Abstract
Resistance to impact and other suddenly applied loads is now recognised as one of the significant properties of fibre reinforced cementitious materials. Until recently there has, however, been no simple and practical test method to measure this property of fibre concrete and to evaluate the effectiveness of the different types of fibres in enhancing the impact strength of fibre concrete. More recently ACI Committee 544 has developed such a method, and this test is currently being considered for inclusion as an ASTM standard. This paper reports on the application of this test method to determine the impact resistance of structural lightweight concrete reinforced with steel fibres. It is shown that the test can effectively assess the impact resistance of plain and fibre concrete, and that it is able to distinguish the differences due to fibe shape and fibre geometry.
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