Open AccessCOMPOSITE MATERIALS BASED ON CEMENT BINDERS MODIFIED WITH SiO2 NANOADDITIVES
Author(s) -
B. M. Khrоustalev,
С. Н. Леонович,
В. В. Потапов,
E. N. Grushevskaya
Publication year - 2017
Publication title -
nauka i tehnika
Language(s) - English
Resource type - Journals
eISSN - 2414-0392
pISSN - 2227-1031
DOI - 10.21122/2227-1031-2017-16-6-459-465
Subject(s) - materials science , durability , abrasion (mechanical) , cement , composite material , nanoparticle , agglomerate , composite number , economies of agglomeration , chemical engineering , nanotechnology , engineering
Development of nanotechnologies allows to solve a number of problems of construction materials science: increase in strength, durability, abrasion and corrosion resistance that determines operational reliability of building constructions. Generally it is achieved due to nanoparticles that modify the structure and properties of the existing materials or products and are entered into their volume or on a surface layer. It’s theoretically and experimentally proved that the modified water has the bigger activity owing to the change of the ionic composition influencing the рН size and other parameters. As nanoparticles have a high level of surface energy, they show the increased tendency to agglomeration, meanwhile the size of agglomerates can reach several micrometers. In this regard an urgent task is to equally distribute and disaggregate the nanoparticles in the volume of tempering water. The experiments on studying of influence of the nanoparticles of silica distributed in volume of liquid by means of ultrasonic processing on characteristics of cement and sand solution and heavy concrete have been conducted. Nanoadditive influence on density, speed of strength development, final strength under compression of materials on the basis of cement depending on nanoadditive mass percent has been established.