Effect of expansive additive and grout proportions on shrinkage of preplaces aggregate concrete | |
| Author | Das, Kunal Krishna |
| Call Number | AIT Thesis no.ST-17-08 |
| Subject(s) | Concrete--Shrinkage Aggregates (Building materials) |
| 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-17-08 |
| Abstract | This research is carried in order to find the effects of various grout materials, such as fly ash, sand, water and expansive additive; on the fresh properties (mini slump and flow cone), hardened properties (compressive strength) and dimensional stability (free shrinkage) of preplaced aggregate concrete. A two level full factorial model (2k) with center points is selected for this analysis. In 2k, 2 is the number of levels and k is the number of factors considered. Superplasticizer is used at a constant rate of 0.5% by wt. of binder. The total number of experiments performed is 33 and the obtained results are analyzed using a statistical software i.e. MINITAB 17. The effect of expansive additive on conventional concrete is also studied. Further, a comparison between PAC and normal concrete is drawn. Results showed that the fresh property, compressive strength and free shrinkage is dominated by sand, fly ash and expansive additive respectively. The maximum free shrinkage of PAC at 28 days was found to be about 300 microns (low shrinkage), which was further reduced effectively by the incorporation of expansive additive. Apart from lowering the shrinkage significantly, inclusion of expansive additive also resulted in higher compressive strength, for both PAC and normal concrete. Some mix proportion for different ranges of strength and shrinkage, at a minimized cost is provided, which can be used further. |
| Year | 2017 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-17-08 |
| 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) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2017 |