Dynamic compressive behavior of ceramic fiber reinforced concrete under impact load

Dynamic mechanical properties of geopolymer concrete after water immersion

“…These two actions hence allow the 176 strain at a given stress to decrease with the strain rate, which exhibits a stiffening effect and results in the 177 increasing trend of elastic modulus [33]. Besides, the others [27] also observed a reduction in elastic modulus at 178 higher loading rate, which is probably attributed to the softening effect of cracks. With the increase of strain rate, 179 more and more cracks initiate and develop during the ascending process of stress-strain curves, which decreases 180 the rigidity of the whole specimen and leads to the decrease in elastic modulus.…”

“…Besides, according to the 115 interpretation proposed in [26], the absorbed water could lower the Van der Waals forces between gels particles, 116 which also causes adverse effects on GC W . 117 representative strain rate used here is the mean strain rate over the loading period [27]. The corresponding 119 relationship between dynamic strength and strain rate was established by regression and shown as follows: 120…”

Static and dynamic mechanical properties of high early strength alkali activated slag concrete

“…The strain gages are attached at the end of incident bar and the head of transmitted bar to measure incident pulse, transmitted pulse and reflected pulse. Then the dynamic response of specimen can be analyzed using three-wave method [23] . To reduce the friction effect of end faces and achieve the nearly constant strain-rate loading, the cylinder specimens was thoroughly polished before test and the brass pulse shapers were used.…”

Blast resistance characteristics of concrete with different types of fibre reinforcement

“…Research on the use of fibres to increase both the blast and impact resistance of concrete has typically been focused on steel fibres and less on polypropylene fibres [5], [6], [7]. Some studies were found dealing with glass, nylon, ceramic and carbon fibre-rein-forced concrete related to the blast or impact resistance of the material [8], [9], [10], [11]. These studies confirm that fibre-reinforced concrete (FRC) performs better under impact load than plain concrete without reinforcement.…”