| Transparent concrete can turn opaque concrete into transparent material,which increases the natural lighting area of the building without losing the thermal insulation ability of the original wall,thus reducing the energy consumption of the building,and achieving the effect of energy saving and emission reduction.However,due to the poor binding force between resin and cement,the development of transparent concrete is restricted.In order to improve the bonding ability of resin pervious concrete interface,improve the strength of concrete and expand the application range of resin transparent concrete,this paper proposed to use basic magnesium sulfate cement with stronger bonding property and better mechanical properties as the matrix to prepare resin pervious concrete.In this paper,the preparation process,light transmittance,mechanical and Interfacial bonding performance and energy saving benefits of resin light transmittance concrete are studied.Firstly,the basic ratio of basic magnesium sulfate cement mortar was determined by adjusting the fluidity and passability of mortar,with the testing means of strength and phase analysis.The preparation of resin translucent concrete includes mold arrangement,casting,mold removal,cutting,grinding and other processes.Then,through software simulation and experimental test,the change law of concrete transmittance is studied.The effects of incident Angle,interfacial reflectance and resin size on the light transmittance of resin in concrete were studied by software simulation.In the experiment,the method of testing the light transmittance was optimized.By increasing the number of samples in the test and combining with the area conversion of the test area,more accurate light transmittance data was obtained.In addition,a more efficient method of obtaining the light transmittance of samples by image processing was also proposed.Optimized method is used to test the light transmittance of concrete with different resin content.The study found that when the resin content is 20%,14%,10%,the concrete transmittance is12.6%(±0.7%),7%(±0.5%),4.25%(±0.5%).Next,the influence of resin content on the mechanical properties of transparent concrete was studied,and the bonding ability of basic magnesium sulfate cement and Portland cement with resin interface was compared through interfacial shear strength and microscopic morphology analysis.The larger dosage of resin,the lower the strength of the concrete,the higher the water absorption,but the softening coefficient of concrete change little.The data show that the diameter of resin has little influence on the strength,water absorption and softening coefficient of concrete under the same resin content.Interface shear strength data shows,the basic magnesium sulfate cement interface shear strength higher than that of silicate cement,by the depth of field microscopy and SEM analysis,found the basic magnesium sulfate cement combined with resin interface more closely,and basic magnesium sulfate cement type resin interface grow many needle rod 5,1,7,increased the mechanical gearing effect of the interface.Finally,the energy efficiency of the concrete is evaluated through the simulation of building energy consumption and the calculation of the effective illumination fraction of the light transmittance performance.It is found that the higher the resin content is,the lower the airconditioning energy consumption of concrete will be.Compared with porous concrete hollow block,the energy consumption of concrete without resin is higher,while the energy consumption of transparent concrete with resin is lower than that of porous concrete hollow block.The dimensions of the resin can be determined by evaluating the effective illumination fraction of the concrete.When the length is selected as 100 mm,a resin with a radius of 13 mm can be selected for preparation. |
