He aha ka mea e hoʻohana ʻia ai ka cellulose ether?

ʻEtera cellulosee hoʻolōʻihi i ka manawa hoʻonohonoho o ka paʻi sima a i ʻole ka ʻupena mortar, e hoʻopaneʻe i ke kinetics hydration sima, he mea pono ia e hoʻomaikaʻi i ka manawa hana o ka mea kumu sima, hoʻomaikaʻi i ke kūlike a me ka slump sima ma hope o ka pohō, akā hiki ke hoʻopaneʻe i ka holomua o ke kūkulu ʻana, ʻoiai ma nā kūlana haʻahaʻa haʻahaʻa no ka hoʻohana ʻana i ka mortar a me ka sima.

Ma keʻano laulā, ʻo ke kiʻekiʻe o ka nui o ka cellulose ether, ʻo ka lōʻihi o ka manawa hoʻonohonoho o ka slurry sima a me ka mortar, a ʻoi aku ka maopopo o ka dynamics hydration lohi. Hiki i ka Cellulose ether ke hoʻopaneʻe i ka hydration o nā ʻāpana mineral clinker koʻikoʻi ʻo tricalcium aluminate (C3A) a me tricalcium silicate (C3S) i loko o ka sima, akā ʻaʻole like ka hopena ma kā lākou kinetics hydration. Hoʻemi nui ka Cellulose ether i ka wikiwiki o ka hopena o C3S i ka pae wikiwiki, ʻoiai no ka ʻōnaehana C3A-Caso4, hoʻolōʻihi nui ia i ka manawa induction.

Ua hōʻike ʻia nā hoʻokolohua hou aʻe e hiki i ka cellulose ether ke kāohi i ka hoʻoheheʻe ʻia ʻana o C3A a me C3S, hoʻopaneʻe i ka crystallization o ka calcium aluminate hydrated a me ka calcium hydroxide, a hoʻemi i ka nucleation a me ka ulu ʻana o CSH ma luna o ka ʻili o nā ʻāpana C3S, akā he hopena liʻiliʻi i nā kristal ettringite. Ua ʻike ʻo Weyer et al. ʻo ke kekelē o ka pani ʻana ʻo DS ke kumu nui e hoʻopilikia ana i ka hydration sima, a ʻo ka liʻiliʻi o DS, ʻoi aku ka maopopo o ka hydration sima lohi. Ma ke ʻano o ka cellulose ether e hoʻopaneʻe i ka hydration sima.

Ua manaʻoʻiʻo ʻo Sliva et al. ua hoʻonui ka cellulose ether i ka viscosity o ka hopena pore a ua pale i ka wikiwiki o ka neʻe ʻana o ka ion, a pēlā e hoʻopaneʻe ai i ka hydration o ka sima. Eia nō naʻe, ua ʻike ʻo Pourchez et al. ʻaʻole maopopo ka pilina ma waena o ka cellulose ether i hoʻopaneʻe i ka hydration o ka sima a me ka viscosity o ka slurry sima. Ua ʻike ʻo Schmitz et al. ʻaʻohe hopena o ka viscosity o ka cellulose ether i ka hydration kinetics o ka sima.

Ua ʻike pū ʻo Pourchez he paʻa loa ka cellulose ether ma lalo o nā kūlana alkaline a ʻaʻole hiki ke hoʻopili ʻia kona hydration sima lohi i ka palaho ʻana oʻEtera celluloseʻO ka adsorption paha ke kumu maoli e hoʻopaneʻe ai ka cellulose ether i ka hydration o ka sima, e hoʻopili ʻia nā mea hoʻohui organik he nui i nā ʻāpana sima a me nā huahana hydration, e pale i ka hoʻoheheʻe ʻana o nā ʻāpana sima a me ka crystallization o nā huahana hydration, a pēlā e hoʻopaneʻe ai i ka hydration a me ka condensation o ka sima. Ua ʻike ʻo Pourchcz et al. ʻo ka ikaika o ka hiki ke adsorption o nā huahana hydration a me ka cellulose ether, ʻoi aku ka maopopo o ka lohi.

Ua manaʻoʻiʻo nui ʻia ua hoʻopili nui ʻia nā molekala cellulose ether ma nā huahana hydration a kākaʻikahi ka hoʻopili ʻia ma ka pae mineral mua o ka clinker.