INVESTIGATION OF STRENGTH PROPERTIES OF LIGHTWEIGHT
CONCRETE WITH DISPERSED REINFORCED FIBERS
Tillaev Mirjalol Abdubanonovich, Jizzakh polytechnic institute, doktorantPhD
Botirov Bektosh Farhod o`g`li, Jizzakh polytechnic institute, magistr
Abstract:
In article are brought varieties of the asbestos filaments and prospects of their
using as disperse mature (fibers) for the concretes used for read covering and hudrotechnical
constructions.
Key words:
reinforced, concrete,
micro-cracks
From the experience of light concrete operation, it is clear that thin-walled structures and
other engineering buildings and structures can cause micro-cracks on the surface. However, its
characteristics, such as durability and cracks in the bending of the concrete, remain one of the
problems that is not fully resolved. Therefore, to enhance the properties
of concrete such as crack
strength, elasticity, durability, it may include dispersion fiber materials such as basalt, vollastonite,
asbestos, glass and polymer fibers.
One of these fibrous materials is fiberglass, which is highly heat resistant and resistant to
alkali, has a very strong stretching strength (higher than even the strongest steel) and is resistant
to cold. The fact that glass fibers have good adhesion (intermolecular adhesion) with concrete
suggests that it can be used as a dispersion fixture in concrete. This is because the fiber-like (wooly)
structure prevents the formation of a solid frame in the concrete structure,
which prevents
microstructure in the concrete. For this reason, dispersed reinforced concrete with fiberglass can
be used effectively in thin shell slabs and spatial structures.
Based on the foregoing, special tests were conducted at SamSAI Research Laboratory No. 5
to investigate the strength properties of lightweight dispersed reinforced concrete with glass fibers.
The concrete cube of 10x10x10 cm and 10x10x40 cm concrete prisms were prepared for the
experiments.
Slag portland cement of ―Kizilkumcement‖ was used as a binder for the manufacture of
concrete. Its activity is -37.6 MPa; the beginning of the retention period is 1 hour 40 min, expiration
time is 3 hours 20 min; water demand 29%; actual density 3.1 g / cm3 ; packing density 1650 kg /
m3 ; surface area - 2000 m2 / g.
Sandstone was used as a fine filler. The modulus of sand is 3.38; actual density - 2.65 g /
cm3 ; packing density - 1550 kg / m3 ; porosity - 47%; humidity - 5,8%; Specific surface - 28.79
m2 / kg. Glass fibers were used as dispersion fittings. These fibers are 5… 20 mm long, 0.1-0.5
mm in diameter and have high adhesion properties. Its average density is 40... 50kg / m3 ; Based
on the basic characteristics of these concrete components, the content
of dispersed reinforced
concrete with simple lightweight and glass fibers was determined.
Specifically, the lightweight concrete content of 30 MPa (for 1 m3 concrete mixture with a
mobility of 4... 5 cm) is as follows: cement -500 kg; ceramic sand - 800kg; water-300 l. The ratio
is as follows: Ts: Q = 1: 1.6, where C / C = 0.6. Estimated density of concrete is rv = 1300 kg / m
3
.
GULIYEV ABDULAKIM
ABDUKADIROVICH,
QARAYEV SOXIBJON SOBIR O’G’LI
ISSIQLIK ROLI VA ISSIQLIK UZATISH
USULLARI
58.
TANGYARIKOV NORMUROD
SAITOVICH
ABRAEV MAMARASUL
EMINOV ASHRAP MA’MUROVICH
MULLAJONOVA ZIYODABONU
SAYFULLA QIZI
DEVELOPMENT OF TECHNOLOGY FOR
PRODUCING POROUS ERAMICS USING
WASTE FROM THE COAL INDUSTRY
164
59.
AGZAMOV JAHONGIR BAXTIYOR
O’G’LI
ABDURAXMONOV MIRQOSIM
MIRAZIM O’G’LI
MAGISTRAL YO’LLARNING KO’RINISHI
CHEKLANGAN IKKINCHI
DARAJALI KESISHMALARDA
HARAKATLANADIGAN AVTOMOBILNING
HARAKAT XAVFSIZLIGI
TAKOMILLASHTIRISH
168
60.
AGZAMOV JAHONGIR BAXTIYOR
O’G’LI, O‘NG‘ALOV SHAXZOD
CHORRAHALARDA
SVETOFOR SIKILLARINI
HISOBLASH VA HARAKAT XAVSIZLIGINI
TA’MINLASH
171
61.
ALIYEV M.R., XANDAMQULOV SH.B.
BINOLARNING ENERGIYA TEJOVCHI
USLUBLARINI TAHLIL QILISH VA ENERGIYA
SAMARADORLIGINI OSHIRISH
174
62.
AXMEDOV ALISHER TOIROVICH
TUPROQQA ISHLOV BERISH
MASHINALARINING SAMARADORLIGI
176
63.
AZIMOV AKMAL
O’NG’ALOV SHAHZOD
TEXNIK-MEXANIK MUTAXASSILIGI
BAKALAVRLARINING KASBIY
KOMPETENSIYASINI SHAKLLANTIRISH VA
RIVOJLANTIRISH YO’LLARI
179
64.
XOLDOROV BAXODIR BARATOVICH
ERMATOV OTABEK SAYITOVICH
QUROLOVA MUQADDAS
ISHLAB CHIQARISH TARMOQLARIDA
INNOVATSION TEXNOLOGIYALARNI JORIY
ETISH
181
65.
TILLAEV MIRJALOL
ABDUBANONOVICH
BOTIROV BEKTOSH FARHOD O`G`LI
INVESTIGATION OF STRENGTH PROPERTIES
OF LIGHTWEIGHT CONCRETE WITH
DISPERSED REINFORCED FIBERS
184
66.
D.SHAMIYEV
B.RUZMATOV
BAZALT TOLALARI FIZIK-MEXANIK
XUSUSIYATLARIGA TA`SIR ETUVCHI
OMILLAR TADQIQI.
186
67.
Д.Б.ШАМИЕВ
М.А.ДОНИЁРОВА
ТУРЛИ ЎРИЛИШЛИ ТЎҚИМАЛАРНИНГ
ДЕФОРМАЦИОН ХУСУСИЯТЛАРИНИ
ТАДҚИҚ ҚИЛИШ
190
68.
ERGASHEVA KAMOLA ILXOMJON
QIZI
AVTOMOBIL
TRANSPORTIDA HARAKAT
PARAMETRLARINI
GPS TIZIMI ORQALI JORIY ETISH
MUAMMOLARI.
193
69.
ХУДАЙБЕРДИЕВ АБДУАЗИЗ
ҚОБИҚЛАНГАН ЧИГИТЛАРНИ
ТАКОМИЛЛАШТИРИЛГАН ҚУРИТИШ
ҚУРИЛМАСИ
196
