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Use of fibre-reinforced self-healing cementitious materials with superabsorbent polymers impact energy

Book Contribution - Book Chapter Conference Contribution

One of the major flaws with concrete remains the susceptibility to cracking. The behavior and self-healing of cementitious materials with synthetic microfibers and superabsorbent polymers (SAPs) during and after a static four-point-bending test have been proven successful. It was however not known how this material reacts when subjected to impact loading. In this study, a reference mixture and a mixture containing 1 m% of SAP were tested at an age of 28 days and stored in different healing conditions (Wet/Dry cycles and at 95 +/- 5% RH). After 28 days of healing the specimens are impacted and healed again. The applied impact test is a Drop-Weight-Test (DWT) and the healing is microscopically monitored and studied by means of natural frequency analysis. Specimens containing SAPs show a more ductile behavior during impact loading compared to reference samples. This ductile behavior enhances multiple cracking of the strain-hardening cementitious materials causing a possible higher amount of autogenous healing, which was confirmed by natural frequency analysis. The evolution of the natural frequencies shows a superior healing caused by SAPs in both Wet/Dry-cycling and storage at 95 +/- 5 % RH.
Book: LIFE-CYCLE ANALYSIS AND ASSESSMENT IN CIVIL ENGINEERING : TOWARDS AN INTEGRATED VISION
Pages: 2255 - 2261
ISBN:9781315228914
Publication year:2019
BOF-keylabel:yes
IOF-keylabel:yes
Accessibility:Closed