Rā Whakairi:10,Apr,2023

(1) Te awe ki te ranunga raima

Ka taea e te kaihoko kaha moata te whakapoto i te wa whakarite o te raima, engari ki te iti te kiko o te tricalcium aluminate i roto i te sima, he iti iho ranei i te gypsum, ka whakaroa te wa whakaroa o te raima.Ko te tikanga, ko te hau i roto i te raima e kore e whakanuia e te whakaurunga kaha moata, a ko te ihirangi hau o te whakaurunga whakaheke-wai-a-waa ka whakatauhia e te hau o te whakaurunga whakaheke wai.Hei tauira, karekau te hau e nui ake ina whakauruhia ki te konupūmā huka huka whakaheke wai, engari ka tino piki ake ina whakauruhia ki te konupūmā rakau whakaheke wai.

(2) Paanga ki runga raima

Ka taea e te kaihoko kaha moata te whakapai ake i tona kaha moata;Ko te tohu whakapai ake o taua kaihoko kaha moata e whakawhirinaki ana ki te nui o te kaihoko kaha moata, te pāmahana ambient, nga tikanga whakaora, te ōwehenga sima wai me te momo ciment.Ko te paanga ki te kaha o te raima mo te wa roa kaore i te rite, me te teitei me te iti.He pai te painga o te kaihoko kaha moata i roto i te awhe whaitake o te inenga, engari ka nui te inenga, ka pa kino ki te kaha me te mauroa o te raima.He pai ake te kaha o te kaha o te kaha moata, a he pai ake te mahi a te kaihoko kaha moata, ka taea te whakahaere i te huringa o te kaha o te mutunga.Ka taea e Triethanolamine te whakaihiihi i te kaha wawe o te ciment.Ka taea e ia te whakatere i te whakaheke o te tricalcium aluminate, engari ka whakaroa i te hydration o te tricalcium silicate me te dicalcium silicate.Mena he tiketike rawa te ihirangi, ka heke te kaha o te raima.

Karekau he painga o te kaihoko kaha moata o te pūkawa ngawha ki te whakakaha i te waikura, i te mea he nui te nui o nga katote chloride i roto i te kaihoko kaha moata, ka whakatairanga i te waikura whakakaha.I te nui o te inenga, ka iti haere te aukati matū, te aukati mau me te haupapa.Mo te raima, ko te whakaheke i te kaha flexible o te raima me te whakanui ake i te mimiti o te raima ka iti te pa ki te waahanga o muri o te raima.I tenei wa, kua whakakorehia te whakamahi i nga taapiri kei roto i te chloride i roto i te paerewa motu hou.Hei aukati i te paheketanga o te tote hauota ki te whakakaha i te waikura, ka whakamahia ngatahi te aukati waikura me te tote pūhaumāota.

A, no te whakamahi pūkawa ngāwha māngai kaha wawe, ka whakanui i te reira i te alkalinity o te wāhanga wai raima, na me tohu te reira e ka kei roto i te whakahiato silica kaha, ka whakatairanga i te reira i te tauhohenga i waenganui i alkali me te whakahiato, a ka meinga te raima ki te kia pakaru na te alkali. roha.