RU2001082C1 - Hydroinsulating mastics - Google Patents

Abstract

Use with a roof waterproofing device The essence of mastic contains butyl rubber 16–24% bitumen 10–14%. transformer oil 2-6% isolin 12 - 20% mzganese dioxide 1.0 - 18% paraquinone dioxime 1.0 - 1.8% diamine-dioleate 0.5 - 1.5% organic solvent residual Pre-crushed and plasticized butyl rubber is placed in an organic Znchschiy solvent, add bitumen, harden and kaolin and mix at room temperature to a homogeneous mass Characteristic properties d absorption in 24 hours 0.3 - 0.5% water impermeability under pressure, MPa in 10 minutes 2 tab

Description

The invention relates to building materials and can be used for waterproofing roofs of industrial and civil facilities, waterproofing bridges and anti-filter screens at landfills.

A waterproofing composition is known including butyl rubber. bitumen, parachinondioxyme, manganese oxide, cement, asbestos and an organic solvent.

However, this composition has increased toxicity due to the high solvent content. The waterproofing layer is formed within 10-12 days. which leads to a significant technological break in the construction work.

Closest to the invention is a waterproofing mastic composition comprising bitumen, butyl rubber, paraquinone dioxime (PCDO), manganese dioxide, kaolin and an organic solvent.

The disadvantage of the prototype is manifested in

high volatile toxic content

solvent (up to 70-80%), considerable laboriousness of work with repeated unsurfacing of individual roof layers in the case of the formation of a waterproofing carpet with a calculated thickness. During the evaporation of the solvent, a large number of micropores are formed. which ultimately leads to an increase in the water absorption coefficient of the mastic.

However, a decrease in the solvent in this composition can lead to a significant increase in the viscosity of the system, which sharply worsens the technological characteristics, workability of the mastic, and the possibility of applying the mastic to the roof by a mechanized method is also excluded.

An object of the invention is to reduce the water absorption of mastic and the complexity of the work when forming a waterproofing carpet, simplifying the method of masonry / masonry, reducing the consumption of toxic solvents

This object is achieved in that the waterproofing mastic, including bitumen, butyl rubber, paraquinone dioxide, manganese dioxide, kaolin, a plasticizer and an organic solvent, contains a surfactant as an plasticizer - octadecyl trimethyldiamine dioleate - (diamine dioleate) in the following components, wt.%

Butyl rubber 16-24

Bitumen 10 14

Transformer

5

YU

fifteen

0

5

0

fifty

5

0 5

oil 2-6

Kaolin 12-20

Manganese (IV) dioxide 1.0-1.8 Paraquinondioxime 1.0-1.8

Diamine dioleate 0.5-1.5

Organic

solvent

The authors are not aware of the introduction of a plasticizing agent, diamine dioleate and kaolin, which can significantly improve the concentration of the mastic and its properties, preserve the necessary viscosity of the system, and improve the technological characteristics that provide a mechanized method for constructing a single-layer waterproofing carpet.

An example of the preparation of mastic. The pre-ground and plasticized butyl rubber is placed in an organic solvent, bitumen, hardener and kaolin are added. The cooking process is carried out at room temperature with thorough mixing of the components to a homogeneous mass. The formulations of the investigated mastic compositions are given in table. 1. in the table. 2 shows the results of testing their properties.

As an organic solvent, you can use both xylene, toluene, gasoline, and Nefras S-3-80 / 120, Nefras S-2-80-120

The studied compositions of waterproofing mastic have a heat resistance index of at least 130 ° C for 5 hours.

The weather resistance was tested according to a conventional method by testing in a climatological chamber.

The weather resistance test cycle was:

17 h - ultraviolet irradiation at + 65 ° C;

3h - sprinkling at room temperature:

4h - exposure to negative temperature (-20 ± 2 ° C).

The total number of cycles is 142, which corresponds to the operation of the material in kind for 12 years.

As can be seen from the table. 2. the use of transformer oil and diamine dioleate as a plasticizer within the specified limits allows maintaining the effective viscosity of the system in the range of 280-600 Pa, which is sufficient to use a mechanized method of feeding and roofing carpet.

Reducing the solvent in comparison with the known mastics 1.5-2 times reduces the micropore content in the waterproofing carpet and, accordingly,

water absorption rate. After vulcanization, the mastic has a high rate of water resistance.

The viscosity of the composition and the optimally selected composition of the mastic allow us to form a single-layer waterproofing coating of a given thickness, which also contributes to a reduction in the laboriousness of roofing works, and a decrease in the proportion of toxic solvent improves the ecology in the production area.

The base for the waterproofing layer of mastic can serve as prefabricated

slabs, cement-sand screed, asphalt concrete, metal, wood, etc.

Cold waterproofing mastic can be applied at temperatures from +60 to -25 ° C.

(56) Copyright certificate of the USSR M 424869.cl. C 08 L 95/00. 1973.

TU 21-27-39-77 Mastic of bitumen-butyl rubber (cold) for the installation of a Beerulon roof and waterproofing. M .: Venta, 1978.i

Table 1

table 2

Formulation of the invention IDGP; ZOLOSIONAL MASTIC, including bitumen, Sugilkauchuk, kaolin, manganese dioxide, parachinochioxide, a plasticizer and an organic solvent, characterized in that the mastic contains transformer oil as a plasticizer and additionally diamine dioleate in the following ratio of components,

wt.%:

Butyl rubber 16-24

Bitumen 10-14

Transformer oil 2-6

Kaolin 12-20

Manganese Dioxide 1.0 - 1.8

Paraquinondioxime 1.0-1.8

Diamine dioleate 0.5-1.5

Organic solvent