Umhla wokuPoswa:10,Epreli,2023

(1) Impembelelo kumxube wekhonkrithi

I-arhente yamandla yangaphambili inokunciphisa ixesha lokubeka ikhonkrithi, kodwa xa umxholo we-tricalcium aluminate kwisamente uphantsi okanye ungaphantsi kunegypsum, i-sulfate iya kulibazisa ixesha lokumisela isamente. Ngokuqhelekileyo, umxholo womoya kwikhonkrithi awuyi kunyuswa yi-admixture yamandla okuqala, kwaye umxholo womoya we-admixture yokunciphisa amanzi ngokukhawuleza unqunywe ngumxholo womoya wokunciphisa amanzi admixture. Umzekelo, umxholo werhasi awuyi kunyuka xa udityaniswe ne-calcium sugar water reducer, kodwa iya kwanda kakhulu xa idityaniswe ne-calcium wood reducer water.

(2) Impembelelo kwikhonkrithi

I-arhente yamandla yangaphambili inokuphucula amandla ayo okuqala; Iqondo lophuculo lwe-ejenti yamandla angaphambili ixhomekeke kubungakanani be-arhente yamandla kwangethuba, ubushushu be-ambient, iimeko zokunyanga, umlinganiselo wesamente yamanzi kunye nohlobo lwesamente. Impembelelo kumandla wexesha elide lekhonkrithi ayihambelani, kunye nephezulu kwaye iphantsi. I-arhente yamandla yangaphambili inesiphumo esihle kuluhlu olufanelekileyo lwedosi, kodwa xa idosi inkulu, iya kuba nefuthe elibi kumandla amva kunye nokuqina kwekhonkrithi. Amandla okunciphisa amanzi kwangoko anesiphumo sakomelela kwangethuba, kwaye ukusebenza kwawo kubhetele kune-arhente yamandla asekuqaleni, enokulawula utshintsho lwamandla kade. I-Triethanolamine inokuvuselela amandla okuqala e-samente. Inokukhawulezisa i-hydration ye-tricalcium aluminate, kodwa ilibazise ukuhanjiswa kwe-tricalcium silicate kunye ne-dicalcium silicate. Ukuba umxholo uphezulu kakhulu, amandla ekhonkrithi aya kuncitshiswa.

I-sulfate ehlala ixesha elide i-ejenti yamandla yakuqala ayinayo impembelelo kwi-corrosion yokuqinisa, ngelixa i-chloride i-ejenti yamandla yakuqala iqulethe inani elikhulu le-chloride ion, eya kukhuthaza ukuqinisa ukubola. Xa idosi inkulu, ukuxhathisa ukubola kweekhemikhali, ukumelana nokunxiba kunye nokumelana neqabaka nako kuya kuncitshiswa. Kwikhonkrithi, ukunciphisa amandla e-flexural yekhonkrithi kunye nokwandisa i-shrinkage yokuqala yekhonkrithi kunempembelelo encinci kwinqanaba lokugqibela lekhonkrithi. Okwangoku, ukusetyenziswa kwe-chloride-containing additives kunqatshelwe kumgangatho omtsha wesizwe. Ukuze kuthintelwe umphumo wetyuwa ye-chloride kwi-corrosion yokuqinisa, i-rust inhibitor kunye ne-chloride ityuwa zihlala zisetyenziswa kunye.

Xa usebenzisa i-sulfate arhente yamandla ekuqaleni, iya kwandisa ialkalinity yesigaba solwelo lwekhonkrithi, ngoko kufuneka kuqatshelwe ukuba xa i-aggregate iqulethe i-silica esebenzayo, iya kukhuthaza ukusabela phakathi kwealkali kunye ne-aggregate, kwaye ibangele ukuba ikhonkrithi yonakaliswe ngenxa yealkali. Ukwandiswa.