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pp. 12811-12818 | Article Number: ijese.2016.953
Published Online: October 22, 2016
Abstract
This article shows high performance concretes’ role in modern construction and their effectiveness improvement processing method analysis. It was found that in present time and near future modified high performance concretes would be on high demand in construction works, which includes unique buildings and structures erection, in substitution of traditional concretes and mortars. It was defined that there are few main principles and criteria for structuring speeding and, in result, speeding of cement compositions hardening. One of which is mortar high degree supersaturation by solution products of clinker minerals in relation with crystalizing crystalline hydrates and sustaining this high supersaturation during all period of cement hydration crystallizing process until shielding is formed over cement grains. It was showed that given requirements are achieved by next methods: using extra-strong Portland cements, reducing water ratio due to water-reducing admixture, using krents admixtures. It was discovered that lately krents admixtures, functioning as the structuring center, became more widespread. This work contains complex of modifiers, based on micro silica and plasticizer admixtures on basis of carboxylate resin. Micro silica is soot, particles of which represent amorphous silica specks with average cement finesses of near 20 sq m/g as a filler. Replacing part of the cement with micro silica allows highly implement super plasticizer fluxing action, and reduce water discharge in the dispersed system under the same gravity flow in 10 times comparing to normal slurries, and partially bond hydrated lime weak coarse-crystalline phase into hydrated calcium silicate, additionally strengthening cement brick structure and concrete on its basis. Article authors states that one of the most important methods of getting super concrete is use of high alite cement with concrete mixes low water/cement ratio with complex admixtures, based on plasticizers. In this case, balancing and hard aggregate close packing in all parts allows getting concrete with optimal structure and minimum void ratio.
Keywords: Modified high performance concretes; getting basis; concrete technology; possibilities of using modified concretes; information service; construction ecologization; branch (field).
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