Experimental Research On The Physical And Mechanical Properties Of Self-thermal Insulation Concrete Block Of The EPS Composite Material Of Cotton Stalk Crushed Aggregates

"Green, energy saving, environmental protection" has become the theme of the 21 st century, more and more people attach importance to the sustainable development of green concept, development of new environmental protection wall materials has become the development trend of construction industry. Based on gypsum and cement gelled material, steel slag and slag as aggregates, and incorporating polystyrene particles, composite straw broken material, has been developed by different strength grade of compound since the insulation hollow block, and determination of its physical and mechanical performance. By using ABAQUS software to compound the compressive strength of insulation hollow block finite element simulation, and then the simulation results compared with the test results.Replacing part of the cement and gypsum 20% and 70% of the total cotton stalk broken material EPScomposite materials for freeze-thaw cycle test specimens.To compound the thermal-insulating blocks in nomads settlement project "warm" retaining wall in the application provides a certain theoretical reference basis.This paper mainly from the following aspects:(1) Research the increased amount of gypsum substitute for steel slag, slag as aggregate strength of composite material, the influence of draw replacing part of the cement plaster respectively 20% and 70% when the compressive strength of the composite, bending strength and pressure is better. On the basis of the EPS particles, and mixed with straw broken material and adopts three levels and three factors of the orthogonal experiment method, the research and analysis to get cotton stalk broken material EPS composite thermal-insulating blocks the optimal mixture ratio.(2) Research on physical and mechanical properties of composite since insulation hollow blocks, the compound since the insulation hollow blocks of compressive strength, bibulous rate, moisture content, softening coefficient, density and other physical indicators research, to compound the thermal test on block material, and theoretical calculation of the block and the wall of the physical properties such as thermal resistance, thermal inertia index.(3) For replacing part of the cement plaster of 20% and 70% of the total cotton stalk broken material EPS composite material specimens of proportion of four cases of freeze-thaw cycling test. Determination of mass loss rate and relative dynamic elastic modulus. Theory, the author analyzes the reasons of experimental phenomena appear.(4) Using the ABAQUS finite element analysis software to establish the numerical model of compound since the insulation block and masonry, on the compressive properties of compound since the thermal-insulating blocks are numerically simulated and the finite element simulation results were compared with actual results, verify the rationality of the model.Research on the one hand, for industry, building material utilization and comprehensive utilization of agricultural waste to provide effective way, on the other hand to provide agriculture herdsman "warm" to build a new thermal insulation material of popularization and application to provide theoretical basis and technical guidance,to compound the thermal-insulating blocks become industrial and civil buildings in a broader range of heat retaining wall provides some references for the application promotion.