The sulfate soundness test has been used for many years for evaluating the physical suitability of fine aggregate. This test suffers from poor within-laboratory and multilaboratory precision; it is a time-consuming and expensive test. The work described here was an evaluation of alternative tests for measuring soundness of fine aggregate. The tests studied were the attrition test and a modified version of the French micro-Deval test usually used for coarse aggregate. The micro-Deval test was found to have a significant correlation with magnesium sulfate soundness loss and water absorption of fine aggregate. Unlike the attrition test, the micro-Deval test is relatively insensitive to the gradation of the sand being tested and has excellent precision. The test is conducted by placing 500 g of water-saturated sand in a ball mill with 1250 g of 9.5-mm steel balls and 750 ml of water. The mill is rotated at 100 rpm for 15 min. The aggregate is washed over a 75-microm sieve and the loss is calculated as a mass percent of the original oven-dry weight. The test may be completed in less than 48 hr. Aggregates that give more than 25% loss are judged to be marginal for use in portland cement concrete and asphaltic concrete. The Ontario Ministry of Transportation has adopted the micro-Deval test for measuring the quality of fine aggregate for concrete and asphalt.