SU1500000A1 - Method of preparing drainage covering - Google Patents

Abstract

The invention relates to land reclamation construction and can be used in land reclamation in the construction of horizontal drainage. The purpose of the invention is to expand the range of granules of used ash and slag waste, increase their filtration coefficient and increase the water intake capacity of drainage. For the preparation of drainage dusting, dusting in ash and slag waste is added sand in the amount of 10-40%. The mass content of the sand in the mixture obtained should satisfy the condition dH 2.42–10 cm, where deoc / dioc is the coefficient of the grain ratio of the mixture; dioc, di7c, deoc are the diameters of the particles of the material of the mixture, less than which its composition contains 10 ... 17 ... 60 May.%. Ashes and slags are suitable for drainage sprinkling, the filtration coefficient of which is more than 6.94-10 cm / s. Adding sand enhances the ash and slag filtration characteristics and expands the range of granules used in the ash and slag waste in the drainage bedding. 2 ill., 2 tab. N.

Description

The invention relates to the field of land reclamation and can be used in land reclamation in the construction of horizontal drainage.

The purpose of the invention is to expand the range of composition of the used ash and slag waste, increase their filtration coefficient and increase the water intake capacity of the drainage.

Figure 1 shows the curves of the particle size distribution of mixtures; figure 2 - plot of P% sand from

% -dk

The proposed method is carried out as follows.

As the starting material take ash and slag, the particle size of which is given in Table 1. According to the data of Table 2, a graph P f (d) is built (cr. 2, fig. 1), plotting the percentage of particles on the ordinate axis by their aggregate (total percentage), and the logarithms of particle diameters on the abscissa axis. As can be seen from the graph, the raw ash material does not meet the requirements for drainage filters, it is outside the zone of allowable composition of ash and slag (cr.1, figure 1, known method).

Sand is added to ash and slag, the particle size distribution of which is given in Table 1.

sl oh oh oh oh oh

These materials comprise a mixture in which the sand content is in the range of 10-40%, for example 13% by weight (mixture 3, Table 2). The granulometric composition of the mixture is determined by the sieve method, the result is given in Table 1. The submitted table 1 shows the curve of the particle size distribution of the mixture (cr.5, figure 1). Curve 5 is used to find the characteristic diameters of the particles of the mixture: dio, di7 and deo, determine the value of the difference ratio of the mixture g) and the value

Parameter d All definitions are summarized in Table 2. In this example

parameter h dl 2.71 cm, i.e. satisfies the condition v S 2.42 cm, where is the coefficient of graininess

deoc of a mixture, defined by the ratio - :;

about 10s

dioc; di7c and deoc are the diameters of the particles of the material of the mixture, less than which its composition contains 10 ... 17 .., 60 May.%.

The resulting mixture satisfies the requirements of drainage filters, namely, the filtration coefficient is more than 6 cm / s. -.

Claims (1)

Claims method of preparing drainage dusting based on ash and slag waste of thermal power plants, characterized in that, in order to expand the range of grain composition of the ash and slag waste, increase their filtration rate and increase the water intake capacity of drainage, dust and slag waste from thermal power plants additionally sand and take them in the following ratio, wt.%: Sand 10-40 Ash and slagEverything moreover, the content of sand in the mixture by weight is determined by the condition VJTT- 2 ,. where is 7c deoc dioc - coefficient | mixture diversity ratio: dioc. di7c, deoc - diameters of the particles of the material of the mixture, less than which its composition contains 10 ... 17 May 60%. Table 1 eN th j s with; Yu "TJ .. 0.05 0.1 r d io l: 0.5 W cpu.i l fl 3.0 l: fff b