Use of Expansive soil with Rice Husk Ash and lime for Rammed Earth Constructions

Dhaval Patel2 , Abhijitsinh Parmar1
Page no. 16-21

Expansive soil has been a problem in India as in other countries. Current research found that there is a potential use of silica waste, resulting from burnt rice husk, as a pozzolonic material. This paper presents the results of study on the utilisation of ashes produced from uncontrolled rice husk burnt at Bavla.                                                                                                                                                                                                                                                                            In this research, a series of laboratory tests has been conducted. The tests were carried out individually or in a combination in which the Rice Husk Ash (RHA) content were varied from 40, 50and 60 percent, and the lime content from 3, 7 and 10 percent (by the dry weight of soil). All the samples have been remoulded at their optimum moisture content (OMC) and maximum dry density (MDD). The research shows that lime – rice husk ash decreased the swell of expansive soil and improved its strength and Weathering Test.