A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microstructure and microanalysis of some ancient building materials
In order to assess the very long term of durability of modern Portland cements for encapsulating certain types of radioactive waste, the microstructure and microanalysis of concretes of various ages made from such cements are compared with those from similar materials of ancient origins with ages upto 2500 years used in early Greek, Roman and British Construction. Most of the historical 'concretes' examined were heavily carbonated and at best showed only traces of the calcium silicate hydrate (C-S-H) phase, the heart of modern Portland Cement concretes. The notable exception was the 1700 years old concrete from Hadrian's Wall - the mortar in this was rich in C-S-H. The modern concrete samples, from 10 to 140 years old, showed little carbonation and their compositions of the C-S-H phase were very similar to those found from Hadrian's Wall. From all the evidence examined, it is concluded that the C-S-H phase is capable of surviving intact for several thousands of years in the absence of external chemical attack. (author). (Atomindex citation 21:011436)
Microstructure and microanalysis of some ancient building materials
In order to assess the very long term of durability of modern Portland cements for encapsulating certain types of radioactive waste, the microstructure and microanalysis of concretes of various ages made from such cements are compared with those from similar materials of ancient origins with ages upto 2500 years used in early Greek, Roman and British Construction. Most of the historical 'concretes' examined were heavily carbonated and at best showed only traces of the calcium silicate hydrate (C-S-H) phase, the heart of modern Portland Cement concretes. The notable exception was the 1700 years old concrete from Hadrian's Wall - the mortar in this was rich in C-S-H. The modern concrete samples, from 10 to 140 years old, showed little carbonation and their compositions of the C-S-H phase were very similar to those found from Hadrian's Wall. From all the evidence examined, it is concluded that the C-S-H phase is capable of surviving intact for several thousands of years in the absence of external chemical attack. (author). (Atomindex citation 21:011436)
Microstructure and microanalysis of some ancient building materials
A. J. Majumdar (author) / D. L. Rayment (author) / K. Pettifer (author)
1988
35 pages
Report
No indication
English
Radioactive Wastes & Radioactivity , Radiation Shielding, Protection, & Safety , Ceramics, Refractories, & Glass , Materials Degradation & Fouling , Physical & Theoretical Chemistry , Education, Law, & Humanities , Archaeological Specimens , Concretes , Radioactive Waste Disposal , Encapsulation , Microanalysis , Microstructure , Foreign technology , Long term effects , Chemical radiation effects , EDB/052002
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