Experimental Study On The Basic Mechanical Properties Of Shale Fired Heat-insulation Block Masonry

The shale fired heat-insulation block uses the shale as the main raw material, fly ash and coal gangue as admixture, plant fiber or granular polystyrene as pore forming agent, through crushing, aging, block type extrusion, cutting, drying and sintering. Compared with the traditional masonry, it has low coefficient of heat conduction that can reduce the heat transfer between the inside and outside the building and achieve thermal insulation wall itself. Coupled with the application of the thin mortar joint technology, it can satisfy the requirement of 65% energy saving in building envelope; To improve the way of traditional masonry, Vertical seam can lock and press tightly to each other through Convex ribs. Horizontal mortar joint adopts “dry-mixed masonry mortar method”, the masonry surface after polishing is bonded with the special mortar, forming the very thin mortar joint which is 1mm~3mm; Vertical thin-walled honeycomb hole blocks size is larger and its weight is only 8 k N/m3, which is about 45% of the common brick masonry and is advantageous to the structure of the earthquake.This paper has the experimental study on the whole and half of Shale fired heat-insulation block masonry having holes with different shapes that is consisted of different strength grades of blocks and mortar groups impressive and shear specimens, Considering the block strength, the mortar strength, specimen size, set of build by laying brick form, holes and other factors, these factors affect the performance of the basic mechanics, we carried out the thorough comparative analysis with the previous experimental data. Reasonable strength and deformation parameters are given provided later research on structure and overall structure seismic performance research with basic parameters. The following is the main content of this paper:(1) The basic mechanical indexes of the new type block are got by the experimental study on the compressive strength of the shale fired heat-insulation block. The compressive failure features of it are mastered;(2) The influence law of the different bottom die for the mortar strength is revealed and the strength index of the special laying mortar is given by the experimental study on the compressive strength and the flexural strength of the special laying mortar specimens with different bottom die;(3) The compressive failure characteristic of the shale fired heat-insulation block masonry is obtained by the compressive experiment on this masonry, Compression failure characteristics and deformation performance of the shale fired heat-insulation block masonry with rectangular holes and the diamond holes are mastered, and the factors affect the failure features that include the shape of the holes and the size of the specimens and so on. The calculation formula of the average value of Compression strength for the shale fired heat-insulation block masonry is put forward;Based on analyzing the applicability of the different stress-strain relationship expression, the stress-strain relationship expression of the shale fired heat-insulation block masonry is put forward, and it can be used to calculate elastic modulus, results agree well with the test results; The standard value and the design value of compression strength for this masonry are suggested;(4) The shear failure characteristic of the shale fired heat-insulation block masonry is obtained by the shear experiment on this masonry, by analyzing the different shear surface sizes that affect the shear strength, the calculation formula of the average value of shear strength for the shale fired heat-insulation block masonry is put forward and the standard value and the design value of shear strength for this masonry are suggested.