Crack resistance of lightweight concretes with porous aggregates

Authors

  • K. А. Piradov Georgian Technical University, ul. Kostava 77, Tbilisi, Georgia, http://www.gtu.ge 2 State Higher Educational Institution «Prydniprovs’ka State Academy of Civil Engin, Georgia
  • G. G. Gureshidze State Higher Educational Institution «Prydniprovs’ka State Academy of Civil Engineering and Architecture», 24a, Chernyshevs’kogo St., Dnipropetrovs’k, Ukraine, Ukraine
  • E. О. Ponomarova

Keywords:

lightweight concrete, porous filler, crack.

Abstract

Goal. Getting the laws of change of fracture toughness of lightweight concrete, depending on the variation of the porous filler. Methods. Spend a multivariate experiment on variation of the following characteristics: water-cement ratio; the amount of cement paste; the maximum grain size of coarse aggregate; Humidity lightweight concrete at the time of testing; a large number of porous aggregate lightweight concrete per unit volume; cement activity. Results. Crack lightweight concrete with normal strains and shear separation increases with the cement-water ratio and used cement activity and decreases with the increase in the number of porous  aggregate  concrete  per  unit  volume,  the  diameter  and  the  amount  of  cement  paste. Practical  significance.  Optimal compositions and concentrations of corrosion inhibitors on the basis of phosphonic acids.

Author Biographies

K. А. Piradov, Georgian Technical University, ul. Kostava 77, Tbilisi, Georgia, http://www.gtu.ge 2 State Higher Educational Institution «Prydniprovs’ka State Academy of Civil Engin

Dr. Sc. (Tech.), Prof,

G. G. Gureshidze, State Higher Educational Institution «Prydniprovs’ka State Academy of Civil Engineering and Architecture», 24a, Chernyshevs’kogo St., Dnipropetrovs’k, Ukraine

Cand. Sc. (Tech.)

E. О. Ponomarova

student

References

GOST 29167-91. Concretes. Methods for determination of fracture toughness properties (toughness) under static loading. -Moscow .: Publishing house standards, 1992. - 18 p.

Piradov KA, Mamaev TL, Abdullayev KU Methods of determining the critical SIF concrete transverse shear // Proceedings NIIZhB, 1993. - p. 81 - 84. Статья рекомендована к публикации д-ром техн. наук, В.И. Большаковым и д-ром техн. наук, Д.В. Лаухиным (Украина)

Published

2016-03-22

Issue

Section

Proceedings in memory of Starodubov