SU943263A1 - Composition for caulking joints - Google Patents

Description

The invention relates to adhesive sealants, namely, compositions for caulking seams in prefabricated shells. Known quick-set-up composition of the ECG beads tO inclusions Gypsum-alumina expanding cement Aluminous cement 20-23 ment 25-23 Portland cement 8-10 Asbestos Remaining Water This composition provides high strength, water-tightness and compaction of the seam by increasing the volume, but it is characterized by low deformability low resistance to dynamic load, which often causes depressurization of the seam. The closest to the proposed technical essence and the achieved result is the composition of C2, including,%: Aluminous cement River sand Lime Phenol formal 18 dehydrated resin Else However, this composition does not meet the requirements for materials for striking tunnel seams of tunnels, as its strength is not high (ultimate strength in compression after 28 days is equal to kg / cm, and its resistance to dynamic loads is low. The purpose of the invention is to increase the adhesive and cohesive strength and resistance to dynamic The target is achieved by the fact that the compound for caulking seams of prefabricated turns of tunnels, including alumina cement, mineral sticking, sand, thermosetting resin and water, as mineral sticking contains gypsum, and as a thermosetting resin epoxy resin and additionally contains hydroxyethylcellulose, an aminophenol hardener, a polyamide resin and a Maniha base in the following ratio of components May D: Aluminous cement2A-26 Gypsum 0.5-2.5 Epoxy diane resin 9.0-7.0 34 Oxyethylcellulose for 0, -Q, (Sand 50-52 Aminophenol hardener, 5-2.5 Polyamide resin 0.8-1, Base Manikha0-3-0.5 WaterOtheral Example. A joint compound for tunnel lining is prepared by mixing two initial mixtures. The first includes alumina cement M kOQ, gypsum, epoxy resin ED-16 and hydroxyethylcellulose. The second contains sand with a particle size of not more than 0.3 mm, an aminophenol hardener AF-2, PO-300 polyamide resin, a base of Maniha UE 606/2 and water. In tab. 1 shows the proposed structures for striking seams. - Table

In tab. 2 presents the results of determining the strength characteristics of known and proposed formulations ..

Linear change of prisms 31.5-31.5-100 mm,

-expansion of samples placed in water

. one hour from the beginning of the shutter at the age of 1 day

Flexural strength of samples 3.5-3.5 f-lOO mm, kg / cm through

1 day

3 days 28 days

Relative deformation

at stretching,%

Adhesion to concrete at

shear, kg / cm

Adhesion to concrete during shear after conducting dynamic tests, kgf / cm. Table. 2 indicate an increase in the adhesive strength of the composition, as well as an increase in its resistance to dynamic loads.

Table 2

0.18

0.19 0.20

38 31

10297

0.13 0.15

80

95

70

63

79

52

25

Claims (1)

Invention Formula The composition for the caulking of the seams of prefabricated tunnel lining, including clay7, earthy cement, mineral to cement, sand, thermosetting resin and water, characterized in that, in order to increase adhesion and cohesive strength and resistance to dynamic loads. it contains gypsum as a mineral binder, and epoxy diane resin as a thermosetting resin and additionally contains hydroxyethylcellulose, an aminophenol hardener, a polyamide resin, and a base Maniha in the following component ratio, May .: Aluminous ce-15 ment Gypsum 0 , 5-2.5 Epoxy resin Dianova 9,, 0 38 Hydroxyethylcellulose 0,, b Sand 50-52 Aminophenolic hardener, 5-2.5 Polyamide resin 0.8-l Base Maniha 0.3-0.5 Water Rest Sources information taken into account in the examination of i Compacted YUSH mixture SBUS). TU 35-869-78. M., 197h. 2 Loginov B.C. et al., Fast-hardening solution based on phenol-formaldehyde resins. - Building materials, 1963, No. 3 (prototype).