AI SearchEnhancing fresh tremie concrete properties for bored/deep pile applications
Call Number: AIT Thesis no.ST-05-24 Material type:
SeriesSeries: Asian Institute of Technology. Thesis ; no. ST-05-24Publication details: Pathum Thani, Thailand : Asian Institute of Technology, 2005Description: 47 leaves : illSubject(s): Online resources: Dissertation note: Thesis (M. Eng.) - Asian Institute of Technology, 2005 Summary: Large diameter bored piles are extensively used in the construction industry in and around the Bangkok area. One of the major problems while pouring such piles using tremie pipes is the bleeding of fresh concrete. This leads to strength and durability problems in the upper portion of the pile due to increased water-binder ratio. This research focuses on finding an effective mix design that may be used in the wet process tremie concreting of large diameter bored piles with reduced bleeding properties without significantly affecting the strength, workability and setting time of the mix. Emphasis is placed on using locally available raw material to achieve the set goal. Results of tests conducted indicate that though rice husk ash and silica fume decrease bleeding, their affect on the other properties of interest is not complimentary. However, a 10-20% replacement of cement with Fly Ash (for the currently used mix design in the field), not only reduces the bleeding by approximately 25% but also favorably affects the strength, setting time and workability of the mix.
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A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
Thesis (M. Eng.) - Asian Institute of Technology, 2005
Large diameter bored piles are extensively used in the construction industry in and around the Bangkok area. One of the major problems while pouring such piles using tremie pipes is the bleeding of fresh concrete. This leads to strength and durability problems in the upper portion of the pile due to increased water-binder ratio. This research focuses on finding an effective mix design that may be used in the wet process tremie concreting of large diameter bored piles with reduced bleeding properties without significantly affecting the strength, workability and setting time of the mix. Emphasis is placed on using locally available raw material to achieve the set goal. Results of tests conducted indicate that though rice husk ash and silica fume decrease bleeding, their affect on the other properties of interest is not complimentary. However, a 10-20% replacement of cement with Fly Ash (for the currently used mix design in the field), not only reduces the bleeding by approximately 25% but also favorably affects the strength, setting time and workability of the mix.
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