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Slurry mixing water durability of concrete bored piles

Rate, test results in Table 3. Steel corrosion rate with time curve shown in Figure 1. Figure 1 a word shuttlecock in various steel corrosion rate of the mud can be seen from Table 3, age of the test period, reinforced mud soaked in sea water the corrosion rate slightly larger than the mud soaked in fresh water, sea water mixed with mud rust inhibitor corrosion rate of the early small, basically the same as fresh water mud later. Bored pile construction. Reinforced mud soaked in water a short time. And the lack of oxygen and basic protection of passive mode,[link widoczny dla zalogowanych], so no significant reinforcement corrosion. 3.2 Simulation Study pouring concrete bored piles for the understanding of the mud in the sea pouring concrete bored piles of chloride ion content and distribution, and further study its effects on durability of concrete, according to the construction of bored pile process, design a pouring funnel and mold, pouring underwater concrete construction process simulation. Pouring into the mud when immersed in seawater the qb28 3d round steel rebar and 6 until after the splitting out the concrete to harden steel,[link widoczny dla zalogowanych], with the x-ray diffraction and electron probe of a detected condition of reinforcing steel and chloride ion adsorption. Test results showed that: a smooth round surface without chloride ions, while the steel due to surface roughness, adsorption of a small amount of chloride ions. Semi-quantitative electron probe results showed that: the sea in the shape of the steel surface of the mud containing Fe,[link widoczny dla zalogowanych], si, A1, Mg, Ca, S, K, C1 element. Low chlorine content of which can be ignored. 3.3 Field test pile Distribution of chloride ions to study the marine mud pile distribution of chloride concentration in concrete. When in the field test pile test section of Hangzhou Bay Bridge A. Pier and piles of concrete drilling core samples to determine the total chloride in concrete, the specimen with acid treatment, the titration results in Table 4. Field sampling results can be seen. Concrete piles and piles of fresh water sea water is very low chloride ion content, are to meet the \4 Conclusion (1) Hangzhou Bay Bridge is located in the marine environment, the use of sea water mud not only benefit the local materials to reduce construction difficulty, but also greatly reduce the project cost. Test proved that the sea mud technology has economic,[link widoczny dla zalogowanych], security, operational and other characteristics, the results of a similar construction of offshore drilling is also instructive. (2) Since the water contains more cations have a greater impact the performance of mud, through raw material selection, the ratio of optimization and performance testing of a large number of mud,[link widoczny dla zalogowanych], a good stability can be formulated to meet the construction needs of the sea mud. (3) reinforced mud soaked in sea water within a short period of time, lack of oxygen and basic protection of passive mode, no significant corrosion of steel. (4) pouring concrete in the sea of mud in the pouring process to ensure that the case of smooth, concrete and steel surface chloride ion content to meet regulatory requirements. (5) As part of the concrete to harden when combined with chloride ions, oxygen, and the environment will prevent corrosion of reinforcing steel in concrete, so bored by the Hangzhou Bay Bridge will not affect sea mud durability of concrete.
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