In this paper the influence of technological factors on the formation of properties of finegrained concrete is shown. Rapid hardening concrete, modified with complex chemical admixtures, for prestressed precast hollow core slabs produced by continuous extrusion forming were designed.
The possibility of obtaining Self-Compacting Concrete with a large amount of supplementary cementitious materials, including fly ash is shown in this article. Research results of rheological properties of fiber reinforced Self-Compacting Concretes with high volume of fly ash and chemical admixtures, which regulate fluidity and viscosity of concrete mixes, are shown. It was established that the replacement of 55, 70 and 85 wt. % of binder with fly ash allows to obtain Self-Compacting Concrete mixes with the consistency class SF2, viscosity T500 = 5 s and the volume of entrained air 0,4 %.
The article shows that one of the ways of realization of energy efficient building principles is the introduction of the technology of permanent formwork using monolithic concrete (technologies Quad-Lock and “Tehnoblok”). The use of concretes with high thermal mass provides thermal stability of the premises, decreases the amount of energy for heating and cooling, reduces the emission of greenhouse gases. Development of Ukrainian road infrastructure and its repair are required the use of rapid-hardening and durability materials.
The work is dedicated to improving the methodology of calculation of regulation of the stress-strain state of metal trussing statically indeterminate composite structures. When searching for project management considers the problem of lowest mass systems with given geometry and material designs make rods. Problem calculating the regulation of the stress-strained state of the system is reduced to the solution structures in a deformed state by a system of equations and statics, and those efforts.
Розроблено шихтові склади силікатних мас системи скло – глина – цеоліт –
органічна водорозчинна добавка. Проведено випал зразків за швидкісним режимом за
температури 850–1000 °С з витримкою за максимальної температури 20, 25, 30 хв.
Досліджено вплив вмісту органічної добавки на міцнісні показники сформованих
гранул та її роль на процес поризування. Досліджено вплив часу витримки за
температури 1000 °С на формування пористої структури досліджуваних зразків.
The investigation results of type B fine asphalt concrete and its form modified by rapeseed oil epoxide are represented. The efficiency of ERO addition and its positive effect on the physico-mechanical properties of asphalt concrete has been established.