Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7884468 | Cement and Concrete Research | 2018 | 12 Pages |
Abstract
Concrete drying shrinkage is a major practical problem, but it can be ameliorated by means of “shrinkage-reducing agents” (SRAs). Water vapor sorption isotherms and low temperature DSC measurements suggest that alcohol-ethylene oxide polymers (AEOPs) with a better hydrophilic-lipophilic (HL-) balance are present in meso-pores in which water molecules evaporate from 75% RH to 40% RH. Short-term drying shrinkage measurements show that the better HL-balanced AEOPs reduce irreversible shrinkage, which occurs mainly from 75% RH to 40% RH during the first drying. Based on the similarity between corresponding RH regions, it is concluded that the better HL balanced AEOP in relevant meso-pores hinders agglomeration of C-S-H during the first desorption to mitigate the irreversible shrinkage and reduce the first drying shrinkage.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Ippei Maruyama, Ellis Gartner, Katsutoshi Beppu, Ryo Kurihara,