Study On Strength Curve Of Commercial Mortar In Shi Jia Zhuang Area

At present, commercial mortar has been widely used in the area of Shijiazhuang, the rebound method field testing of commercial mortar masonry strength,and establishment of the corresponding measuring curve is a very important task。This subject choose three commercial mortar representative in the Shijiazhuang area to conduct the system research, First of all, through the test to determination the carbonation depth of different strength grade of commercial mortar value、rebound strength value and compressive strength values, then analysis The carbonation depth, rebound strength values of the relationship between the three and the compressive strength。Data show that commercial mortar is the same condition curing test block carbonation depth values are more than 3mm, Even the carbonation depth values, through the analysis of data and graphics functions of the show the carbonation depth value effect on the compressive strength of commercial mortar is very small, the slope is almost linear type relationship between zero, so in this paper Neglecting the effect of carbonization depth on the rebound value; Based on the above conclusion, according to the rebound strength value and compressive strength values, We established the relationship curve of linear function、curve of logarithm function relation、curve of polynomial function、 curve of the power function relationship、exponential curve,comparison of the 5 correlation function curve, to determine the relation of power function curve of maximum correlation (y=0.0001x3.39,R2=0.9289) as the rebound strength we need value curves and compressive strength, establish the strength test curve in Shijiazhuang area for commercial mortar rebound method: y=0.0001x3.39,R2=0.9289。The end, through the field data validation, the average relative error in the calculated curve of compressive strength value is 11.29%,the average standard deviation of 7.60,to meet the average relative error is no more than plus or minus 14%, the relative standard error is not more than 17% of the requirementsThrough the experiment data analysis and verification, we have determined the power function curvilinear relationship (y=0.0001x3.39,R2= 0.9289) as a function of commercial mortar strength curve of Shijiazhuang area。...