43 results about "Mixture designs" patented technology

The invention proposes a bituminous mixture proportion design method based on tightest state. The method includes that: (1) three parameters for evaluating the tightness of mixture mineral aggregate are determined, including the voidage of mineral aggregate , the voidage of coarse mineral aggregate and the mixture mineral aggregate dry density; (2) the relevance of the three parameters are demonstrated, the secondary curvature model is adopted for analysis to determine the extreme values of the corresponding parameter curvatures as the tightest state of the mixture; (3) the oilstone ratios corresponding to the extreme values of the parameters are selected, namely the oilstone ratios corresponding to the maximums of the voidage of mineral aggregate VMA and the voidage of coarse mineral aggregate VCA, and the oilstone ratio corresponding to the maximum of mineral aggregate dry density, and the oilstone ratios correspond to the tightest state of the mixture; (4) for reducing error, the average value of the three oilstone ratios is used as the design oilstone ratio. The invention is applicable to coarse aggregate gap-graded bituminous mixture and ensures the bituminous mixture designed by the invention to have good road performance.

The invention relates to a vibration-molding-based cement stabilized macadam mixing ratio design method, which comprises the following steps: (1) preparing optimized dense skeleton type graded aggregate; (2) adding cement into the graded aggregate to prepare cement stabilized macadam mixture; (3) vibrating and compacting the cement stabilized macadam mixture, and determining the optimal water content and the maximum dry density of the cement stabilized macadam mixture in mode of a vibration and compaction test; (4), preparing cement stabilized macadam cylindrical test pieces by using a vibration molding test process at a compactness of 98 percent under the determined maximum dry density and the optimal water content; and (5) perform an unconfined compression test on the prepared cement stabilized macadam cylindrical test pieces and determining the dose of the cement according to the result of the unconfined compression test. The cement stabilized macadam mixture designed by the invention has the characteristics of high strength, high crack resistance, convenience for construction and low cost, and an innovation is made in semi-rigid material design on the basis of a material design guiding ideology.

Disclosed are wax emulsion compositions for curing or sealing concrete and cement formulations, methods for preparing and processes for using the same. The modifiers are applicable to curing or sealing membranes, used in roadways, highways, parking lots and other freshly placed or poured concrete surfaces to retain moisture and achieve high compressive strengths. This invention also relates to materials used to coat, spray, brush, roll etc. on conventional Portland cement concrete mix designs or other applied concrete mixes in formed structural shapes and transport road mix designs, providing an effective layer that controls and minimizes moisture loss from the mix to enable proper curing and achievement of desired compressive strengths. The compositions of the invention further provide for concrete and cement formulations having lower water soluble chloride content.

The invention relates to a novel method for measuring wax-sealed bulk volume density of a wax seal measuring asphalt mixture, and belongs to the technical field of road asphalt mixture design. Through forming a wax film with definite thickness on the surface of an asphalt mixture test piece to wrap all opening apertures on the surface inside the wax film, a test piece volume comprising stone, asphalt, closed aperture and open aperture is formed, namely, a needed real volume, so that the test result is more real and reliable, and accuracy of mix design of the asphalt mixture is effectively ensured. The method can effectively unify the densities of the asphalt mixtures in different aperture ranges, and avoid inconvenience that the prior asphalt mixtures in the different aperture ranges need to adopt different density measuring methods.

The invention discloses an automatic production device of an environmental protection antibiotic-free fermented?feed. The automatic production device comprises a cleaning system, a crushing system, a feed proportioning system, a microbe?solution injection system, a mixing system and a packaging system, wherein the discharge port of the cleaning system is connected with the feed port of the crushing system, the discharge port of the crushing system is connected with the feed port of the feed proportioning system, the discharge port of the feed proportioning system is connected with the solid-material feed port of the mixing system, the discharge port of the microbe solution injection system, the discharge port of the microbe solution injection system is connected with the microbe solution feed port f the mixing system, and the discharge port of the mixing system is connected with the packaging system. The automatic production device has advantages of convenient operation, safe and reliable use, environmental protection, and no pollution. The special process design concept?is adopted, the solid and solution mixture design is utilized, the feed is packaged and then fermented, the production package mode, artificial stacking?fermentation, of the traditional production is changed, and the computer automatic control way is adopted, so as to achieve perfect automatic production of the antibiotic-free fermented?feed.

Disclosed are wax emulsion modifiers for concrete and cement formulations and methods for preparing the same. The modifiers are applicable to roller compacted concrete (RCC), used for manufacturing of industrial floor slabs, dams and roads. This invention also relates to conventional Portland cement concrete mix designs or other applied concrete mixes for formed structural shapes and transport road mix designs, providing a more rapid dehydration of the aqueous phase, without sacrificing strength, yet providing a higher density that remains workable at the point of application. The modifier of the invention may be utilized for either the initial soil/cement base or for the final/finished placement.

The invention relates to a method for designing mixing ratio of construction waste for asphalt mixture, which comprises the following steps of: utilizing suitable waste source, establishing a buildinggarbage crushing model and a crushing process, and proposing a new crushing process; a recycled aggregate is obtained through the new crushing process, the corresponding matching ratio design is carried out, the design of the index data is detected to meet the latest specification requirement, then, the test data is used to optimize the gradation design, and RCA with different dosage is used to replace part of raw materials in road construction, and the possibility and feasibility of the construction waste for the asphalt mixture design are ensured; in this way, replacing the natural crushedstone with the construction waste generated by the waste building, which is used as the main raw material of the road construction; not only can the resources be saved, but also the influence of the construction waste on the environment can be relieved, the problem of insufficient supply of the natural aggregate in the construction process can be relieved to a certain extent, and the supply of high-quality aggregate is provided; the method has a remarkable environmental protection meaning, economic significance and social benefit.

The invention discloses a method for designing an AC-20 asphalt mixture, which adopts a vertical vibrating method to design and comprises the steps of selecting and testing raw materials, designing mineral aggregate gradation, determining the optimal asphalt-aggregate ratio, testing performance and the like. Experimental verification shows that the asphalt mixture designed by the method has good pavement performance and a small use quantity of asphalt and is simple and convenient to operate; and asphalt can be saved by 8 percent to 10 percent.

The invention provides a proportioning design method of an asphalt mixture through construction waste. The construction waste asphalt mixture designed through the method is applicable to asphalt surfaces of highways and urban roads. Recycling of the construction waste is achieved, and pollution caused by urban and rural solid waste is reduced. The proportioning design of the construction waste asphalt mixture is conducted through a three-stage design method. Firstly, the mixture gradation design is conducted through a substitution method; and secondly, the best asphalt use amount of the asphalt mixture is determined through a new design method. The second step is divided into three steps that (1) feasible regions of the best asphalt use amount in different gradation schemes are determined through a Fort shellen leakage analysis test and a Cantabro raveling test; (2) according to the two end boundary values and the intermediate value of the feasible regions of the asphalt use amount, the asphalt mixture is formed through three asphalt use amounts; and (3) whether the asphalt mixture meets the basic performance requirements or not is judged. Finally, the asphalt mixture is formed under the condition of the best asphalt use amount, and pavement performance detection is conducted.

The invention discloses a mixture proportion design method for the cold regeneration of foamed asphalt with an internal friction angle and cohesive force. The method includes the steps of according tothe internal friction angle measured by a direct shear test or a triaxial compression test, determining the optimum gradation of a recycled material; after determining the optimum foaming condition of asphalt, selecting 3-4 different kinds of foamed asphalt dosages, using a compaction test to determine the optimum water content; molding under the optimum water content, soaking in water to keep araw test-piece, and determining the optimum foamed asphalt dosage by using the cohesive force obtained by the triaxial compression test; according to the optimum foamed asphalt dosage and the optimumgradation of the recycled material, determining the mixture proportion design of the cold regeneration of the foamed asphalt. The method has the advantages that compared with the existing foamed asphalt mixture design method based on dry-wet splitting strength, material tensile strength is considered, and meanwhile two uppermost destructional modes in the use process of the foamed asphalt mixtureare considered more contrapuntally, wherein the modes includes water damage and permanent deformation caused by continuous accumulation of shear strain.

The invention discloses an asphalt mixture grading design method based on grading interlocking and voids in mineral aggregate. The method comprises the steps of 1, collecting local existing mixture design grading data, and solving parameters in a prediction model for voids in mineral aggregate according to interlocking theoretical planning; 2, detecting aggregate physics of each level, wherein bulk density, dry density and grading are included; 3, according to the standard requirement, performing primary grading, or performing selection by referring to past experience; 4, according to the prediction model for voids in mineral aggregate, working out the voids in mineral aggregate of primary grading; 5, comparing whether the voids in mineral aggregate meet the standard requirement or not; 6,according to the water absorption rate and the oil absorption rate of the aggregate, calculating the asphalt amount. By considering filling and interlocking characteristics of the aggregate as a starting point, the theoretical basis is built through discrete element numerical simulation, the specific engineering project is optimized by applying a big data numerical analysis method, and the reasonable grading with the structural strength and stability is obtained.

Disclosed are wax emulsion compositions for curing or sealing concrete and cement formulations, methods for preparing and processes for using the same. The modifiers are applicable to curing or sealing membranes, used in roadways, highways, parking lots and other freshly placed or poured concrete surfaces to retain moisture and achieve high compressive strengths. This invention also relates to materials used to coat, spray, brush, roll, etc. on conventional Portland cement concrete mix designs or other applied concrete mixes in formed structural shapes and transport road mix designs, providing an effective layer that controls and minimizes moisture loss from the mix to enable proper curing and achievement of desired compressive strengths.

The invention proposes a method for predicting pyrolysis kinetic parameters of biomass. The method comprises the following steps of 1) performing optimization design on a proportion of three main components of the biomass by adopting an optimal mixture design method in a Design-Expert mixture experiment method; 2) performing a thermogravimetric experiment on each mixing sample, performing reactive kinetic parameter calculation on thermogravimetric experiment data of the three components in combination with a Coats-Redfern integral method, and establishing a mathematic model used for calculating the pyrolysis kinetic parameters of the biomass by adopting a Special Cubic regression model; and 3) substituting the proportion of main components in a to-be-tested substance into the established mathematic model, and predicting the pyrolysis kinetic parameters of the biomass of the to-be-tested substance. According to the method, a large amount of thermogravimetric experiments and complicated calculation processes required to be performed for calculating the kinetic parameters in a biomass pyrolysis research process are effectively avoided and reliable experimental and theoretical bases are provided for energy utilization of the biomass, control of a biomass thermochemical conversion and utilization process and optimization of a technological process.

The invention discloses a design method of an AC-25 asphalt mixture. The design method adopts a vertical vibration method and comprises the steps of raw material selection and testing, design of mineral aggregate gradation, determination of the optimal asphalt-aggregate ratio, detection of performances and the like. Experimental verification indicates that the asphalt mixture designed by the method has good pavement performance, is little in amount of asphalt and is simple and convenient to operate, and the asphalt can be saved by 8-10%.

The invention provides a toilet flushing system based on negative pressure drainage, the toilet flushing system includes a mechanical linkage device, a water tank, a wash basin, a wastewater treatment tank, a water inlet pipe of the water tank, a valve, a buoyancy rod, a floater, a plug, a diaphragm, a piston, a gas storage chamber, a contraction section, one one-way valve, a guide pipe, another one-way valve, a throat pipe, a siphon bend, a divergent section, a drainage pipe, and a toilet. The mechanical linkage device is connected with the water tank and a Venturi pipe, the water tank includes a tank body A and a tank body B, and the tank bodies of A and B are equipped with purified recycled water for life and tap water respectively. The throat of the Venturi pipe is connected with the siphon bend of the toilet. When the mechanical linkage device is triggered, the water of the tank body A flushes the toilet, at the same time, a jet flow is formed at the throat, and the momentum of the dirt discharged with the drainage is increased. Through the mixture design of the siphon and the Venturi pipe, the siphonage is formed when the flushing water is not large, the piston is mainly driven by the linkage device to pressurize the gas in the gas storage chamber, and a high velocity flowing fluid is formed in the throat so as to produce the adsorption effect.