SlovenščinaCatalogue of Slovene clays

sample02Boreci · the Prlekija region

46.550527 16.128582

Collected by Saša Žuman

Two Types of Clay in Žuman's Landfill – Boreci · the Prlekija region
Two Types of Clay in Žuman's Landfill
Photo Saša Žuman

The clay pit Boreci

The clay pit is located in Boreci near the settlement of Križevci pri Ljutomeru. The clay has been used for the production of roofing tiles since the start of the brickworks in Boreci. It is composed of three layers, namely: a loam, then gray clay and the lowest layer contains black clay, which is not dug out in order to protect drinking water. The clay from the Boreci clay pit, which is used for making bricks and roofing tiles, has the highest quality in Europe.

Saša Žuman

Sample 02 is clay from Boreci (the Prlekija region). The recommended firing temperature is 900–1100 °C. The beginning of sintering is at 1100–1250 °C. At 1100 °C shrinkage is 12 % and porosity 5 %.

Clay samples

  1. Sample 02 – 800 °C800 °C
  2. Sample 02 – 900 °C900 °C
  3. Sample 02 – 1000 °C1000 °C
  4. Sample 02 – 1100 °C1100 °C
  5. Sample 02 – 1200 °C1200 °C
  6. Sample 02 – 1300 °C1300 °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. 3 % = 1.0 mm3 % = 1.0 mm
  5. 3 % = 0.2 mm3 % = 0.2 mm
  6. 0.1 % = 0.05 mm0.1 % = 0.05 mm