Development of repair materials for concrete structures using locally available ingredients | |
| Author | Taweesak Triloga |
| Call Number | AIT Thesis no. ST-99-23 |
| Subject(s) | Concrete construction Concrete--Additives Concrete construction Concrete--Additives |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Abstract | The purpose of this study is to develop a new type of locally available repair materials, which possesses good performance and economical price. The repair materials to be developed are classified into three types. The first type is the cement-based repair material. The main parameter was the percentage of modified rice husk ash (hereinafter referred to as MRHA) replacement. The flow of cement paste was maintained at 100-110%. The dosage of accelerating admixture was also kept constant. The second type is the polymer cement-based repair material. The main parameters were the type and percentage of polymer material and the percentage ofiv1RHA replacement. The polymer materials, which were tested in this study, contained Primal MC76 and Dow Latex 470 (hereinafter referred to as. MC76 and LMC, respectively). The water to binder ratio ofMC76 formula was fixed at 0.28. However, the flow of LMC fo1mula was controlled at 100-110%. The dosage of defoamer was also kept constant. The third type is the epoxy-based repair material. The main parameter was the percentage of rich husk ash (hereinafter refetTed to as RHA) addition. The mix proportion of epoxy resin adhesive and hardener was kept constant. The results showed that the compressive strength of cement-based repair material containing 0% MRHA was significantly higher than those of other investigated repair materials. The :flexural strength of epoxy-based repair material containing 0% RHA was very high as compared with those of other investigated repair materials. The interface bond strength of epoxy-based repair material containing 10%, 20% and 30% RHA was significantly higher than those of other investigated repair materials. The strengths per cost ratio of cement-based repair material containing 0% MRHA were higher than those of other investigated repair materials. Nevertheless, the :flexural strength of cement-based repair material was drastically lower than that of other investigated repair materials. Although the flexural and inteiface bond strengths of epoxy-based repair material were considerably higher than those of investigated repair materials, however, the cost of epoxy-based repair material was also very high. Consequently considering both strengths and strengths per cost ratio of investigated repair materials, it can be summarized that polymer cement-based repair material containing 7.5% MC76 and 0% MRHA possessed satisfactory pe1f01mance and reasonable price. |
| 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) | Nii, Kazuyoshi;Pennung Wamitchai |
| Scholarship Donor(s) | AIT Partial Scholarship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |