A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Carbonation durability of blended cement pastes used for waste encapsulation
Abstract Blended cement pastes are currently used for encapsulation of low level and intermediate level nuclear waste in the UK. However, there is still little information on the long-term durability of those mixes to some chemical attacks. Accelerated testing may predict the long-term durability or at least help the selection of more durable formulations. In this work, blended blastfurnace slag (BFS)/Portland cement (OPC) pastes containing 60, 75 and 90% BFS and pulverised fuel ash (PFA)/OPC pastes with 40, 55 and 75% PFA were cured at 20 and 60°C for 90 days then submitted to natural and accelerated carbonation (5% CO2). The effects of the curing temperature as well as the OPC replacement level on the carbonation ratio are presented. Results showed a good correlation between natural and accelerated carbonation for the pastes studied. Carbonation was found to be governed by the amount of calcium hydroxide available in the mixes before the process started.
Carbonation durability of blended cement pastes used for waste encapsulation
Abstract Blended cement pastes are currently used for encapsulation of low level and intermediate level nuclear waste in the UK. However, there is still little information on the long-term durability of those mixes to some chemical attacks. Accelerated testing may predict the long-term durability or at least help the selection of more durable formulations. In this work, blended blastfurnace slag (BFS)/Portland cement (OPC) pastes containing 60, 75 and 90% BFS and pulverised fuel ash (PFA)/OPC pastes with 40, 55 and 75% PFA were cured at 20 and 60°C for 90 days then submitted to natural and accelerated carbonation (5% CO2). The effects of the curing temperature as well as the OPC replacement level on the carbonation ratio are presented. Results showed a good correlation between natural and accelerated carbonation for the pastes studied. Carbonation was found to be governed by the amount of calcium hydroxide available in the mixes before the process started.
Carbonation durability of blended cement pastes used for waste encapsulation
Borges, Paulo H. R. (author) / Milestone, Neil B. (author) / Costa, Juliana O. (author) / Lynsdale, Cyril J. (author) / Panzera, Túlio H. (author) / Christophoro, André L. (author)
Materials and Structures ; 45 ; 663-678
2011-10-14
16 pages
Article (Journal)
Electronic Resource
English
Carbonation durability of blended cement pastes used for waste encapsulation
| British Library Online Contents | 2012
Carbonation durability of blended cement pastes used for waste encapsulation
| Online Contents | 2012
Carbonation durability of blended cement pastes used for waste encapsulation
| Online Contents | 2011
Carbonation durability of blended cement pastes used for waste encapsulation
| Online Contents | 2011