: Acetone formaldehyde resin6-12 Caustic soda 0.6-1.2 Divinylstyrene latex4.0-8.0 Methtcellulose 0,01-0,12 Water Rest Circulation 607 Subscription