Abstract
Today, dispersed-reinforced concrete is a promising structural building material. In order to improve the strength characteristics of basalt fiber reinforced concrete, authors studies the effect of prescription factors, namely the percentage of fiber reinforcement and the percentage of coarse aggregate fractions. In total, 18 series of basic samples of standard size are manufactured and tested: 27 cubes with dimensions of 100x100x100 mm for compression tests; 27 prisms with dimensions 100x100x400 mm for tensile bending tests. Also, calculations of strength characteristics are carried out depending on recipe factors, the calculations are made by the method of mathematical planning of the experiment - a full-factor experiment (FFE 22). According to the results of the study, the basic regression equations are obtained by the least squares method, which are presented in the form of polynomials of the 2nd degree. It is concluded that the most effective would be the use of basalt fiber in the amount of 4.5 % of the mass of the concrete mixture and the use of a coarse aggregate with a fraction of 5-10 mm in the amount of 40 %, and fractions of 10-20 mm in the amount 60 %.
Highlights
In order to improve the strength characteristics of basalt fiber reinforced concrete, authors studies the effect of prescription factors, namely the percentage of fiber reinforcement and the percentage of coarse aggregate fractions
Calculations of strength characteristics are carried out depending on recipe factors, the calculations are made by the method of mathematical planning of the experiment - a full-factor experiment (FFE 22)
It is concluded that the most effective would be the use of basalt fiber in the amount of 4.5 % of the mass of the concrete mixture and the use of a coarse aggregate with a fraction of 5-10 mm in the amount of 40 %, and fractions of 10-20 mm in the amount 60 %
Summary
Целью данного исследования является изучение основных прочностных характеристик базальтофибробетона за счет варьирования рецептурных факторов, а именно: изменения процентного соотношения фракций крупного заполнителя и процента фибрового армирования. Установлено, что при l/d = 100 и более достигается наилучший эффект от фибрового армирования, а также возрастает число разрываемых фибр по отношении к выдернутым, что свою очередь положительно сказывается на прочностных характеристиках фибробетона [5]. В связи с этим применение базальтовой тонов процесс разрушения протекает с формиро- фибры является более перспективным, базальтованием множественных разветвленных трещин вая фибра по прочности превосходит стальную, а [9]. Применение стальных волокон обеспечи- менения процентного соотношения фракций вает повышение прочности на растяжение при крупного заполнителя и процента фибрового аризгибе на 15–20 %, а также позволяет снизить мирования.
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