Effect of Cement Type on Autogenous Deformation of Cement-Based Materials

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Title: Effect of Cement Type on Autogenous Deformation of Cement-Based Materials

Author(s): P. Lura, Y. E. Guang, and K. van Breugel

Publication: Special Publication

Volume: 220

Issue:

Appears on pages(s): 57-68

Keywords: autogenous deformation; cement paste; modeling; self-desiccation

Date: 3/1/2004

Abstract:
In this paper, measurements of non-evaporable water content, chemical shrinkage, autogenous deformation, internal relative humidity (RH), pore solution composition, and early-age elastic modulus are presented and discussed. All experiments were performed on Portland cement and blast-furnace slag (BFS) cement pastes. Self-desiccation shrinkage of the BFS cement paste was modeled based on the RH measurements, following the capillary-tension approach. The main findings of this study are: 1) self-desiccation shrinkage can be related to self-desiccation both for Portland and for BFS cement pastes, taking into account the influence of the dissolved salts in the pore solution, 2) the BFS cement paste studied shows pronounced self-desiccation and self-desiccation shrinkage, mainly caused by its very fine pore structure.