還原爐碴取代水泥性質之研究

A Study on Testing Mortar Properties with a Cement Replacement by Using Reducing Slag

林柏彰(Bo-Zhang Lin)

指導教授 ： 林至聰

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2012年)

https://doi.org/10.6841/NTUT.2012.00176

摘要

本研究主要探討還原爐碴取代水泥與額外增加後之工程性質，包括硬化前之浮水現象、標準稠度用水量、凝結行為，硬化後之抗壓強度、抗拉強度、乾縮現象。首先以標準水泥砂漿配比做為基礎，再進行5005及3008之還原爐碴取代水泥10%、20%、40%、60%、80%及除標準配比水泥外再額外增加10%、20%、30%還原爐碴之條件下，進行試驗研究比對的齡期為3天、7天、14天、28天、42天、60天、90天、120天，求出水泥砂漿抗壓、抗拉強度之長短期性質變化狀況以其求得還原爐碴最佳之添加量。
試驗結果顯示：水泥砂漿添加5005及3008的還原爐碴，其對抗壓強度並無較佳貢獻，在常溫下，取代10%、20%及增加10%、20%、30%還原爐碴的水泥砂漿在養護齡期28天後抗壓強度與標準水泥砂漿強度相近。取代40%、60%、80%還原爐碴則無法達到標準強度，凝結時間也比較長。

關鍵字

還原爐碴 ； 抗壓強度 ； 抗拉強度

並列摘要

This research aimed mainly at the study on the engineering properties such as the bleeding, water content at normal consistency and setting times of fresh concrete and compressive strength, tensile strength and shrinkage of hardened concrete in which the cement was partially replaced with reducing slag, and the slag was added as an extra cementitious material in addition to the selected proportion. Firstly, the proportion of standard sand mortar (CNS1010) was adopted as the basis. Then the proportioned cement was separately replaced with 10%, 20%, 40%, 60% and 80% of reducing slag of fineness 5005 and 3008. in other condition, the reducing slag of 10%、20%、30% was separately added as an additional cementitious material to the adopted composition of standard mortar. The mortar specimens were tested at ages of 3 days、7 days、14 days、28 days、42 days、60 days、90 days and 120 days. to find the development of their tensile and compressive strength in short and long term so that to get the optimum proportion of reducing slag.

The outcome of test shows :
Adding of 5005 and 3008 reducing slag to the cement mortar shows ltttle contribution to its compressive strength. under normal temperature the compressive strength of slag-added standard mortar close to that of standard mortar after 28 days curing when the cement was replaced with 10% and 20% of reducing slag or when the reducing slag was added by 10%、20%、30% as an extra. specimen of cement replaced with 40%、60%、80% of reducing slag has strength less than standard mortar and also has extended setting time.

並列關鍵字

Reducing Slag ； Compressive Strength ； Tensile Strength

參考文獻

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