Ndeapi marudzi eretarders?

Retarders makemikari anowedzera anonotsa kudzika kana kuoma kwe simenti. Iwo anoshandiswa mukongiri kunyorera uko kunonoka kugadzika kunodiwa, senge mukupisa kwemamiriro ekunze, kana kana yakawedzera kusanganisa kana nguva yekuisa inodiwa. Kune akati wandei marudzi eretarders aripo, imwe neimwe iine yayo seti yezvivakwa uye mabhenefiti. Heano mamwe emhando dze retarders:

1. Organic Acids: Organic acids yakadai secitric, tartaric, uye gluconic acid inowanzoshandiswa seretarders mune sement-based materials. Vanoshanda kuburikidza nekuita neraimu yakasununguka mu simenti, iyo inoderedza hydration process. Organic acid retarders kazhinji isiri-chepfu uye inoora, zvichiita kuti ive sarudzo ine hushamwari.
2. Shuga: Shuga dzakadai seglucose, sucrose, uye fructose zvinogonawo kushandiswa seretarders mune simende-based materials. Vanoshanda nekusunga pamusoro pemasimende, izvo zvinoderedza hydration process. Shuga retarders inowanzoshandiswa pamwe chete nemamwe mareta kuti ape nguva yakarongeka yakarongeka.
3. Inorganic Salts: Inorganic salts yakadai seborax, zinc sulfate, uye sodium silicate inowanzoshandiswa seretarders mune sement-based materials. Vanoshanda nekugadzira firimu rakaonda pamusoro pemasimende, izvo zvinoderedza hydration process. Inorganic salt retarders inowanzoshandiswa pamwe chete neorganic acid kana shuga retarders kuti ipe nguva inopindirana uye inofanotaurwa.
4. Lignosulfonates: Lignosulfonates ndiwo mapolymeri echisikigo anotorwa kubva muhuni pulp. Izvo zvinowanzoshandiswa seretarders mune sement-based materials, sezvavanoshanda nekusunga pamusoro pemasimiti uye kuderedza hydration process. Lignosulfonate retarders inowanzo shanda mune yakakwira-alumina simenti pane yakajairika Portland simende.
5. Hydroxycarboxylic Acids: Hydroxycarboxylic acids segluconic uye citric acid anowanzo shandiswa seretarders mune simende-based materials. Vanoshanda nekucheka iyo yemahara calcium ions mu simenti, iyo inoderedza hydration process. Hydroxycarboxylic acid retarders inowanzoshandiswa pamwe chete nemamwe maretader kuti ipe nguva inowirirana uye inofanotaurwa.
6. Polycarboxylate Ether (PCE) Superplasticizers: PCE superplasticizers inowanzoshandiswa seretarders mumashandisirwo ekongiri uko kunonoka kumisa nguva kunodiwa. Vanoshanda nekuparadzira zvimedu zvesimende uye kuderedza kushushikana kwepamusoro pemvura, izvo zvinoderedza hydration process. PCE retarders inowanzoshandiswa pamwe chete nemamwe ma-superplasticizers kuti ape nguva yakawanda inowirirana uye inofanotaurwa.

Mukupedzisa, retarders chinhu chakakosha chesimende-yakavakirwa zvinhu, sezvo ichipa yakawedzera kudzora nguva yekumisikidza uye inogona kubatsira kuvandudza kushanda kwezvinhu. Mhando ye retarder inoshandiswa ichaenderana neiyo chaiyo application uye inodiwa yekumisikidza nguva, pamwe nemidziyo ye simenti uye zvimwe zvinowedzera zvinoshandiswa. Nekusarudza iyo chaiyo mhando yekudzoreredza, makondirakiti uye mainjiniya vanogona kuona kuti yavo-yakavakirwa simende yakasimba, yakasimba, uye inoita zvakanaka nekufamba kwenguva.