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Pore structure characterisation of GGBS/OPC grouts using solvent techniques
Solvent exchange has been proposed as a suitable method to dry cement paste samples for pore structure analysis and to simultaneously yield diffusion coefficients. The success of this depends on the solvent exchange process being one of simple counter diffusion. GGBS/OPC grouts have been immersed in...
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Published in: | Cement and concrete research 1994, Vol.24 (7), p.1255-1266 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Solvent exchange has been proposed as a suitable method to dry cement paste samples for pore structure analysis and to simultaneously yield diffusion coefficients. The success of this depends on the solvent exchange process being one of simple counter diffusion. GGBS/OPC grouts have been immersed in both methanol and propan-2-ol and weight loss and length change data collected. Pore size distributions have been determined using a comparative solvent adsorption technique. The results suggest that the exchange process generates vacated pore space yielding anomalous weight and length changes to preclude the determination of diffusion coefficients. The degree of this behaviour is a function of GGBS/OPC ratio, curing and solvent. It is likely that solvent exchange alters the microstructure of the grouts such that unique representations of the pore structure are unobtainable. |
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ISSN: | 0008-8846 1873-3948 |
DOI: | 10.1016/0008-8846(94)90110-4 |