Application of Rapid Detection Technology to Investigate the Expandable Behavior of Recycled Materials with Different Aggregate Sizes in Concrete

• Main Authors: Syun-Min Lin, 林訓民
• Other Authors: Wen-Ten Kuo
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/k32bkg

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 102 === Recently, industrial by-products recycled material become the focus of numerous recycling studies, but the material that has not yet been stabilized, will result in volume expansion, and Pessimum size effect is the one of the conditions for the expansion. In this study,concrete mixtures were prepared with the recycled materials of different particle sizes and fineness were replacing natural aggregates and cement. Used high-temperature catalytic technology accelerate the hydration reaction of concrete,to investigate the Pessimum size of the materials. The recycled material were Basic Oxygen Furnace Slag(BOF),Desulfurization Slag(DSS) and Electric arc Furnace Oxidizing Slag(EOS), each of different particle sizes by volume replaced completely the corresponding particle size of the natural aggregates; Electric arc Furnace Reductive Slag(ERS), Circulating Fluidized Bed Boiler(CFB) and Fly Ash(FA) passed nominal sieve size of #100 and #200 respectively, replaced cement by 30% volume. Begin the Autoclave Expansion, 100℃ Cure, 60℃ Cure, and accompanied by Compressive Strength, Ultrasonic Pulse Velocity, Resistivity, Scanning Electron Microscope, and X-Ray Diffraction verify the effect of the catalytic test. The results showed that the recycled materials used as the fine aggregate of concrete, the Pessimum size is between #16–#30 and #30~#50; as the Coarse aggregate is 1/2in~3/8in;the expansion of the mixture of passing #100 as cement is higher than the mixture of passing #200. The compressive strength, ultrasonic pulse velocity and resistivity of the mixture of the highest expansion were lower than other mixtures. SEM and XRD analysis result, the mixtures of high substitution will produce more calcium hydroxide crystals, which causes expanding and rupturing.