Development of grouting materials incorporating Mae Moh fly ash | |
| Author | Sukanya Takeuchi |
| Call Number | AIT Thesis no. ST-99-18 |
| Subject(s) | Fly ash Grout (Mortar) Fly ash Grout (Mortar) |
| Note | A thesis proposal submitted in partial fulfillment of the requirements for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Abstract | The quality of cement grouts can be improved in many ways. In this study, pozzolans namely rice husk ash and fly ash have been selected as constituents to improve the quality of grouts. The percentage replacements of fly ash and rice husk ash vary from 20 to 40% and 10 to 20% by weight of cementious materials respectively. The water to binder content ratio of mix prop01tions was computed from t1ial mixing and the flowability of cement paste. The water to binder ratio of fly ash cement grouts and rice husk ash cement grouts were fixed at 0.3 and 0.45 respectively. Bentonite was included as admixture to improve the bleeding and increase viscosity of cement grouts while the use of superplasticizer resulted in lower the water cement ratio and increase strength of cement grout. The dosage of bentonite and superplasticizer was fixed at 1 % and 1.5% by weight of cementious materials respectively. The flowability, bleeding and setting times were determined for freshly mixed grouts. For hardened grouts the compressive strength at different ages were determined. Test results indicated that the addition of fly ash significantly improves the flowability of cement grout, but led to reduce the compressive strength. The inclusion of rice husk ash in cement effectively increases the compressive strength and eliminates the bleeding of cement grout. Moreover, the times of setting of cement grout containing partial replacement by rice husk ash also decrease whereas for fly ash the setting times increase. The compressive strength of cement incorporating combination of rice husk ash and fly ash was better than that of cement grout incorporating fly ash or rice husk ash individually. The combination of 20% rice husk ash and 10% fly ash shows more or less the same compressive strength as that of control specimens. Therefore, the combination of rice husk ash and fly ash in cement grout led to the reduction in setting times and increasing of compressive strength. |
| 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) | Kishi, Toshiharu;Nii, Kazuyoshi; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |