Chemical activation of blended cements made with lime and natural pozzolans

Autor:	Robert L. Day, Caijun Shi
Rok vydání:	1993
Předmět:	Cement Chemical engineering chemistry Flake Inorganic chemistry engineering chemistry.chemical_element General Materials Science Building and Construction Pozzolan Calcium engineering.material Lime
Zdroj:	Cement and Concrete Research. 23:1389-1396
ISSN:	0008-8846
DOI:	10.1016/0008-8846(93)90076-l
Popis:	This paper deals with the chemical activation of lime-pozzolan cement (LPC), which consists of 80% natural pozzolan and 20% hydrated lime (by mass). Results show that the addition of 4% Na2SO4 can significantly improve the early strength of this cement. The presence of 4% flake calcium chloride (CaCl2.2H2O) is not helpful to early strength, but can increase the later strength substantially. CaSO4.O.5H2O and NaCl do not demonstrate an obvious effect on the strength development of the cement. Combination of activators, such as CaCl2.2H2O+Na2SO4 or Na2SO4+NaCl does not improve the activation effect; pastes with 2% Na2SO4+2% NaCl show lower strength than the pastes with 2% Na2SO4 alone.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1ebc7f0d495dbe925aabfefc9f3c880a https://doi.org/10.1016/0008-8846(93)90076-l Zobrazit plný text záznamu