Реферат на тему Микроамирование бетонов различными видами волокон (стальные, полипропиленовые, базальтовые, стеклянные)

Содержание:

1. Review of scientific works. 3

2. Terminological dictionary. 6

3. Post about scientific work. 18

4. Synopsis of the monograph. 19

5. Translation of text from a
foreign language. 20

Bibliography. 27

Введение:

Заключение:

Фрагмент текста работы:

1. Review
of scientific works 1. Y.E.
Begicha, S.V. Klyuevb, V.A. Josa, A.V. Cherkashina. Fine-grained concrete with
various types of fibers.

This paper
investigates the strength properties of the fine-grained concrete reinforced
with the amorphous fiber based on the Fe-B-C system and obtained by the
"spinning" method, and concretes reinforced with commercially
available types of fibers: fiber based on mineral wool, basalt fiber,
fiberglass, steel and polypropylene fibers. The flexural and compressive
strength tests with the fiber-reinforced concrete specimens were carried out in
accordance with the standard method corresponding to the Russian State Standard.
The analysis of results was made by comparison with the characteristics of the
control specimens without reinforcement. The best flexural strength
characteristics were shown by specimens with the amorphous fiber, while the
highest compressive strength was demonstrated with the steel fiber. The
addition of the amorphous fibers leads to an increase of 56 % in the flexural
strength, but decreases the compressive strength by 30 % compared to the
control specimens, which proves the efficiency of this fiber working in
bending. The addition of the steel fiber shows an increase of 20 % in flexural
strength and an increase of 14 % in compressive strength, which confirms the
positive effect of adding a commercially available fiber to the fine-grained
concrete. The compounds of the fiber concrete with the compression strength
limit up to 38 MPa and tensile strength in bending up to 12 MPa were developed,
which allows to use amorphous fiber as a compound of fine-grained concrete in
the construction industry.

2. Alaa
Zamel Dahesh, Farhad Mohammed Othman And Alaa Aladdin Abdullah-Hamead. Use of
polypropylene microfibers to improve mass concrete by controlling the crack
sealing mechanism.