Stabilization of clayey soil for subgrade using rice husk ash (RHA) and sugarcane bagasse ash (SCBA)

F. Hidalgo,J Saavedra,C Fernandez,G Duran

doi:10.1088/1757-899x/758/1/012041

F. Hidalgo, J Saavedra + Show 2 more

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https://doi.org/10.1088/1757-899x/758/1/012041

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Abstract

This document studies the stabilization of the soil used as a subgrade, by adding locally available materials such as rice husk ash (RHA) and sugarcane bagasse ash (SCBA). These aggregates were added to the soil in substitution by weight between 5%, 7.5% and 10%. By adding these, the expansiveness is reduced while the maximum dry density increases, in addition the tendency of CBR is increasing and then tends to decrease proportionally to the addition of the aforementioned aggregates. This indicates a peak in CBR and expandability. The best result obtained from CBR was 33.75% with the 5% replacement mixtures.

Highlights

One of Peru's first economic activities is agriculture, about 3 million tons of rice cultivation is produced each year, which provides about 900 thousand tons of rice husk
This document studies the stabilization of the soil used as a subgrade, by adding locally available materials such as rice husk ash (RHA) and sugarcane bagasse ash (SCBA)
Compaction Results The Proctor Standard test was performed according to ASTM-D-1557 to determine the optimum humidity content and maximum dry density of clayey soil and mixtures

Summary

Introduction

One of Peru's first economic activities is agriculture, about 3 million tons of rice cultivation is produced each year, which provides about 900 thousand tons of rice husk. Sugar production is estimated at 9.4 million tons per year, La Libertad-Peru, is the department with the highest production around 4.5 million tons, representing almost 50% of the country's annual production. Kumar Yadab et al [1] conducted various studies by adding RHA to evaluate the physical and mechanical properties of clayey soils. This author proposed replacement percentages that vary from 2.5% to 12.5%. Through this replacement it was observed that the optimum humidity content and CBR increase proportionally to the addition of ash, while the maximum dry density decreases

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