The Performance Of CRC In Antiflex Cracking And The Technique For Ring Method's Improvement

For The purpose of this paper, which is the research of CRC's application in concrete road surface and the improvable technique for the ring method who remarks on the crack resistance of concrete, we have studied the CRC's performance in antiflex cracking by meso-structure numerical simulation of the CRC specimens, the design of the concrete ratio on condition that CRC using for road surface, the ring method with partly airproof side and its rationale.Firstly, the measure for the meso-structure numerical simulation of the CRC specimens is used for reviewing the flex cracking process of the CRC specimens. As a result, we almost show the distributions of the flex stress and the deformations of the flexed CRC specimens. But the numerical model is defective and can't reflect the specimens'failure, for the stress concentration near the supports and the loading-on position.Secondly, the means for the design of the concrete ratio as CRC is used for road surface is put forward by CRC's antiflex cracking experiment. In the experiment, we also get the working performance, the strength gaining-in, the ductility, and so on of the CRC as a dry concrete, as well as the difference compared to common concrete.Thirdly, we put forward a improvable technique for the ring method, namely the ring method with partly airproof side. By a lot of experiments, we also frame a criterion for the operation of this method. According to this criterion, we carry though another experiment, which suggests that the new method limit the range of the crack on the whole without postponing the time of the ring specimens'dehiscence.Finally, we analyse the humidity distributions of the ring specimens with partly airproof side. Then we get the rationale of the ring method with partly airproof side.