| Quality Assessment of Concrete Blocks Exposed in Nature for Eighty Years |
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| 作者单位： | Hu Yuchu，Wu Shaozhang Lu Liyun Senior Engineer，Nanjing Hydraulic Research Institute，210029 Nanjing
Professor and Senior Engineer，Nanjing Hydraulic Research Institute，210029 Nanjing
Assistant Engineer，Nanjing Hydraulic Research Institute，210029 Nanjing |
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| 摘 要： | The concrete blocks used on a jetty in Shanghai were made in 1909 and 1910. Having been exposed in nature for 80 years, now there are 4600 pieces of blocks left on the jetty. Comprehensive inspections, such as external appearance examination, core-drilling of concrete blocks, ultrasonic detection, nuclear densimeter inspection and in-door and out-door chemical analysis, show that 75% of the blocks are of the rebound number of 21 - 23, and the saturated limit compressive strength and dry limit compressive strength of 10MPa; the carbonized depth of concrete is 1 - 2 mm. Compared with the state of the jetty in 1968, already used for 60 years then, the jetty is expected to serve another 40 years or more after being repaired.
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Quality Assessment of Concrete Blocks Exposed in Nature for Eighty Years |
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| Authors: | Hu Yuchu Wu Shaozhang Lu Liyun Senior Engineer Nanjing Hydraulic Research Institute Nanjing
Professor and Senior Engineer Nanjing Hydraulic Research Institute Nanjing
Assistant Engineer Nanjing Hydraulic Research Institute Nanjing |
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| Institution: | Hu Yuchu,Wu Shaozhang Lu Liyun Senior Engineer,Nanjing Hydraulic Research Institute,210029 Nanjing
Professor and Senior Engineer,Nanjing Hydraulic Research Institute,210029 Nanjing
Assistant Engineer,Nanjing Hydraulic Research Institute,210029 Nanjing |
| |
| Abstract: | The concrete blocks used on a jetty in Shanghai were made in 1909 and 1910. Having been exposed in nature for 80 years, now there are 4600 pieces of blocks left on the jetty. Comprehensive inspections, such as external appearance examination, core-drilling of concrete blocks, ultrasonic detection, nuclear densimeter inspection and in-door and out-door chemical analysis, show that 75% of the blocks are of the rebound number of 21 - 23, and the saturated limit compressive strength and dry limit compressive strength of 10MPa; the carbonized depth of concrete is 1 - 2 mm. Compared with the state of the jetty in 1968, already used for 60 years then, the jetty is expected to serve another 40 years or more after being repaired. |
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| Keywords: | jetty concrete block damage inspection durability |
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