LECA (Lightweight Expanded Clay Aggregate) tara ne da aka yi da yumbu mai faɗi a matsakaita 1200 ℃ a cikin kiln rotary,
Ana faɗaɗa iskar iskar gas da dubban ƙananan kumfa muddin wannan zafin jiki da porosity zai bayyana da yawa.
babu komai a ciki da saƙar zuma a waɗannan tarin sifofin zagaye lokacin da kayan narke suka zama sanyi. LECA kerarre ce
tara wanda yana da fa'idodi da yawa idan aka kwatanta da tari mai nauyi na halitta kuma tun 1917 ya yi amfani da shi a ƙarƙashin
daban-daban iri sunan a Amurka da Turai kasashen
