JCI Annual Convention in HAKATA

Presentation information

第38回コンクリート工学講演会

A.Material & Construction » Durability

Durability Ⅲ

Fri. Jul 8, 2016 1:15 PM - 3:30 PM Room 3 (5F 503)

座長:藤井隆史(土木), 土屋直子(建築)

[1131] ELECTRICAL RESISTANCE MEASUREMENT TO ASSESS MOISTURE TRANSFER IN CEMENT-BASED MORTAR THROUGH WATER ABSORBING AND DRYING PROCESSES

Phuong Trinh BUI1, Yuko OGAWA2, Kenichiro NAKARAI2, Kenji KAWAI2 (1.Hiroshima University 2.広島大学)

Keywords:cement-based mortar, electrical resistance, internal relative humidity, moisture transfer

Based on calibration specimens, internal relative humidity (IRH) and moisture transfer (MT) in cement-based mortar through water absorbing and drying processes were assessed by measuring electrical resistance using stainless steel rods placed at intervals of 4 mm in the specimens. As a result, for cement-based mortar exposed to water, the initial change in IRH could be mainly caused by the penetration of liquid water and after wetness boundary, IRH increased gradually due to diffusion of water vapor. Meanwhile, IRH of cement-based mortar exposed to dried decreased gradually with time.