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EFFECT OF CHEMICAL ADDITIVE " BETON STRONG-17"
ON THE MECHANICAL PROPERTIES OF CONCRETE
Abilov Elyor Ermamatovich
, PhD, Associate Professor.
Republic of Uzbekistan. Termez city. Termez State University
of Engineering and Agrotechnology
Email address: elyor.abilov.90@mail.ru
Tel: +99899-674-05-93.
Turapov Farxod Xursanovich
, Senior Lecturer.
Republic of Uzbekistan. Termez city. Termez State University
of Engineering and Agrotechnology
Email address: farkhodturapov@mail.ru
Tel: +99891-229-75-75
Aliboyev Najmiddin Ne’matulloyevich
, student
Republic of Uzbekistan. Termez city. Termez State University
of Engineering and Agrotechnology
Email address: aliboevnajmiddin2005@gmail.com
Tel: +99897-194-08-05
Annotation:
This article provides information on the chemical additives used in
the preparation of concrete products and construction mixtures.
Keywords:
concrete, chemical additive, mix, convenient location, physical and
mechanical properties.
INTRODUCTION
It is no exaggeration to say that in recent years the Republic of Uzbekistan has
become a major construction site. Large-scale construction of industrial, residential
and public buildings is being carried out at a high pace in all regions of the country.
Therefore, improving the production of modern building materials, including the
implementation of promising projects, technical and technological modernization of
enterprises - is a requirement of the times.
Chemical additives are one of the simplest and most easily accessible
technological methods of improving the properties of concrete. Its application allows
to dramatically reduce the cost of production of reinforced concrete structures,
significantly increase product quality and service life. Therefore, the application of
concrete technology with the addition of chemical additives in construction practice is
of great importance in the leading countries of the world. To date, the share of concrete
with chemical additives is more than 80% in Japan, more than 70% in the United States,
Germany, France, Italy.
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Main part
Currently, there is no single classification of chemical additives for cement mixes
and concretes worldwide. Different classification schemes of chemical additives have
been adopted in different countries. Along with the CIS countries, chemical additives
for concrete and mixtures in accordance with GOST 24211- 103 in Uzbekistan are
divided into the following 2 groups:
The first group is additives that adjust the properties of the finished building mix
and concrete mix. These include plasticizers (superplasticizers, strong plasticizers,
plasticizers) additives, stabilizing additives, additives that adjust the maintenance of
mobility, porous additives (air intake, foaming, gas-forming) additives.
The second group is additives that change the properties of solid construction mix
and concrete. These include additives that adjust the kinetics of the solidification
(accelerator, decelerator), additives that increase strength, additives that reduce
permeability, additives that increase the protective properties of the reinforcement,
increase frost resistance.
The applicability of any chemical additive to this or that group is determined by
the criteria of effectiveness in accordance with GOST 30459.
The most effective modern superplasticizers are polycarbonate-based
superplasticizers. For example, GLENIUM superplasticizer (BASF, Germany) is one
of the most effective chemical additives. The mechanism of their effect on cemented
systems is given.
The choice of chemical additives to improve the properties of concrete and
reinforced concrete is a simple matter. Therefore, it is very important for professionals
to know their classification and mechanisms of action on cemented systems.
“Betong strong-17” the effect of the additive on the compressive strength of
concrete.
Table 1
Beton-strong-
17
7 day sample
28-day sample
0
40
43,3
0,5
43,1
58,7
1
42,3
52,1
1,5
42,6
44,8
2
36,6
56,3
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Figure-1. “Betong strong-17” the effect of the additive on the compressive
strength of concrete.
1) 7 day sample. 2) 28-day sample.
CONCLUSION
In short, many measures are aimed at improving the mechanical properties of
concrete. One of the main directions of scientific and technological development in the
field of reinforced concrete production is the reduction of technological processes,
product quality and durability based on superplasticizers, hyperplasticizers and new
generation complex chemical additives to concrete technology. The introduction of
superplasticizers in concrete dramatically increases the convenient placement of the
concrete mix and improves the physical and mechanical properties, operational
properties of concrete.
REFERENCES
1. HA Akramov, HN Nuritdinov Technology of production of concrete and
reinforced concrete products. Toshkent 2011.
2. NASamigov Energy and resource-saving building materials and technologies.
Textbook. Toshkent 2016.
3. NA Samigov Materials science of repair of buildings and structures. Textbook.
- T .: National Society of Philosophers, 2011
