| Author | Daladar, Telesforo |
| Call Number | AIT Thesis no. ST-93-4 |
| Subject(s) | Pozzuolanas
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master
of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This research is conducted to develop new kinds of pozzolana from other agricultural wastes apart from rice husk and rice straw. The study investigated the use of coconut husk, corn cob and peanut shell ash as pozzolana. A series of experiments were conducted to determine the properties of coconut husk ash, corn cob ash and peanut shell ash which are referred here as CHA, CCA and PSA respectively, and the properties of paste and mortar having a certain percent replacement of cement by these ashes. The properties of CHA, CCA and PSA namely specific gravity, fineness, chemical composition and the strength activity index with portland cement were determined. For properties of paste, only Ordinary Portland Cement and 30% PSA were investigated for normal consistency and initial and final setting time. To determine the compressive strength, three mixes were cast for CHA having a percent replacement of 0, 35 and 50 percent and four mixes were cast for both CCA and PSA having a percent replacement of 0, 20, 30 and 40 percent. Ordinary Portland Cement Type I was used and water content was controlled to have a flow of 105-115 % for all mortars. To investigate the influence of water to cementitious material ratio, four mixes were made to determine the optimum water content. Four kinds of mortar namely Ordinary Portland Cement, Rice Husk Ash, CCA and PSA were also tested for sulphate and acidic attack. Experimental results revealed that coconut husk ash cannot be utilized as pozzolana while CCA and PSA can be classified as F and N pozzolana respectively. CCA mortars have lower compressive strength than the control mortar (0% CCA) while PSA mortars showed higher compressive strength than the control mortar (0% PSA). Among the four mortars tested for chemical attack, PSA mortars showed higher resistance to sulphate attack and RHA to acidic attack. |
| Year | 1993 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Pichai Nimityongskul |
| Examination Committee(s) | Aoyagi, Yukio ;Ogunlana, Stephen O. |
| Scholarship Donor(s) | DAAD (Germany) |
| Degree | Thesis (M.Eng) - Asian Institute of Technology, 1993 |