預(yù)應(yīng)力簡支T梁C60高強度耐久性混凝土配合比設(shè)計
發(fā)布時間:2019-01-28 21:04
【摘要】:高強度耐久性混凝土是重載鐵路橋梁承載并長期安全運營的重要保障,現(xiàn)有規(guī)范通常對混凝土配合比材料用量限值、耐久性指標作出規(guī)定,但在材料品質(zhì)及用量對耐久性指標、強度增長、和易性影響方面尚無明確規(guī)定。本文對重載鐵路預(yù)制預(yù)應(yīng)力后張法簡支T梁C60高強度耐久性混凝土配合比設(shè)計過程中所遇到的材料品質(zhì)、耐久性、強度增長等問題進行分析,通過對工點周邊現(xiàn)有一般品質(zhì)材料進行試驗,分析配合比設(shè)計參數(shù)之間的關(guān)系,在規(guī)定限值范圍內(nèi)平衡設(shè)計參數(shù)之間的矛盾,確定最佳設(shè)計參數(shù),解決了混凝土配合比設(shè)計時材料品質(zhì)、耐久性、水膠比、強度、和易性不易兼顧的技術(shù)難題。
[Abstract]:High strength and durability concrete is an important guarantee for carrying capacity and long-term safe operation of heavy-duty railway bridges. The existing codes usually stipulate the limit value of concrete mix material amount and durability index, but in material quality and quantity, the durability index is determined. Strength growth, and ease of impact is not clearly defined. In this paper, the problems of material quality, durability and strength growth encountered in the design of C60 high strength and durability concrete mixture of Zhang Fa simply supported T beam after prestressing of heavy haul railway are analyzed. Through the test of the existing general quality materials around the work point, the relationship between the design parameters of the mix ratio is analyzed, and the contradiction between the design parameters is balanced within the prescribed limit, and the optimum design parameters are determined. The technical problems of material quality, durability, water / binder ratio, strength and easiness are solved.
【作者單位】: 濟南鐵路誠意工程檢測有限公司;
【分類號】:U444
[Abstract]:High strength and durability concrete is an important guarantee for carrying capacity and long-term safe operation of heavy-duty railway bridges. The existing codes usually stipulate the limit value of concrete mix material amount and durability index, but in material quality and quantity, the durability index is determined. Strength growth, and ease of impact is not clearly defined. In this paper, the problems of material quality, durability and strength growth encountered in the design of C60 high strength and durability concrete mixture of Zhang Fa simply supported T beam after prestressing of heavy haul railway are analyzed. Through the test of the existing general quality materials around the work point, the relationship between the design parameters of the mix ratio is analyzed, and the contradiction between the design parameters is balanced within the prescribed limit, and the optimum design parameters are determined. The technical problems of material quality, durability, water / binder ratio, strength and easiness are solved.
【作者單位】: 濟南鐵路誠意工程檢測有限公司;
【分類號】:U444
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