High Performance Concrete And Non-destructive Testing Technology Pilot Study

According to the history and present conditions of the high strength and performance concrete,the completely quantitative method that design the high strength and performance concrete is given in this paper.Bolomy's strength formula of concrete is only fit to the intermediate and low strength concrete.The component of the high strength and performance concrete is complex,and it is made up of sands,stones,water,cement,high-range water-reducer and mineral powder such as PFA,slag powder silicafume.At the same time,wether the high-range water-reducer is compatible with the cement muet be considered.The completely quantitative method may be considered a universal method about manufacturing high strength and performance concrete.Its peculiarity is as follows;The water to cement ratio and minerial dust are defined by the component of the cement.The quantity of the water is a little richer than that makes the cement completely hydrated.The dense aggregates are used to decrease the gap among the aggregate and the quantity of the cement and water.The aggregates are looked uponas spheroid whose diameter is D,then the gap among the aggregates is filled with the cement and water.During the experiment,the result of the test is satisfactory.This thesis firstly analyzes experimental research and present application of nondestructive test technique concrete both abroad and home,then bared on the experiments of ultrasonic detection,rebound method and compressive strength on specimens,the thesis completes preliminary experimental research on nondestructive test technique of high performance concrete.(1)Based on the analyses and studies on the experimental data,it can be concluded that the relationship between rebound value and compressive strength which the manufacturer of HT1000 resiliometer offers suits and high performance concrete with regional raw material in Jinan and can be applied in construction.(2)As regard to the influences on the results of nondestructive exammation when using diferentad mixtures.At earlier stage,for the same reboundv alue,the compressive strength of the blast-furnace slag concrete ishigher than that of fly-ash concrete,whereas at later stage, the compressive strength of the concrete mixed with fly-ash will be arise.(3)Finally,the thesis proposes a more accurate and more convenient relasionships between the rebound value and the strength of concrete-the average rebound value of high performance concrete and its compressive strength.