Ka hopena o Redispersible Emulsion Powder ma ka Slurry Structure

ʻO ka pauka latex redispersible he mea hoʻohana maʻamau i hoʻohana ʻia ma ka hoʻomaloʻo ʻana i kahi emulsion polymer me ka waiʻona polyvinyl ma ke ʻano he colloid pale.Hiki ke hoʻopuehu hou ʻia i loko o ka wai e hana i kahi emulsion ke hui ʻia me ka wai.ʻO ka hoʻohui ʻana i ka pauka latex redispersible hiki ke hoʻomaikaʻi i ka hana ʻana o ka mortar sima hou.

I ka manawa e hoʻopili ai ka mea hoʻohui me ka pauka latex i ka wai, hoʻomaka ka hopena hydration, a hiki koke ka hopena calcium hydroxide i ka saturation a ua hoʻoheheʻe ʻia nā kristal, a i ka manawa like, ua hoʻokumu ʻia nā kristal ettringite a me ka calcium silicate hydrate gels.Hoʻokomo ʻia nā ʻāpana paʻa ma luna o ka gel a me nā ʻāpana cement unhydrated.Ke hoʻomau nei ka hopena hydration, hoʻonui nā huahana hydration, a hōʻuluʻulu mālie nā ʻāpana polymer i nā pores capillary, e hana ana i kahi papa paʻa paʻa ma ka ʻili o ka gel a me nā ʻāpana sima unhydrated.Hoʻopiha mālie nā ʻāpana polymer i hoʻohui ʻia i nā pores, akā ʻaʻole loa i ka ʻili o loko o nā pores.Ke hoʻemi hou ʻia ka wai e ka hydration a i ʻole ka maloʻo ʻana, ʻo nā ʻāpana polymer i hoʻopili ʻia ma ka gel a i loko o nā pores e hui pū i loko o kahi kiʻiʻoniʻoni mau, e hana ana i kahi hui interpenetrating me ka paʻi cement hydrated a hoʻomaikaʻi i ka hydration Hoʻopaʻa ʻana o nā huahana a me nā aggregates.

No ka mea, hoʻokumu nā huahana hydration me nā polymers i kahi papa uhi ma ke kikowaena, hiki ke hoʻopilikia i ka ulu ʻana o nā kristal ettringite a me nā kristal calcium hydroxide;a no ka hoʻopili ʻana o nā polymers i nā kiʻiʻoniʻoni i loko o nā pores o ka ʻāpana hoʻololi interface, ʻoi aku ka paʻakikī o ka polymer cement-based Materials.ʻO nā pūʻulu ikaika i loko o kekahi mau molekele polymer e hoʻopuka pū i nā hopena cross-linking me Ca2 + a me A13 + i nā huahana hydration cement e hana i nā kaula alahaka kūikawā, e hoʻomaikaʻi i ke ʻano kino o nā mea hoʻopaʻa ʻia sima paʻa, hoʻomaha i ke kaumaha o loko, a hoʻemi i ka hana ʻana o nā microcracks.

I ka ulu ʻana o ka hana gel cement, pau ka wai a hoʻopaʻa ʻia nā ʻāpana polymer i loko o nā pores.E like me ka hoʻomaʻemaʻe hou ʻana o ka sima, e emi ana ka makū i loko o nā pores capillary, a hoʻohui ʻia nā ʻāpana polymer ma luna o ka ʻili o ka huahana hydration gel/unhydrated cement particle aggregate a me ka aggregate, a laila e hana ana i kahi papa hoʻopaʻa paʻa mau me nā pores nui Piha. me nā ʻāpana polymer paʻa a paʻa ponoʻī.

ʻO ka emulsion i hoʻopuehu ʻia o ka pauka latex redispersible hiki ke hana i kahi kiʻi ʻoniʻoni mau ʻole i ka wai (polymer network body) ma hope o ka maloʻo ʻana, a hiki i kēia kino haʻahaʻa modulus polymer network ke hoʻomaikaʻi i ka hana o ka sima;i ka manawa like, i loko o ka polymer mole Kekahi polar pūʻulu i loko o ka sima react chemically me ka sima hydration huahana e hana kūikawā alahaka, hoʻomaikaʻi i ke kinona o ka sima hydration huahana, a alleviate a hoemi i ka hanau o na māwae.Ma hope o ka hoʻohui ʻia ʻana o ka pauka latex redispersible, e lohi ka hydration rate mua o ka sima, a hiki i ke kiʻiʻoniʻoni polymer ke ʻāpana a i ʻole ke kāwili piha ʻana i nā ʻāpana sima, i hiki ke hoʻomaʻemaʻe piha ʻia ka sima a hiki ke hoʻomaikaʻi ʻia kona mau waiwai like ʻole.