Mechanical processing of concrete and reinforced concrete with diamond tool

The technology and organization of construction production using high-performance machines equipped with a diamond tool for machining concrete, concrete and stone surfaces is considered. Various installations, machines and mechanisms with a diamond tool for milling, grinding, drilling and cutting surfaces are presented. The design decisions of the grinding machine MSh-300, installations for machining the surfaces of facing slabs, a high-performance drilling machine and a concrete surface milling cutter are considered. An analysis of domestic and foreign installations has been carried out, which showed that the specific consumption of diamonds in domestic installations is lower with higher productivity. Having studied the sales statistics of manufacturers of individual machines and plants, as well as the positive feedback from implementing construction organizations, it is recommended to use, for the further prospect, high-performance machines and installations with a diamond tool in connection with an increase in the volume of reconstruction of industrial and civil facilities and the construction of transport highways.


Introduction
The increase in the production of domestic natural technical diamonds and significant production of artificial (synthetic) diamonds contributed to the intensive research and design work on the creation and production of modern ma-chines and plants with high-performance diamond tools.During this period, the author of the proposals, with the support of Gosstroy and other state organizations, designed, manufactured, tested and put into production a number of plants and machines for the machining of concrete, reinforced concrete and natural stone equipped with diamond tools [1][2][3][4][15][16][17][18][19][20].
Methods used for the machining of concrete and reinforced concrete were carried out and studied on a special de-signed stand using samples of concrete and reinforced concrete classes in B 7.5-B 30.

Methods
Installations and machines equipped with diamond tools were created on the basis of the received certificates of authorship for inventions and patents.Industrial models were https://doi.org/10.1051/matecconf/201819303013ESCI 2018 designed, manufactured and tested.A number of installations and machines for the mechanical treatment of concrete by cutting, drilling, milling and grinding of the above mentioned materials have been supplied or prepared for mass production [15,16,17,18,19,20].The team of authors of the Special design bureau of the all-Union research Institute of new building materials and JSC "VNII zhelezobeton" developed and manufactured "Installation for surface machining", based on the technical requirements developed, as well as the author's certificate for invention № 313688, published 07.10.1971Bulletin № 27.
The "Installation for tile's surface machining" (Fig. 2, Fig. 3) was developed, passed production tested and recommended for serial production, based on the author's certificate for invention № 482317.Industrial model of the specified installation was put into technological line for production of decorative facing tiles in specially designed for this purpose forms-cassette.Maximum size of tiles 600 x 600 mm with a thickness of 30-60 mm.Constructive solutions of the unit are shown in figure 2  TSEKB TSNIIOMTP designed complex installation with independent drive from the pump hydraulic power unit NSH -1628 with replaceable working bodies for cutting stone, concrete and reinforced concrete structures.Four sets of NSH-1628 were contracted in Bulgaria for manufacture and supply.These sets were transferred for production implementation.
The grinding machines MSH 100 and MSH 300 successfully passed factory and production testing and were recommended for serial production.

Deployment of authors' research with his contribution was carried out in Pronsk
Electromechanical plant of trust "Energostroymekhanizatsiya" (MSH-300, MSH-100, FF-100, FF-400) and while grinding concrete surfaces on construction sites of the military unit No. 12253 (surface of 280000 m2).

Results and discussion
In the domestic construction industry has not yet solved, in full, the problem of milling of concrete pavements, aerodrome pavements, dams, bridges and etc.The author's certificate for invention No. 1016182 "Concrete surface milling device" is aimed at solving these particular problem.
The design of the installation and machinery was carried out in parallel with the development of organizational-technological documentation and related copyright certificates on inventions referred to in the bibliography.
In addition, drilling machine (patent No. 2059464) should be of particular interest for domestic construction.
Tests were carried out on production site of trust "Energostroymechanizatsiya" Minenergo (Komarov city).The drills are recommended for serial production.In comparison with foreign analogues, for example, Christensen, the specific consumption of domestic diamond drills is 3.74 carat/m.against 4.67 carat/m. of foreign analogue and average productivity of domestic drills comes to 2.0 m/h against 1.8 m/h of foreign analogue [10][11][12][13][14].
Serial production of machines for diamond drilling of stone, brick, concrete and reinforced concrete, for example, IE-1809, due to the increase in the volume of work, should