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THE STRENGTH OF THE ASPHALT CONCRETE COATING BY ADDING MINERAL
POWDER TO THE COMPOSITION OF BITUMEN ENHANCEMENT TECHNOLOGY
Khalimov Javohirbek Abdusamat ugIi
Assistant Teacher of the Department of automotive and transport
Andijan State Technical Institute Tel: +998972724646
Annotation:
In the article, to increase the strength of the asphalt concrete coating, bitumen the
enrichment of the composition and the physical and mechanical indicators of asphalt concrete
were analyzed. In the process, additives applied to increase the tolerance of asphalt concrete
Coating Laboratory the conditions are checked for strength indicators, which are now many in
our country it was compared with the strength indicators of the asphalt concrete coatings used.
As a result, the strength indicators of asphalt concrete, the composition of which was applied
enriched bitumen, are simple the type was found to have improved slightly from that of asphalt
concrete coatings.
Key words:
asphalt concrete coating, bitumen, slip consistency, surfactant,
Marshal method, strength indicators, voltage.
Introduction.
Change in climate temperature in recent years and motorization in cities a sharp increase in the
level of external forces affecting the covers of automobile roads it is causing an increase. This, in
turn, is due to the variety in the covers of car roads negative impact on quality indicators and safe
mobility by causing disruptions continues [1].
Safe and convenient movement of vehicles to the condition of road covers is inextricably linked.
Currently, in our country there are roads with asphalt concrete coating. the car makes up the
bulk of the roads [2].
This, in turn, has a negative impact on the conditions of movement and impotence in the roads of
the car shows. In the process of producing asphalt concrete mixtures with this in mind it is
necessary to increase its quality indicators[3].
Methodology.
For this purpose, in this article asphalt concrete to increase the strength of the coating by using
additional shimcha composite materials into the asphalt concrete mixture, its let's see how to
increase the properties. As a composite material from industrial waste use leads to both
economic and environmental savings [4]. Repeated effects can cause more damage to the coating
when the temperature increases. The result of violation in asphalt concrete coating on day when
the climate temperature I high and deformations occur more often.
To avoid such an effect, its consistency by enriching the composition of asphalt concrete it is
possible to increase the tolerance of its properties. This is the surface that is currently widely
used polymers, plasticizers and irons in use as active ingredients are good by applying efficiency
can be achieved [5].
Adding more surfactants to the composition of bitumen and asphalt concrete
we have carried out laboratory research work. In this process, the most in world practice one of
the common and promising project are thermoplastics and elastomers we enriched the
composition of bitumen with plasticizers that combine properties. This by using plasticizers, it is
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possible to improve the quality indicators of bitumen. Bitumen in order to increase the quality
indicators, it is desirable to use a polymer solid in a ratio equal to 2.5-6% of the total mass of
bitumen.
Figure 1.
plasticizer used to enrich bitumen content and bitumen samples made by pouring into
molds for laboratory testing
To do this, the selected bitumen sample is placed in a metal container with a volume of about 10
liters it is placed and placed in a thermal cabinet with a thermometer. Bitumen sample 145-
155°C it is heated to a temperature of, while the temperature should not exceed 160°C. The
reason is the temperature overheating bitumen and changing the properties of the materials used
for it can. When the bitumen is heated to the temperature indicated above, it is heated from a
preheating oven to it is removed and poured into a laboratory mixer. The mixture is all at a
temperature of 160-180°C the components are kept stirring for 1-1.5 hours until they are
completely combined. The composition is homogeneous upon arrival, it is poured into Test
molds and test works gost-33137-2014 done (Figure 2).
The results are also compared in Table 1 below. [6-8]
Figure 2. Bitumen sample testing process. a) testing on a Ductilometer B) softening temperature
(ring and sphere method)
Result
Pre-and post-modification results of BND 60/90 bitumen
№ Specification names
Scale
unit
GOST on
Bitumen
real
value
Modification
in the Made
value
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1
Needle immersion depth
°C
0,1 mm
61-90
66.3
43
Less than 20
not
27
21
°C
2
Softening
temperature
(ring
and by balloon)
°C
Less than 47
not
48.4
54.9
3
Solubility,
At 25 °C
At 0 °C
sm
Less than 55
not
72
3.7
59.4
3.9
4
Mortar temperature
°C
-15
-12.4
-14.6
5
Flash temperature
°C
230
From 230
high
From 230
high
6
Penetration index
-
(-1)…1
-1
-0.7
In addition, the amount of the selected plasticizer added to the bitumen sample research has been
done on how bitumen affects mortic temperature. In this common asphalt concrete plasticizer
BND 60/90 in the amount of 0.5% to 1% of the mass of the mixture results were obtained by
adding bitumi.
Conclusion
The level of motorization in recent times is especially acute the number of heavy cargo vehicles
increasing the amount of loads and exposure time from them to asphalt concrete coatings,
various defarmatory disorders and cracks appear in asphalt concrete coatings.
- Taking these into account, we have enriched the content of bitumen within the framework of
our research work to determine its quality indicators have a particularly high temperature
stability and cold tolerance we increased. Through this we have been able to create asphalt
concrete that tolerates the effects of hot and cold climates.
- While in the process of making asphalt concrete, add to it a little surfactant material (polymer
and cellulose) through the joint swelling, its compressive strength is 3 times that of ordinary
asphalt concrete we managed to get a more solid modified asphalt concrete.
By applying these in practice, it is resistant to the effects of hot and cold climates, as well as
heavy load durable asphalt concrete car resistant to loads falling from vehicles we will be able to
build roads and increase its service life through it.
Literatures
1. Tulaganov A.Kh., Kayumov H.T. “Engineering geodesy”. “Complex Print”., Tashkent.-2019.
-264 p.
2. Tulaganov A.Kh., Mirzayeva Z.M. “Engineering geodesy”. “Economics-finance”., Tashkent-
2019. -143 p.
3. V.F. Babkov, O.V. Andreyev “Survey and design of highways”
Part I. Tashkent. 2001,2004
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271
4. V.F. Babkov, O.V. Andreyev “Survey and design of highways”
Part II. Tashkent-2015. 493 p.
Additional literature
5. Decree of the President of the Republic of Uzbekistan dated December 12, 2019 No. PF-5890
“On measures to deeply reform the road system of the Republic of Uzbekistan”. 9.12.2019
6. Decree of the President of the Republic of Uzbekistan dated February 7, 2017 No. PF-4947
“On the Strategy of Actions for the Further Development of the Republic of Uzbekistan”
7. Safarov E.Yu. Geographic Information Systems. – T.:, University, 2010
8. Gulomova L.Kh., Safarov E.Yu., Abdullayev I.U. Geoinformation Systems and Technologies.
(Parts 1-2)-T.: University, 2013. – 130 p
