Bentonite ndi nthaka yamchere yachilengedwe, chigawo chachikulu chomwe ndi mchere wa dongo wopangidwa ndi montmorillonite.Ndi phulusa lamapiri lopangidwa ndi kuphulika kwa mapiri, ndipo ma depositi a bentonite amapangidwa pambuyo pa kutentha, kupanikizika ndi nthawi ya metamorphic.Mitundu ya bentonite imagawidwa makamaka kukhala sodium-based bentonite ndi calcium-based bentonite.Pakati pawo, bentonite yapamwamba kwambiri ya sodium imakhala ndi makhalidwe atatu: kutupa kwakukulu, kutsika kwa madzi otsika komanso ntchito yodzichiritsa, choncho imagwiritsidwa ntchito kwambiri m'madera osiyanasiyana odana ndi seepage.
Dongo losatha madzi komanso losasunthika la bentonite ndiloyenera kuletsa kutayirako kutayira, kutsekereza madzi kumtsinje wamtsinje, dziwe loyikira madzi chotchinga, siteshoni ya sitima yapamtunda popewa kuteteza madzi ndi maziko osalowa madzi komanso kuteteza nyumba zosiyanasiyana.
Kayendetsedwe kazinthu:
(1) Kukula kwakukulu: bentonite imakula nthawi zosachepera 12 mutakumana ndi madzi, kufika nthawi 25 kuposa ASTM D5890.
(2) Kutsika kwamadzi otsika: Kuthamanga kwa madzi ndi 5 X 10-9cm / sec, komwe kumayenderana ndi ASTM D 5887 standard.
(3) Ntchito yodzichiritsa: bentonite idzakhala gel osakaniza ndi madzi, ndipo imatha kudzaza ming'alu ndi mipata.Njira yophatikizira ndi yolumikizana mwachindunji motero imalimbana ndi kukhazikika kosagwirizana.Zili ndi ntchito zotsika mtengo ndipo zimatha kugwiritsidwa ntchito kwambiri m'mapulojekiti osiyanasiyana osalowa madzi komanso odana ndi masamba.
Bentonite yopanda madzi, yosasunthika yapadera yopangidwa ndi Hebei Yiheng Technology Co., Ltd. imagwiritsa ntchito mosamalitsa muyezo wapadziko lonse wa People's Republic of China GB/T 20973--2007 ndikupanga.