1082results about How to "Shorten the setting time" patented technology

A system and method for managing a vehicle Ethernet communication network are disclosed. More specifically, each unit in a vehicle Ethernet communication network is configured to initially enter a power-on (PowerOn) mode when is applied to each unit of the vehicle to initialize operational programs. Once powered on, each unit enters a normal mode in which a node for each unit participates in a network to request the network. Subsequently, each unit enters a sleep indication (SleepInd) mode where other nodes are not requested even though the network has already been requested by the other nodes. A communication mode is then terminated at each unit and each unit enters a wait bus sleep (WaitBusSleep) mode in which all nodes connected to the network are no longer in communication and are waiting to switch to sleep mode. Finally, each unit is powered off to prevent communication between units in the network.

A polyester polyol prepared from a composition including a phthalic acid based material containing more than 10% by weight of ortho-phahalic or derivatives thereof, an aliphatic dicarboxylic acid (e.g., dodecanedioic acid), and a polyol (e.g., a glycol). A polyurethane adhesive, such as a polyurethane reactive hot-melt adhesive, is made using the polyester polyol, which exhibits improved initial bonding strength, shortened setting time, and ability to bond to low surface energy substrates such as ABS. The methods to prepare the polyester polyol and the polyurethane adhesive, and the method to use them are also disclosed.

The reflectarray includes a plurality of cells integrated in a PCB and externally illuminated by an input signal from a feeding source at a frequency f_i, and an output signal is reflected, where each cell of the reflectarray is an AIA formed by a passive radiating element connected to an active circuit, which can be either an oscillator, or a push-push oscillator or a SOM, where the passive radiating circuit is placed on a reflective surface forming a side of the reflectarray and the active circuit is placed on the reverse side, the active circuit producing an output signal with a frequency related to the input frequency f_i and the oscillation frequency f_osc of said active circuit. This phase relationship is determined by an output phase variation, which is controlled by electronic means integrated in the reflectarray system, which allows an output phase variation interval even higher than 180°.

The invention discloses a preparation method for a polyocarboxy acid water reducing agent for precast units, which belongs to the field of water reducing agent. Under the action of a persulphate initiator, methoxypolyethylene glycol acrylate, acrylic acid, unsaturated sulfonic acid or a salt monomer b thereof, unsaturated amide or a salt monomer c thereof are copolymerized in an aqueous solution; a terminator is used to process the rest initiator of the reaction at a later polymerization stage; and finally alkaline solution is used for neutralization and the water reducing agent is obtained. The methoxypolyethylene glycol with high polymerization degree is introduced as a grafting side chain, thereby making the prepared water reducing agent effectively shorten the concrete coagulation time without reducing the concrete initial fluidity and improving the concrete compression strength. The early strength type polyocarboxy acid high performance water reducing agent can be widely applied to the construction of various concrete projects with a low temperature or early strength requirements, in particular to the low energy consumption production process of precast concrete units. The water reducing agent has wide generalization space.

The invention belongs to the technical field of insulation material for building, and particularly relates to a foam cement insulation material for exterior wall and a preparation method thereof. The foam cement insulation material for exterior wall is prepared from raw materials comprising ordinary portland cement, sulphoaluminate cement, fly ash, silica fume, an expansive agent, a coagulating enhancer, a tackifier, a water-reducing agent, a waterproofing agent, a foaming agent, a foam stabilizer, fiber and water. The preparation method comprises the following steps: (1) first conducting dry mixing on ordinary portland cement, sulphoaluminate cement, fly ash, silica fume and the expansive agent, adding coagulating enhancer, tackifier, water-reducing agent, waterproofing agent, foam stabilizer, water and fiber, and stirring to obtain a slurry; and (2) adding the foaming agent in the slurry, and filling the foamed slurry into a mold. The foam cement insulation material for exterior wall has good fire resistance, long service life, good insulation property, light weight, high strength, low water absorption and good crack resistance.

A memorial object cast in a mold and formed of a concrete mix having up to about 50% sand, up to about 25% aggregate, up to about 25% cement, and water. In one embodiment of the invention cremation ash is incorporated in the mix up to about 60% of the mix, with the percentage of at least one of the other ingredients, preferably sand and/or aggregate, being reduced corresponding to the amount of cremation ash added. In another embodiment, a cavity is formed in the object for receiving and holding a separate container holding cremation ashes. Various additives can be added to the mix, either alone or in combination, including an accelerator, an air entrainer, a plasticizer, and glass fibers. One or more of a motion detector, voice-activated recording, water effects and/or an illumination device can be mounted in the object.

A composition and method for reducing freeze-thaw heave risk over flash-filled voids are disclosed. A composition can include cementitious fly ash, water and cellular foam. The composition can optionally include a filler, e.g., Type F fly ash, or additional desired components. A method can include mixing the desired composition and applying the composition to a void. The method can optionally include determining the desired composition based on various factors.

The invention provides a zeolite-like lightweight heat preservation and sound insulation board applied to a building outer wall, or wall filling of a nonbearing wall or a building top layer. The board comprises dry powder slurry and lightweight aggregate, wherein the dry powder slurry is a zeolite-like geopolymer formed by the excitation of a composite alkali excitant and comprises the following components in percentage by weight: 70-85 percent of coal ash, 5-15 percent of phosphorus slag, 8-20 percent of composite alkali excitant and 0.1-0.3 percent of anticracking fiber; the lightweight aggregate is EPS (Expandable Polystyrene) granules; and the charge ratio of the dry powder slurry to the lightweight aggregate is (89-95): (5-15). The zeolite-like lightweight heat preservation and soundinsulation board has low volume weight, high compression strength, favorable heat preservation and heat insulation properties and good sound absorption effect on various frequency bands of sound waves. The invention also provides a production method of the zeolite-like lightweight heat preservation and sound insulation board. The method has simple process conditions and is easy to realize.

The invention relates to a method for controlling setting and hardening processes of magnesium phosphate cement. According to the method, the heat releasing speed of the magnesium phosphate cement is reduced by increasing addition of borax retarder to delay setting of magnesium phosphate cement mortar and adjust the setting time of the mortar within 20-150 minutes effectively, then a heat-transfer process between the mortar and an environment and the setting and hardening processes of the mortar are accelerated by increasing early environmental temperature of the mortar, and the early strength is form quickly and reaches 20-30MPa in an hour. The method solves the problem that the early strength of a magnesium phosphate cement system develops slowly due to the short setting time and a larger mixing amount of the borax retarder when the magnesium phosphate cement serves as a quick repairing material for a repairing project to some extent. Available test results indicate that the method can control the setting and hardening processes of the cement conveniently and effectively.

The invention relates to an epoxy resin emulsion modified cement-based patching material and a preparation material thereof. The epoxy resin emulsion modified cement-based patching material is characterized by comprising the following raw materials in parts by weight: 100 parts of sulphate aluminum cement, 5 to 40 parts of epoxy resin emulsion, 5 to 20 parts of waterborne curing agent, 0.4 to 1.0 parts of accelerator, 2 to 10 parts of waterborne tackifier rosin resin emulsion, 0.2 to 1.0 parts of water reducer, 5 to 15 parts of silica fume, 40 to 60 parts of quartz powder and 10 to 30 parts of water. According to the epoxy resin emulsion modified cement-based patching material and the preparation material thereof disclosed by the invention, the sulphate aluminum cement and the accelerator are adopted so as to shorten the setting time of the patching material, therefore the underwater dispersion resistance of the patching material is improved; the mechanical property of the cement-based patching material and bonding strength between the cement-based patching material and a basement layer are improved by utilizing the epoxy resin emulsion; the prepared epoxy resin emulsion modified cement-based patching material has the characteristics of being short in setting time, high in underwater dispersion resistance, good in underwater bonding performance and the like, and can be used for concrete crack mending in underwater and humid environments.

The invention provides a foam concrete with large-dosage polystyrene particles and a preparation method thereof, which solve problems of water leakage and frost resistance of the foam concrete. The foam concrete comprises components in part as follows: 63-81 parts of ordinary portland cement, 63-81 parts of quick-hardening sulphoaluminate cement, 10-30 parts of coal ash, 0.5-1.3 parts of water reducing agent, 1-2 parts of accelerating agent, 0.6-1.2 parts of early strength agent, 1-2 parts of fiber, 2-4 parts of silica sol, and 50-70 parts of water. The percentage in volume (liter) of the polystyrene particles in added water is 200-400percent, and the percentage in volume (liter) of foam in the added water is 100-600percent. In the preparation process, the treated polystyrene particles stand for 10 min, and the foam can be added after standing uniformly-stirred cement slurry for 20 min. On the premise of ensuring the intensity, the foam cement disclosed by the invention has the advantages of higher heat preservation and heat-shielding performance, higher electric insulating performance, lower volume weight and lower water absorption. The problems of the water leakage and the frostresistance of the foam cement can be solved.

The invention discloses a cement-based adhesive which consists of an inorganic gel, elasticity modulus filler, sand and a dry-mixed mortar additive, wherein the mass percentages of the various components in the adhesive are as follows: 35-45% of inorganic gel, 15-30% of elasticity modulus filler, 17-47% of sand, 3-8% of dry-mixed mortar additive and the balance of water. The cement-based adhesive disclosed by the invention has the following beneficial effects that by adding the low elasticity modulus filler which has the advantages of good elasticity, shock-proofing, sound insulation and the like, the cement-based adhesive has the characteristics of shock absorbing, noise reduction and the like, so that a problem of noise generated from the collision of ceramic tiles in a public place is relieved; in addition, the cement-based adhesive provided by the invention also solves the problems of low compressive strength, low bonding strength and the like of the adhesive after the low-modulus filler is added; shearing strength on the interfaces of the ceramic tiles caused by heat expansion and cold contraction is reduced and the bonding durability of the ceramic tiles on the basis of shock absorbing and noise reduction is improved; therefore, the cement-based adhesive is quite high in promotional value.

An image display apparatus equipped with an analog tuner and a digital tuner includes a key input unit for enabling a user to input an automatic channel scan command and other requests; a controller for conducting channel scan in response to the automatic channel scan command inputted through the key input unit, the channel scan first being conducted on analog channels and then digital channels by using the analog tuner and the digital tuner, or first being conducted on digital channels and then analog channels by using the digital tuner and the analog tuner, wherein the comparison of the number of channels scanned first with a predetermined number of channels determines a channel scan method; and a memory for storing analog channels/digital channels being automatically scanned.

The invention discloses a shoe material hot-melt adhesive sheet. The shoe material hot-melt adhesive sheet comprises the following raw material components: 35-40% of elastomer, 45-50% of engineering plastic, 10-15% of EVA (ethylene vinyl acetate) binding masterbatch and 0.5-1.5% of antioxidant. A production process of the shoe material hot-melt adhesive sheet provided by the invention comprises the steps of mixing the elastomer, the EVA binder masterbatch, the engineering plastic and the antioxidant in a twin-screw extruder, pressurizing a melt by a melt pump, then enabling the melt to flow out of a T-shaped die head, hot-bonding double surfaces of polyester non-woven mesh fabric on the upper surface and lower surface of the melt of the sheet in a three-roller calendering machine, further calendering and shaping, cooling and shaping the sheet by a cooling roller cylinder after shaping, cutting edges, and then rolling or cutting according to a fixed size. The elastomer hot-melt adhesive sheet can be used for manufacturing finished products of shoe heads and back liners after being stamped by a mold, the shaped adhesive sheet finished products are placed into shoe inner liners and interlayers of shoe vamps for hot-pressing, binding and solidifying, and the production process flow is simplified and is suitable for mass production of an assembly line.

The invention discloses a carboxylic acid copolymer concrete slump retaining agent. The slump retaining agent is a copolymer which has the molecular weight of between 10,000 and 100,000 and is synthesized by using modified polyester, unsaturated carboxylic acid and cross-linking agent and by adopting a redox system and an initiator; 30 percent liquid alkali is added into the copolymer at the temperature of 45 DEG C to neutralize the copolymer and the concentration of the neutralized solution is diluted to 45 percent by softened water, and the pH value of the mixed solution is controlled to be between 6.0 and 7.0. Compared with the prior art, the slump retaining agent is directly prepared by polymerization which is performed by using the modified polyester, the unsaturated carboxylic acid and the cross-linking agent and by adopting the redox system and the water soluble initiator, activated macro-monomers of esters are not required to be prepared, the process is simple and the reaction temperature is low. The slump retaining agent has a good plastic retaining effect on middle and low slump concrete or high slump concrete and does not prolong the setting time of the concrete. Meanwhile, the cross-linking agent contained in the structure has a slow-release effect under the action of a strongly alkaline cement environment and slowly releases dispersive low-molecular polymers, so the problem of slump loss of the concrete is effectively solved.

The invention discloses a low-dosage high-early-strength alkali-free liquid accelerator and a preparation method thereof. The alkali-free liquid accelerator is prepared from the following raw materials: 1, an alkali-free liquid accelerator; 50%-60% of modified aluminum sulfate, 2%-4% of a fluorine-aluminum complex solution, 3%-6% of an organic cosolvent, 1%-2% of a pH regulator, 0.5%-1.5% of an inorganic stabilizer, 0.3%-0.5% of a viscosity regulator, 4%-6% of a composite early strength agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The invention also provides a preparation method of the alkali-free liquid accelerator. The preparation process of the alkali-free liquid accelerator is simple; hydrofluoric acid-free process, alkali-free, chlorine-free, rust-free steel bar, non-polluting environment. Meanwhile, when the mixing amount of the alkali-free liquid accelerator is 5%-6%, the technical requirements of GB/T35159-2017 on the alkali-free accelerator can be met, the one-day compressive strength is larger than or equal to 13.0 MPa, and the alkali-free liquid accelerator has the advantages of being low in mixing amount, good in stability, high in early strength and large in later strength retention rate.

A Ubicell base station includes a Ubicell base station, one or more Ubicell core network elements, and an integrated management server. The Ubicell base identifies position information thereof using a GPS module, and at a time of setup, provides environment setting information including the position information thereof. Each Ubicell core network element, upon receiving environment setting information of an arbitrary Ubicell base station, generates an environment construction information file of the arbitrary Ubicell base station, registers the arbitrary Ubicell base station, and sends the environment construction information file to the arbitrary Ubicell base station. The integrated management server identifies the Ubicell core network element in a corresponding position based on the environment setting information, provided from the Ubicell base station, and provides the environment setting information of the Ubicell base station to the Ubicell core network element.