PROPOSAL OF A NEW APPROACH FOR DETERMINATION OF PORE CONTINUITY AND SUITABLE INTRUSION PRESSURE BASED ON STEP-BY-STEP MERCURY INTRUSION POROSIMETERY TEST
Hardened cementitious materials consist of various kinds of pores, like gel pores, capillarypores, air voids and so on, whose size and shape distribution is often called pore structure.However, Ink-bottle relations are most characteristic pore structure of cementitious materialsand govern drying shrinkage or ion absorption. Mercury intrusion porosimetry (MIP) test isone of the most widely used methods to study the pore structure of cementitious materials.However, it is well known that the evaluation of pore structure by MIP is not totally accurate.The main reasons are the ink-bottle effect and the destruction of pores due to excessive highpressure. A unique method that can be used to determine volumes of continuative pore anddiscontinuative pore structure is proposed. Furthermore, according to this method, a suitablemaximum intrusion pressure can be selected. In this study, boundary pore between capillaryand gel pores is found using the results of the proposed method.
Pore structure Mercury Intrusion Porosimetry Ink-bottle Continuative pores Discontinuative pores Dead-end pores Boundary pores
R.Yoshida T.Kishi
Depts.of Civil Engineering,University of Tokyo,Japan Institute of Industrial Science,University of Tokyo,Japan
国际会议
南京
英文
1455-1464
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）