低强度等级混凝土桩(LC桩)由于其工作原理及经济等因素，应用前景十分广泛。
The pile of low strength concrete (LC pile) has very extensive applied foreground because of its working principle AD economic factor.
随着年份的推移，年均热岛强度存在低强度等级热岛向中高强度等级热岛逐渐转化的趋势。
The annual mean UHI was evolving through years: low-magnitude UHI had a trend to evolve into mid-magnitude and high-magnitude UHI.
结果表明：选用低强度等级水泥、用粉煤灰部分取代水泥以及加入纤维都可以在一定程度上提高混凝土的自愈合效果。
The test results show that low grade cement, replacement of cement by fly ash, and adding some carbon fibers are all helpful in improving the self-healing performance of concrete.
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