92 results about "Compressive strength test" patented technology

The invention relates to the technical field of geotechnical engineering material modification and industrial solid waste resource utilization, in particular to an industrial solid waste curing agent formula screening method for salinized loess improvement, which comprises the following steps: constructing a curing system with different industrial solid waste (such as fly ash, slag and steel slag) composite proportions, identifying the salt type and salt concentration of salinized loess, and determining the salt concentration of the salinized loess. The method comprises the following steps: preparing, maintaining and curing a sample, carrying out unconfined compressive strength test and X-ray diffraction (XRD) analysis, extracting peak areas of main reaction products, and calculating a structure-performance coupling mechanism index Mi = S / f7 (S is the XRD peak area, and f7 is the compressive strength of 7 days). The Mi value and the 28-day strength are used as judgment criteria, and a preferable formula with good structural product master control and strength development is screened out. The screening method provided by the invention has the advantages of distinguishable mechanism, quantifiable index, generalizable process and the like, and is suitable for formula design and engineering application of the industrial solid waste-based curing agent under the conditions of different salt concentrations and ion types.

The invention discloses a performance detection method and system for ultra-high performance concrete, particularly relates to the technical field of building material performance detection, and aims to solve the problem of strength test discreteness caused by neglecting of an aging effect after high-temperature maintenance in an existing detection method. The method comprises the following steps: recording a first time point when a test piece is cooled at room temperature and a second time point when a press machine is loaded, and generating a comprehensive aging factor in combination with double quantitative analysis of a fiber pull-out fragment proportion and a crack fractal dimension in a damage process image; matching a strength correction coefficient from a preset table according to the aging factor, and dynamically calibrating a first compressive strength test result; accurate association between the aging damage mechanism and the macroscopic strength is achieved, and the reliability evaluation precision of the ultra-high performance concrete in major engineering is remarkably improved.

The invention discloses a mixing design-based ratio optimization method for a multi-source solid waste cementing material containing alkaline residues, which is used for optimizing to obtain an optimal ratio of five solid waste components according to a preset cementing material performance target, the alkaline residues are used as an alkaline excitation component, a D optimal mixing design method is adopted to determine a test point, a three-order normative polynomial model is established, and the optimal ratio of the five solid waste components is obtained. Setting constraint conditions of each solid waste component, testing the three-day compressive strength and 28-day compressive strength of the neat paste for each test point, obtaining a first fitting model based on compressive strength response and a second fitting model based on response according to test data, and according to a preset performance target, the first fitting model and the second fitting model, calculating the compressive strength of the neat paste according to the first fitting model and the second fitting model. Solving through a multi-objective optimization algorithm to obtain an optimal proportion of five solid waste components; according to the method, the problems of low efficiency and high cost of a traditional trial and error method are solved, and scientization and standardization of the proportion design of the multi-source solid waste cementing material are realized.

The invention relates to the technical field of asphalt concrete detection, in particular to an asphalt concrete strength detection device which comprises a press machine, an upper pressing plate and a lower placing table, the protective cover is movably arranged in a base of the press machine; the gas injection mechanism is linked with the protective cover and is driven by the upward movement of the protective cover; the annular air bag is arranged on the periphery of the lower placement table and communicated with the air injection mechanism, automatic centering of the concrete sample is achieved through radial pushing of the annular air bag, and the problem that it is difficult to guarantee that the sample and the pressing plate are strictly coaxial through traditional manual placement is solved; the air bag is completely deflated and shrunk before being pressurized and is separated from the side wall of the sample, so that the interference of lateral supporting force on a detection result is thoroughly eliminated, the phenomenon that the strength value is virtually high due to constraint stress is avoided, and the accuracy and repeatability of the compressive strength test are effectively improved.

The invention discloses a chitin-silicon-calcium-based modified material for rammed earth wall repair and a weather resistance evaluation method thereof, and belongs to the technical field of rammed earth wall repair, the chitin-silicon-calcium-based modified material comprises metakaolin, calcium oxide, quartz and chitin; the ratio of chitin to metakaolin to calcium oxide to quartz is 1: 1: 2: 4; the method comprises the following steps: pre-treating at the earlier stage of a test, evaluating freeze-thaw cycle performance, evaluating dry-wet cycle performance, evaluating salt corrosion resistance, analyzing association between a microstructure and a strength performance, and finally, revealing a material degradation rule and mechanism by combining scanning electron microscope observation, unconfined compressive strength test and crack rate analysis. When the freezing and thawing cycle number N is less than or equal to 5, the dry and wet cycle number I is less than or equal to 9, and the salt solution concentration c is less than or equal to 0.3 mol / L, the characteristics of freezing and thawing resistance, dry and wet resistance, salt erosion resistance and the like of the modified material are obviously improved; after the modified material is added, internal pores of plain soil can be filled, unconfined compressive strength of a soil body is enhanced, and long-term durability of the soil body is improved.

The application discloses a kind of quick detection methods of mineral powder activity.The steps are: taking activating agent and water configuration activation solution, according to GB / T 17671 "cement mortar strength test method" method, activation solution, mineral powder and sand are prepared and test block is formed, and after 15-17h in standard mortar curing box, formwork is dismantled, again, it is placed into oven and is maintained 6-8h after film coating, cooling to room temperature carries out compressive strength test, and the activity index of mineral powder is calculated by the calculation formula of compressive strength and activity index.The application utilizes alkali-sulfate and seed compound excitation characteristics, and combines high-temperature rapid curing system to quickly stimulate mineral powder activity, effectively shortens mineral powder hydration period, and the activity index detection time is shortened from original 28d to 1d by test block compressive strength, greatly improves mineral powder activity index detection efficiency, and accuracy is higher, and is suitable for promotion and application.

This invention discloses a method for obtaining the strength of a pillar considering friction factors, comprising: preparing rock samples with different aspect ratios and configuring contact surface materials with different tribological properties; determining the cohesion and friction coefficient of each contact surface material through shear testing, conducting compressive strength tests on rock samples with different contact surface materials to obtain rock sample strength data under different friction levels and aspect ratios; selecting a pillar strength calculation formula corresponding to the actual contact conditions between the pillar and the surrounding rock, calculating the strength of the target pillar under design conditions, and calculating the load on the pillar itself based on the pillar area bearing theory; calculating the pillar safety factor based on the pillar strength and the load, and optimizing the pillar design accordingly.

This invention discloses a concrete sample compressive strength testing device, relating to the field of concrete testing technology. It includes a base plate, with a testing cylinder and a vertical rod fixedly connected to the upper side of the base plate. A top plate is fixedly connected to the upper end of the vertical rod, and a hydraulic cylinder is fixedly connected to the upper side of the top plate. A cleaning unit is provided at the lower output end of the hydraulic cylinder. The cleaning unit includes a fixed frame, which is fixedly connected to the lower output end of the hydraulic cylinder. A fixed cylinder is fixedly connected to the lower side of the fixed frame, and a rotating shaft is rotatably connected to the inner side of the fixed cylinder. A mounting plate is fixedly connected to the lower end of the rotating shaft. This concrete sample compressive strength testing device uses a hydraulic cylinder to control the descent of the testing head to test the concrete sample. After testing, the testing head is controlled to rise, bringing a flexible scraper into contact with the testing head, and the testing head is controlled to rotate, cleaning debris from the surface of the testing head. The operation is simple and convenient for subsequent tests.

The present application relates to the technical field of geological exploration, and discloses a rock mass compressive strength testing device, which comprises a rack, a working chamber is formed in the rack, a hydraulic cylinder is installed on the top of the rack, the output end of the hydraulic cylinder is located in the working chamber, and a pressing head is installed on the output end of the hydraulic cylinder; a placing table is installed on the bottom of the rack and used for placing a sample; and an automatic placing assembly is installed on the placing table and used for automatically moving the sample to the center of the top surface of the placing table. The present application can automatically adjust the position of the sample, quickly place the sample on the detection position on the placing table, and is safe and reliable to use, and the present application can conveniently clean the surface of the placing table, avoid the surface of the placing table from being covered with rock particles, and is more convenient to use.

The utility model relates to the technical field of test devices, and discloses a cement compressive strength test device, which solves the problems that the existing test device lacks a protective structure and is inconvenient to clean cement disintegrating slag, and comprises a support frame, and a cement placing table is fixedly arranged in the middle of the bottom end in the support frame; a protective sleeve slidably connected with the supporting frame is arranged at the top of the cement placing table, a hydraulic rod penetrates through the middle of the top end of the supporting frame, a pressing seat fixedly connected with the hydraulic rod is arranged at the top end in the supporting frame, and a control panel is fixedly arranged on one side of the supporting frame. The cement placing table is composed of a central pressure-bearing supporting seat, a square frame, four connecting seats and four flow guide covers; by means of the testing device, safety protection can be achieved, and meanwhile cement disintegrating slag can be conveniently cleaned.

The utility model relates to the technical field of sheet metal part detection, and discloses an automobile sheet metal part compressive strength test fixture which comprises a shell, a lining pipe frame is connected to the top end of the inner wall of the shell, a partition plate is connected between the outer surface of the lining pipe frame and the inner side of the shell, and a driving motor is connected to one side of the inner wall of the lining pipe frame. The output end of the driving motor is connected with a lead screw, one end of the lead screw is connected with a traction frame, a plurality of connecting rods are rotationally arranged on the outer ring of the traction frame, and the bottom end of the partition plate is connected with a plurality of sets of sliding rods. Through the arrangement of the multiple clamping mechanisms and the extrusion mechanisms, sheet metal parts in special shapes can be effectively limited and fixed, the application range is effectively widened, meanwhile, the top faces of the sheet metal parts are pressed downwards through the lower frame clamping plates, the bottom faces of the sheet metal parts are jacked upwards through the extrusion mechanisms, the fixing effect is guaranteed, the overall fixing mode of the device is automatic, and the production efficiency is improved. Operation is easy, using is convenient, manpower consumption is greatly reduced, and the using requirement is met.

This invention relates to the field of paper testing, and more particularly to a compressive strength testing device for kraft paper production. The device includes a testing platform with top frames fixed to both sides of its upper end. Support rods are fixed between the upper end of the testing platform and the top frames. A set of flattening rollers is rotatably mounted on the upper end of the top frames. Kraft paper passes through the gaps between the flattening rollers. A set of clamping plates is provided at both the upper and lower ends inside the top frames. The clamping plates are installed in clamping brackets at both ends, with the upper clamping bracket fixed to the top frame and the lower clamping bracket slidably mounted on the support rods at both ends. A pressure-applying component is provided on one side of the top frame, and a testing component is provided below the testing platform. This invention utilizes a single testing device to simultaneously perform tensile and compressive strength tests on kraft paper, achieving high testing accuracy and good testing results. Furthermore, it effectively prevents the clamping plates from loosening during testing, thereby greatly improving the clamping stability of the kraft paper and preventing it from loosening and detaching.

This invention relates to the field of cement building materials technology, specifically disclosing a method for improving the strength of silicate clinker based on mineral and crystal composition analysis. The method involves collecting 3-day and 28-day compressive strength test data of silicate clinker and quantitatively analyzing the mineral and crystal composition data using XRD. A mineral composition and strength zoning statistical method is employed to obtain appropriate C3S or C2S content to maintain a relatively good overall level of 3-day and 28-day compressive strength of the clinker. Then, a stepwise multiple linear regression analysis is used to establish the relationship between the 3-day and 28-day compressive strength of the clinker, clinker liter weight, f-CaO, the content of other chemical components, and the mineral composition and crystal content of the clinker. Specific analytical methods are used to determine optimization measures, further optimizing and improving the clinker strength. Using the above method, the 3-day and 28-day compressive strength of silicate clinker can be improved simultaneously.

The utility model discloses a concrete brick sample preparation mold, which relates to the technical field of brick sample preparation molds, and comprises a mold body, a rotating piece and a flattening assembly are rotatably connected on the mold body, the flattening assembly is arranged in the mold body, the flattening assembly comprises a shifting block rotatably connected with the mold body, a first transmission rod is fixedly connected on the shifting block, and a second transmission rod is fixedly connected on the first transmission rod. The first transmission rod is slidably connected with a sliding rod, the first transmission rod is fixedly connected with a limiting plate, the limiting plate is fixedly connected with a universal joint, the universal joint on the limiting plate is fixedly connected with a second transmission rod, the second transmission rod is slidably connected with a third transmission rod, and the third transmission rod is slidably connected with a first connecting rod. The first connecting rod is slidably connected with the roller, so that a test piece with a uniform standard is provided for subsequent compressive strength test, brick samples manufactured by different batches and different operators have an accurate and comparable foundation, and the accuracy of real quality level measurement of bricks is greatly improved.

The application discloses a kind of column strength testing device and its using method, the device includes: test operating platform, with bottom plate and the two vertical walls being arranged at both ends of bottom plate;Two clamping components are respectively slidably arranged on two vertical walls, for clamping the two ends of the column to be measured;Compression strength test component cooperates with two clamping components, at least including the pressing block provided with pressure sensor and the laser displacement sensor being arranged directly below pressing block, for measuring the pressure and deformation that the column to be measured bears;Anti-torsion test component is rotatably connected with one end of the column to be measured, for measuring the torsional force that the column to be measured receives, wherein the other end of the column to be measured is fixed;Strain gauge fixing component cooperates with anti-torsion test component, and is connected with the column to be measured, for measuring the deformation generated after the column to be measured receives torsional force.The measurement result of the embodiment of the application is accurate.

The application discloses a kind of based on mix design's containing alkali residue multi-source solid waste cementing material proportioning optimization method, for obtaining the best five kinds of solid waste component proportion according to preset cementing material performance target, wherein alkali residue is used as alkaline excitation component, determines test point using D optimal mix design method, establishes three-order standard polynomial model, sets the constraint condition of each solid waste component, carries out net paste 3 days compressive strength and 28 days compressive strength test to each test point, obtains the first fitting model based on compressive strength response and the second fitting model based on response according to test data, according to preset performance target, according to the first fitting model and the second fitting model, the optimal five kinds of solid waste component proportion are obtained by solving using multi-objective optimization algorithm;The method solves the problems of low efficiency and high cost of traditional trial-and-error method, realizes the scientization and standardization of multi-source solid waste cementing material proportioning design.

The present application relates to the technical field of compressive strength test, and particularly relates to a concrete compressive strength detection method based on ultrasonic rebound method.The present application divides the surface of concrete structure into several concrete regions and arranges corresponding measuring points, respectively collects ultrasonic signals and surface rebound values of each measuring point, calculates concrete pressure characteristic value, determines whether the concrete of concrete region is abnormal, carries out secondary measurement, and generates several compressive strength values, uploads the abnormal compressive strength values of each abnormal concrete region to a pre-constructed compressive strength value library for comparative analysis, determines whether the compressive strength of abnormal concrete region is qualified based on the comparative analysis result, and classifies the reasons for unqualified compressive strength of abnormal concrete region based on dimensional characteristic index and sends corresponding alarm signals.The present application improves the accuracy of concrete compressive strength detection through ultrasonic rebound method detection and analysis of each concrete region.

The utility model discloses a kind of specimen forming auxiliary devices for unconfined compressive strength test, belong to specimen forming auxiliary technical field.The utility model specimen forming auxiliary device, the bottom inside of test mould cylinder is inserted with the bottom pad block compatible with it, the bottom inside of test mould cylinder is opened with annular clamping slot corresponding bottom pad block, bottom pad block is opened with multiple sliding cavities corresponding annular clamping slot circumference, sliding cavity is slidably connected with the male head compatible with it, spring is equipped between the tail end of male head and the end arm of sliding cavity, the tail end of male head is equipped with the recessed cavity for spring insertion, bottom pad block protrudes test mould cylinder bottom surface, male head is inserted annular clamping slot and is compatible with annular clamping slot, the top inside of test mould cylinder is inserted with the top pad block compatible with it, bottom pad block is inserted into test mould cylinder, male head is inserted into annular clamping slot by spring drive, forms positioning limiting effect, test mould cylinder is propped up, without extra increase pad plate.

The utility model relates to a solder ball production intensity detection device which is used for carrying out compressive strength test on solder balls, the solder balls are welded on a test substrate, the solder ball production intensity detection device comprises a supporting structure, the supporting structure comprises a machine table, a base is arranged below the machine table, and the base and the machine table are connected and fixed through a stand column; a detection table for placing a test substrate is rotatably connected to the center of the machine table, and at least two groups of stations are arranged on the detection table; the driving structure is arranged on the base and is used for driving the detection table to rotate; the detection structure comprises a support, and a detection part is arranged on the support in a lifting mode; and a discharging structure. According to the solder ball production intensity detection device, when the detection structure is used for carrying out compression resistance detection on the solder balls on the test substrate at the detection point positions, an operator can carry out feeding at the feeding point positions, orderly detection is not interfered, discharging is completed through the discharging structure, the working process continuity is high, and semi-automatic continuous detection is achieved.

The utility model discloses concrete fracture resistance and compression resistance test equipment, which relates to the technical field of concrete detection and comprises a fixed base, hydraulic cylinder mechanisms fixedly connected above the left side and the right side of the fixed base, a movable working table slidably connected to the inner wall above the fixed base, and a rotating mechanism in threaded connection to the inner wall below the movable working table. And the lower portion of the rotating mechanism is fixedly connected with the upper portion of the fixed base, and the front side and the rear side of the upper portion of the fixed base are fixedly connected with clamping mechanisms. According to the utility model, the movable working table is matched with the rotating mechanism to adapt to concrete test pieces with various lengths and be compatible with various types of tests, so that the problem that the equipment is incompatible due to different sizes of the test pieces is effectively solved, and the equipment can be used for both a bending test and a compression test, so that the test efficiency is improved. And test bodies with different sizes can be fixed through the clamping mechanism, so that the test is carried out under a stable condition, and the reliability of test data is improved.

The application relates to an artificial intelligence technology and discloses a ceramic product performance detection method, which comprises the following steps: measuring the first weight of a ceramic product, measuring the drainage volume of the ceramic product after being immersed in a water pool to calculate the density of the ceramic product, measuring the second weight of the ceramic product after being immersed in the water pool, calculating the water absorption performance according to the first weight and the drainage volume, calculating the wear resistance of the ceramic product by measuring the weight of the ceramic product after being polished, testing the compressive strength of the ceramic product by using a pressure loading device to obtain the maximum compressive strength, and judging whether the ceramic product meets preset performance indexes according to the measured density, water absorption performance, wear resistance and maximum compressive strength. The application further discloses a ceramic product performance detection system. The application can improve the efficiency of ceramic product performance detection and make the detection more comprehensive.

The invention provides a concrete compression test behavior monitoring method, a memory and a monitoring system. The concrete compression test behavior monitoring method comprises the following steps: acquiring a multi-source original signal in real time so as to judge whether a pressure relief behavior occurs or not based on the multi-source original signal; when the pressure relief behavior occurs, key features are extracted, and the key features at least comprise key time points and corner cut features; and obtaining a primary monitoring result based on the key time point, and obtaining a secondary monitoring result based on the corner cut characteristics, so as to obtain a compliance monitoring result of the concrete compression test behavior in combination with the primary monitoring result and the secondary monitoring result. According to the invention, accurate, automatic and real-time identification of man-made illegal pressure relief behaviors in the concrete compression test from'action intention 'to'data expression' is realized, and the technical problem that the prior art cannot cope with hidden and simulated data fraud behaviors is fundamentally solved.

This utility model discloses a compressive strength testing device for cement-modified mudstone. The device includes a base, a test plate on the upper surface of the base, a pressure sensor fixed at the connection between the lower surface of the test plate and the upper surface of the base, and top frames fixedly installed at both ends of the upper surface of the base. Two cylinders are fixedly installed at the top of the top frames, and pressure plates are fixedly installed inside the top frames at the ends of the two cylinders. By designing a cleaning and scraping mechanism, when cement particles remain on the surfaces of the pressure plates and test plates after testing, the moving frame and scraper can be stably moved so that the scrapers on both sides contact the surfaces of the test plates and pressure plates respectively to scrape and clean them. This facilitates cleaning, and allows for accurate testing of mudstone placed stably on the surface of the test plate during subsequent tests. This improves the convenience and accuracy of cleaning the main body of the compressive strength testing device during cement-modified mudstone compressive strength testing.

The invention discloses a well drilling rock debris curing agent for road building and a preparation method and a using method thereof.The well drilling rock debris curing agent for road building is prepared from, by mass, 45-55% of cement, 10-20% of granulated blast furnace slag powder, 15-25% of fly ash, 5-10% of lime, 1-2% of anhydrous aluminum potassium sulfate and 1-10% of sodium silicate. The preparation method comprises: 1, taking raw materials according to mass percentage; and 2, mixing the raw materials in the step 1, uniformly stirring, grinding to 80 mu m, sieving, and uniformly stirring after the sieve residue is less than 10% to obtain the drilling rock debris curing agent for road building. The method comprises the following steps: carrying out a compaction test by using dry-based drilling cuttings and a curing agent accounting for 10% of the mass of the dry-based drilling cuttings, forming an unconfined test piece, carrying out an unconfined compressive strength test for 7 days, and paving a roadbed according to a test result. The consolidation strength meets the requirement of the strength grade 2.0 in the CJJ / T286-2018 Soil Solidifier Application Technical Standard, and can be used for roadbed pavement to reduce the stacking of the roadbed.

The invention relates to an unconfined compressive strength testing device and method for a 3D printing concrete wet blank, and belongs to the technical field of concrete compression tests. The device comprises a hollow cylindrical mold building cylinder and a hollow cylindrical positioning cylinder; at least two vertical track keys are arranged on the outer wall of the mold building cylinder, and two grippers are symmetrically arranged at the top of the outer wall of the mold building cylinder; and the positioning cylinder is sleeved outside the mold building cylinder, the inner wall of the positioning cylinder is provided with a track groove matched with the track key, and the positioning cylinder and the track key are in sliding fit to form a guide track system to ensure that the mold building cylinder moves along a strict vertical path during demolding. The lower end of the positioning cylinder extends outwards to form at least three positioning legs with positioning scales, and the positioning legs are used for being matched with centering marks on a lower loading plate of the press machine, so that the whole device is accurately positioned in the center of the loading plate. The whole process greatly reduces manual operation errors and subjective judgment, so that the test result is more accurate, the repeatability is higher, and standardized popularization is facilitated.

The invention relates to the technical field of compressive strength testing, in particular to a concrete compressive strength detection method based on an ultrasonic rebound method. The surface of the concrete structure is divided into a plurality of concrete areas, corresponding measuring points are arranged, and ultrasonic signals and surface rebound values of the measuring points are collected; calculating a concrete pressure characteristic value, and judging whether the concrete in the concrete area is abnormal or not; carrying out secondary measurement, and generating a plurality of compression resistance characterization values; uploading the abnormal compression resistance characterization value of each abnormal concrete area to a pre-constructed compression resistance characterization value library for contrastive analysis, and judging whether the compression strength of the abnormal concrete area is qualified or not based on a contrastive analysis result; and based on the dimension characteristic indexes, reasons for unqualified compressive strength of the abnormal concrete area are classified, and corresponding alarm signals are sent out. According to the method, each concrete area is detected and analyzed by the ultrasonic rebound method, so that the detection accuracy of the concrete compressive strength is improved.

The invention discloses a preparation method of a hydraulic cementing material for synergistically recycling coal gangue and mine water concentrated carnallite. According to the method, mine water carnallite, coal gangue, kaolin, calcium oxide and water are taken as main raw materials, firstly, metakaolin with potential activity is obtained by calcining the kaolin, then the proportion of the mine water carnallite, the metakaolin, the calcium oxide and the water is optimized by adopting an orthogonal experiment method, and the hydraulic cementing material with good mechanical properties is prepared. And an optimal ratio is determined through a compressive strength test. And then coal gangue is introduced as aggregate, so that the overall structural stability and compressive property of the material are further improved. According to the method, sulfate radicals in the mine water carnallite react with calcium oxide to generate stable hydration products such as ettringite, the gelling performance is improved, resource utilization of coal gangue is achieved, and a stable curing system is formed. The method has good hydraulicity, environmental adaptability and solid waste co-processing potential, and is suitable for the fields of industrial solid waste resource utilization and green cementing material development.

The invention discloses a method for determining design mix proportion parameter indexes of fluid-state solidified soil, which comprises the following steps of: firstly, determining a low-value / high-value water-solid ratio and a lime-soil ratio of a mixture sample according to a raw material soil liquid limit and engineering experience, respectively preparing four mixture samples, then carrying out fluidity, bleeding rate and solidification compressive strength tests, and finally determining the design mix proportion parameter indexes of the fluid-state solidified soil according to the fluidity, bleeding rate and solidification compressive strength tests. The method comprises the following steps: respectively establishing functional relationships between fluidity, bleeding rate and curing compressive strength of corresponding parameter index samples and a water-solid ratio and a lime-soil ratio, and finally, on the basis of a fluidity limit value, a bleeding rate limit value, a curing compressive strength limit value and a minimum lime-soil ratio requirement of mix proportion design, according to a low-value curing agent blending principle; and determining key parameters of the design mix proportion of the flow-state solidified soil. The method can quantitatively reflect the influence of the blending amount of the mixing water and the curing agent on the fluidity, bleeding rate and curing compressive strength of the mixture in the composition of the fluid-state solidified soil material, and can realize reasonable determination of the design mix proportion parameter index of the fluid-state solidified soil influenced by multiple factors only by carrying out a small amount of test work of a sample.

The invention relates to a coal gangue coarse aggregate strength test method for a lime-fly ash stabilized base, and belongs to the technical field of highway engineering. According to the test method, the coal gangue soaking compressive strength R is adopted as an index for judging the mechanical property of the coal gangue coarse aggregate, and the applicability of the coal gangue coarse aggregate is further verified through a two-ash stabilized base mixture 28d unconfined compressive strength test. When R is greater than or equal to 4 * Rdmin, preliminarily judging that the strength of the coal gangue coarse aggregate is qualified; otherwise, judging that the product is unqualified; after preliminary judgment is qualified, the applicability of the strength of the coal gangue coarse aggregate is further verified through 7d and 28d unconfined compressive strength tests. According to the method, the correct test method and index are adopted, scientific test judgment is conducted on the applicability of the coal gangue coarse aggregate in the lime-fly ash stabilized aggregate base layer, the coal gangue coarse aggregate can be used up under the condition that the quality of the lime-fly ash stabilized coal gangue coarse aggregate base layer is guaranteed, and opportunities are provided for reducing the cost of the lime-fly ash stabilized base layer and protecting the environment as much as possible.