## 4 Discussion  
The studies carried out, reflected in the literature review, show that the main task of previous research was to improve the structure and mechanical and physical properties, for concrete of various densities, both heavy and lightweight due to the use of alkaline components. At the same time, only a few of them considered alkaline water, as most of them preferred to obtain an alkaline component through the use of a slag-alkaline binder. Furthermore, it was assumed that the use of slag and fly ash, in the correct dosage, with rational composition and technological parameters, would improve the characteristics and structure of concrete. The effect on the properties and structure of heavy and lightweight concrete has been noted. At the same time, there have been no previous studies aimed at investigating the effect of vibro-centrifuged factors on the characteristics and structure concrete, as well as any other centrifugally compacted concrete with the use of alkaline components: binders, water, or fillers [1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32].  
It should be noted that only works [21; 22] are devoted to the issue of structure and structure formation to a large extent, while in our study the issue of structure plays an important role. In addition, we are considering a more universal relative indicator-coefficients, in contrast to other works [1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32], where absolute indicators were considered.  
Thus, the novelty and fundamental difference of the research carried out in this article is the control of the variatropy of concrete obtained by the centrifugal compaction method. Additionally, a feature is the effect on water, which allows the use of standard Portland cement, which is more traditional and, so far, the most widely used for these exclusive and special products and structures as centrifuged and vibro-centrifuged reinforced concrete elements.  
At the same time, in our study, special attention is paid to the quantitative value of the pH index, which is very effective in certain ranges; however, if we go beyond this range, we can get a negative effect in the form of corrosive effects and other destructive consequences for the structure of concrete or its reinforcing elements. Additionally, one of the risks of the proposed technology is the possible occurrence of an alkali-silica reaction.  
Thus, firstly, it is possible to note the novelty of the research carried out, its practical significance and applicability for reinforced concrete with an improved structure of concrete of annular section, and also determine the trajectory and vector of the direction of subsequent research.  
In the future, the study of lightweight and heavy fiber concrete with variatropic and non-variatropic structures on alkaline water, namely the interaction of water with rational alkaline indicators with metallic and non-metallic dispersed fibers, will be promising.  
Additionally, a promising direction is a search for rational ways based on neural networks [40] of joint complex application of nanostructuring and nano-modifying components with water activated by alkalis in the composition of concrete to obtain the most effective types of products and structures.  
Based on the comparison of our work with the research of other authors, we note that we have achieved the following scientific results for the first time.  
From the point of view of fundamental science:  
received new knowledge about the processes of structure formation of variatropic concretes;  
describes the physicochemical aspects of improving their performance characteristics with alkaline activation of water for concrete mixes.  
From the point of view of applied sciences:  
the practical dependences between the input technological factors and the output parameters of ready-mixed concrete are set and confirmed.