SU572062A1 - Binder for road and airfield pavements - Google Patents

Description

Invented: er refers to the construction and operation of roads. It can be used in the installation of base coatings and dust removal of automobile threshold,

A great amount of organic matter is used in off-road construction, including S. antiseum resins. However, the mineral materials reinforced by them have low strength properties and water resistance: they reach strengths up to 30 kg / cm after 5 years.

Investigated in the shale based on shale tar with various hardening accelerators. Of these, formaldehyde has the most active effect on the process of formation of high-molecular compounds.

However, they all have the following disadvantages:

a) a set of other reinforced mineral material occurs slowly over 3-4 months;

b) low strength and water resistance of hardened mineral materials - 17 kg / cm I

Formaldehyde (used in the form of a solution in water) is a highly toxic substance, preprocessor type: working on building roads and airfields with personal protective equipment, and hydrochloric acid is a highly corrosive and dangerous working agent. All this complicates the technology of road construction and reduces labor productivity.

A coating based on shale oil and furfural with the addition of G21 thionol is known. Road surfaces based on this composition have insufficient strength properties.

The purpose of the invention is to increase the ripoi coatings. The goal was achieved by adding g-yuchrnine as an amine to the binder, including cleansing resin and i-furfural, and taking (JrJ) as

sul) at iron oxide. The choice of iron oxide sulphate as an operticel is determined by the fact that it is the most active shale resin + furfuR- + urea for the system; less hygroscopic than ferric chloride (which is encircled during storage) and less aggressive than corrosive as a hardener of shale tar with sulfuric acid, scab, and in some cases preclude the production of empty building. Ratio component weight. %: shale from a mole -. (furfural + urea) is equal to 70:30. At the same time, the ratio of furfural and urea is 2; 1; The optimum amount of otveritel is determined by the change in strength and water resistance coefficient of the hardened mineral material by shale resin — furfurol — urea — in the presence of otveritel — iron oxide sulfate. Consequently, the optimum amount of shale resin for the system of shale resin + furfural urea can be considered 15 wt. % Thus, the optimal composition of the binder is chosen, weight. %: Shale resin62-67 Furfural13-17 Urea6.5-8.5 Hardener - 13–17 gallium oxide sulfate L1 check the correctness of the selected ratio of components in the proposed composition, check the quality of the optimal composition of the mineral composition developed by the tartan according to GOST 15147- 69 (in the ratio of 75% pertaining to the weight of dry mineral material). The test is subjected to four samples before

Table 1, reported in Jujetto with different percentage of components (see Table 1). The test results are presented in Table. 2. From Table 2 it is clear that in terms of the main indicators, the proposed pre-hinged preposshopite is based on slate resin with the addition of aniline, furfural and hydrochloric acid. The advantages of being offered to the binder are also the following indicators: 1. The binder can be applied in a wide range of soil moisture without changing the strength. When the moisture content of the mineral material is 7%, its strength, while reinforcing, decreases as compared with the strength of the solid material. 2. There is no dovity component in the gum - aniline 3. There is no aggressive hardener with acid, 4. Polymer concrete on the basis of the proposed binder is not inferior, and rio surpasses some indicators than currently used asphalt concrete mixtures: by swelling less than 3 times, by compressive strength in a water condition almost 3 times, in dry - 2.5 times (see table 3). 5. Shale resin is a local tlaterial for the North-West of the USSR and its use in road construction is economically viable. 6. The proposed pee can be applied in the form of an emulsion of the same composition during the construction of roads and airfields and their dust removal.

table 2

dangerous at work