44results about How to "Packed tightly" patented technology

The invention belongs to the field of thin films, and particularly discloses an atomic layer deposition method and a thin film prepared through the atomic layer deposition method. According to the deposition method, the reaction cavity, the two input pipeline systems, the outlet valve and the vacuum pump in the atomic layer deposition system are used for controlling precursor pulse deposition and inert gas purging conditions in the atomic deposition process, and the film deposition state is improved; the efficiency of purging and removing substances and impurity residues such as a precursor and a reaction product thereof is improved, the problem that the quality of a deposited film is affected by the impurity residues in a reaction system or on the surface of a sample in the film deposition process is avoided, the uniformity and compactness of film deposition and the coverage rate and conformal rate of a film on the surface of a base material hole are improved, the defects of the film are reduced, and the yield is improved. And the method can be applied to a substrate with a high aspect ratio structure to deposit the film, so that the purpose of manufacturing a large-size complicated special-shaped structure device is achieved.

The invention provides a cigarette case and a manufacturing process thereof. The cigarette case comprises a case body and a case cover comprising a damp-proof layer or a moisture-proof layer, whereinthe case body is made of paper pulp raw materials or plant fibers, a waterproof film is pasted to the outer surface and / or the inner surface of the case body, and the waterproof film can be attached to the outer surface and / or the inner surface of the case body in a hot melting manner. According to the cigarette case, excellent moisture resistance can be guaranteed while environment-friendly materials are used. Through the hot melting manner, tight fitting and wrapping of the case body by the waterproof film can be ensured.

The present disclosure relates to a continuous positive airway pressure, CPAP, system comprising: a flow generator including a blower that supplies breathable gas at pressure; a patient interface; and an air delivery conduit interconnecting the flow generator and the patient interface, the air delivery conduit including a conduit portion having an internal diameter of less than 19 mm.

This utility model relates to the field of cleaning equipment technology and discloses a suction-type leaf shredder, including a suction frame body with two suction nozzles. From bottom to top, each suction nozzle has a shredding mechanism, a fine shredding mechanism, a flow guiding mechanism, and an anti-fall mechanism. The shredding mechanism includes a gear motor mounted on the outside of the suction nozzle. A cutter shaft is fixedly connected to the output end of the gear motor, and the end of the cutter shaft away from the gear motor is rotatably connected to the inner wall of the suction nozzle. Multiple cutter sleeves are arranged on the outside of the cutter shaft. Through the cooperation of a compression plate and the shredding mechanism, the leaves are pre-compressed after being sucked in, effectively reducing the leaf volume and providing a more compact leaf accumulation for the subsequent shredding process. This avoids low shredding efficiency due to loose leaf volume, ensuring preliminary shaping and compaction of the leaves before entering the shredding area, and significantly improving shredding efficiency.

The utility model relates to the technical field of environment-friendly waste paperboard compression equipment, and discloses energy-saving environment-friendly waste paperboard compression equipment which comprises a compression box, a box frame is fixedly connected to the left side of the compression box, a door shaft is arranged on the front side of the box frame, and a box door is fixedly installed on the right side of the door shaft. A clamping base is fixedly connected to the front side of the box door, a door pin is arranged at the upper end of the clamping base, a control switch is fixedly installed on the right side of the compression box, and a main hydraulic cylinder and an auxiliary hydraulic cylinder are arranged in the compression box. According to the energy-saving and environment-friendly waste paperboard compression equipment, through the arrangement of the crushing mechanism, a driving motor can be used for driving a first gear and a second gear to rotate in an engaged mode, so that a first crushing roller and a second crushing roller are driven to crush waste paperboards, the waste paperboards are crushed into small blocks, and subsequent block pressing treatment is facilitated; when the small waste paper is compressed, the compression resistance can be reduced, the small waste paper can be stacked more tightly, gaps are reduced, and the compression ratio is increased.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

This invention discloses a medical limb warmer, relating to the field of medical limb warming. It includes an installation box containing a warming cylinder with multiple inclined heating holes. Multiple electric heating wires are fixedly connected inside the installation box, and a support frame and an airflow mechanism are fixedly connected inside the warming cylinder. The airflow mechanism agitates the heated air. This medical limb warmer, through the cooperation of the electric heating wires and the airflow mechanism, allows heated air to enter the warming cylinder at an initial velocity through the inclined heating holes, forming a circular flow. This improves the warming effect on the patient's limb. Simultaneously, the reciprocating motion of the extrusion plate compresses the air, causing the heated air inside the warming cylinder to circulate, mimicking blood flow and achieving fluidized warming. This further promotes blood circulation in the limb, significantly improving the warming effect while effectively preventing excessive heat and the risk of burns to the patient.

This application discloses a micro-expansion low-heat silicate cement-based concrete material, its preparation method, and its application, belonging to the field of concrete engineering technology. Each cubic meter of micro-expansion low-heat silicate cement-based concrete material comprises 78-92 kg of water, 82-161 kg of micro-expansion low-heat silicate cement, 28-105 kg of fly ash, 476-608 kg of sand, and 1286-1696 kg of aggregate. The dosage of naphthalene-based water-reducing agent is 0.4 wt%-0.6 wt%, and the dosage of air-entraining agent is 0.014 wt%-0.018 wt%. The air content of the concrete material in the mixed state is 4%-5%, and the slump is 35-50 mm. Through the synergistic proportioning of water, micro-expansion low-heat silicate cement, fly ash, sand, and aggregate, the low heat of hydration and micro-expansion characteristics of micro-expansion low-heat silicate cement are fully utilized.

This utility model provides a chain conveyor device with sorting function, belonging to the technical field of material conveying equipment. It addresses the problems of existing chain conveyors with sorting function, such as coarse material stacking, low space utilization due to gaps in irregularly shaped materials, and inconvenient movement or unstable support. The device includes a support frame, a chain conveyor mechanism, a sorting robotic arm, a storage bin, a movable support, a feeding assembly, and a moving assembly. The chain conveyor mechanism is fixedly installed on the upper part of the support frame; the sorting robotic arm is bolted to the middle of the chain conveyor mechanism; the storage bin is located above a guide plate; four sets of movable supports are welded inside the support frame; the feeding assembly is located on the upper part of the guide plate; and the moving assembly is located inside the movable support. This utility model has advantages such as improved storage efficiency, stable support, and convenient layout.

The utility model relates to the technical field of inductor terminals, in particular to a copper-clad aluminum structure for an inductor connecting terminal. The connector comprises a connecting terminal and a copper-clad aluminum structure processed at the tail end of the connecting terminal, wherein the copper-clad aluminum structure is provided with a wrapping layer and a solid layer from outside to inside in sequence; the joint of the wrapping layer and the insulating paint layer protrudes outwards to form a protruding step. According to the utility model, the part, which is not coated with the insulating paint, of the tail end of the solid layer is inserted into the copper sleeve, and the wrapping layer extrudes part of the insulating paint layer to form the extrusion layer obliquely wrapping the solid layer, so that the wrapping is tight, and the erosion of the external environment is effectively isolated; the wrapping layer is in close contact with the solid layer, so that the conductivity is good; and a copper surface capable of being directly welded is provided, so that the weldability of the terminal is improved.

The invention relates to a vacuum-assisted compression molding method and mold for a nano microporous insulation panel, and the method comprises the following specific steps: S1, preparing a composite glass fiber cloth bag: uniformly mixing organosilicon modified epoxy resin, hydrophobic nano silicon dioxide, diethylenetriamine, an amino silane coupling agent, polyethylene glycol and acetone to prepare coating slurry, and carrying out vacuum compression molding on the composite glass fiber cloth bag to prepare the composite glass fiber cloth bag; dipping a glass fiber cloth bag in the coating slurry to obtain a composite glass fiber cloth bag; s2, preparing composite powder: mixing and stirring fumed silica, an opacifying agent and high silica fibers to obtain nano-microporous composite powder; s3, the pressing forming mold is positioned and overturned; s4, vertically and flatly spreading the cloth bag; s5, charging and sealing; s6, the mold frame is overturned; and S7, compression molding. Through the synergistic effect of the microporous coating structure of the composite glass fiber cloth bag and the vacuum-assisted compression molding process, the nano microporous heat insulation plate which is high in flatness, free of wrinkles, uniform in edge core density and excellent in heat insulation performance is prepared.

The present application relates to a kind of sample processing platform for carbon fiber number counting and the counting method of carbon fiber number, belong to carbon fiber detection technical field, solve the problem of low accuracy of counting caused by complex carbon fiber sample preparation and poor sample quality in existing method.Sample processing platform includes fixed platform and detachable auxiliary platform, fixed platform is internally provided with support area, sticking area and reference area from top to bottom, three are coaxial ladder-shaped hole structure, and auxiliary platform is sleeve-shaped.Counting method includes: using the sample processing platform to prepare fiber cross-section sample without adhesion and debris;Sample is placed into scanning electron microscope, and the overall picture is obtained by low-resolution scanning and high-resolution puzzle;Overall picture is segmented into slice;Slice is imported into image analysis software, and after gray threshold conversion, denoising, area and roundness screening, it is automatically counted and summed.The present application is simple in sample preparation, clear in image, accurate in counting, and significantly improves the efficiency and accuracy of carbon fiber number statistics.

This invention discloses a sulfide solid electrolyte and its preparation method, belonging to the field of solid electrolyte technology. SA / HPMC nanofiber membranes are prepared using electrospinning combined with barium chloride solution crosslinking technology; amino-modified SA / HPMC nanofiber membranes are obtained by KH-550 modification; LLZNO composite sulfide powder is synthesized through mechanical ball milling and high-temperature sintering; then, it is dissolved with PEO in anhydrous acetonitrile, impregnated with an amino-modified carrier, and hot-pressed to obtain the sulfide solid electrolyte. The fiber membrane of this invention has good mechanical strength and structural stability. This optimized porous fiber structure can guide the uniform adhesion of sulfide powder and pre-build a framework for ion conduction. Ultimately, the sulfide solid electrolyte possesses high ionic conductivity, air stability, and room-temperature cycling performance.

The invention discloses a modified aramid nanofiber / rubber composite material and a preparation method thereof.Aramid nanofibers with good water dispersibility are prepared through epoxy modification, the in-situ polycondensation effect of a silicate ester compound on the surfaces of the nanofibers is improved through a nucleophilic substitution reaction of epoxy groups and amino groups, ANFs (at) SiO2 is formed, and the modified aramid nanofiber / rubber composite material is prepared. The composite material with excellent physical and mechanical properties and ablation resistance can be obtained by using the ANFs (at) SiO2 reinforced rubber with lower parts by weight. In the ablation process, the nano silicon dioxide is firstly melted to form a protective film to coat the surface of the aramid nano fiber, so that the aramid nano fiber is prevented from being corroded and decomposed by heat flow, ceramic structures such as SiC and Si3N4 are generated in situ to promote densification of a carbon layer, and the ablation resistance of the rubber is remarkably enhanced.

This utility model relates to the field of medical device technology, specifically, to a dental protection device for endotracheal intubation, comprising an inner bag (1) and an outer bag (2); a guide plate (3) is provided on the inner bag (1); a coil structure is provided between the inner bag (1) and the outer bag (2); a suture (4) is connected to the coil structure; the suture (4) is connected to the guide plate (3); teeth are provided in the inner bag (1); by inserting the guide plate into the gap of the loose teeth, the device can be positioned and installed, greatly simplifying the installation operation steps; by tightening the two ends of the suture, the inner bag and the outer bag are tightened simultaneously, and the teeth are tightly wrapped; at the same time, the two ends of the suture are wrapped around the guide plate, which can lock the entrance of the device with the teeth, further enhancing the connection stability between the device and the teeth.

The wood product polishing equipment comprises a double-sided polishing grinding structure, one side of the double-sided polishing grinding structure is fixedly connected with a thickness switching structure, the double-sided polishing grinding structure comprises an air pressure adjusting assembly fixed to the rear side of a synchronous adjusting assembly, the synchronous adjusting assembly comprises an adjusting operation table capable of changing wood product adjusting contact, the rear side of the adjusting operation table is fixedly connected with mounting columns capable of fixedly supporting two mounting frames, first sliding grooves are formed in the inner sides and surfaces of the two mounting frames, first sliding blocks matched with the first sliding grooves are slidably arranged in the first sliding grooves, the first sliding blocks are fixedly connected with first through hole blocks provided with ball nuts, and the ball nuts are arranged to slide along the mounting frames in opposite directions.

The utility model belongs to the technical field of bulletproof vest, concretely relates to water inter tactics folding bulletproof vest, include: two distribution in front and back two sides's bulletproof vest body, every bulletproof vest body all includes piece front side and piece back side, be equipped with the folding part for turning over folding between piece front side top and piece back side top, and the folding part is based on folding and makes piece front side with piece back side folding and adhering, be equipped with the connecting piece for connecting between piece front side both sides and piece back side both sides, connecting piece includes three first magic paste prickle face and three first magic paste nap, three first magic paste prickle face respectively set up in piece back side's bottom and both sides, the utility model discloses through the folding part of adding, and the front piece back piece is single -layer material upside folding and wrapping, and the rest three sides are wrapped and fixed bulletproof board with connecting piece, so as to adopt single -piece folding structure and use connecting piece to fix, tightly wrap bulletproof board.

The application discloses a composite negative electrode sheet, a preparation method thereof and a lithium battery. The composite negative electrode sheet comprises a current collector and an active material layer, a first insulating and heat-conducting coating layer and a second insulating and heat-insulating coating layer which are sequentially stacked on the current collector, wherein the first insulating and heat-conducting coating layer comprises an insulating and heat-conducting material, the second insulating and heat-insulating coating layer comprises an insulating and heat-insulating material, the particle size D50 of the insulating and heat-conducting material is D v1 , and the particle size D50 of the insulating and heat-insulating material is D v2 . D v1 <D v2 The composite negative electrode sheet can effectively improve the safety performance of the lithium battery.

This invention belongs to the field of adhesive preparation technology, specifically relating to a high-reliability underfill adhesive and its preparation method. A modified composite filler is prepared using raw materials including submicron silica powder, nano-alumina, and a silane coupling agent. A premix is ​​prepared using raw materials including bisphenol epoxy resin, glycidyl ester epoxy resin, azelaic acid, a dispersant, and an ion adsorbent. The modified composite filler is added to the premix, and after grinding and dispersion, raw materials including a microcapsule curing agent are added to prepare the underfill adhesive. Through synergistic modification of the filler, compounding of the matrix resin, and the use of a microcapsule curing agent, the resulting underfill adhesive exhibits excellent flowability, high bonding strength, and long-term storage stability.

The utility model discloses a novel soft package battery with packaging assembly, which comprises an electric core body, an air bag and a sealing head device, the air bag is located below the electric core body, a positioning part is arranged on the air bag, the positioning part is located at the edge of the electric core body, the positioning part comprises a first positioning part and a second positioning part, the distance from the left side edge of the first positioning part to the right side edge of the second positioning part is equal to the length of the electric core body; the sealing head device comprises a first sealing head device and a second sealing head device located at the two end faces of the air bag, the first sealing head device is provided with a first packaging face and a second packaging face, the second sealing head device is provided with a third packaging face and a fourth packaging face; the first sealing head device and the second sealing head device can move relatively, so that the first packaging face, the first positioning part and the third packaging face are sequentially attached; at the same time, the second packaging face, the second positioning part and the fourth packaging face are sequentially attached.

The application belongs to the technical field of adhesives, and particularly relates to a modified epoxy resin adhesive and a preparation method thereof. The preparation method comprises the following steps: (1) activating graphene by using a silane coupling agent containing active groups to obtain modified graphene; (2) reacting POSS containing polyamino groups with the modified graphene to obtain POSS modified graphene; (3) uniformly mixing epoxy resin, a curing agent and a curing accelerator to obtain a resin matrix; and (4) adding the POSS modified graphene and micron flaky silver powder, uniformly stirring, and curing to obtain the modified epoxy resin adhesive. By adding the POSS modified graphene, the technical problems of difficult dispersion of the micron flaky silver powder and difficulty in building a conductive path are solved, the uniform dispersion of the graphene and the micron flaky silver powder is promoted, the volume resistivity of the conductive adhesive is reduced, and the conductive capacity and the mechanical properties are enhanced.

The utility model relates to the field of concrete 3D printing discloses a steel strand dynamic deviation rectification spray head device for concrete 3D printing, including two support plates, fixedly connected with same track between two support plates, the outside of track is equipped with electric cantilever, the below of electric cantilever is equipped with the agitator barrel of conical, there is stirring mechanism in the agitator barrel, the stirring mechanism includes hollow shaft, fixedly connected with steel strand limiter in the hollow shaft. The utility model has the advantages and effects as follows: through the limit orientation of hollow shaft integrated steel strand, dynamic deviation rectification and concrete conveying function, the synergic control of pressure regulation and control and stirring motor is combined, the accurate synchronous printing of steel strand and concrete is realized, steel strand positioning precision is high, and the package is dense, effectively promotes the tensile and bending performance of printing structure, and whole course automation operation, significantly improves construction efficiency.

This invention relates to a preamplifier for a single-channel marine seismic receiving cable. The preamplifier has a sealing plug at both ends of the cable insertion hole at the front end of the housing. The cable passes coaxially through the plug holes and is slidably sealed to the sealing plug. Each sealing plug has a pressure ring coaxially mounted on its large end face. The pressure ring is pressed into the conical bore section by a locking bolt, and the pressure ring does not contact the end face of the housing. The locking bolt is fixed to the housing wall, and a smooth cylindrical section slides with the pressure ring. An inner pressure ring abuts against the end face of a pressure plate via an elastic element. The pressure plate is located near the front end of the housing and is coaxially and integrally connected to the cable. There is a tensile movement range between the cable and the data interface of the circuit board, so that when the cable is towed by a ship, the pressure plate compresses the elastic element, further pressing the inner pressure ring against its corresponding inner sealing plug. This invention can significantly improve the preamplifier's sealing, vibration resistance, and the reliability of its connection to the cable.

A water tank blister packaging device comprises a blister machine, preliminary blister packaging work of a heat dissipation water tank can be completed through the blister machine, and a discharging system is arranged on the discharging side of the blister machine. The discharging system comprises a plurality of sliding rods which are horizontally arranged in parallel, and the sliding rods are arranged in the discharging direction of the plastic vacuum forming machine; the discharging system further comprises a sliding driving mechanism and a moving rod in transmission connection with the sliding driving mechanism, and the moving rod is horizontally arranged above the sliding rod, is perpendicular to the sliding rod and can be driven by the driving mechanism to slide in the length direction of the sliding rod. A clamping jaw is arranged on the side, close to the plastic vacuum forming machine, of the moving rod, the heat dissipation water tank subjected to plastic vacuum forming packaging can be clamped to the sliding rod through the clamping jaw along with movement of the moving rod, follow-up packaging ending work can be completed on the sliding rod, packaging of the heat dissipation water tank is tighter, the heat dissipation water tank is effectively prevented from moving in a cardboard box, and the service life of the heat dissipation water tank is prolonged. It is guaranteed that the structure of the heat dissipation water tank is not damaged, and meanwhile it is guaranteed that the sealing performance of the heat dissipation water tank in the transferring process is not affected.

This utility model discloses a wiring device for a drop weight testing machine, including a base. Fixed frames are fixed to both sides of the upper end of the base. A top plate is installed on the upper end of each fixed frame. A crossbeam is slidably connected between the top plate and the base. The crossbeam has an opening, within which an auxiliary traction mechanism and a clamping mechanism are installed. A current collector is installed on one side of the crossbeam via a current collector clip. An insulating box is installed on one side of the fixed frame. Insulating box covers are installed on both sides of the insulating box. A sliding wire groove is installed inside the insulating box. This utility model rationally arranges and protects the wires. The sliding wire groove provides a relatively enclosed space for the wires, avoiding direct exposure and reducing the risk of wire insulation wear. This greatly improves equipment safety, prevents leakage, and further ensures operator safety and stable equipment operation. Simultaneously, it eliminates the need for complex wiring connections and debugging processes, improving equipment efficiency.

The invention discloses an organic semiconductor material based on an asymmetric fused heterocycle and a preparation method and application thereof, and belongs to the technical field of perovskite solar cells, the self-assembled monomolecular layer organic semiconductor material provided by the invention uses a fused ring as a functional group, and can promote SAM molecules to form a more ordered monomolecular layer which is more tightly stacked. Pinhole defects are reduced; and exposed points on the substrate can be effectively reduced due to better coverage. In addition, by introducing the S heterogen, a surface work function and an interface dipole can be effectively regulated and controlled, so that carrier transmission is promoted, surface non-radiative recombination is inhibited, the energy conversion efficiency is effectively improved, and the photoelectric conversion efficiency of the perovskite solar cell exceeds 26%. In addition, the material significantly improves the long-term stability of devices, prolongs the service life, provides a new technical scheme for efficient and stable perovskite solar cells, and has wide application prospects.

The invention relates to the technical field of organic light-emitting diodes, in particular to IPC C07, and more particularly relates to an OLED light-emitting organic material and an OLED light-emitting device thereof. The OLED light-emitting organic material provided by the invention comprises a naphthoalicyclic ring structure, and the electron donating ability of molecules is improved, so that the electron transfer ability is improved, holes are stabilized, and the stability of the molecules is further improved. When the compound is applied to the organic electroluminescent device, the device can have high efficiency, molecules have high stability, the luminous efficiency of the device can be further improved, and the service life of the device can be further prolonged.

The invention belongs to the technical field of medical catheters, and particularly relates to an interventional microcatheter and a machining jig of the interventional microcatheter. The interventional microcatheter comprises a microcatheter body, a developing ring is fixedly embedded in the inner wall of a far-end catheter opening of the microcatheter body, and a groove is formed in the outer wall of the connecting end of the developing ring; the inner wall of a far-end pipe opening of the micro-catheter body is fixedly connected with a limiting clamping ring matched with a groove in the outer wall of the connecting end of the developing ring. The interventional micro-catheter machining jig has the functions of precise forming, high-speed cooling and integrated polishing, it is ensured that the joint is tightly attached, the air hole defect does not exist, the use reliability and product safety of the machining jig are remarkably improved, meanwhile, the machining qualification rate of interventional micro-catheters is increased, and the production cost is reduced. The processing efficiency and the operation convenience of the far end of the interventional micro catheter and the developing ring are improved, and the extra labor intensity of workers is greatly reduced.

The utility model relates to cleaning device technical field, and disclose a kind of production line garbage automatic recovery device, solve the existing recovery device when collecting larger type paper garbage, since larger block's type paper garbage volume is big, fluffy and irregular shape, easily occupy the collection space of garbage bag, reduce the collection efficiency and cause the problem of garbage bag waste, it includes frame, the both ends of frame bottom are fixedly installed with support leg, the front side of frame is fixedly installed with PLC logic controller, the rear side of frame is fixedly installed with support frame, the lower part of one side of support frame is fixedly installed with servo motor, the upper part of the rear side of frame is fixedly installed with placing rack, and installation cylinder is placed on placing rack;The present recovery device when collecting larger type paper garbage, can be pulverized to type paper garbage, simultaneously, garbage bag is shaken, so that type paper garbage is more compact, and then improve the collection efficiency and reduce the waste of garbage bag.

This invention provides a mixed aggregate mine backfill material of ultra-fine iron tailings sand and steel slag sand and its preparation method, belonging to the field of building materials. The mixed aggregate mine backfill material of ultra-fine iron tailings sand and steel slag sand provided by this invention comprises the following components in parts by weight: 6-13 parts iron tailings powder, 9-20 parts slag powder, 0.5-1 part desulfurization ash, 20-38 parts ultra-fine iron tailings sand, 10-28 parts steel slag sand, 0.6-1.4 parts activator, and 25-41 parts water. The mixed aggregate mine backfill material of ultra-fine iron tailings sand and steel slag sand provided by this invention has a 120-day shrinkage rate as low as 2.12% and a 28-day compressive strength as high as 7.68 MPa, exhibiting low shrinkage and high compressive strength.