Mechanical Property Test And Finite Element Analysis Of Masonry Performance Of Mortarless Recycled Block

With the rapid development of China’s economic society in recent years and the deepening of urbanization construction,the traditional building scale can no longer meet the needs of social development,and a large number of new buildings have emerged.Correspondingly,due to the demolition or reconstruction of existing buildings A large amount of construction waste is generated,and related research shows that the total amount of construction waste in China is increasing,which has brought a serious burden to society.However,China’s disposal method is relatively simple,and it is still stuck in open-air disposal or landfill treatment.In addition to bringing a huge burden,it also has serious environmental pollution and resource reuse problems.Therefore,the disposal or secondary use of construction waste is imminent and has become a topic for joint exploration at home and abroad.The mortar-free masonry means that the masonry only depends on its own structural measures to achieve the connection between the blocks during the masonry process,instead of using bonding materials such as mortar.Relevant scholars at home and abroad have made new mortar-free masonry The research and development of blocks is generally achieved by setting shear keys and grooves on the blocks to achieve the connection between the upper and lower blocks.Compared with the traditional block,the slurry-free block can significantly reduce the project cost,at the same time has less on-site wet work,a higher degree of assembly,saving environmental protection,shortening the construction period and other significant advantages,with high engineering application value And good economic benefits are in line with the strategic goal of "sustainable development" advocated by our country.In summary,if construction waste and pulp-free blocks are combined,the construction waste is crushed and sieved to make recycled coarse and fine aggregate as the raw material of the pulp-free blocks,and then used to prepare recycled pulp-free concrete blocks,Can not only reuse construction waste,but also solve the problem of construction waste disposal.However,the current research on this type is not sufficient,so based on the existing research,I have done the following work:(1)Development of recycled concrete-free concrete blocks: crush the concrete blocks abandoned by the factory and sieve out coarse and fine aggregates with different particle sizes,as raw materials for recycled concrete-free concrete blocks,and replace the regeneration with fly ash Part of the fine aggregate or cement in the aggregate,through the experimental study of21 groups of 21 recycled recycled concrete blocks in 7 groups,discussed the replacement rate of fly ash(2%,4%,6%)and the type of substitute The degree of influence on the mechanical properties of recycled pulp-free concrete blocks,find out the optimal replacement rate and the type of substitutes of fly ash in recycled test-free concrete blocks in the test range.(2)Finite element analysis of recycled grouting-free concrete blocks:According to the previous test results,the mechanical properties of recycled grouting-free concrete blocks were modeled and analyzed using ABAQUS finite element analysis software to discuss the resistance of recycled grouting-free concrete blocks Compressive strength and flexural strength,and then compare the finite element results with the test results to verify the accuracy of the finite element analysis.(3)Finite element analysis of the mechanical properties of recycled mortar-free concrete masonry: ABAQUS finite element analysis software was used to analyze the deformability and mechanical properties of recycled mortar-free concrete masonry,simulating the verticality of recycled mortar-free concrete masonry The mechanical properties of the recycled mortar-free concrete block masonry and the stress concentration of the recycled mortar-free concrete block were studied under the directional load and horizontal load.(4)Finite element analysis of the mechanical performance of reclaimed non-mortar masonry steel structure: the interaction of steel structural members and masonry was used to improve the non-mortar masonry,and the steel structure of embedded non-mortar wall was studied The mechanical performance and deformation performance of the system under external load.