Fine-Grained Concrete Modified With a Suspension of Chrysotile Nanofibers
This article presents the results of the study of the cement matrix modified with chrysotile nanofibers. The positive effect of this nanoadditive on the strength characteristics of thematerial was confirmed. It was noted that at the age of 7 days compressive strength of samples increased by 78% and bending strength - by 50%. Studies on a laser particle sizeanalyzer confirmed that the nanosized component of chrysotile fibers prevails in suspension, which possibly influences the structuring process in the cement matrix. Fine-grainedconcrete modified with an aqueous suspension of chrysotile nanofibers in the amount of 0.1% of the cement weight was studied using the differential thermography method, IR spectrometryand scanning electron microscopy. These analysis methods proved that the introduction of a suspension of chrysotile nanofibers into the cement binder results in a changeof the cement matrix composition and structure of a modified fine-grained concrete with the formation of calcium hydrosilicates of lower basicity, leading to an increase in thestrength of cement concrete.