4results 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 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.

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.