混凝土芯样的端面最优处理方式试验研究

Experimental Investigation on the Head Face Optimal Processing Mode of the Concrete Core Sample

通过对三种端面状态的芯样进行抗压强度试验和分析,发现未打磨的芯样和打磨未修补的芯样,其抗压强度与立方体抗压强度均存在较大差异,同时强度的离散性较大,所以,不应直接用该强度来推定混凝土抗压强度。用水泥净浆修补打磨过的芯样,其抗压强度与立方体抗压强度基本一致,且该法要比用硫磺胶泥修补便捷,因此,在实际应用时推荐使用该法。但需注意,推定混凝土强度时应对强度标准值做一定妥协。

Based on compressive strength test and analysis by three head face states of the core samples found that the compressive strength and the cube compressive strength had a big difference between unpolished and burnished which was unrepaired core samples. Meanwhile, the intensity of large discreteness caused that it was not suitable to make presumption compressive strength of concrete use the strength directly. Core sample with cement paste repair polished its two strengths basically the same, and this method were more convenient than the sulfur plaster repair one, which was recommended to use in actual applications. It was worth noting that presumption of concrete strength when dealing with strength standard values for compromise.