Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Robert L. Day"'
Autor:
Juan José Dopico, Fernando Martirena Hernandez, Robert L Day, Bernhard Middendorf, Matthias Gehrke, Lesday Martinez
Publikováno v:
Revista de Ingeniería de Construcción, Vol 23, Iss 3, Pp 171-178 (2008)
La alta resistencia y durabilidad alcanzada en los hormigones de alta y ultra alta resistencia está asociada a la obtención de una matriz muy densa, definida a partir del uso de altos volúmenes de adiciones minerales muy finas, tales como las ceni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::6737481ad1ef4ebf3c484ccf13c0350f
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-50732008000300005
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-50732008000300005
Autor:
Matthias Gehrke, Robert L. Day, Pablo Roque, Sergio Betancourt, Fernando Martirena, Lesday Martinez, Bernhard Middendorf
Publikováno v:
Cement and Concrete Research. 36:1056-1061
The ashes of agricultural wastes from the processing of sugar cane are recognized as having pozzolanic properties. Burning of these wastes under controlled conditions, e.g. temperature and residence time results in significant improvement in reactivi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de964f08d20818cc3ce110f7c11e2b9e
https://doi.org/10.1016/j.cemconres.2006.03.016
https://doi.org/10.1016/j.cemconres.2006.03.016
Autor:
Robert L, Day
Publikováno v:
Pharmacy in history. 55(1)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::366d0993c2e1a6f6a2befab2b7bcb0ab
https://pubmed.ncbi.nlm.nih.gov/25134371
https://pubmed.ncbi.nlm.nih.gov/25134371
Autor:
Caijun Shi, Robert L. Day
Publikováno v:
Cement and Concrete Research. 31:813-818
This paper compares three methods for the activation of pozzolanic reactivity of a natural pozzolan: (1) prolonged grinding of natural pozzolans (mechanical method), (2) elevated temperature curing of cement pastes containing a pozzolan (thermal meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3df392f0293661adf4e53c0fff76f643
https://doi.org/10.1016/s0008-8846(01)00481-1
https://doi.org/10.1016/s0008-8846(01)00481-1
Autor:
Caijun Shi, Robert L. Day
Publikováno v:
Cement and Concrete Research. 30:607-613
This study has examined the effect of activators (Na2SO4 and CaCl2) on pozzolanic reaction kinetics in a lime-pozzolan blend, which consists of 80% ground volcanic ash and 20% hydrated lime, at 23, 35, 50, and 65°C. The addition of 4% Na2SO4 increas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19e6be2140b3977e4a831240817ac5e1
https://doi.org/10.1016/s0008-8846(00)00214-3
https://doi.org/10.1016/s0008-8846(00)00214-3
Autor:
Robert L. Day, Caijun Shi
Publikováno v:
Cement and Concrete Research. 25:1333-1346
This paper examines the early hydration of alkali-slag cements activated by different sodium compounds, such as NaOH, Na2CO3, Na2SiO3.5H2O, Na3PO4, Na2HPO4 and NaF, at 25 and 50 °C. A conduction calorimeter was used to monitor hydration kinetics. It
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa8d07914c66b72f84d4ff430f74a83b
https://doi.org/10.1016/0008-8846(95)00126-w
https://doi.org/10.1016/0008-8846(95)00126-w
Autor:
Robert L. Day, Caijun Shi
Publikováno v:
Cement and Concrete Research. 25:15-21
Experiments were performed to determine the effect of various chemical activators on strength of lime fly-ash pastes manufactured with two types of fly ash — a low calcium subbituminous ash (LFA) and a high calcium subbituminous ash (HFA). The stre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54d88611c1dd6727a2ed8aa53d15b03b
https://doi.org/10.1016/0008-8846(94)00107-a
https://doi.org/10.1016/0008-8846(94)00107-a
Autor:
Caijun Shi, Robert L. Day
Publikováno v:
Cement and Concrete Research. 24:463-472
This paper deals with the effect of initial curing conditions on the hydration process of Portland pozzolan cements. Experiments were performed on pastes made with Canadian Standards Association (CSA) Type 10 (ASTM Type I) Portland cement (PC) and Po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22825f786bd1665776993b21727ff8e7
https://doi.org/10.1016/0008-8846(94)90133-3
https://doi.org/10.1016/0008-8846(94)90133-3
Autor:
Robert L. Day, Caijun Shi
Publikováno v:
Cement and Concrete Research. 24:1485-1491
The fineness of a cement is an important factor affecting the rate of strength development. This paper examines the importance of the fineness of natural pozzolans to the strength development of lime-pozzolan cements (LPCs). A natural pozzolan from B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80e68760e17e83db65e5f06245d5772b
https://doi.org/10.1016/0008-8846(94)90162-7
https://doi.org/10.1016/0008-8846(94)90162-7
Autor:
Robert L. Day, Caijun Shi
Publikováno v:
Cement and Concrete Research. 23:1389-1396
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 ceme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ebc7f0d495dbe925aabfefc9f3c880a
https://doi.org/10.1016/0008-8846(93)90076-l
https://doi.org/10.1016/0008-8846(93)90076-l