Umhla wokuThumela:19,Sep,2022
I-Retarder yi-admixture enokuthintela i-hydration ye-samente kwaye yandise ixesha lokuguqulwa komxube ukusuka kwiplastiki ukuya kwimeko enzima. Ngoko ke, ingasetyenziselwa kwikhonkrithi yezorhwebo ukuphucula ukugcinwa kwe-slump yekhonkrithi. Kuyimfuneko kwikhonkrithi yorhwebo. izithako zomxube.
Enyanisweni, indima ye-retarders ingaphezulu kakhulu kunokuphucula iplastiki yekhonkrithi yorhwebo.
(1) Uninzi lwee-retarders lunomsebenzi othile wokwenza iplastiki, yaye ezinye ii-retarders zinempembelelo yokunciphisa amanzi ngaphaya kwezo zisetyenziswa ngokuqhelekileyo iiplasticizers. Uvavanyo lubonise ukuba umphumo wokunciphisa amanzi we-sodium gluconate esetyenziswa ngokuqhelekileyo ngamaxesha amaninzi kune-naphthalene-based superplasticizers. yaziwa. Ngethuba lokwakhiwa kweqondo lokushisa eliphezulu, ukwandisa umthamo we-sodium gluconate, iindleko zokwakha aziyi kunyuka, kuba i-dosage ye-arhente yokunciphisa amanzi ehambelanayo ingancitshiswa kakhulu.
Enyanisweni, indima ye-retarders ingaphezulu kakhulu kunokuphucula iplastiki yekhonkrithi yorhwebo.
(1) Uninzi lwee-retarders lunomsebenzi othile wokwenza iplastiki, yaye ezinye ii-retarders zinempembelelo yokunciphisa amanzi ngaphaya kwezo zisetyenziswa ngokuqhelekileyo iiplasticizers. Uvavanyo lubonise ukuba umphumo wokunciphisa amanzi we-sodium gluconate esetyenziswa ngokuqhelekileyo ngamaxesha amaninzi kune-naphthalene-based superplasticizers. yaziwa. Ngethuba lokwakhiwa kweqondo lokushisa eliphezulu, ukwandisa umthamo we-sodium gluconate, iindleko zokwakha aziyi kunyuka, kuba i-dosage ye-arhente yokunciphisa amanzi ehambelanayo ingancitshiswa kakhulu.
Ukusetyenziswa ngokugqithiseleyo kwe-retarder kulwakhiwo lwekhonkrithi yezorhwebo akukhuthazwa. Ukusetyenziswa ngokugqithiseleyo kwe-retarder kwikhonkrithi akuyi kuchaphazela kuphela ukuphuhliswa kwamandla okuqala kwekhonkrithi, kodwa kuchaphazela inkqubela phambili yokwakha. Ngenxa yemeko yeplastiki yexesha elide yekhonkrithi, iya kubonakaliswa ngumoya kunye nelanga kwi-atmosfera, kwaye amanzi kwindawo yekhonkrithi iya kuchaphazeleka. Isixa esikhulu somphunga sinyusa ilahleko yamanzi kumphezulu wekhonkrithi, okukhokelela kwiintanda ezincinci. Njengoko ilahleko yamanzi ikhula, ukuqhekeka kuphuhla kwiindawo ezinzulu, inqanaba lolwelo lwamanzi kwi-concrete pores drops, uxinzelelo olubi oluveliswa ngokuthe ngcembe luyanda, kunye nokunciphisa okubangelwa Amandla abangela ukuba ikhonkrithi iyancipha ngenxa yokulahlekelwa kwamanzi.
Ikhonkrithi kwimeko yeplastiki ixesha elide iya kubangela ukuhlaliswa kwegazi kunye nokuguqulwa okungalinganiyo phakathi kwee-aggregates kunye nezixhobo zesamente. Ngokweemvavanyo, i-plastic shrinkage yekhonkrithi kwimeko yeplastiki ixesha elide linokufikelela kwi-1%, enempembelelo enkulu kumgangatho wekhonkrithi.
Ixesha lokuposa: Sep-19-2022
