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題 名 | Estimation of High Performance Concrete Strength by Pulse Velocity=利用波動速度評估高性能混凝土之強度 |
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作 者 | 林宜清; 張范宏; 蕭家孟; | 書刊名 | 中國工程學刊 |
卷 期 | 20:6 1997.11[民86.11] |
頁 次 | 頁661-668 |
分類號 | 440.327 |
關鍵詞 | 高性能混凝土; 強度; 波速; High performance concrete; Strength; Pulse velocity; |
語 文 | 英文(English) |
中文摘要 | 本研究以試驗方法建立高性能混凝土抗壓強度與波動速度間之關係,進而探討以波動速度 評估高性能混凝土抗壓強度之可行性。本研究乃採用變化水膠比及粗骨材含量共七種配比製成之100 ×200mm圓柱體為試體,養護溫度不同(10□,23□,and 40℃)對強度-波速間關係之影響亦加以探討, 最後由45種不同配比灌注之160個圓柱試體,被採用來評估強度-波速間關係之變異性。研究結果 顯示,第一天的波速成長幅度遠比強度來得大,波速及強度成長之正規化比較結果顯示,監測波速 成長將是一個追蹤混凝土強度成之良好指標;水膠比及養護溫度之改變並不會對強度-波速間關係 產生明顯影響;另外,由於波速對高性能混土骨材含量之改變並未如普通混凝土那樣敏感,因此以 波動速度評估高性能混凝土抗壓強度將比普通凝土更為可行。 |
英文摘要 | Experimental studies were carried out to establish the correlation relationship between compressive strength and pulse velocity for high performance concrete and, further, to evaluate the feasibility of using the pulse velocity to estimate compressive strength. Cylinders(100×200mm)made of high performance concrete with seven mixture proportions having variations in water/binder ratio and aggregate content were used as specimens in the studies. The influence of changing the curing temperature(10□,23□,and 40℃)on the strength-velocity relationship was also investigated. Finally, 160 cylinders from another 45 various mixtures were used to evaluate the variability of the strength-velocity relationship. Results obtained from these studies show that the velocity increases within the first day much more rapidly than strength. A normalized comparison of strength development with pulse velocity development shows that monitoring the development of pluse velocity would be a good indicator of the development of concrete strength. It is also shown that changes in water-binder ratio and curing temperature do not alter the strength -velocity relationship. In addition, the use of pulse velocity to estimate compressive strength of high performance concrete is feasible mainly because the pulse velocity is not so sensi-tive to the change in aggregate content. |
本系統中英文摘要資訊取自各篇刊載內容。