Influence Of Mineral Admixtures On Mechanical Properties Of Ceramsite Concrete Wall Panels

The research of the paper is starting from the distribution of various materials in the ceramsite concrete lightweight wallboard and the inhomogeneity of itself.The quantification of the inhomogeneity is taken as the main innovation of this paper,including the inhomogeneity of the ceramsite concrete wallboard with quantitative analysis by particle content and mineral admixtures.The use of image recognition and analysis software,combined with test methods such as density stratification,ultrasonic speed,and strength,starts from the whole board of ceramsite concrete lightweight wallboard.The distribution of aggregate,density,ultrasonic speed,and strength of the whole board had been quantitatively analyzed.The test data can provide a reference for the actual transportation and construction of the wallboard in the project and reduce the damage to the wallboard in the process.This paper also analyzes the influence of the maximum particle size and content of aggregate on the performance of concrete and then analyzes the influence of the content of fly ash and silica fume on the mechanical properties of concrete.At the same time,it quantifies the influence of sealing membrane curing on the inhomogeneity of wallboard.The test result provides a basis for the selection of curing methods for wallboards.The company can choose different curing methods to meet different use conditions of wallboards.The influence of aggregate content and mineral admixtures on concrete inhomogeneity is quantified in the test.The inhomogeneity of wallboards will be influenced a lot by aggregate content and mineral admixtures.The optimization of inhomogeneity in this paper provides a reference,saving costs and improving the overall performance of the wall panel.The main conclusions of the research are as follows:(1)With the increase of aggregate particle size,the expansion degree of fresh concrete gradually increased,and the compressive strength and splitting strength of the sample decreased;The dry density,ultrasonic velocity,compressive strength,and splitting tensile strength of the sample decreased.(2)The compressive strength and splitting tensile strength of the samples can be improved by adding an appropriate amount of fly ash and silica fume alone;the effect of adding an appropriate amount of fly ash and silica fume in combination to improve the strength of the sample is better than that of individual mixing.enter.Fly ash and silica fume can effectively optimize their internal structure,make the interface transition zone more compact,and reduce the pores and cracks in the sample.(3)It is recommended to select ceramsite with a smaller particle size to make samples,which will make the uniformity and strength of the sample become better;When the mixture has strong fluidity and large particle size ceramsite is selected,the influence of inhomogeneity should be considered;It is recommended that the content of ceramsite in the mixture should be controlled at about 40%,which will be better for the uniformity of the sample.(4)The performance distribution of commercial ceramsite concrete lightweight wall panels has been studied: the proportion of aggregate particle area is proportional to the height of the sample;The density,ultrasonic velocity and compressive strength of the samples are inversely proportional to the height of the sample from the ground;Sealing film curing can significantly optimize the performance distribution of the wallboard,so that the parameters of the wallboard change more evenly.(5)Mineral admixture can improve the homogeneity of the specimen: from the density as well as ultrasonic velocity perspective,fly ash and silica fume can optimize the homogeneity of concrete;when the water-cement ratio is 0.3,when using mineral admixture,the amount of fly ash admixture should be less than 20%,and the amount of silica fume admixture should not be more than 5%,when using both at the same time,the total amount of admixture should be less than 18%.