Optimization of proporationing of normal strength concrete using a fractional factorial design method | |
| Author | Hnin Oo Wai Kyaw |
| Call Number | AIT Thesis no.ST-17-05 |
| Subject(s) | Concrete construction--Design Concrete--Mixing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-17-05 |
| Abstract | This research is carried out to find the effect of various material such as water-binder ratio, cementitious material content, fine to total aggregate ratio, fly ash, maximum size of coarse aggregate and fineness modulus of sand on the fresh properties and hardened properties of normal strength concrete. Two level of fractional factorial design (2{u100747}-1) where k is the factors considered and 2k-1 design will project into a full factorial in any (k-1) of the original k factors. The total number of experiment to perform is 32 mixes with different amount of fly ash percentage 0%,30%,20% and 10% the obtained result analysis of the result is done using software Minitab17. Results obtained showed that 7days compressive strength with higher percentage of fly ash doesn’t get high strength. When the longer time of curing with high amount of fly ash, it can be seen that to get the highest strength compared with without fly ash. There was no bleeding in any of the mix. The 56days compressive strength of concrete with fly ash 30% ranged from 21MPa to 62MPa and 7days with fly ash 30% only ranged from 14 MPa to 26MPa. Comparing the cost of DOE with 6mixes according to ACI calculation and Myanmar market mixes, DOE mix can be significantly low cost with designed strength and slump. Some mix proportion are also predicted which could be used further. |
| Year | 2017 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-17-05 |
| 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) | Punchet Thammarak;Thanakorn Pheeraphan; |
| Examination Committee(s) | Raktipong Sahamitmongkol;Pennung Warnitchai; |
| Scholarship Donor(s) | AIT Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2017 |