| 摘要 |
PROBLEM TO BE SOLVED: To provide a mix proportion determination method for producing a CSG mixture which is capable of expressing prescribed strength and has good workability with respect to execution of construction work by using simple quality control procedure. SOLUTION: This mix proportion determination method comprises: sieving crushed stone or a material generated in the site to classify it into at least two kinds of classified aggregate; finding such a mixing ratio range of the two kinds of classified aggregate; as to provide mixed aggregate in a ratio within the range, with a solid volume percentage value within a prescribed range; preparing the respective samples of a plurality of CSG mixtures each containing the mixed aggregate in a ratio within the above range; adopting the mixing ratio of the aggregate (mixture) in such a mixture sample having a minimum VC value, as the mixing proportion of the aggregate (mixture); preparing the respective samples of a plurality of CSG mixtures having their respective unit water contents and unit cement contents, while using the classified aggregate (mixture) in the above mixing proportion; with respect to these CSG mixtures, finding correlation of the unit water content with the VC value and correlation of the unit cement content with the VC value, from the data on these samples; also, finding such an initial VC value as to provide a VC value which is measured after the lapse of a prescribed time and equal to or lower than a prescribed value; and finding such a unit water content and a cement content as to provide an initial VC value equal to or lower than the above initial VC value, from these correlations of the unit contents with the VC value, to adopt the found unit water content and unit cement content as the mixing proportion of water and mixing proportion of cement, respectively.
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