11 results about "Apparent density" patented technology

The present invention relates to a method and device for rapidly and comprehensively evaluating the performance of tunnel muck used for manufactured sand, comprising the following steps: 1) Specimen preparation: Using a vibration device (1), a temperature control device (3), and a weighing device (10) to rapidly obtain dried and saturated surface-dry specimens. 2) Apparent density and water absorption test: Measuring the mass of water discharged by a known mass of saturated surface-dry specimens and heating to obtain the mass of the dried specimens. 3) Crushing index and softening coefficient test: Pressurizing, automatically screening, and weighing the dried and saturated surface-dry specimens respectively. 4) Soundness test: Realizing the rapid test of soundness based on temperature control, automatic screening, and weighing. 5) Automatic data acquisition and processing: Automatically acquiring and processing the above data. The evaluation method and device proposed by the present invention can simultaneously and rapidly test the physical and mechanical properties and durability of muck, solve the problems such as long test cycle and single test result of muck performance, and are applicable to the rapid evaluation of manufactured sand parent rocks such as muck, pebbles / gravels.

The application provides a method for predicting apparent density and a measuring device thereof, and relates to the technical field of detection devices. The method predicts the accurate apparent density value of different batches of materials by measuring the batches of materials in real time and according to the actual particle size distribution of the materials, so that more accurate apparent density information is provided for the determination of an optimal formula, and better finished products are achieved.

This invention belongs to the field of earth pressure balance shield tunneling technology, specifically relating to a device for detecting the effect of soil improvement on earth pressure balance shield tunneling and its application. The technical solution of this invention is as follows: A device for detecting the effect of soil improvement on earth pressure balance shield tunneling includes an upper frame, a lower frame, casters, a test module, and a monitoring and control module. The casters are located at the bottom of the lower frame, and the upper frame is mounted on the lower frame. The test module and the monitoring and control module are placed within the upper and lower frames. The test module is used to conduct shear tests, slump tests, and pressure permeability tests. The monitoring and control module is used for equipment operation, data collection, data calculation, and effect evaluation. This invention can simulate the physical and mechanical properties of the soil during actual shield tunneling excavation and muck removal, and intuitively evaluate the smoothness of soil removal. It can simulate the actual pressure value of the shield tunneling soil chamber, and evaluate the homogeneity and fluidity of the improved soil from a new perspective of soil force transmission efficiency and apparent density.

This invention relates to the field of geological exploration and discloses a method for determining shale porosity using the difference in rock density and fluid mass. First, the apparent density is calculated by measuring the mass and apparent volume of a blocky rock sample. Then, the rock sample is crushed, extracted, and dried, the fluid mass loss is measured, and the skeleton density of the dried powder is measured. Finally, the volume difference per unit mass of rock is estimated using the reciprocal difference between the apparent density and the skeleton density, and then corrected for fluid loss mass to obtain the total porosity of the rock sample. This invention calculates porosity by using the density and fluid mass differences of rock samples with different particle sizes, and is not limited by the size of the rock sample or the fluid it contains. It can measure closed pores in the rock, and by using the fluid loss mass during crushing, washing / extraction, and drying processes for correction, a more accurate total shale porosity can be obtained.

This invention belongs to the field of building construction technology and discloses a method for determining the layered packing parameters of concrete. The method includes the following steps: obtaining the first friction coefficient μ of the bottom structural surface, the apparent density ρ of the concrete, and the known packing parameters of the concrete layer based on the building construction plan; and determining the packing parameters based on τ... y =ρgh(sinα-μcosα) yields the uncalculated packing parameters of the concrete layer; known packing parameters include the preset yield stress τ of the concrete layer. y The method for determining the concrete layer stacking parameters includes any two of the preset layer thickness h and preset inclination angle α of the concrete layer. The stacking parameters to be calculated include the preset yield stress, preset layer thickness, and preset inclination angle, excluding the two known stacking parameters. This method not only establishes the relationship between yield stress, inclination angle, and thickness, but also fully considers the influence of friction between the concrete and the underlying structure.

The invention relates to the technical field of constructional engineering, in particular to a method and device for detecting the moisture content of coarse aggregate. The method comprises the following steps: acquiring the total volume of a volumetric flask, the water content of a coarse aggregate sample, and the total mass of the coarse aggregate sample and water added when the coarse aggregate sample is put into the volumetric flask and water is added until the volumetric flask is full; obtaining the apparent density of the coarse aggregate sample and the density of water; calculating the volume of the coarse aggregate sample based on the total volume, the total mass, the apparent density of the coarse aggregate sample and the density of water; calculating the product of the density and the volume of the coarse aggregate sample to obtain the dry mass of the coarse aggregate sample; and calculating the water content of the coarse aggregate sample based on the water content mass and the dry mass of the coarse aggregate sample. The detection efficiency of the water content of the coarse aggregate can be greatly improved.

The invention provides a method and a system for predicting particle size distribution of a sintered mixture after granulation. According to the method, raw materials are divided into fine particles smaller than a preset threshold value and coarse particles larger than the threshold value; when the total weight percentage of the fine particles meets a preset condition, the method calculates the growth volume ratio of the particles based on the particle size distribution and proportion of the raw materials and a group of physical parameters including apparent density, bulk density and fine particle adhesion ratio. And finally, predicting the target particle size of the coarse particles based on the V%, and determining the final particle size distribution in combination with the amount of the non-adhered fine particles. According to the method, key parameters such as the adhesion ratio reflecting the internal balling performance of the raw materials are introduced, a simple and accurate prediction model is constructed, prospective regulation and control of the granulation granularity can be achieved in the batching stage without complex data training, and the method has important industrial application value.

The invention discloses a design method of a cementing material with a crack self-repairing function, which comprises the following steps: step 1, testing the maximum particle size, the characteristic particle size, the apparent density, the repairing capability, the uniformity coefficient and the mass of a self-repairing functional component, testing the apparent density, the void ratio, the mass and the crack width of the cementing material, and calculating to obtain a crack filling rate; 2, calculating the compounding proportion of the crack self-repairing functional component and the main body cementing material; and 3, testing the crack self-repairing effect, and determining the component relationship of the composite cementing material. The invention provides a quantitative design method for self-repairing functionalization development of a cementing material. At present, no similar technology exists. The calculation method aims at micron-sized self-repairing functional components, and the pertinence is high; according to the calculation method, factors such as self-repairing component performance, crack characteristics and main body cementing material performance are considered, the result is more accurate, the design freedom degree is high, and diversified use requirements are met.

The invention discloses a method and a system for identifying a prospecting marker bed of a sandstone type uranium mine in a northern cretaceous system stratum of an Ordos basin, and relates to the technical field of geological exploration. Comprising the following steps: collecting geological data and geophysical logging data of a cretaceous system stratum in a target area, and determining a stratum section of a to-be-identified marker bed; the method comprises the following steps: on the basis of determining a stratum section of a to-be-identified marker bed, obtaining logging response characteristics of mudstone and calcareous sandstone, and establishing a marker bed identification model; and interpreting the logging curve by using the marker bed identification model, identifying mudstone and calcareous sandstone marker beds, and verifying the regional distribution stability. According to the method, through the combined response characteristics of the apparent resistivity, the apparent density and the natural potential, the mudstone layer and the calcareous sandstone layer are accurately distinguished, and the spatial positions of the mudstone layer and the calcareous sandstone layer are determined, so that the problems of low marker bed identification efficiency, dependence on manpower and poor regional adaptability in the prior art are solved.

The invention relates to a method and device for calculating the buried height of a blind pipe, and the method comprises the steps: calculating the unit sand amount accumulated in unit time according to the sand removal displacement, the sand removal sand ratio and the apparent density of a proppant; the starting time for starting sand removal and the ending time for ending sand removal are recorded, and the sand removal time is calculated according to the starting time and the ending time; according to the sand removal time and the unit sand amount, the total sand amount accumulated in the annulus between the blind pipe and the casing pipe in the time period is calculated; and calculating the buried height of the blind pipe according to the total sand amount and the density of the proppant body. Compared with the prior art, the method has the advantages that parameters such as proppant permeability and liquid viscosity required by a Darcy formula do not need to be obtained, so that the parameters are easier to obtain, the calculation speed is higher, and the calculation difficulty is reduced while the accuracy is improved.

The invention belongs to the technical field of building construction, and discloses a concrete layered stacking parameter determination method. The concrete layered stacking parameter determination method comprises the following steps: obtaining a first friction coefficient mu of a bottom structure surface, an apparent density rho of concrete and known stacking parameters of a concrete layer according to a building construction scheme; obtaining a to-be-calculated stacking parameter of the concrete layer according to tau y = rhogh (sin alpha-mu cos alpha); the known stacking parameters comprise any two of the preset yield stress tau y of the concrete layer, the preset layer thickness h of the concrete layer and the preset inclination angle alpha of the concrete layer, and the to-be-calculated stacking parameters comprise the other one of the preset yield stress, the preset layer thickness and the preset inclination angle except the two of the known stacking parameters. According to the method for determining the layered stacking parameters of the concrete, the relation between the yield stress and the inclination angle and the thickness is established, and the influence of friction force between the concrete and the bottom structure is fully considered.