Research On Strength Of Fiber Reinforced Cement Mortar Detected By Cast-in-place Pull Out Method

Fiber reinforced cement mortar is the most commonly used reinforcement material(Polypropylene-Engineered Cementitious Composite, Polyvinyl Alcohol-E ngineered Cementitious Composite, steel fiber cement mortar). Currently there i s no standard to detect the compressive strength of fiber reinforced Cement mo rtar in domestic. In order to choose a better mothed to detect the compressive strength of fiber reinforced Cement mortar, this paper studies the application of cast-in-place pull out method for fiber reinforced Cement mortar.In this thesis, the cast-in-place pull-out test was conducted on concrete specimens which were reinforced by Polypropylene-Engineered Cementitious Composite, Polyvinyl Alcohol-Engineered Cementitious Composite, steel fiber cement mortar. The grade of Plain concrete used in this experiment is C15?C20?C30?C40?C50. The grade of fiber cement mortar is M20?M30?M40?M50,?M60?M70?M80?M90 and M100. In considering the actual of reinforcement Construction, grouping them. Based on the data of cast-in-place pull-out test and cube strength test of cement mortar, Choosing linear relationship fit the experimental data by using the method of least squares, Resulting in three kinds of fiber reinforced cement mortar strength curve. Then, Then the strength curve is deal with regression analysis? significant test and interval estimation. The test results show that a good linear relationship exists between the strength of cement mortar and the cast-in-place pulling out force.The cast-in-place Pull-out Method has many advantage includeing that it has very high precision and it much cheaper and quicker. This method also was more convenient than other methods because it requires much lighter machines and tools. As we can see that the cast-in-place Pull-out Method can be an efficient and effective means in detecting the strength of fiber reinforced cement mortar. In this thesis, the research first put out method testing compressive strength of fiber cement mortar standards and provide the experimental basis.