Experimental Investigation of the Material Performance of the Ultrahigh Early Strength Concrete

摘要

Aiming at some special working condition,the high performance concrete(HPC)is investigated by combining the-ordinary concrete with the chemical additive or the active mineral admixture.The ultrahigh early strength concrete is one of the most popular HPC which has been extensively used in the construction of roads and tunnels,owing to the advantage of setting in a shorter time.Therefore,there is a growing need to investigate the material performance of the ultrahigh early strength concrete.In this study,several sets of contrast tests are well designed and conducted in order to experimentally investigate the material performance difference between the capability of the ultrahigh early strength concrete with specific mix proportion and the ordinary concrete such as the setting time,the workability,the impermeability and the compressive strength.The experiment results show that the ultrahigh early strength concrete works better than the ordinary concrete in most of the above material characteristics.To be specific,the ultrahigh early strength concrete appears the extremely higher compressive strength in the same curing time,the better permeability resistance and the slightly lower workability.Obviously,this kind of concrete is more prone to the application in the rapid construction of roads and tunnels.