The Effect of Bamboo Stock Ash and Banana Stock Fiber Utilization on Soil Mechanical Properies

Because the strength of a structure is directly determined by the ability of the subgrade,
the soil used to lay a structure must have a good bearing capacity. It is required to improve the
carrying capacity of soils that do not have a strong bearing capacity by stabilizing the soil and adding
extra materials. Bamboo stem ash and banana stem fiber were used as stabilizing agents in this
research. The goal of this study was to see how applying bamboo stem ash and banana stem fiber
affected the soil's bearing capacity. The research method used in this study was an experimental
method carried out in the lab by varying the added materials used over a long period of time, namely
variations in the mixture of bamboo stem ash as much as 5% and 10%, and variations in the mixture
of banana stem fiber as much as 0.5 percent and 1%. Curing for 1 and 7 days to ascertain the value
of CBR, which was used to calculate the soil's bearing capacity. The results revealed that adding
bamboo stem ash and banana stem fiber to the soil increased the soil carrying capacity (DDT). Both
the CBR and the DDT values increased. The increase (DDT) with the addition of bamboo stem ash
and banana stem fiber as soil stabilizing agents, namely in the original soil the DDT value was 5.7
after adding 0 percent banana stem fiber and 5 percent bamboo stem ash the DDT value became 5.9
(increased by 3, 38 percent), in the mixed variation of 0 percent banana stem fiber and 10 percent
bamboo stem ash the DDT value became 6.2 (an increase of 8.06 percent), after adding 0.5 percent
banana stem fiber and 10 percent bamboo (an increase of