@inproceedings{oai:kutarr.kochi-tech.ac.jp:00001154,
 author = {SAKAI, Yuya and KISHI, Toshiharu},
 book = {Society for Social Management Systems Internet Journal},
 month = {May},
 note = {The objectives of this paper are to understand expansive concrete by discussing the mechanism of unique behaviors and to propose appropriate way to use expansive additive so that average engineers can utilize it properly. First, the mechanism of nonlinear behavior of expansive concrete is discussed. From the observations of fracture surface of cement paste specimen, it’s confirmed that one of the causes of the nonlinear behavior is micro cracking due to strain variation introduced by expansive action since micro cracking causes plastic deformation and stiffness reduction. Experiments using different types of gravel and their strain during volumetric expansion indicate that another cause of the nonlinear behavior is the debonding on the gravel surface. Debonding on the rebar surface is also confirmed in the test using reinforced cement paste specimen with expansive additive. The debonding on rebar, however, is prevented by using gravel since gravel changes strain distribution in the specimen. It can be said that using gravel and deformed bar constrain debonding on the rebar surface in chemically prestressed concrete. Based on the above results, some points which should be kept in mind when using expansive additive are pointed out.},
 publisher = {Society for Social Management Systems},
 title = {Mechanism Clarification and Knowledge Formation of Unique Behavior of Chemically Prestressed Concrete for Efficient Use of Expansive Concrete},
 volume = {8},
 year = {2012}
}