Use of rice husk ash obtained from brick factories as cement replacement | |
| Author | Win Lwin Kyaw |
| Call Number | AIT Thesis no. ST-99-16 |
| Subject(s) | Rice hull ash Agricultural wastes Pozzuolanas Rice hull ash Agricultural wastes Pozzuolanas |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Abstract | This study is conducted to investigate the feasibility of using rice husk ash obtained from brick production factories for use as cement replacement in the rnral areas of the developing countries. Rice husk ash has been proven to be an efficient partial replacement to Portland cement in mortar and concrete. But it seems like wasting the heat energy coming out from the burning the rice husk under a controlled temperature and atmosphere. So it is required to investigate a method of producing rice husk ash without wasting the heat energy and it was found that the ash which was burned from brick production factory is regarded to be appropriate. An experimental programme was conducted to determine the properties of rice husk ash obtained from brick production factories and this rice husk ash mortar. For rice husk ash obtained from brick production factories, the specific gravity, fineness and chemical composition were investigated. To determine the properties of RHA-cement mortars, the experimental investigations were canied on the physical and mechanical properties of mortar made from six different types of rice husk ash taken from three selected brick production factories, namely initial and final setting times, density of mortar, modulus of rnpture and compressive strength. According to the results the two optimum type of rice husk ash were selected. To determine the effect of fineness of rice husk ash on properties of RHA-cement mortars, two optimum types of rice husk ash were ground in six different time intervals i.e. 45min, 75min, 90min, 105min, 120min and 150min. Test results showed that the rice husk ash obtained from brick production factories has pozzolanic properties and that it is possible to produce a cementitious material having a compressive strength similar to Portland cement type I, by blending cement and rice husk ash where the rice husk ash content does not exceed 20%. In addition, the duration of burning has a considerable effect on the compressive strength. The mortars with replacement of ash that has longer duration of burning are lower in compressive strength. It can be seen that the higher the fineness of rice husk ash the higher is the compressive strength of mortar and the densities of RHA-cement mortar also increases slightly. |
| Year | 1999 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pichai Nimityongskul;Pichai Nimityongskul; |
| Examination Committee(s) | Gupta, Satyendra P.;Kishi, Toshiharu; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |