@article{oai:soar-ir.repo.nii.ac.jp:00011905,
author = {岸, 誠一 and 公文, 富士夫},
journal = {堆積学研究会報},
month = {},
note = {Grain-size analysis of muddy sand or sandy mud is a matter of trouble, because the sed1- ments abundantly include both sand and clay grain size which behave differently in principle. The analysis by a single method needs a very long time and/or a large labor for one specimen. The new procedure proposed here is a combination of a settling tube method for sandy fractions and a hydrometer method for muddy fractions. The hydrometer analysis is performed according to an ordinary procedure. Then wash the sample on a 4.5-phi standard sieve. Dry the fractions rested on the sieve, and weigh it. After then, analyze the coarse fractions by a settling tube method. The settling tube method is a newly-formed system which uses an electric balance and a computer. Make the two cumulative frequency curves, and combine them by ca1- culation. Theoretically, both curves should fit at 4.0 phi of settling-size grade, on the basis of the detailed research of effects by 4.5-phi sieving, Both curves, however, often differ slightly at 4.0 phi. Therefore, they are shifted to each other at 4.0-phi grade by changing the total weight of the used sample, namely "weight correction". This procedure takes 4 days to analyze 15 samples from coarse-grained sand to clay., Article, 堆積学研究会報. 38:101-106 (1993)},
pages = {101--106},
title = {沈降天秤法と比重計法の組合せによる泥質砂堆積物の粒度分析法},
volume = {38},
year = {1993}
}