1. Mhedzisiro yesamende shanduko inobatwa ne admixtures

Iyo yakapfuura kaviri-layer maonero anogona kunyatso kutsanangura iyo plasticizing maitiro ekuwedzera mvura inoderedza kune kongiri. Kune iwo makongiri akasanganiswa neakasiyana kongiri ekuwedzera, kunyangwe huwandu hwesimende inoshandiswa hwakadzikiswa kusvika kumwero wakati, huwandu hwemvura inodzikisira yakawedzerwa yakapetwa kaviri yekongiri yakajairika. Ichi chikamu chetsvagurudzo chinofanira kukwezva kutarisa kwevashandi vakakodzera. Uye zvakare, mune mamwe ma-ultra-high-simba makongiri, iyo simba uye simba shanduko maitiro ekongiri yakagadzirwa neakasiyana superplasticizers akasiyana. Chikonzero chechiitiko ichi chinofanira kunge chakanyatsoenderana nemhedzisiro yevanoita surfactants pane simenti hydration. Iko-kuyerera kwekrete ine mvura-sement ratio yakasanganiswa neplasticizers icharatidza chiitiko che "plate" maminitsi gumi mushure mekusanganiswa, ndiko kuti, mushure mokunge kongiri ichiputsika, ichakurumidza kuratidza chiitiko chenhema chekugadzirisa kana chisina kubvongodzwa, uye konkrete yakaderera inenge yakaoma. Nekudaro, chiitiko ichi hachisi pachena mune zvakajairwa kongiri musanganiswa pasina plasticizers. Nzira yekudzivisa uye kutsanangura dambudziko iri zvakakodzera kukurukura.

2. Kuchinja kwe simenti kunokanganiswa ne admixtures

Muchiitiko chaicho chekuvaka, dambudziko rakadaro rinowanzoitika, ndiko kuti, pasi pemusanganiswa wakafanana reshiyo, admixture chipimo chemushonga uye mamiriro ekuvaka, mhando uye batch esimende kana admixtures kuchinja, zvichikonzera musiyano mukuru mu fluidity uye kudonha kwekongiri yakagadziriswa. Chikonzero chikuru chechiitiko ichi ndechekuti zvinhu zvakaita sesimende yemaminerari ekuumbwa, yakamisikidzwa gypsum uye simende yakanaka inotungamira mukumisikidza nekukurumidza panguva yekusanganiswa kwekongiri. Naizvozvo, chidzidzo chakazara chedambudziko resamende kuchinjika kunobatsira kune zvine musoro kubata kwekushandisa nzira uye dosage yeadhimixtures.

3. Pesvedzero yenzvimbo yekushandisa pane mhedzisiro yezvisanganiswa

Kune avo concretes vane differential plasticizers, kana tembiricha kwezvakatipoteredza kwakakodzera, slump uye slump kurasikirwa kongiri zviri zvikuru nani pane anowanikwa pasi tembiricha uye yakaoma mamiriro ezvinhu, asi kana munguva yechando, kongiri haina mutsauko mukuru, izvo zvichakanganisa basa rekuvaka kusvika pamwero wakati.