以不同比例之營建廢棄物取代天然骨材對混凝土影響之研究

A study on the effect on concrete with natural aggregates replaced by various proportion of construction wastes

羅啟逢(Chi-Feng Lo)

指導教授 ： 何仲明

中原大學/工學院/土木工程學系/碩士(2006年)

https://doi.org/10.6840/cycu200600389

摘要

本文之目的在於探討以不同含量之再生粒料取代混凝土拌合時之天然粒料之可行性，同時亦添加奈米矽球於混凝土後，探討其機械性質、物理與化學性質及熱傳導性質之變化，再者以燒失量試驗求得燒失量與水化程度兩相比較後，印證所得之結果。
研究結果顯示，當再生粒料含量愈高時，混凝土之抗壓強度、高溫受熱後之抗壓強度、熱傳導係數、燒失量與水化程度會逐漸降低，當再生粒料含量為100％時，混凝土28天之抗壓強度折減約8.4％~10.3％、高溫受熱後之抗壓強度折減約16.9％~28.5％、熱傳導係數折減約2.6％~21.9％、燒失量與水化程度亦分別折減5.88％~7.05％與16.75％~19.6％。
此外，添加奈米矽球於混凝土後，混凝土之各項性質皆有所提升，當奈米矽球添加量為0.5％時，混凝土之各項性質有著較佳的表現。

關鍵字

奈米矽球 ； 熱傳導 ； 再生粒料 ； 燒失量

並列摘要

The aim of this research is to investigate the possibility of the usage of recycle aggregates, together with the addition of nano-silicate balls. The mechanical properties, physical properties, chemical properties and thermal conductivity of the concrete are studies and compared with a series of experiments which include the lost of ignition and degree of hydration.
Experiment results show that, when more recycled aggregates are used, the compressive strength before and after subjected to a high temperature are decrease. The thermal conductivity, lost of ignition and degree of hydration will also decrease. When 100% recycled aggregates are used, the 28-day compressive strength of concrete is reduced by about 8.4% to 10.3%. The compressive strength after subjected to high temperature will reduce by 16.9% to 28.5%, thermal conductivity by 2.6% to 21.9%, lost of ignition by 5.88% to 7.05% and degree of hydration by 16.75% to 19.6%.
Besides, with the addition of nano-silicate balls, all the above-mentioned properties of the concrete are improved. This improvement reaches its peak when 0.5% of nano-silicate balls are added.

並列關鍵字

thermal conductivity ； nano-silicate balls ； recycled aggregates ； lost of ignition

參考文獻

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