Study on evaluation method of long term durability of cement sidings

Part1:Result of combined deterioration test

Abstract

This thesis is an arrangement for the result of “Standardization investigation research on the long-term durability evaluation technique of a pottery industry system siding” executed in Japan Testing Center for Construction Materials. In this report part 1, it reports on the result of the compound deterioration examination that Japan Testing Center for Construction Materials did as a verification experiment. In present JIS A 5422 (pottery industry system siding), weather resistance and the freezing and thawing-proof are provided for as an evaluation item of durability. Moreover, the neutralization (make to the carbonic acid) becomes from the document in the past and the hearing survey to the house maker and the degradation phenomenon by the cause becomes a problem. The degradation phenomenon when these deterioration factors act combining to evaluate the long-term durability of a pottery industry system siding is verified, and the problem in the examination method is enumerated.