添加玻璃纖維對不同再生粒料混凝土 影響之研究

A Study on Effect of Addition of Glass Fiber to Concretes with Different Recycled Aggregates

簡志青(Chin-Ching Chien)

指導教授 ： 何仲明

中原大學/工學院/土木工程學系/碩士(2007年)

https://doi.org/10.6840/cycu200700536

摘要

摘要

本文目的為藉由玻璃纖維之高拉力強度添加至混凝土中，改善普通混凝土及再生混凝土低抗拉、低抗彎及脆性之缺點。本文先以再生細骨材及不同玻璃纖維體積比拌製成水泥砂漿，再以天然細骨材及不同種類之粗骨材及不同玻璃纖維體積比拌製成混凝土，比較其強度並且探討相互之影響及最佳之組合。
研究結果顯示，添加玻璃纖維水泥砂漿之強度沒有明顯提升。天然粗骨材最大粒徑19㎜及玻璃纖維體積比0.2％、再生粗骨材最大粒徑19㎜及玻璃纖維體積比0.2％、再生粗骨材最大粒徑12.7㎜及玻璃纖維體積比0.2％、再生粗骨材最大粒徑9.5㎜及玻璃纖維體積比0.1％之組合，其提升混凝土之抗壓、抗彎、劈裂強度為最佳。再生粗骨材最大粒徑越小時，添加玻璃纖維體積比須越少，混凝土之單位重越小，坍度損失越多，超音波波速越低，受高溫後抗裂縫之效果越不明顯。

關鍵字

再生骨材 ； 玻璃纖維 ； 粗骨材最大粒徑

並列摘要

Abstract
The aim of this research is to study by adding high strength glass fiber into concrete in order to improve the deficiency of low tensile and flexural strength and brittleness of normal and recycled concretes. Cement mortar is mixed with recycled fine aggregate and different glass fiber volume ratios. Then concretes are mixed with natural fine aggregate and different kinds of recycled coarse aggregates and different glass fiber volume ratios. Their strengths and other properties are compared to determine the best combination.
Results show that, the strength of cement mortar with glass fiber was not obviously improved. It is found that the following combinations have the best compressive strength, flexural strength and split tensile strength: natural coarse aggregate of maximum size 19mm and glass fiber volume ratio 0.2％, recycled coarse aggregate of maximum size 19mm and glass fiber volume ratio 0.2％, recycled coarse aggregate of maximum size 12.7mm and glass fiber volume ratio 0.2％, recycled coarse aggregate of maximum size 9.5mm and glass fiber volume ratio 0.1％. For recycled coarse aggregate with smaller maximum size, less glass fiber volume ratio must be added. For concrete with less unit weight, the slump loss was larger, the ultrasonic velocity was slower, and resisting of cracking after concrete subjected to high temperature was less obvious.

並列關鍵字

Recycled Aggregate ； Glass Fiber ； Coarse Aggregate Maximum Size

參考文獻

19. 周志遠，「高溫對玻璃纖維混凝土影響之研究」，私立中原大學土

31. 王天志，「高性能混凝土柱耐火性能之研究」，國立交通大學博士

recycling process induced damage sensitivity of recycled concrete

Ontario Ministry of Transportation,Downsview,Ontario,USA（1989）.

concrete paving blocks prepared with recycled concrete aggregate,”