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高性能灌浆料与混凝土界面黏结性能的研究
EXPERIMENTAL RESEARCH ON INTERFACIAL BONDING PROPERTY OF HIGH PERFORMANCE CGM TO CONCRETE
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摘要: 通过Z型试件剪切试验对CGM高性能灌浆料与老混凝土黏结剪切性能进行试验研究,分析掺水率、养护龄期、灌浆料强度等级等对黏结剪切性能的影响规律。研究结果表明:CGM高性能灌浆料与混凝土界面的黏结性能随着黏结龄期的增长而增长,且增长速率逐渐降低。对于老混凝土试件,采用CGM高性能灌浆料修补时,随着灌浆料强度的提高(灌浆料掺水率的减少),灌浆料与混凝土黏结试件的黏结剪切强度呈下降趋势;而随着灌浆料掺水率的增加,由于高性能灌浆料流动性能的增大,虽然其立方体抗压强度降低,但却有利于灌浆料与混凝土黏结抗剪性能的改善。Abstract: In this paper，the test of the Z-shape shear specimen of CGM to concrete showed how water mixing ratio， curing age and the CGM strength level affected the interfacial bonding properties of CGM to concrete． The result indicated that the interfacial bonding properties increased with the growth of the bonding age，and the growth rate gradually decreased． When repaired the old concrete with CGM，the shear strength of CGM to concrete decreased with the increase in the strength of the CGM ( the decreasing of the water mixing ratio) ． The cube compressive strength decreased with the fluidity increasing which was due to the increment of the water mixing ratio，but it was favorable to the improvement of the bonding performance of CGM to concrete．
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Key words:
- high performance CGM /
- water mixing ratio /
- concrete /
- interfacial bonding properties
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