Publication detail

CHARACTERISTICS OF RECYCLED CONCRETE AGGREGATES MADE OF DEFECTIVE ELEMENTS FORM PRECAST PRODUCTION

NOVÁKOVÁ, I. STAVAŘ, T.

Original Title

CHARACTERISTICS OF RECYCLED CONCRETE AGGREGATES MADE OF DEFECTIVE ELEMENTS FORM PRECAST PRODUCTION

Type

abstract

Language

English

Original Abstract

The use of recycled concrete aggregates (RCA) is widely known but in practice is rarely used especially in Czech Republic where is great amount of natural aggregates sources. There are many studies about applications and use of RCA but this mostly stays only at the research level. Precast concrete plants producing great amount of precast concrete element and integral part of it there are defective products which are stored on landfill. These defective products are crashed by crasher for wide fraction of recycled concrete aggregates, mostly fraction 0 – 63 mm. RCA is often used for applications with low requirements on the aggregates, for example road beds, subbase of the foundations and backfills of utilities. Recycled concrete aggregates from defective elements form precast production are classified in class A1 (content of concrete over 90%). More precisely it is 100% pure recycled concrete without any impurities and admixtures. This study presents results from testing of characteristics of RCA produced from defective elements form precast production. Following characteristics were tested: grading, shape index of coarse aggregates, content and quality of fines in fine aggregates, bulk density, water absorption and alkali-silica reaction. Results showed that the applicability of RCA produced from defective elements form precast production for new concrete is possible.

Keywords

recycled concrete aggregates (RCA), precast production, properties of RCA.

Authors

NOVÁKOVÁ, I.; STAVAŘ, T.

Released

22. 10. 2015

ISBN

9786066853125

BibTex

@misc{BUT117839,
  author="Iveta {Nováková} and Tomáš {Stavař}",
  title="CHARACTERISTICS OF RECYCLED CONCRETE AGGREGATES MADE OF DEFECTIVE ELEMENTS FORM PRECAST PRODUCTION",
  year="2015",
  isbn="9786066853125",
  note="abstract"
}