Impact of self-compacting concrete for construction sites
Аннотации
This article presents the current state in the world and local experience of selfcompacting concrete (SCC) application. According to the results of the market analysis, a significant
share of the SCC market belongs to the countries of the Asia-Pacific region. As the analysis revealed,
the largest volume of SCC ever filled on construction sites was found in Abu Dhabi – more than 200
thousand cubic meters. As part of this study, a comprehensive development of a new generation of
SCC compositions was carried out, based on local inert materials, chemical and mineral additives.
A number of laboratory tests were conducted and three unique recipes were selected for the SCC
M350 B25 with characteristics exceeding the quality of conventional concrete of the same brand and
class. Educational seminars on the subject of SCC were organized for employees of a number of
construction sites and a concrete plant in Nur-Sultan. Three pilot SCC pours with a total volume
of 70 cubic meters were carried out at the Nur-Sultan construction sites. Tests with destructive
and non-destructive methods were performed, which confirmed the declared characteristics of the
SCC. It is established that the developed compositions gain 70-90% of the grade strength for 3 days
of curing. On this fact, it is possible to assume about potential economic effect for building sites
obtained due to the acceleration of construction pace. It should be noted that this effect would
be different in each of the sites, due to different influencing conditions. Thus, the pilots achieved
savings of 5000 tenge per each cubic meter of poured SCC.