Open AccessEFFECT OF DIFFERENT TYPES OF RICE HUSK ASH ON SOME GEOTECHNICAL PROPERTIES OF CEMENT-ADMIXED SOIL
Author(s) -
Duong Thanh Nguyen,
Nguyen Thi Nu
Publication year - 2020
Publication title -
iraqi geological journal
Language(s) - English
Resource type - Journals
eISSN - 2663-8754
pISSN - 2414-6064
DOI - 10.46717/igj.53.2c.1rs-2020-09-01
Subject(s) - husk , atterberg limits , cement , compressive strength , geotechnical engineering , environmental science , soil stabilization , curing (chemistry) , materials science , composite material , soil water , soil science , geology , botany , biology
Rice husk ash (RHA) is an agricultural residue and has shown great potential for soil stabilization. However, the research on the utilization of RHA for soft soil improvement using cement deep mixing method is still limited and the efficiency of using different RHA types for soil improvement needs to be clarified. In this study, the effect of different RHA types on Atterberg limits, unconfined compressive strength (UCS), and elastic modulus (E50) of soil-cement mixtures will be investigated. Two types of RHA which obtained from open fire burning (RHA1) and burning in a furnace under controlled conditions of temperature and duration of burning (RHA2), were used for this study. The RHA contents from 0 to 15% and 10% cement of the dry weight of the soil were used to treat the soft soil. The research results show that the types of RHA insignificantly affect the change in Atterberg limits of cement-admixed soil. Regarding the soil strength, the RHA2 shows a higher efficiency in the enhancement of treated soil strength at 28 days of curing than the RHA1. The addition of 12% RHA2 to the cement-admixed soil can increase the UCS and E50 values of treated soil by more than 50%.