FREEZING AND THAWING TEST METHOD FOR REPRODUCED AGGREGATE

摘要

PPROBLEM TO BE SOLVED: To provide a testing method capable of evaluating precisely and easily freezing and thawing durability in a short time under a condition of a reproduced aggregate, without using any special device. PSOLUTION: In this method for testing the freezing and thawing durability of the reproduced aggregate used in concrete, a sample 2 of the reproduced aggregate provided by crushing raw concrete 1 is stored in a container 3, water is filled in the container 3 to immerse the sample 2 into the water, the container 3 storing the sample 2 and filled with the water is put in a refrigerator 4 and a water vessel 5 alternately to repeat freezing and thawing, the sample is taken out from the container to be dried, after repeated with a prescribed frequency, a particle size distribution of the dried sample is measured, and the particle size distribution therein is compared with a particle size distribution before the test to evaluate the freezing and thawing durability of the reproduced aggregate. PCOPYRIGHT: (C)2006,JPO&NCIPI