CC BY
0
Mamatov Kh.A. associate professor Departments of production of building materials,
products and designs Fergana Polytechnic Institute
Uzbekistan
INFLUENCE OF FLASH ASH ON PROPERTIES OF FOAM
CONCRETE
Annotation. Based on the analysis and laboratory experiments, it is preliminary possible to conclude the use of foam concrete with fly ash.
Key words: strength, fly ash, foam generator.
Lightweight foam concrete is one of the latest innovations of concrete technology in civil engineering, which can be used as an environmentally friendly material and suitable for thermal insulation. Foam concrete contains fine sand, cement, water and foam without the use of coarse aggregate [1].
Foam concrete is produced by adding foam to the mixture. The function of foam is to create air voids in the mixture, making the weight of the concrete lighter. The foaming agent is diluted in water and then air pressure is applied using a foam generator to produce foam.
Fly ash used as a filler in foam concrete not only saves resources, but also improves the properties of foam concrete. In this paper, the thermal properties of fly ash foam concrete were studied through experiments and the results were analyzed. [2,3,4,5]
The effect of fly ash on the strength of foam concrete is studied in this article. The dry density of the foam concrete used in this experiment is 600 kg/m3, which is mainly used in foam concrete for heat preservation in construction. [6,7,8] To more effectively use the fly ash from municipal solid waste to develop new foam concrete building materials, different proportions of fly ash are studied, and this paper analyzes the dry density, mechanical characteristics and microstructure appearance of foam concrete of different ages [9].
To carry out experimental studies, we used Portland cement from the Kuvasaycement plant, grade PTs400 D20, foam concrete composition (Tables 1, 2), thermal insulation and structural foam concrete grade M800 [10].
By experimentally studying various compositions of foam concrete, high performance indicators of the components were observed when containing fly ash. Structural foam concrete with fly ash was studied by manufacturing 2 series of twin prism samples measuring 4x4x16 cm. The first series was control samples, the second - with fly ash. Test periods are 1, 3, 7, 14 and 28 days after hardening. The test results are presented in table. 3[11].
Table. 1 Laboratory composition with sand, thermal insulation and thermal insulation structural foam concrete mixtures
№ Name of material Composition of foam concrete mixtures, kg
na 1 m3 control for 5 liters of batch
1. Sement 300 1500
2. Pesok frak. 0-5 mm 300 1500
3. Peno 50 250
4. Voda, l 160 800
Table 2 Laboratory composition with fly ash, thermal insulation and
thermal insulation structural foam concrete mixtures
№ Naimenovanie materiala Composition of foam concrete mixtures, kg
na 1 m3 control for 5 liters of batch
1. Sement 300 1500
2. Zola unos 300 1500
3. Peno 50 250
4. Voda, l 180 900
The introduction of fly ash into the composition of thermal insulation and thermal insulation structural foam concrete increases the strength of the thermal insulation and thermal insulation structural foam concrete during all curing
periods.
Table 3 Results of a study of the compressive strength of thermal insulation and
structural foam concrete
Name Average Compressive strength of thermal insulation and thermal insulation
№ of density, structural foam concrete (MPa) at age
samples kg/m3 and its increase ( '%), day
1 3 7 14 28
1 With sand 800 0.42 100 0.55 100 0.82 100 11 100 15 100
2 With 850 0.56 0.72 1.02 1.38 1.86
fly ash 130 130 124 125 124
Figure 1 Effect of fly ash on the compressive strength of thermal insu thermal insulation structural foam concrete
ation and
Conclusion. Thus, by experimentally studying various compositions of foam concrete, to obtain increased strength of foam concrete with the addition of fly ash.
References:
1. Samigov N.A., Djalilov A.T., Karimov M.U., Samigov U.N., Majidov S.R. Fiziko-ximicheskaya struktura sementntix kompozitsiy s superplastifikatorom novogo pokoleniya. //Jurnal.«Kompozitsionnbie materialbi» № 3.2016g.S.71-75.
2. M.U. Karimov, A.T. Djalilov, N.A. Samigov, I.V. DolbinSyntesis of supeplasticzer Dj-1 on tnephysicaland mechanical properties of tne cement pastes.//Journal of Characterization and Development of Novel materials Volume 8.Number 4 USA 2017
3. Alimovich, M. M., Abdullaevich, M. H. (2022). Investigation of the Effect of Plasticizers on the Properties of Binders Based on Gypsum-Containing Waste. Journal of Architectural Design, 6, 1-4
4. Abdimominov, I. I., Oripov, Z. B., Arislanov, A. S., Paxratdinov, A. A., Mamatov, X. A., & Ro'zmetov, F. Sh. (2022). Shahar magistral ko'chalarining transport-ekspluatatsion holatini transport shovqiniga ta'sirini baholash va prognozlash (Toshkent shahri misolida). Obrazovanie, 8(9),
5. Mirzajonov Mamurjon Alimovich Mamatov Xamidulla Abdullayevich Karimova Mukhtasar Isroiljon kizi
6. In volume 6, of Journal of Architectural Design (JAD) May, 2022 ISSN (E): 2795-7608
7. X.A. Mamatov KDj-3SMB kopleks kimyoviy qo'shimcha bilan ko'pikbeton dinamik termogravimetrik tahlili
8. X.A. Mamato KDj-3SMB kopleks kimyoviy qo'shimcha bilan ko'pikbeton dinamik termogravimetrik tahlili Nauchno-texnicheskiy jurnal FerPI 2022 Spes. Vbipusk № 2 c 155-161
9 X.A. Mamatov Vliyanie keramzita na svoystva penobetona Ekanoma I sotsium ISSN: 2225-1545 Vol.4, No 4(94), 2022
10 M.A. Mirzajanov, X.A. Mamatov, M.I. Karimova Issledovanie vliyaniya plastifikatorov na svoystva vyaju^ix na osnove gipsosoderja^ego otxoda
11M.A. Mirzajanov, X.A. Mamatov, M.I. Karimova Issledovanie vliyaniya plastifikatorov na svoystva vyajuщix na osnove gipsosoderjaщego otxoda Nauchno-texnicheskiy jurnal FerPI 2022 Spes. Vbipusk № 4 s 148-151
