| The concrete with anticorrosive ability under the acid medium function is called the acidproof concrete.The acidproof concrete is evolved from 1930s,were used mainly in the antiseptic projects of departments such as the petroleum,chemical industry,etc.Have begun to develop towards bearing structure since the seventies.But the acidproof concrete is applied to the agent structure project in Chongqing is still a new material,and the construction technology of the acidproof concrete is a new technology in Chongqing.According to development of industrial policy, "refund two enter three "of country,with another planning and construction of city,carry on construction and often adopt the acidproof concrete on some chemical enterprise's former addresses.This text has launched the construction technical research able to bear the concrete of weak acid under this background.The thesis writing and the third stage of overpass project about Jianxin Road,Jiangbei District, Chongqing combine together,this project passes through original day and melts in the factory district originally,according to its massif where one stays' chemical degree of pollution,confirm the pile of this project and bear the platform to need to adopt the concrete of low acid resistance.Through screening,it is the raw materials to resist cement of sulphate,local aggregate, high-efficient water-reducing agent of slow coagulation of fly ash,FDN-SP while determining to adopt. Before the project is used, have carried on the detailed and accurate quality testing and experimental analysis of the acidproof performance to the raw materials,result indicate select for use resist sulphate cement and local aggregate have good resisting sour corrosivity,it is a economical and practical choice that the ones that use it for being able to bear concrete of weak acid are formulated.After it is qualified that the material is measured,carry on to try experiment of mixing acidproof concrete,concrete mixed to try try piece after the 40% sulfuric acid solution is soaked for enough intensity and appearance integrality,it is successful that the ones that show and able to bear concrete of weak acid this time are formulated.Compare from the experimental result with the data,has found out the optimum match ratio of the suitable actual project,have carried on the construction technical research of this kind of concrete.According to the engineering characteristics of the design technology of artificial excavation Construction of the Bridge.But in the process of manual excavation found gas dissection,after a decision by a lot of efforts by bored piles.Acid-resistant concrete pouring underwater concrete construction technology used,pre-construction,construction process have adopted strict control measures, succeeded in avoiding the formation of floating slurry pipe joints leak caused sandwich broken pile hole wall collapse quality problems.And,through the self-test result analysis,the project's pile and pile cap construction quality standards.And,because the acid corrosion of concrete,which integrates the functions of weight bearing and also saves the project cost.In sum,subject this formulate with raw materials and acidproof concrete experiment,acidproof concrete construct technical research is the main content, succeed in,solve, test project corrosion to live in foundation endanger,indicate research this able to bear weak acid technology of formulating of concrete and construction technology successful.Verify use, resisting sulphate silicate cement, acidproof concrete that local material formulate use for large-scale municipal construction project feasible.The accumulation of this experience,offer the reference material for research and development of the acidproof concrete in Chongqing area and even the whole country,the technology of letting the special cement dispose the corrosion-resistant concrete goes still one step further,help to popularize the application in the structural project of acidproof concrete too.Reflects good economic and social benefits.
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