SlovenščinaCatalogue of Slovene clays

sample42Mala Bukovica · Inner Carniola

45.528755 14.246289

Collected by Živa Slavec, Anja Slapničar

Brickworks Mala Bukovica – Mala Bukovica · Inner Carniola
Brickworks Mala Bukovica
https://www.kamra.si/digitalne-zbirke/item/mala-bukovica.html

Mala Bukovica

In the area of Ilirska Bistrica, the Pliocene layers are of high quality and are homogeneous grey greasy clays whose thickness is up to 70 m. In the past, there were as many as 5 brickworks and in the period from 1938 to 1950, also a lignite mine. On the surface, the Pliocene layers of this area cover about 3 km2. Ilirska Bistrica is considered to be our largest site of quality clay.

Duška Rokavec

Sample 42 is clay from Mala Bukovica (Inner Carniola). The recommended firing temperature is 900–1100 °C. The beginning of sintering is at 1100–1250 °C. At 1100 °C shrinkage is 11 % and porosity 6 %.

Clay samples

  1. Sample 42 – 800 °C800 °C
  2. Sample 42 – 900 °C900 °C
  3. Sample 42 – 1000 °C1000 °C
  4. Sample 42 – 1100 °C1100 °C
  5. Sample 42 – 1200 °C1200 °C
segrevanjeheating uppriporočena temp. žganjarecommended firing temperatureszačetek sintranjathe beginning of sinteringmehčanjesofteningžganje/firing °C%%00224466881010121214141616181820202222suha glina/dry clay900 °C1000 °C1100 °C1200 °C1300 °C
  • segrevanje
    heating up
  • priporočena temp. žganja
    recommended firing temperatures
  • začetek sintranja
    the beginning of sintering
  • mehčanje
    softening
%048121620suhadry9001000110012001300°C
poroznost/porosity %skrčki/shrinkage %

Clay preparation for testing

  1. unprocessed clayunprocessed clay
  2. sifted and dried claysifted and dried clay
  3. 012341.00.20.05%grain size in mm
  4. 2.3 % = 1.0 mm2.3 % = 1.0 mm
  5. 0.2 % = 0.2 mm0.2 % = 0.2 mm
  6. 0.1 % = 0.05 mm0.1 % = 0.05 mm