Durability of Concrete in Marine Environment

• Main Authors: Cheng-Hsuan Yeh, 葉承軒
• Other Authors: How-Ji Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/36896956583293119085

碩士 === 國立中興大學 === 土木工程學系所 === 98 === The purpose of this project is studied the influence of concrete properties in marine environment by durable experiment. Current test methods for assessing the durability of concrete primarily are based on the ability which the external substances (the gas, liquid or ion) from the surface of concrete “permeate”into the internal part. In this study, the total chloride ions content and penetration depth of concrete will be measured to explore concrete behavior by seawater erosion after rapid chloride ions permeability test(CNS-1078) , other items including compressive strength, splitting strength, MIP porosity measurement and micro-hardness . Experiment variables includes immersion in seawater and exposure in coastal area. Analysis to different cement (Type-I and MS) of concretes affected for immersion in seawater and exposure in coastal area. Test results show that compressive strength of concrete by immering in seawater is weakened. It ascribed chemical breakage to cause compressive strength is unfavorable effect, and therefore is poor durability. On the other hand, compressive strength and splitting strength are compared on the result of the mechanical properties, and splitting strength of concrete resist the destruction of chemical by immering in seawater. And the greater part is water of influence, so splitting strength in the conservation of water was greater than it in the coastal environment. Within the total porosity of concrete is much less in seawater than in coastal environment. For the test result by high-strength concrete and subjoined Pozzolanic materials, and effective resistance to external ion penetration thus. The total chloride ions were displayed high concentration, and micro-hardness values showed weak strength.