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035 _a.b12379414
099 9 _aAIT Thesis no.ST-21-11
100 0 _aLu Min Thant
245 1 0 _aDevelopment of rapid setting and self-compacting repair concrete
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2021
300 _a74 leaves :
_bill.
490 1 _aThesis ;
_vno. ST-21-11
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology
502 _aThesis (M. Eng.) - Asian Institute of Technology, 2021
520 _aThis thesis was conducted to come up with Rapid Setting and Self-compacting Repair Concrete. The amount of cement, silica fume, and superplasticizer used in this study were carefully chosen based on literature research, pre-screening tests, and recommendation by suppliers to obtain the desired fresh properties of self-compacting concrete and desirable compressive strength at 7 hours. Slump flow test for flowability, V funnel test for viscosity, L box test for passing ability and penetration resistance for setting time were performed to test on fresh characteristics. For hardened properties, compressive strength at 7 hours, bond strength at 7 days, shrinkage at 28 days were checked. Two level full factorial design with center points was utilized as Design of Experiments (DOE) to analyze the results. Water-cement ratio, percentage of expansive additives content and percentage of silica fume content are selected as factors to investigate their effects on fresh and hardened properties of Rapid Setting and Self compacting Repair Concrete. All fresh and hardened characteristics of Rapid Setting and Self Compacting Repair Concrete were significantly influenced by the effect of silica fume except for L box test and free shrinkage test. A higher silica fume and expansive additive gives better results in mechanical properties of Rapid Setting and Self-compacting Repair Concrete. A mockup was performed to check whether the proposed mix design could be utilized on a real site. According to mockup test, Rapid Setting and Self-compacting Repair Concrete can give the good performance without cracking until 28 days and afterwards while the public is successfully using and passing over the repair mockup. As an additional work, Rapid Setting Repair Concrete was also developed and compared with commercial product which is available in Thailand. The developed Rapid Setting Repair Concrete possesses better workability and higher compressive strength at five hours than the commercial product.
650 0 _aSelf-consolidating concrete
_xAdditives
700 0 _aPennung Warnitchai,
_eChairperson
700 0 _aThanakorn Pheeraphan,
_eCo-Chairperson
700 0 _aRaktipong Sahamitmongkol,
_eExamination Committee
700 1 _aAnwar, Naveed,
_eExamination Committee
710 2 _aLoom Nam Khong Pijai (Greater Mekong Subregion) Scholarships,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ST-21-11
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B15698
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