Long-Time Study of Cement Performance in Concrete
Chapter 7. New York Test Road
F. H. Jackson and I. L. Tyler
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Test procedure, materials, mix proportions and construction procedures on the New York Test Road, a part of the Long-Time Study of Cement Performance in Concrete, are described. All 27 of the Long-Time Study cements were used in conjunction with a nontest cement for adjusting equipment and mix proportions. Performance of the test sections is assesed with respect to durablity of the concrete as a material, the only property directly studied in relation to the cement used. Seven and one-half years after the test pavement was completed no one cement proved superior to the others tested. However, the effects of the air entrainment in improving resistance of the pavement to scaling and weathering overshadowed all other variables. The use of abrasives with ice control chemicals caused sealing on non-air-entraining concrete. A 2 to 3-in. increase in slump of the test concrete has had no appreciable effect on the durablity of the concrete.