8results about How to "Fast hardening" patented technology

The present application aims at the problems of excessive consumption of traditional cement limestone resources, excessive energy consumption and high carbon emission, and provides a carbonated hardened low-calcium cement and a preparation and hardening method thereof, which is a hardening method for curing low-calcium cement by CO2 carbonation. The mass percentage composition of cement raw material components is: limestone: 60-70%, sandstone or clay or silica ash: 15-25%, phosphogypsum, fluorogypsum or desulfurization gypsum: 5-25%, component A: 0.5-2%. Component A is composed of the following raw material components in mass percentage: fluorite 0-50%, barium slag: 0-50%, lithium slag 0-50%, wood ash 0-50%, industrial sodium carbonate 0-30%. The composition design of carbonated hardened cement clinker minerals is C2S: 10-90%, C5S2$: 10-90%, C$: 0-5%, C4A3$: 0-10%, etc. In the present application, the limestone required for the cement clinker is lower than that of ordinary Portland cement clinker, the calcination temperature is reduced by 200-350 DEG C than that of ordinary Portland cement clinker, and the energy consumption and carbon emission are significantly lower than those of Portland cement; the low-calcium cement is hardened by CO2 carbonation curing, which can make the cement obtain excellent mechanical properties within 2 hours.

The invention provides high-strength repairing cement and a preparation method thereof, and relates to the technical field of preparation of epoxy resin cement. The daub is composed of a component A and a component B in equal proportion, the component A is composed of epoxy resin, talcum powder, barium sulfate, modified graphite powder, calcium stearate, dodecylphenol and graded particle size quartz powder, and the component B is composed of a curing agent, talcum powder, barium sulfate and titanium dioxide. The defects in the prior art are overcome, the good adhesion effect of the cement is guaranteed, meanwhile, the mechanical strength of the hardened cement is effectively improved, and the repairing effect of the cement is comprehensively improved.

The invention provides a variable temperature foaming-based assembled energy-saving thermal insulation board, which is prepared from the following raw materials in parts by mass: 60 to 80 parts of blast furnace slag powder, 10 to 20 parts of solid waste-based sulfur aluminum iron series gelling clinker, 10 to 25 parts of original byproduct gypsum, 2 to 6 parts of silica fume, 0.5 to 2 parts of carbide slag, 0.5 to 1.2 parts of calcium stearate, 0.2 to 0.6 part of polycarboxylate superplasticizer and 0.02 to 0.1 part of xanthan gum. 0.2 to 1 part of dispersible latex powder, 0.1 to 0.5 part of chopped fiber, 0.02 to 0.06 part of composite retarder, and a foaming agent; according to the method, hydrogen peroxide is selected as a foaming agent, and due to the low alkalinity characteristic of a gelling system, the hydrogen peroxide cannot be quickly decomposed after being added, so that the stirring time after the hydrogen peroxide is added can be prolonged, and meanwhile, it is guaranteed that fresh slurry has the high flow state characteristic. After the mixed slurry is poured into a mold, decomposition of hydrogen peroxide is catalyzed by applying a medium-temperature heat source, and at the moment, the foaming expansion process of the fresh slurry is parallel to the curing and hardening process, so that controllable regulation and control of the foaming process are realized, and the hardening speed of the slurry is increased. Finally, the solid waste-based energy-saving thermal insulation board for the fabricated building is prepared on the basis of variable-temperature foaming.

The invention provides an inorganic binder sand hardening process method and application, and the inorganic binder sand hardening process method comprises the following steps: hardening molded inorganic binder sand by adopting one of the following modes: mode I, blowing in a vaporized organic curing agent and at least one of CO2 and compressed air to carry out blowing hardening on the molded inorganic binder sand; in the second mode, the formed inorganic binder sand is subjected to primary hardening by blowing CO2 and compressed air, and then the inorganic binder sand is immersed into an organic curing agent to be subjected to secondary hardening; thirdly, the formed inorganic binder sand is immersed in an organic curing agent to be hardened; mode 4, spraying an organic curing agent on the surface of the formed inorganic binder sand for hardening; alternatively, the method comprises the following steps: forming inorganic binder sand from the crude sand, the binder and the organic curing agent in a layer-by-layer 3D printing manner, and hardening at the same time. According to the method, the hardening rate and quality of the inorganic binder sand can be greatly improved.

The application relates to a composite high-strength supporting material and a preparation method and construction process thereof. Tailings sand powder in the application plays a certain lubricating role in the system and can reduce the slurry viscosity; the prepared special polycarboxylic acid water reducing agent has a micro-crosslinking structure and multiple adsorption groups, has extremely strong adsorption capacity on cement and tailings sand, and can reduce the slurry viscosity; the prepared organic polymer can quickly form an interpenetrating network structure with the cement-based material on the sprayed base surface, improves the slurry adhesion speed, reduces the spraying rebound rate, and effectively improves the strength, heat resistance, flame resistance and surface protection capacity of the target supporting material by introducing rigid / heat-resistant structures, flame-resistant structures and hydrophobic structures; the prepared high-strength supporting material has super-high compressive strength and bonding strength, fast hardening speed after spraying, excellent anti-cracking performance and good durability, improves the utilization rate of solid waste resources, has a simple and convenient construction process and high efficiency, and is suitable for construction in various complex environments.

The working box assembly applied to the 3D printing equipment is characterized in that the working box assembly comprises a working box body, a lifting bottom plate and a curing mechanism, the working box body is a frame-shaped structural part defined by a plurality of side plates, and the lifting bottom plate is movably arranged in the working box body; a plurality of first ventilation grooves are formed in at least one side plate at intervals, ventilation nets are laid on the first ventilation grooves, the curing mechanism comprises a sealing cover and an air supply device, the sealing cover covers the outer side faces of the side plates, one end of the air supply device communicates with the sealing cover, and the other end of the air supply device communicates with the air supply device. And the air supply device is communicated with the first ventilation groove through the sealing cover. According to the scheme, the problem that an existing binder jet printing product is difficult to cure, uneven in curing and low in curing efficiency, and consequently the product quality is poor can be solved.

This invention relates to a nano-metakaolin-modified hydraulic lime-based composite material and its preparation and application. The composite material comprises natural hydraulic lime and nano-metakaolin dispersed in the natural hydraulic lime, wherein the mass ratio of natural hydraulic lime to nano-metakaolin is (60-90):(10-40). The nano-metakaolin-modified hydraulic lime-based composite material of this invention exhibits controllable dispersibility and fluidity in the slurry after mixing with water. It also demonstrates good rock compatibility, low soluble salt content, controllable curing time, suitable post-curing strength, low permeability, and low shrinkage and expansion rate. The presence of a repair agent can specifically enhance the additional protective performance of the reinforcement material. It possesses high applicability, safety, and durability for the protection of stone cultural relics, without causing derivative damage.

This utility model discloses a construction structure for a dry-installation, quick-setting waterproof integrated panel for bathrooms. It includes, sequentially arranged on the floor slab, an interface agent layer, a quick-drying thick self-leveling mortar layer, a JS waterproof layer, a waterproof backing board layer, a tile adhesive layer, and an anti-slip tile layer. The quick-drying thick self-leveling mortar layer is a building material composed of ordinary silicate cement, aluminum sulfate cement, calcium oxide, fine perlite, and dried river sand. The quick-drying thick self-leveling mortar layer is poured onto the interface agent layer, and the JS waterproof layer is applied onto the quick-drying thick self-leveling mortar layer. The waterproof backing board layer is assembled from extruded polystyrene boards and is fixed to the JS waterproof layer using studded adhesive strips. This application uses the quick-drying thick self-leveling mortar layer and the waterproof backing board layer as leveling layers, featuring fast construction and fast hardening speed. Initial setting occurs within two hours after construction, and people can walk on it after four hours. The leveling layer is then formed by bonding the waterproof backing board layer. The construction is simple, convenient, and efficient.