Research into effect of complex nanomodifiers on the strength of fine-grained concrete

Abstract

Досліджено вплив наномодифікаторів на міц ність дрібнозернистого бетону. Встановлено вплив найбільш широко розповсюджених нанонаповнюва чів, а саме мікрокремнезему, каоліну, вапна та гіпсу на змінення міцності цементного каменю та дрібно зернистого бетону. Виконано порівняння впливу означених нанонаповнювачів на міцність дрібнозер нистого бетону. Показано, що найбільш ефективни ми нанонаповнювачами є речовини, що містять спо луки кальціюКлючові слова: дрібнозернистий бетон, міце ли, поверхневоактивні речовини, нанонаповнювач, наномодифікатор, міцність Исследовано влияние наномодификаторов на прочность мелкозернистого бетона. Установлено влия ние наиболее широко распространенных нано наполнителей, а именно микрокремнезема, каолина, извести и гипса на изменение прочности цементного камня и мелкозернистого бетона. Выполнено сравне ние влияния указанных нанонаполнителей на проч ность мелкозернистого бетона. Показано, что наи более эффективным нанонаполнителем являются вещества, содержащие соединения кальцияКлючевые слова: мелкозернистый бетон, мицел лы, поверхностноактивные вещества, нанонапол нитель, наномодификатор, прочность UDC 666.948: 666.972.112

Determining the rational compositions of low-strength concretes

“…However, the influence of a granulometric composition of the filler, taking into consideration the presence of iron ore tailings, was not, similarly for the above works, studied. Interesting results from studying the properties of new formations in cement concretes that use the iron ore dressing waste as a fine filler and surfactants, were obtained in [11]. These results explain the positive influence of iron-containing impurities on the properties of cement concretes.…”

“…Thus, given that the volumes of concrete with an average strength of [10][11][12][13][14][15] MPa amount to about one per cent of the total annual volumes of concrete used, that makes up tens of thousands of cubic meters. If the efficiency of cement utilization in them could be close to the efficiency demonstrated by concretes with a higher strength, one would save thousands of tons of cement annually.…”

Formation of the strength of fine-grained concrete based on modified slag Portland cement

“…In work [6] micro silica and crushed chalk were used as concrete nanomodifiers, but the research was conducted on Portland cement. Work [7] used a mixture of mineral dispersion systems of man-made origin, which have d-elements in their composition, but research was also carried out on Portland cement or complex modifiers of various types [8]. But the production of these concretes is hindered by the difficulty of uniform distribution of nano-additives in the volume of concrete.…”

Fine-Grained Concrete for Repair and Restoration of Building Structures

“…For metaacolin, the disadvantage is its high cost due to rather high energy consumption for its preparation. On the basis of the above, as well as the results of studies in the field of micellar catalysis of reactions of synthesis of calcium hydrosilicates [12], the purpose of research was determined, the results of which are presented in this paper.…”