營建廢棄物應用於高性能混凝土之研究

A Study on the Application of Construction Wastes on High Performance Concrete

洪敏琮(Min-Tsung Hung)

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/cycu200600393

摘要

摘要
　　近年，因環保意識抬頭且缺乏營建廢棄資源堆置場，營建廢棄物的回收再利用已被政府積極推動，而營建廢棄物在填海造路上已普遍使用。本文主要在探討營建廢棄物應用於高性能混凝土之可行性，添加不同含量強塑劑之高性能混凝土其力學性質及高溫熱傳導性質等是否與普通高性能混凝土相同，並找出其最佳添加量。爾後，改變其水灰比及再生骨材之添加比例，做其力學性質及高溫熱傳導性質等研究，找出其最佳配比量。
　　試驗結果顯示，再生高性能混凝土之坍流度及強塑劑添加量與普通高性能混凝土等基本性質相同，當水灰比為0.3及強塑劑添加1.2％時有最佳表現，在抗壓強度上比普通高性能混凝土約折減了30％。在熱傳導係數上，與普通高性能混凝土發展趨勢並無明顯地變化，而再生高性能混凝土熱傳導係數較小，是因再生骨材本身吸水率高及孔隙多。爾後再藉由高溫抗壓（主要差異為骨材之不同）及燒失量（主要差異為配比之不同）來找出再生高性能混凝土之高溫火害性質改變。

關鍵字

營建廢棄物 ； 火害 ； 強塑劑 ； 再生骨材 ； 熱傳導係數

並列摘要

Abstract
　　In recent years, because of the rising of the environmental protection consciousness and the lacking of construction waste dumping yard, recycle use of the construction waste has been actively promoted by the government. In the past, construction waste was commonly used in filling out the sea and creating lands. This research is mainly to study the possibility of using the construction waste, together with superplasticizers, to produce high performance concrete. High performance concrete using construction waste was mixed in the laboratory with different amount of superplasticizers. Then their mechanic properties, high temperature effect and thermal conductivity is tested and compared with that of ordinary high performance concrete using natural aggregates. Optimum amount of superplasticizers can be determined from the test results. Then, the object of the study is changed to the water-to-cement ratio and the amount of recycled aggregate used. Their mechanical properties, high temperature effect and thermal conductivity are tested in order to find out the best ratio.
　　The test results show that, the slump-flow versus the amount of superplasticizers in recycled high performance concrete is the same as that of the general high performance concrete. Best performance occurs when the water-to-cement ratio is 0.3 and 1.2% superplasticizers is added. The compressive strength is only reduced by 30% compared with the general high performance concrete. The trends in thermal conductivity coefficient are almost identical. Since recycled aggregates have more voids and contains more, the thermal conductivity coefficient is less in recycled high performance concrete. Thereafter, the study is to find out the effect of high temperature on the compressive strength of recycled high performance concrete, and their lost of ignition.

並列關鍵字

Thermal conductivity coefficient ； Recycled aggregates ； Superplasticizers ； Construction wastes

參考文獻

32.劉靖國，「高強度鋼筋混凝土梁火害後撓曲行為之研究」，國立台灣工業技術學院碩

47.林川瑜，「再生混凝土中添加奈米黏土及高爐石粉性質之研究」，中原大學土木系碩

49.蔡正發，「奈米材料對混凝土性質影響之研究」，中原大學土木系碩士論文，2005。

Crushed Concrete Coarse Aggregate",Concrete International,1983.

Between Recycled Aggregate Concrete and Steel Bar",Cement Association of