黄鉄鉱を配合したアスファルト舗装に関する基礎試験

舗装材料としての黄鉄鉱の利用技術 (第1報)

抄録

In order to find out a new use of pyrite, its utilization for the paving material was investigated.
In this report, the results obtained by some fundamental tests are mainly described. These are summarized as follows:
(1) The adhesiveness of asphalt to pyrite and the preventive effect due to adhered film against the oxidation of pyrite.
a) The adhesiveness of asphalt to pyrite is better than that of asphalt to the common paving aggregates such as andesite and limestone. This phenomenon is based on the differences in chemical affinity between asphalt and these materials.
b) The oxidation of pyrite is depressed by asphalt coating.
(2) The physical and chemical stabilities of the bituminous mixture containing pyrite.
a) The physical stability (Marshall stability) of the bituminous mixture containing pyrite is superior to that of the mixture consisting only of the common materials (limestone, river sand and powdered limestone). This tendency must be closely related to the article (1)-a).
b) Within the scope of the present investigation, the chemical stability of the bituminous mixture containing pyrite did not cause a situation which clashes with the standards of waste water provided in the Water Pollution Control Law. Part of the above results may be based on the effect of limestone mixed together with pyrite.
c) Accordingly, as a trial for practical application, constructing and examining'a test road mixed with pyrite are considered to be significant.