The Analysis And Research On As-cast Finished Concrete

At present the as-cast finished concrete is widely applied to the bridge and the hydraulic project, etc. As a result of the structure's particularity, often requests the concrete material which uses to be able large scale to enhance the project structure or the component load-bearing capacity, reduces the structure or the component size and the dead weight, accelerates the template turnover and speeds up the project construction progress, can adapt the modernized project structure the need which to greatly cross, the heavy load, stands tall and erect, therefore the as-cast finished concrete generally has excels in the performance;And further because not passes through for the as-cast finished concrete surface whitewashes the decoration but directly exposes in the air, set the very high request to the concrete outward appearance quality and the durable performance. This through widely collects the domestic and foreign correlation datas literature about the as-cast finished concrete operational performance research paper, uses the theory instruction, depends on method generalized analysis clear water operational performance question and so on concrete intensity and durability which the experiment and the technical practice unifies, and produced the related technical measure.This article depends on technical data and so on material request, construction condition which provides to the Nanjing Yangtze River three bridges items department, united the Tongji University concrete material laboratory carries on the massive experimental studies to the as-cast finished concrete (includes intensity experiment, seep contrast experiment, anti- freezing and thawing quick freezing experiment, anti- carbonized durability experiment, anti- steel bar rust eclipse experiment, as-cast finished concrete does shrinks experimental, mix up cement anti- sulfate experiment), through the long-term tentative data collection, the reduction and the analysis, referred to other material literature, produced the as-cast finished concrete under different mixture ratio intensity and the durabledifference through the graph contrast way, In order to construct the raw material and the technical measure choice provides the reference.With the exception of this, this article even more puts the objective point in the concrete microscopic structure analysis. Through X - beam diffraction analysis, scanning electricity physics and chemistry analysis method qualitative analysis different mixture ratio the and so on mirror analysis, pressure mercury analysis as-cast finished concrete cement hydromass hydrated speed, the hydrated characteristic, the cement hydromass microscopic structure, hollow ratio and the aperture distribution and so on, and carried on the comprehensive discussion and the analysis, studied the as-cast finished concrete performance characteristic from the microscopic level.