Cementy Sorela i pokrewne. Cz.2: Podział cementów pokrewnych do cementu Sorela

• Autorzy: Bensted J.

Warianty tytułu

EN

Sorel and related cements. Part 2: Categorising Sorel-related cements

• Języki publikacji: PL

Abstrakty

PL

Część druga opracowania poświęcona jest cementom Sorela zawierającym, poza zasadowym chlorkiem magnezu (omówionym w części pierwszej), inne składniki, takie jak zasadowe chlorki cynku, fosforany, fosfokrzemiany, glinokrzemiany, cementy szklano-jonomerowe itd. Spoiwa te są zazwyczaj syntezowane w reakcjach typu kwas - zasada, obejmujących etapy rozpuszczania i wytrącania, których mechanizm jest często bardzo złożony. Reakcje topochemiczne na ogół nie mają miejsca po zainicjowaniu hydratacji spoiw z grupy cementów Sorela, w przeciwieństwie do cementów portlandzkich. Większość tych materiałów wykazuje tendencje do błyskawicznego wiązania i twardnienia, znajdują więc zastosowanie w takich dziedzinach jak dentystyka, czy prace naprawcze w pewnych szczególnych, niszowych aplikacjach, gdzie potrzebne są niewielkie ilości materiału. Reakcje zachodzące z udziałem tych cementów dyskutuje się w miarę potrzeby, gdy wymagane są na ich temat szczegółowe informacje.

EN

Part 2 describes Sorel-related cements, including oxychlorides other than magnesium (discussed in Part 1) such as calcium and zinc, various oxysulphates, phosphates, silicophosphates, aluminosilicates, glass ionomer cements etc. These cements are normally produced by acid-base reactions involving dissolution and precipitation that are sometimes very complex. Topotactic reactions are not usually encountered with Sorel-related cements (in contrast to Portland cements) after the hydration reactions have been initiated. Most Sorel related cements tend to give quick setting and rapid-hardening properties and find application generally in small quantities in areas like dentistry, rapid repair work or specialist niche cementing jobs. The chemical reactions are discussed where the information is readily available.

Słowa kluczowe

PL

cement Sorela; tlenochlorek wapnia; tlenochlorek cynku; tlenochlorek glinu; fosforan amonowo-magnezowy; cement fosforanowy; fosforan magnezu; fosforan wapniowy; cement krzemianowo-fosforanowy; cement magnezowy; cement szklano-jonomerowy

EN

Sorel cement; calcium oxychloride; zinc oxychloride; aluminium oxychloride; magnesia ammonium phosphate; phosphate cement; magnesium phosphate; calcium phosphate; silicophosphate cement; magnesia cement; glass-ionomer cement

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2008
• Tom: R. 13/75, nr 6
• Strony: 299--314
• Opis fizyczny: Bibliogr. 37 poz.

Twórcy

autor

Bensted J.

• Materials Chemistry Centre, UCL, London

Bibliografia

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