Information estimate of natural geosystem preservation in geoconstruction

The area of the research is natural geosystem preservation in geoconstruction. The aim of the research is introduction of information assessment of preservaton level using total geoecological parameter in geoconstruction. Three features were chosen as the main geoecological information features of the estimate, prediction and geosystem preservation management, they are: natural raw materials consumption, fuel consumption and useful properties of a mineral geostructure with the end of the life-cycle. Rating method is suggested as a method of the rasearch;it includes conversion of the properties, using certain mathimatical operations into dimensionless values named index of properties. By determining weight factors with the help of expert assessment and bydetermining the sum of productions of indices and coefficients as total geoecological parameter, the study shows the relationship of the latter with the values of the real consumption of natural raw materials, fuel and useful properties of wastes with the end of the life-cycle of a geostructure. Also the study suggests the achieved levels of the preservation and predicted increase of the level takinginto consideration the total geoecological parameter. The results can be used for estimate of any geotechnology in the preservation aspect.


Introduction
The area of the reaserch is preservation of the natural geoenvironment in geoconstruction to provide life for present and future generation of people.
The article assesses geoecological properties of structure elements of construction geoobjects and their total values taking into consideration the relationship of raw material, Pr,energy components, Pλ, and useful properties of mineral wastes obtained with the end of life cycle, Pupn [1][2][3][4][5]. Also the arcticle analyses the most informative geoecoprotective properties of mineral cement-containing geostructures as the most widely-used in geoconstruction activiies [6][7][8][9][10].
The aim of the research is to introduce the total information geoecological parameter (GEP) in geoconstruction which informs about the achieved and predicted level of the natural geoenvironment preservation and about the possibility to increase the level of preservation, so, the total geoecological parameter (GEP) is the function of the properties:

Methods
The rating method of weight factors was chosen to calculate Such kind of methods applied in green civil construction technologies.
This method makes it possible to assess the propeties charecterized by different measurement units on the uniform scale. Using certain mathematical operations the properties are converted into dimensionless values, then using further mathematical operations GEP is calculated. It is supposed that the higher the GEP values of a geoconstruction are, the higher the level of protection and preservation of the natural geosystems is [12][13][14][15][16][17].
According to the method, for each of the 3 components of the properties has been found the means of converting its value up to the range from 0 to 1. For that purpose it was specified the interval of the values of the property componentthe best and the worst value from the specified interval. The best value is a normalized value within an open range from 0 to 1. This range is called the range of indices, i.e. we have geoecoloical properties and indices of these properties.
Therefore, mathematical operations make it possible to present a geoecological property as a dimensionless value which is called the property index and is calculated from the graph, and then, considering the weight factor of significance, it becomes a component for GEP calculation according to the formula (1).
The weight factor of significance is formed in percents determined by expert assessment. And the weight sum of all the properties should be 100%. Then GEP is calculated as the sum of components repersented by the product of the property weight significance and the geoecological property index, found grafically. Geoecological property with the best value has the property index equals 1, if the property has the worst value the index will be 0.
GEP gradation is by 100-point scale. 1 point is accepted to be a knowingly low indicator, 100 pointsmaximum one. The sum of the weight factors of all the parameters, as it was mentioned before, should be 100. So: where kiweight factor of i-property; iPiindex of i-property under consideration.

Results and discussion
Taking into consideration the expert assessment each of the properties was given the significance in percent, then the total geoecological parameter (GEP) was calculated according to the formula (2).The obtained resultsand GEP parameter are shown in Table 1.
The data in the table 1 shows that the GEP values differ by more than an order depending on geoecological properties.
According to the values of table 1 the highest GEP value -83,6 belongs to a geostructural building element of 1m 3 volume and D500 density. The research analyzed fuel and energy consumption through time (if we accept that 50 years is envisaged life cycle) for 1 m 3 (geostructures with different GEP values). According to the values of table 1 the highest GEP value -83,6 belongs to a geostructural building element of 1m 3 volume and D500 density. The research analyzed fuel and energy consumption through time (if we accept that 50 years is envisaged life cycle) for 1 m 3 (geostructures with different GEP values).
Known formula (3) was used to analyze the relationship of GEP of a building geoelement of the 1 m 3 structure with the fuel consumption where Qhlheat loss by a geostructure; Fsquare (of a structure), m 2 ; dtdifference of operating temperatures (external and internal); k-heat transfer coefficient of a barrier structure. The results of the research, which are in accordance with the ideas in the works [18][19][20][21][22] makes it possible to claim that preservation levels with GEP from 80,4 and higher meet the requirements of the geoenvironment protection. Preservation levels with GEP lower than 80,4 don't keep the natural environment productive for the life of people generations.
If the relationships of GEP with consumption of natural raw materials, fuel and waste useful properties are true as an information platform of new geoecoprotective technologies, it is possible to set acertaincourse to predict the protection of natural-technogenic systems of GEP. It has been shown, that taking into consideration GEP values it is possible to predict the protection by considering fuel consumptionthe higher the GEP value of a building geostructure element is, the lower the fuel consumption is throughout the life cycle of an object. But it is possible to control GEP values, increasing, for example, resource conservation: the less natural raw materials have been used, the higher GEP value is. Also it is possible to reduce the share of natural raw materials by using technogenic raw materials instead of natural ones, or by lowering the density (air dilution) of a construction geoelement.
To test these results it has been used special technogenic raw material (nepheline slime) which contributes to energy conservation (for construction geoelement of 83,6 GEP) and to air dilution at the same time.
Calculations have been done in the construction of a geoecological structure, total volume of construction elements 500 m 3 with improved geoecological featuresreplacement of some raw materials by special technogenic ones (nepheline slime) and using D200 foamed concrete as heater. Tables 2,3,4,5 show the obtained data.   Based on the calculations the building geostructure has been suggested with total volume 10 m 3 , square 40 m 2 with GEP =92. This structure predicts saving fuel and energy resources throughout the whole life cycle of the structure element (50 years) (see Table 6).

Conclusions
1. For information assessment of natural geosystem preservation a total geoecological parameter (GEP) has beensuggested,which includes the system properties of natural raw materials and fuel consumption as well as useful properties of a mineral structure with the end of its life cycle. 2. To calculate the total preservation parameter (GEP) the research suggests using the rating method which includes the conversion of properties into dimensionless indices with determination of weight factors of the properties. The study gives the numerical values characterizing the levels of geosystem preservation: at GEP values less than 80 the productivity of a system is not provided. 3. The article shows a possibility to increase the preservation level taking into consideration the influence on the parameter.