METHOD FOR MANUFACTURING GRANULAR IMPROVED SOIL AND GRANULAR IMPROVED SOIL

摘要

PROBLEM TO BE SOLVED: To provide granular improved soil with properties equivalent to those of grit soil, with respect to a method for manufacturing the granular improved soil and the granular improved soil.;SOLUTION: The method for manufacturing the granular improved soil 10 first throws construction generation soil 14 and calcined lime 17 from a silo 16 for limestone into a water content adjustment device 12 to adjust the water content of the construction generation soil 14. The water content is adjusted in the range of more than 20% and less than 35%. Next, in a cement addition step 42, the predetermined amount of cement 22 is added from a silo for cement to the construction generation soil 14 adjusted with the water content in step of conveying by a belt conveyor 18. Next, in a mixing step 44, the construction generation soil 14 is crushed and mixed with cement 22. The mixing step 44 is carried out using crushing-mixing device 24 in which the construction generation soil 14 is thrown from the top to a rotated chain 28 and crashed slab 30 to cause it to collide with the chain 28 and the crashed slab 30 at a lower stage in turn to crush it. Simultaneously, it is mixed with cement. Finally, in a curing step 46, the crushed and mixed granular improved soil 34 is conveyed to a curing place by the belt conveyor 32, and cured for 1 to 7 days.;COPYRIGHT: (C)2010,JPO&INPIT