Development of Compositions of Self-compacting Fine-grained Refractory Concrete
Source abstract
Abstract
This paper describes the results of laboratory tests with samples of a new generation self-compacting fine-grained re-fractory concrete (self-flow castables – SFC refractory equivalent to self-compacting concrete – SCC) and tests of the properties of products made of the developed compositions. The tests were conducted with cube specimens 100x100x100 mm in size for developed SFC and prism specimens 40x40x160 mm in size for cement pastes. Laboratory tests were conducted to determine the residual strength after heating to 800℃ and the ability of specimens to withstand sharp changes in temperature from 800℃ to 20℃ in water. A new method for selecting the composition by using main structural-rheological criteria (see section 3.1) was applied: ratio in volume of water-concrete dispersive mixture (rheological matrix of the first kind) over the absolute volume of fine sand SFSCD = VCD / VFS and ratio in volume of dis-persive fine-grained mixture (rheological matrix of the second kind) over the absolute volume in sand-aggregate SSACDFS = (VCDFS+VFS / VSA. It is shown that one of the ways to reduce the negative impact of high temperatures on the physical-mechanical properties of refractory concrete that uses Portland cement is the addition of the three slags com-ponents, that have equal thermal-expansion coefficient, amorphous silica fume of 10-15% of the cement mass. The pro-ject was conducted from February 2012 to February 2013.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovations in Concrete and Construction Materials · Tunneling and Rock Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Penza State University of Architecture and Building. Department of Technologies of Construction Materials and Wood Processing, Penza, Russian Federation.
Pavlodar State University Named after S. Toraigyrov, Department of Production and Standardization of Build Materials, Pavlodar, Republic of Kazakhstan.
Pavlodar State University Named after S. Toraigyrov, Pavlodar, Republic of Kazakhstan.
Scientific-Practice Center of Certification and Examination LLP “Irtysh-Standard”. Pavlodar, Republic of Kazakhstan.
References (29)
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