Strength Analysis Of Filling Mortar Stone Based On ANSYS

With the continuous innovation of construction technology,the technological process has been deepened,and construction mechanization has gradually replaced man-made people's vision.A new form of construction has been proposed.The technology of flushing mortar stone is a new technical means of masonry construction,and it is gradually entering our field and becoming a new fashion for construction.First,the rockfill body is randomly stacked,and the mortar is impacted with a pressurized cement slurry to form a dynamic continuous cement mortar.Because the mortar has impact force and its own gravity,it can smoothly fill the voids of the piled stone,and then realize the masonry and form the stone body.The resulting crushed mortar stone structure is called flushing mortar stone.In this paper,the following analysis is based on the technical characteristics of flushing mortar:Firstly,the strength test of the crushed mortar stone with different particle size aggregates was carried out.According to the relevant specifications,three sets of stone bodies with different particle size aggregates?5?20mm,20?40mm,40?80mm?were designed,combined with mortar.Compared with the research,the best proportion of mortar?ashing sand ratio of 0.28 and water-cement ratio of 0.975?was used for the simulated filling test,and then three sets of cubic stone stone test blocks were obtained,and the side lengths were both 200 mm×200 mm×200 mm.The test block is subjected to the compressive strength test of the press,and the compressive strength of the stone block is respectively detected,and the regression equation is fitted on the basis.Secondly,the strength test of the filling mortar with different mortar mixing ratio was carried out,and three different factors affecting the mortar strength were orthogonally analyzed.The three factors were:lime sand ratio,fly ash blending amount and desert sand substitution rate.Each factor is set at 3 levels,wherein the fly ash blending amount is 0%,20%,40%of the cementitious material;the desert sand replacing sand material ratio is 0%,20%,40%;the sand-ash ratio is0.26,0.28,0.30)),the best ratio is obtained by analytic hierarchy process.Finally,ANSYS finite element analysis software was used to analyze the stone strength of the experimental design,and the feasibility of ANSYS analysis was established by comparison with the test results.Furthermore,the large-diameter large-volume filling mortar is simulated to obtain the curve regression equation of large-volume aggregates with different particle sizes,and the general rule of particle size and strength change.The large stone body simulation of different mortar ratios is carried out,and the masonry strength specification formula is modified in combination with the simulation data to better meet the actual engineering needs.Through the research in this paper,the following analysis results are obtained:1)When the fixed lime-sand ratio is 0.28 and the water-cement ratio is 0.975,and the aggregate interval is between 5 and 80 mm,the strength of the filled mortar stone increases with the increase of the aggregate particle size.When the aggregate particle size is 40?80 mm,the stone body strength reaches the largest in the group.According to the compressive strength test of stone body with different particle sizes,the compressive strength test of the stone body with the best strength particle size is carried out,and the grouting strength test of different mortar mix ratio is applied.The analytic hierarchy process is used to obtain the best match in the presence of aggregate.Compared with the scheme,the ratio of lime to sand is0.28,the amount of fly ash is 20%and the replacement rate of desert sand is 20%.2)Carry out the basic analysis of ANSYS finite element,compare the calculated calculation results with the experimental data,establish the reliability of ANSYS finite element analysis,and further apply the large-volume filling mortar stone body,that is,the filling mortar masonry in actual engineering.Correlation analysis was carried out,and six groups of large-size aggregates?300mm,500mm,800mm,1000mm,1500mm,2000mm,respectively?were designed for simulation.The strength of the filled mortar masonry increased significantly with the increase of aggregate size.When the aggregate particle size is300?1500mm,the masonry strength increases linearly.When the particle size is larger than 1500mm,the strength growth rate decreases.The simulated maximum particle size is 2000mm,that is,the particle size is in the range of 1500?2000mm,and the masonry strength limit range is reached.After exceeding this range,the growth is slow.3)The ANSYS finite element analysis software was used to analyze the different mortar strength of the filled mortar masonry.According to the analysis results,the formula of the masonry strength formula in the Masonry Strength Specification was modified,and the aggregate strength and The strength specification formula of the large-scale stone body,that is,the flushing mortar masonry,is finally obtained for different mortar strengths,that is,f_m=k₁f₁^0.5?2.44+0.24f₂?k₂?...