SU834314A1 - Method of consolidating soils - Google Patents

Description

(54) METHOD OF SOIL STRENGTHENING

The hydromica mixture in the form of a suspension envelops soil particles, which gives it a temporary structural strength. The presence of alumino-phosphate leads to a decrease in the firing temperature with a simultaneous increase in structural and mechanical strength and durability. The use of a high-molecular-weight compound of a polysiloxane group as a water-repellent agent, for example, methyl polysiloxane, ethyl polysiloxane, isobutyl polysiloxane, gives waterproofed ground to waterproofed soil.

The technology of roasting soil on the proposed method is as follows. When using all three components of the composition for pretreatment of the soil in a solid form, from a hydromica mixture, high molecular weight compounds of the polysiloxane group, and an alkali phosphate, previously brought to a state of a powder with a specific surface of 450 O cm / g, a suspension in water is prepared from this powder. When using a poly-siloxane compound in the form of a liquid (water-repellent agent), a mixture is prepared separately in the form of a powder from a hydromica mixture and alumino-phosphate and an water-repellent emulsion in water, which are mixed prior to Sintering to form a suspension. With the prepared composition, the soil is impregnated, after which the soil is fired.

PRI me R. Samples in the form of a cylinder with a height and diameter of 5 mm are made from loess crayt with a natural moisture content of 10%, which are impregnated with the composition in the form of a suspension prepared from the powder components above in water,

This uses methylpolysiloxane as the high molecular weight poly-siloxane compound, and the hydromica mixture has a composition, wt.%: iO 55.3; ABaO, 5.0; Re.2.0z9,4; P eO 6.95;

 6.63; CaO 0.97; K, 0 5.24 and

 1O, 51. This composition is impregnated with samples of loess soil for 15 minutes. These samples are then fired in a muffle furnace in the following mode :, lifting

firing temperature up to a maximum value (750 ° C) - I h, isothermal exposure - 25 min.

Comparative data on the determination of the physicolanical characteristics of burnt soil with different contents of the components of the composition for pretreatment of the soil and in comparison with the known method (soil firing, p. Introduction to the burner flame of various

chemical additives) are presented in the table.

Claims (2)

The proposed method, as can be seen from the data of the table, reduces the energy consumption of burning by 25-30%, the strength of the soil increases by 1.5-2 times, the coefficient of water resistance increases by 5O-70%, the water saturation decreases by 28-41% compared to in a known way. Invention Formula The method of strengthening the soil by burning them with the simultaneous introduction. tempera turetting additives, characterized in that, in order to reduce the firing temperature, increase strength and water resistance, the soil is pretreated with a composition containing, wt.%: Hydromica mix35-50 High molecular weight compounds polysiloxanova groups of 0.3-1.8 A lumoborophosphate 2-18 Water Rest moreover, the hydromica mixture contains, weight 4: SiOi 55-56 5-6 ,, 8.5-1О Fbo 5-7 m 5-7 CaO O, 4-1 KAO 5-6 HflO 7-14.1 Sources of information taken into account in the examination I. Fastening and compaction of soil in construction. Materials | All-Union Conference, Kiev, 1974, p. 372376. 2. USSR author's certificate 95592, cl. E O2D 3/12, 1953. No