Crack resistance of lightweight concretes with porous aggregates

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.