Abstract:
Indasitiri yekuvaka inoita basa guru mukuumba nyika yemazuva ano, iyo simende ndiyo chivako chikuru.Kwemakore, vaongorori uye mainjiniya vakaramba vachitsvaga nzira dzekuvandudza kunaka uye kushanda kwesimende.Imwe nzira inovimbisa inosanganisira kuwedzera kwekuwedzera, iyo calcium formate yakave mutambi anozivikanwa.
suma:
Simende chinhu chakakosha pakuvaka uye inoda kuramba ichivandudzwa kuti isangane nekuchinja kuri kuita indasitiri.Kuwedzerwa kwezvinowedzera kwakaratidza kuva nzira inoshanda yekuvandudza zvakasiyana-siyana zvesimende.Calcium formate, komboni inogadzirwa nekuita kwecalcium oxide uye formic acid, yakwezva kutarisisa kugona kwayo kuvandudza zvimiro zvesimende.Ichi chinyorwa chine chinangwa chekujekesa nzira idzo calcium inoumba zvakanaka inokanganisa simende kunaka uye kushanda.
Calcium formate chemical properties:
Usati wanyura mumhedzisiro ye calcium formate pane simenti, zvakakosha kuti unzwisise chemistry yeichi chinowedzera.Calcium formate ichena crystalline poda ine kemikari formula Ca(HCOO)2.Inonyungudika mumvura uye ine hygroscopic properties.Iyo yakasarudzika musanganiswa we calcium uye formate ions inopa iyo kompani chaiyo zvivakwa, ichiita kuti ive yakakodzera kune akasiyana maapplication, kusanganisira kuvandudza simende.
Mechanism:
Iko kubatanidzwa kwecalcium formate mumasanganiswa esimende kunosuma nzira dzinoverengeka dzinobatsira mukuvandudza kushanda.Imwe nzira huru inosanganisira accelerated simenti hydration.Calcium formate inoshanda sechinhu chinokonzeresa, ichikurudzira kuumbwa kwemahydrates akadai se calcium silicate hydrate (CSH) uye ettringite.Uku kukwidziridzwa kunoguma nekukurumidza kuseta nguva uye kuwedzera kwekutanga simba kukura.
Uyezve, calcium formate inoshanda senge nucleation saiti yekunaya kwe hydrate, inokanganisa iyo microstructure ye simenti matrix.Uku kugadziridzwa kunoguma muine denser uye yakawanda yunifomu hydrate kugovera, kubatsira kuvandudza kusimba uye kuderedza permeability.
Uyezve, calcium formate inotora chikamu mupozzolanic reaction, iyo inopindirana ne calcium hydroxide kuumba imwe CSH gel.Kuita uku hakungobatsiri kukura kwesimba asiwo kunoderedza njodzi yekunonoka kuumbwa kwe ettringite (DEF), chiitiko chinogona kukanganisa kusimba kwenguva refu kwesimende.
Kuvandudza kunaka kwesimende:
Early Strength Development:
Iko kugona kwecalcium formate kumhanyisa simende hydration inoshandura mukuvandudza kwakakosha mukukura kwesimba rekutanga.Izvi zvakakosha kumapurojekiti ekuvaka uko simba rinoda kuwanikwa nekukurumidza.Iyo yekumisikidza yekuseta nguva inosimudzirwa necalcium formate inogona kukonzera nekukurumidza kubviswa kwefomu uye nekukurumidza kufambira mberi kwekuvaka.
Enhanced durability:
Calcium formate inowedzerwa kushandura simenti microstructure, zvichiita kuti igare yakasimba.Kuwedzera kuwanda uye kugovera kwakafanana kwemahydrates kunobatsira kuwedzera kuramba kurwiswa kwemakemikari, kutonhora-kunyorova kutenderera, uye kupfeka.Naizvozvo, chimiro chesimende inobatwa necalcium formate inoratidza hupenyu hurefu hwebasa.
Deredza permeability:
Chimwe chezvinhu zvakakosha zvinokanganisa kusimba kwekongiri ndiko kugona kwayo.Calcium formate inoderedza kupera nekukanganisa chimiro chepore chemasimende matrix.Kuumbwa kwedense matrix ane maburi akakwenenzverwa kunoganhurira kupinda kwemvura uye zvinhu zvine hutsinye, nokudaro zvichisimudzira kuramba kwekongiri pakuora.
Kuderedza Alkali Silica Reaction (ASR):
Zvidzidzo zvakawana kuti calcium formate inogona kuderedza njodzi yealkali-silica reaction, maitiro anokuvadza anogona kukonzera kuzvimba gel kuumbwa uye kuputika mukongiri.Nekukanganisa chimiro chepore uye kuumbwa kwemakemikari esimende slurry, calcium formate inobatsira kuderedza mukana wekukuvara kwakabatana neASR.
Mafambiro ekuwedzera:
Kuvandudza machinability:
Mhedzisiro yecalcium formate pane simenti hydration ine mhedzisiro yakanaka pakushanda kwekongiri nyowani.Yakakurumidza kuseta nguva uye yakakwidziridzwa hydration kinetics inobatsira kuvandudza kuyerera maitiro, kufambisa kuiswa uye kubatanidzwa kwekongiri.Izvi zvinonyanya kubatsira apo kureruka kwekuiswa kwakakosha.
kudzora tembiricha:
Kushandiswa kwecalcium formate mu simenti kunobatsira kudzikisira mhedzisiro yekupisa kwakanyanya panguva yekurapa.Kumhanyisa nguva yekumisikidza kunokonzeresa calcium formate kunogona kukurumidzira kukura kwesimba uye kuderedza kusadzika kwekongiri kumatambudziko ane chekuita netembiricha akadai sekuputika kwemafuta.
Sustainability kufunga:
Calcium formate ine zvivakwa zvinosangana nezvinangwa zvekusimudzira zveindasitiri yekuvaka.Yayo pozzolanic reactivity inofambisa kushandiswa kwezvinhu zvinorasa, uye kukanganisa kwayo pakusimba uye hupenyu hurefu hunobatsira mukudzikisira kwese kwekukanganisa kwezvakatipoteredza zvine chekuita nekutsiva nekugadzirisa zvimiro zvekuchembera.
Matambudziko uye kufunga:
Nepo mabhenefiti ekubatanidza calcium formate mu simenti akajeka, zvinogona kunetsa uye zvisingakwanisi zvinofanirwa kutariswa.Izvi zvinogona kusanganisira kuwedzera kwemutengo, kusangana kungangoitika nemamwe masanganiswa, uye kudiwa kwekuchenjerera kudzora dosi kudzivirira kukanganisa.Pamusoro pezvo, kuita kwenguva refu uye kusimba kwecalcium formate-yakarapwa kongiri pasi pemamiriro ekunze anotendera kumwe kutsvagisa uye zvidzidzo zvemumunda.
mukupedzisa:
Kubatanidza calcium formate musimende inzira inovimbisa yekuvandudza kunaka uye kushanda kwechinhu ichi chakakosha chekuvaka.Kuburikidza nemaitiro ayo akawanda ekuita, calcium formate inomhanyisa hydration, inovandudza microstructure uye inobatsira kune zvakasiyana-siyana zvinodikanwa zvivakwa, zvinosanganisira kusimudzira kwesimba rekutanga, kusimba kwakawedzera uye kuderedzwa kupenya.Sezvo indasitiri yekuvaka ichiramba ichishanduka, basa rezvinowedzera senge calcium formate mukugadzirisa simende zvivakwa zvinogona kuwedzera kukosha.Kuwedzera kutsvagisa uye mashandisirwo anoshanda pasina mubvunzo anozoratidza kugona kwakazara uye kwakanyatso kushandiswa kwecalcium formate mukugadzira simende, ichigadzira nzira yekuwedzera kusimba uye kusimba zvimiro.
Nguva yekutumira: Zvita-05-2023